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Recent progress in emerging BiPO_(4)-based photocatalysts:Synthesis,properties,modification strategies,and photocatalytic applications

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journal of Materials Science & Technology 2022年第13期108卷 208-225页

作者： Rohit kumar Pankaj Raizada Aftab Aslam Parwaz Khan Van-Huy Nguyen Quyet Van Le Suresh Ghotekar Rangabhashiyam Selvasembian Vimal Gandhi Archana Singh Pardeep Singh School of Advanced Chemical Sciences Shoolini UniversitySolan(Himachal Pradesh)-173212India Center of Excellence for Advanced Materials Research King Abdulaziz UniversityP.O.Box 80203Jeddah 21589Saudi Arabia Chemistry Department Faculty of ScienceKing Abdulaziz UniversityP.O.Box 80203Jeddah 21589Saudi Arabia Faculty of Biotechnology Binh Duong UniversityThu Dau MotVietnam. Department of Materials Science and Engineering Korea University145Anam-ro Seongbuk-guSeoul 02841South Korea Department of Chemistry Smt.Devkiba Mohansinhji Chauhan College of Commerce and ScienceSilvassa 396230University of MumbaiDadra and Nagar Haveli(UT)India Department of Chemistry S.N.ArtsD.J.M.Commerce and B.N.S.Science CollegeSangamner 422605Savitribai Phule Pune UniversityMaharashtraIndia Department of Biotechnology School of Chemical and BiotechnologySASTRA Deemed UniversityThanjavur-613401TamilnaduIndia Department of Chemical Engineering Faculty of TechnologyDharmsinh Desai UniversityNadiad-387001GujaratIndia Advanced Materials and Processes Research Institute Hoshangabad RoadBhopal 462026India

In this perspective,we have highlighted the current literature and explained the synthesis,structure,morphology,modification strategies,and photocatalytic applications of emerging BiPO_(4)-based *** BiPO_(4)is a large bandgap photocatalyst,it uses UV light for the excitation of electrons,and also,the recombination of charge carriers is an issue in BiPO_(4).Various novel modification strategies of BiPO_(4)photocatalysts *** modifications,heterojunction formation,phase-junctions,surface plasmon resonance,Schottky junction have been successfully proposed and *** modifications enhance the light absorption and inhibit the recombination of charge carriers BiPO_(4)***,future aspects for further research on BiPO_(4)-based photocatalysts are also *** expects that BiPO_(4)-based photocatalysts represent a promising strategy for developing practical photocatalysts for energy and environmental remediation applications.

关键词： Photocatalysis Modification strategies Environmental remediation BiPO_(4)photocatalyst

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Inhibiting Protein Aggregation by Small Molecule-Based Colloidal Nanoparticles

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Accounts of Materials Research 2022年第1期3卷 54-66页

作者： Koushik Debnath Ankan kumar Sarkar Nihar R.jana Nikhil R.jana Department of Pharmacology and Regenerative Medicine College of MedicineUniversity of Illinois at ChicagoChicagoIllinois 60612United States Department of Biomedical Engineering College of MedicineUniversity of Illinois at ChicagoChicagoIllinois 60607United States School of Materials Sciences Indian Association for the Cultivation of ScienceKolkata 700032India

CONSPECTUS:Protein aggregation is associated with different human diseases such as Alzheimer’s,Huntington’s,Parkinson’s,diabetes type II,and *** no effective treatment exists for many of these diseases,particularly for neurological *** research focuses on understanding the origin of protein aggregation,nucleation−growth mechanism of protein aggregation,origin of cytotoxicity of protein aggregates,cellular response of toxic protein aggregates,progress of diseases at intra/extracellular space,and drug developments for respective *** issues are the identification of molecular drugs that can inhibit protein aggregation at early stage,lowering of toxicity due to protein aggregates,delivery of drugs to remote organ and intracellular space,clearing matured protein aggregates from cell/extracellular space/brain,and design of effective therapeutic *** and materials scientists have identified a wide variety of antiamyloidogenic small molecules,macromolecules,and *** is shown that antiamyloidogenic molecules prevent protein oligomerization via binding to protein,masking metal ions(via chelating with metal ions)that are responsible for protein aggregation via generating reactive oxygen species(ROS),and lowering protein−protein interaction via macromolecular crowding ***,nanoscale materials with curved surface and multiple chemical functional groups act as adsorption/binding sites of proteins,modulate nucleation−growth kinetics of protein aggregation,and delay/inhibit protein aggregation in many ***,performance of all these antiamyloidogenic materials needs significant improvement,and proper therapeutic strategies are required for effective drug *** this Account,we describe that the performance of antiamyloidogenic molecules can be greatly improved via appropriate design into colloidal and nanoparticle *** first discuss different human diseases that are linked with protein agg

