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
  • 1
    Electronic Resource
    Electronic Resource
    [s.l.] : Nature Publishing Group
    Nature 299 (1982), S. 658-658 
    ISSN: 1476-4687
    Source: Nature Archives 1869 - 2009
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] RUBEN AND BENNETT REPLY-The values cited above by Convertino et al. for blood calcium levels during human exercise are not directly relevant to our previous study1. We hypothesize that the mechanism resulting in post-exercise hypercalcaemia involves dissolution of a fraction of the crystalline ...
    Type of Medium: Electronic Resource
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
  • 2
    Electronic Resource
    Electronic Resource
    [s.l.] : Nature Publishing Group
    Nature 291 (1981), S. 411-413 
    ISSN: 1476-4687
    Source: Nature Archives 1869 - 2009
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] We examined changes in plasma calcium concentrations and blood pH following bouts of intense activity in a variety of vertebrates of differing skeletal composition. Animals were stimulated to maximal activity until exhausted (?5 min) by chasing them by hand. Blood samples were taken from these ...
    Type of Medium: Electronic Resource
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
  • 3
    Electronic Resource
    Electronic Resource
    [s.l.] : Nature Publishing Group
    Nature 286 (1980), S. 886-888 
    ISSN: 1476-4687
    Source: Nature Archives 1869 - 2009
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] Many animals use glycolysis, the anaerobic process by which glucose is degraded to lactic acid. Most invertebrate species resort to significant utilization of glycolysis only in the absence of sufficient environmental oxygen to maintain adequate rates of ATP generation via aerobiosis, or oxidative ...
    Type of Medium: Electronic Resource
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
  • 4
    Electronic Resource
    Electronic Resource
    [s.l.] : Macmillian Magazines Ltd.
    Nature 406 (2000), S. 716-718 
    ISSN: 1476-4687
    Source: Nature Archives 1869 - 2009
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] Modern birds have markedly foreshortened tails and their body mass is centred anteriorly, near the wings. To provide stability during powered flight, the avian centre of mass is far from the pelvis, which poses potential balance problems for cursorial birds. To compensate, avians adapted ...
    Type of Medium: Electronic Resource
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
  • 5
    Electronic Resource
    Electronic Resource
    New York, NY : Wiley-Blackwell
    Journal of Morphology 152 (1977), S. 89-99 
    ISSN: 0362-2525
    Keywords: Life and Medical Sciences ; Cell & Developmental Biology
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Biology , Medicine
    Notes: Dissection of the cervical and basicranial regions in three species of snakes indicates that compared to Crotalus viridis and Lichanura roseofusca, Masticophis flagellum possesses relatively high numbers of compound axial muscle insertions on the atlas-axis and vertebrae numbers 3-5. It is suggested that the condition in Masticophis facilitates its vertical-neck-horizontal-head foraging posture and has allowed axial muscles inserting on the dorsocaudal braincase in this snake to generate vertical and lateral head movements more effectively.
    Additional Material: 8 Ill.
    Type of Medium: Electronic Resource
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
  • 6
    Electronic Resource
    Electronic Resource
    Springer
    Journal of comparative physiology 109 (1976), S. 147-157 
    ISSN: 1432-136X
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Medicine
    Notes: Summary Oxygen consumption and blood lactate concentration in the snakesColuber constrictor, Crotalus viridis, Lichanura roseofusca andMasticophis flagellum and whole body lactate concentration inCrotalus viridis andMasticophis flagellum were determined under standard conditions and after a bout of maximal activity induced by a 5 min period of mechanical stimulation. Observations were made atT b=35°C inColuber, Crotalus, andMasticophis and 32°C inLichanura. Maximal oxygen consumption inColuber andMasticophis was twice that ofCrotalus and 4 x that ofLichanura (Fig. 1). Post-active whole body lactate concentration inMasticophis was twice that ofCrotalus (Fig. 2). Immediately post-active and 30 min post-active blood lactate concentration inColuber andMasticophis was 1.5 x and 3.5 x that ofCrotalus andLichanura, respectively (Fig. 3). These data support conclusions that: (a) maximal energy production by these snakes correlates well with their respective modes of predation and defense, the highly active predatorsColuber andMasticophis being capable of the greatest net energy production during activity; (b)Coluber andMasticophis exhibit aerobic scopes as high or higher than any other comparably sized reptile heretofore investigated; (c) weight specific anaerobic metabolism probably does not decrease with increasing body size in reptiles; (d) anaerobic metabolism provides 〉50% of net energy production during five minutes of activity in all species examined (Table 1).
