检索结果-南通市图书馆

Development of timer based on liquid level measurement system

在线全文

学校读者我要写书评

暂无评论

Journal of Measurement Science and Instrumentation 2016年第4期7卷 383-387页

作者： Banajit chakraborty T K Maiti Department of Applied Electronics and Instrumentation Engineering Netaji Subhash Engineering CollegeKolkata 700152India

This paper describes the design and development of the timer based on liquid level measurement system in which timer 555 is used in astable mode. The capacitor charging time i. e. the ON time pulse width of the timer output waveform which is measured using a digital storage oscillator （DSO）,is linearly proportional to the capacitance of a co-axial cylindrical capacitive transducer, and this capacitance once again linearly varies with the change in liquid level. Hence, we obtain a linear relationship between the liquid level and the capacitor charging time. The main advantages of this developed system are linear input-output relationship, small in size, easily portable, cost effective, and independent on the ambient temperature effect. The system can also be exploited to measure dielectric constant of liquid or solid in various process industries.

关键词： timer IC555 liquid level measurement system capacitor charging time co-axial cylindrical capacitive transducer

Entropy contributions to phase stability in binary random solid solutions

在线全文

学校读者我要写书评

暂无评论

npj Computational Materials 2018年第1期4卷 262-271页

作者： Anus Manzoor Shubham Pandey Debajit chakraborty Simon R.Phillpot Dilpuneet S.Aidhy Department of Mechanical Engineering University of WyomingLaramieWY 82071USA Department of Materials Science and Engineering University of FloridaGainesvilleFL 32611USA

High entropy alloys contain multiple elements in large proportions that make them prone to phase *** alloys generally have shallow enthalpy of mixing which makes the entropy contributions of similar *** a result,the phase stability of these alloys is equally dependent on enthalpy and entropy of mixing and understanding the individual contribution of thermodynamic properties is *** the overall vision of designing high entropy alloys,in this work,using density functional theory calculations,we elucidate the contributions of various entropies,i.e.,vibrational,electronic and configurational towards the phase stability of binary *** show that the contribution of electronic entropy is very small compared to the vibrational and configurational entropies,and does not play a significant role in the phase stability of *** configurational and vibrational entropies can either destabilize or can collectively contribute to stabilize the solid *** a result,even those systems that have negative mixing enthalpy can show phase instability,revealed as a miscibility gap;conversely,systems with positive mixing enthalpy can be phase stable due to entropic *** suggest that including entropic contributions are critical in the development of theoretical framework for the computational prediction of stable,single-phase high entropy alloys that have shallow mixing enthalpies,unlike ordered intermetallics.

关键词： alloys stability mixing

Altered gut microbiota patterns in COVID-19:Markers for inflammation and disease severity

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

World Journal of Gastroenterology 2022年第25期28卷 2802-2822页

作者： Chiranjib chakraborty Ashish Ranjan Sharma Manojit Bhattacharya Kuldeep Dhama Sang-Soo Lee School of Life Science and Biotechnology Adamas UniversityKolkata 700126India Institute for Skeletal Aging&Orthopaedic Surgery Hallym UniversityChuncheon-si 24252South Korea Department of Zoology Fakir Mohan UniversityBalasore 756020India Division of Pathology Indian Council of Agricultural Research(ICAR)-Indian Veterinary Research Institute(IVRI)Bareilly 243122Uttar PradeshIndia Institute for Skeletal Aging&Orthopedic Surgery Hallym UniversityChuncheon-si 24252South Korea

