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Doklady Biological Sciences: Proceedings of the Academy of Sciences of the USSR, Biological Sciences Sections

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https://www.readbyqxmd.com/read/28058610/non-invasive-evaluation-of-the-kinematic-activity-of-the-intact-left-ventricle-of-the-heart
#1
L A Bockeria, O L Bockeria, V A Shvartz, L A Glushko, T G Le, A S Satyukova
Vector analysis of the movement of the epicardium has been used to calculate the energy efficiency of different parts of the left cardiac ventricle. The protocol based on the results of these calculations would allow the calculation of the potential power of myocardial contraction.
November 2016: Doklady Biological Sciences: Proceedings of the Academy of Sciences of the USSR, Biological Sciences Sections
https://www.readbyqxmd.com/read/28058609/ontogenetic-and-evolutionary-trends-in-the-tooth-enamel-features-in-craseomys-voles-arvicolinae-rodentia
#2
M A Fominykh, S V Zykov, A V Borodin
In Craseomys rufocanus and Craseomys rex, the age-related and species differences in thickness and microstructure of the first lower molars (ml) have been identified and studied. The results suggest that the enamel dimensional and microstructural features may serve as additional indicators of the vole tooth evolutionary stage within a single phyletic lineage.
November 2016: Doklady Biological Sciences: Proceedings of the Academy of Sciences of the USSR, Biological Sciences Sections
https://www.readbyqxmd.com/read/28058608/bioenergetics-of-arctic-marine-poikilothermic-animals
#3
L I Karamushko
The yearly energy balance has been calculated for the first time for the polar species Arctic flounder Liopsetta glacialis at temperatures of its habitat. Despite the lower rates of the constructive metabolism, the energy metabolic rate during the somatic growth and gonad development was higher compared to warmwater species of flatfishes, so that the K 2 coefficient was higher in all age groups. Functional relationships between constructive metabolism and energy metabolism in poikilothermic animals have been demonstrated...
November 2016: Doklady Biological Sciences: Proceedings of the Academy of Sciences of the USSR, Biological Sciences Sections
https://www.readbyqxmd.com/read/28058607/hair-microstructure-of-the-first-time-found-calf-of-woolly-rhinoceros-coelodonta-antiquitatis
#4
O F Chernova, A V Protopopov, T V Perfilova, I V Kirillova, G G Boeskorov
Hair microstructure of the first calf of the woolly rhinoceros Coelodonta antiquitatis found in Sakha in 2014 (the neck and hind leg hair) was examined by the light and electron scanning microscopy. The calf hair features were compared with those of two adults studied earlier. The calf coat color was much lighter than in adults, from pale ashy to blond. The extent of hair differentiation, dimensional and pigmentation indices were lower in the calf than in adult rhinoceroses. There was no medulla in the calf hairs, while in those of adults it was occasionally found...
November 2016: Doklady Biological Sciences: Proceedings of the Academy of Sciences of the USSR, Biological Sciences Sections
https://www.readbyqxmd.com/read/28058606/larval-development-of-brachiopod-coptothyris-grayi-davidson-1852-brachiopoda-rhynchonelliformea
#5
T V Kuzmina, E N Temereva, V V Malakhov
The larval development of the Brachiopod Coptothyris grayi (Davidson, 1852) from the Sea of Japan is described for the first time. Ciliated blastula proved to represent the first free-swimming stage. The blastopore is initially formed as a rounded hole stretching later along the anteroposterior axis. The larva is first divided into two lobes (the apical lobe and the trunk); the mantle lobe is formed later as two lateral folds. Two pairs of seta bundles appear in the late stage larvae. The apical larval lobe in brachiopods is supposed to match the pre-oral lobe and anterior part of the trunk with tentacles in phoronids...
