ALBERT

All Library Books, journals and Electronic Records Telegrafenberg

X
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
  • Ateles  (3)
  • INSTRUMENTATION AND PHOTOGRAPHY  (3)
  • Animals  (2)
  • 2020-2024
  • 1985-1989  (8)
  • 1
    Electronic Resource
    Electronic Resource
    Multiple central place foraging by spider monkeys: travel consequences of using many sleeping sites (1989)
    Springer
    Oecologia 79 (1989), S. 506-511 
    Details
    ISSN: 1432-1939
    Keywords: Multiple central place foragers ; Ateles ; Sleeping sites
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Summary Central place foraging models assume that animals return to a single central place such as a nest, burrow, or sleeping site. Many animals, however choose between one of a limited number of central places. Such animals can be considered Multiple Central Place Foragers (MCPF), and such a strategy could reduce overall travel costs, if the forager selected a sleeping site close to current feeding areas. We examined the selection of sleeping sites (central places) by a community of spider monkeys (Ateles geoffroyi) in Santa Rosa National Park, Costa Rica in relation to the location of their feeding areas. Spider monkeys repeatedly used 11 sleeping trees, and they tended to choose the sleeping site closest to their current feeding area. A comparison of the observed travel distances with distances predicted for a MCPF strategy, a single central place strategy, and a strategy of randomly selecting sleeping sites demonstrated (1) that the MCPF strategy entailed the lowest travel costs, and (2) that the observed travel distance was best predicted by the MCPF strategy. Deviations between the observed distance travelled and the values predicted by the MCPF model increased after a feeding site had been used for several days. This appears to result from animals sampling their home range to locate new feeding sites.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00378668
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 2
    Electronic Resource
    Electronic Resource
    Social responses to the traumatic injury of a juvenile spider monkey (Ateles geoffroyi) (1987)
    Springer
    Primates 28 (1987), S. 271-275 
    Details
    ISSN: 0032-8332
    Keywords: Compensatory care ; Spider monkey ; Ateles ; Injury
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Abstract The behavioural development of a juvenile male spider monkey (Ateles geoffroyi) preceding and subsequent to a traumatic injury resulting in the loss of his tail, was documented over a nine-month period in Santa Rosa National Park, Costa Rica. The juvenile became heavily reliant on his mother, who readily provided compensatory care, including nursing the juvenile even though he had previously been weaned. In comparison to another juvenile male spider monkey of similar age, the development of the injured animal was severely retarded and even five months after the accident, the juvenile was still nursing and being carried by his mother. As injuries may be relatively common among primates it is suggested that the provision of compensatory care is an important trait in many primate species.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF02382577
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 3
    Electronic Resource
    Electronic Resource
    Patterns of foraging and range use by three species of neotropical primates (1988)
    Springer
    Primates 29 (1988), S. 177-194 
    Details
    ISSN: 0032-8332
    Keywords: Foraging ; Range use ; Ateles ; Alouatta ; Cebus
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Abstract This paper describes the diet and range use patterns of the three species of primates in Santa Rosa National Park, Costa Rica (Ateles geoffroyi, Alouatta palliata, andCebus capucinus) and examines the variation in these variables as they relate to seasonal changes and concomitant changes in food availability. These three primate species were studied over a four-year period for a total of 24 months in the field. Santa Rosa National Park is in an area that experiences a long severe dry season in which little if any rain falls and the majority of the non-riparian trees lose their leaves. However, even though the three species were very flexible in terms of diet and range use, the behavioural variability did not correspond to changes in food availability or season.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF02381121
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 4
    facet.materialart.
    Unknown
    Nutritional importance of pyrroloquinoline quinone (1989)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 1989-08-25
    Description: Mice fed a chemically defined diet devoid of pyrroloquinoline quinone (PQQ) grew poorly, failed to reproduce, and became osteolathyritic. Moreover, severely affected mice had friable skin, skin collagen that was readily extractable into neutral salt solutions, and decreased lysyl oxidase. The identification of functional defects in connective tissue and the growth retardation associated with PQQ deprivation suggest that PQQ plays a fundamental role as a growth factor or vitamin.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Killgore, J -- Smidt, C -- Duich, L -- Romero-Chapman, N -- Tinker, D -- Reiser, K -- Melko, M -- Hyde, D -- Rucker, R B -- AM-35747/AM/NIADDK NIH HHS/ -- HL-15965/HL/NHLBI NIH HHS/ -- New York, N.Y. -- Science. 1989 Aug 25;245(4920):850-2.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Department of Nutrition, School of Agricultural and Environmental Sciences, University of California, Davis 95616.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/2549636" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Coenzymes/*physiology ; Collagen/metabolism ; Female ; Growth Substances/physiology ; Mice ; Nutritional Physiological Phenomena ; PQQ Cofactor ; Quinolones/deficiency/*physiology ; Skin/metabolism
    Print ISSN: 0036-8075
    Electronic ISSN: 1095-9203
    Topics: Biology , Chemistry and Pharmacology , Computer Science , Medicine , Natural Sciences in General , Physics
    Published by American Association for the Advancement of Science (AAAS)
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    PAPER CURRENT
  • 5
    facet.materialart.
