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| 1 | Sorption and Fractionation of a Peat Derived Humic Acid by Kaolinite, Montmorillonite, and Goethite显示文摘Sorption of humic acid (HA) on mineral surfaces has a profound interest regarding the fate of hydrophobic organic contaminants (HOCs) and carbon sequestration in soils. The objective of our study is to determine the fractionation behavior of HA upon sorption on mineral surfaces with varying surface properties. HA was coated sequentially on kaolinite (1:1 clay), montmorillonite (2:1 clay), and goethite (iron oxide) for four times. The unadsorbed HA fractions were characterized by elemental analysis, diffuse reflectance infrared Fourier transform spectroscopy (DRIFT), and solid state 13C nuclear magnetic resonance spectroscopy (NMR). The mineral-HA complexes were characterized by DRIFT. Polarity index [(N+O)/C] revealed higher polarity of the unadsorbed HA fractions after coating on kaolinite, reflecting that relatively higher polarity fractions of HA remain unadsorbed. Sorption of aliphatic alcohol fraction along with carbohydrate was prominent on kaolinite surface. DRIFT results of the unadsorbed HA fractions indicated more sorption of aliphatic moieties on both kaolinite and montmorillonite. DRIFT results of the unadsorbed HA fractions after sorption on kaolinite and goethite showed the sorption of the proteinaceous fractions of HA. The HA fractions obtained after coating on goethite showed significant sorption of carboxylic moieties. The results mentioned above comply reasonably well with the DRIFT spectra of the mineral-HA complexes. 13C NMR results showed higher sorption of anomeric C on kaolinite surface. Higher sorption of paraffinic fraction was observed on montmorillonite. NMR data inferred the sorption of carboxylic moieties on goethite surface. Overall, this study showed that aliphatic moieties of HA preferentially sorbed on kaolinite and montmorillonite, while carboxylic functional groups play a significant role in sorption of HA on goethite. The sorbed fractions of HA may modify the mineral surface properties, and thus, the interaction with organic contaminants. | S. GHOSH WANG Zhen-Yu S. KANG P. C. BHOWMIK B. S. XING | 2009 | Pedosphere2009，19，1： | 9 |
| 2 | 香蕉组织培养过程中内生菌污染的控制(英文)显示文摘研究了体外培养一种孟加拉传统香蕉(Musa spp.Cv.Kanthali)的茎尖组织。茎尖的原始细胞表面经无菌处理(0.1%HgCl2处理12min),接种6~15d后外植体地下茎部分仍有微生物污染(大部分是细菌),杀死了85%的外植体。为确定无污染培养基,将等量外植体分别浸泡在舍400mg/L氨苄青霉素和200mg/L庆大霉素(两种光谱抗生素)的培养基中1h。结果表明,经抗生素处理的外植体完全没有污染,但培养3周后不能再生。进行二次继代培养后,其中一部分外植体吸收了培养基并胀大,颜色由苍白转变成浅绿或深绿。三次继代培养后数天,不再观察到外植体的生长,所有经抗生素处理过的外植体都开始死亡。在未经抗生素处理的活外植体中,单个茎发育的最佳培养基是:Ms+4.0mg/LBA+0.5mg/L KT+15%CW,平均生长时间为18~21d,但再生率很低,只有30%。茎细胞增殖的最佳培养基是:MS+4.0mg/L BA+2.0mg/L IAA+15%CW,每个茎平均只萌发3~4个芽。最后,在添加0.5mg/L IBA的一半浓度的MS培养基中,体外培养茎最大生根率达到90%。 | Soubir Titov Salil Kumar Bhowmik Md.Sadrul Alam Sarder Nasir Uddin | 2007 | 生物工程学报2007，23，6： | 6 |
| 3 | Return and Volatility Spillovers Effects:Study of Asian Emerging Stock Markets显示文摘This paper examines the extent of contagion and interdependence across the six Asian emerging countries stock markets(e.g., Bangladesh, China, India, Malaysia, the Philippine, and South Korea) and then try to quantify the extent of the Asian emerging market fluctuations which are described by intra-regional contagion effect. These markets experienced both fast growth and key upheaval during the sample period, and thus, provide potentially rich information on the nature of border market interactions. Using the daily stock market index data from January 2002 to December 2016(breaking the 15 years data set into three sub periods; pre-crisis, crisis, and post crisis periods);particularly make attention to the global financial crisis of 2007~2008. The return and volatility spillovers are modeled through the GARCH(generalized autoregressive conditional heteroscedasticity),pairwise Granger causality tests, and the forecast error variance decomposition in a generalized VAR(vector auto regression) models. This paper shows that volatility and return spillovers behave very differently over time, during the pre-crisis, crisis, and post crisis periods. Importantly, Asian emerging stock markets interaction is less before the global financial crisis period. The return and volatility spillover indices touch their respective historical peaks during the global financial crisis 2007~2008,however Bangladeshi market faces this condition in 2009~2010. | Bhowmik RONI Ghulam ABBAS Shouyang WANG | 2018 | Journal of Systems Science and Information2018，9，2： | 6 |
