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  • Inorganic Chemistry  (8,498)
  • Ecology
  • 1980-1984  (3,554)
  • 1950-1954  (1,627)
  • 1935-1939  (3,365)
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  • 1
    Electronic Resource
    Electronic Resource
    Aerobic denitrification: a controversy revived (1984)
    Springer
    Archives of microbiology 139 (1984), S. 351-354 
    Details
    ISSN: 1432-072X
    Keywords: Aerobic denitrification ; Thiosphaera pantotropha ; Nitrate reduction ; Bacterial selection ; Ecology ; Oxygen
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Abstract During studies on the denitrifying mixotroph, Thiosphaera pantotropha, it has been found that this organism is capable of simultaneously utilizing nitrate and oxygen as terminal electron acceptors in respiration. This phenomenon, termed aerobic denitrification, has been found in cultures maintained at dissolved oxygen concentrations up to 90% of air saturation. The evidence for aerobic denitrification was obtained from a number of independant experiments. Denitrifying enzymes were present even in organisms growing aerobically without nitrate. Aerobic yields on acetate were higher (8.1 g protein/mol) without than with (6.0 g protein/mol) nitrate, while the anaerobic yield with nitrate was even lower (4 g protein/mol). The maximum specific growth rate of Tsa. pantotropha was higher (0.34 h-1) in the presence of both oxygen (〉80% air saturation) and nitrate than in similar cultures not supplied with nitrate (0.27 h-1), indicating that the rate of electron transport to oxygen was limiting. This was confirmed by oxygen uptake experiments which showed that although the rate of respiration on acetate was not affected by nitrate, the total oxygen uptake was reduced in its presence. The original oxygen uptake could be restored by the addition of denitrification inhibitors.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00408378
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  • 2
    Electronic Resource
    Electronic Resource
    Photosynthetic metabolism in the cyanophytaOscillatoria rubescens D.C. (1982)
    Springer
    Archives of microbiology 131 (1982), S. 107-111 
    Details
    ISSN: 1432-072X
    Keywords: Cyanophyta ; Cyanobacteria ; Oscillatoria rubescens ; Photosynthetic pathways ; Photosynthetic enzymes ; Ecology
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Abstract Short term14C labelling experiments and enzymatic activities related to primary pathways of photosynthesis have been studied in the cyanophytaOscillatoria rubescens D.C. from axenic cyclostat cultures. Responses of samples from cultures with different amounts of nitrogen are presented and compared. Variations in photosynthetic pigments are used to quantify the degree of nitrogen starvation at different levels. PEPcarboxylase activity remains low and is not affected by nitrogen starvation. RuBPcarboxylase activity is lowered to nearly two thirds of its normal metabolic rate by starvation but PEPcarboxykinase and aspartate aminotransferase activities are significantly higher in this case. Malate dehydrogenase is slightly altered and malic enzyme is never active. Starved algae replaced in fresh complete media fix rapidly14C in nitrogen compounds such as amino acids. Results are discussed in regard to both physiological and ecological characteristics ofO. rubescens. PEPcarboxykinase can play a role in making efficient use of HCO 3 - .
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01053990
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  • 3
    Electronic Resource
    Electronic Resource
    Bacillus tusciae, a new species of thermoacidophilic, facultatively chemolithoautotrophic hydrogen oxidizing sporeformer from a geothermal area (1984)
    Springer
    Archives of microbiology 139 (1984), S. 397-401 
    Details
    ISSN: 1432-072X
    Keywords: Bacillus tusciae ; New species ; Taxonomy ; Ecology ; Chemolithoautotrophy ; Hydrogen oxidation ; Hydrogenase ; Thermophily ; Geothermal manifestation ; Solfatara
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Abstract A thermophilic, chemolithoautotrophic, hydrogen-oxidizing sporeformer has been isolated from ponds in a solfatara in the geothermal area of Tuscany (Italy). Some physicochemical parameters of the habitat were determined. The habitat was characterized by the presence of molecular hydrogen in the escaping gases, a very low content of phosphate and organic matter. Temperature and water level in the ponds varied widely. The organism formed oval, subterminal spores, which swelled distinctly the sporangium. Optimal growth occured between pH 4.2 and 4.8 at 55°C. It grew best under autotrophic conditions, but organic substrates including short chain fatty acids, amino acids and alcohols could also support heterotrophic growth. Sugars were not metabolized. The hydrogenase was soluble but did not reduce pyridine nucleotides. Based on its morphological and biochemical features, the organism belongs to the genus Bacillus, but differs from all the previously described species. It is therefore proposed as constituting a new species, Bacillus tusciae.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00408386
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  • 4
    Electronic Resource
    Electronic Resource
    Ecological planning: A review (1981)
    Springer
    Environmental management 5 (1981), S. 495-505 
    Details
    ISSN: 1432-1009
    Keywords: Suitability analysis ; Land-use assessment ; Ecology ; Planning ; Human ecology
    Source: Springer Online Journal Archives 1860-2000
    Topics: Energy, Environment Protection, Nuclear Power Engineering
    Notes: Abstract Beginning with the passage of the National Environmental Policy Act in 1969, the federal government of the United States has enacted numerous pieces of legislation intended to protect or conserve the environment. Other national governments have also enacted environmental legislation during the past two decades. State and local governments have also adopted policies concerned with environmental planning and management. Multiple laws and overlapping governmental agency responsibilities have confused development and resource management efforts. A comprehensive methodology that integrates the legal mandates and the agency missions into a common and unified framework is needed. Ecological planning offers such a method. Application of the method allows planners and resource managers to better understand the nature and character of the land and/or resource and therefore make better decisions about its appropriate use or management. The steps taken in an ecological planning process—1) goal setting, 2) inventory and analysis of data, 3) suitability analysis, 4) developing alternatives, 5) implementation, 6) administration, and 7) evaluation—are outlined and explained. Hand-drawn overlays and computer programs as techniques for handling ecological planning information are compared. Observations and suggestions for further research are offered.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01866722
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  • 5
    Electronic Resource
    Electronic Resource
    Ideology and wildlands management: The case of Rondeau Provincial Park, Ontario (1980)
    Springer
    Environmental management 4 (1980), S. 111-124 
    Details
    ISSN: 1432-1009
    Keywords: Carolinian ; Ecology ; Ideology ; Policy ; Rondeau ; Technology ; Wildland Management ; Parks
    Source: Springer Online Journal Archives 1860-2000
    Topics: Energy, Environment Protection, Nuclear Power Engineering
    Notes: Abstract This is a critical examination of some of the basic concepts that have guided management of parks and related reserves, often termed wildlands. Study is focussed on Rondeau Provincial Park, Ontario, and on concepts such as wilderness, primeval forest, and the Carolinian forest. Deer culling and other management policies and practices have been based upon the idea that the highly valued sassafras, tulip, and other species of the Carolinian forest are decreasing due to browsing. Field mapping and analysis of historic vegetation records indicate that this trend is not in fact occurring. Historic research also reveals difficulties in defining the Carolinian or other perceived types of forest for management purposes. A major reassessment of ideology and management policy and practice seem to be required in Rondeau and other wildlands. Vague or general concepts such as wilderness or preservation should be strongly complemented and supported by more precise statements of objectives, a learning attitude, and experimentation and research. As a result of the technical uncertainties and value judgments frequently involved, management should also be based upon the expressed preferences and continuing involvement of citizens.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01866508
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  • 6
    Electronic Resource
    Electronic Resource
    Competition for fluctuating nutrient (1983)
    Springer
    Journal of mathematical biology 18 (1983), S. 255-280 
    Details
    ISSN: 1432-1416
    Keywords: Population dyamics ; Ecology ; Periodic solutions
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Mathematics
    Notes: Abstract A model of the competition of n species for a single essential periodically fluctuating nutrient is considered. Instead of the familiar Michaelis-Menten kinetics for nutrient uptake, we assume only that the uptake rate functions are positive, increasing and bounded above. Sufficient conditions for extinction are given. The existence of a nutrient threshold under which the Principle of Competitive Exclusion holds, is proven. For two species systems the following very general result is proven: All solutions of a τ-periodic, dissipative, competitive system are either τ-periodic or approach a τ-periodic solution. A complete description of the geometry of the Poincaré operator of the two species system is given.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00276091
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  • 7
    Electronic Resource
    Electronic Resource
    On optimal intrinsic growth rates for populations in periodically changing environments (1981)
    Springer
    Journal of mathematical biology 12 (1981), S. 343-354 
    Details
    ISSN: 1432-1416
    Keywords: Ecology ; Periodic differential equations ; Optimization
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Mathematics
    Notes: Summary The theory developed here applies to populations whose size x obeys a differential equation, $$\dot x = r(t)xF(x,t)$$ in which r and F are both periodic in t with period p. It is assumed that the function r, which measures a population's intrinsic rate of growth or intrinsic rate of adjustment to environmental change, is measurable and bounded with a positive lower bound. It is further assumed that the function F, which is determined by the density-dependent environmental influences on growth, is such that there is a closed interval J, with a positive lower bound, in which there lies, for each t, a number K(t) for which $$F(K(t),t) = 0$$ and, as functions on J × ℝ, F is continuous, while ∂F/∂x is continuous, negative, and bounded. Because x(t) = 0, 〉 0, or 〈 0 in accord with whether K(t) = x(t), K(t) 〉 x(t), or K(t) 〈 x(t), the number K(t) is called the “carrying capacity of the environment at time t”. The assumptions about F imply that the number K(t) is unique for each t, depends continuously and periodically on t with period P, and hence attains its extrema, K min and K max. It is, moreover, easily shown that the differential equation for x has precisely one solution x * which has its values in J and is bounded for all t in ℝ; this solution is of period p, is asymptotically stable with all of J in its domain of attraction, and is such that its minimum and maximum values, x min * and x max * , obey $$K_{min} \leqslant x_{min}^* \leqslant x_{max}^* \leqslant K_{max}^* .$$ The following question is discussed: If the function F is given, and the function r can be chosen, which choices of r come close to maximizing, x min * ? The results obtained yield a procedure for constructing, for each F and each ɛ 〉 0, a function r such that x min * 〉 K max − ɛ.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00276921
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  • 8
    Electronic Resource
    Electronic Resource
    Life history of the gulf darter, Etheostoma swaini (Pisces: Percidae) (1984)
    Springer
    Environmental biology of fishes 11 (1984), S. 121-130 
    Details
    ISSN: 1573-5133
    Keywords: Ecology ; Habitat ; Feeding ; Age ; Growth ; Reproduction ; Mississippi
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Synopsis Etheostoma swaini, the gulf darter, was collected from the Black Creek drainage in southern Mississippi (February 1978 – April 1979). The gulf darter generally inhabits small- to moderate-size creeks and occurs over a sand or sandy mud bottom, often in association with aquatic vegetation or a layer of organic debris. Larval dipterans were the most important food items, both numerically and volumetrically. Chironomids were found in 71–100% of the stomachs in all except the unusual March 16 collection. The length frequency distribution and the scale annuli analysis indicated there were three year-classes present in the population at any one time. Fifty-one percent of the specimens taken were less than 12 months old. During the mid-February to late March spawning season gulf darters were most often collected over clean gravel or gravelsand substrates. Laboratory observations suggest that the female burrows into the gravel where the demersal, adhesive eggs are deposited. Female gulf darters significantly outnumbered males at a ratio of 59:41.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00002261
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  • 9
    Electronic Resource
    Electronic Resource
    Early development of the northern logperch, Percina caprodes semifasciata, according to the theory of saltatory ontogeny (1984)
    Springer
    Environmental biology of fishes 11 (1984), S. 173-190 
    Details
    ISSN: 1573-5133
    Keywords: Percidae ; Etheostomatini ; Darters ; Ecomorphology ; Embryology ; Ecology ; Early life history
