A COMPARATIVE STUDY ON THE EFFECT OF LIQUOR RATIO OF ACID AND NEUTRAL(POWDER) ENZYME ON DENIM GARMENTS

Young people as well as older people have now great passion for the denim cloth. Today jeans are available in many colors and designs. In this study we tried to reveal the difference in between two types of cellulase enzymes acid and neutral (powder) enzyme. To do this, denim samples were collected and prepared according to the recipe of equal amount of enzyme by varying the liquor ratio. Basically there were no differences found in between acid and powder enzyme on different fastness properties like rubbing, washing, perspiration, light fastness test. But there was a significant difference in weight loss%. Acid enzyme exhibited little bit more enzymatic effect than powder enzyme and it also showed more weight loss % . But the neutral enzyme required less money rather than acid enzyme and no need to control pH, easy to use. Moreover, lower liquor ratio gave higher abrasion. Acid enzyme gave more back staining than neutral enzyme

Design and Development of a Power Operated Sunflower Thresher

Sunflower production is increasing in Bangladesh, but farmers face problems separating the seeds from the sunflower heads. Sunflowers are traditionally threshed by beating the heads manually with a stick. The goal of this experiment is to design and develop a motor-driven machine that separates the seeds from the sunflower. An orthographic projection was drawn using SolidWorks 2016 software. The sunflower threshing machine was then fabricated according to the drawing in the FMPE Divisional workshop using locally available materials in 2017-18. The developed sunflower threshing machine was modified in 2018-19. The improved model was further modified to reduce the overall dimensions while maintaining the same capacity of the machine. The number of threshing rollers was reduced from 5 to 4. A threshing fan has been added to the improved version to separate the dust from the grains. The capacity of the motorized sunflower thresher was 115 and 304% higher than that of the pedal thresher and manual threshing, respectively. The capacity of the thresher was varied with moisture content. The capacity of the thresher varied from 89 to 125 kg/h at moisture content from 31 to 62% (wb). [J Bangladesh Agril Univ 2022; 20(3.000): 289-294

Psychological disorders among college going students: A post Covid-19 insight from Bangladesh

The COVID-19 pandemic has been found to result in adverse effects on both the physical and mental well-being of individuals. The adolescent population emerged as one of the most susceptible cohorts affected by the ongoing pandemic. They experienced significant adversity due to various mental health conditions. The objective of this study was to evaluate the present prevalence rates of depression, anxiety, and internet addiction among college-going students in Bangladesh following the post-COVID period. The study involved a cohort of 7667 students. A cross-sectional study was conducted to evaluate the levels of depression, anxiety, and internet addiction among college-going adolescents. The assessment utilized the Patient Health Questionnaire (PHQ-9), Generalised Anxiety Disorder (GAD-7), and Young's Internet Addiction Test (IAT) scales. The data was analyzed using the Pearson chi-square test and binary logistic regression. Participants averaged 15.3 years old and 64.3 % female. 63 % of students fulfilled the criterion for internet addiction, 37 % did not, 75 % met depression criteria, 25 % did not, and 60 % met anxiety requirements. Girls were more depressed and anxious than boys. Boys were more internet-addicted than girls. Social media usage from COVID-19, daily exercise, online courses, and financial concerns throughout the pandemic affected participants' mental health. Still, the students were suffering from internet addiction, depression, and anxiety after COVID-19. Early identification and intervention may lessen these difficulties' influence on adolescents' academic and personal lives. Colleges may provide mental health services, encourage healthy lives, and educate on mental health

Design and evaluation of a power tiller vegetable seedling transplanter with dibbler and furrow type

Vegetable production plays a vital role in ensuring food security in Bangladesh. However, the majority of vegetable seedlings are currently transplanted manually, which is not only time-consuming but also labor-intensive and costly. In this context, a semi-automated transplanter can be considered as an alternative solution for mechanized seedling transplanting. To mechanize seedling operations, two types of transplanters were designed, fabricated and tested: the power tiller-operated semi-automatic dibbler vegetable seedling (DVS) transplanter and the furrow opener vegetable seedling (FVS) transplanter. The goal was to evaluate their performance and impact on field crop productivity. In the DVS transplanter design, the larger sprocket was adjusted to enhance the precision of hole-making by pressing the dibbler into the soil, creating holes where seedlings would be transplanted. On the other hand, the FVS transplanter utilized a furrow opener to create furrows, and the seedling is placed in these furrow at a specific distance from the furrow opener wall, where the distance between seedlings within the furrow could be adjusted based on the specific requirements of the seedling crop. The results of the evaluation indicated that both transplanters successfully planted seedlings without any missing placements, while hole covering was achieved at 115 and 118.2% for the DVS and FVS transplanters, respectively. The field capacity and field efficiency for both transplanters were determined to be 0.05 ha h−1 and 61.18%, respectively, with a coefficient of variation of 5% or less. Field tests conducted with brinjal crops at a forward speed of 1.2 km h−1 and a spacing of 0.7 × 0.6 m demonstrated that both designs yielded higher yield productivity compared to manual transplantation. Additionally, no issues related to vegetative development were observed. Both transplanters exhibited promising performance and significant potential in terms of accurately transplanting seedlings, and ensuring satisfactory transplantation quality. Furthermore, these transplanters offer several advantages, including less time-consuming, lower labor demands and even distribution of seedlings. This design encourages small to medium-level farmers seeking to engage in mechanized vegetable farming practices