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45篇 您的检索式:作者名="Ghulam ABBAS"
    题名 作者 年代 出处 被引量
1耐碱反硝化菌株的分离鉴定与功能检测显示文摘【目的】分离获得耐碱反硝化菌株,确定其反硝化活性和耐碱能力。【方法】分离、纯化,获得耐碱反硝化菌株;通过形态观察、生理生化试验和16S rRNA基因测序分析,确定菌株分类地位;试验起始硝酸盐浓度和起始pH对分离菌株反硝化活性的影响。【结果】从实验室稳定运行的高效反硝化反应器中分离获得耐碱反硝化菌株R9,经鉴定归于Diaphorobater nitroreducens;菌株R9能够以甲醇为电子供体、硝酸盐为电子受体进行异养生长,当起始硝氮浓度为50 mg/L、起始pH为9.0时,288 h内硝氮去除率达93.25%;高浓度硝氮可抑制其反硝化活性,半抑制常数Ki为202.73 mg N/L;菌株R9的耐碱性良好,起始pH为11.0时的硝氮去除率是pH为9.0时的86%。【结论】菌株R9归于Diaphorobater nitroreducens,最适生长pH为9.0左右,是一株耐碱反硝化菌。王茹 郑平 厉巍 陈慧 陈婷婷 Abbas Ghulam 2013微生物学报2013,53,4:6
2Return 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 2018Journal of Systems Science and Information2018,9,2:6
3Recent advances in the development of nanomedicines for the treatment of ischemic stroke显示文摘Ischemic stroke is still a serious threat to human life and health,but there are few therapeutic options available to treat stroke because of limited blood-brain penetration.The development of nanotechnology may overcome some of the problems related to traditional drug development.In this review,we focus on the potential applications of nanotechnology in stroke.First,we will discuss the main molecular pathological mechanisms of ischemic stroke to develop a targeted strategy.Second,considering the important role of the blood-brain barrier in stroke treatment,we also delve mechanisms by which the blood-brain barrier protects the brain,and the reasons why the therapeutics must pass through the blood-brain barrier to achieve efficacy.Lastly,we provide a comprehensive review related to the application of nanomaterials to treat stroke,including liposomes,polymers,metal nanoparticles,carbon nanotubes,graphene,black phosphorus,hydrogels and dendrimers.To conclude,we will summarize the challenges and future prospects of nanomedicine-based stroke treatments.Xing Tian Taojian Fan Wentian Zhao Ghulam Abbas Bo Han Ke Zhang Nan Li Ning Liu Weiyuan Liang Hao Huang Wen Chen Bing Wang Zhongjian Xie 2021Bioactive Materials2021,6,9:4
4Antimicrobial chemical constituents from endophytic fungus Phoma sp.显示文摘Objective:To evaluate the antiniicrobial polenlial of different extracts of the endophytic fungus Phoma sp.and the tentative identification of their active constituents.Methods:The extract and compounds were screened for antimicrobial activity using the Agar Well Diffusion Method.Four compounds were purified using column chromatography and tlieir structures were assigned using~1H and~(13)C NMR spectra,DEPT,2D COSY,HMQC and HMBC experiments.Results:The ethyl acetate fraction of Phoma sp.showed good antifungal,antibacterial,and algicidal properties.One new dihydrofuran derivative,named phomafuranol(1),together with tliree known compounds,phomalacton(2),(3R)-5-hydroxymellein(3)and emodin(4)were isolated from the ethyl acetate fraction of Phoma sp.Preliminary studies indicated that phomalacton(2)displayed strong antibacterial,good antifungal and antialgal activities.Similarly(3R)-5-hydroxymellein(3)and emodin(4)showed good antifungal,antibacterial and algicidal properties.Conclusions:Antimicrobial activities of the ethyl acetate fraction of the endophytic fungus Phoma sp.and isolated compounds clearly demonstrate that Phoma sp.and its active compounds represent a great potential for the food,cosmetic and pharmaceutical industries.Hidayat Hussain Ines Kock Ahmed Al-Harrasi Ahmed Al-Rawahi Ghulam Abbas Ivan R.Green Afzal Shah Amin Badshah Muhammad Saleem Siegfried Draeger Barbara Schulz Karsten Krohn 2014Asian Pacific Journal of Tropical Medicine2014,7,9:3
5Outcomes After Minimally Invasive Esophagectomy: Review of Over 1000 Patients显示文摘James D. Luketich Arjun Pennathur Omar Awais Ryan M. Levy Samuel Keeley Manisha Shende Neil A. Christie Benny Weksler Rodney J. Landreneau Ghulam Abbas Matthew J. Schuchert Katie S. Nason 2012Annals of Surgery2012,,1:3
