Results 31 to 40 of about 770,892 (320)
Biogenesis and function of tRNA fragments during sperm maturation and fertilization in mammals
Science, 2016 Offspring affected by sperm small RNAs Paternal dietary conditions in mammals influence the metabolic phenotypes of offspring. Although prior work suggests the involvement of epigenetic pathways, the mechanisms remains unclear.
Upasna Sharma +19 more
semanticscholar +1 more source
Animal Biotelemetry, 2023 Background Due to their Arctic habitat and elusive nature, little is known about the narwhal (Monodon monoceros) and its foraging behaviour. Understanding its ability to catch prey is essential for understanding its ecological role, but also to assess ...
Frederik H. Jensen +3 more
doaj +1 more source
How large should whales be? [PDF]
PLOS ONE 8(1), e53967 (2013), 2012 The evolution and distribution of species body sizes for terrestrial mammals is well-explained by a macroevolutionary tradeoff between short-term selective advantages and long-term extinction risks from increased species body size, unfolding above the 2g minimum size induced by thermoregulation in air.
arxiv +1 more source
Nitric oxide synthases in mammals.
Biochemical Journal, 1994 Nitric oxide is an inorganic free radical gas, of formula *N=O (abbreviated as NO). The discovery in 1987/88 that vascular endothelial cells are able to synthesize NO from L-arginine as a transcellular signal [1-4] was initially received by most ...
Richard Graham Knowles, S. Moncada
semanticscholar +1 more source
The metabolic origins of big size in aquatic mammals [PDF]
arXiv, 2022 The group of large aquatic mammals has representatives being the largest living beings on earth, surpassing the weight and size of dinosaurs. In this paper, we present some empirical evidence and a mathematical model to argue that fat accumulation in marine mammals triggers a series of metabolic events that result in these animals' increased size.
arxiv
Veterinary Sciences, 2019 The ventricular filling velocities during diastole and the influence of isoflurane anesthesia on these blood flow velocities of the racing pigeon (n = 43) are evaluated by pulsed-wave (PW) Doppler sonography. Sonographic examination demonstrates an early
Marko Legler +3 more
doaj +1 more source
A circadian gene expression atlas in mammals: Implications for biology and medicine
Proceedings of the National Academy of Sciences of the United States of America, 2014 Significance We generated high-resolution multiorgan expression data showing that nearly half of all genes in the mouse genome oscillate with circadian rhythm somewhere in the body.
Ray Zhang +4 more
semanticscholar +1 more source
Overview of Current Research on Wolves in Russia
Frontiers in Ecology and Evolution, 2022 This paper provides an overview of wolf research in Russia at the beginning of the 21st century. Wolf research covered various directions, including population density estimation, management methods and minimization of human-wildlife conflicts, general ...
Andrey D. Poyarkov +3 more
doaj +1 more source
The role of transposable elements in the evolution of non-mammalian vertebrates and invertebrates [PDF]
Genome Biology 2010, 11:R59, 2010 Background: Transposable elements (TEs) have played an important role in the diversification and enrichment of mammalian transcriptomes through various mechanisms such as exonization and intronization (the birth of new exons/introns from previously intronic/exonic sequences, respectively), and insertion into first and last exons.
arxiv +1 more source
Nutrient sensing and TOR signaling in yeast and mammals
EMBO Journal, 2017 Coordinating cell growth with nutrient availability is critical for cell survival. The evolutionarily conserved TOR (target of rapamycin) controls cell growth in response to nutrients, in particular amino acids.
A. González, M. Hall
semanticscholar +1 more source