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Chinese Journal of Chemical Engineering 2018年第3期26卷 529-533页

作者： Abdus Samad shamim ahsan Ikki Tateishi Mai Furukawa Hideyuki Katsumata Tohru Suzuki Satoshi Kaneco Department of Chemistry Jagannath University Department of Earth and Atmospheric Sciences Metropolitan State University of Denver Department of Chemistry for Materials Graduate School of Engineering Mie University Mie Global Environment Center for Education & Research Mie University

The indirect photocatalytic reduction of arsenate to arsenite in aqueous solution with titanium dioxide(TiO_2)was investigated with various hole scavengers such as methanol, ethanol, 2-propanol, formaldehyde, acetone,formic acid and acetic acid. Although the direct photocatalytic reduction of arsenate to arsenite with TiO_2 was impossible, an indirect reduction of As(V) was possible in the presence of sacrificial electron donors to form strongly reductive radicals. The addition of ethanol was very effective for indirect photocatalytic reduction of As(V) in aqueous solution with TiO_2 photocatalyst. The indirect photocatalytic reduction rate of As(V) may be related with both the reaction rate constants of reaction of hydroxyl radicals with hole scavenger and the reactivities for the radicals M· which are produced by the reaction of ·OH with hole scavenger.

关键词： Indirect photocatalytic reduction Arsenate Arsenite Titanium dioxide Hole scavenger

Pathogens causing diarrhoea among Bangladeshi children with malignancy: Results from two pilot studies

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World Journal of Clinical Cases 2020年第2期8卷 276-283页

作者： Sabina Karim Ferdousi Begum Afiqul Islam Monowar Ahmad Tarafdar Mamtaz Begum Md Johirul Islam Bushra Malik Md shamim ahsan Ameneh Khatami Harunor Rashid Department of Paediatric Haematology and Oncology National Institute of Cancer Research and HospitalMohakhaliDhaka 1212Bangladesh Department of Pediatric Hematology and Oncology Bangabandhu Sheikh Mujib Medical UniversityDhaka 1212Bangladesh Department of Community Medicine Z.H.Sikder Women’s Medical CollegeDhaka 1212Bangladesh Department of Cancer Epidemiology National Institute of Cancer Research and HospitalMohakhaliDhaka 1212Bangladesh National Centre for Immunisation Research and Surveillance The Children’s Hospital at WestmeadWestmeadNSW 2145Australia Medical Services Rangpur CantonmentRangpur 5400Bangladesh Department of Infectious Diseases and Microbiology The Children’s Hospital at WestmeadNSW 2145Australia Discipline of Child and Adolescent Health Faculty of Medicine and HealthUniversity of SydneyNSW 2145Australia

BACKGROUND Diarrhoea is a frequent symptom in children with cancer, and occurs due to a composite effect of underlying disease and immunosuppression consequent to therapy, malnutrition, and non-infective aetiologies such as mucositis. In a large proportion of cases, the aetiology of diarrhoea remains unknown but is often attributed to multiple pathogens including *** To identify and describe the pathogens causing diarrhoea in Bangladeshi children with *** Two cross-sectional pilot studies were conducted involving paediatric oncology patients with diarrhoea. Stool samples were collected from children who were hospitalised with or without being treated with chemotherapy during the study period, and had diarrhoea at any stage during their admission. In the first study,stool samples were tested by conventional microbiological methods and by polymerase chain reaction for parasites, and by immunoassays for Clostridium difficile. In the second study, conventional microbiology was conducted for bacteria and parasites including an enzyme-linked immunosorbent assay for Cryptosporidium antigen, and in a subset, immunoassays for Clostridium *** In the first study Giardia lamblia was detected in 68.5% of samples, Entamoeba histolytica in 13%, Cryptosporidium in 5.6%, non-toxigenic C. difficile in 22.4%, and other bacteria in 5.2%. In the second study, E. histolytica was detected in 10% of samples, Cryptosporidium in 4.3%, G. lamblia in 1.4%, C. difficile in 5.1%, and other bacteria in 5.7% of *** These pilot data suggest that parasites are important aetiologies of diarrhoea in Bangladeshi children with malignancy. While molecular diagnostic tools detect an array of stool pathogens with greater sensitivity, conventional diagnostic methods are also useful.

