ALBERT

All Library Books, journals and Electronic Records Telegrafenberg

feed icon rss

Your email was sent successfully. Check your inbox.

An error occurred while sending the email. Please try again.

Proceed reservation?

Export
Filter
  • Articles  (174)
  • Other Sources
  • Articles: DFG German National Licenses  (174)
  • Springer  (174)
  • AGU (American Geophysical Union)
  • American Physical Society
  • 2015-2019
  • 2010-2014
  • 1990-1994  (87)
  • 1985-1989  (52)
  • 1980-1984  (35)
  • Biology  (136)
  • Physics  (43)
  • Mathematics  (11)
  • Philosophy  (1)
  • Architecture, Civil Engineering, Surveying
Collection
  • Articles  (174)
  • Other Sources
Source
Years
Year
  • 1
    ISSN: 1572-8889
    Keywords: mating behavior ; courtship ; lek ; mating system ; Mexican fruit fly ; Anastrepha ludens
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Abstract Mating behavior and factors affecting mating success of males were studied using wild Anastrepha ludens on a fieldcaged host tree. The most common courtship sequence had five components: (1) male calls from the underside of a leaf, (2) female arrives to the maleoccupied leaf, (3) male orients to female and stops calling, (4) one or both approach to a face-to-face position 1–3 cm apart, and (5) male mounts female after 1–2 s. Courtship behavior was almost identical to that of laboratoryculture flies observed previously under laboratory conditions. Most malefemale encounters occurred at a height of 1–2m, well inside the outer canopy of the tree. Differential mating success by males occurred. No male mated more than once per day, owing possibly to a very short sexual activity period. Factors favoring mating success of males were survival ability and tendency to join male aggregations and to fight other males. Thorax length and age (9–11 days difference) had no effects on male copulatory success. Overall win/loss percentage was not related to mating success because the males that were most successful at mating fought mostly among themselves, driving their win/loss percentage down. However, these successful males (at mating) won most of their fights against less successful males. Results confirmed a lek mating system: males aggregated, called, and defended territories; territories did not contain femalerequired resources; and females exercised mate choice, apparently through selection of sites within leks.
    Type of Medium: Electronic Resource
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
  • 2
    Electronic Resource
    Electronic Resource
    Springer
    Mycopathologia 125 (1994), S. 3-5 
    ISSN: 1573-0832
    Keywords: Amanita virosa ; Amatoxin ; Mortal mushroom poisoning
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Medicine
    Notes: Abstract Mushroom poisonings caused by amatoxins are mostly lethal. Information about mycetisms caused by white species ofAmanita is scarce. The present paper describes a case of mushroom poisoning caused byA. virosa. A prolongated latency period (6–10 hours), followed by cholera-like, improvement and visceral complication phases confirmed the amatoxin poisoning. The consumption of about 3 pounds of the toadstool by seven persons caused the death of five. Two patients survive the ingestion.
    Type of Medium: Electronic Resource
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
  • 3
    Electronic Resource
    Electronic Resource
    Springer
    Applicable algebra in engineering, communication and computing 5 (1994), S. 105-116 
    ISSN: 1432-0622
    Keywords: Bounds on the distance of cyclic codes ; Divisible codes ; Exponential sums
    Source: Springer Online Journal Archives 1860-2000
    Topics: Computer Science , Mathematics , Technology
    Notes: Abstract Serre has obtained sharp estimates for the number of rational points on an algebraic curve over a finite field. In this paper we supplement his technique with divisibility properties for exponential sums to derive new bounds for exponential sums in one and several variables. The new bounds give us an improvement on previous bounds for the minimum distance of the duals of BCH codes. The divisibility properties also imply the existence of gaps in the weight distribution of certain cyclic codes, and in particular gives us that BCH codes are divisible (in the sense of H. N. Ward).
    Type of Medium: Electronic Resource
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
  • 4
    ISSN: 1824-3096
    Keywords: Ethanol consumption Harris lines
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Abstract Harris lines represent episodes of growth arrest followed by recovery, thus reflecting episodes of mismatched imbalance between energy intake and energy expenditure. Consumption of ethanol during the growth period — formerly extended in our wine-producing rural areas- may lead to such a situation, due at least in part to the energy-wasteful MEOS-linked ethanol metabolism. Based on these facts, in the present study we have analysed the relationship between ethanol intake during growth period and the presence of Harris lines in the right tibia in 100 consecutive adult patients admitted to our hospitalization unit. Early ethanol consumption was strongly related with the presence of two or more, and three or more Harris lines, so that ethanol consumption should be considered in the differential diagnosis of Harris lines, and conversely, the presence of Harris lines point to ethanol consumption during growth period. This association was independent from coexisting starvation and/or illness.
    Type of Medium: Electronic Resource
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
  • 5
    ISSN: 1522-9602
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Mathematics
    Notes: Abstract Based on experimental work on the ontogeny of the electroretinogram circadian rhythm in crayfish, we present a mathematical model simulating changes in both frequency and amplitude of the electroretinogram oscillation during several developmental stages until shortly before the adult age. Simultaneously, we propose a hypothetical oscillation in the hormonal release whose frequency is imposed on the electroretinogram oscillation. The model consists of two coupled nonlinear oscillators in which a dynamical response is obtained mainly through an Andronov-Hopf bifurcation. Through the construction of the model, a biological hypothesis about the essential elements underlying the ERG circadian rhythm and their interrelations is formulated and discussed.
    Type of Medium: Electronic Resource
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
  • 6
    Electronic Resource
    Electronic Resource
    Springer
