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  • Column liquid chromatography
  • growth
  • stability
  • Springer  (26)
  • American Chemical Society (ACS)
  • MDPI - Multidisciplinary Digital Publishing Institute
  • 1975-1979  (26)
Collection
Publisher
  • Springer  (26)
  • American Chemical Society (ACS)
  • MDPI - Multidisciplinary Digital Publishing Institute
  • Wiley-Blackwell  (1)
Years
Year
  • 1
    Electronic Resource
    Electronic Resource
    Springer
    BIT 17 (1977), S. 321-328 
    ISSN: 1572-9125
    Keywords: 5.15 ; nonlinear equation ; root finding ; multiple root ; secant method ; Steffensen procedure ; order of convergence ; efficiency ; stability
    Source: Springer Online Journal Archives 1860-2000
    Topics: Mathematics
    Notes: Abstract A superlinear procedure for finding a multiple root is presented. In it the secant method is applied to the given function divided by a divided difference whose increment shrinks toward zero as the root is approached. Two function evaluations per step are required, but no derivatives need be calculated.
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  • 2
    Electronic Resource
    Electronic Resource
    Springer
    Journal of statistical physics 14 (1976), S. 399-416 
    ISSN: 1572-9613
    Keywords: Reservoir-driven open systems ; coherent states ; entropy production ; nonlinear equations ; irreversible processes ; stationary state ; stability
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract A kinetic equation for the density matrix of a monomode laser with explicit coupling with a thermal reservoir representing the cavity and a nonthermal one representing the pumping mechanism is derived. The macroscopic behavior of this system, inferred from Glauber's P function, is discussed within the framework of Glansdorff-Prigogine's theory of far-from-thermal-equilibrium open systems.
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  • 3
    Electronic Resource
    Electronic Resource
    Springer
    Biochemical genetics 14 (1976), S. 281-292 
    ISSN: 1573-4927
    Keywords: rat liver ; chromatin ; growth ; heterosis ; RNA ; DNA ; protein
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Chemistry and Pharmacology
    Notes: Abstract The manifestation of hybrid vigor with regard to the inheritance of body weight was established as a postweaning phenomenon in rats. Liver weight gain generally corresponded to body weight gain and also reflected hybrid vigor. The protein/DNA ratios of the chromatin from livers of inbred and heterotic hybrid male rats were found to increase with increasing age in growing rats. Hybrid chromatin had higher protein/DNA ratios throughout the age range studies. The difference between hybrids and inbreds were greatest in the early postweaning stages of growth and maturation. The RNA/DNA ratios of chromatin from livers of inbred and hybrid male rats were also found to exhibit trends within certain developmental periods.
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  • 4
    ISSN: 1573-4927
    Keywords: rat liver ; chromatin ; proteins ; growth ; heterosis
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Chemistry and Pharmacology
    Notes: Abstract Electrophoretic comparisons of histones and other acid-extractable chromatin proteins isolated from the livers of growing F344 inbred rats and a heterotic paternal hybrid derived by crossing F344 males with Holtzman females reveal significant heterogeneity among a class of nonhistone components soluble in acid. These variations appear to be age and line specific and show more variation in the inbred than the hybrid. Comparisons of the acid-insoluble nonhistone proteins by sodium dodecylsulfate gel electrophoresis reveal significant quantitative changes in a 28,600 dalton polypeptide present in large quantities at 30, 35, and 50 days of age in the hybrid and at 40 and 45 days only in the inbred. Other minor variations were noted in a class of proteins of 40,000–45,000 molecular weight and in those of very high molecular weight (100,000–200,000). Such variations could be a reflection of or prelude to changes in genetic activity and could ultimately be important in the control of growth patterns of developing heterotic animals.