The severe acute respiratory syndrome coronavirus 2(SARS-CoV-2)infection leads to a severe respiratory illness and alters the gut microbiota,which dynamically interacts with the human immune *** alterations include decreased levels of beneficial bacteria and augmentation of opportunistic ***,we describe critical factors affecting the microbiota in coronavirus disease 2019(COVID-19)*** include,such as gut microbiota imbalance and gastrointestinal symptoms,the pattern of altered gut microbiota composition in COVID-19 patients,and crosstalk between the microbiome and the gut-lung axis/gut-brain-lung ***,we have illustrated the hypoxia state in COVID-19 associated gut microbiota *** role of ACE2 in the digestive system,and control of its expression using the gut microbiota is discussed,highlighting the interactions between the lungs,the gut,and the brain during COVID-19 ***,we address the gut microbiota in elderly or co-morbid patients as well as gut microbiota dysbiosis of in severe *** clinical trials to understand the role of probiotics in COVID-19 patients are listed in this *** inflammation is one of the major driving forces for COVID-19 symptoms and gut microbiome disruption and is associated with disease ***,understanding the role of the gut microbiota in immune modulation during SARS-CoV-2 infection may help improve therapeutic strategies for COVID-19 treatment.

关键词： COVID-19 Inflammation Gut microbiota Therapeutic

PPARγLBD and its ligand specificity reveal a selection of potential partial agonist:Molecular dynamics based T2D drug discovery initiative

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

BIOCELL 2021年第4期45卷 953-961页

作者： BIDYUT MALLICK ASHISH RANJAN SHARMA MANOJIT BHATTACHARYA SANG-SOO LEE CHIRANJIB chakraborty Department of Applied Science Galgotias College of Engineering and TechnologyKnowledge Park-IIGreater Noida201306India Institute for Skeletal Aging&Orthopedic Surgery Hallym University-Chuncheon Sacred Heart HospitalChuncheon-si24252Korea Department of Zoology Fakir Mohan UniversityVyasa ViharBalasore756020India Department of Biotechnology School of Life Science and BiotechnologyAdamas UniversityKolkata700126India

PPARγis a peroxisome proliferator-activated receptor(PPAR)family protein and is a target for type 2 diabetes(T2D).In this paper,we have performed a molecular docking analysis between ligand molecules(CID9816265,CID11608015,CID20251380,CID20251343,CID20556263,CID624491,CID42609928,and CID86287562)and PPARγto determine the ligand *** also helps to understand the ligand-binding domain(LBD)activity of PPARγduring the binding of the ***,a molecular dynamics simulation study was performed to determine the ligand biding stability in the PPARγ*** ligand specificity informed us about the potentiality of selecting a partial *** study also shows the binding conformation of Ceramicine B having hydrogen bonding affinity with a tricyclic polar head and stabilized theβ-sheet *** the other hand,the tricyclic polar head of nimbolide also formed hydrogen bonding(Ser342),but it shows a lesser degree of stabilization in theβ-sheet *** shows the binding conformation of partial agonist(PPARγ)in the Pocket-II of PPARγLBD,which has a significant role in stabilizing theβ-sheet *** might help to regulate ERK/Cdk5 mediated phosphorylation of *** study helps us understand the valid pose of a set of ligands confirmation and target protein conformation using docking and molecular dynamics *** in silico study will also help to initiate a drug discovery process of T2D.

关键词： PPARγ Partial agonist Molecular simulation T2D Drug discovery

Synthesis of silver nanoparticle with Colocasia esculenta(L.) stem and its larvicidal activity against Culex quinquefasciatus and Chironomus sp

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Asian Pacific Journal of Tropical Biomedicine 2019年第12期9卷 510-517页

作者： Arghadip Mondal Amita Hajra Wasim Akram Shaikh Sukalyan chakraborty Naba Kumar Mondal Environmental Chemistry Laboratory Department of Environmental ScienceThe University of Burdwan713104West BengalIndia Department of Civil&Environmental Engineering Birla Institute of TechnologyMesraJharkhandIndia

