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  • Inorganic Chemistry  (8,605)
  • Ecology
  • 1990-1994  (3,659)
  • 1950-1954  (1,627)
  • 1935-1939  (3,365)
Collection
Keywords
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Years
Year
  • 1
    Electronic Resource
    Electronic Resource
    Voucher specimens: A way to protect the value of your research (1990)
    Springer
    Biology and fertility of soils 9 (1990), S. 93-94 
    Details
    ISSN: 1432-0789
    Keywords: Voucher specimens ; Biology ; Ecology ; Taxonomy ; Soil animals ; Soil biologist
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Geosciences , Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition
    Notes: Summary Voucher specimens ensure that the identity of organisms studied in the field or in laboratory experiments can be verified, and ensure that new species concepts can be applied to past research. Guidelines on the collection, preparation, and deposition of voucher specimens and means of referral to them are given. Type specimens and the nomenclature of species names are briefly described.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00335789
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  • 2
    Electronic Resource
    Electronic Resource
    Ecological planning proposal for Kruger National Park (1990)
    Springer
    Environmental management 14 (1990), S. 349-358 
    Details
    ISSN: 1432-1009
    Keywords: Conservation ; Ecology ; Planning ; Land use ; Zoning ; Camp siting
    Source: Springer Online Journal Archives 1860-2000
    Topics: Energy, Environment Protection, Nuclear Power Engineering
    Notes: Abstract This article discusses an application of the ecological planning model proposed by Van Riet and Cooks. The various steps outlined in this model have been applied to Kruger National Park in South Africa. The natural features of Kruger National Park, which form the basis of such an ecological planning exercise and from which the various land use categories, values, and zoning classes can be determined, are discussed in detail. The suitability of each of the various features is analyzed and a final zoning proposal for Kruger National Park is suggested. Furthermore a method for selecting a site for a new camp is illustrated by referring to the site for the new Mopane rest camp which is now under construction in the Kruger National Park. The conclusion is reached that the proposed ecological planning model can be used successfully in planning conservation areas such as Kruger National Park and for the selection of the most desirable sites for the establishment of new rest camps. Its suitability as a practical model in such planning exercises is proven by the fact that the siting proposals of two new camps based on this model have been accepted by the National Parks Board, the controlling body of Kruger National Park.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF02394203
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  • 3
    Electronic Resource
    Electronic Resource
    The ecology of the visual pigments of snappers (Lutjanidae) on the Great Barrier Reef (1994)
    Springer
    Journal of comparative physiology 174 (1994), S. 461-467 
    Details
    ISSN: 1432-1351
    Keywords: Ecology ; Great Barrier Reef ; Lutjanidae ; Microspectrophotometry ; Visual pigments
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Medicine
    Notes: Abstract The visual pigments in the retinal photoreceptors of 12 species of snappers of the genus Lutjanus (Teleostei; Perciformes; Lutjanidae) were measured by microspectrophotometry. All the species were caught on the Great Barrier Reef (Australia) but differ in the colour of the water in which they live. Some live in the clear blue water of the outer reef, some in the greener water of the middle and inshore reefs and some in the more heavily stained mangrove and estuarine water. All the species had double cones, each member of the pair containing a different visual pigment. Using Baker's and Smith's (1982) model to predict the spectral distribution of ambient light from chlorophyll and dissolved organic matter it was found that the absorption spectra of the visual pigments in the double cones were close to those that confer the maximum sensitivity in the different water types. Single cones contained a blue or violet-sensitive visual pigment. The visual pigments in the rods showed little variation, their wavelength of maximum absorption always being in the region 489–502 nm.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00191712
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  • 4
    Electronic Resource
    Electronic Resource
    Approximate analysis of variance of spatially autocorrelated regional data (1990)
    Springer
    Journal of classification 7 (1990), S. 53-75 
    Details
    ISSN: 1432-1343
    Keywords: Analysis of variance ; Choropleth map ; Ecology ; Genetics ; Geography ; Permutation test ; Spatial autocorrelation
    Source: Springer Online Journal Archives 1860-2000
    Topics: Mathematics
    Description / Table of Contents: Résumé Cet article présente une solution au problème de l'analyse de variance, pour certains cas où la variable à analyser est spatialement autocorr élée alors que le critère de classification représente des sous-régions connexes du territoire à l'étude. On sait que les méthodes classiques d'analyse de variance ne sont pas applicables dans ce type de situation puisque la condition d'indépendance des échantillons n'est pas respectée; l'autocorrélation positive réduit la variabilité intragroupe, si bien que la quantité relative de variabilité intergroupe s'en trouve artificiellement augmentée. Cette situation correspond en réalité à une vaste catégorie de problèmes en génétique des populations, en écologie et dans d'autres branches de la biologie, ainsi qu'en épidémiologie, en géographie, en géologie, en science économique, en science politique et en sociologie. Ce nouveau test appartient à la famille des tests par permutation. Nous calculons la somme des dispersions intragroupes et testons contre une distribution de référence obtenue en permutant les régions géographiques un grand nombre de fois sur la carte. La véritable difficulté de ce test est d'ordre algorithmique, puisqu'il n'est pas facile de permuter des régions sur une carte, de façon à ce que chaque groupe demeure connexe, et que la carte permutée occupe le même espace total que la carte d'origine. Cet article présente la théorie, les algorithmes, ainsi que des résultats obtenus par cette méthode. Un programme écrit en PASCAL est disponible.