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Synopsis The early development of northern logperch, Percina caprodes semifasciata, was examined from an ecological perspective and in relation to the theory of saltatory ontogeny. Steps, the intervals of relative homeostasis, separated by thresholds, rapid switches to new form and function resulting from canalization of changes in the preceeding step, are described and related to environmental factors. Adaptive shifts in growth allometries provided further evidence of the saltatory nature of ontogeny. Logperch eggs are small (1.2 mm diameter), demersal, and adhesive. The simple embryonic respiratory system reflects high oxygen availability on the lotic spawning grounds. Hatching occurs early, relative to other darters, and free embryos are pelagic. The small free embryos presumably drift downstream to lentic areas, where small planktonic food is more abundant. Logperch are therefore nonguarding, open substrate spawning lithopelagophils and, along with other Percina species, have not advanced from ancestral percid reproductive styles. Percina species have generally remained in ancestral habitats-rivers and lakes. The close correlation between developmental patterns of logperch and environmental factors is therefore interpreted as a restriction based on retention of ancestral characteristics, not as evidence of novel adaptations to new habitats.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00000463
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  • 10
    Electronic Resource
    Electronic Resource
    Production of brook charr and ouananiche in a large rapid, tributary of the Caniapiscau River, northern Quebec (1980)
    Springer
    Environmental biology of fishes 5 (1980), S. 27-32 
    Details
    ISSN: 1573-5133
    Keywords: Salvelinus fontinalis ; Salmo salar (ouananiche) ; Ecology ; Salmonids ; Atlantic salmon
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Synopsis The age structures of brook charr (Salvelinus fontinalis) and ouananiche (Salmo salar) stocks inhabiting a large rapid the river Méo, tributary to the Caniapiscau River were used to compare population stability and production of these species in north central Quebec. The brook chart stock was stable whereas ouananiche showed considerable variation in year class strength. Stock estimates were not significantly different for the two species although the brook charr estimate was 1.5 that of the ouananiche. Production estimates differed by a greater margin because of different growth patterns. Brook chair production was estimated at 19.4 kg ha−1 yr−1. Above age 2+ it was 11.4 kg ha−1 yr−1 which compares with 4.8 kg ha−1 yr−1 for the same age groups of ouananiche.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00000947
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  • 11
    Electronic Resource
    Electronic Resource
    Seasonality in habitat selection by the gold color morph of Cichlasoma citrinellum and its relevance to sympatric speciation in the family Cichlidae (1980)
    Springer
    Environmental biology of fishes 5 (1980), S. 75-78 
    Details
    ISSN: 1573-5133
    Keywords: Cichlid ; Ecology ; Behavior ; Evolution ; Tropics ; Polymorphism ; Central America ; Lake Malawi ; Africa
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Synopsis Cichlasoma citrinellum is a polymorphic species whose individual coloration varies from the dark grey markings typical of the species to yellow, orange, and red. In Lake Jiloá, Nicaragua the depth distribution of these latter, nongrey, golden morphs shows dramatic seasonal variation. In the height of the dry season in February over 50% of the gold morphs occur above 9 m, but as the breeding season approaches they migrate deeper such that less than 7% of the gold population occurs above 9 m at the onset of the breeding season. During the rainy season when breeding occurs most of the gold morphs occur below 15 m. It appears that gold morphs ‘voluntarily’ move into deeper water to breed rather than being aggressively forced deeper by larger, territorial grey morphs as was implied in an earlier paper (McKaye & Barlow 1976). Since the morphs of this species assortatively mate and select different habitats in which to breed, future sympatric splitting of this species is possible. Likely examples of sympatric speciation and of incipient speciation in the family Cichlidae are discussed.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00000953
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  • 12
    Electronic Resource
    Electronic Resource
    Beta diversity of a Gulf of California rocky-shore fish community (1980)
    Springer
    Environmental biology of fishes 5 (1980), S. 109-116 
    Details
    ISSN: 1573-5133
    Keywords: Bay ; Dispersal ; Ecology ; Egg type ; Fish larvae ; Islands ; Points ; Rocky habitats ; Species turnover
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Synopsis Reef fish community composition in three segments of a peninsular rocky shoreline in the Gulf of California was estimated over four periods by visual observation. ‘Point’ and ‘bay’ segments had regular and distinct species compositions over most periods while a ‘middle’ segment was least distinct but consistently had the greatest number of species. Compositional change along the peninsula was least regular during the coldest sea temperature period (April). Mean species turnover between segments was highest between point and bay. Within segments, the point had greater compositional predictable composition (lowest species turnover). When species with regular frequency of encounter were classified into ‘point’, ‘middle’, ‘bay’, and ‘no trend’ groups it was found that comparatively more ‘point’ species had pelagic eggs and comparatively more ‘bay’ species had demersal eggs. Beta diversity of rocky-shore fishes along the physical gradient of the Punta Doble peninsula reflects a transition between exposed and protected rocky shoreline communities. The correlated physical environmental characteristics associated with exposed and protected habitats are discussed in relation to diversity regulation and dispersal strategies in reef fishes.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF02391618
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  • 13
    Electronic Resource
    Electronic Resource
    Analysis of temporal changes in fish assemblages in Serpentine Creek, Queensland (1980)
    Springer
    Environmental biology of fishes 5 (1980), S. 117-133 
    Details
    ISSN: 1573-5133
    Keywords: Cycles ; Communities ; Diversity ; Ecology ; Estuary ; Multiple regressions ; Oceanography ; Salinity ; Seasons ; Time-series analysis
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Synopsis From November 1975 to April 1977 nocturnal dermersal fish were sampled fortnightly at ten sites in Serpentine Creek using a three meter beam trawl with a 3.2 cm mesh net. Forty-five species from thirty-four families were obtained totalling 14 518 individuals with the six most abundant species comprising approximately 72% of the catch. Using multiple regression techniques with Fourier transformations, the mean number of species (S) and abundance (N) of all fish were found to conform to a regular annual cyclical pattern with maxima in April and May. A trend toward declining abundances of individuals and species was present. Shannon (H′) and Gleason (G) diversity indices showed no regular seasonal trends and are considered poor indicators of pollution. In comparison with other estuarine studies at different latitudes Serpentine Creek conforms to the theory that more tropical waters have the greatest faunal diversity. Seventeen of the 22 most abundant species demonstrated a regular annual cycle of abundance. The number of species, abundance and diversity measures were greatest about 1 km from the mouth of the creek and gradually declined upstream. This was the region with highest macrobenthos diversity and with the most stable abiotic values. Temperature and/or salinity were positively correlated with the abundance of eleven species. The species were placed in five groups according to their periodic characteristics. The proportion of ‘resident’ species was low and this is consistent with Tyler's (1971) theory of temperature stabilized fish assemblages. The known biology of six species is related to their occurrence. Salinity and temperature values in the creek exhibit an annual cycle which preceeds that of Bramble Bay by approximately one month. Rainfall in the watershed was correlated with observed salinity values. It is postulated that salinity is the common feature between temperate and tropical estuaries in the maintenance of community cycles.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF02391619
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  • 14
    Electronic Resource
    Electronic Resource
    The lack of changes in nocturnal estuarine fish assemblages between new and full moon phases in Serpentine Creek, Queensland (1981)
    Springer
    Environmental biology of fishes 6 (1981), S. 213-218 
    Details
    ISSN: 1573-5133
    Keywords: Australia ; Communities ; Cycles ; Diversity ; Ecology ; Estuary ; Lunar periodicity ; Migration ; Sub-tropics ; Tides
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Synopsis A series of 10 sites were sampled at new and full moon phases in a vertically homogenous estuary, Serpentine Creek, Queensland, Australia. Forty-five species (14,518 individuals) were caught and analysed using standardized Shannon & Gleason diversity indices, and total number of species and individuals. The coefficients of variation for these values were greater for times than for sites. There were no significant differences between 14 pairs of new and full moon phases fort,t,t, andt, or between mean number of individuals for the 16 most abundant species. If significant variations do exist within months, then experiments should be done between spring and neap tides as this study found no differences between the spring tides associated with new and full moon phases.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00002786
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  • 15
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    Production ecology in the Northern Baltic (1981)
    Springer
    Hydrobiologia 76 (1981), S. 87-96 
    Details
    ISSN: 1573-5117
    Keywords: Ecology ; production ; Gulf of Bothnia ; pelagial ; benthos
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Abstract Production biology in the Bothnian Bay is discussed and compared to that of the southern parts of the Baltic. Severe ice-conditions, low water temperatures in spring and early summer and a pronounced water-colouring cause a delay of the spring development of phytoplankton and a low annual production in the Bothnian Bay. This delay makes possible a higher efficiency of the pelagic system as the zooplankton fauna can develop in harmony with the food resources. The downward transport of energy and matter to the bottom communities from an efficient pelagial should be small and temporally unpredictable, which is thought to be an adequate explanation of the observed very low benthic fauna biomasses in the Bothnian Bay.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00014038
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  • 16
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    Electronic Resource
    Ecology of sessile rotifers (1980)
    Springer
    Hydrobiologia 73 (1980), S. 181-193 
    Details
    ISSN: 1573-5117
    Keywords: Ecology ; feeding ; invertebrate behavior ; larval biology ; Rotifer ; sessile rotifer ; substrate-dependent survivorship ; substrate selection
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00019445
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  • 17
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    Early development of the rainbow darter, Etheostoma caeruleum, according to the theory of saltatory ontogeny (1984)
    Springer
    Environmental biology of fishes 11 (1984), S. 277-299 
    Details
    ISSN: 1573-5133
    Keywords: Percidae ; Etheostomatini ; Ecomorphology ; Embryology ; Ecology ; Early life history ; Heterochrony
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Synopsis The early development of rainbow darter, Etheostoma caeruleum, was examined from an ecological perspective. Steps and thresholds of ontogeny to completion of body squammation are defined, and related to environmental factors. Rainbow darter eggs are about 2 mm diameter, considerably larger than those of related logperch (Percina caprodes). The embryonic vitelline respiratory plexus is much more extensive. The pelagic interval characteristic of logperch and ancestral percids is eliminated and onset of exogenous feeding is delayed. The larger larvae of the rainbow darter can begin feeding directly on aquatic insects, and complete their life cycle in streams. Therefore, shifts in the timing of important thresholds (e.g. exogenous feeding) are ecologically important. Furthermore, early maturation and/or delayed bone and scale formation may be responsible for reductions in the lateralis system and scalation in this and other darter species.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00001375
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  • 18
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    Prevalence and intensity ofCapillaria catostomi (Nematoda: Trichuroidea) in white sucker (Catostomus commersoni) in southern Lake Huron, Canada (1980)
    Springer
    Environmental biology of fishes 5 (1980), S. 267-271 
    Details
    ISSN: 1573-5133
    Keywords: Fish ; Nematode ; Populations ; Life cycle ; Host factors ; Ecology ; Parasites
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Synopsis A total of 314 white suckers (Catostomus commersoni) taken monthly during May to December 1975 and in April and May 1976 from southern Lake Huron, Ontario, Canada, were examined forCapillaria catostomi. Prevalence determined from fresh white suckers (66%) was significantly lower than from frozen white suckers (81%). However, there was no significant difference in prevalence ofC. catostomi in samples taken at monthly intervals; in male and female white suckers; or in the age categories. Mean intensity of infection was not significantly different in fresh (9.6 [± 13.41]) or frozen (10.4 [± 13.11]) white suckers. There was no significant difference in intensities between monthly samples in male and female white suckers or in the age categories. Suckers were infected with 1–172 worms. The percentage of male, female and immature worms did not change with sex or age of host or by month. The frequency distribution showed the parasites were overdispersed. A possible life cycle forC. catostomi involving an oligochaete intermediate host is discussed and an attempt made to explain the almost constant levels of prevalence and intensity.
