Publications by authors named "V A Shepelev"
Activated carbon filters are used for the removal of hazardous gases from the air. This research applied vibrational spectroscopy methods, including Fourier-transform infrared spectroscopy and Raman spectroscopy to characterize hydrogen sulfide adsorption on impregnated carbon materials with metals having reactivity toward hydrogen sulfide. The Fourier-transform infrared spectroscopy results demonstrated the formation of a new chemical bond between the impregnating metals and the sulfur, indicated by the appearance of a new band at 618 cm.
View Article and Find Full Text PDFArticle Synopsis
- Apes have two sex chromosomes: the essential Y chromosome for male reproduction and the X chromosome necessary for both reproduction and cognition, with differences in mating patterns affecting their function.
- Studying these chromosomes is challenging due to their repetitive structures, but researchers created gapless assemblies for five great apes and one lesser ape to explore their evolutionary complexities.
- The Y chromosomes are highly variable and undergo significant changes compared to the more stable X chromosomes, and this research can provide insights into human evolution and aid in the conservation of endangered ape species.
Article Synopsis
- The study focuses on the genomic structure of crab-eating and rhesus macaques, addressing the need for better understanding of their genetic differences and similarities.
- Researchers provide a complete genome assembly for the crab-eating macaque and 20 haplotype-resolved assemblies to explore significant genomic variations between the two species and their implications.
- Findings include that macaques have lower segmental duplication and longer centromeres than humans, as well as differences in genetic variants and alternative splicing, which may relate to metabolic and evolutionary traits, enhancing their use in biomedical research.
Article Synopsis
- Human centromeres are challenging to sequence due to their large size and repetitive nature, limiting our understanding of their variation and evolutionary function.
- Using long-read sequencing, researchers completely sequenced and assembled all centromeres from a second human genome, revealing a significant increase in genetic variation and size differences between centromeres.
- Comparative analysis of centromeric sequences across species, including humans and great apes, highlights the rapid evolution of α-satellite DNA and suggests limited recombination between chromosome arms, aiding in studying centromeric DNA evolution.
Article Synopsis
- Apes have two main sex chromosomes, X and Y, where Y is crucial for male reproduction and its deletions can lead to infertility, while X is important for both reproduction and brain function.
- Recent advancements in genomic techniques helped researchers create complete structures of the X and Y chromosomes for multiple great ape species, allowing them to explore their evolutionary complexities.
- Findings indicate that Y chromosomes are highly variable and undergo rapid changes due to unique genetic regions and transposable elements, while X chromosomes are more stable, highlighting differing evolutionary paths among great ape species.