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risk factors for long COVID in children and adolescents:a systematic review and meta-analysis

World Journal of Pediatrics 2024年第2期20卷 133-142页

作者： Daniel G.rayner Elaine Wang Cloris Su om D.Patel Stephanie Aleluya Alessandra Giglia Evelyn Zhu Maha Siddique Department of Health research Methods Evidenceand ImpactFaculty of Health SciencesMcMaster University1280 Main St WHamiltonONL8S 4K1Canada Faculty of Health Sciences McMaster University1280 Main St WHamiltonON L8S 4K1Canada Faculty of Science McMaster University1280 Main St WHamiltonONL8S 4K1Canada

Background The long-term sequelae of COVID-19 in children and adolescents remain poorly understood and *** systematic review and meta-analysis sought to summarize the risk factors for long COVID in the pediatric *** We searched six databases from January 2020 to May 2023 for observational studies reporting on risk factors for long COVID or persistent symptoms those were present 12 or more weeks post-infection using multivariable regression *** registries,reference lists of included studies,and preprint servers were hand-searched for relevant ***-effects meta-analyses were conducted to pool odds ratios for each risk *** study risk of bias was rated using QUIPS,and the GrADE framework was used to assess the certainty of evidence for each unique *** Sixteen observational studies(n=46,262)were included,and 19 risk factors were amenable to *** moderate certainty in the evidence,age(per 2-year increase),allergic rhinitis,obesity,previous respiratory diseases,hospitalization,severe acute COVID-19,and symptomatic acute COVID-19 are probably associated with an increased risk of long *** sex,asthma,com.rbidity,and heart diseases may be associated with an increased risk of long COVID,and Asian and Black races may be associated with a decreased risk of long *** did not observe any credible subgroup effects for any risk *** The current body of literature presents several compelling risk factors for the development of long COVID in the pediatric *** research is necessary to elucidate the pathophysiology of long COVID.

关键词： COVID-19 Long COVID Post-acute COVID-19 syndrome Pediatrics risk factors

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Fault Detection for Microgrid Feeders Using Features Based on Superimposed Positive-sequence Power

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Journal of Modern Power Systems and Clean Energy 2023年第6期11卷 1948-1958页

作者： Salauddin Ansari om Hari Gupta om P.Malik Department of Electrical Engineering National Institute of TechnologyJamshedpur 831014India IEEE Department of Electrical and Software Engineering University of Calgary2500 University Drive NWCalgary Alberta T2N 1N4Canada

With the integration of distributed generation(DG) into a microgrid, fault detection has become a major task to accomplish. A scheme for microgrid feeder protection based on a newly proposed feature, ΔrP, defined as the ratio of the sum of positive-sequence real power(PSrP) at the two ends of the feeder to the larger of the PSrPs among the two ends, is proposed. If ΔrP is larger than a threshold, an internal fault is detected;otherwise, the fault is external or there is no fault. The proposed scheme is tested in various scenarios, including fault type, fault resistance, fault location, fault inception angle, varying DG penetration levels, and simultaneous, evolving, and composite faults. In addition to this, the proposed scheme offers a robust performance when subjected to noise, synchronization error, changes in sampling frequency, and changes in the topology of a microgrid. The dominancy of the proposed scheme is proven by a com.rehensive comparative study with various available recent schemes. Test results on the IEEE 13-bus network indicate the viability of the proposed protection scheme for a microgrid. Finally, the proposed scheme has been validated on a real-time simulator.

关键词： Fault detection distributed generation microgrid protection superimposed power

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Solitary kinetic Alfvén waves in a dense electron–positron–ion plasma with degenerate electrons and positrons

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Plasma Science and Technology 2017年第12期19卷 42-49页

作者： Monzurul K AHMED om P SAH Depatment of Physics Birjhora MahavidyalayaBongaigaon-783380AssamIndia

Through the use of a reductive perturbation technique, solitary kinetic Alfvén waves（KAWs） are investigated in a low but finite b（particle-to-magnetic pressure ratio） dense electron–positron–ion plasma where electrons and positrons are degenerate. The degenerate plasma model considered here permits the existence of sub-Alfvénic com.ressive solitary KAWs. The influence of r（equilibrium positron-to-ion density ratio）, sF（electron-to-positron Fermi temperature ratio）, b and obliqueness parameter lzon various characteristics of solitary KAWs are examined through numerical plots. We have shown that there exists a critical value of lzat which a soliton width attains its maximum value which decreases with an increase in r and *** is also found that solitons with a higher energy propagate more obliquely in the direction of an ambient magnetic field. The results of the present investigation may be useful for understanding low frequency nonlinear electromagnetic wave propagation in magnetized electron–positron–ion plasmas in dense stars. Specifically, the relevance of our investigation to a pulsar magnetosphere is emphasized.