November 2016: Doklady Biological Sciences: Proceedings of the Academy of Sciences of the USSR, Biological Sciences Sections
https://www.readbyqxmd.com/read/28058605/summer-molting-of-bowhead-whales-balaena-mysticetus-linnaeus-1758-of-the-okhotsk-sea-population
#6
O F Chernova, O V Shpak, A B Kiladze, V S Azarova, V V Rozhnov
In bowhead whales summering in Ulbanskiy Bay of the Okhotsk Sea, molting of epidermis has been found and histologically confirmed. The outer layer of the molting whale epidermis is longitudinally stratified and rejected in the form of relatively large plates up to several millimeters thick, each representing a lamellar formation consisting of longitudinal rows of parakeratocytes with degenerated nuclei, numerous pigment granules, and lipid inclusions. Molting intensity is correlated with the level of proliferation and regeneration of all epidermal layers, which helps to maintain the optimal skin thickness...
November 2016: Doklady Biological Sciences: Proceedings of the Academy of Sciences of the USSR, Biological Sciences Sections
https://www.readbyqxmd.com/read/28058604/distribution-of-serotonin-and-fmrf-amide-in-the-nervous-system-of-different-zooidal-types-of-cheilostome-bryozoa-a-case-study-of-arctonula-arctica
#7
K M Serova, A E Vishnyakov, O V Zaitseva, A N Ostrovsky
In the White Sea bryozoans Arctonula arctica, the structure of the nervous system and distribution of 5-hydroxytryptamine (5-HT) and FMRF-amide were studied for the first time using immunohistochemical methods and confocal scanning microscopy. The neurotransmitters studied have been actively involved into the integrative processes, gut functioning, and regulation of motion activity. In avicularia, 5-HT and FMRF-amide receptors are capable of performing the same functions, except for participation in the gut functioning, because they have no digestive system...
November 2016: Doklady Biological Sciences: Proceedings of the Academy of Sciences of the USSR, Biological Sciences Sections
https://www.readbyqxmd.com/read/28058603/communities-of-bacteria-and-viruses-in-waters-of-the-gulf-of-ob-and-taz-estuary
#8
M A Pavlova, P R Makarevich, T I Shirokolobova
The study of the most abundant components in freshwater plankton in the Gulf of Ob and Taz Estuary in the summer-autumn season has demonstrated that the abundance and biomass of bacteria are stable and typical for mesotrophic waters during active microalgae vegetation. The abundance of viral particles varies in the range which is reported for unproductive or medium-productive water bodies. The environmental factors affecting affect the development and patterns of bacterio- and virioplankton distribution are considered...
November 2016: Doklady Biological Sciences: Proceedings of the Academy of Sciences of the USSR, Biological Sciences Sections
https://www.readbyqxmd.com/read/28058602/western-siberia-rivers-and-the-boundaries-between-chromosomal-races-of-the-common-shrew-sorex-araneus-l-lipotyphla-mammalia
#9
B I Sheftel, T B Demidova, V O Burskaya
In Western Siberia, most boundaries between common shrew chromosomal races have been found to pass along the banks of rivers, mainly those flowing in the meridional direction. The races Serov and Novosibirsk co-inhabited the right bank of the Irtysh. The easternmost point of the Novosibirsk race has been found on the middle Yenisei River, while the race Tomsk in this area was only on the right (eastern) bank.
November 2016: Doklady Biological Sciences: Proceedings of the Academy of Sciences of the USSR, Biological Sciences Sections
https://www.readbyqxmd.com/read/28058601/the-first-finding-of-a-rhinoceros-of-the-genus-stephanorhinus-in-arctic-asia
#10
I V Kirillova, O F Chernova, V V Kukarskikh, F K Shidlovskiy, O G Zanina
The first skull of a rhinoceros of the genus Stephanorhinus has been found above the Arctic Circle on the middle Chondon River (Yakutia, Russia). This is the northernmost finding that extends significantly the genus range and provides additional information about the diet and environment of a genus representative. Plant remnants from the maxillary tooth cavities were identified as belonging to trees (Larix, Betula), shrubs (Ericaceae), mosses (Aulacomnium sp., Polytrichum sp.), herbs (Dicotyledones) and grasses (Poaceae), but not to sedges (Cyperaceae)...
