2,814 results match your criteria indicates contributions


Seasonal variation and sources of carbonaceous species and elements in PM and PM over the eastern Himalaya.

Environ Sci Pollut Res Int 2021 May 14. Epub 2021 May 14.

CSIR-National Physical Laboratory, Dr. K. S. Krishnan Road, New Delhi, 110 012, India.

The study represents the seasonal characteristics (carbonaceous aerosols and elements) and the contribution of prominent sources of PM and PM in the high altitude of the eastern Himalaya (Darjeeling) during August 2018-July 2019. Carbonaceous aerosols [organic carbon (OC), elemental carbon (EC), and water soluble organic carbon (WSOC)] and elements (Al, Fe, Ti, Cu, Zn, Mn, Cr, Ni, Mo, Cl, P, S, K, Zr, Pb, Na, Mg, Ca, and B) in PM and PM were analyzed to estimate their possible sources. The annual concentrations of PM and PM were computed as 37±12 μg m and 58±18 μg m, respectively. Read More

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Changes in Surface Free Energy and Surface Conductivity of Carbon Nanotube/Polyimide Nanocomposite Films Induced by UV Irradiation.

ACS Appl Mater Interfaces 2021 May 14. Epub 2021 May 14.

Institute of Problems of Chemical Physics of Russian Academy of Sciences, Academician Semenov av., 1, Chernogolovka 142432, Russia.

Changes in surface energy and electrical conductivity of polyimide (PI)-based nanocomposite films filled with carbon nanotubes (CNTs) induced by UV exposure are gaining considerable interest in microelectronic, aeronautical, and aerospace applications. However, the underlying mechanism of PI photochemistry and oxidation reactions induced by UV irradiation upon the surface in the presence of CNTs is still not clear. Here, we probed the interplay between CNTs and PIs under UV exposure in the surface properties of CNT/PI nanocomposite films. Read More

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Bioretention systems for stormwater management: Recent advances and future prospects.

J Environ Manage 2021 May 10;292:112766. Epub 2021 May 10.

Department of Civil and Environmental Engineering, National University of Singapore, Singapore. Electronic address:

Bioretention is a popular stormwater management strategy that is often utilized in urban environments to combat water quality and hydrological impacts of stormwater. This goal is achieved by selective designing of a system, which consists of suitable vegetation at the top planted on an engineered media with drainage system and possible underdrain at the bottom. Bibliometric analysis on bioretention studies indicates that most of the original research contributions are derived from a few countries and selected research groups. Read More

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Formation and internal ordering of periodic microphases in colloidal models with competing interactions.

Soft Matter 2021 May 7. Epub 2021 May 7.

Institute of Physical Chemistry Polish Academy of Sciences, Kasprzaka 44/52, 01-224 Warsaw, Poland.

Theory and simulations predict that colloidal particles with short-range attractive and long-range repulsive interactions form periodic microphases if there is a proper balance between the attractive and repulsive contributions. However, the experimental identification of such structures has remained elusive to date. Using molecular dynamics simulations, we investigate the phase behaviour of a model system that stabilizes a cluster-crystal, a cylindrical and a lamellar phase at low temperatures. Read More

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Multiple stressors shape invertebrate assemblages and reduce their trophic niche: A case study in a regulated stream.

Sci Total Environ 2021 Jun 4;773:145061. Epub 2021 Feb 4.

Univ Lyon, Université Claude Bernard Lyon 1, CNRS, ENTPE, UMR 5023 LEHNA, F-69622 Villeurbanne, France.

Few studies have addressed how the diversity of basal resources change with stream regulation and the potential consequences on river biota. We sampled invertebrates above and below a series of dams, over two years, at both downwelling and upwelling zones. In each zone, we recorded the daily temperature and flow variations, estimated the algal development, measured the available resources, and analysed carbon and nitrogen stable isotope compositions of the invertebrate community. Read More

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Crystal structure, Hirshfeld surface analysis and density functional theory study of 6-methyl-2-[(5-methyl-isoxazol-3-yl)meth-yl]-1-benzimidazole.

Acta Crystallogr E Crystallogr Commun 2021 Apr 19;77(Pt 4):396-401. Epub 2021 Mar 19.

KU Leuven, Chemistry Department, Celestijnenlaan 200F box 2404, Leuven, (Heverlee), B-3001, Belgium.