    Notes: Abstract The classical method for analysis of variance of data divided in geographic regions is impaired if the data are spatially autocorrelated within regions, because the condition of independence of the observations is not met. Positive autocorrelation reduces within-group variability, thus artificially increasing the relative amount of among-group variance. Negative autocorrelation may produce the opposite effect. This difficulty can be viewed as a loss of an unknown number of degrees of freedom. Such problems can be found in population genetics, in ecology and in other branches of biology, as well as in economics, epidemiology, geography, geology, marketing, political science, and sociology. A computer-intensive method has been developed to overcome this problem in certain cases. It is based on the computation of pooled within-group sums of squares for sampled permutations of internally connected areas on a map. The paper presents the theory, the algorithms, and results obtained using this method. A computer program, written in PASCAL, is available.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01889703
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  • 5
    Electronic Resource
    Electronic Resource
    Planning and design of Berg-en-Dal, a new camp in Kruger National Park (1990)
    Springer
    Environmental management 14 (1990), S. 359-365 
    Details
    ISSN: 1432-1009
    Keywords: Planning ; Ecology ; Rest camp ; Natural Resources ; Zoning ; Landscape facets
    Source: Springer Online Journal Archives 1860-2000
    Topics: Energy, Environment Protection, Nuclear Power Engineering
    Notes: Abstract The premise of this article is that the planning and design of new rest camps in conservation areas should be based on ecological principles in such a way that the plant ecology within the camp be an integral part and extension of the natural ecology of its immediate vicinity. This is desirable so that visitors to the camp will be provided not only with facilities for resting, eating, and sleeping, but also be able to enjoy and study the natural environment in a relaxed atmosphere. The Berg-en-Dal rest camp, which was established in Kruger National Park, was planned in such a way and designed according to the principles outlined by the authors in a companion article. The planning included six zones: a control zone, day visitor zone, overnight visitor zone, staff accommodation zone, recreation zone, and service zone. The point is stressed that plant species selected to be used as additional vegetation to those already growing in the camp were endemic to the nine landscape facets identified in the camp. The design allowed for separation of the various land-use zones in such a way that they would complement each other rather than be a hindrance to each other. The camp has been built according to the plans included in this article and has proved to be a great success. The conclusion is drawn that the planning principles are sound and should be used in the future for the planning and design of rest camps for conservation areas in South Africa.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF02394204
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  • 6
    Electronic Resource
    Electronic Resource
    The method of response functions in ecology (1991)
    Springer
    International journal of biometeorology 35 (1991), S. 239-251 
    Details
    ISSN: 1432-1254
    Keywords: Modelling ; Ecology ; Response functions
    Source: Springer Online Journal Archives 1860-2000
    Topics: Geography , Physics
    Notes: Abstract This article describes the further development and new applications of the already well-known method of response functions. This method is used to present the quantitative evaluation of the reactions of various ecological and biological systems to environmental impacts. Two ecological problems were chosen as examples: the model of growth and development of cereal crops and the model of pollutant dynamics in the elementary ecosystem. In each case the results are given of the evaluation of parameters and the testing of models. It is shown that the method of response functions allows resolution of the wide range of ecological problems with sufficient accuracy, and some new theoretical results are presented. For example, based on the existing hypotheses of higher plant development, a biological time scale has been worked out. The method was elaborated to determine the minimum time of development, which is a genetically stipulated characteristic of a species and is realized when all environmental factors are optimal.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01047292
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  • 7
    Electronic Resource
    Electronic Resource
    Discrete-time travelling waves: Ecological examples (1992)
    Springer
    Journal of mathematical biology 30 (1992), S. 413-436 
    Details
    ISSN: 1432-1416
    Keywords: Travelling waves ; Integrodifferenceequations ; Bifurcations ; Diffusion ; Ecology
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Mathematics
    Notes: Abstract Integrodifference equations are discrete-time models that possess many of the attributes of continuous-time reaction-diffusion equations. They arise naturally in population biology as models for organisms with discrete nonoverlapping generations and well-defined growth and dispersal stages. I examined the varied travelling waves that arise in some simple ecologically-interesting integrodifference equations. For a scalar equation with compensatory growth, I observed only simple travelling waves. For carefully chosen redistribution kernels, one may derive the speed and approximate the shape of the observed waveforms. A model with overcompensation exhibited flip bifurcations and travelling cycles in addition to simple travelling waves. Finally, a simple predator-prey system possessed periodic wave trains and a variety of travelling waves.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00173295
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  • 8
    Electronic Resource
    Electronic Resource
    Divergent ecology of sympatric clones of the asexual gecko, Lepidodactylus lugubris (1994)
    Springer
    Oecologia 100 (1994), S. 397-405 
    Details
    ISSN: 1432-1939
    Keywords: Evolution of sex ; Ecology ; Clones ; Lepidoaactylus lugubris ; Gekkonidae