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    URL: http://dx.doi.org/10.1007/BF00005362
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  • 19
    Electronic Resource
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    Reproductive tactics of the Asian cichlids of the genusEtroplus in Sri Lanka (1981)
    Springer
    Environmental biology of fishes 6 (1981), S. 95-103 
    Details
    ISSN: 1573-5133
    Keywords: Behavior ; Ecology ; Parental care ; Reproductive cycles ; Colonial nesting ; Etroplus maculatus ; Etroplus suratensis
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Synopsis The Asian cichlids,Etroplus maculatus (the orange chromide) and E. suratensis (the green chromide) in Sri Lanka reproduce twice during the year when water conditions are favorable for nest construction and maintaining visual contact with offspring. These are the drier premonsoonal and monsoonal seasons when water turbidity decreased and salinity increased. When breeding in isolation orange chromide pairs selected dense vegetation where nests were camouflaged. During the peak breeding cycle (July) orange chromide pairs selected sparse vegetation for nesting as a compromise between survival of young and availability of adult food. These areas were also occupied by foraging non-breeding conspecifics which increased the threat of cannibalism of offspring. Under these pressures most orange chromides nested in colonies which helped decrease both actual and attempted cannibalism. The sympatric green chromide does not forage during nesting and nest site selection was determined mainly by factors favoring offspring survival. Biparental care is exhibited by both species. One member of an orange chromide pair stands guard over offspring while the other leaves the territory to forage — their roles are reversed every few minutes. The total parental investment is equivalent to the full investment of a single parent. Monogamy appears to be maintained by their metabolic constraints. In the green chromide both parents are vigilant over offspring and neither forages thus spending twice as much time in parental investment.
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    URL: http://dx.doi.org/10.1007/BF00001803
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    Fluctuations in the muskellunge (Esox masquinongy Mitchill) population of Chautauqua Lake, New York (1981)
    Springer
    Environmental biology of fishes 6 (1981), S. 207-211 
    Details
    ISSN: 1573-5133
    Keywords: Fish ; Ecology ; Population density ; Exploitation ; Tagging ; Catch per effort
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Synopsis Population and exploitation estimates were made from angler recaptures of Chautauqua Lake muskellunge,Esox masquinongy Mitchill. Fish were tagged during Conservation Department studies in 1941–1946, 1961–1965 and 1976–1978. Population estimates of adult fish ranged from one to seven fish per hectare and angler exploitation rates of tagged fish fluctuated from 3.8% to 14.1%. Relative catch indicators suggest a major decline in the lake's muskellunge population during the last decade. Overexploitation, habitat alteration and interspecific competition with recently introduced fish species were cited as probable causes of the decline.
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    URL: http://dx.doi.org/10.1007/BF00002785
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    Progress report on the eel expedition of R.V. ‘Anton Dohrn’ and R.V. ‘Friedrich Heincke’ to the Sargasso Sea 1979 (1981)
    Springer
    Environmental biology of fishes 6 (1981), S. 371-375 
    Details
    ISSN: 1573-5133
    Keywords: Anguilliformes ; Anguillidae ; Leptocephalus ; Fish larvae ; Horizontal distribution ; Vertical distribution ; Spawning area ; Migration ; Ultrasonic tracking ; Hydrography ; Ecology ; North Atlantic ; Anguilla anguilla ; A. rostrata
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Synopsis This report presents preliminary results of the 1979 Sargasso Sea expedition from February to May 1979. Information is given on horizontal and vertical distribution of eel larvae and adults, adult eel tracking and pelagic trawling. Related matters such as electrophoretic studies on anguilliform larvae, feeding of eel larvae, predation on leptocephali, occurrence of other anguilliform larvae and hydrography are mentioned.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00005768
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    Resiliency of reef fish communities in the Florida Keys following a January 1977 hypothermal fish kill (1983)
    Springer
    Environmental biology of fishes 9 (1983), S. 41-53 
    Details
    ISSN: 1573-5133
    Keywords: Artificial reefs ; Competition ; Intermediate disturbance ; Ecology ; Mortality ; Predation ; Recruitment ; Stability
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Synopsis In January 1977, a record breaking cold spell caused fish kills at Big Pine Key, Florida. Census data collected before and after the cold spell from a series of model reefs constructed in 1975 showed a significant drop in mean number of reef fish species and individuals. Following this disturbance, high recruitment of juveniles occurred, presumably due to reduced competition, predation, or a combination of these. Model and natural patch reef communities examined the summer following the cold spell (1977) were significantly different from those examined the summer before (1976) and the second summer following the cold spell (1978). During the summer of 1977, a significantly smaller mean fish size and a significantly greater mean number of species and individuals were observed. Increased species richness following the cold spell is consistent with the intermediate disturbance hypothesis. Contrary to some theoretical predictions, results suggest reef fish communities are highly resilient to some regional disturbance.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00001057
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    Field observation on death feigning: a unique hunting behavior by the predatory cichlid, Haplochromis livingstoni, of Lake Malawi (1981)
    Springer
    Environmental biology of fishes 6 (1981), S. 361-365 
    Details
    ISSN: 1573-5133
    Keywords: Mimicry ; Shamming death ; Africa ; Fish ; Chafing ; Predation ; Ecology ; Cyrtocara
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Synopsis Haplochromis (=Cyrtocara) livingstoni, one of the predatory cichlids of the sand community of Lake Malawi, Africa, occurs at a density of 1.3 individuals per hectare. They are territorial, defending areas 15 m wide by 40 m long along the interface of sand andVallisneria weed beds. Individuals use a ‘death feigning’ hunting pattern to capture prey. From a position of lying on their sides semiburied in the sand, these fish attack small cichlids. During four hours of SCUBA observations three successful attacks from this position were seen. After an attack the small cichlids scatter and the predator moves on toward a new aggregation of fish where it again plays dead. Individuals feign death an average of seven times per thirty minutes watch. Death feigning behavior is initiated in two ways. The fish either 1) is stationary with its ventral surface on or close to the sand, and then falls onto its side, or 2) drops from the water colum into `lying on side' position. The initial behavioral actions of the latter method are similar to chafing behavior. But instead of chafing the sand and rising again off the bottom, the fish plows into the sand and remains immobile. These data further add to the evidence that cichlids are remarkably flexible in their feeding behavior.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00005766
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    Patterns of abundance variation in reef fishes near an artificial reef at Guam (1982)
    Springer
    Environmental biology of fishes 7 (1982), S. 121-136 
    Details
    ISSN: 1573-5133
    Keywords: Seasonality ; Predator-prey ; Predator interference ; Turnoverrate ; Diversity ; Ecology
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Synopsis Development of the fish community on a submerged 16 m barge and variation in fish abundance on nearby transects were surveyed twice monthly for twenty months. A steady increase in abundance was observed for certain fishes on the barge, whereas a few species exhibited distinct seasonal variation on both the barge and transects. Most of the seasonal species settled between March and May. Some seasonal species appeared to be site selective in their settlement and consequently settled juveniles were clumped in their distribution. An abundance of preferred topographical features may be why settlement was relatively high at the study site and indirectly why predators became significantly (r3 = 7.67***, N = 37) more abundant at the study area during the months of maximum prey settlement. Concurrent settlement of several species during the same few months may be important because juveniles become an abundant food source to predators during those few months only. Periodic swamping of predators by abundant juvenile prey may improve the chances for individuals of rarer prey species to be overlooked and therefore be succesfully recruited.