    Type of Medium: Electronic Resource
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
  • 7
    Publication Date: 2000-08-01
    Print ISSN: 0028-0836
    Electronic ISSN: 1476-4687
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Published by Springer Nature
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
  • 8
    Publication Date: 1981-01-01
    Description: It is somewhat dismaying, if not surprising, that so many trained biologists know that dinosaurs may have been “hot-blooded,” yet are completely unaware of even the existence of the mammal-like reptiles, the Therapsida. The reasons for the dearth of widespread knowledge of the therapsids are probably fairly mundane: the mammal-like reptiles are less spectacular in appearance than dinosaurs, and good therapsid fossil localities are restricted primarily to the southern hemisphere. As a result, therapsids seldom become the subjects of museum displays or classroom student presentations. Moreover, biology textbooks, whether at the high school or college level, almost invariably devote more space for recounting the “dinosaur story” than to discussing the therapsid reptiles (1). Consequently, although application of biological systems data to the fossil record has become increasingly popular and useful in the last decade, many neontologists who might potentially make substantial contributions to our knowledge of therapsid biology remain oblivious to the significance of these animals. This is particularly unfortunate—therapsids are, of course, the direct predecessors of mammals, and, as such, the more we understand the mammal-like reptiles the more likely we are to understand the origins and functions of our own anatomical, physiological, and behavioral systems.
    Print ISSN: 0094-8373
    Electronic ISSN: 0094-8373
    Topics: Geosciences
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
  • 9
    Publication Date: 1990-01-01
    Description: Vertebrates and cephalochordates generate significant quantities of lactic acid during intense exercise. This is associated with heavy reliance on anaerobic metabolism for intramuscular ATP formation. We report here exercise-related generation of lactate in the appendicularian Oiko-pleura longicauda (Tunicata: Appendicularia) and in the brittle star Ophioderma panamensis (Echinodermata: Ophiuroidea). The chordate-wide distribution of this pattern of activity metabolism suggests its presence in Early Paleozoic prochordates. The presence of the chordate pattern of activity physiology in Ophioderma suggests that very early (Ediacarian?) deuterostomes may also have generated lactate during intense exercise. Further investigation of activity physiology in other echinoderms is warranted.
    Print ISSN: 0094-8373
    Electronic ISSN: 0094-8373
    Topics: Geosciences
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
  • 10
    Publication Date: 1987-01-01
    Description: The origin of endothermic homeothermy and of high metabolic rate in mammals is currently believed to be the result of early (Mesozoic) selection in advanced cynodont therapsids and/or early mammals for either (1) enhanced thermoregulatory capacity or (2) increased powers of endurance and stamina. Selective factors underlying the origin of specialized respiration/ventilation-support systems in mammals are possible indices of the validity of these two hypotheses. One such support structure is the diaphragm, a specialized muscle that facilitates lung ventilation. We tested capacity for maintenance of resting metabolic rate, thermoregulation, and for extended, intense exercise in laboratory rats (Rattus rattus) in which diaphragm function had been completely ablated. The results were virtual elimination of aeroboic scope (active metabolic rate — resting metabolic rate) but resting metabolic rate was unaffected. Thermoregulatory capacity was unimpaired to at least 8° below lower critical temperature. These and other data suggest that the origin of the mammalian diaphragm, as well as mammalian metabolic rates, may have been related to selection for greater levels of sustainable activity rather than for functions associated with thermoregulation.
    Print ISSN: 0094-8373
    Electronic ISSN: 0094-8373
    Topics: Geosciences
    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...