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Abstract We report differences in the thermal biology, elevational, temporal and geographic distributions of sympatric clones of the widespread asexual house gecko, Lepidodactylus lugubris. The two most common L. lugubris clones in Fiji, clones 2NA and 2NB, differ significantly in preferred temperature as measured in a laboratory heat gradient, but were similar in critical thermal maximum and minimum. Significant differences were found in the relative frequency of clones 2NA, 2NB, and a third Fijian clone, clone 3NB, at seven sites along an elevational gradient in Fiji. Clone 2NB was not collected at sites above 235 m, consistent with its higher preferred temperature, whereas clone 2NA was captured as high as 835 m. Clone 3NB was extremely rare at sealevel (1% of all individuals at three sites below 100 m), but predominated at the two highest-elevation sites (42% and 100%). Clones 2NA and 2NB did not differ significantly in their activity time or ambient activity temperature at low-elevation sites. Clone 3NB however, was active on significantly cooler nights at two of those sites. These significant inter-clonal differences in spatial and temporal distribution should allow a more complete utilization of resources by the assemblage of clones than by any single clonal genotype, and may promote coexistence of clones at a within-island and within-site scale. Clone 2NA, which is the most common clone in Fiji and has the broadest elevational distribution, also has the widest geographic distribution. It was the predominant clone at 27 of 34 sites surveyed in nine Pacific archipelagoes. This suggests that the ecological attributes that favor this clone in Fiji also favor it elsewhere in the Pacific despite differing environmental conditions and clonal composition in those areas.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00317861
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  • 9
    Electronic Resource
    Electronic Resource
    Temporal infectivity and specificity of vesicular-arbuscular mycorrhizas in co-existing grassland species (1993)
    Springer
    Oecologia 93 (1993), S. 349-355 
    Details
    ISSN: 1432-1939
    Keywords: Vesicular-arbuscular mycorrhizas ; Ecology ; Infectivity ; Specificity ; Selection
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Abstract Specificity in vesicular-arbuscular mycorrhizas (VAM), arising from selection favouring host plant/mycorrhizal fungus associations in which both organisms receive benefit, might have a significant influence on interactions between co-existing plant species. In an attempt to detect such specificity root inoculum of four tempt to detect such specificity root inoculum of four plant species, harvested from a species-rich grassland on three dates during the plant growth season, was used to infect the same plant species grown in pots. The rate and overall level of infection was different according to inoculum source and the time of year in which the inoculum was harvested, i.e. temporal variation in VAM infectivity occurs. However, there was no evidence for either specificity or mycorrhizal benefit. Inoculum produced during this experiment was used to infect “bait” Trifolium pratense plants and protein patterns of these roots indicated that a number of biochemically different endophytes were present, both within the inoculum of the four plant species but also within inoculum from one plant species. Temporal variation in mycorrhizal infectivity could be important for mycorrhizal propagation in the field. However, the lack of evidence, in this study, for specificity of VAM or an obvious nutritional benefit to plants with mycorrhizas make the role of mycorrhizas in this community difficult to interpret.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00317877
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  • 10
    Electronic Resource
    Electronic Resource
    Determinants of spatial distribution in a population of the subalpine butterfly Oeneis chryxus (1991)
    Springer
    Oecologia 88 (1991), S. 587-596 
    Details
    ISSN: 1432-1939
    Keywords: Ecology ; Butterfly ; Oeneis chryxus ; Population structure ; Population dynamics
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Summary This paper describes temporally varying determinants of the spatial distribution of adults in an insect population and the relationship between that distribution and the mating system. Male Oeneis chryxus butterflies were distributed nonrandomly throughout a sloping Colorado meadow divided horizontally by a dirt road into an upper and lower slope. Over an eight-year period of intensive study, the proportion of males located on the road, the upper slope, and the lower slope varied as a function of population size and sex ratio. In each year, more than half of the male population aggregated on sections of the road in a distinct and recurring pattern that was not correlated with the distribution of any food resource or thermal regime. Females were usually extremely scarce and not distributed in any pattern apparent from the few observations of them. Areas densely occupied by males were associated with visual landmarks. We hypothesize that the male distribution is determined by a pattern of movement of receptive females toward these landmarks. The road offers a thermally favorable environment with an unobstructed view in which to await the passage of scarce females. The mating system in this population has several lek-like features and supports the prediction that landmark mating is a favored strategy under conditions of female scarcity and wide dispersal of resources.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00317724
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  • 11
    Electronic Resource
    Electronic Resource
    The maturity index: an ecological measure of environmental disturbance based on nematode species composition (1990)
    Springer
    Oecologia 83 (1990), S. 14-19 
    Details
    ISSN: 1432-1939
    Keywords: Nematodes ; Maturity ; Ecology ; Colonization ; Biomonitoring
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Summary Nematode assemblages constitute a potential instrument for assessing the quality of submersed, temporarily submersed, and terrestrial soils and for the development of an ecological typology and biomonitoring system. Interpretation of physical or pollution-induced disturbances has hitherto mainly been based on changes in diversity, dominance patterns or percentage of dorylaimids (Adenophorea). The maturity index, based on the nematode fauna, is proposed as a gauge of the condition of the soil ecosystem. Values on a coloniser/persister scale are given for nematodes that occur in The Netherlands. The possibilities of the use of this index are demonstrated by a retrospective interpretation of some literature data. The use of nematodes in environmental studies is discussed.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00324627
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  • 12
    Electronic Resource
    Electronic Resource
    Ecology of heterotrophic dinitrogen fixation in the rhizosphere of mangrove plant community at the Ganges river estuary in India (1991)
    Springer
    Oecologia 87 (1991), S. 560-564 
    Details
    ISSN: 1432-1939
    Keywords: Mangroves ; N2-fixation ; Ecology ; Nutrient cycling ; Rhizosphere
