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Is the Trade-led Growth Hypothesis Valid for the Kingdom of Saudi Arabia?Evidence from an ARDL Approach

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Fudan Journal of the Humanities and Social Sciences 2021年第3期14卷 445-463页

作者： Md.saiful islam Department of Economics and Finance College of Business AdministrationUniversity of HailHailKingdom of Saudi Arabia

This study examines the trade-led growth(TLG)hypothesis for the Kingdom of Saudi *** time-series annual data for the period 1985-2019,the ARDL approach and Toda-Yamamoto Granger causality test are applied to accomplish the *** ARDL estimation reveals that trade openness positively causes economic growth in both the long and short run,and the TLG hypothesis is found valid for the *** Toda-Yamamoto Granger causality test results have evidenced several unidirectional *** them,trade openness causes economic growth and supports the ARDL finding and hence the TLG hypothesis for the ***,trade openness causes gross fixed capital formation,and the labor force stimulates both economic growth and trade *** findings recommend that the Kingdom may increase its trade to reap further benefits and enhance its income growth.

关键词： Trade-led growth Trade openness Economic growth Labor force Kingdom of Saudi Arabia

Sources and Ecological Risks of Heavy Metals in Soils Under Different Land Uses in Bangladesh

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Pedosphere 2019年第5期29卷 665-675页

作者： Mohammad saiful islam Mohammad Kawser AHMED Mohammad Habibullah AL-MAMUN Shah Mohammad Asraful islam Department of Soil Science Patuakhali Science and Technology UniversityDumkiPatuakhali 8602 (Bangladesh) Environment and Information Sciences Yokohama National UniversityYokohama 240-8501 (Japan) Department of Oceanography University of DhakaDhaka 1000 (Bangladesh) Department of Fisheries University of DhakaDhaka 1000 (Bangladesh) Department of Plant Pathology Patuakhali Science and Technology UniversityDumkiPatuakhali 8602 (Bangladesh)

Soil heavy metal pollution, influenced by both natural and anthropogenic factors, significantly reduces environmental quality. In this study, Cr, Ni, Cu, As, Cd, and Pb in eight different land-use soils from Patuakhali District in Bangladesh were assessed. Concentrations of Cr, Ni, Cu, As, Cd, and Pb in soils were 1-87, 5-271, 4-181, 0-80, 0.2-24.0, and 5-276 mg kg-1, respectively, measured using an inductively coupled plasma-mass spectrometer. The enrichment factor, pollution load index (PLI), and contamination factor (CJ) of metal i were used to assess the ecological risk posed by metals in soils. The PLI ranged from 0.78 to 2.66, indicating baseline levels to progressive deterioration of soil due to metal contamination. However, C;of Cd ranged from 1.8 to 12.0, which showed that the studied soils were strongly impacted by Cd. Considering the severity of the potential ecological risk of a single metal, the descending order was Cd > As > Pb > Cu > Ni > Cr. Soils under all land uses showed moderate to very high potential ecological risk.

关键词： Cd contamination factor degree of contamination enrichment factor environmental quality pollution load index soil deterioration soil pollution

Antioxidant,antibacterial and cytotoxic effects of the phytochemicals of whole Leucas aspera extract

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Asian Pacific Journal of Tropical Biomedicine 2013年第4期3卷 273-279页

作者： Md Atiar Rahman Md saiful islam Department of Biochemistry and Molecular Biology University of ChittagongChittagong-4331Bangladesh Department of Biochemistry School of BiochemistryGenetics and MicrobiologyUniversity of KwaZulu-Natal.(Westville Campus)Durban 4000South Africa

