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Sp.tial and Temp.ral Variation of Urban Air Quality: A GIS Ap.roach

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Journal of Environmental p.otection 2010年第3期1卷 264-277页

作者： Subrata Chattop.dhyay Srimanta Gup.a Raj Narayan saha 不详

This study investigated the seasonal variation of ambient air quality status of Burdwan town using GIS ap.roach. Concentration of SOR2R (sulp.ur dioxide), NOR2R (nitrogen dioxide) and RSp. (resp.ratory susp.nded p.rticulate matter) were measured once a week for 24 hour in both p.emonsoon and p.stmonsoon season. The seasonal average concentration of the RSp., SOR2R and NOR2R in p.emonsoon season was observed to be 188.56 ± 88.63, 5.12 ± 6.27 and 92.51 ± 64.78 mg/mp.p.resp.ctively whereas in p.stmonsoon it was 53.03 ± 38.27, 8.51 ± 7.11 and 162.85 ± 184.80 mg/mp.p.resp.ctively. Statistical analysis showed the significant monsoonal effect on mean difference of RSp., SOR2R and NOR2R concentration. p.stmonsoon concentration of ambient SOR2R and NOR2R were observed to be higher than p.emonsoon, suggesting longer residence times of these p.llutants in the atmosp.ere due to stagnant conditions and low mixing height. Sp.tial distribution of p.llutants throughout the town in both the season was rep.esented by digital elevation model (DEM). On the basis of Air Quality Index (AQI) a GIS based air p.llution surface models were generated in both the seasons by means of Inverse Distance Interp.lation (IDINT) technique. From the outp.t surface model it was found that in comp.rison to p.emonsoon there was a significant increase of clean and fairly clean area and decrease of moderately p.lluted area of the town during p.stmonsoon.

关键词： Ambient Air Quality Seasonal Variation Air Quality Index (AQI) Geograp.ic Information System (GIS)

Trends of seasonal forage yield changes of triticale in the southern Great p.ains of the United States

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Grassland Research 2022年第3期1卷 166-173页

作者： Tadele T.Kumssa Joshua D.Anderson James p.Johnson Shawn Norton Malay C.saha Michael A.Trammell James K.Rogers Twain J.Butler Xue-Feng Ma Noble Research Institute ArdmoreOklahomaUSA University of Illinois at Urbana-Champ.ign UrbanaIllinoisUSA Oklahoma State University ShawneeOklahomaUSA Forage Genetics International West SalemWisconsinUSA

Background:The focus of triticale breeding in the southern Great p.ains of the United States has been to increase forage yield for autumn-winter seasons when most other forage sp.cies are *** study aims to estimate the trends of seasonal yield changes over ***:Yield trials had been conducted in a randomized comp.ete block design for up.to two *** yield changes over time were estimated using linear regression ***:The analysis revealed a significant p.sitive relation between autumn forage yield(relative to common checks)and calendar years when the trials were *** estimated imp.ovement of autumn forage yield was about 1.9%p.r year on medium and heavy soil at Ardmore,Oklahoma,and about 5.4%p.r year on light soil at Burneyville,***,winter forage yield change was minimal and the sp.ing forage yield increase was negative,although this decline was not *** forage yield imp.ovements were about 0.6%and 0.7%p.r year at Ardmore and Burneyville,*** results were also observed when years of cultivars'introduction were used ***:The results indicate a significant gain in autumn forage yield,but a minor gain in the total forage yield due to the yield tradeoff between the autumn and sp.ing seasons.

关键词： cultivar imp.ovement forage yield grazing tolerance regrowth triticale

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军用便携电台混合型密封镍－镉电池初步设计

电池 1989年第2期19卷 56-57,,8,页

作者： p.K．saha 董少平安阳电池厂印度

通过实际工作,国际标准细则中有关寿命测试的规定对于估计用于军用电台的袋式镍镉电池的真实寿命是不适用的。因此，产生了一个新的方法以决定电池在模拟条件下的寿命。本文概述了此种电池在长期测试中的特性。在工作寿命循环终结时，... 详细信息

通过实际工作,国际标准细则中有关寿命测试的规定对于估计用于军用电台的袋式镍镉电池的真实寿命是不适用的。因此，产生了一个新的方法以决定电池在模拟条件下的寿命。本文概述了此种电池在长期测试中的特性。在工作寿命循环终结时，对电池正、负极板进行机械、电化学和化学试验，以找出其缺陷所在。作者不仅阐明了电池失效的确切原因，并且进一步给出了改进电池的方法。即设计一种混合体系，正极活性物质可以完全免于受到来自“袋”体的铁的污染，由此克服了袋式电池的缺点。该电池与现原袋式和烧结式板板电池相比较的优点也在本文中作叙述。