关键词： integrating Huntington curved

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Threefold Increase in the Number of Drug Resistant TB Cases after Introduction of Universal Drug Susceptibility Testing: Experiences from Two South India Districts

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journal of Tuberculosis Research 2020年第2期8卷 42-52页

作者： Sanath kumar Gurram Krishnamurthy sharath Burugina Nagaraja Tanu Anand Karuna D. Sagili Cheluve Gowda Shailaja Basavaraj Poojar Srinath Satyanarayana Department of Health and Family Tumkur District Karnataka India Department of Community Medicine ESIC Medical College and PGIMSR Bengaluru India Department of Community Medicine North Delhi Municipal Corporation Medical College Hindu Rao Hospital Delhi India Department of TB and Communicable Diseases the Union South East Asia Office New Delhi India Department of Community Medicine Sri Siddhartha Medical College Tumkur Karnataka India Department of Health and Family Belgaum District Karnataka India Department of Pharmacology Kasturba Medical College Mangalore Manipal Academy of Higher Education Manipal India The Union South East Asia Office New Delhi India

Background: In India, tuberculosis (TB) is a major public health problem, and the advent of drug resistance TB (DR-TB) has worsened the situation. The Revised National TB Control Programme (RNTCP) has introduced universal drug susceptibility testing (UDST) for all diagnosed TB cases in 2018. We conducted this study to know the advantage of implementing UDST when compared to selective testing existent in 2017 on key diagnostic cascade parameters and to identify the challenges in the implementation of UDST. Methods: The study was conducted in two districts of Karnataka, India during january 2017-December 2018. The quantitative part consisted of before-and-after design and the qualitative part consisted of descriptive design. Results: In 2017 (during selective testing/“before” period) out of the 2440 TB patients, 80 (3%) were diagnosed with Isoniazid and Rifampicin resistance patients;in contrast in 2018 (during UDST/“after” period) of the 5129 TB patients 258 (5%) were diagnosed with Isoniazid and Rifampicin resistance. However, the proportion of eligible patients tested for rifampicin resistance during the “after” period was 60% when compared to 100% during the “before” period and median turnaround time for testing was also longer during the “after” period when compared to the “before” period (32.5 days vs 27.5 days). Major reasons for these two gaps were found to be difficulties in collecting sputum specimens and transportation. Conclusion: The rollout of UDST has led to a three-fold increase in a number of DR-TB cases detected in the region. There is a need for the programme to increase the proportion tested for DST by increasing the laboratory capacity and address the challenges in sputum collection and transportation.

关键词： Operational Research Criteria C Line Probe Assay Universal Drug Susceptibility Testing Culture and Drug Susceptibility Testing

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Colloidal synthesis and characterization of Cu_2ZnSnS_4 nanoplates

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journal of Semiconductors 2017年第3期38卷 110-115页

作者： S.Ananthakumar j.Ram kumar S.Moorthy Babu Crystal Growth Centre Anna University Department of Physics Faculty of Physical and Mathematical SciencesUniversity of Concepcion

Synthesis of copper zinc tin sulphide（Cu_2ZnSnS_4/ with nanoplate morphology was achieved through colloidal method using oleic acid as capping agent and solvent with 1-octadecene（1-ODE） at 240°C.X-ray diffraction（XRD） analysis shows that the synthesized nanoplates possessed pure kesterite *** analysis clearly shows the formation of nanoplates having the size of about 50–100 *** spin resonance（ESR） spectrum analysis of the prepared nanoplates shows that the valence state of copper（II） which indicates the strong coupling with other metal *** gravimetric/differential thermal analysis（TG/DTA） analysis shows the weight loss of sample at 450°C predicting the loss of capping ligands on the surface of the *** possible mechanism for the conversion of nanoplate-like structures during synthesis was *** results are discussed in detail.

