575 results match your criteria: "Universitetskaya emb[Affiliation]"
Comp Cytogenet
December 2024
Zoological Institute of the Russian Academy of Sciences, Universitetskaya Emb. 1, Saint Petersburg, 199034, Russia Zoological Institute of the Russian Academy of Sciences Saint Petersburg Russia.
The paper elaborates theoretical basis of the origin of aphid cyclical parthenogenesis in view of the original life of these insects in strobiloid galls on spp. The period of gall opening is greatly extended in time, which prevents normal panmixia and creates a selective advantage for parthenogenetic reproduction. Migration of aphids to secondary host plants, on which closed galls never form, parthenogenetic reproduction on these plants, and the subsequent simultaneous return of "remigrants" to the main host plant make it possible to synchronize the development of the bisexual generation and achieve mass panmixia at the end of the life cycle only; it coincides with the end of summer growth shoots or the autumn end of the vegetation period as a whole.
View Article and Find Full Text PDFInt J Parasitol Parasites Wildl
December 2024
A.N. Severtsov Institute of Ecology and Evolution, Russian Academy of Sciences, 33 Leninskiy Av., 119071 Moscow, Russia.
The family Hippoboscidae, commonly known as "louse flies," comprises pupiparous Diptera that are ectoparasites of birds and mammals, with significant impacts on their hosts and epidemiological importance. The louse fly fauna of Vietnam is relatively understudied compared to other countries in the Southeast Asia region. In this study, we describe a new species of the genus Speiser, 1905 (Diptera: Hippoboscidae), , collected from the lesser coucal (Gmelin, JF, 1788) in Cat Tien National Park, Vietnam.
View Article and Find Full Text PDFInt J Mol Sci
November 2024
St. Petersburg Branch, Vavilov Institute of General Genetics, Russian Academy of Sciences, Universitetskaya Emb. 7/9, 199034 St. Petersburg, Russia.
is the oldest classic model object in developmental genetics. It may seem that various structures of the fruit fly at all developmental stages have been well studied and described. However, recently we have shown that some specialized structures of the eggshell contain an amyloid fibril network.
View Article and Find Full Text PDFNanomaterials (Basel)
December 2024
Moscow Center for Advanced Studies, Kulakova Str. 20, Moscow 123592, Russia.
Transition metal dichalcogenides (TMDCs), particularly molybdenum disulfide (MoS), have gained significant attention in the field of optoelectronics and photonics due to their unique electronic and optical properties. The integration of TMDCs with plasmonic materials allows to tailor the optical response and offers significant advantages for photonic applications. This study presents a novel approach to synthesize MoS-Au nanocomposites utilizing femtosecond laser ablation in liquid to achieve tunable optical properties in the near-infrared (NIR) region.
View Article and Find Full Text PDFNanomaterials (Basel)
November 2024
Faculty of Physics, St. Petersburg State University, Universitetskaya Emb. 13B, 199034 St. Petersburg, Russia.
This study investigates the growth of gallium arsenide nanowires, using lead as a catalyst. Typically, nanowires are grown through the vapor-solid-liquid mechanism, where a key factor is the reduction in the nucleation barrier beneath the catalyst droplet. Arsenic exhibits limited solubility in conventional catalysts; however, this research explores an alternative scenario in which lead serves as a solvent for arsenic, while gallium and lead are immiscible liquids.
View Article and Find Full Text PDFBiochem Biophys Res Commun
January 2025
Laboratory of Structural Dynamics, Stability and Folding of Proteins, Institute of Cytology, Russian Academy of Sciences, 4 Tikhoretsky Ave., 194064, St. Petersburg, Russia. Electronic address:
The explosive growth in the number of works addressing the phase separation of intrinsically disordered proteins has driven both the development of new approaches and the optimization of existing methods for biomolecular condensate visualization. In this work, we studied the potential use of the fluorescent dye ANS as a sensor for liquid-liquid phase separation (LLPS), focusing on visualizing condensates formed by the stress-granules scaffold protein G3BP1. Using fluorescence lifetime imaging microscopy (FLIM), we demonstrated that ANS can accumulate in RNA-induced G3BP1 condensates in aqueous solutions, but not in G3BP1 condensates formed under macromolecular crowding conditions in highly concentrated PEG solutions.