| 4 | 二硼化钛对Al2024−TiB_(2)非原位复合材料摩擦磨损性能的影响显示文摘用搅拌铸造法制备不同质量分数二硼化钛(TiB_(2))颗粒增强的铝基复合材料,并研究其摩擦磨损性能。采用销−盘式摩擦试验机对Al2024−TiB_(2)复合材料进行干滑动磨损试验。为了研究摩擦学参数对复合材料的影响,对载荷、滑动距离和滑动速度等参数进行调整。显微组织表征结果表明,TiB_(2)颗粒分散均匀并与基体有良好的结合。实验结果表明,与Al2024合金相比,复合材料的摩擦磨损率更低,而Al2024合金和复合材料的磨损率均随载荷、滑动速度和滑动距离的增加而增加。然而,Al2024合金和复合材料的摩擦因数均随载荷的增大而减小,而随滑动速度和滑动距离的增大而增大。对磨损表面和磨屑的扫描电镜研究表明,耐磨性的提高归因于细小磨屑的形成。 | Dipankar DEY Abhijit BHOWMIK Ajay BISWAS | 2021 | Transactions of Nonferrous Metals Society of China2021，31，5： | 4 |
| 5 | Predictors of mortality among HIV-infected patients initiating anti retroviral therapy at a tertiary care hospital in Eastern India显示文摘Objective:To assess early mortality and identify its predictors among the ART naive HIV-infected patients initiating anti retroviral therapy(ART) available free of cost at the ART Centres. Methods:A retrospective cohort analysis of routinely collected programme data was done for assessing mortality of all ART naive adult patients who received first-line ART at a government tertiary care hospital in eastern India during 1st March 2009 and 28th February 2010.Bivariate and multiple regression analyses of the baseline demographic,clinical and laboratory records using SPSS 15.0 were done to identify independent predictors of mortality.Results:The mortality rate at one year was estimated to be 7.66(95%CI 5.84-9.83) deaths/100 patient-years and more than 50%of the deaths occurred during first three months of ART initiation with a median time interval of 73 days.Tuberculosis was the major cause of death.ART naive patients with baseline serum albumin <3.5 mg/dL were eight(OR 7.9;95%CI:3.8-16.5) at risk of death than those with higher serum albumin levels and patients with CD4 count <I00 cells/μL were two times(OR 2.2; 95%CI:1.1-4.4) at risk of death compared to higher CD4 counts.Conclusions:Risk of mortality is increased when ART is initiated at advanced stages of immunosuppression denoted by low serum albumin levels and CD4 cell counts.This highlights the importance of early detection of HIV infection,early management of opportunistic infections including tuberculosis and timely initiation of the antiretroviral drugs in the resource-limited countries,now available free in the Indian national ART programme. | Ananya Bhowmik Subhasis Bhandari Rajyasree De Subhasish Kamal Guha | 2012 | Asian Pacific Journal of Tropical Medicine2012，5，12： | 3 |
| 6 | Load shedding strategy coordinated with storage device and D-STATCOM to enhance the microgrid stability显示文摘Recently microgrids have drawn a potential attraction by fulfilling the environmental demands and the increasing energy demands of the end-users. It is necessary to focus on various protection and control aspects of a microgrid. During the transition between the grid-following and grid-forming modes, the voltage and the frequency instability due to the power mismatch condition becomes the major point of concern. Therefore, the paper executes a frequency-active power and voltage-reactive power drooping control strategy for the precise power-sharing among the distributed power generators. Furthermore, to handle the power deficit scenarios and to maintain the system stability, a system independent and priority-based adaptive three-stage load shedding strategy is proposed. The sensitivity of the strategy depends on the system inertia and is computed according to the varying absolute rate-of-change-of-frequency. The strategy incorporates the operation of battery storage system and distributed static compensator (D-STATCOM) in the microgrid, to provide a reliable power supply to the customers for a considerable time instead of a sudden load shedding. The effectiveness of the proposed strategies is investigated on a scaled-down modified IEEE 13-bus microgrid system on the podium of MATLAB 2015b through the time-domain simulation. | Sheetal Chandak Pritam Bhowmik Pravat Kumar Rout | 2019 | Protection and Control of Modern Power Systems2019，4，1： | 3 |