关键词： colloidal method solar cells kesterites nanoplates oleic acid

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Carbon dioxide adsorption and cycloaddition reaction of epoxides using chitosan–graphene oxide nanocomposite as a catalyst

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journal of Environmental Sciences 2018年第7期30卷 77-84页

作者： Santosh kumar Mohmmad Y.Wani joonseok Koh joao M.Gil Abilio j.F.N.Sobral Chemistry Center Department of ChemistryUniversity of CoimbraCoimbra 3004-535Portugal Department of Organic and Nano System Engineering Konkuk UniversitySeoul 143-701Republic of Korea CFisUC Department of PhysicsUniversity of CoimbraCoimbra 3004-516Portugal

One of today＇s major challenges is to provide green materials for a cleaner environment. We have conducted studies on carbon dioxide（CO2） adsorption and conversion to valuable products by an ecofriendly approach based in chitosan/graphene oxide（CSGO） nanocomposite film. Rheological behavior indicates that the CSGO has a better solvation property than the pure chitosan. An adsorption capacity of 1.0152 mmol CO2/g of CSGO nanocomposite at4.6 bar was observed. The catalytic behavior of the CSGO nanocomposite in the presence of tetra-n-butylammonium iodide（n-Bu4 NI） as co-catalyst was evaluated for the cycloaddition of CO2 to epoxides, to give cyclic carbonates, in the absence of any solvent. These results strongly suggest that the CSGO nanocomposite may open new vistas towards the development of ecofriendly material for catalytic conversion and adsorption of CO2 on industrial scale.

关键词： Chitosan Graphene oxide Adsorption Conversion Carbon dioxide

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Characterization of partial melting events in garnet-cordierite gneiss from the Kerala Khondalite Belt,India

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Geoscience Frontiers 2020年第2期11卷 597-611页

作者： Nilanjana Sorcar kumar Batuk joshi Elson POliveira jKTomson VNandakumar ESSO–National Centre For Earth Science Studies ThiruvananthapuramKeralaIndia Department of Geology Institute of GeosciencesUniversity of CampinasBrazil

Phase equilibria modelling coupled with U–Pb zircon and monazite ages of garnet–cordierite gneiss from Vallikodu Kottayam in the Kerala Khondalite Belt,southern India are presented *** results suggest that the area attained peak P–T conditions of^900C at 7.5–8 kbar,followed by decompression to 3.5–5 kbar and cooling to 450–480C,preserving signatures of the partial melting event in the field of high to ultra-high temperature *** reintegration models suggest that up to 35%granitic melt could have been produced during metamorphism at^950*** U–Pb age data from zircons(~1.0–~0.7 Ga)and chemical ages from monazites(~540 Ma and^941 Ma)reflect a complex tectonometamorphic evolution of the ***^941 Ma age reported from these monazites indicate a Tonian ultra-high temperature event,linked to juvenile magmatism/deformation episodes reported from the Southern Granulite Terrane and associated fragments in Rodinia,which were subsequently overprinted by the Cambrian(~540 Ma)tectonothermal episode.

关键词： Kerala khondalite belt(KKB) Garnet-cordierite gneiss Partial melting Pseudosection Monazite-zircon geochronology

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Effect of nitrofurazone on the reproductive organs in adult male mice

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Asian journal of Andrology 2001年第1期3卷 39-44页

作者： Shio kumar Singh Sumana Chakravarty Department of Zoology Banaras Hindu University Varanasi IndiaDepartment of Zoology Banaras Hindu University Varanasi India

Aim: To study the effect of 5-nitro-2-fumldehyde semicarbazone (nitrofurazone), a derivative of nitrofuran, onmale reproductive organs of Parkes (P) swain mice. Methods: Mice were given nitrofurazone orally at a dose of 64mg/kg body weight per day, for 10 and 20 days, and were killed 24 h and/or 56 days after the last treatment. Histo-logical appearance of testis, motility and number of spermatozoa in cauda epididymidis, and biochemical indices in epi-didymis and seminal vesicle were evaluated. Results: Histologically, testis showed marked regressive changes inthe seminiferous tubules in mice treated with nitrofurazone. Ten days after treatment, there was much depletion of germcells in the seminiferous tubules, and the germinal epithelium was lined mainly with Sertoli cells, spermatogonia, sper-matocytes, and a few round spermatids; intraepithelial vacuoles and multinucleated giant cells were also observed intubules. By 20 days, regressive changes in the seminiferous tubules were further pronounced, and pachytene spermato-cytes were the most advanced germ cells noticed in the tubules. In severe cases, the tubules were lined with a thin layerof Sertoli cells and spermatogonia. The treatment also caused marked reductions in the motility and number of sperma-tozoa in the cauda epididymidis, in weight and the level of fructose in the seminal vesicle, and in sialic acid level in theepididymis. Fifty six days after drag withdrawal, the alterations induced in the reproductive organs returned to controllevels. Conclusion: Our results suggest that nitrofurazone treatment in P mice induces marked alterations in themale reproductive organs, and that the alterations are reversible following cessation of treatment.(Asian j Androl 2001 Mar; 3: 39-44)

关键词： nitrofurazone testis epididymis seminal vesicles sperm fructose sialic acids

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Intelligent Deep Learning Enabled Human Activity Recognition for Improved Medical Services