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Summary Heterotrophic dinitrogen fixation in root associations of successional stages of the tropical mangrove plant community at the Ganges river estuary in India was investigated by excised-root acetylene reduction assay, and enumeration and identification of diazotrophic bacteria from sediment, root and tidal water samples. High to very high rates of nitrogenase activity (64–130 nmol C2H4/g dry root/h) were associated with washed excised roots of seven common early-successional mangrove species at the inundated swamps. Declining, late-successional mangroves at the occasionally inundated ridges had considerably lower values and the “declined” mangroves and other non-littoral species at embankment protected highlands had very low to insignificant values of root nitrogenase activity. Total and inorganic nitrogen contents of the mangrove sediments were low and were positively related to the stages of physiographic succession. Plant-associated sediments of particularly the old formation swamps had very high C/N ratios. Nine isolates of nitrogen-fixing bacteria belonging to all known O2 response groups were distinguished from a large population of diazotrophs associated with roots of mangroves and other associate plant species of the community. The isolates differed with respect to their N2-fixation efficiency and halotolerance in pure culture. There was no specificity of any of the bacterial isolates to any of the plant species of the community but a higher number of efficient isolates were seen to be associated with mangroves at the swampy succession. Sediment-free tidal water also contained a large population of microaerophilic and anaerobic N2-fixing bacteria.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00320420
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  • 13
    Electronic Resource
    Electronic Resource
    Technology and its environment (1993)
    Springer
    AI & society 7 (1993), S. 117-126 
    Details
    ISSN: 1435-5655
    Keywords: Ecology ; Causal science ; Human-centred technology ; Human purpose ; Taylorism ; Belief systems
    Source: Springer Online Journal Archives 1860-2000
    Topics: Computer Science
    Notes: Abstract If one interprets the ‘ecology of technology’ as the study of technology in relation to its environment, there are two important levels at which this study can be made. It is possible to consider the different environments in Europe, Japan and the USA, and look for the different technological influences which accompany them. At a more general level, one can look at those factors which are common to all three environments, and which are associated with generic similarities in the technology of all three areas. The paper considers both aspects as they have been experienced in Europe in some attempts to develop a ‘human-centred technology’.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01908609
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  • 14
    Electronic Resource
    Electronic Resource
    Ecology of technology: A perspective (1993)
    Springer
    AI & society 7 (1993), S. 109-116 
    Details
    ISSN: 1435-5655
    Keywords: Ecology ; Technology ; Demilitarisation ; Euro-centrism ; Techno-giants ; Humancentred
    Source: Springer Online Journal Archives 1860-2000
    Topics: Computer Science
    Notes: Abstract Science and technology are on trial due to the rapid changes — neither university nor science lead developments in technology, the most advanced military technology has lost linkages with industries, the widened North-South gaps — they are all sources of crisis in the global ecological balance. The Euro-centric universalism is useless to solve the global technology problems.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01908608
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  • 15
    Electronic Resource
    Electronic Resource
    Alternative life-history styles of cartilaginous fishes in time and space (1990)
    Springer
    Environmental biology of fishes 28 (1990), S. 33-75 
    Details
    ISSN: 1573-5133
    Keywords: Sharks ; Rays ; Chimaeras ; Chondrichthyes ; Evolution ; Success ; Diversity ; Ecology ; Ecomorphotypes ; Reproductive modes ; Conservation
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Synopsis Cartilaginous fishes, the sharks, rays and chimaeras (class Chondrichthyes), are a very old and successful group of jawed fishes that currently contains between 900 and 1100 known living species. Chondrichthyians show a high morphological diversity during most of their evolutionary career from the Paleozoic to the present day. They are relatively large predators which have remained a major, competitive element of marine ecosystems despite the varied rivalry of numerous other marine vertebrate groups over at least 400 million years. Although restricted in their ecological roles by morphology, reproduction and other factors, the living cartilaginous fishes are highly diverse and show numerous alternative life-history styles which are multiple answers to exploiting available niches permitted by chondrichthyian limitations. Chondrichthyians living and fossil can be divided into at least eighteen ecomorphotypes, of which the littoral ecomorphotype is perhaps the most primitive and can serve as an evolutionary origin for numerous specialist ecomorphotypes with benthic, high-speed, superpredatory, deep-slope and oceanic components. Reproductive modes in cartilaginous fishes are of six types, ranging from primitive extended oviparity through retained oviparity and yolk-sac viviparity (previously ovoviviparity) to three derived forms of viviparity. Reproductive modes are not strongly correlated with ecomorphotypes and with the phylogeny of living elasmobranchs. The success and importance of cartilaginous fishes is largely underrated by marine biologists and by the public, and requires new and ‘heretical’ emphasis to overcome the present inadequacies of chondrichthyian research and the problems of overexploitation that cartilaginous fishes face.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00751027
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  • 16
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    Brain morphology and turbidity preference in Notropis and related genera (Cyprinidae, Teleostei) (1992)
    Springer
    Environmental biology of fishes 33 (1992), S. 153-165 
    Details
    ISSN: 1573-5133
    Keywords: Neuroanatomy ; Ecology ; Vision ; Olfaction ; Gustation ; Plasticity ; Adaptation ; Evolution