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    URL: http://dx.doi.org/10.1007/BF00001782
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    Thermoregulatory behavior and diel activity of yearling winter flounder, Pseudopleuronectes americanus (Walbaum) (1982)
    Springer
    Environmental biology of fishes 7 (1982), S. 177-180 
    Details
    ISSN: 1573-5133
    Keywords: Temperature ; Behavior ; Ecology ; Fisheries ; Fish ; Marine juveniles
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Synopsis Sixteen yearling winter flounder, tested individually for 3-day periods in electronic shuttleboxes, voluntarily occupied an 8–27°C range of temperature, with a modal final thermal preferendum of 18.5°C (mean 18.7°C, median 19°C, midpoint 17.5°C, s.d. 1.9°C, S k + 0.33). The locomotor activity pattern of the yearling fish in the laboratory was markedly nocturnal, with mean hourly nocturnal activity exceeding mean hourly diurnal activity by a factor of 3.4. Maximum activity occurred at 0300 EST, minimum activity at 1400 EST. While activity generally increased with temperature, a local activity minimum occurred at 18.7°C, coinciding with the 24-hour mean final thermal preferendum. Comparison of these laboratory data with previously published field data suggest that behavioral responses to temperature and light play significant roles in determining age- and size-specific differences in seasonal depth stratification and onshore-offshore distributions in this species.
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    URL: http://dx.doi.org/10.1007/BF00001789
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    Nematodes (Longidorus sp. andTylenchorhynchus microphasmis loof) in growth and nodulation of sea buckthorn (Hippophaë rhamnoides L.) (1983)
    Springer
    Plant and soil 73 (1983), S. 141-147 
    Details
    ISSN: 1573-5036
    Keywords: Actinorhizas ; (Actinomycetes) ; Ecology ; Hippophaë ; (Mystiflora: Elaeagnaceae) ; Longidorus ; (Nematoda: Longidoridae) ; Nodulation ; Soil ; sterization ; Vegetational succession ; Tylenchorhynchus (Nematoda: Tylenchrohynchidae)
    Source: Springer Online Journal Archives 1860-2000
    Topics: Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition
    Notes: Summary Hippophaë rhamnoides seedlings were grown in sterilized and unsterilized soil from a decliningH. rhamnoides scrub, to which different numbers ofLongidorus sp. andTylenchorhynchus microphasmis were added. In sterilized and unsterilized soil, retardation of growth, content of dry matter in the shoots, and incidence of deformed short lateral roots of test plants were positively correlated with counts of both nematode species. Nitrogen content in the shoots, nodulation on the roots of test plants and increase increase in nematodes were negatively correlated with the initial number of both nematode species in sterilized soil. In unsterilized soil, an unknown biotic factor was present that reduces growth ofH. rhamnoides, nodulation and multiplication of the nematodes. This factor seems to interact with the nematodes in reducing growth ofH. rhamnoides.
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    URL: http://dx.doi.org/10.1007/BF02197763
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    Effects of crop rotation and fertilization on catalase activity in a soil of the southeastern United States (1982)
    Springer
    Plant and soil 69 (1982), S. 97-104 
    Details
    ISSN: 1573-5036
    Keywords: Catalase ; Ecology ; Fertilizers ; H2O2∶H2O2 oxidoreductase ; Rhizosphere effects ; Soil enzymes
    Source: Springer Online Journal Archives 1860-2000
    Topics: Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition
    Notes: Summary Catalase activity of a loamy sand under a 3-year crop rotation in the southeastern U.S.A. was monitored. Corn (Zea mays L.), cotton (Gossypium hirsutum L.), and soybean [Glycine max (L.) Merr.] were the summer crops in the rotation. Winter wheat (Triticum aestivum L.) was planted after corn, and soybean was followed by a winter fallow period. Cotton was followed by a mixture of common vetch (Vicia sativa L.) and crimson clover (Trifolium incarnatum Gibelli & Belli) which was eventually plow-incorporated as a green manure. Highest mean catalase activities were recorded in soil under the wheat, soybean, and winter legume crops; lowest activities were found in soil bearing corn and cotton, and during the winter fallow period. The fertilization regime influenced soil catalase activity independently of the crop. Soil deficient in any of the major elements showed low enzyme activity. Highest activity was found in soil fertilized with P and K, and with N supplied by a winter legume crop. Addition of supplementary mineral nitrogen to this regime reduced catalase activity. Elimination of the winter legume crop from an otherwise complete fertilization regime resulted in a drastic reduction in enzyme activity. In soil receiving a complete fertilization regime there was a close correlation between soil catalase and xylanase activities. A similar correlation between these two enzymes was not found in soil receiving incomplete fertilization.
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    URL: http://dx.doi.org/10.1007/BF02185708
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    Frankia growth and activity as influenced by water potential (1982)
    Springer
    Plant and soil 69 (1982), S. 293-297 
    Details
    ISSN: 1573-5036
    Keywords: Ecology ; Frankia ; Nitrogen fixation ; Water potential
    Source: Springer Online Journal Archives 1860-2000
    Topics: Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition
    Notes: Summary Growth responses of Frankia isolates to decreasing water potential were monitored in systems where potentials were controlled by KCl, NaCl and Polyethylene glycol. The highest potential tested was −2 bar (basal medium). The general pattern emerging was that isolates fromAlnus glutinosa, A. viridis andComptonia peregrina showed declining growth at potentials below −2 to −5 bar. AMyrica gale isolate showed declining growth with decreasing potential. All isolates were more sensitive to decreases in potential in a matric controlled than an osmotic controlled system. They all showed approximately 50 percent growth reduction at −5 to −8 bar, and meagre growth at −16 bar after 35 days. The Comptonia isolate was the most vigorous at low potentials. Nitrogen fixation ability was monitored for two isolates. Highest specific activities were observed between −3 and −5 bar for the Myrica isolate and between −5 and −7.5 bar for theA. glutinosa isolate.
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    Occurrence and infective potential of the endophyte ofHippophaë rhamnoides L. ssp.rhamnoides in coastal sand-dune areas (1980)
    Springer
    Plant and soil 56 (1980), S. 123-139 
    Details
    ISSN: 1573-5036
    Keywords: Actinorhizas ; Ecology ; Endophyte distribution ; Hippophaë rhamnoides ; Infective potential ; Nodulation ; Root nodules
    Source: Springer Online Journal Archives 1860-2000
    Topics: Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition
    Notes: Summary The infective potential (IP) of nodule homogenates from field-grownHippophaë rhamnoides L. ssp.rhamnoides was determined by counting the number of nodules formed on test plants after inoculation with various dilutions of the homogenates. The IP was almost constant,i.e. 105 to 106 per gram of fresh nodule material. Methods to store nodule material without loss of IP were tested. The IP of air-dried nodule powders stored at 6°C hardly decreased during a period of more than a year. Data are presented on the IP of soil samples from sites representing various stages of dune formation. BeforeH. rhamnoides appeared, the IP was low: 1 to 36 nodules were formed on test plants per kg of soil. This low IP was due to low numbers of infective endophyte particles in these soils. During the succession of theH. rhamnoides scrub, the IP of the soil increased, due to the increase in the number of endophyte particles in the soil. Gradually, however, nodulation was limited by other environmental factors. The nature of these factors is discussed.
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    Factors affecting growth and nodulation ofHippophaë rhamnoides L. ssp.Rhamnoides in soils from two successional stages of dune formation (1981)
    Springer
    Plant and soil 63 (1981), S. 317-331 
    Details
    ISSN: 1573-5036
    Keywords: Actinorhizas ; Ecology ; Gamma irradiation ; Hippophaë rhamnoides ; Longidorus ; Nematode ; Nodulation ; Root nodules ; Soil sterilization ; Succession
    Source: Springer Online Journal Archives 1860-2000
    Topics: Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition
    Notes: Summary To explain the decline of Hippophaë scrub in the vegetation succession in the dunes of The Netherlands, the growth and nodulation of Hippophaë plants grown in pots, using soil from an early stage (site AH) and a post-optimum stage (site HP), were investigated. In HP-soil nodulation, yield, and the nitrogen and phosphorus content of test plants were always lower and the number of necrotic nodules and the dry matter content were always higher than in AH-soil, even after inoculation with crushed nodules and the addition of a nutrient solution. Plants in HP-soil also had darker roots, less root hairs, a higher number of short lateral roots and a higher percentage of dead roots than those in AH-soil. These characteristics of adverse growth conditions disappeared upon ignition or gamma-irradiation of HP-soil. Possible explanations of these results are discussed. The degeneration of Hippophaë scrub cannot be ascribed to the age of the plants, the absence of sufficient infective endophyte particles or to abiotic factors such as unfavourable physical (particle size) or chemical soil conditions but is caused by biotic factors. No indications were obtained that plant-pathogenic fungi and bacteria are involved. HP-soil in contrast to AH-soil, however, contained large numbers of the nematodeLongidorus sp., a species known to cause root deformations. The conclusion was that this nematode is one of the biotic factors involved in the degeneration of the Hippophaë scrub. This degeneration is due to a restriction of the root system resulting in a low phosphate uptake, a low nodulation capacity and, as a consequence, a low nitrogen content. The results demonstrate that biotic soil factors are important in influencing succession in higher plant communities.
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    Populations ofRhizobium japonicum associated with the surfaces of soil-grown roots (1981)
    Springer
    Plant and soil 61 (1981), S. 71-80 
    Details
    ISSN: 1573-5036
    Keywords: Ecology ; Fluorescent antibody ; Immunofluorescence ; Rhizobium japonicum ; Rhizosphere ; Root surfaces ; Soybean
    Source: Springer Online Journal Archives 1860-2000
    Topics: Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition
    Notes: Summary Populations of nativeRhizobium japonicum 123 in the rhizospheres of field and pot grown plants as determined by immunofluorescence were calculated on the basis of root surface area. The density ofR. japonicum 123 on the root fluctuated between a few hundred to over a thousand per square centimeter of root surface. As root volume expanded rapidly, the Rhizobium density fell to less than one hundred per unit area. There was no appreciable effect due to different plant, nitrogen amendment, or addition of another strain ofR. japonicum, on the surface density of the nativeR. japonicum population on roots. Nor did the native population influence the added strain. Direct examination of root surface segments revealed that naturalized rhizobia existed sparsely on root surfaces in the form of short rods. They were observed to be attached sideways or in a polar manner on root hairs, epidermal cells, and at junctions of tap and lateral roots. There was no evidence of specific stimulation of the homologous Rhizobium by the host plant as a prelude to nodulation.
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    The determination of soil chitinase activity: Conditions for assay and ecological studies (1983)
    Springer
    Plant and soil 75 (1983), S. 95-106 
    Details
    ISSN: 1573-5036
    Keywords: Chitin ; Chitinase ; Chitinglycanohydrolase ; E. C. 3.2.1.14 ; Ecology ; Fertilizers ; Rhizosphere effects ; Soil enzymes
    Source: Springer Online Journal Archives 1860-2000
    Topics: Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition
    Notes: Summary Chitinase activity was determined by incubating a mixture of toluene-treated soil with 1% (w/w) colloidal chitin suspension for 18 h at 37°C and then, after dilution, assaying the amount of N-acetyl-glucosamine released. Maximal chitinase activity was observed at 45°C and optimal pH for enzymatic reaction was 5.0–5.5. Soil chitinase activity decreased with increasing soil depth and was significantly affected by crop cover and fertilization regime. Chitin added to soil stimulated chitinase activity. Enzyme activity was correlated with the soil fungal population but not with numbers of actinomycetes or bacteria. A specialized mycoflora was associated with chitin decomposition.