Objective:To synthesize silver nanoparticles with Colocasia esculenta as a reducing agent and to evaluate their effect against Culex quinquefasciatus and Chironomus ***:The aqueous extract of Colocasia esculenta stem was used for *** synthesized nanoparticles were characterized by UV-Vis spectrophotometry,Fourier-transform infrared spectroscopy,scanning electron microscope,transmission electron microscopy,energy-dispersive X-ray spectroscopy,X-ray diffraction and Zeta potential *** toxicity of Colocasia esculenta stem extract and the synthesized silver nanoparticles was evaluated against the larval stages of target human filarial vector Culex quinquefasciatus and non-target Chironomus ***:Scanning electron microscopy and transmission electron microscopy studies revealed almost spherical shape of the synthesized silver nanoparticles with size ranging from 13-50 *** 24 hours of exposure,the LC50 and LC90 of the plant extract against 4th instars larvae of Culex quinquefasciatus were 745.56 mg/L and 1258.28 mg/L,respectively,which were higher than those of synthesized silver nanoparticles(5.17 mg/L and 17.32 mg/L after 24 h;1.58 mg/L and 13.01 mg/L after 48 h).In addition,the LC50 and LC90 of silver nanoparticles against Chironomus *** 9.71 mg/L and 23.15 mg/L after 24 h as well as 2.38 mg/L and 19.49 mg/L after 48 h,***:The aqueous stem extract of Colocasia esculenta is a good agent for synthesis of silver nanoparticles,which are almost spherical with size less than 30 *** synthesized nanoparticles show good larvicidal activity without any harmful effect on non-target species.

关键词： Silver nanoparticles Colocasia esculenta Larvicidal Culex quinquefasciatus Mortality Chironomus sp

Evaluating Fertilization Effects on Soil Physical Properties Using a Soil Quality Index in an Intensive Rice-Wheat Cropping System

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Pedosphere 2016年第6期26卷 887-894页

作者： Bappa DAS Debashis chakraborty Vinod Kumar SINGH Mukhtar AHMED Amit Kumar SINGH Arijit BARMAN Division of Agricultural Physics Indian Agricultural Research InstituteNew Delhi 110012(India) Project Directorate for Farming Systems Research ModipuramMeerut 250110(India) Division of Soil Science and Agricultural Chemistry Indian Agricultural Research InstituteNew Delhi 110012(India)

Soil quality assessment has been suggested as an effective tool for evaluating sustainability of soil and crop management *** objective of this study was to develop a sensitive soil quality index(SQI) based on bulk density(BD),water-holding capacity(WHC),water-stable aggregates(WSA),aggregate mean weight diameter(AMWD),total organic C(TOC) and C input to evaluate the important rice-wheat cropping system on an Inceptisol in India.A long-term experiment has been conducted for 18 years at the Indian Council of Agricultural Research-Indian Institute of Farming Systems Research,Modipuram,*** treatments selected for this study were comprised of a no-fertilizer control and N,P and K fertilizers(NPK) combined with Zn and S fertilizers(NPK+ Zn+S),farmyard manure(NPK+FYM),green gram residues(NPK+GR) and cereal residues(NPK+CR),laid out in a randomized complete block design with three *** samples were collected and analyzed for BD,WHC,WSA and *** analysis revealed that both rice and wheat yields signi?cantly increased with the increases in AMWD,TOC and C input,but decreased with the increase in *** SQI values were then generated based on regression analysis of BD,WSA,AMWD,TOC and C input with rice and wheat yields for the 0–15 and 15–30 cm soil layers,*** analyses between crop yields and SQI values showed a quadratic type of relation with the coeffcient of determination(R^2) varying from 0.78 to *** regard to soil sustainability,applying crop residues to both rice and wheat could maintain soil quality for a longer period,whereas the highest yields of both the crops were recorded in the NPK+Zn+S *** regression equations developed in this study could be used to monitor soil quality in a subhumid tropical rice-wheat cropping system.

关键词： bulk density C input integrated nutrient management total organic C water-holding capacity water-stable aggregates

Intelligent algorithm for optimal meter placement and bus voltage estimation in ring main distribution system

在线全文

学校读者我要写书评

暂无评论

Frontiers in Energy 2012年第1期6卷 47-56页

作者： L.RAMESH N.chakraborty S.P.CHOWDHURY Electrical Engineering Department Jadavpur Universitykolkata 700032India Centre for Power Distribution Research Dr.MGRUniversityChermai 600095India Power Engineering Department Jadavpur Universitykolkata 700032India Electrical Engineering Department University ef Cape TownCape Town 7701South Africa