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Synopsis The size of seven neural structures was compared in 51 species of Notropis, Pteronotropis, Cyprinella, Luxilus, Lythrurus, and Hybopsis, and related to the turbidity of the species& habitat. This last parameter was assessed for each species by personal communication with 42 ichthyologists. To control for size differences among species, all analyses were performed on the residuals from a regression of each character on standard length. Principal components analysis (PCA) of the residuals produced four significant PC-axes that together explained 65% of the total variation represented in the original variables. The size of brain structures concerned with vision, olfaction, and gustation was correlated with habitat turbidity. Two-way Analyses of Covariance (ANCOVAs) revealed significant differences between species in the size of all structures. Sexual dimorphism was found in the size of the olfactory bulb and the cerebellum, and significant two-way interactions (species vs. sex) were detected for the telencephalon, optic lobes, cerebellum, vagal lobe, and the eye. Cluster analysis indicated that neither similar turbidity preference nor shared phylogeny is alone sufficient to explain the observed differences in brain morphology.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00002561
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  • 17
    Electronic Resource
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    The decline of the native fishes of lakes Victoria and Kyoga (East Africa) and the impact of introduced species, especially the Nile perch, Lates niloticus, and the Nile tilapia, Oreochromis niloticus (1990)
    Springer
    Environmental biology of fishes 27 (1990), S. 81-96 
    Details
    ISSN: 1573-5133
    Keywords: Exotic fishes ; Overfishing ; Predation ; Competition ; Fisheries management ; Conservation ; Ecology
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Synopsis There has been a decline, and in some cases an almost total disappearance, of many of the native fish species of lakes Victoria and Kyoga in East Africa since the development of the fisheries of these lakes was initiated at the beginning of this century. The Nile perch, Lates niloticus, a large, voracious predator which was introduced into these lakes about the middle of the century along with several tilapiine species, is thought to have caused the reduction in the stocks of several species. But overfishing and competition between different species also appear to have contributed to this decline. By the time the Nile perch had become well established, stocks of the native tilapiine species had already been reduced by overfishing. The Labeo victorianus fishery had also deteriorated following intensive gillnetting of gravid individuals on breeding migrations. L. niloticus is, however, capable of preying on the species which haven been overfished and could have prevented their stocks from recovering from overfishing. L. niloticus is also directly responsible for the decline in populations of haplochromine cichlids which were abundant in these lakes before the Nile perch became established. Even without predation by Nile perch, it has been shown that the haplochromine cichlids could not have withstood heavy commercial exploitation if a trawl fishery had been established throughout Lake Victoria. Their utilisation for human food has also posed some problems. The abundance of the native tilapiine species may also have been reduced through competition with introduced species which have similar ecological requirements. At present, the Nile perch and one of the introduced tilapiine species, Oreochromis niloticus, form the basis of the fisheries of lakes Victoria and Kyoga.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00001938
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  • 18
    Electronic Resource
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    Diet and dentition in tropical ariid catfishes from Australia (1994)
    Springer
    Environmental biology of fishes 40 (1994), S. 159-174 
    Details
    ISSN: 1573-5133
    Keywords: Gulf of Carpentaria ; Estuary ; Feeding guilds ; Ecology ; Coexistence ; Molluscs ; Polychaetes ; Ariidae
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Synopsis The diets of 13 species of ariid catfishes from the tropical waters of the Gulf of Carpentaria are described and compared. Fishes were collected from two estuaries and inshore and offshore marine areas. Up to 10 species have been recorded from a single estuary. Although all are carnivorous and consume a variety of prey, diet analyses and statistical ordination reveal three feeding guilds - piscivores, polychaete-eaters and molluscivores. The diets of most species are similar between sites. There are strong relationships between dietary guild and the size and arrangement of the palatine teeth. The piscivorous group of catfish (guild 1) have large mouths with relatively large multiple palatine tooth plates, either in a band or in a triangular pattern and armed with sharp recurved teeth. The primarily polychaete-feeding group (guild 2) have a variable mouth size but it is usually smaller than that of guild 1 fish; their palatine teeth plates are fewer and smaller, and they have small, sharp recurved teeth. Guild 3 eat mainly molluscs, and have a small mouth and large posteriorly situated palatine plates with globular, truncated teeth. Overlaps in diet between species are probably reduced by differential distribution patterns within estuaries and different habitat preferences. The mouth-width and tooth-plate arrangements of ariids in tropical Australia are suitable for dealing with broad classes of prey rather than specific items, conferring dietary flexibility. This probably optimizes the trade-off for most species between occupation of broad feeding niches and the ability to shift diet easily.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00002543
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    Population dynamics and life-history styles of Nile tilapia,Oreochromis niloticus, in Ferguson's Gulf, Lake Turkana, Kenya (1993)
    Springer
    Environmental biology of fishes 37 (1993), S. 25-46 
    Details
    ISSN: 1573-5133
    Keywords: Ecology ; Seasonality ; Catch-rates ; Lake levels ; Oxygen ; Predators ; Size-at-maturity ; Growth ; Mortalities
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Synopsis Three observed dynamic aspects of the Nile tilapia population around Ferguson's Gulf at Lake Turkana, Kenya are evaluated and discussed: the seasonality in catch rates, the enormous inter-annual abundance variations, and the large changes in median size at first maturity. A clear understanding of the regulating mechanisms behind these features has never been achieved, although seasonal changes in the hydrology of shallow sheltered refuges seems to play an important role. This paper suggests a further holistic approach taking the impacts and interrelationships of both the primary productivity and the various predators into account. A synthesizing ecological hypothesis is elaborated, which concludes that most observations on the tilapia dynamics can be explained from changes in the oxygen concentrations and size-specific mortality pressures. Variations in these two proximate factors can ultimately be explained by the floodplain-type fluctuations in the Ferguson's Gulf environment.