关键词： kinetic Alfvén waves solitons electron–positron–ion plasma degenerate plasma Thomas–Fermi approximation

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Solitary kinetic Alfven waves in dense plasmas with relativistic degenerate electrons and positrons

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Plasma Science and Technology 2019年第4期21卷 85-93页

作者： Monzurul K AHMED om P SAH Department of Physics Biijhora MahavidyalayaBongaigaon-783380AssamIndia

Propagation of solitary kinetic Alfven waves(KAWs)is investigated in small but finite/3(particle-to-magnetic pressure ratio)collisionless dense plasma whose constituents are non degenerate wann ions,and relativistic degenerate electrons and *** the use of reductive perturbation technique,Kortweg-de Vries equation is derived to obtain small amplitude localized wave solution of *** effects of plasma 0,positron concentration,electron relativistic degeneracy parameter,ion thermal temperature and obliqueness parameter on solitary KAWs are *** results of this theoretical investigation are aimed at elucidating characteristics of kinetic Alfven solitary waves in relativistic degenerate e-p-i plasmas found in dense astrophysical objects specifically neutron stars and white dwarfs.

关键词： solitary kinetic Alfven waves dense plasmas electron-positron-ion plasma,relativistic degenerate plasma reductive perturbation technique

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On Almost Armendariz ring

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Algebra Colloquium 2020年第2期27卷 199-212页

作者： om Prakash Sushma Singh K.P.Shum Department of Mathematics Indian Institute of Technology Patna PatnaBihar 801106India Department of Mathematics John Fulton Center The Chinese University of Hong KongShatinN.T.Hong KongChina

In this paper,we introduce the notion of an almost Armendariz ring,which is a generalization of an Armendariz ring,and discuss some of its *** has been found that every almost Armendariz ring is weak Armendariz but the converse is not *** prove that a ring r is almost Armendariz if and only if r[x]is almost *** is also shown th at if r/I is an almost Armendariz ring and I is a semicommutative ideal,then H is an almost Armendariz ***,the class of minimal non-commutative almost Armendariz rings is completely determined,up to isom.rphism(minimal means having smallest cardinality).

关键词： Armendariz ring almost Armendariz ring weak Armendariz ring lower nil radical reduced ring semicommutative ring

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Effect of forest fragment size on tree diversity and population structure of humid subtropical forest of Meghalaya, India

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生物多样性 2010年第2期18卷 208-214页

作者： om Prakash Tripathi Khongjee rangdajied reynald Department of Botany North Eastern Hill University Shillong-793 022 India Department of Forestry NERIST Nirjuli-791109 India

The present study was conducted in subtropical humid forests of Meghalaya to study the distributional pattern of species, floristic composition, community structure and tree population *** fragments of varying sizes(0.5 ha, 1 ha, 2 ha and 5 ha) were used in the *** of the forest fragments are distributed within the same altitudinal range, and had similar rainfall and temperature *** forest fragments were sampled using random quadrats to analyze the impact of fragment size on tree diversity and population *** were used to compare the dispersion pattern of plant species, species diversity among fragments, and the heterogeneity and homogeneity of the fragments.A total of 45 tree species were recorded from all the fragments and simple correlation showed that the species richness was positively related to fragment size(n = 4, Pr measures such as stand density, basal cover, diversity and dominance indices were unrelated to fragment *** canopy was composed mainly of Castonopsis indica, ***, Schima khasiana and Engelhardtia spicata in all of the fragments.A majority of woody tree species were contagiously distributed which made the forest community highly patchy in *** values of Sorensen's similarity index and high values of Whittaker's β-diversity index between the fragments suggest marked difference in the species composition among the *** maximum stand density, basal area, Shannon diversity index and Simpson dominance index was recorded in a 5-ha *** in lower girth classes(15-55 cm circumference at breast height, CBH) accounted for 52-86% of stand density in all fragments except in 0.5-ha fragments where middle girth class(55-95 cm CBH) accounted for 47% of the total stand *** overall density of seedlings, saplings and adult trees formed a pyramidal structure, indicating that the period between the sapling and adult stage was a critical stage in tree life cycles, as the

