This study investigated the ligno-cellulosic properties of jute fiber and jute stick, focusing on variations along different plant sections (bottom, middle, and top). Results for jute fiber indicated that cellulose content was highest at the top (64.57%) and lowest at the bottom (63.18%), while lignin showed the opposite trend, being highest at the bottom (16.07%) and lowest at the top (15.27%). Hemi-cellulose, ash, fat/oil, moisture, and other components in jute fiber did not exhibit significant variations across sections. Similarly, jute stick displayed higher cellulose at the top (47.87%) and lower cellulose at the bottom (46.98%), with lignin following the inverse pattern (25.27% at bottom, 23.91% at top). Hemi-cellulose, ash, fat/oil, moisture, and others in jute stick also showed no significant differences among sections. A comparative analysis revealed that jute fiber contained significantly higher cellulose (~63-64%) and lower lignin (~15-16%) than jute stick (~46-47% cellulose; ~24-25% lignin). Conversely, jute stick had a higher hemi-cellulose content (~25-26%) compared to jute fiber (~18%). These findings highlight distinct compositional profiles between jute fiber and jute stick, as well as gradients along the plant length, which are crucial for optimizing their utilization in various industrial applications, including textiles, paper, bio-energy, and composite materials. Key words: Jute, cellulose, lignin, plant position.
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A field experiment was carried out in Old Brahmaputra Floodplain (AEZ-9) soil at Soil Science Field Laboratory of Bangladesh Agricultural University, Mymensingh during aman season of 2011 to evaluate the response of BINA dhan7 to different levels of potassium and sulphur. The experiment was laid out in a randomized complete block design with three replications. There were six treatments such as T1: Control, T2: NPZnK0S0, T3: Recommended Fertilizer Dose (RFD), T4: RFD-20% KS, T5: RFD-40% KS, T6: RFD + 20% KS and T7: RFD + 40% KS. Eighty kg N ha-1, 15 kg P ha-1, 50 kg K ha-1, 12 kg S ha-1 and 2 kg Zn ha-1 were applied as Recommended Fertilizer Dose (RFD). Nitrogen, phosphorus, potassium, sulphur and zinc were supplied from urea, TSP, MoP, gypsum and zinc oxide, respectively. The full dose of TSP, MoP, gypsum and zinc oxide were applied as basal dose during final land preparation while urea was applied in three equal splits. The application of K and S had a significant influence on plant height, effective tillers hill-1, panicle length and filled grains panicle-1. The grain and straw yields of BINA dhan7 were significantly affected due to different treatments. The highest grain yield of 5.23 t ha-1 and straw yield of 7.05 t ha-1 were observed with the treatment T7 (RFD + 40% KS) and statistically similar yields were recorded with the treatments T6 (RFD + 20% KS) and T3 (RFD). The grain yield was increased by 48.3 to 97.4% over control due to application of different levels of K and S fertilizers. Overall results indicate that there is no need to add more K and S beyond the recommended rate (50 kg K and 12 kg S ha-1) for achieving the satisfactory yield of BINA dhan7 in Old Brahmaputra Floodplain Soil of BINA dhan7 at BAU farm soil, Mymensingh.
Key words: Fertilizer, BINA dhan7, potassium, sulphur
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The main focus of this study was to determine and describe the change of socio economic status of the rural women due to their participation in poverty alleviation programme of motivation, awareness, training and implementation (MATI) in the selected areas of Huzurikanda Union of Nakla Upazila under Sherpur district. The study also explored the relationship between 10 selected characteristics of the MATI beneficiary women and their changes in socio-economic status. Data were collected from the sample of randomly selected 100 MATI beneficiary women out of a total of 400 rural women. The data were collected by using interview schedule which contained simple and direct questions and scales. The socio-economic changes of the rural women under MATI was the dependent variable while age, education, husband’s education, family size, working experience of MATI, contact with MATI personnel, training experience, credit received, credit repayment and credit use of the rural women were the independent variables. The socio-economic status was measured by comparing the before’ and ‘after situation of seven change aspects of the women due to joining in MATI. The significance of change was measured by comparing mean differences between ‘before’ and ‘after’ situation in respect of change in seven areas of socio economic condition of rural women. The change of socio-economic status was significant in five selected aspects while in farm size and toilet condition of the women there had no significant indication of change.