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    URL: http://dx.doi.org/10.1007/BF00000710
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    The proportion of different eco-ethological sections of reproductive guilds of fishes in some African inland waters (1990)
    Springer
    Environmental biology of fishes 28 (1990), S. 179-187 
    Details
    ISSN: 1573-5133
    Keywords: Lakes ; Floodplains ; Rivers ; Perturbation ; Resilience ; Resistance ; Guarders ; Non-guarders ; Bearers ; Altricial ; Precocial ; Predictable ; Unpredictable ; Ecology
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Synopsis The continent of Africa has a wide variety of inland waters ranging from rift valley lakes to endorheic and coastal lakes, floodplains and rivers. This paper makes a preliminary comparison of the number of species in different eco-ethological sections of the reproductive guild categories of non-guarders, guarders and bearers in ancient African Great Lakes (Malawi, Victoria and Tanganyika), fluctuating endorheic lakes (Ngami, Chad and Chilwa), typical rivers (Orange-Vaal, Limpopo, Phongolo, Sabi-Lundi, Middle and Lower Zambezi, Kafue, Cunene, Okavango, Niger, Luongo, Lower Zaire) and wetlands (Okavango Delta and Kafue floodplain). The results indicate that the highest percentage of bearers and guarders is found in the ancient African Great Lakes, which are characterised by relatively predictable physico-chemical regimes, whereas a higher percentage of non-guarders is found in the rivers and wetlands, which have less predictable physico-chemical regimes. The management implications of this observation are discussed, and the usefulness of the species as a unit in ecology is assessed.
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    URL: http://dx.doi.org/10.1007/BF00751034
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    Fish reproduction and the impact of acidification in the Kyrönjoki River estuary in the Baltic Sea (1990)
    Springer
    Environmental biology of fishes 27 (1990), S. 273-283 
    Details
    ISSN: 1573-5133
    Keywords: Ecology ; Larvae ; Juveniles ; Recruitment ; Nursery areas
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Synopsis Several freshwater species use the Kyrönjoki River estuary as a spawning and nursery area. The main reasons for this seem to be the morphology of the estuary, the abundance of shelter provided by aquatic macrophytes, high food production and favourable temperature conditions. Acidification of the estuary due to drainage from acidic soils has made part of the estuary unsuitable for fish reproduction. In addition, year to year fluctuations in the acidity of the estuarine water have affected the reproductive success of several species. The severity of the effects of the acidification at the population level is determined by the spatial and temporal distribution of the larvae and juveniles.
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    URL: http://dx.doi.org/10.1007/BF00002746
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    Biology of fork-tailed catfishes from the Sepik River, Papua New Guinea (1991)
    Springer
    Environmental biology of fishes 31 (1991), S. 55-74 
    Details
    ISSN: 1573-5133
    Keywords: Floodplain fisheries ; Subsistence fisheries ; Feeding ; Condition ; Reproduction ; Ecology ; Niches ; Arius ; Hemipimelodus ; Pisces ; Ariidae
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Synopsis Ariids accounted for approximately 25% of the weight of catches and landings from rivers and lakes in the floodplain region (= 50% weight of native species). Habitat preferences were:A. solidus, lakes and rivers;A. utarus, rivers and occasionally lakes;A. coatesi andA. velutinus, rivers only;A. nox, lakes and floodplain.A. solidus andA. utarus occasionally entered the floodplain but onlyA. nox exhibited any, albeit modest, affinity for this environment. In general, the fishes showed no marked seasonality relating to the flood cycle: in four species slight increases in feeding, condition, breeding and fat deposition occurred during the dry season whilst onlyA. nox showed modest increases in these parameters during the flood season due to its increased feeding on the floodplain at that time. All species are omnivorous but diets differed according to morphology and habitat preferences. Diet overlap was greatest amongstA. coatesi, A. solidus andA. utarus which fed mainly on prawns and a variety of other plant and animal matter.A. nox is a specialised filter-feeder consuming mainly small crustaceans and small insect larvae.A. velutinus fed mainly on large insect larvae and emergent and terrestrial insects and its diet excluded prawns.A. solidus and, especially,A. utarus also fed on fish scales. Feeding commenced immediately after hatching while free embryos were still in the male parent's mouth. Large amounts of fat were stored prior to brooding during which time males fast. The reproductive style of ariid catfishes limits their colonisation of the floodplain and is a constraint to increased fisheries exploitation of the stocks. The importance of ariids to the local fishery and nutrition (fat) for the local people should be recognised.
