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Search Results: 1 - 10 of 15155 matches for " Mohammad Tofazzal Islam "
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Diversity of Secondary Metabolites from Marine Bacillus Species: Chemistry and Biological Activity
Muhammad Abdul Mojid Mondol,Hee Jae Shin,Mohammad Tofazzal Islam
Marine Drugs , 2013, DOI: 10.3390/md11082846
Abstract: Marine Bacillus species produce versatile secondary metabolites including lipopeptides, polypeptides, macrolactones, fatty acids, polyketides, and isocoumarins. These structurally diverse compounds exhibit a wide range of biological activities, such as antimicrobial, anticancer, and antialgal activities. Some marine Bacillus strains can detoxify heavy metals through reduction processes and have the ability to produce carotenoids. The present article reviews the chemistry and biological activities of secondary metabolites from marine isolates. Side by side, the potential for application of these novel natural products from marine Bacillus strains as drugs, pesticides, carotenoids, and tools for the bioremediation of heavy metal toxicity are also discussed.
Does Chitosan Extend the Shelf Life of Fruits?  [PDF]
Tahsin Islam Sakif, Adam Dobriansky, Kelly Russell, Tofazzal Islam
Advances in Bioscience and Biotechnology (ABB) , 2016, DOI: 10.4236/abb.2016.78032
Abstract: The use of hazardous formalin in increasing shelf life of fruits and protecting them from microbial decay by unscrupulous traders is a big health concern for the consumers in Bangladesh. Chitosan is a natural biopolymer produced from the exoskeletons of shrimp and crab, which slows antimicrobial activities and induces immunity of plants against microbial pests. This study aimed to evaluate the efficacy of chitosan on the shelf life extension of some local ripened fruits compared to untreated control. Three doses of chitosan solution viz. 0, 500 and 1000 ppm were sprayed in alternate day on banana (cvs. Shabri and Champa), strawberry, tomato, and oranges. It revealed that chitosan extended shelf life of all fruits by delaying the decay; however, level of protection varied in different kinds of fruits as well as in doses of the chitosan used. Among the tested fruits, decay of tomatoes was most delayed by chitosan. Spraying of both 500 and 1000 ppm of chitosan equally protected 100% decay in tomatoes until 8 days of treatments at room temperature. More than 80% protection of other fruits viz. banana, orange and strawberries by chitosan were recorded at 8, 8 and 4 day after treatment, respectively, which were remarkably higher than the untreated control. Interestingly, 500 ppm of chitosan spray gave better protection than 1000 ppm in all the tested fruits. These results suggest that lower doses of chitosan can be utilized as a natural preservative of fruits alternative to hazardous formalin. A further study with higher number of fruits, and at varying temperature and chitosan doses are needed for recommending it for practical application as a fruit preservative.
Simultaneous Detection of Colletotrichum acutatum and C. gloeosporioides from Quiescently Infected Strawberry Foliage by Real-Time PCR Based on High Resolution Melt Curve Analysis  [PDF]
Mahfuz Rahman, Tofazzal Islam, Rosemary Schwegel, Frank J. Louws
American Journal of Plant Sciences (AJPS) , 2019, DOI: 10.4236/ajps.2019.103028
Abstract: Anthracnose of strawberry, caused primarily by the fungal pathogens belonging to Colletotrichum acutatum species complex (CASC) and C. gloeosporioides species complex (CGSC) is an economically important disease in the Southeast United States. Quiescently infected (QI) planting stock is one of the most important sources of inoculum in the fruiting field that can only be reliably detected by highly sensitive real time quantitative PCR (q-PCR) assay. In this study, a q-PCR assay was developed and optimized that can discriminate anthracnose fruit rot (AFR) and anthracnose crown rot (ACR) causing species based on the difference in post PCR melting temperatures of amplicons. Controlled environment grown plants artificially inoculated with different levels of CASC and CGSC showed a significant (P < 0.001) correlation with levels of quantification expressed by Ct values in q-PCR from petioles and leaf blades. The leaf blade was a significantly larger reservoir of QI than that of the petiole. Both TaqMan and SYBR Green assay showed similar sensitivity and specificity. Detection of QI on leaves at young middle and older stages from inoculation with same number of conidia indicated that middle aged leaves were the best for assessing QI. Quantification of QI from middle aged leaf samples from a strawberry fruiting field that has been planted with pre-inoculated plants at both ends of rows and let inoculum spread showed higher sensitivity and precision by q-PCR compared to that of a traditional paraquat assay. The assay developed and validated in this study offers a new tool for evaluating planting stocks for QI to make decision on preventative control for strawberry anthracnose.
