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Biomimetic Fe_(7)S_(8)/Carbon electrocatalyst from[FeFe]-Hydrogenase for improving pH-Universal electrocatalytic hydrogen production Special Collection:Aggregation-Induced Processes and Functions

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Aggregate 2024年第1期5卷 451-459页

作者： Dohun Kim subramani Surendran Sejin Im Jaehyoung Lim Kyoungsuk Jin Ki Tae Nam Uk Sim Department of Energy Science&Engineering Daegu Gyeongbuk Institute of Science&Technology(DGIST)DaeguRepublic of Korea Hydrogen Energy Technology Laboratory Korea Institute of Energy Technology(KENTECH)NajuRepublic of Korea Department of Chemistry Korea UniversitySeoulRepublic of Korea Department of Materials Science and Engineering Seoul National UniversitySeoulRepublic of Korea

Efficient and cost-effective electrocatalysts that can operate across a wide range of pH conditions are essential for green hydrogen *** by biological systems,Fe_(7)S_(8)nanoparticles incorporated on polydopamine matrix electrocatalyst were synthesized by co-precipitation and annealing *** resulting Fe_(7)S_(8)/C electrocatalyst possesses a three-dimensional structure and exhibits enhanced electrocatalytic performance for hydrogen production across various pH ***,the Fe_(7)S_(8)/C electrocatalyst demonstrates exceptional activity,achieving low overpotentials of 90.6,45.9,and 107.4 mV in acidic,neutral,and alkaline environments,*** impedance spectroscopy reveals that Fe_(7)S_(8)/C exhibits the lowest charge transfer resistance under neutral conditions,indicating an improved proton-coupled electron transfer ***-wave electron paramagnetic resonance results confirm a change in the valence state of Fe from 3+to 1+during the hydrogen evolution reaction(HEr).These findings closely resemble the behavior of natural[FeFe]-hydrogenase,known for its superior hydrogen production in neutral *** remarkable performance of our Fe_(7)S_(8)/C electrocatalyst opens up new possibilities for utilizing bioinspired materials as catalysts for the HEr.

关键词： biomimetic electrocatalyst hydrogen production renewable energy

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南印度Tiruvallur区二份标本涂片检查对肺结核诊断的有效性

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结核与肺部疾病杂志 2005年第2期8卷 64-67页

作者： P.G.Gopi r.subramani N.Selvakumar T.Santha S.I.Eusuff P.r.Narayanan 张宗德 Tuberculosis research Centre Chennai India

背景:在南印度Tiruvallur区的一家综合医院及三家周边卫生机构(PHI)。目的:证实在肺结核诊断中二份与三份痰标本显微镜检查在病例发现策略上的有效性。方法:修订国家结核病控制规划(rNTCP)规定每个有症状的就诊于PHI的病人需采用萋尼氏... 详细信息

背景:在南印度Tiruvallur区的一家综合医院及三家周边卫生机构(PHI)。目的:证实在肺结核诊断中二份与三份痰标本显微镜检查在病例发现策略上的有效性。方法:修订国家结核病控制规划(rNTCP)规定每个有症状的就诊于PHI的病人需采用萋尼氏染色方法进行三次痰涂片显微镜检查抗酸杆菌,我们对来自上述中心的结核病实验室登记册资料作了分析。结果:有胸部症状并有三次痰检结果者共7843例,其中895例(11.4%)至少有二次标本为涂阳。二次标本检查中以第1次即时痰及清晨痰(837例,93.5%)及清晨痰及第2次即时痰(843例,94.2%)的检出率最高。结论:二份痰涂片检查(即刻痰及清晨痰)与三次检查具有同等效果。

关键词：南印度 Tiruvallur区标本涂片肺结核抗酸杆菌

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肺结核相关生物学与行为学危险因素的研究

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国际结核病与肺部疾病杂志 2008年第1期3卷 43-46页

作者： C．Kolappan P．G．Gopi r.subramani P．r.Narayanan 郑晓静（译）张宗德（校）王雪静（审） Tuberculosis research Centre Indian Council of Medical ResearchChennai India 不详

目的:用现患优势比(POr)来评估与肺结核有关的独立危险因素,包括年龄、性别、吸烟、嗜酒等。方法:自2001年6月—2003年12月进行了社区横断面调查。在南印度的一个区随机抽取的村庄中,共调查年龄≥15岁的村民93945人,用胸部症状和胸部X光... 详细信息