关键词： Bangladesh Cancer Child Cryptosporidium Gastroenteritis Parasite

In vivo anticancer activity of vanillin semicarbazone

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Asian Pacific Journal of Tropical Biomedicine 2012年第6期2卷 438-442页

作者： Shaikh M Mohsin Ali M Abul Kalam Azad Mele Jesmin shamim ahsan M Mijanur Rahman Jahan Ara Khanam M Nazrul Islam Sha M Shahan Shahriar Department of Applied Chemistry and Chemical Engineering University of Rajshahi Department of Biochemistry and Molecular Biology University of Rajshahi Department of Chemistry University of Chittagong Department of Food Science & Technology Chittagong Veterinary and Animal Science University

Objective:To evaluate the anticancer activity of vanillin semicarbazone(VSC) against Ehrlich ascites carcinoma(EAC) cells in Swiss albino ***:The compound VSC at three doses(5, 7.5 and 10 mg/kg i.p.) was administered into the intraperitoneal cavity of the EAC inoculated mice to observe its efficiency by studying the cell growth inhibition, reduction of tumour weight,enhancement of survival time as well as the changes in depleted hematological parameters. Allsuch parameters were also studied with a known standard drug bleomycin at the dose of 0.3 mg/kg(i.p.).Results:Among the doses studied, 10 mg/kg(i.p.) was found to be quite comparable in potency to that of bleomycin at the dose of 0.3 mg/kg(i.p.). The host toxic effects of VSC was found to be ***:It can be concluded that VSC can therefore be considered as potent anticancer agent.

关键词： Anticancer activity Ehrlich ascites carcinoma Schiffbase

Comparative studies of elemental composition in leaves and flowers of Catharanthus roseus growing in Bangladesh

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Asian Pacific Journal of Tropical Biomedicine 2016年第1期6卷 50-54页

作者： Shahin Aziz Koushik Saha Nasim Sultana Husna Parvin Nur Md.Aminul ahsan shamim Ahmed Md.Kamal Hossain Chemical Research Division BCSIR Department of Chemistry Jahangirnagar University Bangladesh Council of Scientific and Industrial Research (BCSIR) Laboratories

Objective:To investigate the elemental composition of the leaves and flowers of Catharanthus roseus(***) due to the plant's wide application in the indigenous medicinal system and its chemical constituents' ***:The atomic absorption spectrophotometer was used for quantitative analysis of various ***:Total 13 important elements were analyzed in leaves and flowers of *** indicated the presence of Na,K,Ca,Mg,Cr,Fe,Zn,Al,Cu,Ni,Pb,Cd and Mn in both leaves and *** most important finding of the work was that,leaves of *** showed high concentration of all elements except K and Zn while flowers of *** showed higher concentration of K and ***:The elemental composition in both leaves and flowers of *** were found to be ***,different parts of this medicinal plant are enriched in some micro and macro nutrients like Fe,Ca,Na,K,Zn,which are very important for biological metabolic system as well as human health.

关键词： Bangladesh Catharanthus roseus Indigenous medicinal systems Atomic absorption spectrophotometer Elemental composition

Interaction of ciprofloxacin hydrochloride with sodium dodecyl sulfate in aqueous/electrolytes solution at different temperatures and compositions

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Chinese Journal of Chemical Engineering 2020年第1期28卷 216-223页

作者： Sk.Md.Ali ahsan Md.Ruhul Amin shamim Mahbub Mohammad Robel Molla Shahina Aktar Malik Abdul Rub Md.Anamul Hoque Muhammad Nadeem Arshad Mohammed Abdullah Khan Department of Chemistry Jahangirnagar UniversitySavarDhaka 1342Bangladesh Chemistry Department Faculty of ScienceKing Abdulaziz UniversityJeddah-21589Saudi Arabia Center of Excellence for Advanced Materials Research King Abdulaziz UniversityJeddah-21589Saudi Arabia

Interactions of ciprofloxacin hydrochloride(CPFH)with sodium dodecyl sulfate(SDS)were investigated by conductivity measurement in H2O/electrolyte solutions(NaCl,Na2SO4&Na3PO4)over 298.15–318.15 K temperature range(with 5 K interval)considering the human body *** all cases,two critical micelle concentrations(c*)were observed which are increased in the presence of drug and decreased in the presence of salts enunciating the presence of interaction amongst the studied ***(CPFH+SDS)system in the presence of salt,the c*values at 303.15 K and I=0.50 mmol·kg^-1 followed the order:CNaCl>CNa2SO4>***ΔG1,m0 andΔG2,m0values are found to be negative for all systems that show that the micellization process is thermodynamically ***(CPFH+SDS)system in water,theΔHm0&ΔSm0 values reveal that the micellization processes is both entropy dominated in almost all *** the occurrence of electrolytes,ΔHm0 andΔSm0 values indicate that micellization processes are both entropy&enthalpy restricted at upper temperature but it becomes totally entropy dependent at higher *** higher positiveΔSm0 values indicate the enhanced hydrophobic interaction in presence of *** enthalpy-entropy compensation was determined from the linear relationship betweenΔHm0 andΔSm0 values in every *** transfer energies as well as compensation temperature and intrinsic enthalpy were also evaluated and the behaviors were comparable to other biological system.