关键词：生物多样性相异性指数生态学森林

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Geochemical Analysis of Albian-Maastrichtian Formations in the Offshore Basin of the Abidjan Margin: rock-Eval Pyrolysis Study

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Open Journal of Geology 2024年第8期14卷 805-822页

作者： n’Guessan Donald Ahoure Blandine Akissi Egoran Guy richard n’Dri Kouadio Zokagon Sylvain Sehi Emmanuelle Laure Oura Zéli Bruno Digbehi UFr of Sciences and Technologies Alassane Ouattara Bouak Laboratory of Plant Biology and Earth Sciences Bouak Cte dIvoire UFr Marine Sciences San Pedro University San Pedro Cte dIvoire PETrOCI Geochimistry Department at the Center for Analysis and Research Abidjan Cte dIvoire UFr/STrM Felix Houphout Boigny University of Abidjan Abidjan Cte dIvoire

The Albian-Maastrichtian interval of the Ivorian sedimentary basin has been the subject of numerous sedimentological, biostratigraphic, and geophysical studies. However, its geochemical characteristics remain relatively unexplored. This study aims to determine the oil potential and the nature of the organic matter it contains. It focuses on the geochemical analysis (physicochemical method) of two oil wells located in the offshore sedimentary basin of Côte d’Ivoire, specifically in the Abidjan margin. A total of 154 cuttings samples from wells TMH-1X and TMH-2X were analyzed to determine their oil potential and the nature of the organic matter (om) they contain. The analyses were performed using rock-Eval pyrolysis, a method that characterizes the amount of hydrocarbons generated by the organic matter present in the rocks. The key parameters measured include Total Organic Carbon (TOC), Hydrogen Index (HI), oil potential (S2), and maximum pyrolysis temperature (Tmax). These parameters are used to assess the amount of organic matter, its thermal maturity, and its potential to generate hydrocarbons in the studied wells. The results show significant variations between different stratigraphic levels. In well TMH-1X, the Cenomanian and Campanian intervals stand out with very good quantities of organic matter (om) with good oil potential, although often immature. In contrast, other stages such as the Albian and Turonian contain organic matter in moderate to low quantities, often immature and of continental type, which limits their capacity to generate hydrocarbons. In well TMH-2X, a similar trend is observed. Despite an abundance of organic matter, the oil potential remains low in most of the studied stages. The organic matter is primarily of type III (continental origin) and thermally immature, indicating a low potential for hydrocarbon generation. The study reveals that, although some intervals exhibit high-quality organic matter, the majority of the samples show insuffic

关键词： Geochemistry rock-Eval Pyrolysis Upper Senonian Petroleum Potential Côte d’Ivoire

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Benzimidazole derivatives: search for GI-friendly anti-inflammatory analgesic agents

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Acta Pharmaceutica Sinica B 2015年第4期5卷 337-342页

作者： Monika Gaba Punam Gaba Deepika Uppal neelima Dhingra Malkeet Singh Bahia om Silakari Chander Mohan Department of Pharmaceutical Sciences ASBASJSM College of Pharmacy research Scholar Punjab Technical University University Institute of Pharmaceutical Sciences Panjab University Department of Pharmaceutical Sciences and Drug research Punjabi University rayat-Bahra Institute of Pharmacy Hoshiarpur Affiliated to Punjab Technical University

non-steroidal anti-inflammatory drugs(nSAIDs) have been successfully used for the alleviation of pain and inflammation in the past and continue to be used daily by millions of patients worldwide. However, gastrointestinal(GI) toxicity associated with nSAIDs is an important medical and socioeconomic problem. Local generation of various reactive oxygen species plays a significant role in the formation of gastric ulceration associated with nSAIDs therapy. Co-medication of antioxidants along with nSAIDs has been found to be beneficial in the prevention of GI injury. This paper describes the synthesis and biological evaluation of n-1-(phenylsulfonyl)-2-methylamino-substituted-1H-benzimidazole derivatives as anti-inflammatory analgesic agents with lower GI toxicity. Studies in vitro and in vivo demonstrated that the antioxidant activity of the test compounds decreased GI toxicity.