目的:用现患优势比(POr)来评估与肺结核有关的独立危险因素,包括年龄、性别、吸烟、嗜酒等。方法:自2001年6月—2003年12月进行了社区横断面调查。在南印度的一个区随机抽取的村庄中,共调查年龄≥15岁的村民93945人,用胸部症状和胸部X光片(MMr)作为筛查肺结核的指征。具有上述2项指征之一的病人均留取痰标本2份(1份现场留取,1份次日清晨留取):1份用于痰涂片镜检抗酸杆菌,1份用于结核分枝杆菌培养。痰涂片或培养阳性的病例被判定为菌阳病例。此外,只在男性人群中收集吸烟和饮酒史资料,所有女性均认为无吸烟、饮酒史。结果:调查期间共诊断了429例菌阳病例。年龄、性别、吸烟和嗜酒的校正POrs(用95%可信区间)分别为3.3(2.7—4.1)、2.5(1.9—3.3)、2.1(1.7—2.7)和1.5(1.2—2.0)。结论:年龄、性别、吸烟和嗜酒等危险因素与肺结核独立相关,年龄、性别因素较吸烟、嗜酒相关性更强。

关键词：结核,肺危险因素嗜酒吸烟现患优势比

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南印度社区在开始实施DOTS时的结核病患病率基线调查

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结核与肺部疾病杂志 2004年第2期7卷 76-83页

作者： P.G.Gopi r.subramani S.radhakrishna C.Kolappan K.Sadacharam T.S.Devi T.r.Frieden P.r.Narayanan 邹级谦屠德华张立兴 TuberculosisresearchCentre Chennai InstituteforresearchinMedicalStatistics Chennai StopTBUnit WorldHealthOrganizationSouthEastAsiaRegionalOfficeNewDelhiIndia 不详

目的:确定南印度某实施 DOTS 社区的基线培阳、涂阳结核病患病率以及年结核感染率(ArTI)。方法:在 Tiruvallur 地区采用随机整群抽样方法抽取50 个农村及 3 个城区。对所有≥15 岁的成人进行相关症状调查及放射学检查,并对其中具有异常... 详细信息

目的:确定南印度某实施 DOTS 社区的基线培阳、涂阳结核病患病率以及年结核感染率(ArTI)。方法:在 Tiruvallur 地区采用随机整群抽样方法抽取50 个农村及 3 个城区。对所有≥15 岁的成人进行相关症状调查及放射学检查,并对其中具有异常阴影和/或有胸部症状者进行痰涂片和培养检查。在另外73 个村和 3 个城区的整群样本中,对所有<10 岁的儿童进行结核菌素试验。结果:培阳及涂阳患病率分别为 605/10 万和 323/10万。二者均随年龄略有增高,且在所有年龄组男性明显高于女性:培阳及涂阳患病率的男女之比分别为 5.5:1 和 6.5:1。10 岁以下儿童的结核年感染率为1.6%,无性别差异。30 多年来,培阳及涂阳患病率均有所下降,年递降率分别为 1.8%和 2.1%。结论:结核病是印度南部农村的主要卫生问题,其培阳及涂阳患病率分别为 605/10 万和 323/10 万。

关键词：南印度社区结核病 DOTS 基线调查患病率

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高流行区进行社区调查发现肺结核病例的意义:南印度Tirrvallur地区的一项比较性研究报告

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国际结核病与肺部疾病杂志 2003年第3期 81-88页

作者： T.Santha Garg renu T.r.Frieden r.subramani P.G.Gopi V.Chandrasekaran N.Selvakumar A.Thomas r.rajeswari r.Balasubramanian C.Kolappan P.r.Narayanan 贺晓新 Tuberculosis research Centre Model DOTS project ChennaiTamil Nadu India

背景:在南印度的Tirrvallur地区,作为DOTS项目的一部分,肺结核病人的发现主要由卫生机构(HF)来完成;另外,作为正在进行的一项流行病学研究的组成部分,通过社区调查(CS)对成人进行筛检也可以发现一部分病例。目的:对一年内由HF和CS发现... 详细信息

