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Densities, Ultrasonic Speeds, Viscosities and Refractive Indices of Binary Mixtures of Benzene with Benzyl Alcohol,Benzonitrile, Benzoyl chloride and chlorobenzene at 303.15 K

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chinese journal of chemistry 2005年第4期23卷 377-385页

作者： ALI,A. pandey,j.D. SONI,N.K. NAIN,A.K. LAL,B. cHAND,D. Departmentofchemistry JamiaMilliaIslamia(CentralUniversity)NewDelhi110025India Departmentofchemistry UniversityofAllahabadAllahabad211002U.P.India

Densities, ρ, ultrasonic speeds, u , viscosities, η , and refractive indices, n , of pure benzene, benzyl alcohol (BA), benzonitrile (BN), benzoyl chloride (Bc), chlorobenzene (cB) and their thirty six binary mixtures, with benzene as common component, were measured at 303.15 K over the entire mole fraction range. From these experimental data the values of deviations in ultrasonic speed, Δ u , isentropic compressibility, Δk s , excess acoustic impedance, Z E , deviation in viscosity, Δη, and excess Gibbs free energy of activation of viscous flow, G *E , and partial molar isentropic compressibility, of BA, BN, Bc and cB in benzene were computed. The variation of these derived functions with composition of the mixtures suggested the increased cohesion (molecular order) in the solution and that interaction (A‐B)>(A‐A) or (B‐B). Moreover, theoretical prediction of ultrasonic speed, viscosity and refractive index of all the four binary mixtures was made on the basis of empirical and semi‐empirical relations by using the experimental values of the pure components. comparison of theoretical results with the experimental values was made in order to assess the suitability of these relations in reproducing the experimental values of u , η and n . Also, molecular radii of pure liquids and the average molecular radii of binary mixtures were evaluated using the corresponding refractive indices of pure liquids and binary mixtures. The average molecular radii of binary mixtures were found to be additive with respect to mole fraction of the pure component.

关键词： binary mixture excess function density ultrasonic speed viscosity refractive index

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Fuelwood assessment at the micro-watershed level:a case study in Garhwal Himalaya,India

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chinese journal of Population,Resources and Environment 2015年第2期13卷 177-186页

作者： Y.S.c.Khuman Nancy Raina Ranjita pandey K.S.Rao School of Agriculture Indira Gandhi National Open University Department of Botany University of Delhi Department of Statistics University of Delhi

Biomass,as fuelwood,is one of the major sources of energy in rural areas,especially in the mountainous regions of the *** the increasing human population exerts more pressure on the forest thereby inducing an adverse effect on the sustainability of the ecosystem,which consequently causes fuelwood crisis at a local level,this crisis is spatio-temporal in ***,the major objective of this study is to assess the sustainability of fuelwood at different probable scenarios at a micro watershed *** present study was conducted in the Phakot watershed,the Tehri Garhwal district of central Himalaya in India,during *** on the vegetation composition in the study area,the net primary productivity(NPP)value of the Oak forest,and mixed oak and sal forests,was used for the quantification of fuelwood availability in evergreen and deciduous forests,*** fuelwood demand was calculated on the basis of seasonal fuelwood consumption *** probable permutations for availability-demand scenarios assuming the existence of high(H),low(L)and average(A)conditions were analyzed for evaluating the *** available annual harvestable fuelwood in the watershed is in the minimum and maximum ranges of 2283.28 to 4066.00 tons,respectively,per year whereas it has a demand of 110.76 tons as the minimum to 3659 tons as the maximum *** shows that in the current availabilitydemand scenario,the watershed does not have fuelwood crisis in the present situation but needs to maintain the sustainability of the *** on our study,it is concluded that,globally,more spatio-temporal study is required to understand the issues at the local level.