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  • 5
    Electronic Resource
    Electronic Resource
    Springer
    Potato research 21 (1978), S. 1-8 
    ISSN: 1871-4528
    Keywords: growth ; yield ; rhizosphere ; Arran Banner ; Compagnon ; Bintje
    Source: Springer Online Journal Archives 1860-2000
    Topics: Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition
    Description / Table of Contents: Zusammenfassung Im Herbst 1975, im Frühjahr und im Herbst 1976 wurden in Tripolis. Libyen, drei Versuche durchgeführt, um den Einfluss der Inokulation von Pflanzkartoffeln mitAzotobacter auf das Wachstum und den Ertrag von drei Kartoffelsorten (Arran Banner, Bintje und Compagnon) zu untersuchen. Nur bei der Sorte Arran Banner ergab sich eine Beeinflussung durch die Inokulation mitAzotobacter (Tabelle 1 und 3). Der Ertrag war in den drei Versuchen um 42.6% 17.4% bzw. 8.5% gesteigert. Die stärkste Reaktion ergab sich im ersten Versuch. bei dem niedrige Temperaturen und Bewölkung vorherrschten und die Wachstumsbedingungen für die Kartoffeln im allgemeinen ungünstig waren. Die Sorten Bintje und Compagnon zeigten keine signifikante Steigerung des Ertrages nach der Inokulation. Die Inokulation erhöhte die Stengellänge, hatte aber keinen signifikanten Einfluss auf die Stengelzahl pro Pflanze (Tabelle 2). Zählungen im Boden der Rhizosphäre zeigten. dass nach Inokulation des Pflanzgutes mitAzotobacter die Population in der Wurzelzone anstieg (Tabelle 4). Die Ertragssteigerung nach der Inokulation scheint durch eine Anreicherung vonAzotobacter in der Rhizosphäre intokulierter Pflanzen hervorgerufen zu sein.
    Abstract: Résumé Trois expérimentations ont été menées à Tripoli en Libie afin d'étudier l'effet de l'inoculation de tubercules de semence avecAzotobacter sp. sur la croissance et le rendement de 3 variétés de pomme de terre (Arran Banner, Bintje et Compagnon). Ces essais se sont déroulés durant l'automne 1975, le printemps et l'automne 1976. Il n'y a eu que la variété Arran Banner qui a répondu de manière conséquente à l'inoculationd'Azotobacter sp. (tableaux 1 et 3). L'augmentation de rendement a été respectivement de 42.6%, 17.4% et 8,5% dans les 3 expériences. La meilleure réponse a été obtenue dans la première expérimentation où des températures basses et des jours couverts ont dominé et où les conditions de végétation ont été généralement défavorables à la pomme de terre. Les variétés Bintje et Compagnon n'ont pas montré d'augmentation significative du rendement avec inoculation. L'inoculation parAzotobacter sp, augmente la longueur des tiges, mais n'a pas d'effet significatif sur le nombre de tiges par plante (tableau 2). Les comptagesd'Azotobacter sp. dans la rhizosphère ont indiqué que l'inoculation de la semence augmentait la populationd'Azotobacter au niveau de la zone racinaire (tableau 4). Cela est probablement dû au fait que l'augmentation du rendement grâce à l'inoculation résulte d'une meilleure adaptationd'Azotobacter sp. au niveau de la rhizosphère des plantes inoculées.
    Notes: Summary When the potato cultivars Arran Banner, Bintje, and Compagnon were inoculated withAzotobacter chroococcum in Libya, only Arran Banner responded significantly; plant growth was stimulated and the yield of marketable tubers increased by 8.5–42.6% above the untreated control. The very large yield increase in one season was associated with unfavourable growing conditions.
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  • 6
    Electronic Resource
    Electronic Resource
    Springer
    Euphytica 25 (1976), S. 647-658 
    ISSN: 1573-5060
    Keywords: Theobroma cacao ; cacao ; cocoa ; Amelonado ; Upper-Amazon hybrids ; yield ; growth ; blackpod ; Ghana
    Source: Springer Online Journal Archives 1860-2000
    Topics: Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition
    Notes: Summary Progeny trials were planted at Tafo in 1952 and 1954 to compare 3 selfed local-Trinitarios, 1 outcrossed and 3 sibbed Upper Amazon progenies and 13 hybrids between Amelonado or local-Trinitarios and Upper Amazons; 1 trial included West African Amelonado. The Amazon hybrids and the outcrossed Amazon were particularly vigorous and precocious and maintained a yield advantage for 20 years. The 13 hybrids were similar in yield potential, but varied in net yield following differential losses from pod diseases, mainly caused by Phytophthora palmivora. Disease losses were lowest on one of the sibbed Amazons and the outcrossed Amazon and lower on Amelonado than on any of the 7 hybrids tested with it; in both trials losses were lower on Amelonado hybrids than on Trinitario hybrids. There was wide variation in both size and growth rates of mature trees and no consistent relationship between continued growth and crop. It seemed that later yields were not prejudiced by the precocity of Amazon hybrids, the yields from all types fluctuated together. Because the differences in disease losses are likely to be accentuated under farmer's conditions. Amelonado hybrids are preferable to local-Trinitario hybrids. The results also suggest that commercially acceptable pure Upper Amazon varieties could be developed.