Objective:To investigate the antioxidant,antibacterial and cytotoxic activity of whole Leucas aspera(Labiatae)(***)alcoholic ***:Whole *** powder was extracted by absolute ethanol(99.50%).The ethanolic extract was subjected to antioxidant,antibacterial and brine shrimp lethality ***:The extract showed potent radical scavenging effect(antioxidant)with IC_(50)value of(99.58±1.22)μg/mL which was significant(P<0.01)in comparison to ascorbic acid with IC_(50)value of(1.25±0.95)μg/*** case of antibacterial screening,the extract showed notable antibacterial effect against the tested microbial ***(P<0.05)zone of inhibitions against Gram positive Bacillus subtilis[(12.00±1.32)mm]and Bacillus megaterium[(13.00±1.50)mm],Staphylococcus aureus[(8.00±0.50)mm]and Gram negative Salmonella typhi[(6.00±0.50)mm],Salmonella paratyphi[(8.00±1.00)mm],Shigella dysenteriae[(9.00±1.32)mm]and Vibrio cholerae[(9.00±0.66)mm]was *** brine shrimp lethality bioassay,the extract showed the LC_(50)value as(181.68±2.15)μg/mL which was statistically significant(P<0.01)compared to positive control vincristine sulfate[LC_(50)=(0.76±0.04)μg/mL].Conclusions:The results demonstrate that the ethanolic extract of *** could be used as antibacterial,pesticidal and various pharmacologic actives.

关键词： Leucas aspera Radical scavenging Antibacterial Cytotoxic Probit

Study on the Sustainable Strategy of H&M

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Study on the Sustainable Strategy of H&M

作者： Md. saiful islam 上海外国语大学

学位级别：硕士

The assurance of corporate sustainability reporting has long been a controversial *** management and suppliers are routinely accused of violating principles ofsustainability, an important exercise in public accountability. This thesis responds to recent callsfor an analysis of the process by which the violation takes place. Integrating elements of neo-institutional theory and arena concept, the thesis provides a detailed study of the sustainablestrategy of H&M.This paper provides a thorough description of various threats to the sustainabledevelopment of H&M, such as their cotton frond problem, transport problem, employees training,customer dealings, etc. After that, the paper provides an account of H&M’s effort to seek asolution package to these threats, which together is represented as H&M’s sustainability *** the solution efforts are: they have their own sustainable strategy department, in thiswhich H&M tries to improve itself and resolve their sustainability problems;they are doing a lotof social work, like children education investment, employee training, thus making muchpositive contribute to the community in which it operates. This paper also provides informationon the result of H&M’s sustainability strategy, and draws some lessons from the overall case,which may prove meaningful to other similar clothing companies.

关键词： sustainable development sustainable strategy H&M clothing industry

Human and ecological risks of metals in soils under different land-use types in an urban environment of Bangladesh

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Pedosphere 2020年第2期30卷 201-213页

作者： Md.saiful islam Md.Kawser AHMED Md.Habibullah Al-MAMUN Dennis Wayne EATON Department of Soil Science Patuakhali Science and Technology UniversityDumkiPatuakhali 8602Bangladesh Graduate School of Environment and Information Sciences Yokohama National University79-7 TokiwadaiHodogaya-kuYokohamaKanagawa 240-8501Japan Department of Oceanography University of DhakaDhaka 1000Bangladesh Department of Fisheries University of DhakaDhaka 1000Bangladesh Contract Faculty Rutgers UniversityNew BrunswickNJ 08901-8554USA

Trace metal contamination in soil is of great concern owing to its long persistence in the environment and toxicity to humans and other *** of six potentially toxic trace metals,Cr,Ni,Cu,As,Cd,and Pb,in urban soils were measured in Dhaka City,*** from different land-use types,namely,agricultural field,park,playground,petrol station,metal workshop,brick field,burning sites,disposal sites of household waste,garment waste,electronic waste,and tannery wast,and construction waste demolishing sites,were *** concentration ranges of Cr,Ni,Cu,As,Pb,and Cd in soils were 2.4–1258,8.3–1044,9.7–823,8.7–277,1.8–80,and 13–842 mg kg^-1,*** concentrations of metals were subsequently used to establish hazard quotients(HQs)for the adult *** metal HQs decreased in the order of As>Cr>Pb>Cd>Ni>*** was the most vital exposure pathway of studied metals from soils followed by dermal contact and *** range of pollution load index(PLI)was 0.96–17,indicating severe contamination of soil by trace *** the comprehensive potential ecological risk(PER),soils from all land-use types showed considerable to very high ecological *** findings of this study revealed that in the urban area studied,soils of some land-use types were severely contaminated with trace ***,it is suggested that more attention should be paid to the potential health risks to the local inhabitants and ecological risk to the surrounding ecosystems.