Insights the Practice of Integrated Reporting: A Study on MNCs in Bangladesh on the Degree of Adherence to the Reporting Framework  [PDF]
Ranjita Islam, Mohammad Rakibul Islam
Open Journal of Business and Management (OJBM) , 2018, DOI: 10.4236/ojbm.2018.63056
Integrated Reporting (IR) stands for organizational reporting which is prepared for public disclosure and includes both financial and important non-financial information. Existing financial reporting standards are inadequate to address issues like the importance of intangible assets, corporate impacts on the environment, human health, societal conditions and corporate influence on the political process. Thus, the concept of IR emerged to deal with these issues that affect corporate success. The traditional reporting model focuses on a relatively narrow account of historical financial performance of the value-creation process. Keeping this in mind, the International Integrated Reporting Council (IIRC) has developed an International Integrated Reporting Framework, the core objective of which is to guide organizations in communicating the broad set of information needed by investors and other stakeholders to assess the organization’s long-term prospects in a clear, concise, connected and comparable format. The IIRC shares the view that the evolution of corporate reporting should be led by the communication of value creation by the corporate entities. This paper focuses on the degree of disclosure of Integrated Reporting requirements by the top eleven multinational companies of Bangladesh as per market capitalization. Using annual report content analysis, the findings show that the companies have lately started providing non-financial information regarding environment, society and governance along with financial figures. But it is prominent that they are still providing these information in disconnected strands and as a part of Corporate Governance or CSR disclosures instead of linking these to financial information and providing it as an integrated report.
Current Status and Prospects for E-learning in the Promotion of Distance Education in Bangladesh
Tofazzal ISLAM,Abu Sadeque Md. SELIM
The Turkish Online Journal of Distance Education , 2006,
Abstract: The issue of e-learning as an advanced system for training and educating mass people using information and communication technologies (ICTs) has been received an increasing level of interest in recent years in most of the western countries. In spite of socio-economic constraints, ICTs are rapidly expanding in the developing countries, and thus offering a new scope for the use of e-learning for the promotion of distance education. In Bangladesh, e-learning was first introduced as early as 1960s as a Radiobroadcast followed by a pilot project School Broadcasting Program (SBP) in 1980s and then expanded by the establishment of the National Institute of Educational Media and Technology (NIEMT), which was later transformed into Bangladesh Institute of Distance Education (BIDE) in 1985. The significant progress has been done after the establishment of the Bangladesh Open University (BOU) in 1992 as the first and only national distance learning university. Within a decade of its establishment, enrollment of BOU students have reached nearly 400 thousands, and thus enlisted it as one of the mega-universities. BOU has been offering a variety of formal and non-formal academic programs from certificate to Masters levels using print, TV and radio broadcasts, audio-cassettes and face to face tutorials as the media of delivering its academic courses. Considering the rapid expansion of computer and internet in Bangladesh after 1998s, it is now appropriate time to consider inclusion of some interactive ICTs i.e. e-learning in delivering course materials of BOU or other institutes to promote distance education in Bangladesh. In this paper, we discuss the current situation and future prospects for e-learning in Bangladesh considering the current trend of ICTs expansion in the country.
Role of Synthesis and Exudation of Organic Acids in Phosphorus Nutrition in Plants in Tropical Soils
Hasna Hena Begum,Md. Tofazzal Islam
Biotechnology , 2005,
Abstract: Plants have evolved a diverse array of strategies to uptake adequate Phosphorus (P) under limiting conditions in tropical and sub-tropical soils, including modifications to root architecture (e.g. cluster roots in Proteaceae), carbon metabolism and membrane structure, exudation of low molecular weight organic acids, protons and enzymes and enhanced expression of numerous genes involved in low-P adaptation. These adaptations seem to be less pronounced in mycorrhizal-associated plants as mycorrhiza in roots significantly helps plants in P uptake at low P soils. The formation of cluster roots in concert with enhanced exudation of low molecular weight organic acids such as citric, oxalic, malic, fumaric, succinic etc. under P-stress by the non-mycorrhizal plants and the accompanying biochemical changes exemplify many of the plant adaptations that enhance P acquisition and use. Several biotechnological approach are now in progress to increase exudation of organic acids from the roots of economically important crop plants for sustainable crop production in tropical and sub-tropical soils.
