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

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https://read.qxmd.com/read/30603948/the-change-in-the-entomopathogenic-properties-in-streptomycin-resistant-bacillus-thuringiensis
#1
O V Polenogova, V V Glupov
Streptomycin-resistant strains (StrR ) of the entomopathogenic bacteria Bacillus thuringiensis ssp. galleriae (Btg) have been obtained. Assessment of growth rate of Btg 69-6 colonies revealed significant difference between the initial strain StrS sensitive to antibiotics and StrR . Decrease in susceptibility of instar IV larvae of Galleria mellonella to Btg 69-6 StrR by a factor of eight compared to Btg 69-6 StrS has also been recorded. In Btg 190 StrR , the insecticidal activity decreased by a factor of five...
November 2018: Doklady Biological Sciences: Proceedings of the Academy of Sciences of the USSR, Biological Sciences Sections
https://read.qxmd.com/read/30603947/silver-containing-humic-substance-based-nanocomposites-agents-for-healing-of-potatoes-from-the-ring-rot
#2
I A Graskova, A I Perfileva, O A Nozhkina, B G Sukhov, G P Aleksandrova, B A Trofimov
The influence of silver-containing humic substance (HS)-based nanocomposites (NCs) obtained from mud, shale, and coals of three kinds of deposits in Mongolia on the viability and ability to biofilm formation of a phytopathogenic gram-positive bacterium Clavibacter michiganensis subsp. sepedonicus (Cms), as well as peroxidase activity and potato plant growth in vitro, has been investigated. The maximum reduction of the viability of bacterial cells was found in the case of incubation with HS-mu/Ag NC and HS-coal/Ag NC...
November 2018: Doklady Biological Sciences: Proceedings of the Academy of Sciences of the USSR, Biological Sciences Sections
https://read.qxmd.com/read/30603946/a-new-interpretation-of-the-crocodile-forelimb-morphological-features-as-adaptation-to-parasagittal-quadrupedal-locomotion-on-the-ground
#3
D I Pashchenko
We describe the crocodile forelimb features that distinguish them from other reptiles. Reduction of the clavicle and a change in the coracoid shape seem to be another way of maintaining the efficient step length, while the antebrachium and manus transformations create peculiar oblique manus position on the ground to promote the forelimb parasagittalization.
November 2018: Doklady Biological Sciences: Proceedings of the Academy of Sciences of the USSR, Biological Sciences Sections
https://read.qxmd.com/read/30603945/first-finding-of-representatives-of-the-eccrinida-order-in-the-digestive-tract-of-king-crab-specie-from-the-barents-sea
#4
L V Pavlova
This is the first report on the finding of large intra-intestinal symbionts belonging to the order Eccrinida in crab-like decapod crustaceans of the family Lithodidae, Paralithodes camtschaticus and Lithodes maja, inhabiting the Barents Sea. Studies have been regularly conducted since the early 2000s in Kola Bay and in one of the inlets of the Eastern Murman Coast. Since 2005, Eccrinida representatives (presumably, a new species of the genus Arundinula) have been found in the guts of the red king crab. A brief description of the endosymbionts and data on their frequency of occurrence are presented...
November 2018: Doklady Biological Sciences: Proceedings of the Academy of Sciences of the USSR, Biological Sciences Sections
https://read.qxmd.com/read/30603944/discovery-of-trunk-coelomoducts-in-hemichordata
#5
A I Lukinykh, O V Ezhova, S V Krylenko, S V Galkin, A V Gebruk, V V Malakhov
Histological examination of a specimen of a deep-sea enteropneusts that belongs to a yet undescribed species (Torquaratoridae gen. sp.) revealed numerous trunk coelomoducts. They open into the genital wing coelom as a typical funnels; short ducts communicate with environment through pores located on the outer side of the genital wings. Total number of coelomoducts in a specimen is estimated at several thousand. Trunk coelomoducts have not been found earlier in any member of the phylum. We believe that the release of the male gonad products occurs through coelomoducts of Torquaratoridae gen...