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    Über den thermischen Zerfall der Metallborfluorid-Ammoniakate (1935)
    Weinheim : Wiley-Blackwell
    Zeitschrift für anorganische Chemie 221 (1935), S. 225-248 
    Details
    ISSN: 0863-1786
    Keywords: Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: Der thermische Zerfall der Metallborfluorid-Ammoniakate wurde eingehend untersucht. Dabei wurde festgestellt, das nur das Cd(NH3)6(BF4)2 und das ihm entsprechende neu hergestellte Zn(NH3)6(BF4)2 reversibel Ammoniak unter Bildung der entsprechen- den Tetramminsalze abzuspalten vermögen. Bei weiterem Abbau zerfallen diese Tetramminsalze ebenso wie Ni(NH3)6(BF4)2 in irreversibler Reaktion, wobei Metallfluorid, Ammoniak und ein als Sublimat auftretendes Kondensationsprodukt BF3 · NH3 entstehen. Der Zerfall erfolgt nach dem allgemeinen Schema: Me(NH3)x(BF4)2 → MeF2 + 2BF3 · NH3 + (x - 2) NH3, wobei für das Nickelsalz x = 6, für das Cadmium- und Zinksalz x = 4 zu setzen ist. Der Abbau des Cr(NH3)6(BF4)3 verlüuft analog unter Bildung von CrF3 · Das Co(NH3)6(BF4)3 erleidet beim thermischen Zerfall eine teilweise „Selbstreduktion“, es entsteht dabei CoF2, die Reaktion verläuft folgendermaßen: 3CO(NH3)6(BF4)3 → 3COF2 + 6BF3NH3 + 3BF4NH4 + 8NH3 + N2/2. Beim Abbau des Ag(NH3)BF4 führt die „Selbstreduktion“ quantitativ zum metallischen Silber nach: Ag(NH3)2BF4 → 3Ag + 3NH4BF4 + 2NH3 + N2/2.
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    Über den Mechanismus von Fällungsvorgängen. XV. Vorgänge, welche beim Fällen von Ba″-, Pb″- oder SO4″-Ionen als Bariumsulfat oder als Bleisulfat verlaufen (1935)
    Weinheim : Wiley-Blackwell
    Zeitschrift für anorganische Chemie 221 (1935), S. 369-381 
    Details
    ISSN: 0863-1786
    Keywords: Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Additional Material: 5 Tab.
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    URL: http://dx.doi.org/10.1002/zaac.19352210409
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    Beiträge zur analytischen Chemie des Rheniums. 11. Über die maßanalytische Bestimmung der Wertigkeit von Rheniumverbindungen (1935)
    Weinheim : Wiley-Blackwell
    Zeitschrift für anorganische Chemie 222 (1935), S. 56-64 
    Details
    ISSN: 0863-1786
    Keywords: Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Additional Material: 5 Tab.
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    URL: http://dx.doi.org/10.1002/zaac.19352220107
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    Magnetochemische Untersuchungen. XIII. Die Fluoride von Kupfer, Nickel und Kobalt (1935)
    Weinheim : Wiley-Blackwell
    Zeitschrift für anorganische Chemie 222 (1935), S. 73-77 
    Details
    ISSN: 0863-1786
    Keywords: Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Additional Material: 2 Ill.
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    URL: http://dx.doi.org/10.1002/zaac.19352220111
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    Über den Reaktionsverlauf von Substitutionen an Borhalogeniden 4. Mitteilung: Die Einwirkung von Halogenwasserstoffen und -alkylen auf Borhalogenide (1935)
    Weinheim : Wiley-Blackwell
    Zeitschrift für anorganische Chemie 222 (1935), S. 98-106 
    Details
    ISSN: 0863-1786
    Keywords: Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Additional Material: 1 Ill.
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    URL: http://dx.doi.org/10.1002/zaac.19352220115
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    Nachweis geringster Sauerstoffmengen durch Phosphoreszenztilgung (1935)
    Weinheim : Wiley-Blackwell
    Zeitschrift für anorganische Chemie 222 (1935), S. 126-134 
    Details
    ISSN: 0863-1786
    Keywords: Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Additional Material: 1 Ill.
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    URL: http://dx.doi.org/10.1002/zaac.19352220203
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    Über Mischkristalle in der Vitriolreihe. IV (1935)
    Weinheim : Wiley-Blackwell
    Zeitschrift für anorganische Chemie 221 (1935), S. 423-426 
    Details
    ISSN: 0863-1786
    Keywords: Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Additional Material: 1 Ill.
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    URL: http://dx.doi.org/10.1002/zaac.19352210414
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    Über die Primärreaktion der Metalloxyde mit festem Kohlenstoff (1935)
    Weinheim : Wiley-Blackwell
    Zeitschrift für anorganische Chemie 222 (1935), S. 189-200 
    Details
    ISSN: 0863-1786
    Keywords: Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: Zusammenfassend kann mithin festgestellt werden, daß aus der Reaktion der Metalloxyde rnit Kohlenstoff sowohl Kohlensäure als auch Kohlenoxyd entstehen können. Das Mischungsverhältnis der beiden Gase wird im wesentlichen durch den Sauerstoffdruck bzw. die Reduzierbarkeit des Metalloxydes dergestalt bestimmt, daß ein Oxyd rnit jeweils höherem Sauerstoffdruck baw. größerer Reduzierbarkeit einen größeren Gehalt an CO2 im Reaktionsgas liefert. Oxyde von der Reduzierbarkeit der Kupfer- oder Bleioxyde liefern bereits praktisch 100% Kohlensäure, so daß hier Umsetzungen nach der Art CuO + C = Cu + CO eine untergeordnete Rolle spielen. Die Tatsache, daß freiwillig Sauerstoff abgebende Oxyde wie MnO2 usw. den Kohlenstoff primär zu CO2 verbrennen, bildet eine weitere Stütze für die Anschauung, daß auch die Verbrennung des Kohlenstoffes an der Luft primär zu CO2 führt.
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    URL: http://dx.doi.org/10.1002/zaac.19352220209
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    Zur elektrolytischen Reduktion des Sauerstoffes zu Wasserstoffsuperoxyd (1935)
    Weinheim : Wiley-Blackwell
    Zeitschrift für anorganische Chemie 223 (1935), S. 199-203 
    Details
    ISSN: 0863-1786
    Keywords: Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Additional Material: 1 Ill.
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    URL: http://dx.doi.org/10.1002/zaac.19352230213
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    Komplexsalze des Brechweinsteins (1935)
    Weinheim : Wiley-Blackwell
    Zeitschrift für anorganische Chemie 221 (1935), S. 367-368 
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    ISSN: 0863-1786
    Keywords: Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/zaac.19352210408
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    Die Änderung der Adsorption von Farbstoffen an Nickeldrähten beim Übergange der Nickeldrähte vom harten in den weichen Zustand (1935)
    Weinheim : Wiley-Blackwell
    Zeitschrift für anorganische Chemie 223 (1935), S. 222-224 
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    ISSN: 0863-1786
    Keywords: Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Additional Material: 1 Ill.
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    URL: http://dx.doi.org/10.1002/zaac.19352230306
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    Die Fluoreszenz von Zinkoxyd-Eisenoxyd-Mischpräparaten und ihre Abhängigkeit von der Temperatur der Wärmebehandlung (1935)
    Weinheim : Wiley-Blackwell
    Zeitschrift für anorganische Chemie 223 (1935), S. 251-252 
    Details
    ISSN: 0863-1786
    Keywords: Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Additional Material: 1 Tab.
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    URL: http://dx.doi.org/10.1002/zaac.19352230310
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    Magnetochemische Untersuchungen. XII. Das Magnetische Verhalten einiger flüchtiger Fluoride (1935)
    Weinheim : Wiley-Blackwell
    Zeitschrift für anorganische Chemie 222 (1935), S. 70-72 
    Details
    ISSN: 0863-1786
    Keywords: Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Additional Material: 1 Tab.
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    URL: http://dx.doi.org/10.1002/zaac.19352220110
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  • 46
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    Katalyse der Wasserstoffsuperoxydzersetzung durch Eisensulfat und Natriumwolframat (1935)
    Weinheim : Wiley-Blackwell
    Zeitschrift für anorganische Chemie 222 (1935), S. 81-91 
    Details
    ISSN: 0863-1786
    Keywords: Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: Es wurde die Kinetik des Zerfalls von H2O2 unter den gleichzeitigen Einflüssen zweier Katalysatoren  -  FeSO4 und Na2WO4 - untersucht, was zu folgenden Ergebnissen führte:1. Die Anfangskonzentration des H2O2, die bei Anwendung jedes der beiden Katalysatoren, einzeln genommen, ohne Einfluß ist, macht sich bei ihrer gleichzeitigen Anwesenheit, namentlich im Anfangsstadium, bemerkbar.2. Das Na2WO4 vergrößert die Zerfallsgeschwindigkeit des H2O2 unter dem Einfluß von FeSO4 allein. Die Addition von 0,008 g/Mol pro Liter Na2WO4 vergrößert die Geschwindigkeit um das Achtfache; bei weiterer Zugabe von Na2WO4 ist dessen Einfluß weniger ausgesprochen.3. In saurer Lösung übt Na2WO2 praktisch keine katalytische Wirkung auf den H2O2-Zerfall aus. Bei Zugabe von FeSO4 erfährt die Reaktion eine merkliche Beschleunigung und geht mit messbarer Geschwindigkeit vor sich. Die Konzentrationsvergrößerung des FeSO4 hat eine, dieser Vergrößerung ungefähr proportionale, Vergrößerung der Geschwindigkeit zur Folge.
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    Notiz über die Angreifbarkeit von Calciumphosphaten durch Kohlensäure (1935)
    Weinheim : Wiley-Blackwell
    Zeitschrift für anorganische Chemie 223 (1935), S. 422-426 
    Details
    ISSN: 0863-1786
    Keywords: Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: Es wurde untersucht, ob die Behandlung von Calciumphosphaten mit H2O und CO2 unter Druck bei Raumtemperatur bzw. 120 oder 170° C zu einer Erhöhung des Gehalts an citratlöslicher Phosphorsäure führt. Innerhalb der angewandten Bedingungen ist ein solcher Einfluß nur in sehr geringem Umfang vorhanden; auch Zusätze von K- bzw. NH4-Salzen sind fast unwirksam
    Additional Material: 1 Tab.
