Browsing by Author "Khan, A."

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A Nationwide Cross-Sectional Survey of the Prevalence of and Association of Physical Activity With Suicidal, Psychosocial and Health-Risk Indicators Among Adolescents in Bangladesh
(John Wiley and Sons Inc, 2024-12-10) Khan, M.; Ali, M.; Sayma, Ganesan, B.; Abdullahi, A.; Hasan, S.; Khan, A.; Hawlader, M.; Winser, S.
Purpose: This study investigated the associations between physical activity (PA) and suicidal behaviours, psychosocial outcomes and indicators of health risks. Methods: This was a secondary analysis of data from the Global School-Based Student Health Survey (GSHS) database. A total of 2058 adolescents aged 11–17 years in Grades 7–10 completed a self-administered questionnaire. Sex-stratified logistic regression was used to evaluate the associations between PA and suicidal behaviours, psychosocial outcomes and indicators of health risks. We used the least absolute shrinkage and selection operator (LASSO) regression to test whether PA-related factors predicted suicidal, psychological and lifestyle-related behaviours. A generalized linear mixed model (GLMM) examined the contributions of PA to these factors. Findings: Half of the adolescents (18.9% boys and 30.3% girls) indicated satisfactory PA per the World Health Organization guidelines. The most active group in terms of frequency of activity and walking or bicycling to school was positively associated with suicidal behaviour. Isolated adolescents reported anxiety despite frequent PA. Reduced frequency of PA was significantly associated with sexual activity, smoking, tobacco product use (girls), alcohol abuse (boys) and other drug use (boys and girls). The LASSO revealed that different PA-related factors predicted suicidal, psychological and lifestyle-related behaviour among girls and boys. The GLMM showed a significant contribution of PA to selected predictors. Conclusion: Increased PA may lower suicidal behaviour among adolescents. The most physically active groups were associated with predictors that varied by sex; boys were bullied, whereas girls experienced physical abuse.
Identification and characterization of shiga toxin-producing escherichia coli in hospitalized acute diarrhea cases and in cattle in Kolkata, India[abstract]
(2001-09) Das, S.C.; Khan, A.; Ramamurty, T.; Yamasaki, S.; Sikandar, A.; Bhattacharya, S.K.; Nair, G.B.; Takeda, Y.
Infantile diarrhoea associated with sorbitol-fermenting, non-shiga toxin-producing Escherichia coli O157:H-
(2003) Chakraborty, S.; Khan, A.; Kahali, S.; Faruque, S.M.; Yamasaki, S.; Ramamurthy, T.
Sustainable Coloration and Functionalization of Silk Fabric Through Chinese Fringe Leaves (Loropetalum chinense) Extraction Using the Taguchi Method: An Alternative for Waste Managemen
(Korean Fiber Society, 2025-01-26) Hossain, M.S.,; Islam, S.R.; Zhou, Y.; Khan, A.; Saeed, H.A.M.
The escalating concern over the environmental impact of synthetic dyes in the textile industry has fueled a burgeoning interest in natural alternatives. This study aims to investigate the dyeing performance of silk fabric using dye extracted from Chinese fringe leaves (Loropetalum chinense), which are devoid of harmful chemicals, and to promote eco-friendly practices. The extraction process involved normal heating with crushed leaves, ensuring a purely natural dyeing method. Through experimentation, it was observed that higher dyeing temperatures, increased dye ratios, and longer dyeing durations enhanced color strength in the silk fabric treated with the Chinese fringe leaves dye. An orthogonal (L16) Taguchi method was applied to determine the optimal dyeing conditions, emphasizing the significance of dye dosage and temperature in achieving maximum color strength. The initial parameter of K/S was 11.3 and the predicted parameter of K/S was 11.43, where the confirmation test value of K/S was 11.49 for the dyed fabric sample. Moreover, assessments of color fastness demonstrated satisfactory results ranging from good to excellent for washing, perspiration, rubbing, and light fastness. Fourier transform infrared analysis elucidated the interaction between dye molecules and silk fabric while scanning electron microscopy revealed the dye absorption by the silk fabric's surface. Thermogravimetric analysis revealed differences in thermal properties between dyed and undyed silk fabric, with dyed fabric exhibiting lower melting points and reduced thermal stability. Additionally, the dyed silk fabric exhibited decreased air permeability of 122 ± 2 mm/s with an increased protection factor of 317.9 against UV and sun rays compared to its undyed silk fabric sample. In inference, the dye extracted from Chinese fringe leaves possessed a favorable affinity for silk fabric, presenting a promising alternative to synthetic dyes for sustainable coloration and functionalization in the textile industry.