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  • 7
    Electronic Resource
    Electronic Resource
    Springer
    Hydrobiologia 50 (1976), S. 173-176 
    ISSN: 1573-5117
    Keywords: Melosira ; growth ; vitamins
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Type of Medium: Electronic Resource
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  • 8
    ISSN: 1573-5117
    Keywords: Sphaerium ; growth ; fecundity ; mortality ; production
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Abstract This paper reports studies carried out on natural populations of two species of viviparous clams, Sphaerium striatinum and S. simile, at three localities in two mesotrophic lakes in upstate New York. Sphaeriids are dominant members of the benthic fauna at the second trophic level in these localities, and more generally are cosmopolitan and ubiquitous animals. A growth survey involved monthly collections of regular samples, and these were used in measurements of growth, fecundity, mortality, and biomass production. S. striatinum proved to have an 18 to 24 month lifespan and S. simile one of about 26 months. Differences in reproduction included a maximum brood size of 12 in S. striatinum and of only 6 in S. simile, spat recruitment extending over 8 months in S. striatinum and over 9 months in S. simile, and a mean spat size at birth of 3.6 mm in S. striatinum and 6.4 mm in S. simile. The gross fecundity is thus markedly lower than that in the majority of molluscs. Mortality is to some extent compensating, adult survivorship being greater in S. simile, but mortality rates are remarkably steady and relatively low in both species. Field assessments of density showed that S. striatinum was dominant in one locality, and S. simile in another locality in the same lake, but that S. striatinum occurred at greater densities than any other sphaeriid species. Cage experiments confirmed the steady mortality rates and low fecundity values for these sphaeriids. Individual growth rates in cages are considerably higher than the mean values from population samples, since growth rates there are not obscured by recruitment of spat. A more complete analysis of growth in both species involved a series of over 400 determinations of total nitrogen (by micro-Dumas). These were utilized in computations of productivity. Embryonic production makes up only a small fraction (〈 10 per cent) of the biomass turnover in these viviparous sphaeriids. The overall annual productivity (in terms of total nitrogen) is o.8 grams nitrogen per square meter per year for S. striatinum and only 0.28 grams nitrogen per square meter per year for S. simile. In a discussion of these figures they are shown to correspond to about 33 per cent of the second trophic level productivity for S. striatinum and about to per cent for S. simile. Since sphaeriids are long-lived, these percentages reflect a real dominance. In further discussion of the ‘coexistence of these two species’, it is pointed out that mortality is higher for the less common species in each locality.
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  • 9
    Electronic Resource
    Electronic Resource
    Springer
    Hydrobiologia 56 (1977), S. 195-198 
    ISSN: 1573-5117
    Keywords: consolidated mean ; cyclic average ; stability
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Abstract The correlation between the thermal stability and phytoplankton was positive during the flood season when the transparency of water was the determining factor. On the other hand the correlation was negative during the dry season when the nutrient condition was the determining factor. The correlation was of no significance when these two contrasting seasonal phases were disregarded.
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  • 10
    ISSN: 1573-5117
    Keywords: algae ; temperature ; growth ; Griffithsia tenuis
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Abstract Clonal cultures of Griffithsia tenuis were grown for 18 days (Erdschreiber solution, LD 12 : 12, 2200 lux) at 13, 18, 22 and 25°C. The optimum temperature for growth (increase in number of cells) under these conditions was 22°C.
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