    Bulletin of mathematical biology 55 (1993), S. 561-583 
    ISSN: 1522-9602
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Mathematics
    Notes: Abstract A general model of zymogen activation is proposed and explicit kinetic equations for the time courses of the various species and products involved are given. These equations are valid for the whole course of the reaction and therefore for both the transient phase and the steady state. This model is sufficiently general to include mechanisms possessing one or more steps of zymogen activation besides possible steps of inhibition (reversible or irreversible) or inactivation.
    Type of Medium: Electronic Resource
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
  • 7
    Electronic Resource
    Electronic Resource
    Springer
    Journal of ornithology 133 (1992), S. 73-77 
    ISSN: 1439-0361
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Description / Table of Contents: Zusammenfassung An drei kleinen, Bäume nach Nahrung absuchenden Singvögeln (Kleiber, Tannenmeise, Haubenmeise) wurde das Suchverhalten in Beziehung zur räumlichen Nische untersucht. An künstlichen Futtergeräten wurde unter normierten Bedingungen die Aufmerksamkeit registriert, die die nahrungssuchenden Vögel der Umgebung schenkten. Bei Tannenmeisen, die in dichterer Vegetation nach Nahrung suchen als Kleiber, sind die Phasen der Nahrungssuche kürzer und häufiger. Dies deutet auf ein Syndrom des Verhaltens, das ein Zeitmuster der Kontrolle der Umgebung mit der räumlichen Nische einer Art in Beziehung bringt. Dieses Muster entsteht vermutlich aus dem Zusammenwirken von Häufigkeit und Dauer der Phasen der Nahrungssuche auf dem Substrat mit der Größe des Raumes, den ein Vogel nach Feinden zu kontrollieren hat, sowie der Deckung, die von der Umgebung angeboten wird.
    Notes: Summary The scanning behaviour of three small tree-gleaning passerines (Nuthatch, Coal Tit and Cresated Tit) was investigated in relation to their spatial niche by observing vigilance while feeding on artificial feeders under controlled conditions. Coal Tits which forage in substrates with denser vegetation cover, showed shorter, more frequent scans than Nuthatches, which usually forage in open substrates. Our results suggest the existence of a foraging syndrome relating the vigilance pattern to the spatial niche of a species, which probably results from the interaction between scan frequency and scan duration in relation to the space a bird must survey for predators and the protection offered by the surroundings.
    Type of Medium: Electronic Resource
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
  • 8
    Electronic Resource
    Electronic Resource
    Springer
    Journal of ornithology 130 (1989), S. 321-334 
    ISSN: 1439-0361
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Description / Table of Contents: Zusammenfassung 1985–1987 wurden Phänologie, Siedlungsdichte, Eimaße, Gelegegröße, Jungenwachstum und Bruterfolg einer Population des Steinschmätzers auf der südschwedischen Insel Öland untersucht. 1987 waren die Lufttemperaturen besonders niedrig und die Niederschläge sehr hoch. Der Sommer 1986 wies dagegen die höchsten Temperaturen und niedrigsten Niederschläge der 3 Jahre auf. Kaltes, windiges und regnerisches Wetter war mit längerer Brütezeit, längeren Intervallen zwischen Erst- und Ersatzbruten, langsamerem Jungenwachstum, schlechterer Kondition der ausfliegenden Jungen und höheren Verlusten durch Verhungern und Beutefeinde korreliert. Die Gelegegröße nahm mit dem Legedatum ab; die größten Gelege hatten im Mittel größere Eier. Die Bebrütungszeit nahm mit der Gelegegröße ab. Größere Weibchen legten größere Eier und zeigten Tendenz, größere Gelege zu produzieren. Die zuletzt gelegten Eier waren meist die schwersten, besonders in großen Gelegen. Ausfälle durch Verhungern stiegen in 2 Jahren mit der Brutgröße.
    Notes: Summary The breeding phenology, territory size, egg dimensions, clutch size, nestling growth and reproductive success of a dense population of WheatearsOenanthe oenanthe was studied on the island of Öland, S. Sweden during the years 1985–1987. The 1987 season was exceptionally cold and rainy, 1986 had the warmest and driest conditions, while 1985 was intermediate with respect to weather. Cold, windy and rainy weather was associated to prolonged incubation, greater intervals between first and replacement clutches, prolonged nestling growth, lower fledging condition, increased starvation and increased predation. Large clutches were laid earlier in the season and contained relatively larger eggs than small clutches. Incubation periods decreased with clutch size. Female size was positively correlated with egg size and with clutch size. The last egg laid in a clutch had a tendency to be heavier than eggs laid previously, especially in large clutches. Nestling starvation increased with brood size in 2 years.
    Type of Medium: Electronic Resource
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
  • 9
    Electronic Resource
    Electronic Resource
    Springer
    The European physical journal 55 (1992), S. 175-177 
    ISSN: 1434-6052
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract Particles which normally decouple in the large mass limit (i.e., unrelated to the symmetry breaking) may contribute to radiative corrections if their mass ism new∼M W . We study their effect on various observables.
    Type of Medium: Electronic Resource
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
  • 10
    Electronic Resource
    Electronic Resource
    Springer
    Acta biotheoretica 40 (1992), S. 1-9 
    ISSN: 1572-8358
    Keywords: Ribozyme ; Record ; Code ; Self-description
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Abstract We study the appearance of genetic information starting from a system where self-reproductive and enzymatic functions are supported by the same sort of molecules. In a first phase, the information must have arisen in the form of rate independent sequences as records of enzymatic functions. Although this stage must have played an important role in evolution, it will be shown how its evolutive capacities were blocked by the impossibility of appearance of geno/phenotype duality. Finally, a logical scheme is proposed for a transition process toward a system with a code offering a simplification of the conditions required from the assumption of a maximum use of the double RNA capacity, both reproductive and enzymatic.
    Type of Medium: Electronic Resource
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
Close ⊗
This website uses cookies and the analysis tool Matomo. More information can be found here...