View Article and Find Full Text PDFThe caliscelid genus, Chirodisca Emeljanov, 1996 (Caliscelinae, Caliscelini), is reviewed. Adults and 5th instar nymph of Chirodisca astyages (Dlabola, 1982) and adults of Ch. eximia (Stål, 1859) are described and illustrated on the basis of type specimens and other material examined.
View Article and Find Full Text PDFOrthopteran surveys were recently conducted at the Panti Forest Reserve in Johor State of Peninsular Malaysia. Based on new material, three species new to science are described here: Agryllus sori Tan, Muhammad & Gorochov, sp. nov.
View Article and Find Full Text PDFZootaxa
September 2024
Institut de Systématique; Evolution; Biodiversité (ISYEB); Muséum national d'Histoire naturelle; CNRS; SU; EPHE-PSL; UA; 57 rue Cuvier; CP 50; 75231 Paris Cedex 05; France.
Recent fieldwork in eastern Sabah led to the discovery of new little-known crickets from the subfamily Pteroplistinae (Orthoptera, Grylloidea). Three new species are described: Tembelingiola biaculeata sp. nov.
View Article and Find Full Text PDFA revision of the chigger mite collection in the KwaZulu-Natal Museum (NM, Pietermaritzburg, South Africa) resulted in finding holotypes or paratypes for 15 of the 51 species described by R.F. Lawrence in 1948-1951 and originally deposited in this museum.
View Article and Find Full Text PDFA new genus, Petocica gen. n., with a type species, Petocica perforata sp.
View Article and Find Full Text PDFThe female of Cordylocras abscondita de Paz & Popovici sp. nov., is described and illustrated from the province of Salamanca (Western Spain).
View Article and Find Full Text PDFThree species belonging to the family Cosmopterigidae are treated: Anatrachyntis koreana sp. nov. is described as new to science, Anatrachyntis ptilodelta (Meyrick, 1922) and Macrobathra nomaea Meyrick, 1914 are reported for the first time in Korea.
View Article and Find Full Text PDFThe paper provides a detailed morphological description of a previously unknown female of Supella eocenica Anisyutkin et Perkovsky, 2023. The structure of the tegmina and wings of the type species of the genus Supella, S. longipalpa (Fabricius, 1798), is also redescribed.
View Article and Find Full Text PDFA new species of the leafhopper genus Dryadomorpha Kirkaldy, 1906 (tribe Drabescini), D. tricornis sp. n.
View Article and Find Full Text PDFA new species of the ricaniid genus Tarehylava Stroiński, 2021, T. gorgona sp. nov.
View Article and Find Full Text PDFA review of the ground beetle genus Anisodactylus Dejean, 1829 of the Russian Far East is given. The fauna of this region includes four species of two subgenera: A. (Pseudanisodactylus) signatus (Panzer, 1796), A.
View Article and Find Full Text PDFThe genus Symphytopria Kieffer, 1910 is revised based on an examination of the holotypes of all described species. Symphytopria fusciceps Kieffer, 1910, syn. nov.
View Article and Find Full Text PDFThe genus Symplanella Fennah, 1987 is revised, with the type species, Symplanella breviceps Fennah, 1987, is redescribed and illustrated based on new material from Thailand. A new subgenus, Bambunella subgen. nov.
View Article and Find Full Text PDFThe nogodinid genus Goniopsara Metcalf, 1952 is revised. The type species of the genus, Goniopsara mystica (Melichar, 1899), is redescribed and illustrated along with male genitalia structure is examined and described for the first time. A new species, Goniopsara ridens sp.
View Article and Find Full Text PDFThree species of the genus Ambositra: A. epicnemia sp. nov.
View Article and Find Full Text PDFZootaxa
November 2024
Russian Entomological Society; Nzhny Novgorod Branch; P.O. Box 97; Nizhny Novgorod 603009; Russia.
A new species, Pediasia gorbunovi sp. nov., is described from Kyrgyzstan, Baidulu Mountains, at Dolon Pass (41°52'40"N, 75°42'11"E, 2790 m altitude).
View Article and Find Full Text PDFNanomaterials (Basel)
November 2024
Faculty of Physics, St. Petersburg State University, Universitetskaya Emb. 13B, 199034 St. Petersburg, Russia.