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Frontiers of Structural and Civil Engineering 2024年第9期18卷 1445-1465页

作者： Md Marghoobul HAQUE Kunal M.SHELOTE namrata singh Supratic GUPTA Department of Civil Engineering Indian Institute of Technology DelhiNew Delhi 110016India

Concrete is the most widely utilized material for construction purposes,second only to water,in the ever-increasing need for construction *** is a brittle material and possesses a high risk of crack formation and consequent ***,which allows chemicals to enter and can cause concrete structures to lose their physico-mechanical and durability *** and rehabilitating concrete structures involves high costs and leads to various repair methods including coating,adhesives,polymers,supplementary cementitious materials(SCMs),and *** of the latest technologies is the use of microorganisms in *** added microorganisms lead to calcite precipitation and thereby heal the cracks *** study presents a comprehensive literature survey on bacteria-included concrete,before which a bibliographic survey is performed using VOSViewer *** addition to regular bacterial concrete,this study focuses on also using SCMs and fibers in bacterial concrete.A detailed literature review with data representation for various mechanical properties including compressive strength(CS),split tensile strength(SS),and flexure strength(FS),along with durability properties including carbonation,water absorption,resistance against chloride ion penetration,gas permeation,and resistance against cyclic freeze-and-thaw is presented.A study on the use of X-ray computed tomography(XCT)in bacterial concrete is highlighted,and the scope for future research,along with identification of the research gap,is presented.

关键词： bacterial concrete bibliographic survey biomineralization carbonation fibers

Comprehensive analysis of uncertainty quantification for the 58Ni（n,p）58Co reaction cross section

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Chinese Physics C 2024年第9期48卷 174-179页

作者： Mahesh Choudhary Aman Sharma namrata singh Mahima Upadhyay Punit Dubey A.Gandhi Akash Hingu G Mishra Sukanya De L.S.Danu Ajay Kumar R.G.Thomas Saurav Sood Sajin Prasad S.Mukherjee I.N.Ruskov Yu.N.Kopatch A.Kumar Department of Physics Banaras Hindu University Horia Hulubei National Institute of Physics and Nuclear Engineering-IFIN-HH Department of Physics The Maharaja Sayajirao University of Baroda Nuclear Physics Division Bhabha Atomic Research Centre Health Physics Division Bhabha Atomic Research Centre Department of Electrical Power Engineering Brno University of Technology Institute for Nuclear Research and Nuclear Energy Bulgarian Academy of Sciences Joint Institute for Nuclear Research (JINR)

In this study,we measured the58Ni（n,p）58Co reaction cross section with neutron energies of 1.06,1.86,and 2.85 *** cross section was measured using neutron activation techniques and γ-ray spectroscopy,and it was compared with cross section data available in the ***,we calculated the covariance matrix of the measured cross section for the aforementioned nuclear *** uncertainties of the theoretical calculation for58Ni（n,p）58Co reaction cross section were calculated via Monte Carlo *** this study,we used uncertainties in the optical model and level density parameters to calculate uncertainties in the theoretical cross *** theoretical calculations were performed by using *** this study,we aim to analyze the effect of uncertainties of the nuclear model input as well as different experimental variables used to obtain the values of reaction cross section.

关键词： 58Ni(n, p)58Co reaction covariance analysis uncertainty quantification of cross section γ-ray spectroscopy

Assessing the bioremediation potential of arsenic tolerant bacterial strains in rice rhizosphere interface

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Journal of Environmental Sciences 2016年第10期28卷 112-119页

作者： namrata singh Shubhi Srivastava Sushma Rathaur Nandita singh Eco-auditing Group CSIR-National Botanical Research Institute Lucknow 226001 India Department of Biochemistry Banaras Hindu University Varanasi 221001 India

