Results 321 to 330 of about 940,824 (353)
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Nature, 1953
POLYSPERMY—the entry of more than one sperm into the vitellus at fertilization—is commonly regarded as a pathological process in mammals, with the implication that it leads to early degeneration of the embryo, and this opinion has been expressed by such authorities as Lams1, Wilson2, and Hartman3.
A. W. H. Braden, C. R. Austin
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POLYSPERMY—the entry of more than one sperm into the vitellus at fertilization—is commonly regarded as a pathological process in mammals, with the implication that it leads to early degeneration of the embryo, and this opinion has been expressed by such authorities as Lams1, Wilson2, and Hartman3.
A. W. H. Braden, C. R. Austin
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Classification of mammals : above the species level
, 1997Embracing more than 5,000 genera, distributed in 425 families and 46 orders, Malcolm C. McKenna and Susan K. Bell's Classification of Mammals is the most comprehensive work to date on the systematics, relationships, and occurrences of all mammal taxa ...
M. Mckenna, S. K. Bell, G. Simpson
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Nature, 1971
In his theory of ageing Professor Bullough suggests that in mammals it is stress which delays cell death through its effect on the chalone mechanism.
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In his theory of ageing Professor Bullough suggests that in mammals it is stress which delays cell death through its effect on the chalone mechanism.
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The Quarterly Review of Biology, 1977
This review considers the behavioral, ecological, and reproductive characteristics of mammals exhibiting monogamy, i.e., mating exclusivity. From a discussion of the life histories of selected species of monogamous primates, carnivores, rodents and ungulates, several trends emerge. Two forms of monogamy occur, Type I, facultative, and Type II, obligate.
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This review considers the behavioral, ecological, and reproductive characteristics of mammals exhibiting monogamy, i.e., mating exclusivity. From a discussion of the life histories of selected species of monogamous primates, carnivores, rodents and ungulates, several trends emerge. Two forms of monogamy occur, Type I, facultative, and Type II, obligate.
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2014
Abstract In comparison to birds, magnetoreception in mammals has been understudied. This negligence has historical and methodological causes. We summarize the paradigms that have been applied in the study of magnetoreception in mammals. We also provide an overview of mammalian taxa in which magnetoreception has been studied and indicate potential ...
Erich Pascal Malkemper +3 more
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Abstract In comparison to birds, magnetoreception in mammals has been understudied. This negligence has historical and methodological causes. We summarize the paradigms that have been applied in the study of magnetoreception in mammals. We also provide an overview of mammalian taxa in which magnetoreception has been studied and indicate potential ...
Erich Pascal Malkemper +3 more
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Mesozoic Mammals and the Polyphyletic Origin of Mammals
Evolution, 1959This is, in one way, a poor time to review the iViesozoic mammals and the origin of mammals. Discoveries and studies announced but not yet published fully, if at all, are extraordinarily rich and important. They include: late Cretaceous mammals from Wyoming (McKenna and associates at the University of California) ; Triassic mammals or very advanced ...
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Microbes and Infection, 2000
Microsporidia are small, single-celled, obligately intracellular parasites that have caused significant agricultural losses and interference with biomedical research. Interest in the microsporidia is growing, as these organisms are recognized as agents of opportunistic infections in persons with AIDS and in organ transplant recipients. Microsporidiosis
John A. Shadduck +3 more
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Microsporidia are small, single-celled, obligately intracellular parasites that have caused significant agricultural losses and interference with biomedical research. Interest in the microsporidia is growing, as these organisms are recognized as agents of opportunistic infections in persons with AIDS and in organ transplant recipients. Microsporidiosis
John A. Shadduck +3 more
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ACS Synthetic Biology, 2014
Mammalian synthetic biology represents a vibrant and growing technical discipline. As this nascent field matures, technologies for engineering sophisticated mammalian cell functions are enabling the development of novel therapies that address unmet medical needs. These transformative capabilities are likely to impact clinical practice in ways that have
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Mammalian synthetic biology represents a vibrant and growing technical discipline. As this nascent field matures, technologies for engineering sophisticated mammalian cell functions are enabling the development of novel therapies that address unmet medical needs. These transformative capabilities are likely to impact clinical practice in ways that have
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Encyclopedia of Marine Mammals
, 2017Measurement of energy acquisition and allocation provides a quantitative assessment of how animals organize their daily or seasonal activities, and how they prioritize their behaviors to maximize fitness.
P., Costa
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Cellular energy utilization and molecular origin of standard metabolic rate in mammals.
Physiological Reviews, 1997The molecular origin of standard metabolic rate and thermogenesis in mammals is examined. It is pointed out that there are important differences and distinctions between the cellular reactions that 1) couple to oxygen consumption, 2) uncouple metabolism,
D. Rolfe, G. Brown
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