November 2018: Doklady Biological Sciences: Proceedings of the Academy of Sciences of the USSR, Biological Sciences Sections
https://read.qxmd.com/read/30603943/the-earliest-asian-duck-anseriformes-romainvillia-and-the-origin-of-anatidae
#6
N V Zelenkov
A new species of the extinct duck Romainvillia from the Upper Eocene of Kazakhstan is described. This is the earliest duck from Asia, the first record of Romainvillia beyond France and the first reliable evidence of the presence of Romainvilliinae (regarded here as family) in Asia. This occurrence shows a wide range of Romainvillia and suggests a greater similarity of Late Eocene faunas of Western Europe and Asia than it was previously thought. The origin of Romainvilliidae and their presumable descendants Anatidae may be connected with adaptation to a new biotope, the shallowing Late Eocene epicontinental Asian basins (due to a global decrease in sea level)...
November 2018: Doklady Biological Sciences: Proceedings of the Academy of Sciences of the USSR, Biological Sciences Sections
https://read.qxmd.com/read/30603942/investigation-of-whalebone-from-the-miocene-kovran-locality-kamchatka-krai-russia
#7
K K Tarasenko, A V Lopatin, A V Pakhnevich, E S Kovalenko, M M Murashev, K M Podurets
New information on the microstructures, general morphology, and features of preservation of plates of a whalebone from the Miocene Kovran locality in the Kamchatka Peninsula are provided. The plates have a chevron-like bend which is absent in extant Balaenopteridae, Balaenidae, and Eschrichtiidae. This shape is possibly related to the filtration mechanism characteristic of these whales.
November 2018: Doklady Biological Sciences: Proceedings of the Academy of Sciences of the USSR, Biological Sciences Sections
https://read.qxmd.com/read/30603941/sympathetic-innervation-of-stomach-in-postnatal-development
#8
A I Emanuilov, P M Masliukov, A D Nozdrachev
Sympathetic innervation of the stomach was studied in rats by the method of retrograde axon transport of Fast Blue in postnatal ontogenesis. The number of labeled neurons increased in the first 10 days of life and then did not change until the senescence. All labeled neurons innervating the stomach contain the catecholamine synthesis enzyme, tyrosine hydroxylase. The proportion of labeled neuropeptide Y-immunopositive neurons did not change in the development, the percentage of labeled calbindin-immunoreactive neurons decreased in the first month of life...
November 2018: Doklady Biological Sciences: Proceedings of the Academy of Sciences of the USSR, Biological Sciences Sections
https://read.qxmd.com/read/30402763/tannosomes-in-the-pericarp-cells-of-maloideae-rosaceae
#9
T Kh Kumachova, A S Voronkov, Yu V Orlova, V K Zhirov
Data on the presence of structural units termed tannosomes in the pericarp cells of Maloideae has been obtained for the first time. Tannosomes merge in the vacuoles to form "tannoglobules."
September 2018: Doklady Biological Sciences: Proceedings of the Academy of Sciences of the USSR, Biological Sciences Sections
https://read.qxmd.com/read/30402762/%C3%AE-fetoprotein-influence-on-the-conversion-of-na%C3%A3-ve-t-helpers-into-memory-t-cell-effector-subpopulations
#10
S A Zamorina, V P Timganova, M S Bochkova, P V Khramtsov, K A Fomicheva, M B Rayev, V A Chereshnev
The effect of native α-fetoprotein (AFP) on the conversion of naïve T-helpers into central memory T-cells (TCM) and effector subpopulations of the preterminally differentiated (TEM) and terminally differentiated (TEMRA) memory T-cells was studied. AFP was found to prevent the conversion of naïve T-helpers into effector subpopulations of memory T cells (TEM and TEMRA) while reducing the total production of IL-4 and IFN-γ by the studied cell populations. The data reveal a new role of AFP in the immune tolerance formation during pregnancy...
September 2018: Doklady Biological Sciences: Proceedings of the Academy of Sciences of the USSR, Biological Sciences Sections
https://read.qxmd.com/read/30402761/new-data-on-dinosaurs-of-the-crimean-peninsula
#11
A V Lopatin, A O Averianov, V R Alifanov
Reexamination of the holotype of Riabininohadros weberae from the Upper Cretaceous (upper Maastrichtian) of the Crimean Peninsula (Besh-Kosh) allowed determination of previously unknown elements of the femur, astragalus, and calcaneus. This taxon shows a set of primitive characters observed in iguanodontids and basal ornithischians and is referred to as Styracosterna indet. The second dinosaur specimen from Crimea (Aleshino) is a fragmentary skeleton, including cervical and dorsal vertebrae. It possibly belongs to advanced iguanodontids or primitive hadrosauroids...