关键词： hazard quotient health risk land use potential ecological risk soil pollution trace metals urban soil

Invaders’ control on post-disturbance succession in coastal mangroves

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Journal of Plant Ecology 2012年第2期5卷 157-166页

作者： Shekhar R.Biswas Md.saiful islam Khan Azim U.Mallik Department of Ecology and Evolutionary Biology University of Toronto3359 Mississauga RoadMississaugaOntario L5L1C6Canada United Nations Environment Programme-World Conservation Monitoring Centre(UNEP-WCMC) Cambridge CB30DLUK Forest and Landscape LIFECopenhagen University1958 Frederiksberg CDenmark Department of Biology Lakehead University955 Oliver RoadThunder BayOntario P7B 5E1Canada

Aims In recent years,coastal mangroves have been frequently affected by large disturbances(cyclones,hurricanes,flooding and tsunamis)and post-disturbance vegetation is often dominated by small stature mangrove,mangrove-associate and non-mangrove species potentially affecting ecosystem *** on the processes of mangrove vegetation development and recovery(succession)following normal and large disturbances will benefit practitioners in designing robust ecosystem management/restoration *** we propose a conceptual model of disturbance-mediated succession in *** Based on field observations and species’life history traits,we develop conceptual models of mangrove succession under normal disturbance regime and recently experienced increased frequency of large *** evaluate our conceptual models by conducting a scenario testing *** Findings We suggest two predominant processes affecting mangrove succession after disturbance:propagule limitation due to damage of seed producing mature trees and dispersal barrier resulting from biological invasion associated with large *** argue that large disturbances affect mature trees more than the small-stature non-tree(shrubs,herbs and climbers)species creating a larger propagule shortage for mangrove tree species than non-tree ***,large disturbances facilitate invasion of free-floating aquatics,which may interfere with the flow-facilitated propagule dispersal and seedling establishment of mangrove *** a scenario testing experiment,we have shown that similar levels of disturbance impact vegetation development and recovery differently depending on the presence or absence of invasive *** conclude that since biological invasion is one of the major drivers of post-disturbance mangrove succession,the dimension of biological invasion should be included in prediction,management and restoration of mangrove forests.

关键词： biological invasion cryptic ecological degradation dispersal barrier large disturbances mangrove restoration mangrove succession

Detection of COVID-19 and Pneumonia Using Deep Convolutional Neural Network

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Computer Systems Science & Engineering 2023年第1期44卷 519-534页

作者： Md.saiful islam Shuvo Jyoti Das Md.Riajul Alam Khan Sifat Momen Nabeel Mohammed Department of Electrical and Computer Engineering North South UniversityPlot 15Block BBashundharaDhaka1229Bangladesh

COVID-19 has created a panic all around the *** is a contagious dis-ease caused by Severe Acute Respiratory Syndrome Coronavirus 2(SARS-CoV-2),originated from Wuhan in December 2019 and spread quickly all over the *** healthcare sector of the world is facing great challenges tackling COVID *** of the problems many have witnessed is the misdiagnosis of COVID-19 cases with that of healthy and pneumonia *** this article,we propose a deep Convo-lutional Neural Network(CNN)based approach to detect COVID+(i.e.,patients with COVID-19),pneumonia and normal cases,from the chest X-ray ***-19 detection from chest X-ray is suitable considering all aspects in compar-ison to Reverse Transcription Polymerase Chain Reaction(RT-PCR)and Computed Tomography(CT)*** deep CNN models including VGG16,InceptionV3,DenseNet121,DenseNet201 and InceptionResNetV2 have been adopted in this pro-posed *** have been trained individually to make particular *** results demonstrate that DenseNet201 provides overall better performance with accuracy,recall,F1-score and precision of 94.75%,96%,95%and 95%*** careful comparison with results available in the literature,we have found to develop models with a higher *** the studies were carried out using a publicly available chest X-ray(CXR)image data-set.