The arsenic tolerant bacterial strains Staphylococcus arlettae （NBRIEAG-6）, Staphylococcus sp. （NBRIEAG-8） and Brevibadllus sp. （NBRIEAG-9） were tested for their roles in enhancing plant growth and induction of stress-related enzymes in rice （Oryza sativa L. cv. NDR-3Bg） plants at two different concentrations, 30 and IS mg/kg of As（V） and As（Ⅲ）, respectively. An experiment was conducted to test the effect of these strains on plant growth promotion and arsenic uptake. We found 30%-40% reduction in total As uptake in bacteria-inoculated plants, with increased plant growth parameters compared to non-inoculated plants. Moreover, the bacteria-inoculated plants showed reduced activity of total glutathione （GSH） and glutathione reductase （GR） compared to their respective controls, which suggests the bacteria-mediated reduction of oxidative stress in plants. Thus, these strains were found to be beneficial in terms of the biochemical and physiological status of the plants under arsenic stress conditions. Furthermore, one-way ANOVA and principal component analysis （PCA） on enzymatic and non-enzymatic assays also revealed clear variations. The results support the distinction between control and treatments in both shoots and roots. Therefore, this study demonstrates the potential of rhizobacteria in alleviating arsenic stress in rice plants.

关键词： Antioxidative enzymeOryza satiua L.Environmental contaminationMetalsSoil bacteria

Investigation of 58Ni(n, p)58Co reaction cross-section with covariance analysis

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Chinese Physics C 2024年第2期48卷 78-90页

作者： Akash Hingu S.Mukherjee Siddharth Parashari Arora Sangeeta A.Gandhi Mahima Upadhyay Mahesh Choudhary Sumit Bamal namrata singh G.Mishra Sukanya De Saurav Sood Sajin Prasad G.Saxena Ajay Kumar R.G.Thomas B.K.Agrawal K.Katovsky A.Kumar Department of Physics Faculty of ScienceThe M.S.University of BarodaVadodara 390002India Faculty of Electrical Engineering and Communication Brno University of TechnologyBrnoCzech Republic Department of Physics Faculty of ScienceUniversity of ZagrebBijenička c.32Zagreb 10000Croatia Department of Physics University Institute of SciencesChandigarh UniversityGharuanMohali 140413PunjabIndia Department of Physics Banaras Hindu UniversityVaranasi 221005India Horia Hulubei National Institute for Physics and Nuclear Engineering Măgurele 077125Romania Nuclear Physics Division Bhabha Atomic Research CentreMumbai 400085India Health Physics Division Bhabha Atomic Research CentreMumbai 400085India Department of Physics(H&S) Government Women Engineering CollegeAjmer 305002India Saha Institute of Nuclear Physics Kolkata 700064India Homi Bhabha National Institute Anushakti NagarMumbai 400094India

The excitation function of the 58Ni(n,p)58Co reaction was measured using the well-established neutron activation technique andγ-ray *** in the energy range of 1.7 to 2.7 MeV were generated using the 7Li(p,n)*** neutron flux was measured using the standard 115In(n,n’)115mIn monitor *** results of the neutron spectrum averaged cross-section of 58Ni(n,p)58Co reactions were compared with existing cross-section data available in the EXFOR data library as well as with various evaluated data libraries such as ENDF/B-VIII.0,JEFF-3.3,JENDL-4.0,and *** calculations were performed using the nuclear reaction code *** nuclear level density(NLD)models were tested,and their results were compared with the present *** NLDs were also obtained through the spectral distribution method(SDM).The cross-section results,along with the absolute errors,were obtained by investigating the uncertainty propagation and using the covariance *** forγ-ray true coincidence summing,low-energy background neutrons,andγ-ray self attenuation were *** experimental cross-section obtained in the present study is consistent with previously published experimental data,evaluated libraries,and theoretical calculations carried out using the TALYS code.