关键词： Ciprofloxacin hydrochloride Sodium dodecyl sulfate Critical micelle concentration Thermodynamic indices Hydrophobic effect

Dexamethasone in coronavirus disease 2019 care:Dosage and utilization insights

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World Journal of Virology 2025年第1期14卷 1-4页

作者： Laiba shamim Imshaal Musharaf Abdulqadir J Nashwan Department of Clinical Medicine Jinnah Sindh Medical UniversityKarachi 75510SindhPakistan Department of Medicine Jinnah Sindh Medical UniversityKarachi 75510SindhPakistan Department of Nursing and Midwifery Research Hamad Medical CorporationDoha 3050Qatar

Coronavirus disease 2019(COVID-19)is a contagious disease caused by severe acute respiratory syndrome coronavirus *** was declared a global pandemic on March 11,2020,by the World Health *** excessive inflammatory response is a severe respiratory manifestation of COVID-19,which becomes predominant in later *** to its immunosuppressive and anti-inflammatory properties,dexamethasone is the first systemic glucocorticoid to treat severe COVID-19 *** editorial reviews the efficacy and safety of highdose vs low-dose dexamethasone in patients with *** indicate that using low-dose dexamethasone is beneficial and emphasize the need for additional research on the use of high-dose *** the study provides a robust evidence base,it is limited by the lack of long-term data,focus on specific outcomes and heterogeneity of the included *** research should focus on the long-term effects of dexamethasone and its impact across varying disease severities and patient populations to refine treatment strategies and improve patient care.

关键词： COVID-19 Severe acute respiratory syndrome Corticosteroid Dexamethasone Anti-inflammatory

Detection of QTL(quantitative trait loci) associated with wood density by evaluating genetic structure and linkage disequilibrium of teak

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Journal of Forestry Research 2019年第6期30卷 2247-2258页

作者： Vivek Vaishnav shamim Akhtar Ansari Institute of Forest Productivity

To find the quantitative trait loci associated with wood density in teak(Tectona grandis L.f.), 21 co-dominant markers including 13 site specific recombinase and 8 EST-based co-dominant markers designed from lignin biosynthesis genes were applied to 174 teak plus tree clones at the National Germplasm Bank, Chandrapur,India. The germplasm bank exhibited 10.6% coefficient of variation for wood densities with 84.5 ± 31.3 genetic polymorphism(%). The highly panmictic set of genotypes(FST= 0.035 ± 0.004) harbored 96.47 ± 0.40 genetic variability(%). The average allelic frequency of the 21 codominant markers was 0.65 ± 0.11 with 12.9% pairs of loci in significant LD(p\0.05, R^2 values [ 0.1), confirming their suitability for a strong marker-trait association study. The marker CCoAMT-1 was significantly(p\0.01) associated with wood density showing stability by both GLM and MLM models and explained 4.3% of the phenotypic effect. The marker from the EST representing CCoAMT can be further developed for gene-assisted selection of elite genotypes of teak with greater wood density. Therefore, we believe that the report will help accelerate the genetic improvement and advance the breeding program of the species.

关键词： Association mapping Expressed sequence tags(EST) General linear model(GLM) Linkage disequilibrium(LD) Lignin Mixed linear model(MLM) Principal co-ordinate analysis(PCoA)

Solving constrained portfolio optimization model using stochastic fractal search approach

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International Journal of Intelligent Computing and Cybernetics 2023年第2期16卷 223-249页

作者： Mohammad Shahid Zubair Ashraf Mohd shamim Mohd shamim Ansari Department of Commerce Aligarh Muslim UniversityAligarhIndia Department of Computer Science Aligarh Muslim UniversityAligarhIndia