November 2016: Doklady Biological Sciences: Proceedings of the Academy of Sciences of the USSR, Biological Sciences Sections
https://www.readbyqxmd.com/read/28058600/the-japanese-tree-frog-hyla-japonica-one-of-the-most-cold-resistant-species-of-amphibians
#11
D I Berman, E N Meshcheryakova, N A Bulakhova
The Japanese tree frog, a representative of the Manchurian fauna, is characterized by an outstanding cold resistance among the anuran amphibian species studied so far. Almost 70% of the specimens from the population inhabiting the middle Amur River withstand the cooling down to-30°C; some animals, down to-35°C. This exceeds more than twofold the cold hardiness of the wood frog (Lithobates sylvaticus LeConte, 1825), which has been considered earlier to be the most cold-resistant species. The ability of H. japonica to survive for four months in the frozen state at low temperatures makes this species independent of the temperature overwintering conditions...
November 2016: Doklady Biological Sciences: Proceedings of the Academy of Sciences of the USSR, Biological Sciences Sections
https://www.readbyqxmd.com/read/28058599/epiphytic-bacterial-communities-of-the-alga-fucus-vesiculosus-in-oil-contaminated-water-areas-of-the-barents-sea
#12
D V Pugovkin, A Liaimer, J B Jensen
Taxonomic compositions of epiphytic bacterial communities in water areas differing in levels of oil pollution were revealed. In total, 82 bacterial genera belonging to 16 classes and 11 phyla were detected. All detected representatives of epiphytic bacterial communities belonged to the phyla Actinobacteria, Bacteroidetes, Planctomycetes, Proteobacteria, Verrucomicrobia, Acidobacteria, Cyanobacteria, Firmicutes, and Fusobacteria and candidate division TM7. The ratio of the phyla in the communities varied depending on the levels of oil pollution...
November 2016: Doklady Biological Sciences: Proceedings of the Academy of Sciences of the USSR, Biological Sciences Sections
https://www.readbyqxmd.com/read/28058598/the-first-finding-of-asian-black-bear-carnivora-ursidae-ursus-euarctos-thibetanus-g-cuvier-1823-in-the-late-pleistocene-of-northern-eurasia
#13
P A Kosintsev, M P Tiunov, D O Gimranov, V S Panov
An M1 tooth of Asian black bear (Ursus (Euarctos) thibetanus G. Cuvier, 1823) was found in deposits of the Tetyukhinskaya cave (Middle Sikhote-Alin, 44°35'N, 135°36'E). This finding is the first reliable evidence of Asian black bear's presence in Pleistocene of Primorye. Its morphological and morphometric descriptions are given. The period of inhabitation of U. (E.) thibetanus determined based on the radiocarbon date obtained during the study of the tooth, is 39 874 ± 133 BP (NSK-850, UGAMS-21786), which corresponds to the middle of Marine Isotope Stage 3 (MIS 3) of Late Pleistocene...
November 2016: Doklady Biological Sciences: Proceedings of the Academy of Sciences of the USSR, Biological Sciences Sections
https://www.readbyqxmd.com/read/27822761/erratum-to-new-data-on-avifauna-of-the-ustyurt-plateau-in-the-holocene
#14
A E Nekrasov, P A Kosintsev, Z Samashev, A Ongar, T V Loshakova, V N Bolshakov
No abstract text is available yet for this article.
September 2016: Doklady Biological Sciences: Proceedings of the Academy of Sciences of the USSR, Biological Sciences Sections
https://www.readbyqxmd.com/read/27822760/cyanobacteria-in-iron-banded-formations-of-the-kursk-magnetic-anomaly
#15
A Yu Rozanov, M M Astafieva, L V Zaitseva, N A Alfimova, S B Felitsyn
Fossilized cyanobacteria(?) represented by trichomes enclosed in common sheaths were detected in early Proterozoic iron banded formations of the Kursk magnetic anomaly (limonite-martite ores of the Lebedinsky mine and iron banded formations of the Korobkovskoye deposit). These fossils morphologically similar to current representatives of the genus Microcoleus were buried in situ.