Key words: Socio economic, changes, women, beneficiary.
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Culex quinquefasciatusis is responsible for biting nuisance and spreading some dreadful diseases among human beings. Hence, to protect the human in search of an alternative natural insecticide, an excellent study was designed to evaluate the larvicidal activities of Phyllanthus emblica, Carica papaya and Brassica napus seed extracts against C. quinquefasciatus Say larvae under laboratory condition. The larvicidal activity of P. emblica seed extracts was evaluated at different concentrations of distilled water (2000-8000 ppm), methanol (1000-3000 ppm), acetone (800-1400 ppm) and 50% ethanol (2500-4500 ppm), and LC50 of the four extracts were 4189.230 ppm, 1724.708 ppm,1030.483 ppm and 3354.829 ppm, respectively. In case of C. papaya seed extract larvicidal activity was checked at concentrations of distilled water (2000-8000 ppm), methanol (700-1500 ppm), acetone (200-400 ppm) and 50% ethanol (1000-2000 ppm) and LC50 were 4559.578 ppm, 1000.561 ppm, 265.929 ppm and 1406.930 ppm for the four extracts, respectively. For B. napus seed extracts larvicidal activity was recorded at concentrations of distilled water (7000-15000 ppm), methanol (1500-3500 ppm), acetone (500-1100 ppm) and 50% ethanol (2500-4500 ppm) and LC50 were 10118.017 ppm, 2146.948 ppm,700.689 ppm, and3180.144 ppm respectively. Relative position of the extracts on the basis of LC50 and relative potency values was acetone > methanol > 50% ethanol > distilled water, and that of the seed was C. papaya > P emblica >B. nigrus.
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বাংলাদেশ শত্রুমুক্ত তথা বিজয় দিবসের (১৬/১২/১৯৭১) পর থেকে অর্থাৎ জানুয়ারী ১৯৭২ সাল থেকে ২০২৫ পর্যন্ত প্রফেসর ড. এম.এ. সাত্তার এ দেশের পরিবেশ বিজ্ঞান জগতে এক সুবিখ্যাত শিক্ষাবিদ, বিজ্ঞানী, গবেষক, উদ্ভাবক ও আবিস্কারক যা তার গত ৫৩ বৎসর (১৯৭২—২০২৫) দিনরাত শ্রম মেধা দক্ষতার ফসল যা তাকে এদেশের পরিবেশ বিজ্ঞান জগতে শিক্ষা, গবেষণা, উদ্ভাবন, আবিস্কার, প্রকাশনা, সচেতনতা ও প্রচারণায় পাইওনিয়ার বা জনকের আসনে অধিষ্ঠিত করছে যা শতাধিকবার তার সিভি বা পরিচিতি প্রকাশনায় মৌলিক স্বীকৃতিতে চলে আসছে। এখানে পরিবেশ বিজ্ঞানে তার খ্যাতি, পরিচিতি ও কাজকর্মের সংক্ষিপ্ত চিত্র তোলে ধরা হলো যাতে কারো অবমূল্যায়নে না এসে এদেশ ও জাতির পরিবেশ বিজ্ঞানে পাইওনিয়ার (জনক) বলতে বা বুঝতে বা বুঝাতে সমস্যা হয়।
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Saltwater intrusion into freshwater sources has emerged as a critical public health concern in the coastal regions of Bangladesh, with profound implications for adolescent health and well-being. This study investigates the health consequences of coastal water exposure among school-going adolescents in Kalapara Upazila of Patuakhali district-a region highly affected by saline intrusion due to climate change, sea-level rise, and inadequate freshwater infrastructure. A total of 250 adolescents were surveyed using a semi- structured questionnaire to assess the prevalence of waterborne, water-washed, and water-related diseases. The results reveal that a significant proportion of adolescents suffer from waterborne illnesses such as cholera (91.36%), dysentery (87.74%), and typhoid (80.62%). Additionally, high rates of skin-related issues and gastrointestinal disorders were reported. The findings indicate a strong association between water quality and adolescent health in coastal environments. These insights can serve as critical evidence for public health authorities, educators, and policy-makers to design context-specific interventions aimed at ensuring access to safe water and improving hygiene practices. The study underscores the urgency of strengthening water infrastructure and health education to protect vulnerable adolescent populations in coastal Bangladesh.
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