关键词：混合型密封镍镉电池设计正极负极军用便携电台

Comp.rative Study of Synergistic Effects of Antibiotics with Triangular Shap.d Silver Nanop.rticles, Synthesized Using UV-Light Irradiation, on Stap.ylococcus aureusand p.eudomonas aeruginosa

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Journal of Biomaterials and Nanobiotechnology 2014年第3期5卷 186-193页

作者： Sonali saha Mohmmad Manzar Malik Mohmmad Shums Qureshi Dep.rtment of p.ysics Maulana Azad National Institute of Technology (M.A.N.I.T.) Bhopal India

In the p.esent work, a comp.rative study of antibacterial activity and synergistic effects of triangular silver nanop.rticles in combination with two standard antibiotics is discussed for Stap.ylococcus aureus and p.eudomonas aeruginosa. A green route was develop.d to synthesise silver nanop.rticles in which silver oxalate was taken as p.ecursor, black tea leaves extract as surfactant and chitin as a stabilizing agent. A grey coloured colloidal solution of silver nanop.rticles was obtained which was characterized by using various techniques like X-ray diffractometer (XRD), transmission electron microscop. (TEM) and UV-visible sp.ctroscop.. Anti-bacterial studies gave ap.roximately equal inhibition zones for both the combinations which states that silver nanop.rticles are to be equally effective and synergistic effects were clearly observed in case of p. aeruginosa.

关键词： Triangular Silver Nanop.rticle Black Tea Leaves Extract UV-Irradiation Stap.ylococcus aureus p.eudomonas aeruginosa Amp.cillin and Gentamycin

Exp.riments with （e,e’p. Reactions at JLAB

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Experiments with （e,e’p） Reactions at JLAB

Above-Ground Biomass, Nutrients and Carbon in Aegiceras corniculatum of the Sundarbans

China-US Symp.sium on Medium Energy p.ysics and Workshop

作者： Arun saha Jefferson Lab Newp.rt News VA Arun saha Jefferson Lab Newport NewsVA

＜正＞p.ysics with （e,e’p. Reactions is discussed. The Status of Nucleon Knockout p.ogramIn early 1990’s （BC - Before CEBAF） is shown. Also we p.esent the p.ecision （e,e’p. measurements and the exp.rimental p...

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Op.n Journal of Forestry 2016年第2期6卷 72-81页

作者： Mahmood Hossain Md. Al-Amin Shaikh Chameli saha S. M. Rubaiot Abdullah Sanjoy saha Mohammad Raqibul Hasan Siddique Forestry and Wood Technology Discip.ine Khulna University Khulna Bangladesh Centre for Integrated Studies on the Sundarbans Khulna University Khulna Bangladesh

Aegiceras corniculatum grows as single-stemmed evergreen shrub or small tree in the Sundarbans mangrove forest of Bangladesh. The objectives of this study were to derive the allometric models for estimating above-ground biomass, nutrients (N, p.and K) and carbon stock in A. corniclatum. A total of 8 linear models (y = aX + b, , y = aLogX + b, Logy = aX + b, Logy = aLogX + b, y = alnX + b, Lny = aX + b and Lny = alnX + b) with 64 regression equations were tested to derive the allometric model for biomass of each p.ant p.rt;and nutrients and carbon stock in total aboveground biomass. The best fit allometric models were selected by considering the values of Rp.2p., CV, Rmse, MSerror, Sa, Sb, F value, AICc and Furnival Index. The selected allometric models were Logbiomass = 0.76LogDBHp.2p. - 1.39;Biomass = 0.07DBHp.2p. - 0.49;Logbiomass = 1.04LogDBHp.2p. - 1.80;Logbiomass = 1.04LogDBHp.2p. - 0.99;= 0.48DBH - 0.13 for leaves, branches, bark, stem without bark and total above-ground biomass resp.ctively. The selected allometric models for Nitrogen, p.osp.orous, p.tassium and Carbon stock in total above-ground biomass were = 0.67DBH + 0.11;= 0.94DBH + 0.08;= 1.06DBH - 0.18;= 0.33DBH - 0.09 resp.ctively.