6Recent Advances and Challenges Toward Application of Fibers and Textiles in Integrated Photovoltaic Energy Storage Devices显示文摘Flexible microelectronic devices have seen an increasing trend toward development of miniaturized,portable,and integrated devices as wearable electronics which have the requirement for being light weight,small in dimension,and suppleness.Traditional three-dimensional(3D)and two-dimensional(2D)electronics gadgets fail to effectively comply with these necessities owing to their stiffness and large weights.Investigations have come up with a new family of one-dimensional(1D)flexible and fiber-based electronic devices(FBEDs)comprising power storage,energy-scavenging,implantable sensing,and flexible displays gadgets.However,development and manufacturing are still a challenge owing to their small radius,flexibility,low weight,weave ability and integration in textile electronics.This paper will provide a detailed review on the importance of substrates in electronic devices,intrinsic property requirements,fabrication classification and applications in energy harvesting,energy storage and other flexible electronic devices.Fiber-and textile-based electronic devices for bulk/scalable fabrications,encapsulation,and testing are reviewed and presented future research ideas to enhance the commercialization of these fiber-based electronics devices.Amjid Rafique Isabel Ferreira Ghulam Abbas Ana Catarina Baptista 2023Nano-Micro Letters2023,15,3:3
7A switch-on molecular biosensor for detection of caspase-3 and imaging of apoptosis of cells显示文摘Apoptosis is a form of programmed cell death that is essential for maintaining internal environmental stability.Disordered apoptosis can cause a variety of diseases;therefore,sensing apoptosis can provide help in study of mechanism of the relevant diseases and drug development.It is known that caspase-3 is a key enzyme involved in apoptosis and the expression of its activity is an indication of apoptosis.Here,we present a genetically encoded switch-on m Neon Green2-based molecular biosensor.m Neon Green2 is the brightest monomeric green fluorescent protein.The substrate of caspase-3,DEVD amino acid residues,is inserted in it,while cyclized by insertion of Nostoc punctiforme Dna E intein to abolish the fluorescence(inactive state).Caspase-3-catalyzed cleavage of DEVD linearizes m Neon Green2 and rebuilds the natural barrel structure to restore the fluorescence(activated state).The characterization exhibited that the Caspase-3 biosensor has shortened response time,higher sensitivity,and prolonged functional shelf life in detection of caspase-3 amongst the existing counterparts.We also used the Caspase-3 biosensor to evaluate the effect of several drugs on the induction of apoptosis of He La and MCF-7 tumor cells and inhibition of Zika virus invasion.Rui Gong Dianbing Wang Ghulam Abbas Shimin Li Qian Liu Mengmeng Cui Xian-En Zhang 2022Science China(Life Sciences)2022,65,3:2
8Return and Volatility Connectedness between Stock Markets and Macroeconomic Factors in the G-7 Countries显示文摘We examine the relationship between return and volatility of the stock markets and macroeconomic fundamentals for the G-7 countries by using monthly data ranging from July 1985 to June 2015. To meet this end, we apply the spillover index approach based on the generalized VAR framework developed by Diebold and Yilmaz (2012, 2014). The empirical analysis shows strong interactions between the returns and volatilities of the G-7 stock markets and the considered set of corresponding macroeconomic factors including industrial production, money