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    URL: http://dx.doi.org/10.1002/zaac.19352230415
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  • 48
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    Masthead (1935)
    Weinheim : Wiley-Blackwell
    Zeitschrift für anorganische Chemie 224 (1935) 
    Details
    ISSN: 0863-1786
    Keywords: Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/zaac.19352240101
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  • 49
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    Über den Mechanismus von Fällungsvorgängen. XVI. Zur Kenntnis des KMnO4-haltigen BaSO4 (1935)
    Weinheim : Wiley-Blackwell
    Zeitschrift für anorganische Chemie 222 (1935), S. 249-256 
    Details
    ISSN: 0863-1786
    Keywords: Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Additional Material: 1 Tab.
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    URL: http://dx.doi.org/10.1002/zaac.19352220305
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  • 50
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    Die Dichten wäßriger Borsäurelösungen und das scheinbare Molekularvolumen von H3BO3 in derselben (1935)
    Weinheim : Wiley-Blackwell
    Zeitschrift für anorganische Chemie 222 (1935), S. 285-288 
    Details
    ISSN: 0863-1786
    Keywords: Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: 1. Die Dichten wäßriger Borsäurelösungen wurden bei verschiedenen Temperaturen gemessen und daraus einige thermische Ausdehnungskoeffizienten dieser Lösungen berechnet.2. Es wurden die scheinbaren Molekularvolumina von Borsäure in wäßrigen Lösungen aus verschiedenen Dichtemessungen berechnet. Aus den Berechnungen ergab sich das Resultat, daß erstens alle älteren Dichtebestimmungen nicht genügend genau sind, zweitens, daß die Borsäure sich in wäßriger Lösung zwischen den Konzentrationen 0,l Mole/Liter und gesättigter Lösung als fast idealer Nichtelektrolyt verhält. Ein Minimum bei etwa 0,25 Mole/Liter ist noch fraglich.
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    URL: http://dx.doi.org/10.1002/zaac.19352220308
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    Masthead (1935)
    Weinheim : Wiley-Blackwell
    Zeitschrift für anorganische Chemie 222 (1935) 
    Details
    ISSN: 0863-1786
    Keywords: Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/zaac.19352220401
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    Magnetochemische Untersuchungen. XV. Über das Magnetische Verhalten einiger Sulfide mit Pyritstruktur (1935)
    Weinheim : Wiley-Blackwell
    Zeitschrift für anorganische Chemie 223 (1935), S. 409-416 
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    ISSN: 0863-1786
    Keywords: Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: Aus dem magnetischen Verhalten des MnS2 ist zu schließen, daß sich die Disulfide vom Pyrittypus von einer Idealstruktur Me2+S2-, daher nicht von Me4+2S2- ableiten.
    Additional Material: 3 Ill.
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    URL: http://dx.doi.org/10.1002/zaac.19352230413
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    Nachtrag zu Abh. VIII der Reihe: Zur Kenntnis der Borsäuren und borsauren Alkalisalze. Das System B2O3-H2O (1935)
    Weinheim : Wiley-Blackwell
    Zeitschrift für anorganische Chemie 224 (1935), S. 23-24 
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    ISSN: 0863-1786
    Keywords: Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: Weder durch Anbau von Wasserdampf an Orthoborsäure noch beim Abbau gesättigter Borsäurelösung konnte bei O° ein höheres Borsäurehydrat in festem Zustand gefaßt werden.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/zaac.19352240103
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    Über die Reaktion zwischen Chlormonoxyd und Ammoniak (1935)
    Weinheim : Wiley-Blackwell
    Zeitschrift für anorganische Chemie 224 (1935), S. 29-32 
    Details
    ISSN: 0863-1786
    Keywords: Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Additional Material: 1 Ill.
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    URL: http://dx.doi.org/10.1002/zaac.19352240106
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    Über Komplexe Pyrrylo- und Indylosalze (1935)
    Weinheim : Wiley-Blackwell
    Zeitschrift für anorganische Chemie 224 (1935), S. 62-72 
    Details
    ISSN: 0863-1786
    Keywords: Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Additional Material: 2 Ill.
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    URL: http://dx.doi.org/10.1002/zaac.19352240110
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    Oxalatoverbindungen (1935)
    Weinheim : Wiley-Blackwell
    Zeitschrift für anorganische Chemie 224 (1935), S. 93-96 
    Details
    ISSN: 0863-1786
    Keywords: Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Additional Material: 1 Tab.
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    URL: http://dx.doi.org/10.1002/zaac.19352240114
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    Die Einwirkung von Kohlenoxyd auf ammoniakalische Cuprisalzlösungen. II. Mitteilung: Kohlenoxyd und Kupfer-2-amminverbindungen in Gegenwart von metallischem Kupfer (1935)
    Weinheim : Wiley-Blackwell
    Zeitschrift für anorganische Chemie 224 (1935), S. 130-152 
    Details
    ISSN: 0863-1786
    Keywords: Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: Die Absorption von Kohlenoxyd in Cupritetramminsalzlösungen, z. B. Cupritetramminhydroxyd, -carbonat, -chlorid, -sulfat wird durch die Gegenwart metallischen Kupfers außerordentlich beschleunigt.
    Additional Material: 8 Ill.
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    URL: http://dx.doi.org/10.1002/zaac.19352240203
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    Über Die Verfärbung des Silberjodids durch wäßriges Ammoniak (1935)
    Weinheim : Wiley-Blackwell
    Zeitschrift für anorganische Chemie 223 (1935), S. 174-176 
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    ISSN: 0863-1786
    Keywords: Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: Silberjodid geht durch Einwirkung wäßrigen Ammoniaks von hoher Konzentration bis herunter zu ungefähr 5% NH3-Gehalt in eine rein weiße Verbindung mit ½ Molekül NH3 über.
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    URL: http://dx.doi.org/10.1002/zaac.19352230208
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    Über die Konstitution der Thioätherverbindungen des Platins (1935)
    Weinheim : Wiley-Blackwell
    Zeitschrift für anorganische Chemie 225 (1935), S. 115-141 
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    ISSN: 0863-1786
    Keywords: Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: Es wurde gezeigt, daß die von H. D. K. DREW und Mitarbeitern aufgestellte Theorie, nach welcher die α- und β-Thiöather- verbindungen des Platins strukturell verschieden sind, sich nicht aufrechterhalten läßt.
    Additional Material: 2 Ill.
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    URL: http://dx.doi.org/10.1002/zaac.19352250203
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    Über amphotere Oxydhydrate, die Lösungen ihrer hydrolysierenden Salze und ihre hochmolekularen Verbindungen. 30. Mitteilung. Über Iso- und Heteropolywolframsäuren insonderheit den Bildungsmechanismus der Arsen- und Phosphor-Wolframsäuren (1935)
    Weinheim : Wiley-Blackwell
    Zeitschrift für anorganische Chemie 225 (1935), S. 162-172 
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    ISSN: 0863-1786
    Keywords: Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: Sowohl in phosphor- und arsensäurefreien als auch in phosphor- und arsensäurehaltigen, wäßrigen Wolframatlösungen treten mit wachsender [H+] der Lösung zunächst die Monowolframationen unter Verbrauch von Wasserstoffionen zu den Ionen der im sauren Gebiet beständigen Hexawolframsäure - also einer Isopolysäure - zusammen. Sodann vereinigt sich die fertig gebildete Hexawolfram- saure mit der Phosphorsäure, wieder unter Mitwirkung von Wasserstoffionen, zur 1 -Phosphor-1-Hexawolframsäure, einer neuen Einheitlichen Verbindung. Die Neigung der 1-Phosphor-1-Hexawolframsäure zur sekundären Dissoziation hängt von der [H+] und der Wolframsäurekonzentration der Lösung ab. Steigerung beider Konzentrationen drängt sie zurück.
    Additional Material: 2 Ill.
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    URL: http://dx.doi.org/10.1002/zaac.19352250206
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    Über Polarisationseffekte bei Thalliumfluorid (1935)
    Weinheim : Wiley-Blackwell
    Zeitschrift für anorganische Chemie 225 (1935), S. 47-48 
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    ISSN: 0863-1786
    Keywords: Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: No Abstracts.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/zaac.19352250108
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    Untersuchungen über die Wasserbindung in der Tonsubstanz (1935)
    Weinheim : Wiley-Blackwell
    Zeitschrift für anorganische Chemie 225 (1935), S. 69-72 
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    ISSN: 0863-1786
    Keywords: Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: Der isotherme Abbau von Tonsubstanz (Zettlitzer Kaolin) zeigte, daß das Molekül nicht die allgemein angenommene Zusammensetzung Al2O3·2SiO2·2H2O hat, sondern [Al2O3·2SiO2]·3H2O bzw. Al2O3·2SiO2·1,5H2O; 0,5 Mol H2 sind im lufttrockenen Material absorbiert. Die Entwässerung erfolgt stufenweise vom 1,5- über das 1- und O,5-Hydrat zum wasserfreien Al2O3·2SiO2(Metakaolin).
    Additional Material: 2 Ill.
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    URL: http://dx.doi.org/10.1002/zaac.19352250111
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    Über die Dissoziation des Eisen(II)-Carbonats (1935)
    Weinheim : Wiley-Blackwell
    Zeitschrift für anorganische Chemie 225 (1935), S. 93-96 
    Details
    ISSN: 0863-1786
    Keywords: Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: Eisen(II)-Carbonat wurde nach SENARMONT hergestellt und sein Dissoziationsdruck im Temperaturbereich 258-285° bestimmt. Bei 760 mm beträgt die Dissoziationstemperatur 282°. Die Dissoziationswärme ist 20 900 cal. Die Dissoziation selbst geht stufenweise unter Bildung von Zwischenverbindungen vor sich.