Purpose-Optimum utilization of investments has always been considered one of the most crucial aspects of capital *** into various securities is the subject of portfolio optimization intent to maximize return at minimum *** this series,a population-based evolutionary approach,stochastic fractal search(SFS),is derived from the natural growth *** study aims to develop portfolio selection model using SFS approach to construct an efficient portfolio by optimizing the Sharpe ratio with risk budgeting ***/methodology/approach-This paper proposes a constrained portfolio optimization model using the SFS approach with risk-budgeting *** is an evolutionary method inspired by the natural growth process which has been modeled using the fractal *** analysis has been conducted to determine the effectiveness of the proposed model by making comparisons with state-of-the-art from domain such as genetic algorithm,particle swarm optimization,simulated annealing and differential *** real datasets of the Indian stock exchanges and datasets of global stock exchanges such as Nikkei 225,DAX 100,FTSE 100,Hang Seng31 and S&P 100 have been taken in the ***-The study confirms the better performance of the SFS model among its ***,statistical analysis has been done using SPSS 20 to confirm the hypothesis developed in the experimental ***/value-In the recent past,researchers have already proposed a significant number of models to solve portfolio selection problems using the meta-heuristic ***,this is the first attempt to apply the SFS optimization approach to the problem.

关键词： Portfolio optimization Risk-budgeting constraint Sharpe ratio Evolutionary algorithm Stochastic fractal search

Fully inkjet-printed microwave passive electronics

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Microsystems & Nanoengineering 2017年第1期3卷 423-429页

作者： Garret McKerricher Mohammad Vaseem Atif shamim King Abdullah University of Science and Technology(KAUST) IMPACT LabComputerElectrical and Mathematical Sciences and Engineering(CEMSE)DivisionThuwal 23955-6900Saudi Arabia

Fully inkjet-printed three-dimensional(3D)objects with integrated metal provide exciting possibilities for on-demand fabrication of radio frequency electronics such as inductors,capacitors,and *** date,there have been several reports of printed radio frequency components metallized via the use of plating solutions,sputtering,and low-conductivity *** metallization techniques require rather complex fabrication,and do not provide an easily integrated or versatile *** work utilizes a novel silver ink cured with a low-cost infrared lamp at only 80℃,and achieves a high conductivity of 1×10^(7) S m^(−1).By inkjet printing the infrared-cured silver together with a commercial 3D inkjet ultraviolet-cured acrylic dielectric,a multilayer process is *** using a smoothing technique,both the conductive ink and dielectric provide surface roughness values of <500 nm.A radio frequency inductor and capacitor exhibit state-of-the-art quality factors of 8 and 20,respectively,and match well with electromagnetic *** components are implemented in a lumped element radio frequency filter with an impressive insertion loss of 0.8 dB at 1 GHz,proving the utility of the process for sensitive radio frequency applications.

关键词： capacitor filter inductor inkjet printing multi-jet radio frequency silver

Genesis of tuff interval and its uranium enrichment in Upper Triassic of Ordos Basin, NW China

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Acta Geochimica 2018年第1期37卷 32-46页

作者： shamim Akhtar Nosheen Sahir Xiaoyong Yang CAS Key Laboratory of Crust-Mantle Materials and Environments University of Science and Technology of China Institute of Geology University of the Azad Jammu &KashmirCity Campus School of Engineering and Technology Asian Institute of Technology

Recently measured high gamma ray values in the Yanchang Formation of the Upper Triassic in the Ordos Basin have added an interesting and controversial twist to the study of the formation’s uranium enrichment and *** uranium and thorium contents in the tuffaceous layer cause high gamma ray values in the Yanchang *** studies,major elements,rare earth elements(REEs),and trace elements have been systematically analyzed to determine the composition,geochemical environment,and diagenetic processes of the *** observed color of the tuffaceous layer in the study area varies from yellow to yellowish *** tuff consists of matrix supported with sub-rounded to sub-angular lithic *** lithic fragments probably derived from pre-existing rocks and incorporated into the tuffaceous layer during volcanic ***,plagioclase,and biotite were observed in well to poorly sorted form,in addition to framboidal pyrite and organic *** ratios of SiO_2/Al_2O_3 ranged from 3.277 to 6.105 with an average of *** ratio of TiO_2/Al_2O_3 varied from 0.037 to 0.201 with an average of 0.061,indicating that the sediments of the tuffaceous layer originated from an intermediate *** distribution patterns show sharp negative Eu anomalies,indicating a reducing environment,which is suitable for uranium deposition.A reducing environment was confirmed by black shale in the base of the Yanchang *** black shale has high organic matter content that can take kerogene from mudstone and provide a reducing environment for uranium enrichment in the tuffaceous ***,negative Eu anomalies and the REE patterns indicate a subduction-related volcanic arc environment as the magma source of the tuffaceous *** values of Rb,Ba,and Sr might be the result of fluid phase activities;low values of Hf and Eu indicate the involvement of crustal material during diagenesis of the *** diagrams(Th/Yb vs Ta/Yb,Th/H

关键词： Tuffaceous layer Gamma ray values Uranium enrichment Yanchang Formation Ordos Basin