| 7 | DEVELOPMENT OF NWP BASED OBJECTIVE CYCLONE PREDICTION SYSTEM(CPS) FOR NORTH INDIAN OCEAN TROPICAL CYCLONES——EVALUATION OF PERFORMANCE显示文摘An objective NWP based Cyclone Prediction System(CPS) has been developed and implemented at IMD for operational cyclone forecasting over the north Indian Ocean(NIO). The five forecast components of CPS are(a) Genesis Potential Parameter(GPP),(b) Multi-Model Ensemble(MME) technique for track prediction,(c) Statistical Cyclone Intensity Prediction(SCIP),(d) rapid intensification and(e) decay model to forecast intensity after the landfall.Verification shows GPP had higher probability of detection(0.98) and lower false alarm ratio(0.27) with higher critical success index(0.72). Mean track error of MME ranged from 74 km at 12 h to 200 km at 72 h and reduced by 27% to 52% for 36 h to 72 h forecast during 2009-2013. The mean forecast errors of landfall position ranged from 56 km at 24 h to 137 km at 72 h and landfall time error ranged from 3.6 h at 24 h to 6.1 h at 72 h. Mean intensity errors of SCIP ranged from 5.4 kt at 12 h to 16.9 kt at 72 h. The probabilistic rapid intensification forecast was skillful compared to climatology. The 6-hourly decaying intensity(after landfall) errors ranged from 3 kt to 4.9 kt. Results demonstrate the potential of CPS for operational cyclone forecast over the NIO. | S.D.KOTAL S.K.BHATTACHARYA S.K.ROY BHOWMIK | 2014 | Tropical Cyclone Research and Review2014，3，3： | 2 |
| 8 | Phenolic-linked variation in strawberry cultivars for potential dietary management of hyperglycemia and related complications of hypertension显示文摘 | Susan Cheplick Young-In Kwon Prasanta Bhowmik Kalidas Shetty | 2009 | Bioresource Technology2009，，1： | 2 |
| 9 | lpxA/lpxC/lpxD基因突变致鲍曼不动杆菌耐多黏菌素作用机制显示文摘目的探讨细胞膜脂质A生物合成基因lpxA/lpxC/lpxD突变导致鲍曼不动杆菌临床株对多黏菌素耐药的机制。方法用透射电子显微镜(TEM)观察细菌细胞壁、细胞内外膜的变化;用气相色谱(GC)法定量测定脂肪酸含量观察脂多糖(LPS)的变化。此外,用分子生物学方法确定菌株编码细胞膜脂质生物合成的lpxA/lpxC/lpxD基因突变。结果 TEM显示多黏菌素耐药鲍曼不动杆菌细胞外膜和内膜完整性降低,失去细胞壁膜间隙的均一性。GC结果表明短碳链饱和脂肪酸和脂肪酸醇有下降趋势,且几乎失去了所有的未知脂肪酸,但长碳链饱和、不饱和脂肪酸和脂肪酸醇的量都增加了。参与细胞膜脂质生物合成的lpx、lpxC和lpxD基因发现有缺失、点突变和插入等改变。结论多黏菌素耐药鲍曼不动杆菌存在lpxA/lpxC/lpxD基因突变及细胞内外膜改变。 | 张文利 Joan-Miquel Balada-Llasat Vijay Pancholi Bhowmik Aurosree Bhavani Gopalakrishnan Preeti Pancholi | 2015 | 中国感染与化疗杂志2015，15，6： | 2 |
| 10 | Influence of peach(Prunus persica Batsch)phenological stage on the short-term changes in oxidizable and labile pools of soil organic carbon and activities of carbon-cycle enzymes in the North-Western Himalayas显示文摘The labile organic carbon(C)and C-related enzymes are sensitive indicators capturing alterations of soil organic matter(SOM),even in a short-time scale.Although the effects of crop husbandry and land use change on these attributes have been well studied,there is no consensus about how plant phenology may impact them.This study aimed to determine the short-term effect o f six distinct phenological stages(PS-1:full bloom;PS-2:fruit set;PS-3:pit hardening;PS-4:physiological maturity;PS-5:60 d after physiological maturity;and PS-6:fall)o f peach on the changes in soil organic carbon(SOC)fractions of different oxidizability,labile C pools,and C-cycle enzyme activities in soils,for two consecutive years(2015 and 2016)in the North-Western Himalayas(NWH).Peach rhizosphere soils were sampled at the topsoil(0-15 cm)and subsoil(16-30 cm)layers,along with rhizosphere soils from adjacent perennial grasses,which served as a control.Values for most of the assessed parameters,including very labile C,labile C,microbial biomass C,permanganate oxidizable C,dissolved organic C,mineralizable C,amylase activity,and carboxymethyl-cellulase activity,were significantly(P<0.05)higher at PS-3 than at other phenological stages of peach.Conversely,a sudden decline in these soil variables was recorded at PS-5,followed by a slight buildup at PS-6,particularly in the