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    Lake Victoria fisheries: the Kenyan reality and environmental implications (1994)
    Springer
    Environmental biology of fishes 39 (1994), S. 329-338 
    Details
    ISSN: 1573-5133
    Keywords: Management ; Ecology ; Traditional fishing ; Nile perch ; Tilapias ; Introduced species ; Haplochromines ; Predator-prey relationships ; Economics ; Agriculture ; Wichlum Beach ; Yala Swamp ; Conservation
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Synopsis The introduction of the Nile perch into Lake Victoria has dramatically altered the fishery in that lake and contributed to the decline of the fishery for indigenous tilapias. One sector of the fishery in Lake Victoria has benefitted from the Nile perch introduction, although catches have declined in recent years. Inefficient enforcement of fisheries regulations has had a detrimental effect on indigenous species but may also have contributed to the recent decline in Nile perch catches. Fisheries development plans have tended to favour capital-intensive fisheries and to ignore small scale subsistence fisheries. A case study at Wichlum Beach on the Kenyan shores of Lake Victoria has revealed the efficiency of traditional fishing and fish drying methods as well as the high ecological costs of the practice of kiln-drying Nile perch. Forty-five tons of firewood are used per month at Wichlum Beach alone for kiln-drying perch. The increased economic viability of the fishery has attracted professionals into the industry and resulted in the development of an export-oriented trade. The Yala Swamp adjacent to Lake Victoria has been extensively drained as part of a large land reclamation scheme and more draining is planned. Increased environmental awareness in Kenya, and Kenya's membership in the Convention on Wetlands of International Importance, has resulted in a critical review of these plans.
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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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    URL: http://dx.doi.org/10.1002/zaac.19352210303
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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
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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 
    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.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
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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
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    URL: http://dx.doi.org/10.1002/zaac.19352220110
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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
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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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    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
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    URL: http://dx.doi.org/10.1002/zaac.19352220305
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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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    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 
    Details
    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.
    Type of Medium: Electronic Resource
    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 
    Details
    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.
    Type of Medium: Electronic Resource
    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.
    Type of Medium: Electronic Resource
    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.
    Type of Medium: Electronic Resource
    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 
    Details
    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.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/zaac.19352230208
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  • 50
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    Über die Konstitution der Thioätherverbindungen des Platins (1935)
    Weinheim : Wiley-Blackwell
    Zeitschrift für anorganische Chemie 225 (1935), S. 115-141 
    Details
    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 
    Details
    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 
    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.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 
    Details
    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.
    Additional Material: 1 Tab.
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    URL: http://dx.doi.org/10.1002/zaac.19352250115
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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 
    Details
    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 
    Details
    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: .
    Additional Material: 1 Ill.
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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 
    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.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.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/zaac.19352240309
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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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    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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    Über gemischte Polyhalogenide des Titans (1935)
    Weinheim : Wiley-Blackwell
    Zeitschrift für anorganische Chemie 224 (1935), S. 420-426 
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    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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    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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    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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    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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    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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    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.
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    URL: http://dx.doi.org/10.1002/zaac.19352250309
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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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    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.
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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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    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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    Zur Kenntnis der Ester der Überchlorsäure (1936)
    Weinheim : Wiley-Blackwell
    Zeitschrift für anorganische Chemie 228 (1936), S. 341-351 
    Details
    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.
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    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.
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    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.
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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.
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    URL: http://dx.doi.org/10.1002/zaac.19362280407
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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.
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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.
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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.
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    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 
    Details
    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+.
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    URL: http://dx.doi.org/10.1002/zaac.19362290310
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    Die Einwirkung des Stickoxyds auf Nickelcarbonyl (1936)
    Weinheim : Wiley-Blackwell
    Zeitschrift für anorganische Chemie 229 (1936), S. 357-368 
    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.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 
    Details
    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.
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    URL: http://dx.doi.org/10.1002/zaac.19372300306
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    Über einen einfachen Projektor zur Ausmessung schwacher Spektrallinien (1937)
    Weinheim : Wiley-Blackwell
    Zeitschrift für anorganische Chemie 230 (1937), S. 308-309 
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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.19372300313
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    Über die Reduktion von Nickel- und Kupferoxyden mit festem Kohlenstoff (1937)
    Weinheim : Wiley-Blackwell
    Zeitschrift für anorganische Chemie 230 (1937), S. 315-320 
    Details
    ISSN: 0863-1786
    Keywords: Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: Es wurden Reduktionsversuche an Nickel- und Kupferoxyden mit festem Kohlenstoff durchgeführt. Die Reduktion der Kupferoxyde beginnt bereits bei etwa 550° praktisch merklich zu werden, während der Sauerstoffabbau der Nickeloxyde erst bei etwa 800° die Werte der Kupferoxydreduktion für 500° erreicht.
    Additional Material: 8 Ill.