Importance of Girls’ Education as Right: A Legal Study from Islamic Approach  [PDF]
Mohammad Saiful Islam
Beijing Law Review (BLR) , 2016, DOI: 10.4236/blr.2016.71001
Abstract: Knowledge gaining and application is a fundamental necessity for all Muslims to qualify them to believe according to the ideologies of the religion. Islam ordered acquisition and dissemination of knowledge is obligatory (fard) upon its believers, irrespective of gender. The aim of education in Islam is to produce a decent human being who is talented of delivering his duties as a servant of Allah and His vicegerent (khalīfah) on earth. This paper is an effort to examine the concept, goal and objectives of education on the view point of Islam. The aim of this article is to present and analyze the exact views of Islam regarding girls’ education from the ultimate source of Islam. These works also try to pick out the common barriers of girls’ education in Bangladesh.
The Sustainable Use of Outer Space: Complications and Legal Challenges to the Peaceful Uses and Benefit of Humankind  [PDF]
Mohammad Saiful Islam
Beijing Law Review (BLR) , 2018, DOI: 10.4236/blr.2018.92016
Abstract: All over the world space applications are considered as vital tools for carrying development in respect of social, economic and environment. The major space faring country grows their economy, science, technology, security through the use of space. Predominantly, events for economic growth through space exploration have considered noteworthy in the international arena. An uninterrupted increase of space activities indicates that space law and policies have become significant for a large number of countries. However, increasing the space faring nations, commercialization by the public, private entities and privation of political willingness of influential countries also denote the new concern to the peaceful use of space, maintaining space safety, security and sustainability. The existing legal protection towards the peaceful and sustainable uses of space is not measured satisfactorily well-organized and competent. Particularly, the issue of commercialization of space is not well agreed. The goal of this paper is to examine the shortcomings of present regimes and legal challenges to the sustainable use of space with identifying that there is an urgent necessity for effective and more comprehensive regime not just at the international level, but also at the national level.
The Historical Evolution of International Humanitarian Law (IHL) from Earliest Societies to Modern Age  [PDF]
Mohammad Saidul Islam
Beijing Law Review (BLR) , 2018, DOI: 10.4236/blr.2018.92019
Abstract: International humanitarian law earlier known as the law of war is applied in the armed conflict to protect those who don`t take part in the hostilities or no longer taking part in the hostilities. Even in absence of any international document the earliest societies or communities would have followed some rules of war during conflict either as per the instructions of the community leader or customs or religions. The paper addresses the earlier scattered provisions of the law of war (LOW) or international humanitarian law (IHL) in various religious books, customs and practices. It then turns to the development of IHL by the codification of the rules of war in various international and national documents. This article also focuses on the significant development of IHL by adopting the four Geneva conventions (GCs) and its three additional protocols (AP) and most importantly progress and promotion of IHL by incorporating the laws of armed conflict in the national legislations.
Tofazzal ISLAM,Morshedur RAHMAN,K. M. Rezanur RAHMAN
The Turkish Online Journal of Distance Education , 2006,
Abstract: A new member of the mega-Universities, Bangladesh Open University (BOU) introduced a course team approach for developing effective course materials for distance students. BOU teaching media includes printed course books, study guides, radio and television broadcasts, audiocassettes and occasional face-to-face tutorials. Each course team comprises specialist course writer(s), editor, trained style editor, graphic designer,illustrator, audio-visual producer and anonymous referees. An editorial board or preview committee is responsible for the final approval for publishing or broadcasting materials for learners. This approach has been proved to be effective, but appeared to be complicated and time-consuming. This report focuses on the quality and processes of BOU course materials development taking into account the strengths and weaknesses of the current approach.
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