In the title mol-ecule, CHNO, the isoxazole ring is inclined to the benzimidazole ring at a dihedral angle of 69.28 (14)°. In the crystal, N-H⋯N hydrogen bonds between neighboring benzimidazole rings form chains along the axis direction. Read More

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Crystal structure and Hirshfeld surface analysis of 3-cyano-4-hy-droxy-2-(4-methyl-phen-yl)-6-oxo--phenyl-4-(thio-phen-2-yl)cyclo-hexane-1-carbox-amide 0.04-hydrate.

Acta Crystallogr E Crystallogr Commun 2021 Apr 9;77(Pt 4):366-371. Epub 2021 Mar 9.

Department of Chemistry, Baku State University, Z. Khalilov str. 23, Az, 1148 Baku, Azerbaijan.

In the title compound, CHNOS·0.04HO, the central cyclo-hexane ring adopts a chair conformation. In the crystal, mol-ecules are linked by N-H⋯O, C-H⋯O, and C-H⋯N hydrogen bonds, forming the mol-ecular layers parallel to the plane, which inter-act by the van der Waals forces between them. Read More

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Crystal structure and Hirshfeld surface analysis of (3,3a,6a)-3-(1,3-diphenyl-1-pyrazol-4-yl)-5-(4-meth-oxy-phen-yl)-2-phenyl-3,3a,4,5,6,6a-hexa-hydro-2-pyrrolo-[3,4-][1,2]oxazole-4,6-dione.

Acta Crystallogr E Crystallogr Commun 2021 Apr 5;77(Pt 4):356-359. Epub 2021 Mar 5.

Faculty of Science, Department of Bio Chemistry, Beni Suef University, Beni Suef, Egypt.

In the title compound, CHNO, the two fused five-membered rings and their N-bound aromatic substituents form a pincer-like motif. The relative conformations about the three chiral carbon atoms are established. In the crystal, a combination of C-H⋯O and C-H⋯N hydrogen bonds and C-H⋯π(ring) inter-actions leads to the formation of layers parallel to the plane. Read More

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Crystal structure and Hirshfeld surface analysis of 4-(4-chloro-phen-yl)-5-methyl-3-{4-[(2-methyl-phen-yl)meth-oxy]phen-yl}-1,2-oxazole.

Acta Crystallogr E Crystallogr Commun 2021 Apr 5;77(Pt 4):346-350. Epub 2021 Mar 5.

Department of Physics, Faculty of Arts and Sciences, Aksaray University, 68100 Aksaray, Turkey.

In the title compound, CHClNO, the mean planes of 4-chloro-phenyl, 2-methyl-phenyl and phenyl-ene rings make dihedral angles of 62.8 (2), 65.1 (3) and 15. Read More

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The type of blood used to feed Aedes aegypti females affects their cuticular and internal free fatty acid (FFA) profiles.

PLoS One 2021 30;16(4):e0251100. Epub 2021 Apr 30.

National Institute of Public Health-National Institute of Hygiene, Warsaw, Poland.

Aedes aegypti, the primary vector of various arthropod-borne viral (arboviral) diseases such as dengue and Zika, is a popular laboratory model in vector biology. However, its maintenance in laboratory conditions is difficult, mostly because the females require blood meals to complete oogenesis, which is often provided as sheep blood. The outermost layer of the mosquito cuticle is consists of lipids which protects against numerous entomopathogens, prevents desiccation and plays an essential role in signalling processes. Read More

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Distribution of β-Lactamase Genes in Clinical Isolates from California Central Valley Hospital Deviates from the United States Nationwide Trends.

Antibiotics (Basel) 2021 Apr 27;10(5). Epub 2021 Apr 27.

Department of Molecular and Cell Biology, School of Natural Sciences, University of California Merced, Merced, CA 95343, USA.

The evolution and dissemination of antibiotic resistance genes throughout the world are clearly affected by the selection and migration of resistant bacteria. However, the relative contributions of selection and migration at a local scale have not been fully explored. We sought to identify which of these factors has the strongest effect through comparisons of antibiotic resistance gene abundance between a distinct location and its surroundings over an extended period of six years. Read More

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Measuring Disability Inclusion: Feasibility of Using Existing Multidimensional Poverty Data in South Africa.

Int J Environ Res Public Health 2021 Apr 22;18(9). Epub 2021 Apr 22.

Crawford School of Public Policy, Australian National University, Canberra 2601, Australia.