supply, interest rates, inflation, oil prices and exchange rates. The return and volatility spillover transmission/reception dynamics of the relationships between these stock markets and the macroeconomic fundamentals have changed after the global financial crisis of 2008. Our findings provide useful insights for investors and policy makers concerned with the unprecedented swings in the stock markets of G-7 countries.Ghulam Abbas Shawkat Hammoudeh Syed Jawad Hussain Shahzad Shouyang Wang Yunjie Wei 2019Journal of Systems Science and Systems Engineering2019,28,1:2
9Seimatoric acid and colletonoic acid:Two new compounds from the endophytic fungi,Seimatosporium sp.and Colletotrichum sp.显示文摘A new metabolite,named seimatoric acid(1),representing a new oxobutanoic acid derivative has been isolated from Seimatosporium sp., in addition to four known compounds viz.,2-hydroxymethyl-4β,5α,6β-trihydroxycyclohex-2-enone(2),(-)-phyllostine(3),(+)-epiepoxydon(4) and(+)-epoxydon monoacetate(5).Similarly one new benzoic acid derivative,named colletonoic acid(6) was isolated from the ethyl acetate fraction of Colletotrichum sp.The structures of the new compounds were elucidated by detailed ~1 H NMR,^(13)C NMR,COSY,HMQC.HMBC spectroscopic analysis,and HR-E1-MS.Seimatoric acid(1)was also isolated from another taxonomical unidentified fungal strain 4295 in ourgroup.The structures of the known compounds were elucidated by their spectral data comparison to literature data.Preliminary studies showed that colletonoic acid(6) showed good antibacterial,antifungal,and antialgal activities.Hidayat Hussain Natalia Root Farah Jabeen Ahmed Al-Harrasi Ahmed Al-Rawahi Manzoor Ahmad Zahid Hassan Ghulam Abbas Fazal Mabood Afzal Shah Amin Badshah Amjad Khan Riaz Ahmad Ivan R.Green Siegfried Draeger Barbara Schulz Karsten Krohn 2014Chinese Chemical Letters2014,25,12:1
10In vitro and in vivo acaricidal activity of a herbal extract显示文摘Muhammad Arfan Zaman Zafar Iqbal Rao Zahid Abbas Muhammad Nisar Khan Ghulam Muhammad Muhammad Younus Sibtain Ahmed 2011Veterinary Parasitology (-)2011,,3:1
11Anatomic Segmentectomy for the Solitary Pulmonary Nodule and Early-Stage Lung Cancer显示文摘Matthew J. Schuchert Ghulam Abbas Omar Awais Arjun Pennathur Katie S. Nason David O. Wilson Jill M. Siegfried James D. Luketich Rodney J. Landreneau 2012The Annals of Thoracic Surgery2012,,6:1
12Shewanella燃料电池的原理、组成和性能显示文摘微生物燃料电池(MFC)具有治污、产电、研究生物电化学性能等诸多功能,应用前景广阔。Shewanella燃料电池是最早问世的无介体MFC,已有较为全面、深入、系统的研究,可作为探索其他MFC的范例。该文综述了Shewanella燃料电池的生物学原理、结构组成以及治污产电性能,并展望了MFC的发展趋势。陈慧 郑平 谢作甫 张吉强 Abbas Ghulam 2014环境科学与技术2014,37,10:1
13Determination of Copper and Iron in Biological Samples of Viral Hepatitis (A–E) Female Patients显示文摘Hassan Imran Afridi Tasneem Gul Kazi Naveed Gul Kazi Mohammad Khan Jamali Raja Adil Sarfaraz Mohammad Balal Arain Ghulam Abbas Kandhro Abdul Qadir Shah Jamil Ahmed Baig Nusrat Jalbani Rehana Ansari 2009Biological Trace Element Research2009,,1:1
14Arsenic fractionation in sediments of different origins using BCR sequential and single extraction methods显示文摘Jameel Ahmed Baig Tasneem Gul Kazi Muhammad Balal Arain Abdul Qadir Shah Raja Adil Sarfraz Hassan Imran Afridi Ghulam Abbas Kandhro Muhammad Khan Jamali Sumaira Khan 2009Journal of Hazardous Materials2009,,1:1