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Computer Systems Science & Engineering 2023年第2期44卷 961-977页

作者： E.Dhiravidachelvi M.Suresh kumar L.D.Vijay Anand D.Pritima Seifedine Kadry Byeong-Gwon Kang Yunyoung Nam Department of Electronics and Communication Engineering Mohamed Sathak A.J.College of EngineeringChennai603103India Department of Information Technology Sri Sairam Engineering CollegeChennai602109India Department of Robotics Engineering Karunya Institute of Technology and SciencesCoimbatore641114India Department of Mechatronics Engineering Sri Krishna College of Engineering and TechnologyCoimbatore641008India Deparmtent of Applied Data Science Noroff University CollegeKristiansandNorway Department of Information and Communication Engineering Soonchunhyang UniversityAsanKorea Department of Computer Science and Engineering Soonchunhyang UniversityAsanKorea

Human Activity Recognition(HAR)has been made simple in recent years,thanks to recent advancements made in Artiﬁcial Intelligence(AI)*** techniques are applied in several areas like security,surveillance,healthcare,human-robot interaction,and *** wearable sensor-based HAR system includes in-built sensors,human activities can be categorized based on sensor ***,it can also be employed in other applications such as gait diagnosis,observation of children/adult’s cognitive nature,stroke-patient hospital direction,Epilepsy and Parkinson’s disease examination,***-developed Artiﬁcial Intelligence(AI)techniques,especially Deep Learning(DL)models can be deployed to accomplish effective outcomes on HAR *** this motivation,the current research paper focuses on designing Intelligent Hyperparameter Tuned Deep Learning-based HAR(IHPTDL-HAR)technique in healthcare *** proposed IHPTDL-HAR technique aims at recogniz-ing the human actions in healthcare environment and helps the patients in mana-ging their healthcare *** addition,the presented model makes use of Hierarchical Clustering(HC)-based outlier detection technique to remove the ***-HAR technique incorporates DL-based Deep Belief Network(DBN)model to recognize the activities of ***,Harris Hawks Opti-mization(HHO)algorithm is used for hyperparameter tuning of DBN ***,a comprehensive experimental analysis was conducted upon benchmark dataset and the results were examined under different *** experimental results demonstrate that the proposed IHPTDL-HAR technique is a superior per-former compared to other recent techniques under different measures.

关键词： Artiﬁcial intelligence human activity recognition deep learning deep belief network hyperparameter tuning healthcare

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Gindarudine,a novel morphine alkaloid from Stephania glabra

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Chinese Chemical Letters 2009年第7期20卷 823-826页

作者： Deepak kumar Semwal Usha Rawat Department ofChemistry H.N.B.Garhwal University SrinagarUttarakhand 246174 India

A novel morphine alkaloid, named gindarudine 1 has been isolated from ethanol extract of Stephania glabra tubers, together with four known alkaloids, palmatine, dehydrocorydalmine, stepharanine, and 8-（4＇-methoxybenzyl）-xylopinine. Compound 1 was elucidated as 3,6-O,N-detrimethyl-10-hydroxy-l-methoxy-thebaine by means of spectroscopic data including 2D NMR studies. C 2009 Deepak kumar Semwal. Published by Elsevier B.V. on behalf of Chinese Chemical Society. All rights reserved.

关键词： Stephania glabra Menispermaceae Gindaru Gindarudine

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Generation of VLF Mode Instability by Generalized Distribution Function in the Presence of Parallel AC Electric Field in Uranus

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Plasma Science and Technology 2010年第4期12卷 421-425页

作者： R.S.PANDEY M.SINGH Pramod kumar K.M.SINGH S.kumar Department of Applied Physics Amity School of Science and TechnologyAmity University Noida UP Department of Physics J. L. N. College Chakradharpur Ranchi University Ranch Department of Physics Veer Kunwar Singh University Department of Physics Nalanda college Biharsharif Nalanda MU Bodh Gaya Bihar

VLF （very low frequency） mode instability with parallel AC electric field was studied for generalized loss-cone distribution with an index j, which is reducible to bi-Maxwellian, loss- cone and delta function for j = 0, 1 and co. The particle trajectories and dispersion relation are obtained through a kinetic approach and method of characteristic solutions. The calculations are compared with the observations of low frequency waves of Voyager 2. The growth rate of plasma parameters suited to magnetosphere of Uranus is obtained. It is inferred that the magnitude as well as frequency of AC （alternating current） field increases the growth rate and widen the band width significantly. In addition to temperature anisotropy, particles in plasma having generalized loss-cone distribution provide an additional source of energy.

关键词： generation of VLF mode instability in Uranus

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