关键词： watershed fuelwood assessment biomass stress sustainability

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comparative study of green peas using with blanching & without blanching techniques

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Information Processing in Agriculture 2019年第2期6卷 285-296页

作者： Om Prakash pandey Bimal Kumar Mishra Ashok Misra Department of Mechanical Engineering Birla Institute of TechnologyMesraRanchiIndia Department of Mathematics Birla Institute of TechnologyMesraRanchiIndia

This paper attempts to analyze the kinetics involved in the drying of green peas in‘with blanching’and‘without blanching’*** by hot water mixed with a solution of citric acid(0.1–0.2 mg/ml)at 70c–100c is the treatment provided to the samples of green *** analysis shows that the moisture content in green peas of three different sizes is reduced at different temperatures and demonstrates the effect of the rate of drying of the moisture *** different diameters and temperatures,the parameters are analyzed using‘with blanching’and‘without blanching’*** is observed that‘with blanching’process plays a significant role in the reduction of moisture content under different temperatures and diameters in a lesser time as compared to‘without blanching’.The operative activation energy and moisture diffusivity are described by using Fick’s law of *** calculation of effective moisture diffusivity can be done via the utilization of *** drying data is subjected to two models of mathematical nature:Simple Exponential model,and Page *** performance of these models is examined by means of comparing the coefficient of determination(R2),chi-square(v2)and root mean square error(RMSE)between the experimental and forecasted value of moisture ratio obtained‘with blanching’and‘without blanching’.The experimental data was seen to be in accordance with the Page *** comparisons of energy consumption,energy efficiency and also the cost of the drying processes for‘with blanching’and‘without blanching’have been accomplished to optimize and reduce process condition and the cost of the process,respectively.

关键词： Hot air drying Green peas Drying kinetics Blanching Fluidized bed dryer

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Polymer optimization for the development of low-cost moisture sensor based on nanoporous alumina thin film

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journal of Advanced ceramics 2013年第4期2卷 341-346页

作者： Manju pandey Prabhash MISHRA Debdulal SAHA S.S.ISLAM Nano-Sensor Research Laboratory F/O Engineering and TechnologyJamia Millia Islamia(Central University)New DelhiIndia Sensors and Actuators Division Central Glass&Ceramic Research Institute196 Raja S.C.Mullick RoadKolkata 700032India

Sol-gel processed alumina(Al_(2)O_(3))thin film has been investigated for sensing *** sensor was based on ordered nanoporous Al_(2)O_(3)thin film,which consisted of gold electrodes on both sides of the film forming parallel plate *** substrate was used for supporting thin film moisture *** was achieved by controlling the surface energy of the substrate and polymer(polyvinyl alcohol(PVA))optimization was done for developing rigid thin film over it.A high change in capacitance was observed as the moisture level increased from 5 ppmV to 500 *** electron microscopy(SEM)results revealed that pores were distributed uniformly throughout the sample,which enhanced the adsorption of water molecule over the film.X-ray diffraction(XRD)study clearly confirmed the gamma(γ)phase of alumina thin *** was found that the sensitivity of our sensor was suitable for commercial application.

关键词： sol-gel dip-coating polyvinyl alcohol(PVA) nanoporous hydrophilicity moisture sensor

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Recent advances in assessment of soil erosion vulnerability in a watershed

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International Soil and Water conservation Research 2021年第3期9卷 305-318页

作者： Shachi pandey Parmanand Kumar Miodrag Zlatic Raman Nautiyal Vijender Pal Panwar Forest Ecology and climate change Division Forest Research InstituteDehradunIndia Faculty of Forestry Belgrade UniversityBelgradeSerbia Indian council of Forestry Research and Education India

Soil erosion is one of the most critical hazards adversely affecting both environment and *** of the annual soil erosion rate provides information on soil erosion risk zones indicating the areas with high,severe and low *** and prediction of soil erosion has a long history of more than seven *** becomes imperative to be familiar with the quantum of studies conducted and methods employed across the world to assess vulnerability of ecosystems to soil erosion to plan strategies for their *** are several methods based on various factors like land use,soil quality,topography *** to assess the susceptibility of a region to soil *** time the gap in understanding of such models and their use around the world has *** models for assessing soil erosion exist but there is a lack of knowledge on spatial distribution of the methods being *** papers related to assessment of soil erosion vulnerability published during the past three decades(1991—2019)were *** 160 studies were reviewed to understand advances in the methods used to assess soil erosion vulnerability worldwide,identification of the most popular methods and proportion of studies conducted in the fragile region of *** results show that 18 different methods have mainly been used to assess soil erosion risk in different *** methods include statistical,physical,process based and empirical *** use of few physical methods like ANSWERS and SHE has decreased with time while that of physical and process methods like RUSLE,SWAT,WEPP and PESERA has increased with *** review highlighted that various models being used worldwide are based on their suitability to the *** also brings to attention that few models like PESERA,EUROSEM and WEPP are mostly being used concentrated in a particular *** like PESERA and EPM are mostly used in European region and may be encouraged to estimate soil er