15Do Macroeconomic Determinants of Non-Performing Loans Vary with the Income Levels of Countries?显示文摘This paper explores the macroeconomic determinants of non-performing loans(NPL) in 19 Asian countries(low to high income economies) using the Generalized Method of Moments estimation approach based on the economic data for the period between 1998 and 2015. The categorization of the economies is based on the average gross national income per capita as set by the World Bank.Specifically, the paper aims to evaluate if the determinants of NPL vary with the income levels of the countries. The results indicate that the NPL is strongly influenced by the inflation rate. The effect is,however, negative in the high-income and the middle-income countries and positive in the low-income countries. The GDP per capita has a dynamic negative relationship with the NPL in the high-income and the low-income countries. The remittance has a significant positive association in the high-income and a significant negative association in the low-income countries. Similarly, the unemployment rate has a positive effect on NPL in the middle-income and the low-income countries. With the rise in the official exchange rate, the NPL level increases in the low-income countries. The overall estimation results suggest that the NPL in Asian banking system depend on some key macroeconomic variables,such as unemployment rate, inflation rate, official exchange rate, remittance received and gross domestic product per capita, and these associations vary with the income level of the countries. Therefore,economic level of a country should be carefully considered while formulating credit policy to minimize credit risks in the banking system.Laxmi KOJU Ghulam ABBAS Shouyang WANG 2018Journal of Systems Science and Information2018,9,6:1
16Uncertainty analysis of runoff and sedimentation in a forested watershed using sequential uncertainty fitting method显示文摘The Soil and Water Assessment Tool(SWAT) was implemented in a small forested watershed of the Soan River Basin in northern Pakistan through application of the sequential uncertainty fitting(SUFI-2) method to investigate the associated uncertainty in runoff and sediment load estimation. The model was calibrated for a 10-year period(1991–2000) with an initial 4-year warm-up period(1987–1990), and was validated for the subsequent 10-year period(2001–2010). The model evaluation indices R^2(the coefficient of determination), NS(the Nash-Sutcliffe efficiency), and PBIAS(percent bias) for stream flows simulation indicated that there was a good agreement between the measured and simulated flows. To assess the uncertainty in the model outputs, p-factor(a 95% prediction uncertainty, 95PPU) and r-factors(average wideness width of the 95 PPU band divided by the standard deviation of the observed values) were taken into account. The 95 PPU band bracketed 72% of the observed data during the calibration and 67% during the validation. The r-factor was 0.81 during the calibration and 0.68 during the validation. For monthly sediment yield, the model evaluation coefficients(R^2 and NS) for the calibration were computed as 0.81 and 0.79, respectively; for validation, they were 0.78 and 0.74, respectively. Meanwhile, the 95 PPU covered more than 60% of the observed sediment data during calibration and validation. Moreover, improved model prediction and parameter estimation were observed with the increased number of iterations. However, the model performance became worse after the fourth iterations due to an unreasonable parameter estimation. Overall results indicated the applicability of the SWAT model with moderate levels of uncertainty during the calibration and high levels during the validation. Thus, this calibrated SWAT model can be used for assessment of water balance components, climate change studies, and land use management practices.Tanveer Abbas Ghulam Nabi Muhammad W.Boota Fiaz Hussain Muhammad I.Azam HuiJun Jin Muhammad Faisal 2016Research in Cold and Arid Regions2016,8,4:1
17Radiofrequency ablation for the treatment of stage I non–small cell lung cancer in high-risk patients显示文摘Arjun Pennathur James D. Luketich Ghulam Abbas Mang Chen Hiran C. Fernando William E. Gooding Matthew J. Schuchert Sebastien Gilbert Neil A. Christie Rodney J. Landreneau 2007The Journal of Thoracic and Cardiovascular Surgery2007,,4:1
