(1) The high amino acid levels in the cells suggest that these cells act as inter-organ transporters and reservoirs of amino acids, they have a different role in their handling and metabolism from those of mammals.
(2) Ernst Reissner studied the formation of the inner ear initially using the embryos of fowls, then the embryos of mammals, mainly cows and pigs, and to a less extent the embryos of man.
(3) The binaural characteristics of cells in MSO were different from those in nonecholocating mammals.
(4) The findings support our earlier suggestion that the kinetics of spermatogenesis in the quail are fundamentally similar to the pattern which has been described for mammals.
(5) So far, attempts to produce linolenic acid deficiency in mammals have not revealed an absolute requirement for n-3 fatty acids.
(6) Somewhat surprisingly then, in view of the mechanisms in mammals, birds do not seem to use this seasonal message in the photoperiodic control of reproduction.
(7) This indicates a functional relationship between material supplied via the rapid phase of axonal transport and an unimpaired transsynaptic signal transmission, previously not revealed in the central nervous system of mammals.
(8) Nucleus z in the rat was found to be similar in location to nucleus z in other mammals.
(9) Phyla as diverse as insects, birds, and mammals possess distinct HRAS and KRAS sequences, suggesting that these genes are essential to metazoa.
(10) The presence in lamprey kidney of a loop which is similar to Henle's loop in mammals and birds indicates that the development of the system of osmotic concentration conditioned by the formation in the kidney of the medulla and from a sharp increase in renal arterial blood supply.
(11) Investigations carried out in Pavlodar Province have shown that 7 species of ixodid ticks, Ixodes crenulatus, I. lividus, I. persulcatus, I. laguri laguri, Dermacentor marginatus, D. reticulatus, Haemaphysalis concinna, and one brought species, Hyalomma asiaticum, parasitize domestic animals and wild mammals.
(12) Ecologic studies of small mammals in Rocky Mountain National Park (RMNP) were conducted in 1974 in order to identify the specific habitats within the Lower Montane Forest that support Colorado tick fever (CTF) virus.
(13) Dictated by underlying physicochemical constraints, deceived at times by the lulling tones of the siren entropy, and constantly vulnerable to the vagaries of other more pervasive forms of biological networking and information transfer encoded in the genes of virus and invading microorganisms, protein biorecognition in higher life forms, and particularly in mammals, represents the finely tuned molecular avenues for the genome to transfer its information to the next generation.
(14) It encodes a homeobox gene closely related to the developmentally regulated homeotic genes of flies and mammals.
(15) Based on the fact that all hibernators, at their regulated minimal body temperature, display a uniform turnover rate, related to body weight, the hypothesis is developed that cold tolerance of mammals is generally limited by a common specific minimal metabolic rate, which larger organisms, because of their lower basal metabolism, already attain in less profound hypothermia.
(16) Based on morphological, virological, biochemical and molecular biological data, it is proposed that the presence of endogenous retrovirus particles in the placental cytotrophoblasts of many mammals is indicative of some beneficial action provided by the virus in relation to cell fusion, syncytiotrophoblast formation and the creation of the placenta.
(17) Thus, the possibility exists that androgen secretion in some chelonian systems may exhibit a high degree of LH specificity like that of mammals and birds.
(18) Chlorinated ethylenes are metabolized in mammals, as a first step, to epoxides.
(19) This agrees with previous ultrastructural observations that, in small mammals, neither basement membranes nor large connective tissue spaces are found inside enteric ganglia.
(20) In recent studies, we have found that Gal alpha 1----3Gal beta 1----4GlcNAc residues are abundant on red cells and nucleated cells of nonprimate mammals, prosimians, and New World monkeys, but their expression is diminished in Old World monkeys, apes, and humans.
Placenta
Definition:
(n.) The vascular appendage which connects the fetus with the parent, and is cast off in parturition with the afterbirth.
(n.) The part of a pistil or fruit to which the ovules or seeds are attached.
Example Sentences:
(1) These studies, in addition to demonstrating that the placenta contains TRH deamidase activity, suggest that losses of fetal TRH through the placenta are not large.
(2) A cDNA library prepared from human placenta has been screened for sequences coding for factor XIIIa, the enzymatically active subunit of the factor XIII complex that stabilizes blood clots through crosslinking of fibrin molecules.
(3) 1) The incidence of premature rupture of the membranes (PROM), threatened premature delivery, toxemia and abruption placentae were 40.6, 36.4, 7.8 and 3.0%, respectively.
(4) By contrast, there was a rapid exchange of tracer Leu carbon between placenta and fetus resulting in a significant flux of labeled KIC from placenta to fetus.
(5) GnRH has paracrine (local) effects in the gonads and placenta, acts as a neurotransmitter in the central nervous system, and has autocrine regulatory effects in some tumour cells.
(6) However, a history of abruptio placentae revealed an 11-fold risk of premature separation of placentae in subsequent pregnancy.
(7) In the first model, the kinetics of the number of bacteria in the spleen, liver, and placenta of mice inoculated intravenously on day 16 of pregnancy were monitored for 48 h after infection.
(8) This was either giant teratoma of placenta or malformed twin foetus.
(9) DNA of cytomegalovirus (CMV) was examined in 131 placentae and 28 umbilical blood specimens by DNA-DNA hybridization.
(10) A stillborn girl, with external signs of trisomy 18 syndrome, was subsequently shown to have a mosaic pattern in both the lymphocytes and the placenta.
(11) The placenta was demonstrated to increase in thickness with advancing menstrual age.
(12) Glutathione S-transferase (GST) purified from Schistosoma mansoni or human placenta was inhibited by the antischistosomal drug oltipraz (OPZ) in a time- and concentration-dependent manner.
(13) We have found FLT4 expression in human placenta, lung, heart, and kidney, whereas the pancreas and brain appeared to contain very little if any FLT4 RNA.
(14) Based on morphological, virological, biochemical and molecular biological data, it is proposed that the presence of endogenous retrovirus particles in the placental cytotrophoblasts of many mammals is indicative of some beneficial action provided by the virus in relation to cell fusion, syncytiotrophoblast formation and the creation of the placenta.
(15) The levels of oestrogens and progesterone were greater (P less than 0.05) in the umbilical vein than umbilical artery, indicating the endocrine function of the placenta.
(16) In each rabbit, a single fetal sac was opened, the umbilical vessels were cannulated and the placenta was perfused in situ with buffered Krebs solution containing Dextran.
(17) Two similar, 41- and 67-kDa G-proteins were identified in the wheat germ-purified insulin receptor preparations obtained from human placenta.
(18) It was concluded that (i) free fatty acids can cross the rabbit placenta in amounts sufficient to provide the fatty acid components of stored triglyceride and structural lipids; (ii) placental transport of free fatty acids depends in part on maternal blood concentration and on foetal uptake; (iii) foetal circulating free fatty acids are continually exchanging with fatty acid pools in the placenta and with the maternal circulating free fatty acids.
(19) We postulate that the apposition of trophotaenial epithelium to the internal ovarian epithelium constitutes a placental association equivalent to a noninvasive, epithelioform of an inverted yolk sac placenta.
(20) These data suggest that fasting mobilizes maternal fuel stores but that these stores are not effectively used by the placenta or transported to the fetus for storage.