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    URL: http://dx.doi.org/10.1002/zaac.19372300315
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    Die Konstitution des festen Phosphorwasserstoffs (1936)
    Weinheim : Wiley-Blackwell
    Zeitschrift für anorganische Chemie 229 (1936), S. 369-400 
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    ISSN: 0863-1786
    Keywords: Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: Es wird die Theorie aufgestellt, daß der sogenannte feste Phosphorwasserstoff eine Sorption von PH3 an einer amorphen, gelben Form des Phosphors ist. Es handelt sich demnach nicht urn einen „Polyphosphorwasserstoff“, der einen den Polyschwefelwasserstoffen vergleichbaren Bau aufweist.
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    URL: http://dx.doi.org/10.1002/zaac.19362290405
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    Über die Reaktionsfähigkeit von Legierungen bei Umwandlungen im festen Zustande. II (1936)
    Weinheim : Wiley-Blackwell
    Zeitschrift für anorganische Chemie 229 (1936), S. 413-417 
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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.19362290408
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    Schmelzpunktsdiagramme höchstfeuerfester Oxyde. VII. Systeme mit CaO und BeO (1937)
    Weinheim : Wiley-Blackwell
    Zeitschrift für anorganische Chemie 230 (1937), S. 257-276 
    Details
    ISSN: 0863-1786
    Keywords: Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Additional Material: 15 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/zaac.19372300309
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    Das Verhalten der unterphosphorigen Säure sowie der phosphorigen Säure und ihrer Monoester zu Jod. Eine vergleichende kinetische Studie (1937)
    Weinheim : Wiley-Blackwell
    Zeitschrift für anorganische Chemie 230 (1937), S. 385-404 
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    ISSN: 0863-1786
    Keywords: Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: Beim vergleichenden Studium der Reaktionskinetik des Jodumsatzes von Phosphorverbindungen, die ein direkt an Phosphor gebundenes Wasserstoffatom enthalten, zeigt sich, daß die verschiedenen Verbindungen gleichen Ladungszustandes mit Jod gleichartig reagieren. Aus der Übersicht der Ergebnisse auf S. 401 erhellt, daß die Verbindungen, welche Säuren sind, im neutralen Zustande mit Jod reagieren, während sich das einwertige Anion nicht mit merkbarer Geschwindigkeit mit Jod umsetzt. Es wird versucht, diese Tatsachen vom Standpunkte der Säure-Basenkatalyse aus zu erklären.
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    URL: http://dx.doi.org/10.1002/zaac.19372300408
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    Über die Löslichkeit von Salzen und Salzgemischen in Wasser bei Temperaturen oberhalb von 100°. I (1937)
    Weinheim : Wiley-Blackwell
    Zeitschrift für anorganische Chemie 231 (1937), S. 285-297 
    Details
    ISSN: 0863-1786
    Keywords: Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Additional Material: 8 Ill.
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    URL: http://dx.doi.org/10.1002/zaac.19372310308
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    Kolorimetrische Bestimmung von Nitraten (1937)
    Weinheim : Wiley-Blackwell
    Zeitschrift für anorganische Chemie 231 (1937), S. 298-303 
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    ISSN: 0863-1786
    Keywords: Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: 1. α-Naphtholsulfonsäure läßt sich an Stelle von Phenolsulfonsäure zur kolorimetrischen Bestimmung kleinster Nitratmengen verwenden.
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    Über den Wärmeinhalt verschiedener kristallisierter Modifikationen des Zinkhydroxydes. 14. Mitteilung über Struktur, Wärmeinhalt und sonstige Eigenschaften aktiver Stoffe von R. Fricke und Mitarbeitern (1937)
    Weinheim : Wiley-Blackwell
    Zeitschrift für anorganische Chemie 230 (1937), S. 357-365 
    Details
    ISSN: 0863-1786
    Keywords: Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: Es wurden die Unterschiede des molaren Wärmeinhaltes von 4 kristallisierten Modifikationen des Zn(OH)2 und von pseudomorphem, röntgenographisch amorphen Zinkhydroxyd gemessen. Die Wärmeinhalte der kristallisierten Zinkhydroxyde liegen sehr dicht beieinander. Die 3 instabilen der untersuchten Formen liegen in einem Unterschiedsbereich von nicht mehr als rund 100 cal. Nur das stabilste (∊)-Hydroxyd liegt in seinem Wärmeinhalt rund 200 cal tiefer als die nächst stabile Form.
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    Weiteres über aktive Zinkoxyde, sowie über die Stabilität von Zinkhydroxyden. 15. Mitteilung über Struktur, Wärmeinhalt und sonstige Eigenschaften aktiver Stoffe von R. Fricke und Mitarbeitern (1937)
    Weinheim : Wiley-Blackwell
    Zeitschrift für anorganische Chemie 230 (1937), S. 366-374 
    Details
    ISSN: 0863-1786
    Keywords: Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: 1. Es wurden auf dem Wege über verschiedene Arten von kristallinen und amorphen Zinkhydroxyden aktive und inaktive Zinkoxyde gewonnen. Die kalorimetrische Untersuchung dieser Präparate zeigte, daß der Wärmeinhalt der aktiven Oxyde nicht nur von der Art der Darstellung, sondern auch vom Ausgangsmaterial abhängt.
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