18Image-Guided Radiofrequency Ablation of Lung Neoplasm in 100 Consecutive Patients by a Thoracic Surgical Service显示文摘Arjun Pennathur Ghulam Abbas William E. Gooding Matthew J. Schuchert Sebastien Gilbert Neil A. Christie Rodney J. Landreneau James D. Luketich 2009The Annals of Thoracic Surgery2009,,5:1
19Effects of Replacing Fishmeal with Animal By-products Meal Supplementation in Diets on the Growth and Nutrient Utilization of Mangrove Red Snapper显示文摘A feeding trial was conducted for 75 d to evaluate the nutritive value of a mixture of animal by-products(MAB) as a possible protein source in diets for juvenile mangrove red snapper,Lutjanus argentimaculatus(mean initial body weight,30 g). Fish were fed one of five isonitrogenous diets(40% crude protein) replacing 0,25%(MAB25),50%(MAB50),75%(MAB75) and 100%(MAB100) of fish meal protein with similar percentages of MAB. The MAB consisted of 25% cow liver meal,20% leather meal,20% meat and bone meal,15% blood meal,10% APC(poultry feather meal),8% poultry manure dried,1.5% choline and 0.5% chromic oxide. After 75 d of feeding,fish fed with diets MAB50,MAB75 and MAB100 exhibited significantly lower growth per-formance than that of fish fed with control and MAB25 diets. The optimum level of MAB was estimated to be 23%. Replacement of fish meal by MAB23% showed the following performance:maximum weight gain,510%;SGR,2.39% and FCE,2.83%. The MAB substitution up to 75% of fish meal protein in diets did not show differences in apparent protein digestibility(83.6% for MAB25,79.2% for MAB50,78.7% for MAB75) compared with control(83.4%),whereas in MAB100 group digestibility(65.3%) was sig-nificantly lower than in other groups. The apparent phosphorus absorption of test diet groups was significantly higher(37.1% for MAB25,28.5% for MAB50,55.6% for MAB75 and 54.5% for MAB100) than that of control(11.2%). The levels of protein and ash in the whole body,carcass and viscera increased as MAB substitution in diets increased,whereas lipids and moisture remained con-sistent among all treatment groups. These results showed that approximately 23% of fish meal protein could be replaced by a mixture of animal by-products for juvenile snapper growing from 30 g to 167 g in 75 d without compromising growth performance and feed efficiency.Khalid Jamil Ghulam Abbas Rukhsana Akhtar LIN Hong LI Zhenxing 2007Journal of Ocean University of China2007,6,3:1
20A KELM-Based Ensemble Learning Approach for Exchange Rate Forecasting显示文摘In this paper, a KELM-based ensemble learning approach, integrating Granger causality test, grey relational analysis and KELM(Kernel Extreme Learning Machine), is proposed for the exchange rate forecasting. The study uses a set of sixteen macroeconomic variables including, import,export, foreign exchange reserves, etc. Furthermore, the selected variables are ranked and then three of them, which have the highest degrees of relevance with the exchange rate, are filtered out by Granger causality test and the grey relational analysis, to represent the domestic situation. Then, based on the domestic situation, KELM is utilized for medium-term RMB/USD forecasting. The empirical results show that the proposed KELM-based ensemble learning approach outperforms all other benchmark models in different forecasting horizons, which implies that the KELM-based ensemble learning approach is a powerful learning approach for exchange rates forecasting.Yunjie WEI Shaolong SUN Kin Keung LAI Ghulam ABBAS 2018Journal of Systems Science and Information2018,9,4:1
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