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    Masthead (1935)
    Weinheim : Wiley-Blackwell
    Zeitschrift für anorganische Chemie 225 (1935) 
    Details
    ISSN: 0863-1786
    Keywords: Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/zaac.19352250201
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    Die in alkalischen Lösungen existierenden Polyvanadationen (1935)
    Weinheim : Wiley-Blackwell
    Zeitschrift für anorganische Chemie 224 (1935), S. 103-106 
    Details
    ISSN: 0863-1786
    Keywords: Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/zaac.19352240116
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    Die Molybdänsäure- und Wolframsäureionen bei variierender Wasserstoffionenkonzentration der Lösung (1935)
    Weinheim : Wiley-Blackwell
    Zeitschrift für anorganische Chemie 224 (1935), S. 97-102 
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    ISSN: 0863-1786
    Keywords: Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: Die Dialysenmethode sowie die potentiometrische Untersuchung ergaben übereinstimmend die Existenz des Monomolybdations in Lösungen mit pH-Werten über etwa 6,4, die sehr wahrscheinliche Existenz des Trimolybdations im Gleichgewicht mit nennenswerten Mengen von Hexa- und Monomolybdationen bei pH-Werten zwischen etwa 6,4 und 5,2, und die Existenz von Hexamolybdationen bei pH-Werten von 5,0-1,5.
    Additional Material: 2 Ill.
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    URL: http://dx.doi.org/10.1002/zaac.19352240115
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    Zur Kenntnis der Systeme BeSO4-H2O und BeSO4-H2SO4-H2O (1935)
    Weinheim : Wiley-Blackwell
    Zeitschrift für anorganische Chemie 224 (1935), S. 167-172 
    Details
    ISSN: 0863-1786
    Keywords: Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: Das Schmelzdiagramm des Systems BeSO4-H2O wurde zwischen - 18,0° (eutektische Temperatur) und 110° untersucht bei Konzentrationen von 0 - 47%, BeSO4; Bodenkörper sind Eis und Tetrahydrat.
    Additional Material: 2 Ill.
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    URL: http://dx.doi.org/10.1002/zaac.19352240205
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    Über Die Gelbfärbung der selenhaltigen Salzsäure 2. Mitteilung: Das Verhalten der selenhaltigen Salzsäure bei der Abkühlung und beim Verdünnen mit Wasser (1935)
    Weinheim : Wiley-Blackwell
    Zeitschrift für anorganische Chemie 224 (1935), S. 213-224 
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    ISSN: 0863-1786
    Keywords: Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: Der quantitative Verlauf der bei der Titration von Lösungen von SeO2 in Salzsäure mit einer Lösung von SnCl2 in konzentrierter Salzäure bis zum Beginn der Selenausscheidung (Tyndall) stattfindenden Reaktion, der in der ersten Mitteilung bei Zimmertemperatur studiert worden ist, wurde nun bei tieferen Temperaturen (bis -22,5°) untersucht. Dabei konnte eine deutliche Temperaturabhängigkeit zwischen dem Beginn der Ausscheidung von elementaren Selen und dem Gehalt der Lösung an reduziertem Selen festgestellt werden, indem bei höherer Temperatur die Selenfällung erst bei größerem Zusatz von SnCl2-Losung bzw. bei größerem Gehalt der Lösung an reduziertem Selen als bei tieferer Temperatur eintritt. Da die Reaktion zu einem von der Konzentration der Salzsäure abhängigen Gleichgewicht führt bzw. umgekehrt das gebildete Se2l2 durch Wasser zersetzt wird nach: so ist in der selenhaltigen Salzsäure schließlich neben Se2Cl2 und SeO2 such die Gegenwart von elementarem Selen anzunehmen. Dieses kann nun je nach den herrschenden Bedingungen in der SeO2-haltigen Salzsäure gelöst bleiben oder in elementarer Form zur Ausscheidung kommen gemäß dem Gleichgewicht: .
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    URL: http://dx.doi.org/10.1002/zaac.19352240208
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    Über die Willkürlich herbeigeführte Kristallisation von Schmelzen (1935)
    Weinheim : Wiley-Blackwell
    Zeitschrift für anorganische Chemie 224 (1935), S. 265-272 
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    ISSN: 0863-1786
    Keywords: Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/zaac.19352240305
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    Über die Systeme Alkalioxyd-CaO-Al2O3-SiO2-CO2. IV. Die CO2-Drucke des kieselsäurereicheren Teils des Systems Li2O-SiO2-CO2 und der Einwirkung von Al2O3 auf Li2CO3 (1935)
    Weinheim : Wiley-Blackwell
    Zeitschrift für anorganische Chemie 224 (1935), S. 289-304 
    Details
    ISSN: 0863-1786
    Keywords: Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Additional Material: 4 Ill.
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    URL: http://dx.doi.org/10.1002/zaac.19352240309
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  • 71
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    Die Untersuchung verschiedenartiger und isomerer nichtdissoziierter organischer Verbindungen mit Hilfe der Dialysenmethode (1935)
    Weinheim : Wiley-Blackwell
    Zeitschrift für anorganische Chemie 224 (1935), S. 325-328 
    Details
    ISSN: 0863-1786
    Keywords: Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Additional Material: 1 Tab.
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    URL: http://dx.doi.org/10.1002/zaac.19352240313
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  • 72
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    Untersuchungen an Alkali-Aluminium-Silikaten. IX. Über den silikatischen Anteil der Ultramarine (1935)
    Weinheim : Wiley-Blackwell
    Zeitschrift für anorganische Chemie 224 (1935), S. 351-368 
    Details
    ISSN: 0863-1786
    Keywords: Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: 1. Durch oftmaliges Schmelzen von Ultramarin mit Alkalicyaniden werden die Ultramarine vollkommen entschwefelt und gehen in ein farbloses, dem Nephelin bzw. Kaliophilit gleichartig zusammengesetztes Silikat Al6Si6RI6)24 = 3 (RI6O24·Al2O3·2 SiO2 über. Kieselreichere Ultramarine behalten darüber hinaus ihren Überschuß an Kieselsäure.
    Additional Material: 2 Ill.
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    URL: http://dx.doi.org/10.1002/zaac.19352240403
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  • 73
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    Über gemischte Polyhalogenide des Titans (1935)
    Weinheim : Wiley-Blackwell
    Zeitschrift für anorganische Chemie 224 (1935), S. 420-426 
    Details
    ISSN: 0863-1786
    Keywords: Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: 1. Titantertachlorid mischt sich mit Brom in jedem Verhältnis.
    Additional Material: 1 Ill.
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    URL: http://dx.doi.org/10.1002/zaac.19352240407
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  • 74
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    Untersuchungen über die Druckoxydation von Eisen-2-sulfat in neutraler und saurer Lösung (1935)
    Weinheim : Wiley-Blackwell
    Zeitschrift für anorganische Chemie 225 (1935), S. 29-32 
    Details
    ISSN: 0863-1786
    Keywords: Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: Es werden orientierende Versuche zur Druckoxydation von Ferrosulfat mit Sauerstoff bei verschiedenen Drucken und Temperaturen mitgeteilt.
    Additional Material: 3 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/zaac.19352250104
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  • 75
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    Masthead (1935)
    Weinheim : Wiley-Blackwell
    Zeitschrift für anorganische Chemie 225 (1935) 
    Details
    ISSN: 0863-1786
    Keywords: Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: No Abstracts.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/zaac.19352250301
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  • 76
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    Die komplexen Ionen der beiden Blutlaugensalze sowie der Prussi- und Prussoverbindungen (1935)
    Weinheim : Wiley-Blackwell
    Zeitschrift für anorganische Chemie 225 (1935), S. 217-220 
    Details
    ISSN: 0863-1786
    Keywords: Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: No Abstracts.
    Additional Material: 1 Tab.
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    URL: http://dx.doi.org/10.1002/zaac.19352250304
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  • 77
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    Zur Frage der Ionenhydratation und der Aquokomplexe (1935)
    Weinheim : Wiley-Blackwell
    Zeitschrift für anorganische Chemie 225 (1935), S. 221-224 
    Details
    ISSN: 0863-1786
    Keywords: Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: No Abstracts.
    Additional Material: 1 Tab.
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    URL: http://dx.doi.org/10.1002/zaac.19352250305
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  • 78
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    Magnetochemische Untersuchungen. XVIII. K2(B2H6) und K2(B2H4(OH)2) (1935)
    Weinheim : Wiley-Blackwell
    Zeitschrift für anorganische Chemie 225 (1935), S. 258-261 
    Details
    ISSN: 0863-1786
    Keywords: Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: No Abstracts.
    Additional Material: 1 Tab.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/zaac.19352250309
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  • 79
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    Röntgenuntersuchung des Diborankaliums und seiner Hydrolysenprodukte, besonders des Dioxy-Diborankaliums (1935)
    Weinheim : Wiley-Blackwell
    Zeitschrift für anorganische Chemie 225 (1935), S. 254-257 
    Details
    ISSN: 0863-1786
    Keywords: Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: No Abstracts.
    Additional Material: 8 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/zaac.19352250308
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  • 80
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    Mercurosalze und deren Amidoverbindungen (Zweite Mitteilung) (1936)
    Weinheim : Wiley-Blackwell
    Zeitschrift für anorganische Chemie 228 (1936), S. 249-254 
    Details
    ISSN: 0863-1786
    Keywords: Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: Mercuroamidochlorid, das Produkt der Einwirkung von Ammoniak auf Kalomel, ist eine einheitliche Substanz, welche in trockenem Zustande bei Zimmertemperatur vollständig haltbar ist.
    Additional Material: 2 Tab.