September 2018: Doklady Biological Sciences: Proceedings of the Academy of Sciences of the USSR, Biological Sciences Sections
https://read.qxmd.com/read/30402760/evaluation-of-the-applicability-of-the-comparatory-method-for-species-diagnosis-of-unionidae-bivalvia-by-genetic-analysis
#12
V V Bogatov, T V Neretina, A S Anisimova, A Abdrakhmanov
Five genetically distant groups of mussels possessing high intragroup homogeneity were identified among 65 specimens of 14 East European Unionidae "comparatory species" by genetic analysis of nuclear and mitochondrial markers. By shell morphology other than the shape of the convex contour of the shell, the identified groups correspond to five "taxonomic species" according to Zhadin's classification. The use of the comparatory method for Unionidae species identification is unjustified.
September 2018: Doklady Biological Sciences: Proceedings of the Academy of Sciences of the USSR, Biological Sciences Sections
https://read.qxmd.com/read/30402759/the-natural-abundance-of-heavy-nitrogen-isotope-15n-in-plants-increases-near-a-large-copper-smelter
#13
O E Chashchina, A A Chibilev, D V Veselkin, N B Kuyantseva, A G Mumber
The ratio of stable isotopes of nitrogen (15 N and 14 N) has been assessed in leaves of the forest plants from different functional groups (with ectomycorrhiza, ericoid, and arbuscular mycorrhiza; in a nitrogen-fixing symbiosis) under the conditions of strong transformation of ecosystems by the Karabashsky Copper-Smelting Plant effluents in the Southern Urals. The abundance of 15 N in the plants generally increases in polluted habitats. The abundance of the heavy isotope 15 N increases significantly with pollution in ericaceous dwarf shrubs (by 3...
September 2018: Doklady Biological Sciences: Proceedings of the Academy of Sciences of the USSR, Biological Sciences Sections
https://read.qxmd.com/read/30402758/the-results-of-sable-martes-zibellina-reintroduction-demonstrate-the-founder-effect
#14
V G Monakhov
The relative abundance of intrapopulation groups with different parameters of skull size, coat color, and expression of an epigenetic cranial trait was compared in autochthonous, reintroduced, and donor populations of sable. Recovery of the species resources and broad variability of the phenotypic trait complex in the newly fomned populations were observed. A large proportion of the animals had the phenotype that included large size, dark coat color, and pronounced expression of a specific phene trait (foramen in the condylar fossa) and was not characteristic of the neighboring autochthonous populations...
September 2018: Doklady Biological Sciences: Proceedings of the Academy of Sciences of the USSR, Biological Sciences Sections
https://read.qxmd.com/read/30402757/a-mass-burial-of-fossil-lions-carnivora-felidae-panthera-leo-ex-gr-fossilis-spelaea-from-eurasia
#15
D O Gimranov, V G Kotov, M M Rumyantsev, V I Silaev, A G Yakovlev, T I Yakovleva, N V Zelenkov, M V Sotnikova, M M Devyashin, N A Plasteeva, N E Zaretskaya, I M Nurmukhametov, N G Smirnov, P A Kosintsev
The vertebrate fauna from the cave deposits in Imanai Cave in the Southern Urals (53°02' N, 56°26'E) has been studied. It contains 715 bones that belonged to at least 11 individuals of fossil lion (Panthera (Leo) ex gr. fossilis-spelaea). It has been established that this is one of the largest Eurasian burial sites of fossil lions. The bones were accumulated due to the natural death of animals inside the cave. The age and sex estimations have shown that at least six adult males and five adult females died there...