September 2016: Doklady Biological Sciences: Proceedings of the Academy of Sciences of the USSR, Biological Sciences Sections
https://www.readbyqxmd.com/read/27822759/cytokine-pattern-of-the-breast-tumor-supernatant
#16
A I Autenshlyus, T A Kunts, K V Karpukhina, E S Mikhaylova, N A Varaksin, I O Marinkin, V V Lyakhovich
Cytokine production was evaluated in supernatants of cultured tumor cells that were obtained by biopsy of the breast invasive ductal carcinoma (IDC) and breast fibroadenoma (FA) and grown in vitro. In the IDC supernatants, the concentrations of pro-inflammatory (pro-oncogenic) cytokines IL-17, IL-18, and IFNγ and of IL-1 receptor antagonist were significantly higher than in the FA cell supernatants. The concentrations of anti-inflammatory cytokine IL-10 and MCP-1 protein in supernatants of IDC cells were significantly lower than those determined in FA supernatants...
September 2016: Doklady Biological Sciences: Proceedings of the Academy of Sciences of the USSR, Biological Sciences Sections
https://www.readbyqxmd.com/read/27822758/effect-of-polypeptides-from-sea-anemone-heteractis-crispa-on-the-rodent-blood-pressure-heart-rate-and-hemostasis
#17
L A Skobtsova, I A Dyachenko, Ya A Andreev, Yu A Logashina, A N Murashev, E V Grishin
АРНС1-3 peptides, modulators of TRPV1 receptors, have been administered to SD rats to study their influence on the animal hemostatic system, heart rate, and blood pressure. None of АЗРС1-3 polypeptides have any effect on the hemostatic system. Both АРНС1 and АРНС2 polypeptides increased significantly the heart rate, but they did not affect blood pressure, which was probably caused by an ability of these polypeptides to modify animal thermoregulation.
September 2016: Doklady Biological Sciences: Proceedings of the Academy of Sciences of the USSR, Biological Sciences Sections
https://www.readbyqxmd.com/read/27822757/involvement-of-dihydropyridine-sensitive-calcium-channels-in-high-asynchrony-of-transmitter-release-in-neuromuscular-synapses-of-newborn-rats
#18
V F Khuzakhmetova, L F Nurullin, E A Bukharaeva, E E Nikolsky
Experiments on neuromuscular synapses of rats at different stages of ontogenesis have been performed. It has been found that one of the reasons of higher asynchrony of the release of single quanta of acetylcholine in the synapses of newborn animals is the activity of the presynaptic dihydropyridine-sensitive calcium channels of the L-type.
September 2016: Doklady Biological Sciences: Proceedings of the Academy of Sciences of the USSR, Biological Sciences Sections
https://www.readbyqxmd.com/read/27822756/the-time-scale-of-adaptation-in-tonal-sequence-processing-by-the-mouse-auditory-midbrain-neurons
#19
E S Malinina, M A Egorova, G D Khorunzhii, A G Akimov
The time course of poststimulatory adaptation of the inferior colliculus central nucleus (ICC) of CBB6F1 hybrid mice to sound sequences, specifically, series of four tonal stimuli presented at intervals of 0, 2, 4, 10, 20, 50, 100, 200, 500, 700, 1000, and 1500 ms were studied. Assessment of the adaptation of the entire neuronal population have shown that, at an interstimulus interval of 0-200 ms, the response to the first tone in a series is significantly stronger than those to the second to fourth tones, the strengths of the latter three responses not differing significantly from one another...
September 2016: Doklady Biological Sciences: Proceedings of the Academy of Sciences of the USSR, Biological Sciences Sections
https://www.readbyqxmd.com/read/27822755/myosin-accelerates-synaptic-vesicle-recycling-in-the-motor-nerve-endings
#20
P N Grigoryev, A L Zefirov
Neurotransmitter release and exocytosis of synaptic vesicles in the motor nerve endings of the frog cutaneous-pectoris muscle were studied using electrophysiological and optical methods under the conditions of inhibition of the myosin light-chain kinase and non-muscle myosin by the specific inhibitors ML-7 (12 μM) and (-)-blebbistatin (100 μM). At high-frequency stimulation (20 pulses/s), these inhibitors strengthened suppression of transmitter release during the first 20-25 s and slowed down the release of the fluorescent dye FM 1-43...
September 2016: Doklady Biological Sciences: Proceedings of the Academy of Sciences of the USSR, Biological Sciences Sections
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