关键词： nuclear reactions (n,p)reaction cross-section measurement covariance analysis nuclear level density

Measurement of(n,α)and(n,2n)reaction cross sections at a neutron energy of 14.92±0.02 MeV for potassium and copper with uncertainty propagation

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Chinese Physics C 2022年第1期46卷 110-117页

作者： A.Gandhi Aman Sharma Rebecca Pachuau1 namrata singh L.S.Danu S.V.Suryanarayana B.K.Nayak A.Kumar Department of Physics Banaras Hindu UniversityVaranasi 221005India Nuclear Physics Division Bhabha Atomic Research CentreMumbai 400085India

Experimentally measured neutron activation cross sections are presented for the ^(65)Cu(n,0)^(62m)Cu,^(41) K(n,a)^(38C)l,and ^(65)Cu(n.2n)^(64)Cu reactions with detailed uncertainty *** neutron cross secions were measured at an incident energy of 14.92±0.02 MeV,and the neutrons were based on the(d,n)a fusion *** ^(27) Al(n,a)^(24)Na reaction was used as a reference reaction for the normalization of the neutron *** pre-calib-rated lead-shielded HPGe detector was used to detect the residues'γ-ray *** data from the measured cross sections are compared to the previously measured cross sections from the EXFOR database,theoretically calculated cross sections using the TALYS and EMPIRE codes,and evaluated nuclear data.

关键词： nuclear reactions (n,a)and(n,2n)reactions t(c/,n)a neutron source uncertainty propagation covariance analysis TALYS-1.9 and EMPIRE-3.2 code

Impact of nutritional support on nutritional status and nitrogen balance in surgical patients of a developing country

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Health 2010年第12期2卷 1382-1389页

作者： Ravindra singh Mohil Nitisha Narayan namrata singh Asheesh Praveen Lal Vishnubhatla Sreenivas Dinesh Bhatnagar 不详

To assess the nutritional status, its change after surgery and impact of nutritional support on urinary nitrogen losses (UNL) and nitrogen balance (NB) based on changing serum albumin levels in a developing country, 89 patient (58 M) aged 39 yrs ±15 were studied. Nutritional assessment was done at admission and 2 weeks postoperatively. UNL and NB was assessed on postoperative day one (D1), two (D2), four (D4), six (D6), eight (D8) and eleven (D11) respectively. Malnutrition varied from 27 (30.3%) using body mass index to 78 (87%) by triceps skin fold thickness. Patients with falling or static serum albumin levels (Group I) showed a significant decrease (‘p’ = 0.001) in their nutritional parameters compared to those with increasing albumin (Group II). Postoperatively till D2 both groups had similar negative NB but Group II improved earlier to become positively balanced by D11 (‘p’ < 0.001). Regression analysis of nitrogen intake (Ni) on UNL on each day revealed negative association till D2 to become positively associated from D4 onwards being significant on D4 (‘p’ = 0.001) & D6 (‘p’ = 0.05*). There is a significant nutritional depletion after surgery especially in patients with falling/static serum albumin levels and NB improves earlier in patients with rising albumin levels. Increasing Ni helps in decreasing UNL.

关键词： Nutritional Status Nitrogen Balance Serum Albumin

Measurement of neutron capture cross section on^(71)Ga at 2.15 and 3.19 MeV and uncertainty propagation and covariance analysis

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Chinese Physics C 2023年第7期47卷 72-80页

作者： Rebecca Pachuau A.Gandhi namrata singh A.Kumar Mayur Mehta S.V.Suryanarayana L.S.Danu B.K.Nayak B.Lalremruata Department of Physics Banaras Hindu UniversityVaranasi-221005India Institute for Plasma Research Gandhinagar-382428India Nuclear Physics Division Bhabha Atomic Research CentreMumbai-400085India Homi Bhabha National Institute AnushaktinagarMumbai-400094India Department of Physics Mizoram UniversityTanhrilAizawl-796004India Horia Hulubei National Institute of Physics and Nuclear Engineering-IFIN-HH Bucharest077125Romania MCNS Manipal Academy of Higher EducationManipal 576104India