This paper presents a framework for measuring disability inclusion in order to examine the associations between disability severity and levels of inclusion, provides an example of its operationalization, and assesses the feasibility of using an existing dataset to measure disability inclusion using this framework. Inclusion here refers to the extent to which people with disabilities are accepted and recognized as individuals with authority, enjoy personal relationships, participate in recreation and social activities, have appropriate living conditions, are able to make productive contributions, and have required formal and informal support. Indicators for the operationalization were drawn from the Individual Deprivation Measure South Africa country study and were mapped on to the domains of inclusion (where relevant), and the Washington Group Short Set of questions were used to determine disability status (no, mild, or moderate/severe disability). Read More

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Mining Synergistic Microbial Interactions: A Roadmap on How to Integrate Multi-Omics Data.

Microorganisms 2021 Apr 14;9(4). Epub 2021 Apr 14.

Department of Environmental Microbiology, Helmholtz Centre for Environmental Research-UFZ, 04318 Leipzig, Germany.

Mining interspecies interactions remain a challenge due to the complex nature of microbial communities and the need for computational power to handle big data. Our meta-analysis indicates that genetic potential alone does not resolve all issues involving mining of microbial interactions. Nevertheless, it can be used as the starting point to infer synergistic interspecies interactions and to limit the search space (i. Read More

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Multiple carbon incorporation strategies support microbial survival in cold subseafloor crustal fluids.

Sci Adv 2021 Apr 28;7(18). Epub 2021 Apr 28.

Department of Marine Chemistry and Geochemistry, Woods Hole Oceanographic Institution, Woods Hole, MA 02543, USA.

Biogeochemical processes occurring in fluids that permeate oceanic crust make measurable contributions to the marine carbon cycle, but quantitative assessments of microbial impacts on this vast, subsurface carbon pool are lacking. We provide bulk and single-cell estimates of microbial biomass production from carbon and nitrogen substrates in cool, oxic basement fluids from the western flank of the Mid-Atlantic Ridge. The wide range in carbon and nitrogen incorporation rates indicates a microbial community well poised for dynamic conditions, potentially anabolizing carbon and nitrogen at rates ranging from those observed in subsurface sediments to those found in on-axis hydrothermal vent environments. Read More

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Domestic dog demographics and estimates of canine vaccination coverage in a rural area of Zambia for the elimination of rabies.

PLoS Negl Trop Dis 2021 Apr 28;15(4):e0009222. Epub 2021 Apr 28.

Unit of Risk Analysis and Management, Hokkaido University Research Center for Zoonosis Control, Sapporo, Hokkaido, Japan.

Background: An estimated 75% or more of the human rabies cases in Africa occur in rural settings, which underscores the importance of rabies control in these areas. Understanding dog demographics can help design strategies for rabies control and plan and conduct canine mass vaccination campaigns effectively in African countries.

Methodology/principal Findings: A cross-sectional survey was conducted to investigate domestic dog demographics in Kalambabakali, in the rural Mazabuka District of Zambia. Read More

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Cardiovascular Neuroendocrinology: Emerging Role for Neurohypophyseal Hormones in Pathophysiology.

Endocrinology 2021 Apr 23. Epub 2021 Apr 23.

Department of Physiology and Anatomy, Graduate School of Biomedical Sciences.

Arginine vasopressin (AVP) and oxytocin (OXY) are released by magnocellular neurosecretory cells that project to the posterior pituitary. While AVP and OXY currently receive more attention for their contributions to affiliative behavior, this mini-review discusses their roles in cardiovascular function broadly defined to include indirect effects that influence cardiovascular function. The traditional view is that neither AVP nor OXY contributes to basal cardiovascular function, although some recent studies suggest that this position might be re-evaluated. Read More

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EXPRESS: Two-Trace Two-Dimensional Correlation Spectroscopy (2T2D-COS) Study of the Crystallization Behavior of Bioplastics.

Authors:
Isao Noda

Appl Spectrosc 2021 Apr 20:37028211014165. Epub 2021 Apr 20.

University of Delaware, Materials Science and Engineering, Professor, 201 DuPont Hall, Newark, Delaware, United States.

A pair of ATR IR spectra obtained during the crystallization of bioplastic copolymer poly[(R)-3-hydroxybutyrate-co-(R)-3-hydroxyhexanoate] or PHBHx from the melt by spontaneous cooling were examined using the two-trace two-dimensional correlation spectroscopy (2T2D-COS) analysis. Unlike conventional difference spectra, 2T2D spectra showed unexpected details for the patterns of spectral intensity changes, clearly revealing the existence of two distinct populations of crystalline contributions, attributed to the well-ordered primary crystals and the less ordered secondary crystals, in addition to the amorphous component. The 2T2D spectrum sorts out highly overlapped bands associated with different constituents of the system, based on the fundamental properties and constraint imposed on a pair of spectra. Read More

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Characterization of the Expression of Vacuolar Protein Sorting 11 (Vps11) in Mammalian Oligodendrocytes.