The advancement in power distribution system poses a great challenge to power engineering researchers on how to best monitor and estimate the state of the distribution network. This paper is exe,：uted in two stage processes. The first stage is to identify the optimal location for installation of monitoring instrument with minimal investment cost. The second stage is to estimate the bus voltage magnitude, where real time measurement is conducted and measured through identified meter location which is more essential for decision making in distribution supervisory control and data acquisition system （DSCADA）. The hybrid intelligent technique is applied to execute the above two algorithms. The algorithms are tested with institute of electrical and electronics engineers （IEEE） and Tamil Nadu electricity board （TNEB） bench- mark systems. The simulated results proves that the swarm tuned artificial neural network （ANN） estimator is best suited for accurate estimation of voltage with different noise levels.

关键词： artificial intelligence power distribution control state estimation

Role　of　Triad　Kinetic　Energy　Interactions　for　Maintenance　of　Upper　Tropospheric　Low　Frequency　Waves　during　Summer　Monsoon　　1988

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Advances in Atmospheric Sciences 1996年第1期13卷 91-102页

作者： D. R. chakraborty N. K. Agarwal Indian institute of Tropical Meteorology

In order to determine nonlinear energy exchanges into individual triad interactions in the frequency domain,spectral formulas are derived by use of the cross-spectral technique. First time attempt has been made to understandthe problem of maintenance of low frequency waves for tropical weather system by using this *** TOGAbasic level ill daily wind analyses on a 2.5 degree square grid around the global zone from 20°S-30°N at 200 hpa for92-day periods covering June, July and August of 1988 are used. Kinetic energy is gained at high frequencies and lostat low *** the planetary scale dynamics over tropics, barotropic nonlinear energy transfer plays a *** frequency wave of period 45 day loses maximum amount of energy when it interacted with frequencies ofperiods 92 day and 30 day.45 day cycle is also the main source of energy for other frequencies. Distrubances of periodl 5 day gain maximum amount of *** major contribution comes from the triad interaction of the frequencies.North of 20'N low frequency waves of period 30 to 92--day gain energy through nonlinear triadinteraction with the maximum gain at 22.5'N. The study may help to investigate the rapid loss of predictability of lowfrequency modes over tropics.

关键词： Cross spectral technique Low frequency mode

The 2019 novel coronavirus disease(COVID-19) pandemic: A zoonotic prospective

在线全文

学校读者我要写书评

暂无评论

Asian Pacific Journal of Tropical Medicine 2020年第6期13卷 242-246页

作者： Chiranjib chakraborty Ashish Ranjan Sharma Manojit Bhattacharya Garima Sharma Sang-Soo Lee Department of Biotechnology School of Life Science and BiotechnologyAdamas UniversityBarasat-Barrackpore RdKolkataWest Bengal 700126India Institute for Skeletal Aging&Orthopedic Surgery Hallym University-Chuncheon Sacred Heart HospitalChuncheon-si24252Gangwon-doRepublic of Korea Neuropsychopharmacology and Toxicology Program College of PharmacyKangwon National UniversityRepublic of Korea

Severe acute respiratory syndrome coronavirus 2(SARS-CoV-2),a novel coronavirus(CoV),has recently emerged as a significant pathogen for humans and the cause for the recent outbreak of the 2019 novel coronavirus disease(COVID-19)throughout the *** developing any preventive measure,an understanding of the zoonotic pattern for this virus is a *** should have a clear knowledge of its reservoir host,its distribution pattern and spreading *** about zoonotic reservoirs and its transmission among them can help to understand the COVID-19 *** this article,we discuss about the bats as the zoonotic reservoir of several CoV strains,co-existence of bats and CoV/viruses,the sequence similarity of SARS-CoV-2 with bat SARS-like CoV,the probable source of the origin of SARS-CoV-2 strain and COVID-19 outbreak,intermediate host of CoVs and SARS-CoV-2,human to human transmission and the possibility to maintain the zoonotic *** knowledge about the zoonotic reservoir of SARS-CoV-2 and its transmission ability may help develop the preventive measures and control for the future outbreak of CoV.

关键词： SARS-CoV-2 COVID-19 Coronavirus Zoonotic reservoir