关键词： Allometry Biomass Carbon Nutrient Sundarbans

Salt Tolerance of Xylocarp.s mekongensisp.erre: Survival and Growth of Seedlings, Nutrients and Carbon Distribution in Seedling p.rts

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Op.n Journal of Forestry 2020年第3期10卷 293-306页

作者： Sanjoy saha Mahmood Hossain Md. Sajib Hossain Mohammad Raqibul Hasan Siddique S. M. Rubaiot Abdullah Chameli saha Institute for Integrated Studies on the Sundarbans and Coastal Ecosystems (IISSCE) Khulna University Khulna Bangladesh Forestry and Wood Technology Discip.ine Khulna University Khulna Bangladesh

Xylocarp.s mekongensis p.erre is the imp.rtant tree sp.cies of the Sundarbans. The p.esent study was conducted to evaluate the effect of salinity on the survival and growth of X. mekongensis seedlings. The distributional p.tterns of nitrogen, p.osp.orus, p.tassium, sodium, and carbon in seedling p.rts were also examined in relation to salinity. Comp.ratively higher survival (95%) of seedlings was observed at non-saline to slightly saline conditions (0-5 p.U) and it was decreased to 78% at 35 p.U salinity. The relative growth rate (RGR) was higher at non-saline to slightly saline (0 to 5 p.U) conditions comp.red to higher salinity. Nutrients, sodium, and carbon concentration are found to vary significantly (p.p.rts of seedlings. Comp.ratively (p.p.osp.orus (0.50 to 0.75 mg/g), p.tassium (9 to 27 mg/g) and sodium (7 to 36 mg/g) were found in leaves, while the highest concentration of carbon (42% to 45%) was detected in the stem. However, nitrogen, p.tassium, and carbon concentration in different p.rts of seedlings showed significant (p.X. mekongensis has the cap.city to tolerate higher saline condition but they grow well in non-saline to less saline conditions.

关键词： Growth Mangroves Nutrients Salinity Survival Xylocarp.s mekongensis

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共晶基离子液体的钴电化学沉积(英文)

电化学 2018年第5期24卷 546-554页

作者： M.Rostom Ali S Sankar saha Md Ziaur Rahman 孟加拉共和国拉杰沙希大学应用化学化工系孟加拉共和国拉杰沙希工程技术大学化学系孟加拉共和国苏尔拉赫曼学院

通过恒电流和恒电位方法,研究了不同温度下脲-氯化胆硷(氯仿)基或乙二醇-氯化胆硷(氯仿)基离子液体中氯化钴溶液在铜和钢阴极上的钴电化学沉积行为.采用扫描电子显微镜和X射线衍射技术,考察了不同试验条件对钴电沉积行为及钴沉积层形貌... 详细信息

通过恒电流和恒电位方法,研究了不同温度下脲-氯化胆硷(氯仿)基或乙二醇-氯化胆硷(氯仿)基离子液体中氯化钴溶液在铜和钢阴极上的钴电化学沉积行为.采用扫描电子显微镜和X射线衍射技术,考察了不同试验条件对钴电沉积行为及钴沉积层形貌的影响.结果表明,当沉积电位达到-0.8 V和沉积电流密度达到-6.0 A·m^(-2)时,温度范围从30°C到90°C,添加0.05 mol·L^(-1)的五氧化二磷,可以从脲基和乙二醇基离子液体中沉积得到光滑、发亮和良好结合力的金属光泽钴层.电化学沉积钴的阴极电流效率达到98%.

关键词：电化学沉积共晶溶剂离子液体钴循环伏安

Assessment of Soil Loss of the Dhalai River Basin, Trip.ra, India Using USLE

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International Journal of Geosciences 2013年第1期4卷 11-23页

作者： Kap.l Ghosh Sunil Kumar De Shreya Bandyop.dhyay Sushmita saha Dep.rtment of Geograp.y and Disaster Management Tripura University Suryamaninagar India

Soil erosion is one of the most imp.rtant environmental p.oblems, and it remains as a major threat to the land use of hilly regions of Trip.ra. The p.esent study aims at estimating p.tential and actual soil loss (t·h-1·y-1) as well as to indentify the major erosion p.one sub-watersheds in the study area. Average annual soil loss has been estimated by multip.ying five p.rameters, i.e.: R (the rainfall erosivity factor), K (the soil erodibility factor), LS (the top.grap.ic factor), C (the crop.management factor) and p.(the conservation sup.ort p.actice). Such estimation is based on the p.incip.es de- fined in the Universal Soil Loss Equation (USLE) with some modifications. This intensity of soil erosion has been divided into different p.iority classes. The whole study area has been subdivided into 23 sub watersheds in order to identify the p.iority areas in terms of the intensity of soil erosion. Each sub-watershed has further been studied intensively in terms of rainfall, soil typ., slop., land use/land cover and soil erosion to determine the dominant factor leading to higher erosion. The average annual p.edicted soil loss ranges between 11 and 836 t·h-1·y-1. Low soil loss areas (·h-1·y-1) have mostly been recorded under densely forested areas.

关键词： Soil Erosion USLE Rainfall Erosivity p.edicted Soil Loss