关键词： Soil erosion vulnerability RUSLE McDM

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Unravelling the bottleneck of phosphonic acid anchoring groups aiming toward enhancing the stability and efficiency of mesoscopic solar cells

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Frontiers of chemical Science and Engineering 2022年第7期16卷 1060-1078页

作者： Ajendra Kumar Vats Pritha Roy Linjun Tang Shuzi Hayase Shyam S.pandey Graduate School of Life Science and Systems Engineering Kyushu Institute of TechnologyKitakyushu 808-0196Japan i-Powered Energy System Research center(i-PERc) The University of Electro-CommunicationsTokyo 182-8585Japan

Novel near-infrared sensitizers with different anchoring groups aiming toward improved stability and efficiency of dye-sensitized solar cells were synthesized. Adsorption of these dyes on the mesoporous TiO_(2) surface revealed the dye adsorption rate of –cH=cH–cOOH (SQ-139)>–cH=c(cN)cOOH (SQ-140)>–PO_(3)H_(2) (SQ-143)>–cH=c(cN)PO_(3)H_(2) (SQ-148)>–cH=c(cN)PO_(3)H–c_(2)H_(5) (SQ-157)>–PO_(3)H–c_(2)H_(5) (SQ-151)> –cH=cH–cOOH(–PO_(3)H_(2)) (SQ-162). The binding strength of these dyes on mesoporous TiO_(2) as investigated by dye desorption studies follows SQ-162>SQ-143>SQ-148>SQ-139≫SQ-157~SQ-151≫SQ-140 order. The acrylic acid anchoring group was demonstrated to be an optimum functional group owing to its fast dye adsorption rate and better binding strength on TiO_(2) along with good photoconversion efficiency. Results of dye binding on TiO_(2) surface demonstrated that SQ-162 bearing double anchoring groups of phosphonic and acrylic acid exhibited>550 times stronger binding as compared to dye SQ-140 having cyanoacrylic acid anchoring group. SQ-140 exhibited the best photovoltaic performance with photon harvesting mainly in the far-red to near-infrared wavelength region having short circuit current density, open-circuit voltage and fill factor of 14.28 mA·cm^(–2), 0.64 V and 0.65, respectively, giving the power conversion efficiency of 5.95%. Thus, dye SQ-162 not only solved the problem of very poor efficiency of dye bearing only phosphonic acid while maintaining the extremely high binding strength opening the path for the design and development of novel near-infrared dyes with improved efficiency and stability by further increasing the π-conjugation.

关键词： anchoring groups adsorption behaviour dye-binding strength squaraine dyes dye-sensitized solar cells

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Recent Achievements in Developing Low Temperature and High Strain Rate Superplastic Materials

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journal of Materials Science & Technology 2001年第1期17卷 19-20页

作者： j.c Huang Inst.Materials Science and Engineering Sun Yat-Son UniversityKaohsiungTaiwan 804China

This paper is to briefly outline our recent activities in developing low temperature or high strain rate superplastic materials, including aircraft-used and general-purpose Al- and Mg-base alloys or composites. as well as Ti3AI base intermetallic alloys. The processing routes applied included the thermomechanical treatment, equal channel angular pressing and other extrusion or forging methods.

关键词： High Strain Rate thermomechanical treatment intermetallic alloys processing routes high strain rate low temperature

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Gas Line Pressure Fluctuation Analysis of a Gas-Liquid Reactor

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journal of Thermal Science 2005年第3期14卷 267-271页

作者： j.j.j. cHEN j.c. ZHAO chemical & Materials Engineering Department The University of Auckland Private Bag 92019 Auckland New Zealand ProfessorChemical & Materials Engineering Department The University of Auckland Private Bag 92019 Auckland New Zealand

To ensure efficient operation of metallurgical gas-liquid reactors, the gas bubbles must be uniformly distributed. For high temperature metallurgical reactors, it is impractical and unsafe to carry out visual observations. An air-water model was used to study the relationship between the bubble flow patterns and the pressure fluctuation signals. The fluctuation signals captured in the time domain were transformed into the frequency domain. Various parameters obtained from the transformed data were analysed for their suitability for delineating the bubble flow patterns observed. These parameters and the flow patterns were found to be well-correlated using the gas flow number.