September 2018: Doklady Biological Sciences: Proceedings of the Academy of Sciences of the USSR, Biological Sciences Sections
https://read.qxmd.com/read/30402756/dynamics-of-estradiol-level-during-metamorphosis-in-the-daubed-shanny-leptoclinus-maculatus-fries-1838-from-spitsbergen-island
#16
N N Nemova, N L Rendakov, S N Pekkoeva, K M Nikerova, S A Murzina
The estradiol content of muscles during metamorphosis in the daubed shanny (Leptoclinus maculatus) from different fjords of Spitsbergen Island, Svalbard, have been studied using mass spectrometry. The level of estradiol at the L4 larval stage of development is significantly lower than at the L2 stage. Values of this parameter in adults are significantly higher than in post-larvae (stage L5). Variations in the estradiol level during metamorphosis can be associated with the growth stimulation and regulation of the process...
September 2018: Doklady Biological Sciences: Proceedings of the Academy of Sciences of the USSR, Biological Sciences Sections
https://read.qxmd.com/read/30402755/activity-of-the-enzymes-of-the-energy-and-carbohydrate-metabolism-in-the-organs-of-the-three-spined-stickleback-gasterosteus-aculeatus-from-different-biotopes-of-the-white-sea
#17
M V Churova, N S Shulgina, N N Nemova
The activity of the key enzymes of the energy and carbohydrate metabolism (cytochrome c oxidase, lactate dehydrogenase, aldolase, and glucose-6-phosphate dehydrogenase) have been studied in the three-spined stickleback Gasterosteus aculeatus spawning in different biotopes of the White Sea (Sel'dyanaya Bay, Sukhaya Salma Strait, and Kolyushkovaya Lagoon). It was found that individuals of stickleback from different spawning grounds differed mainly in the level of anaerobic metabolism and in the degree of utilization of carbohydrates during glycolysis...
September 2018: Doklady Biological Sciences: Proceedings of the Academy of Sciences of the USSR, Biological Sciences Sections
https://read.qxmd.com/read/30402754/morphological-and-taxonomic-interpretation-of-orestovia-and-schuguria-enigmatic-devonian-plants-from-russia
#18
A V Gomankov
A detailed study of the external and internal surfaces of the cuticle of Orestovia and Schuguria using scanning electron microscopy and confocal laser microscopy has shown that the structures formerly interpreted as stomata or reproductive organs are most likely to be gland cells producing mucilage. Each structure represents a single large cell with a complex aperture on the external wall. In addition, a reproductive organ similar to multilocular sporangia known in brown algae of the order Ectocarpales has been found in attachment to a compression fossil of Orestovia...
September 2018: Doklady Biological Sciences: Proceedings of the Academy of Sciences of the USSR, Biological Sciences Sections
https://read.qxmd.com/read/30402753/differences-in-the-postural-responses-to-approaching-and-receding-sound-images-in-subjects-with-different-perceptual-styles
#19
I G Andreeva, A P Gvozdeva, E V Bobrova, Yu P Gerasimenko
A hypothesis on the universal character of perceptual style for analyzing the surrounding space during sensory interactions has been tested. The indices of postural responses to moving and stationary auditory images in the groups of field-dependent and field-independent subjects, i.e., those who perceive spatial information about the object considering or ignoring the background, respectively, have been investigated. The differences in the sway parameters in both groups were revealed only in the case of moving auditory images...
September 2018: Doklady Biological Sciences: Proceedings of the Academy of Sciences of the USSR, Biological Sciences Sections
https://read.qxmd.com/read/30402752/morphological-study-of-myelinated-fibers-of-the-sciatic-nerve-in-mice-after-space-flight-and-readaptation-to-the-conditions-of-earth-gravity
#20
P N Rezvyakov, G F Shaimardanova, A N Lisukov, M S Kuznetsov, R R Islamov, E E Nikolskiy
We revealed a decrease in the thickness of the myelin sheath and myelin delamination in the tibial nerve of C57BL/6N mice after a 30-day flight aboard the biosatellite Bion-M1. The processes of myelin degeneration continued for seven days after return of the animals to Earth and adaptation to the conditions of natural gravity. Our data add to hypothesis on the role of neurogenic component in pathogenesis of hypogravity motor syndrome.
September 2018: Doklady Biological Sciences: Proceedings of the Academy of Sciences of the USSR, Biological Sciences Sections
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