    Unknown
    Long-term synaptic potentiation (1988)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 1988-11-04
    Description: Long-term synaptic potentiation (LTP) is a leading candidate for a synaptic mechanism of rapid learning in mammals. LTP is a persistent increase in synaptic efficacy that can be quickly induced. The biophysical process that controls one type of LTP is formally similar to a synaptic memory mechanism postulated decades ago by the psychologist Donald Hebb. A key aspect of the modification process involves the N-methyl-D-aspartate (NMDA) receptor-ionophore complex. This ionophore allows calcium influx only if the endogenous ligand glutamate binds to the NMDA receptor and if the voltage across the associated channel is also sufficiently depolarized to relieve a magnesium block. According to one popular hypothesis, the resulting increase in the intracellular calcium concentration activates protein kinases that enhance the postsynaptic conductance. Further biophysical and molecular understanding of the modification process should facilitate detailed explorations of the mnemonic functions of LTP.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Brown, T H -- Chapman, P F -- Kairiss, E W -- Keenan, C L -- New York, N.Y. -- Science. 1988 Nov 4;242(4879):724-8.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Department of Psychology, Yale University, New Haven, CT 06520.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/2903551" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; In Vitro Techniques ; Learning/*physiology ; Neuronal Plasticity ; Neurotransmitter Agents/physiology ; Receptors, Neurotransmitter/physiology ; Synapses/*physiology
    Print ISSN: 0036-8075
    Electronic ISSN: 1095-9203
    Topics: Biology , Chemistry and Pharmacology , Computer Science , Medicine , Natural Sciences in General , Physics
    Published by American Association for the Advancement of Science (AAAS)
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    PAPER CURRENT
  • 6
    facet.materialart.
    Unknown
    A capacitive technique for real-time monitoring polymer coating thickness on carbon filaments during prepregging process (1989)
    In:  CASI
    Details
    Publication Date: 2019-06-28
    Description: A technique for gauging the coating thickness during prepreg processing of carbon fibers was developed. It is based on the concept of measuring the capacitance of a cylindrical condenser through which a bundle of prepregged fibers is passed axially. Empirical results indicate the capacitance of this condenser element is linearly related to the polymer coating thickness on the fibers in the bundle. The capacitive transducer was successfully used to measure the polymer thickness on several test fiber bundles under static conditions.
    Keywords: INSTRUMENTATION AND PHOTOGRAPHY
    Type: NASA-TM-101682 , NAS 1.15:101682
    Format: application/pdf
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    NASA TECHNICAL REPORTS
  • 7
    facet.materialart.
    Unknown
    Piezoresistive silicon pressure sensors in cryogenic environment (1989)
    In:  Other Sources
    Details
    Publication Date: 2019-07-13
    Description: This paper presents data on low-temperature measurements of silicon pressure sensors. It was found that both the piezoresistance coefficients and the charge-carrier mobility increase with decreasing temperature. For lightly doped semiconductor materials, the density of free charge carriers decreases with temperature and can freeze out eventually. However, the effect of carrier freeze-out can be minimized by increasing the impurity content to higher levels, at which the temperature dependency of piezoresistance coefficients is reduced. An impurity density of 1 x 10 to the 19th/cu cm was found to be optimal for cryogenic applications of pressure sensor dies.
    Keywords: INSTRUMENTATION AND PHOTOGRAPHY
    Type: International Instrumentation Symposium; May 01, 1989 - May 04, 1989; Orlando, FL; United States
    Format: text
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    NASA TECHNICAL REPORTS
  • 8
    facet.materialart.
    Unknown
    A temperature and pressure controlled calibration system for pressure sensors (1989)
    In:  Other Sources
    Details
    Publication Date: 2019-07-13
    Description: A data acquisition and experiment control system capable of simulating temperatures from -184 to +220 C and pressures either absolute or differential from 0 to 344.74 kPa is developed to characterize silicon pressure sensor response to temperature and pressure. System software is described that includes sensor data acquisition, algorithms for numerically derived thermal offset and sensitivity correction, and operation of the environmental chamber and pressure standard. This system is shown to be capable of computer interfaced cryogenic testing to within 1 C and 34.47 Pa of single channel or multiplexed arrays of silicon pressure sensors.
    Keywords: INSTRUMENTATION AND PHOTOGRAPHY
    Type: International Instrumentation Symposium; May 01, 1989 - May 04, 1989; Orlando, FL; United States
    Format: text
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    NASA TECHNICAL REPORTS
Close ⊗
This website uses cookies and the analysis tool Matomo. More information can be found here...