topsoil of the peach orchard.Short-term changes in organic C fractions of different oxidizability,influenced by peach phenological stage,significantly(P<0.05)affected C management index,C pool index,and lability index.Both the C management index and lability index showed their highest values at PS-3 and their lowest values at PS-5,clearly indicating short-term accretion and depletion of SOC,in tandem with the peach phenological events.Principal component analysis suggested that a composite of soil indicators,including microbial biomass C,dissolved organic C,amylase,and invertase,could help detect short-term changes in SOC content.It is concluded that peach phenological events had a major impact on the short-term variations of the studied soil variables,which could be attributed to changes in the above-and belowground plant residues,as well as the extent of nutrients and water acquisition. | Sovan DEBNATH Brij Lai ATTRI Anil KUMAR Arun KISHOR Raj NARAYAN Kanchan SINHA Arpan BHOWMIK Anil SHARMA Desh Beer SINGH | 2020 | Pedosphere2020，30，5： | 2 |
| 11 | A Study on the Volatility of the Bangladesh Stock Market--Based on GARCH Type Models显示文摘The generalized autoregressive conditional heteroskedasticity(GARCH) type models are used to investigate the volatility of Bangladesh stock market. The findings of the study demonstrate that the index volatility characteristics changes over time. The article shows that the data are divided into three sub-periods: pre crisis, crisis, and post crisis. Accordingly, the results of the findings indicate changes in the GARCH-type models parameter, risk premium and persistence of volatility in different periods. A significant 'low-yield associated with high-risk' phenomenon is detected in the crisis period and the 'leverage effect' occurs in each periods. The investors are irrational which is based on assumption of risk and return characteristics of assets. Consequently, the market is not as mature as developed market. It is found in the article that the threshold generalized autoregressive conditional heteroskedasticity(TGARCH) model is more accurate for the model accuracy. Additionally, statistic error measurements indicate that GARCH model is more efficient than others and it has also more forecasting ability. | Bhowmik RONI Chao WU Roy Kumar JEWEL Shouyang WANG | 2017 | Journal of Systems Science and Information2017，8，3： | 2 |
| 12 | Relation of sputum inflammatory markers to symptoms and lung function changes in COPD exacerbations 显示文摘 | Bhowmik A Seemungal TA Sapsford R J | 2000 | Thorax2000，55，2： | 1 |
| 13 | Relationship between exacerbation frequency and lung function decline in chronic obstructive pulmonary disease 显示文摘 | DONALDSON GC SEEMUNGAL TA BHOWMIK A | 2002 | Thorax2002，57，： | 1 |
| 14 | Analysis and simulation of a synthetic-aperture technique for imaging through a turbulent medium 显示文摘 | R B Holmes S Ma A Bhowmik | 1996 | J Opt SocAm A1996，13，2： | 1 |
| 15 | Simultaneous De- modulation And Dispersion Compensation Of WDM DPSK Channels Us- ing Optical ring Resonator显示文摘 | BHOWMIK B B GUPTA S GANGOPADHYAY R | 2012 | Optics Communications2012，285，16： | 1 |
| 16 | Spin hall effect clocking of nanomagnetic logic without a magnetic field 显示文摘 | Bhowmik D You L Salahuddin S | 2015 | Nature Nanotechnology2015，9，1： | 1 |
| 17 | Aggregate preferred correspondence and the existence of a maximin REE 显示文摘 | BHOWMIK A CAO J YANNELIS N C | 2014 | J Math Anal Appl2014，414，： | 1 |
| 18 | Histamine H recep- tor antagonists in relation to epilepsy and neurodegenera- tion: a systemic consideration of recent progress and per- spectives 显示文摘 | Bhowmik M Khanam R Vohora D | 2012 | Br J Pharmaeol2012，167，7： | 1 |
| 19 | Changes in storage quality and shelf life of green asparagus over an extended harvest season显示文摘 | BHOWMIK P K MATSUI T IKEUCHI T | 2002 | Postharvest Biology and Technology2002，26，： | 1 |
| 20 | Sputum and plasma endothelin-1 levels in exacerbations of chronic obstructive pulmonary disease显示文摘 | Roland M Bhowmik A Sapsford RJ | 2001 | Thorax2001，56，1： | 1 |
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