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排序方式: 共有100条查询结果,搜索用时 15 毫秒
1.
Baikenova M. B. Chereshnev V. A. Sokolova K. V. Gette I. F. Emelyanov V. V. Danilova I. G. 《Journal of Evolutionary Biochemistry and Physiology》2021,57(4):772-781
Journal of Evolutionary Biochemistry and Physiology - Due to a high occurrence of diabetes mellitus (DM) and its complications, insulin-positive cells detected in different organs are of great... 相似文献
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The effects of β-endorphin under the conditions of naloxone hydrochloride blockade of opiate receptors, as well as the effects of the selective agonists of μ-and δ-receptors DAGO and DADLE and the effects of melanocyte-potentiating factor (MPF), on the in vitro proliferative response of lymphocytes were studied. The dose-effect dependence indicated stimulating effects of β-endorphin, DAGO, and DADLE on the proliferative response in the presence of phytohemagglutinin (PHA). The tetrapeptide MPF, which is the C-terminal sequence of β-endorphin, had almost no effect on the proliferative activity of lymphocytes. β-Endorphin, naloxone, and the μ-and δ-receptor selective agonists enhanced the proliferative response of lymphocytes in an unfractionated cell culture, whereas β-endorphin, naloxone, and DAGO suppressed the proliferative activity of lymphocytes in the mononuclear fraction purified of monocytes. In both cases, the naloxone blockade of opiate receptors enhanced rather than eliminated the β-endorphin effect. 相似文献
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The effect of lincocin (a plastid protein synthesis inhibitor) treatment on the greening process of bean (Phaseolus vulgaris L.) leaves have been studied. In comparison with control leaves treated ones had a decreased rate of chloroplast development. They had a marked chlorophyll deficiency and a decreased chlorophyll a/b ratio. Some long and short wavelength forms of chlorophyll a were lacking as evidenced from the absorption spectra at 25°C and the fluorescence spectra at 77°K. The –14CO2 fixation was inhibited by 80–90% in treated leaves. The fluorescence induced by the measuring light was greater in the treated leaves than in the control ones, and the kinetics of the decline of the relative fluorescence intensity were also different. Electron microscopic studies showed macrogranum-like structures and incomplete membrane vesicles in the treated plastids. After longer treatment a destruction of membranes was observed. The results indicate some structural and functional membrane deficiencies and instability of the membranes. 相似文献
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Zamorina S. A. Shardina K. Yu. Timganova V. P. Bochkova M. S. Uzhviyuk S. V. Raev M. B. Chereshnev V. A. 《Doklady. Biochemistry and biophysics》2021,501(1):434-437
Doklady Biochemistry and Biophysics - The effect of recombinant alpha-fetoprotein (AFP) on human myeloid suppressor cell (MDSC) differentiation was studied in vitro in the presence of cytokines... 相似文献
6.
DIDIER FOURGON IGOR EECKHAUT DEVARAJEN VAÏTILINGON MICHEL JANGOUX 《Invertebrate reproduction & development.》2013,57(3):155-165
Summary The larval development of the ophiocomid ophiuroid Ophiomastix venosais described using SEM. The gastrula transforms into a uniformly ciliated early larva which progressively changes into a lecithotrophic late premetamorphic larva with a continuous bilateral ciliated band. This stage is short-lived and equivalent to a highly reduced ophiopluteus. Comparisons between O. venosa and other ophiuroid species whose development has been investigated suggest that, whatever the developmental mode (lecithotrophic or planktotrophic), a pluteus stage always occurs in ophiuroids with planktonic development. Two metamorphic stages were identified, the late metamorphic larva differing from the early one by the closure of the larval mouth. The appearance of the permanent mouth marks the end of the metamorphosis. The postlarva still possesses remnants of larval features. The transformation of the reduced ophiopluteus into a barrel-shaped metamorphic larva with transverse ciliated bands, a vitellaria larva, is followed. The possible occurrence of a unique type of metamorphic larva in non-brooding ophiuroids is discussed. Verification of this, however, needs further SEM investigations on metamorphic larva from species having “regular” planktotrophic development. 相似文献
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Steroid hormones play a key role in the beginning, development and termination of gestation. This reveiw is devoted for physiological effects of estrogens, progesterone, cortisole, ACTH, CRH in various pregnancy events: implantation, fetus development, maternal adaptation and birth initiation. Priority is fixed for estrogens--steroids that vastly increase maternal circulating blood value, induce progesterone action on uterus, regulate fetal "hypothalamic-pituitary-adrenocortical" axis, control free cortisole level in feminine blood. Diagnostic criterions of steroid hormone determination durijng pregnancy are presented. To day unconjugated estriol is the only steroid hormone that implicated in total pregnancy screening programs. Its concentration reduction has been noted in pregnancies with Dawn syndrome, some child enzyme defetcs, intrauterine growth retardation and fetal death incidents. 相似文献
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Chereshnev VA Iushkov BG Sumin MN Tiumentseva NV Khramtsova IuS Danilova IG 《Rossi?skii fiziologicheski? zhurnal imeni I.M. Sechenova / Rossi?skaia akademiia nauk》2004,90(10):1193-1202
The formation of blood system adoptive reaction in many cases is defined by the type of action and the condition of hemopoietic inductive microenvironment: hemodynamics of hemopoietic tissue, functional conditions of bone marrow macrophages, mast cells and glycosaminoglycans content. The shift in hemodlobin fraction occurs in extreme conditions requiring an increased gas transport by the blood. In case of tissue lesion, lymphocytes stimulate their regeneration. Morphogenetic function of lymphoid cells may be alerted by immunomodulators. Blood cells participate in angiogenesis, and this property may be used for vessel grafts production. 相似文献
10.
<Emphasis Type="Italic">Magadania skopetsi</Emphasis>, a new genus and species of Zoarcidae (Teleostei: Perciformes) from the Sea of Okhotsk 总被引:1,自引:1,他引:0
Gento?ShinoharaEmail author Mihail V.?Nazarkin Igor A.?Chereshnev 《Ichthyological Research》2004,51(2):137-145
A new genus and species of zoarcid fish, Magadania skopetsi, is described on the basis of 17 specimens (83.4–115.9mm SL) from the intertidal zone of the northern coast of the Sea of Okhotsk, near Magadan, Russia. This species differs from other known zoarcid genera and species by having the following combination of characters: suborbital bones 5, the suborbital canal with 6–8 small pores; first epibranchial fan-shaped; palatopterygoid series reduced; supraoccipital broadly contacting exoccipital; posttemporal ventral ramus weak; upper lip continuous at symphysis; palatine teeth, pelvic fins and scales present; lateral line configuration mediolateral, incomplete, absent on posterior half of body; vertebrae 18–22+78–83=97–104. The closest genus cannot be determined cladistically except that the species is a member of the subfamily Gymnelinae. During the spawning season, M. skopetsi lives under stones near the outer marginal area of the intertidal zone. 相似文献