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  • 81
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    Über ein basisches Galliumnitrat (1936)
    Weinheim : Wiley-Blackwell
    Zeitschrift für anorganische Chemie 228 (1936), S. 255-256 
    Details
    ISSN: 0863-1786
    Keywords: Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: Es wurde die Herstellung und Zusammensetzung eines basischen Galliumnitrates beschrieben. Die Analysenzahlen für Ga und die NO3-Gruppe entsprechen der Formel: 2 Ga2O3¨ N2O5¨9H2O bzw. Ga(OH)2NO3¨ Ga(OH)3¨2H2O.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/zaac.19362280310
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    Beiträge zur systematischen Verwandtschaftslehre. 69. Über Das System Nickelmonosulfid/Nickeldisulfid/Schwefel (1936)
    Weinheim : Wiley-Blackwell
    Zeitschrift für anorganische Chemie 228 (1936), S. 275-296 
    Details
    ISSN: 0863-1786
    Keywords: Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Additional Material: 8 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/zaac.19362280313
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    Masthead (1936)
    Weinheim : Wiley-Blackwell
    Zeitschrift für anorganische Chemie 228 (1936) 
    Details
    ISSN: 0863-1786
    Keywords: Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/zaac.19362280401
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  • 84
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    Über zwei Doppelsalze des Ferrifluorids (1936)
    Weinheim : Wiley-Blackwell
    Zeitschrift für anorganische Chemie 226 (1936), S. 222-224 
    Details
    ISSN: 0863-1786
    Keywords: Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/zaac.19362260217
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  • 85
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    Zur Kenntnis der Ester der Überchlorsäure (1936)
    Weinheim : Wiley-Blackwell
    Zeitschrift für anorganische Chemie 228 (1936), S. 341-351 
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    ISSN: 0863-1786
    Keywords: Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: Die Methyl-, Äthyl- und Propylester der Überchlorsäure sind schwere ölige Flüssigkeiten. Der Siedepunkt des Methylesters liegt bei ungefähr 52°, der des Äthylesters bei ungefähr 89°. Die Überchlorsäureester sind sehr empfindlich gegen Hitze, Schlag und Reibung und außerordentlich explosiv. Sie lösen sich leicht in Äther und Alkohol; in Waser sind sie unlöslich, werden jedoch langsam verseift, und zwar der Methylester schneller als der Äthylester und dieser wiederum schneller als der Propylester.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/zaac.19362280404
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    Masthead (1935)
    Weinheim : Wiley-Blackwell
    Zeitschrift für anorganische Chemie 226 (1935) 
    Details
    ISSN: 0863-1786
    Keywords: Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/zaac.19352260301
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    Beiträge zur systematischen Verwandtschaftslehre. 70. Über das Vereinigungsvermögen von Palladium und Phosphor (1936)
    Weinheim : Wiley-Blackwell
    Zeitschrift für anorganische Chemie 228 (1936), S. 357-371 
    Details
    ISSN: 0863-1786
    Keywords: Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Additional Material: 8 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/zaac.19362280406
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    Röntgenstruktur und katalytische Eigenschaften der Silberferrite. Amorphe und kristallisierte Oxydhydrate und Oxyde. XXVIII (1936)
    Weinheim : Wiley-Blackwell
    Zeitschrift für anorganische Chemie 228 (1936), S. 352-356 
    Details
    ISSN: 0863-1786
    Keywords: Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: Die von A. Krause und Mitarbeitern nach verschiedenen Verfahren hergestellten Silberferrite wurden röntgenographisch nach der Methode yon Debye-Scherrer untersucht. Sie zeigten sämtlich das gleiche Röntgendiagramm, dessen Auswertung mit Sicherheit rhomboedrische Symmetrie erkennen ließ. Nähere Einzelheiten sind im Text zu finden.
    Additional Material: 2 Tab.
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    URL: http://dx.doi.org/10.1002/zaac.19362280405
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    Über den Molekularzustand von rotem Rheniumchlorid in Lösung (1936)
    Weinheim : Wiley-Blackwell
    Zeitschrift für anorganische Chemie 228 (1936), S. 372-382 
    Details
    ISSN: 0863-1786
    Keywords: Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Additional Material: 2 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/zaac.19362280407
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  • 90
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    Über die Einwirkung von atomarem Wasserstoff auf anorganische Verbindungen (1936)
    Weinheim : Wiley-Blackwell
    Zeitschrift für anorganische Chemie 229 (1936), S. 1-15 
    Details
    ISSN: 0863-1786
    Keywords: Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: Es wurde die Einwirkung von atomarem Wasserstoff auf feste anorganische Verbindungen untersucht. Wir fuhren alle in Betracht gezogenen Stoffe der besseren Übersicht halber in alphabetischer Reihenfolge hier an, nach den Kationen geordnet: AgCl, AlCl3, Bi, Bi2O3, BiCl3, Bi(NO3)2, Ba(NO3)2, CaCl2, CaF2; Ca(NO3)2, CaC2, Cd, CdO, CdS, CdCl2, CdCO3, Cd(NO3)2,·4H2O, CdSO4·8/3 H2O, CoCl2· 6H2O, Co(NO3),·6H2O, CO(NO2)6K3; CrCl3, CrCl3·6H2O, Cr2(SO4)3, Cr2O3; CuCl2·2H2O, CuSO4·5H2O; Fe2O3, FeCl2, FeCl3, FeSO4, Fe(CN)6K4, Fe(CN)6K3; HgO, HgS, HgCl2, HgSO4, Hg2SO4; KCl, KJ, KCN, KCNS, KClO3, KClO4, KBrO3, KNO2, KNO3, K2SO4, KHSO4; LiNO3·3H2O; MnO2, MnCl2; NH4NO3, (NH4)2SO4; NaBrO3, NaN3, NaNO2, NaNO3, NaNH2, Na2S, Na2SO3, Na2S2O3, Na2SeO3; NiCl2·6H2O, NiNO3·6H2O, NiO; P (rot), P2O5; PO4H3 krist.; PbO, Pb3O4, PbO2, PbCl2, PbSO4, PbCrO4, Pb(CH2COO)2,·3H20; S; Sb2O3, (SbOC4H4O6K)2H2O; SnO2, SnCl2·4H2O; Sr(NO3)2; Th(NO3)4; UO2(CH3COO)2, UO2(NO3)2;ZnS. Von diesen 86 Stoffen wurden 66 zum erstenmal untersucht; 8 davon erfordern noch eine eingehendere Bearbeitung.
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    URL: http://dx.doi.org/10.1002/zaac.19362290102
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    Zur Molekulargröße einiger Metaphosphate (1936)
    Weinheim : Wiley-Blackwell
    Zeitschrift für anorganische Chemie 229 (1936), S. 30-35 
    Details
    ISSN: 0863-1786
    Keywords: Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: Eine kritische Durchsicht der angeblichen monomeren Formen der Metaphosphorsäure nebst neuen kryoskopischen Messungen an dem Natrium-monometaphosphat von PASCAL haben ergeben, daß bisher kein wahres Monometaphosphat mit Sicherheit bekannt ist.Neue kryoskopische Messungen an wäßrigen Lösungen der Na-Salze von Tri- und Tetra-metaphosphaten haben die Molekulargröße dieser beiden Reihen sichergestellt.
    Additional Material: 4 Tab.
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    URL: http://dx.doi.org/10.1002/zaac.19362290105
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    Natur und Aufbau der Eisensalmiake Eie Beitrag zur Kenntnis der anomalen Mischkristalle (1936)
    Weinheim : Wiley-Blackwell
    Zeitschrift für anorganische Chemie 229 (1936), S. 175-187 
    Details
    ISSN: 0863-1786
    Keywords: Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: Für das Zustandekommen anomaler Mischkristalle mit NH4Cl wird folgende Regel aufgestellt: Schwermetallchloride, die mit NH4Cl entweder keine Doppelsalze bilden können oder solche, die in sehr hohem Maße dazu befähigt sind bzw. solche, deren Doppelsalze schwer löslich sind, geben keine anomalen Mischkristalle mit NH4Cl. Schwermetallchloride, die nur dann Doppelsalze mit NH4Cl bilden, wenn die Lösung genügende Mengen dieser Chloride enthält, neigen in an Schwermetallchloriden armen Lösungen zur Bildung anomaler Mischkristalle.
    Additional Material: 4 Ill.
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    URL: http://dx.doi.org/10.1002/zaac.19362290207
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    Über die Systeme Alkalioxyd—CaO—Al2O3—SiO2—CO2. VI. Die Gleichgewichte im System CaO—SiO2—CO2 (1936)
    Weinheim : Wiley-Blackwell
    Zeitschrift für anorganische Chemie 229 (1936), S. 197-224 
    Details
    ISSN: 0863-1786
    Keywords: Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Additional Material: 11 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/zaac.19362290209
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    Bestimmung der Calciumionenkonzentration. II. Bestimmung der Dissoziation des Calciumlactates (1936)
    Weinheim : Wiley-Blackwell
    Zeitschrift für anorganische Chemie 229 (1936), S. 321-336 
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    ISSN: 0863-1786
    Keywords: Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: Aus den besprochenen Untersuchungen geht hervor, daß ein Calciumion sich mit einem Lactation zu dem einfach positiv geladenen Ion CaC3H5O3+ vereinigt. Da eine solche Komplexbildung nur in gleichzeitiger Gegenwart einer Alkoholgruppe und einer negativ geladenen Gruppe stattfindet, müssen diese Gruppen an der Komplexbildung teilnehmen. So tritt z. B. Komplexbildung ein in calcium-hydroxydhaltigen alkoholischen Zucker- und Glycerinlösungen, wogegen in Acetatlösungen oder in den Lösungen anderer Salze der Fettsäuren keine Komplexbildung eintritt. Auch in nichtionisierter Milchsäure sind Hydroxylgruppe und negativ geladene Gruppe nicht gleichzeitig vorhanden und es tritt daher auch keine Komplexbildung mit der freien Säure ein. Die Komplexbildung geht nach folgender Gleichung vor sich: C3H5O3- + Ca++ = C3H5O3Ca+.
    Additional Material: 4 Ill.
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    Die Einwirkung des Stickoxyds auf Nickelcarbonyl (1936)
    Weinheim : Wiley-Blackwell
    Zeitschrift für anorganische Chemie 229 (1936), S. 357-368 
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    ISSN: 0863-1786
    Keywords: Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Additional Material: 1 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/zaac.19362290404
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    Zweischalige Komplexverbindungen von Chrom(3)-hexammin- und Chrom(3)-triäthylendiamin-Ion (1936)
    Weinheim : Wiley-Blackwell
    Zeitschrift für anorganische Chemie 229 (1936), S. 410-412 
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    ISSN: 0863-1786
    Keywords: Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Additional Material: 2 Tab.
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    URL: http://dx.doi.org/10.1002/zaac.19362290407
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    Masthead (1937)
    Weinheim : Wiley-Blackwell
    Zeitschrift für anorganische Chemie 230 (1937) 
    Details
    ISSN: 0863-1786
    Keywords: Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/zaac.19372300301
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    Über ein komplexes Rheniumoxycyanid (1937)
    Weinheim : Wiley-Blackwell
    Zeitschrift für anorganische Chemie 230 (1937), S. 215-219 
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    ISSN: 0863-1786
    Keywords: Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/zaac.19372300303
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    Über aktives Eisen X. Mitteilung. Über die magnetische Charakterisierung des Ferrimonodipyridylkomplexes und den Magnetismus einiger komplexer Ferropentacyanide (1937)
    Weinheim : Wiley-Blackwell
    Zeitschrift für anorganische Chemie 230 (1937), S. 225-238 
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    ISSN: 0863-1786
    Keywords: Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Additional Material: 3 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/zaac.19372300306
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    Electronic Resource
    Über einen einfachen Projektor zur Ausmessung schwacher Spektrallinien (1937)
    Weinheim : Wiley-Blackwell
    Zeitschrift für anorganische Chemie 230 (1937), S. 308-309 
    Details
    ISSN: 0863-1786
    Keywords: Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Additional Material: 1 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/zaac.19372300313
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