ASN Neuro 2021 Jan-Dec;13:17590914211009851

Department of Ophthalmology, Visual and Anatomical Sciences, 12267Wayne State University School of Medicine, Detroit, Michigan, United States.

A founder mutation in human () was recently linked to a genetic leukoencephalopathy in Ashkenazi Jews that presents with the classical features of white matter disorders of the central nervous system (CNS). The neurological deficits include hypomyelination, hypotonia, gradual loss of vision, and seizures. However, the cells expressing the mutation were not identified. Read More

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Differentiations in Visibility-Male Advantages and Female Disadvantages in Gender-Segregated Programmes.

Front Sociol 2020 7;5:563204. Epub 2020 Oct 7.

School of Education, Humanities and Social Sciences, Halmstad University, Halmstad, Sweden.

This article stresses the importance of understanding that women and men in gender-segregated programmes experience their gender minority positions very differently. It stems from an interest in the kind of interventions that academia should address in order to reduce gender segregation and provide women and men with the same educational opportunities and personal development. In relation to the obvious and continuing gender differences along a horizontal dimension, previous research seems to have had a limited impact in breaking gender stereotypes and promoting women and men to more atypical fields. Read More

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October 2020

Gut microbiota-microRNA interactions in ankylosing spondylitis.

Autoimmun Rev 2021 Jun 20;20(6):102827. Epub 2021 Apr 20.

Spondylitis Program, Division of Rheumatology, Schroeder Arthritis Institute, University Health Network, Toronto, Ontario, Canada; Krembil Research Institute, University Health Network, Toronto, Ontario, Canada; Departments of Medicine and Immunology, University of Toronto, Toronto, Ontario, Canada. Electronic address:

Ankylosing spondylitis (AS) is a chronic autoimmune inflammatory disability that is part of the rheumatic disease group of spondyloarthropathies. AS commonly influences the joints of the axial skeleton. The contributions to AS pathogenesis of genetic susceptibility (particularly HLA-B27 and ERAP-1) and epigenetic modifications, like non-coding RNAs, as well as environmental factors, have been investigated over the last few years. Read More

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Ionomic Responses of Local Plant Species to Natural Edaphic Mineral Variations.

Front Plant Sci 2021 29;12:614613. Epub 2021 Mar 29.

Research Faculty of Agriculture, Hokkaido University, Sapporo, Japan.

Leaf ionome indicates plant phylogenetic evolution and responses to environmental stress, which is a critical influential factor to the structure of species populations in local edaphic sites. However, little is known about leaf ionomic responses of local plant species to natural edaphic mineral variations. In the present study, all plant species and soil samples from a total of 80 soil sites in Shiozuka Highland were collected for multi-elemental analysis. Read More

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The powdery mildew disease of rubber (Oidium heveae) is jointly controlled by the winter temperature and host phenology.

Int J Biometeorol 2021 Apr 14. Epub 2021 Apr 14.

Key Laboratory for Economic Plants and Biotechnology, Kunming Institute of Botany, Chinese Academy of Sciences, 132 Lanhei Road, Kunming, 650201, Yunnan, China.

Rubber powdery mildew disease (Oidium heveae) is a serious threat to natural rubber production (Hevea brasiliensis) in some rubber developing regions of the world. Both phenological- and meteorological-related factors have been reported influencing the powdery mildew disease. However, few studies have investigated the effects of both phenological- and meteorological-related factors on the disease. Read More

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Social Work Research on Immigrants: A Content Analysis of Leading Journals from 2007 to 2016.

Soc Work 2021 May;66(2):111-118

International migration has emerged as one of the most controversial phenomena of the 21st century. The complexity and implications of global migrations require that social work practitioners and researchers have access to data-informed research and critical analyses. However, the content of recent social work research on international migration has not been adequately examined to assess whether and to what extent this substantive area is being addressed. Read More

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Analysis of Twitter Activity and Engagement From Annual Meetings of the Society for Vascular Surgery and the Society of Interventional Radiology.

Ann Vasc Surg 2021 Apr 5. Epub 2021 Apr 5.

Virginia Commonwealth University School of Medicine, Richmond, VA; Virginia Commonwealth University Health System, Richmond, VA; Central Virginia VA Health Care System, Richmond, VA.

