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Heavy Metal Accumulation Potential of Some Wetland Plants Growing Naturally in the city of Kolkata, India

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American Journal of Plant Sciences 2016年第15期7卷 2112-2137页

作者： Poulami Jha Alok c. Samal subhash c. Santra Anjana Dewanji Agricultural and Ecological Research Unit Indian Statistical Institute Kolkata India Department of Environmental Science University of Kalyani Kalyani India

Freshwaters are not only used locally in many developing countries but they are often over exploited for domestic purposes, agriculture and disposal of industrial wastes which result in an overload of excess nutrients, harmful chemicals and heavy metals. Plant species together with sediments and water samples collected from eleven aquatic water bodies in the vicinity of industrial units in Kolkata were studied for their potential to uptake Pb, cd and cr under field conditions. cd and cr concentrations in the sediments were higher than background values considered to be toxic. Alternanthera philoxeroides and Eichhornia crassipes were the two invasive species present, with the former being more widely distributed. Among native plants, Ipomoea aquatica was the most abundant. Metal uptake in the plants differed among species, tissues and sites. Pb and cd accumulation in root tissues for all plants in most sites suggested an exclusion strategy for metal tolerance. Since I. aquatica is widely consumed in many parts of SE Asia, its metal content should be checked before use since it was found to efficiently translocate both Pb and cd from roots to shoots. The potential of A. philoxeroides as a metal excluder needs to be explored further since it translocates less to its shoots as compared to E. crassipes and I. aquatica.

关键词： Alternanthera philoxeroides Eichhornia crassipes Invasive Ipomoea aquatica Lead (Pb) cadmium (cd) chromium (cr)

Microstructure and dry sliding wear behavior of cu-Sn alloy reinforced with multiwalled carbon nanotubes

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Transactions of Nonferrous Metals Society of china 2016年第7期26卷 1755-1764页

作者： H.M.MALLIKARJUNA K.T.kashyap P.G.KOPPAD c.S.RAMESH R.KESHAVAMURTHY Advanced composites Research centre (AcRc) P E S Institute of Technology Department of Mechanical Engineering GEC Department of Mechanical Engineering Atria Institute of Technology Research and Development Rapsri Engineering Products Company Ltd. Department of Mechanical Engineering Alliance College of Engineering and Design Alliance University Department of Mechanical Engineering Dayananda Sagar College of Engineering

Multiwalled carbon nanotubes （MWcNTs） reinforced cu-Sn alloy based nanocomposite was developed by powder metallurgy route. The mass fraction of cNTs was varied from 0 to 2% in a step of 0.5%. The developed nanocomposites were subjected to density, hardness, electrical conductivity, and friction and wear tests. The results reveal that the density of nanocomposite decreases with the increase of the mass fraction of cNTs. A significant improvement in the hardness is noticed in the nanocomposite with the addition of cNTs. The developed nanocomposites show low coefficient of friction and improved wear resistance when compared with unreinforced alloy. At an applied load of 5 N, the coefficient of friction and wear loss of 2%cNTs reinforced cu-Sn alloy nanocomposite decrease by 72% and 68%, respectively, compared with those of cu-Sn alloy. The wear mechanisms of worn surfaces of the composites are reported. In addition, the electrical conductivity reduces with the increase of the content of cNTs.

关键词： cu-Sn alloy carbon nanotube nanocomposites powder metallurgy microstructure sliding wear

Laser-induced periodic surface structured electrodes with 45% energy saving in electrochemical fuel generation through field localization

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Opto-Electronic Advances 2022年第11期5卷 29-44页

作者： chaudry Sajed Saraj subhash c.Singh Gopal Verma Rahul A Rajan Wei Li chunlei Guo GPL Photonics Lab State Key Laboratory of Applied OpticsChangchun Institute of OpticsFine Mechanics and PhysicsChinese Academy of SciencesChangchun 130033China University of chinese Academy of Sciences(UcAS) Beijing 100049China The Institute of Optics University of RochesterRochesterNY 14627USA

