Volume-4 ~ Issue-1 ~ jan. – Feb. 2018

Abstract: This research was conducted to examine comparison between hardwood and softwood components. Cellulose, hemicellulose and lignin are major constituents for both hardwood and softwood. Depending on these constituents wood's application varies. In this study we examined 10 important wood samples (5 are hardwoods & 5 are softwoods) which are mostly available in Bangladesh. The wood samples were tested in some standard chemical methods, whose samples were dewaxed and depectinised, then the lignin content was measured (mainly using H2SO4). After the removal of the lignin, two other mains components α-cellulose and hemicelluloses were measured. The average components values are 40-50% cellulose, 15-40% hemicelluloses and 18-25% lignin for hardwoods. On the other hand, the average components values are 40-45% cellulose, 24-37% hemicellulose and 25-30% lignin for softwoods.According to their lingo-cellulosic contents they can convert into various useful products. Also by these constituents of hardwood and softwood they may be useful for same or different purposes.

Key words: Softwood, Hardwood, Cellulose, Hemicellulose and Lignin.

Abstract: This study examines the seasonal variation and asses surface water quality of Sundarbans Mangrove Forest in Bangladesh. The statistical analysis ANOVA was used to explore the seasonal variations among three seasons.Water quality and seasonal variation were assessing by measured twelve physico-chemical parameters like Temperature, EC (Electrical Conductivity), pH, Total Dissolved Solid (TDS), Total Suspended Solid (TSS), Salinity, Total Alkalinity, Total Acidity, Free dissolved CO2, Dissolved Oxygen (DO), Biochemical Oxygen Demand (BOD) and Chemical Oxygen demand (COD). The values most of the water quality parameters indicate that the sundarbans aquatic habitat is at suitable range for aquatic species but have a little concern about Salinity values. During study timelow level of BOD and COD value indicates that the organic waste pollution was insignificant in the Sundarbans water. The statistical analysis ANOVA shows a significant seasonal variation among three seasons at 0.01 levels of significance.

Key words: Seasonal Variation, Water Quality, Habitat, Aquatic Biodiversity and Sundarbans Mangrove Forest..

Abstract: Every research paper includes a method section. It is one of the most easily written section and still accounts for 30% of rejection rate (1).This paper aims to facilitate the writing of the method section by providing threemodels namely Matrix approach ,Pyramid approach ,Concept map/brain map and last but with a condensed and comprehensive account into all ten components of method via text and a Master flowchart and a brief illustrative view of methodology. Also to make the nature of writing easy and to facilitate a tailored approach that goes from general to specific ,a multiple number of questionnaires have been provided with a special emphasis on biomedical researchto tailor the need of a wide number of disciplines and subdisciplines of biomedical sciences and provide a quick checklist.

Key words: Research, method, methodology, shortcomings , models, biomedical research