The cross section values of the^(71)Ga(n,γ)^(72)Ga reaction are measured,which are 9.14±0.81 mb and 5.74±0.50 mb at 2.15 and 3.19 MeV,*** detailed uncertainty propagation and covariance analysis are also ***^(7)Li(p,n)^(7)Be reaction was used to generate the neutrons,and the neutron flux was normalized using the^(115)In(n,n′)^(115)In^(m)monitor *** measured cross section data are compared with the data available in the EXFOR database,the data obtained using nuclear reaction model codes EMPIRE-3.2 and TALYS-1.95,and also the evaluated nuclear data from ENDF/B-VIII.0 and JEFF-3.1/*** comparison shows that our result at 3.19 MeV is in good agreement with those of EMPIRE-3.2 and JEFF-3.1/*** there are no other measurements available at3.19 MeV,our data could not be compared with literature data at 3.19 MeV,but they are consistent with the cross section values available at 2.98±0.26 and 3.0±0.1 *** result at 2.15 MeV is slightly higher than the literature value available in EXFOR,evaluated value,and theoretically predicted result.

关键词： neutron capture cross section gallium uncertainty propagation and covariance analysis

Erratum:Measurement of(n,α)and(n,2n)reaction cross sections at a neutron energy of 14.92±0.02 MeV for potassium and copper with uncertainty propagation,[***,Aman Sharma,Rebecca Pachuau et al.,***.C 46,014002(2022)]

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Chinese Physics C 2022年第7期46卷 220-220页

作者： A.Gandhi Aman Sharma Rebecca Pachuau namrata singh L.S.Danu S.V.Suryanarayana B.K.Nayak A.Kumar Department of Physics Banaras Hindu UniversityVaranasi 221005India Nuclear Physics Division Bhabha Atomic Research CentreMumbai 400085India

Experimentally measured neutron activation cross sections are presented for the^(65)Cu(n,α)^(62m)Cu,^(41)K(n,α)^(38)Cl,and^(65)Cu(n,2n)^(64)Cu reactions with detailed uncertainty *** neutron cross sections were measured at an incident energy of 14.92±0.02 MeV,and the neutrons were based on the t(d,n)αfusion ***^(27)Al(n,α)^(24)Na reaction was used as a reference reaction for the normalization of the neutron *** pre-calibrated lead-shielded HPGe detector was used to detect the residues'γ-ray *** data from the measured cross sections are compared to the previously measured cross sections from the EXFOR database,theoretically calculated cross sections using the TALYS and EMPIRE codes,and evaluated nuclear data.

关键词： nuclear reactions (na)and(n,2n)reactions t(d,n)a neutron source uncertainty propagation covariance analysis TALYS-1.9 and EMPIRE-3.2 code

Impact of nutritional support on nutritional status and nitrogen balance in surgical patients of a developing country

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Applications of nanoparticles in enhanced oil recovery

Health 2010年第12期

作者： Ravindra singh Mohil Nitisha Narayan namrata singh Asheesh Praveen Lal Vishnubhatla Sreenivas Dinesh Bhatnagar

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Petroleum Research 2022年第1期7卷 77-90页

作者： Anirbid Sircar Kamakshi Rayavarapu namrata Bist Kriti Yadav Surbhi singh Centre of Excellence for Geothermal Energy GandhinagarRaisan382007GujaratIndia

Nanoparticles serve variouspurposes in the hydrocarbon industry which are utilized to improve the volumeof oil and gas *** are used in petroleum applications as nanoparticles,nanosensors,nanocomposites,coated nanoparticles,nanofluids ***,the application of nanotechnology in the enhanced oil recovery(EOR)method helps to extract the trapped oil present beneath the *** nano ultra-fine particles are cost-effective and *** injected fluid interacts with the rock/oil systemto create a favourable environment for oil *** study focuses on a review of the different types of nanoparticles and nanomaterials used in petroleum *** paper aims to study the classification and characterization of *** also includes the physiochemical and mechanical properties of *** study discusses the applications of nanoparticles in chemical,miscible,thermal and microbial *** mainly focuses on various mechanisms involved by adding nanoparticles such as wettability alteration,IFT reduction,rheology improvement,mobility control *** research also addresses new green nanomaterials and nanocomposites,which includes injecting specialized green chemicals(surfactants,alcohols,and polymers)that successfully displace *** IFT between the displacing fluid and the oil is reduced due to phase-behaviour properties.

关键词： Nano technology Nanofluids Enhanced oil recovery Interfacial tension Green nanomaterials