Electrochemical oxidation/reduction of radicals is a green and environmentally friendly approach to generating *** reactions,however,suffer from sluggish kinetics due to a low local concentration of radicals around the electrocatalyst.A large applied electrode potential can enhance the fuel generation efficiency via enhancing the radical concentration around the electrocatalyst sites,but this comes at the cost of ***,we report about a~45%saving in energy to achieve an electrochemical hydrogen generation rate of 3×10^(16) molecules cm^(–2)s^(–1)(current density:10 mA/cm^(2))through localized electric field-induced enhancement in the reagent concentration(LEFIRc)at laser-induced periodic surface structured(LIPSS)*** finite element model is used to simulate the spatial distribution of the electric field to understand the effects of LIPSS geometric parameters in field *** the LIPSS patterned electrodes are used as substrates to support Pt/c and RuO_(2) electrocatalysts,the η_(10) overpotentials for HER and OER are decreased by 40.4 and 25%,***,the capability of the LIPSS-patterned electrodes to operate at significantly reduced energy is also demonstrated in a range of electrolytes,including alkaline,acidic,neutral,and ***,when two LIPSS patterned electrodes were assembled as the anode and cathode into a cell,it requires 330 mVs of lower electric potential with enhanced stability over a similar cell made of pristine electrodes to drive a current density of 10 mA/cm^(2).This work demonstrates a physical and versatile approach of electrode surface patterning to boost electrocatalytic fuel generation performance and can be applied to any metal and semiconductor catalysts for a range of electrochemical reactions.

关键词： electric field localization hotspot formation laser-induced periodic surface structures electrochemical fuel generation overall water splitting

Effect of carbon nanotube and silicon carbide on microstructure and dry sliding wear behavior of copper hybrid nanocomposites

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Transactions of Nonferrous Metals Society of china 2016年第12期26卷 3170-3182页

作者： H.M.MALLIKARJUNA c.S.RAMESH P.G.KOPPAD R.KESHAVAMURTHY K.T.kashyap Advanced composites Research centre P E S Institute of Technology Department of Mechanical Engineering Government Engineering College Department of Mechanical Engineering Alliance College of Engineering & DesignAlliance University Department of Mechanical Engineering CMR Institute of Technology Department of Mechanical Engineering Dayananda Sagar College of Engineering Department of Mechanical Engineering School of Engineering and TechnologyJain University

Microstructure and tribological properties of copper-based hybrid nanocomposites reinforced with copper coatedmultiwalled carbon nanotubes (MWcNTs) and silicon carbide (Sic) were studied. carbon nanotube was varied from 1% to 4% withsilicon carbide content being fixed at 4%. The synthesis of copper hybrid nanocomposites involves ball milling, cold pressing andsintering followed by hot pressing. The developed hybrid nanocomposites were subjected to density, grain size, and hardness *** tribological performances of the nanocomposites were assessed by carrying out dry sliding wear tests using pin-on-steel disctribometer at different loads. A significant decrease in grain size was observed for the developed hybrid composites when comparedwith pure copper. An improvement of 80% in the micro-hardness of the hybrid nanocomposite has been recorded for 4% carbonnanotubes reinforced hybrid composites when compared with pure copper. An increase in content of cNTs in the hybridnanocomposites results in lowering of the friction coefficient and wear rates of hybrid nanocomposites.

关键词： copper carbon nanotubes (cNTs) Sic microhardness wear mechanisms nanocomposite

Detection of dengue NS1 antigen,alongside IgM plus IgG and concurrent platelet enumeration during an outbreak

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Asian Pacific Journal of Tropical Medicine 2011年第8期4卷 672-672页

作者： subhash c Arya Nirmala Agarwal Satish c Parikh Sant Parmanand Hospital Delhi

During the late incubation period or initial phase of dengue virus infection,laboratory confirmation is through viral isolation in cell culture and/or molecular investigations, or immunofluorescence,or immunohistochemistry[1].The dengue virus non-structural antigen NSl that would develop before the appearance of dengue IgM and/or IgG is emerging as a suitable option for dengue diagnosis[2].Platelet therapy is a standard clinical practice for dengue patients with severe thrombocytopenia[3].However,during introductory screening,platelet count is not being done in many cases. This results in delays of platelet therapy. In the course of the current(2010) spurt of dengue in New Delhi[4],simultaneous screening for NSl,IgM and IgG and platelet enumeration has been introduced at the

关键词： IgM IgG Detection of dengue NS1 antigen,alongside IgM plus IgG and concurrent platelet enumeration during an outbreak NS

Anti-inflammatory and anti-arthritic activity of type-A procyanidine polyphenols from bark of cinnamomum zeylanicum in rats

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Food Science and Human Wellness 2013年第2期2卷 59-67页

作者： Sachin Vetal subhash L.Bodhankar Vishwaraman Mohan Prasad A.Thakurdesai Department of Pharmacology Poona College of PharmacyBharati Vidyapeeth Deemed UniversityErandwanePune 411038India Indus Biotech Private Limited 1Rahul ResidencyOff Salunke Vihar RoadKondhwaPune 411048India