关键词： COVID-19 convolutional neural network deep learning DenseNet201 model performance

Cardio- and hepato-protective potential of methanolic extract of Syzygium cumini(L.) Skeels seeds:A diabetic rat model study

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Asian Pacific Journal of Tropical Biomedicine 2017年第2期7卷 126-133页

作者： Sumaiya Nahid Kishor Mazumder Zillur Rahman saiful islam Md. Humayun Rashid Philip Grey Kerr Department of Pharmacy University of Science and Technology ChittagongFoy's LakePahartaliChittagong 4202Bangladesh School of Biomedical Sciences Charles Sturt UniversityBoorooma StreetWaggaWaggaNew South Wales 2678Australia Department of Pathology Chittagong Medical College HospitalChittagong 4202Bangladesh

Objective: To evaluate the effect of methanolic extract of Syzygium cumini(L.) Skeels(S. cumini) seeds on the major organs in an animal model of diabetes through biochemical and histopathological ***: The methanolic extracts of S. cumini seeds(100 and 200 mg/kg body weight) were administered to alloxan-induced diabetic rats daily, with fasting blood glucose levels being measured by glucometry at one-day interval for a duration of two weeks. Biochemical assays to evaluate changes in the functions of the heart, liver,pancreas and kidney were carried out. Histopathological changes in the diabetic rat organs(pancreas, liver, heart, kidney and spleen) were also observed after the 14 days of treatment with the ***: Oral administration of methanolic extracts of S. cumini seeds(100 and 200 mg/kg body weight), with gliclazide as a positive control(25 mg/kg), showed beneficial effects including lowering blood glucose levels(P < 0.001), improved heart and liver functions, and hyperlipidemia due to diabetes. At 200 mg/kg, the extracts reversed cardiac and liver damage caused by ***: In addition to the anti-hyperglycemic activity of methanolic extracts of S. cumini seeds, the extracts demonstrates potential to minimize cardiac and hepatic complications.

关键词： Syzygium cumini seeds Diabetes Cardioprotection Hepatoprotection

Comparative investigation of the free radical scavenging potential and anticancer property of Diospyros blancoi(Ebenaceae)

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Asian Pacific Journal of Tropical Biomedicine 2016年第5期6卷 410-417页

作者： Muhammad Ali Khan Mahbubur Rahman Nazmul Sardar saiful islam Arman Badrul islam Jahangir Alam Khandakar Mamunur Rashid Golam Sadik AHM Khurshid Alam Department of Pharmacy Bangabandhu Sheikh Mujibur Rahman Science and Technology University Department of Pharmacy University of Rajshahi Drugs and Toxins Research Division Bangladesh Council of Scientific and Industrial Research Product Development and Validation Department Square Pharmaceutical Limited Laboratory of Genetics Graduate School of BiostudiesKyoto University

Objective: To investigate the comparative effects of Diospyros blancoi(Ebenaceae)leaves(DBL), root bark(DBRB) and stem bark(DBSB) on free radicals and ***: The polyphenol contents, antioxidant and free radical scavenging properties were determined using standard spectrophotometric methods. Cytotoxicity and anticancer activities were performed on brine shrimp nauplii and Ehrlich ascite carcinoma cells, ***: Among the extracts, DBSB showed the highest total antioxidant capacity and reducing capacity on ferrous ion. Based on 1,1-diphenyl-2-picrylhydrazyl and hydroxyl radical scavenging activities, DBSB showed(95.760 ± 0.343)% and(67.460 ± 2.641)%scavenging with IC50of(3.10 ± 0.17) and(50.00 ± 3.11) mg/m L, respectively. The IC50 values of standard butylated hydroxytoluene and catechin(CA) for 1,1-diphenyl-2-picrylhydrazyl and hydroxyl radicals were(8.50 ± 0.25) and(75.00 ± 0.14) mg/m L,respectively suggesting that DBSB had a significant(P DBRB > CA > ***, the phenolic [(139.91 ± 3.924) mg gallic acid equivalent/g] and flavonoid contents[(412.00 ± 16.70) mg catechin equivalent/g)] of DBSB were higher than that of other extracts. In addition, the DBSB showed the moderate cytotoxic and anticancer ***: Our results indicate that Diospyros blancoi stem bark had the significant highest antioxidant and free radical scavenging properties as well as moderate anticancer ***, we assume that the anticancer activity of this plant can be, at least in part, attributed to its content in phenolic compounds as well as its significant free radical scavenging properties.

关键词： Diospyros blancoi Free radicals Polyphenols Antioxidant Cytotoxicity Anticancer