背景:在南印度的Tirrvallur地区,作为DOTS项目的一部分,肺结核病人的发现主要由卫生机构(HF)来完成;另外,作为正在进行的一项流行病学研究的组成部分,通过社区调查(CS)对成人进行筛检也可以发现一部分病例。目的:对一年内由HF和CS发现的所有病人的社会人口学、临床学、细菌学特征以及治疗结局进行比较。结果:在32663名受调查的成人患者中共发现100例涂阳以及 116例涂阴肺结核病人;在65例已经开始化疗的涂阳病例中,44例已治愈。与HF病人相比,CS病人一方面年龄偏大(AOr=1.9)、男性较多(AOr=2.7)、文化程度较低(AOr=1.7)、居住条件较差(AOr=2.0);另一方面CS病人咳嗽3周以上(AOr=3.4)的比例以及涂阳比例较低(AOr=4.2)。在61名新发现涂阳CS病人中,40人报告有胸痛症状;其中32人(80％)已经就诊过,但未确诊。结论:即使在结核病高流行地区,社区调查对于肺结核病例发现也价值甚微。通过社区调查所发现的病例症状轻、传染性小,而且不到一半的人已经治愈。诊断性检查应面向年长、文化程度低的男性。

关键词：结核病病例发现 DOTS 印度

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recent trends and morphology mechanisms of rare-earth based BiFeO_(3) nano perovskites with excellent photocatalytic performances

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Journal of rare Earths 2023年第3期41卷 331-341,I0001页

作者： subramani Supriya Department of Inorganic Chemistry University of Chemistry and Technology PragueTechnick’a 516628Prague 6Czech Republic

The multiferroic bismuth ferrite(BiFeO_(3),denoted as BFO)semiconductors have attracted prominent recognition due to their unique physical properties and prospective industrial *** features like strong photo absorption and morphological structure play a major role in rare earth-based BFO *** article encapsulates the latest developments on rare-earth-based nano BFO as new class photo catalytic materials for electro-optic *** discussion on degradation efficiencies of industrial organic dyes in ultra-violet,visible light,and near infra-red photocatalysis was carried *** various techniques acquired to fabricate rare-earth-based BFO and the modification approaches in A-and B-site that take part in the morphology,and photo activity improvement were also *** review also summarizes the existing state of research work and explains some practical ideologies of BiFeO_(3) for their future ***,this article discusses the summary and future aspects of the present challenges faced by the BFO based materials for feasible improvements.

关键词： BiFeO_(3) Photocatalysis Morphology Organic dyes Nano rare earths

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Efficient Approach for resource Allocation in WPCN Using Hybrid Optimization

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Computers, Materials & Continua 2022年第7期72卷 1275-1291页

作者： richu Mary Thomas Malarvizhi subramani Department of Electronics and Communication Engineering SRMISTKattankulathur603203India

The recent aggrandizement of radio frequency(rF)signals in wireless power transmission combined with energy harvesting methods have led to the replacement of traditional battery-powered wireless networks since the blooming rF technology provides energy renewal of wireless devices with the quality of service(QoS).In addition,it does not require any unnecessary alterations on the transmission hardware side.A hybridized global optimization technique uniting Global best and Local best(GL)based particle swarm optimization(PSO)and ant colony optimization(ACO)is proposed in this paper to optimally allocate resources in wireless powered communication networks(WPCN)through coordinated operation of communication groups,in which the wireless energy transfer and information sharing take place concomitantly by the aid of a cooperative relay positioned in between the communicating *** designed algorithm assists in minimizing power consumption and maximizes the weighted sum rate at the end-user *** the principal target of the system is coordinated optimization of energy beamforming along with time and energy allocation to reduce the total energy consumed combined with assured information rates of the communication *** outputs are presented to manifest the proposed system’s performance to verify the analytical results via simulations.

关键词： Wireless powered communication networks cooperative communication relay hybrid optimization technique ant colony optimization particle swarm optimization

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Possible therapeutic role of short-chain fatty acids from skin commensal bacteria in UVB-induced skin carcinogenesis

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BIOCELL 2023年第10期47卷 2195-2205页

作者： PAVITHrA subramani rAUNAK KUMAr DAS Centre for Biomaterials Cellular&Molecular Theranostics(CBCMT)Vellore Institute of Technology(VIT)Vellore632014India School of Biosciences and Technology(SBST) Vellore Institute of Technology(VIT)Vellore632014India