关键词： Benzimidazole Analgesic Gastrointestinal toxicity Antioxidant activity

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Ecdysis triggering hormone peptide in the African malaria mosquito Anopheles gambiae:The peptide structure for receptor activation

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Insect Science 2022年第5期29卷 1309-1317页

作者： Hawa Dembele Moritz Mating rupinder Singh Soheila Fatehi Alvaro I.Herrera Yoonseong Park om Prakash Department of Biochemistry and Molecular Biophysics Kansas State UniversityManhattanKansas66506 Department of Entomology Kansas State UniversityManhattanKansas66506 Department of Chemistry&Biochemistry Auburn UniversityAuburnAlabamaUSA

Infections by mosquito-borne diseases represent one of the leading causes of death in third world *** rapid progression of resistance to conventional insecticide causes a significant threat to the highly efficient preventive methods currently in *** neuropeptidergic system offers potential targets to control the insect *** essential roles of the neuropeptide ecdysis triggering hormone(ETH)in insect development and reproduction led us to attempt understanding of the fundamentals of the biochemical interaction between ETH and its receptor in the African malaria mosquito Anopheles *** of two ETH peptides of the African malaria mosquito(AgETH1),a small peptide hormone with 17 amino acid residues(SESPGFFIKLSKSVPrI-nH2),was studied to elucidate its molecular structure.n-termini deletions and mutations of conserved amino acids in the ligand revealed the critical residues for the receptor *** solution structure of AgETH1 using 2D 1H-1H nuclear magnetic resonance(nMr)spectroscopy and nuclear overhauser effect(nOE)derived constraints revealed a short alpha helix between residues 3S and *** nMr solution structure of AgETH1 will be of significant assistance for designing a new class of insecticidal compounds that acts on the AgETH receptor aiming for in silico docking studies.

关键词： Anopheles gambiae ecdysis triggering hormone G protein-coupled receptor insect malaria neuropeptide nMr spectroscopy

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Studies on metals and pesticide content in some Ayurvedic formulations containing Bacopa monnieri L.

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Journal of Integrative Medicine 2016年第1期14卷 44-50页

作者： Amrita Mishra Arun K.Mishra om Prakash Tiwari Shivesh Jha Central Facility of Instrumentation School of Pharmaceutical SciencesIFTM University Department of Pharmaceutical Sciences Birla Institute of Technology

OBJECTIVE： Ayurvedic formulations are preferred over other formulations as well as commercialized on broad level to treat various ailments. The World Health Organization has established certain guidelines for quality control of heavy metals and pesticide residues. Bacopa monnieri, a popular herb with immunomodulator and memory-enhancing properties is the chief constituent of several Ayurvedic formulations, which include Brahmi Vati （BV）, Brahmi Ghrita （BG） and Saraswat Churna （SC）, etc. In view of the World Health Organization guidelines, two products of each formulation from six different manufacturers were purchased from Ayurvedic Pharmacy, Bulanala-Varanasi, India for testing heavy metal and pesticide residue. METHODS： In the present study, all the formulations--BY, BG and SC--were selected for estimation of four heavy metals namely lead （Pb）, cadmium （Cd）, chromium （Cr） and nickel （ni） by a plasma emission spectrophotometer. Organochlorine pesticidal residues were estimated for dichlorodiphenyl trichloroethane, isom.rs of hexachlorocyclohexane （HCH） and a-endosulfan, etc. in total 12 samples of test formulations containing Bacopa monnieri L. using gas chromatography technique. rESULTS： Out of 12 samples, Pb, Cd, Cr and ni were present in all samples but below the permissible limit. Although atrazine, aldrin, dialdrin were in below detection limit, but other pesticides were detected in some samples as oxamyl, hexachlorocyclohexanes （α-HCH, β-HCH and y-HCH）, dichlorodiphenyl trichloroethane and dichlorodiphenyl dichloroethylene. COnCLUSIOn： The presence of heavy metals in evaluation of heavy metals and pesticide residue the formulations was low to cause toxicity. However n every batch is necessary.

关键词： Ayurvedic formulations heavy metals pesticide residues drug contamination

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