Type-A procyanidine polyphenols(TAPP)are reported to have immunomodulatory and anti-inflammatory potential in *** objective of present work is to evaluate potential of TAPP extracted from cinnamon(cinnamomum zeylanicum)bark in animal models of inflammation and rheumatoid arthritis in ***-induced rat paw edema(cPE)and adjuvant induced established arthritis(AIA),in rats were used as the experimental models for inflammation and arthritis *** activity was evaluated in Randall–Selitto assay in AIA *** showed significant anti-inflammatory effect at dose of 4,8 and 25 mg/kg,*** not at 2 mg/kg,*** in cPE *** dose of 8 mg/kg,*** selected for the evaluation of anti-arthritic activity in AIA ***(8 mg/kg,p.o.,daily from day-12 to day-21)treatment in established arthritic rats showed significant reversal of changes induced in AIA with respect to body weight drop(cachexia),ankle diameter,arthritic score,serum c-reactive protein(cRP)***,TAPP was found to be non-ulcerogenic as compared to AIA control ***,TAPP did not show analgesic effect on AIA-induced pain as seen in Randall–Selitto *** conclusion,TAPP showed disease-modifying potential in animal models of inflammation and arthritis in rats.©2013 Beijing Academy of Food *** and hosting by Elsevier *** rights reserved.

关键词： Type-A procyanidine polyphenols cinnamon bark Anti-inflammatory Rheumatoid arthritis

Indian medicinal plants are effective in the treatment and management of cOVID-19

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BIOcELL 2023年第4期47卷 677-695页

作者： subhash cHANDRA SANTWANA PALAI EDINARDO FAGNER FERREIRA-MATIAS IVO cAVALcANTE PITA-NETO cÍcERO LUcAS GOMES-RAMALHO EDLANE MARTINS DE ANDRADE RAY SILVA DE ALMEIDA MARcELLO IRITI HENRIQUE DOUGLAS MELO-cOUTINHO Department of Pharmaceutical chemistry SGRR UniversityUttarakhand248001India Department of Pharmaceutical chemistry HNB Garhwal UniversitySrinagar246174India Department of Veterinary Pharmacology&Toxicology College of Veterinary Science and Animal HusbandryBhubaneswar751003India cEcAPE—college of Dentistry Juazeiro do Norte63050-203Brazil Department of Biological chemistry Regional University of CaririCrato63105-000Brazil Department of Biomedical Surgical and Dental SciencesUniversitàdegli Studi di MilanoMilan20133Italy National Interuniversity consortium of Materials Science and Technology Florence50121Italy

Indian medicinal plants are referred to as the“nectar of life”owing to their phytochemicals and bioactive complexes that are beneficial in treating *** disease 2019(cOVID-19)is a global health issue without any proper *** indigenous plants of India can be exploited to control the precise signs of *** Ministry of AYUSH(Ayurveda,Yoga and Naturopathy,Unani,Siddha,and Homeopathy)has advised routine usage of medicinal plants for *** plants like Zingiber officinalis,Azadirachta indica,Ocimum sanctum,Nigella sativa,Withania somnifera,curcuma longa,Piper nigrum,Allium sativum,Tinospora cordifolia,*** immunity-boosting,antiviral,antibacterial,antioxidant and anti-inflammatory actions that can suppress and treat symptoms of *** vitro,in vivo as well as in silico validation,these phytochemicals can help us to manage and treat cOVID-19 *** integration of traditional knowledge in the prophylaxis of corona infection and current skills validating it for the development of precise and powerful therapeutic approaches will more efficiently resolve different clinical aspects of *** review focuses on both traditional and emergent methods to prevent and treat cOVID-19 with various Indian medicinal plants along with their phytochemicals.

关键词： Antiviral corona virus Diagnosis Immunity Herbs

Multi-scale processes influencing global carbon storage and land-carbon-climate nexus:A critical review

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Pedosphere 2023年第2期33卷 250-267页