Solar ultraviolet B(UVB)radiation is a major skin cancer-causing ***,promotion,and progression are the diverse phases of UVB-induced *** to UVB causes abnormalities in a series of biochemical and molecular pathways:thymine dimer formation,DNA damage,oxidative stress,inflammatory responses,and altered cell signaling,eventually resulting in tumor *** increased skin cancer rates urge researchers to develop more efficient drugs,but synthetic chemotherapeutic drugs have more contrary effects and drug resistance issues,which have been reported *** current review focuses on the relationship between microbes and *** skin acts as a barrier against the external environment and serves as a protective shield for its inhabitant microbiota,collectively called skin *** gut microbiome plays a vital role in cancer *** of short-chain fatty acids(SCFAs)such as butyrate,acetate,and propionate by intestinal microbes has anti-cancer properties against various cancer cell ***,the knowledge of SCFAs produced by skin microbes remains yet to be elucidated *** this review,we strive to summarize the findings of studies performed to date regarding the anti-cancer properties of SCFA against various cancer cell lines and provide insight into future directions in the skin microbiome field.

关键词： Photo carcinogenesis UVB radiation Intestinal microbiota Small chain fatty acids

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Effect of transverse compression on the residual tensile strength of ultrahigh molecular weight polyethylene(Dyneema~? SK-76) yarns

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Defence Technology（防务技术） 2020年第1期16卷 35-42页

作者： Karan Shah subramani Sockalingam McNAIr Center for Aerospace Innovation and research University of South CarolinaSCUSA Department of Mechanical Engineering University of South CarolinaSCUSA

Ballistic impact induces complex stress states on fiber-based armor *** impact fibers undergo multiaxial loading which includes axial tension,axial compression,transverse compression,and transverse *** co mpression induced by the projectile leads to permanent defo rmation and fibrillation of fibers resulting in degradation of material tensile *** work(Sockalingam et *** res.J 2018) has shown a reduction of 20% in the tensile strength of Dyneema~? SK76 single fibers subjectet to 77% nominal transverse compressive *** investigation of quasistatic transverse compression on Dyneema~? SK-76 yarns,unconstrained in the lateral direction,indicate an average of 4% reduction in tensile strength of yarns compressed to 77% nominal *** this work we use finite element modeling techniques to understand the difference in residual tensile strength between single fibers and yarns observed in laterally unconstrained transverse compression *** element study of the transverse compression response of single fibers and yarns indicate that local strains developed in fibers within the yarn are much lower than the local strains developed in single fibers subjected to a given nominal strain and may explain the less reduction in strength observed in yarns.

关键词： Polymer fibers Compression Tensile strength

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Organometallic L-Alanine Cadmium Iodide Crystals for Optical Device Fabrication

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Journal of Electronic Science and Technology 2022年第4期20卷 345-355页

作者： Kathiravan Vaiyapuri Thangavel subramani Ashok Kumar rajamani Muthu Lakshmi Thangavel Satheesh Kumar Ganesan Selvarajan Palanisamy Kumaresavanji Malaivelusamy Crystal Growth Laboratory PG and Research Department of PhysicsGovernment Arts College(Autonomous)Karur 639005 PG and research Department of Physics Thiruvalluvar Government Arts CollegeRasipuram 637401 PG and research Department of Physics Jairam College of Arts and ScienceKarur 639003 PG and research Department of Physics National College(Autonomous)Tiruchirappalli 620001 Department of Physics Aditanar College of Arts and ScienceTiruchendur 628216

Single crystals of L-alanine cadmium iodide(LACI)were grown by the slow evaporation technique at room temperature.A single-crystal X-ray diffraction(SXrD)model was used to evaluate the crystal structure of the as-grown LACI *** energy dispersive X-ray(EDX)analysis and ultraviolet-visible-near infrared(UV-vis-NIr)transmittance studies were carried out,and the results reveal the presence of elements in the title *** the transmittance data,the optical bandgap as a function of photon energy was estimated,and the different optical constants were calculated.A fluorescence study was performed for the LACI *** and differential thermal analyses have also been studied to investigate the thermal property of the LACI *** efficiency of the second harmonic generation(SHG)of the title crystal was *** magnetic and electrical properties were estimated by the vibrating sample magnetometer(VSM)analysis and impedance study,respectively.

关键词： Fluorescence impedance thermal analysis vibrating sample magnetometer(VSM) X-ray diffraction

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