Background: Medical societies such as the Society for Vascular Surgery (SVS) and the Society of Interventional Radiology (SIR) have been encouraging the use of social media at annual meetings by establishing unique meeting hashtags (eg. #VAM19, #SIR19ATX). These two specialties have similar number of active physicians and share procedural interests. Read More

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: an emerging pathogen in female reproductive disease and adverse perinatal outcomes.

Crit Rev Microbiol 2021 Apr 6:1-26. Epub 2021 Apr 6.

Perinatology Research Branch, Division of Obstetrics and Maternal-Fetal Medicine, Division of Intramural Research, Eunice Kennedy Shriver National Institute of Child Health and Human Development, National Institutes of Health, U. S. Department of Health and Human Services, Detroit, MI, USA.

is an emerging pathogen implicated in adverse reproductive and perinatal outcomes. Although scarce, recent data suggest that vaginally residing becomes pathogenic following its ascension into the upper urogenital tract, amniotic fluid, placenta, and foetal membranes. The role of in women's health and disease is generally underappreciated because the cultivation of these bacteria is limited by their complex nutritional requirements, slow growth patterns, and anaerobic nature. Read More

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Cross-Talk between Overlap Interactions in Biomolecules: A Case Study of the -Turn Motif.

Authors:
Jayashree Nagesh

Molecules 2021 Mar 11;26(6). Epub 2021 Mar 11.

Solid State and Structural Chemistry Unit, Indian Institute of Science Bangalore, Bengaluru 560012, Karnataka, India.

Noncovalent interactions play a pivotal role in regulating protein conformation, stability and dynamics. Among the quantum mechanical (QM) overlap-based noncovalent interactions, n→π* is the best understood with studies ranging from small molecules to β-turns of model proteins such as GB1. However, these investigations do not explore the interplay between multiple overlap interactions in contributing to local structure and stability. Read More

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Complete sequencing of expanded SAMD12 repeats by long-read sequencing and Cas9-mediated enrichment.

Brain 2021 May;144(4):1103-1117

Department of Human Genetics, Yokohama City University Graduate School of Medicine, Yokohama 236-0004, Japan.

A pentanucleotide TTTCA repeat insertion into a polymorphic TTTTA repeat element in SAMD12 causes benign adult familial myoclonic epilepsy. Although the precise determination of the entire SAMD12 repeat sequence is important for molecular diagnosis and research, obtaining this sequence remains challenging when using conventional genomic/genetic methods, and even short-read and long-read next-generation sequencing technologies have been insufficient. Incomplete information regarding expanded repeat sequences may hamper our understanding of the pathogenic roles played by varying numbers of repeat units, genotype-phenotype correlations, and mutational mechanisms. Read More

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Identification of immucillin analogue natural compounds to inhibit MTAN through high throughput virtual screening and molecular dynamics simulation.

In Silico Pharmacol 2021 11;9(1):22. Epub 2021 Mar 11.

Department of Biotechnology, Manonmaniam Sundaranar University, Tirunelveli, Tamil Nadu 627 012 India.

Abstract: One in every two humans is having () in stomach causing gastric ulcer. Emergence of several drugs in eliminating has paved way for emergence of multidrug resistance in them. This resistance is thriving and thereby necessitating the need of a potent drug. Read More

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δN-stable isotope analysis of NH : An overview on analytical measurements, source sampling and its source apportionment.

Front Environ Sci Eng 2021 15;15(6):126. Epub 2021 Mar 15.

CAS Key Laboratory of Forest Ecology and Management, Institute of Applied Ecology, Chinese Academy of Sciences, Shenyang, 110016 China.

Agricultural sources and non-agricultural emissions contribute to gaseous ammonia (NH) that plays a vital role in severe haze formation. Qualitative and quantitative contributions of these sources to ambient PM (particulate matter with an aerodynamic equivalent diameter below 2.5 µm) concentrations remains uncertain. Read More

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gene polymorphisms and neuroblastoma susceptibility in Chinese children: an eight-center case-control study.

J Cancer 2021 5;12(8):2465-2471. Epub 2021 Mar 5.

Department of Pediatric Surgery, Shengjing Hospital of China Medical University, Shenyang 110004, Liaoning, China.

Neuroblastoma is one of the most common life-threatening extracranial tumors that mainly occurs in children, and its genetic etiology remains largely obscure. RNA m6A modification has been thought to play a key role in cancer progression. is the critical downstream gene by which RNA m6A modification exerts its functions. Read More

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