关键词： gas liquid reactors bubble distribution signal analysis

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A possible therapeutic potential of quercetin through inhibition of μ-calpain in hypoxia induced neuronal injury:a molecular dynamics simulation study

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Neural Regeneration Research 2016年第8期11卷 1247-1253页

作者： Anand Kumar pandey Swet chand Shukla Pallab Bhattacharya Ranjana Patnaik School of Biomedical Engineering Indian Institute of TechnologyBanaras Hindu University School of Biochemical Engineering Indian Institute of TechnologyBanaras Hindu University Department of Neurology Leonard M.Miller School of MedicineUniversity of Miami

The neuroprotective property of quercetin is well reported against hypoxia and ischemia in past *** property of quercetin lies in its antioxidant property with blood-brain barrier permeability and anti-inflammatory capabilities.μ-calpain,a calcium ion activated intracellular cysteine protease causes serious cellular insult,leading to cell death in various pathological conditions including hypoxia and ischemic ***,it may be considered as a potential drug target for the treatment of hypoxia induced neuronal *** the inhibitory property of μ-calpain is yet to be explored in details,hence,in the present study,we investigated the interaction of quercetin with μ-calpain through a molecular dynamics simulation study as a tool through clarifying the molecular mechanism of such inhibition and determining the probable sites and modes of quercetin interaction with the μ-calpain catalytic *** addition,we also investigated the structure-activity relationship of quercetin with μ-*** binding of quercetin with μ-calpain had a value of –28.73 k j/mol and a Ki value of 35.87 μM that may be a probable reason to lead to altered functioning of μ-***,quercetin was found to be an inhibitor of μ-calpain which might have a possible therapeutic role in hypoxic injury.

关键词： nerve regeneration quercetin μ-calpain molecular docking molecular dynamics simulation hypoxia neuroprotection neural regeneration

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Spatio-temporal variation of depth to groundwater level and its driving factors in arid and semi-arid regions of India

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Regional Sustainability 2024年第2期5卷 103-122页

作者： Suchitra pandey Geetilaxmi MOHAPATRA Rahul ARORA Department of Economics and Finance Birla Institute of Technology&SciencePilani333031India

climate change and increasing anthropogenic activities,such as over-exploitation of groundwater,are exerting unavoidable stress on groundwater *** study investigated the spatio-temporal variation of depth to groundwater level(DGWL)and the impacts of climatic(precipitation,maximum temperature,and minimum temperature)and anthropogenic(gross district product(GDP),population,and net irrigated area(NIA))variables on DGWL during *** study considered DGWL in 113 observation wells and piezometers located in arid western plains(Barmer and jodhpur districts)and semi-arid eastern plains(jaipur,Ajmer,Dausa,and Tonk districts)of Rajasthan State,*** methods were employed to examine the annual and seasonal patterns of DGWL,and the generalized additive model(GAM)was used to determine the impacts of climatic and anthropogenic variables on *** 1994-2020,except for Barmer District,where the mean annual DGWL was almost constant(around 26.50 m),all other districts exhibited increase in DGWL,with Ajmer District experiencing the most *** results also revealed that 36 observation wells and piezometers showed a statistically significant annual increasing trend in DGWL and 34 observation wells and piezometers exhibited a statistically significant decreasing trend in ***,32 observation wells and piezometers showed an statistically significant increasing trend and 37 observation wells and piezometers showed a statistically significant decreasing trend in winter;33 observation wells and piezometers indicated a statistically significant increasing trend and 34 had a statistically significant decreasing trend in post-monsoon;35 observation wells and piezometers exhibited a statistically significant increasing trend and 32 observation wells and piezometers showed a statistically significant decreasing trend in pre-monsoon;and 36 observation wells and piezometers reflected a statistically significant increasing trend and 30 observation

关键词： climate change Generalized additive model(GAM) Depth to groundwater level(DGWL) climatic and anthropogenic variables Arid and semi-arid regions

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