作者： Owais Ali WANI Shamal Shasang KUMAR Nazir HUSSAIN Anas Ibni Ali WANI subhash BABU Parvej ALAM Megna RASHID Simona Mariana POPEScU Sheikh MANSOOR Division of Soil Science and Agricultural chemistry Sher-e-Kashmir University of Agricultural Sciences and Technology(SKUAST)Kashmir 193201(India) Division of Agronomy SKUASTKashmir 193201(India) Shri Mata Vaishno Devi University Katra 182301(India) Division of Agronomy ICAR-Indian Agricultural Research InstituteNew Delhi 110012(India) Department of Biology College of Science and HumanitiesPrince Sattam Bin Abdulaziz UniversityAlkharj 11942(Saudi Arabia) Faculty of Forestry SKUASTKashmir 191201(India) Department of Biology and Environmental Engineering University of CraiovaCraiova 200585(Romania) Division of Biochemistry Faculty of Basic SciencesSKUASTJammu 180009(India)

carbon(c)is a key constitutive element in living organisms(plants,microbes,animals,and humans).carbon is also a basic component of agriculture because it plays a dynamic role in crop growth,development,nutrient cycling,soil fertility,and other agricultural *** presence of c enhances soil physical,chemical,and biological *** c cycle supports all life on the Earth by transferring c between living organisms and the *** global climate is changing,and this change is attributable to the release of carbon dioxide and other greenhouse gases from human *** to the global climate change,agriculture is expected to be majorly *** production is directly linked to the *** five main global c pools are the oceanic,geologic,pedologic,atmospheric,and biotic pools,with specific reservoirs and inter-pool *** soil organic matter has various organic c pools(active,slow,and passive pools),containing various c-based fractions and specific liability ***,geology,land use,and management techniques are some of the variables that affect organic c and its *** dynamics of each of these variables must be understood for a thorough knowledge of how they impact the soil c pools and storage capacity under the changing climate *** review provides a comprehensive overview of the various factors that affect soil c pools/fractions and their c sequestration capacity.

关键词： carbon dynamics carbon pools carbon sequestration climate change climate-smart agriculture land use management practice soil organic carbon

Surface engineering of ZnO electrocatalyst by N doping towards electrochemical cO_(2) reduction

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Journal of Energy chemistry 2024年第1期88卷 71-81,I0002页

作者： Rohini subhash Kanase Getasew Mulualem Zewdie Maheswari Arunachalam Jyoti Badiger Suzan Abdelfattah Sayed Kwang-Soon Ahn Jun-Seok Ha Uk Sim Hyeyoung Shin Soon Hyung Kang Department of Interdisciplinary Program for Photonic Engineering Chonnam National UniversityGwangju 61186Republic of Korea Graduate School of Energy Science and Technology(GEST) Chungnam National University99 Daehak-roYuseong-guDaejeon 34134Republic of Korea Department of chemistry Education and Optoelectronic convergence Research center Chonnam National UniversityGwangju 61186Republic of Korea Department of Advanced chemicals and Engineering Chonnam National UniversityGwangju 61186Republic of Korea School of chemical Engineering Yeungnam UniversityGyeongsan 38541Republic of Korea Department of Energy Engineering Korea Institute of Energy Technology(KENTECH)Naju 58217Republic of Korea

The discovery of efficient,selective,and stable electrocatalysts can be a key point to produce the largescale chemical fuels via electrochemical cO_(2) reduction(EcR).In this study,an earth-abundant and nontoxic ZnO-based electrocatalyst was developed for use in gas-diffusion electrodes(GDE),and the effect of nitrogen(N)doping on the EcR activity of ZnO electrocatalysts was ***,a ZnO nanosheet was prepared via the hydrothermal method,and nitridation was performed at different times to control the N-doping *** an increase in the N-doping content,the morphological properties of the nanosheet changed significantly,namely,the 2D nanosheets transformed into irregularly shaped ***,the EcR performance of Zn O electrocatalysts with different N-doping content was assessed in 1.0 M KHcO_(3) electrolyte using a gas-diffusion electrode-based EcR *** the EcR activity increased after a small amount of N doping,it decreased for higher N doping *** them,the N:ZnO-1 h electrocatalysts showed the best cO selectivity,with a faradaic efficiency(FE_(cO))of 92.7%at-0.73 V *** hydrogen electrode(RHE),which was greater than that of an undoped Zn O electrocatalyst(FE_(cO)of 63.4%at-0.78 V_(RHE)).Also,the N:ZnO-1 h electrocatalyst exhibited outstanding durability for 16 h,with a partial current density of-92.1 mA cm^(-2).This improvement of N:ZnO-1 h electrocatalyst can be explained by density functional theory calculations,demonstrating that this improvement of N:ZnO-1 h electrocatalyst comes from(ⅰ)the optimized active sites lowering the free energy barrier for the rate-determining step(RDS),and(ⅱ)the modification of electronic structure enhancing the electron transfer rate by N doping.

关键词： ZnO N-doped ZnO Gas-diffusion electrode cO Selectivity Electrochemical cO_(2)reduction