454 research outputs found
Preparation and characterization of ramie fiber reinforcement on acrylonitrile butadiene styrene/cassava starch hybrid bio-composites / Basanta Kumar Behera
No full textThe rising demand for materials that can be sustained over time and the growing worries about the decline of the environment have resulted in a noteworthy rise in the attention towards environmentally friendly composites in recent times. This study aims to develop a bio-composite by reinforcing ramie fiber (RF) within the ABS/CS blend matrix, to enhance the mechanical characteristics and biodegradability. The surface roughness of the fibers increased by chemical treatment using sodium hydroxide (NaOH). The ABS/CS/RF composites underwent compounding through a two-roll mill, and sheets containing different weight percentages (5, 10, 15, 20) of RF were produced using a hot compression molding machine. The prepared composites were tested to evaluate their biodegradability, water absorption, mechanical properties, and viscoelastic characteristics. The biodegradation test results demonstrated that there was a positive correlation between the concentration of fibers in neat ABS and the degree of biodegradation. The tensile strength and modulus of the ABS/CS blend increased by 60% and 14.28% respectively. The impact strength improved by 117% when 20 wt% of the RF was added. The degradation of the ABS/CS/RF composite increased by 1.375% after 45 days. However, the DMA results showed an adverse effect on the storage modulus
The influence of graphite filler on the viscoelastic and mechanical characteristics of PC/ABS hybrid composite for automotive applications / Basanta Kumar Behera ... [et al.]
No full textThis work aims to enhance the viscoelastic and mechanical properties of the neat Polycarbonate/Acrylonitrile Butadiene Styrene (PC/ABS) blend by incorporating graphite filler. Thermoplastic composites were prepared with PC/ABS as the matrix and graphite powder as fillers of 3, 6, and 9 wt% by injection molding. The influence of graphite particulate on the mechanical properties of PC/ABS/graphite composite was studied through tensile strength, tensile modulus, percentage elongation, impact strength, flexural strength, and modulus. The results show a 20% improvement in the tensile and flexural modulus of the PC/ABS/graphite composite compared to the neat PC/ABS blend. However, the tensile strength and percentage elongation were reduced by 11.64% and 29.63%, respectively. The storage modulus with 9 wt% of graphite in the PC/ABS blend has the highest modulus over the entire temperature range compared to the neat PC/ABS blend. The addition of graphite filler to the PC/ABS blend increased the tensile, flexural, and storage modulus, even though some mechanical attributes were compromised. The viscoelastic, mechanical, and thermal properties were enhanced by adding graphite as a filler to help plastic product designers design plastic products for automobile applications
STUDY OF TREATMENT OF FRACTURE SHAFT OF LONG BONE OF LOWER LIMB IN CHILDREN BY TITANIUM ELASTIC NAIL (TENS)
No full textOUTCOME OF COMMINUTED MIDDLE THIRD CLAVICULAR FRACTURE TREATED WITH OPEN REDUCTION AND INTERNAL FIXATION WITH PLATING
No full textThe Addition of Polytetrafluroethylene (PTFE) and Graphite on Acrylo Nitrile Butadiene Styrene (ABS) and Its Effects on Mechanical and Tribological Characteristics
No full textHeat Shock Proteins (Hsps) in Cellular Homeostasis: A Promising Tool for Health Management in Crustacean Aquaculture
No full textHeat shock proteins (Hsps) are a family of ubiquitously expressed stress proteins and extrinsic chaperones that are required for viability and cell growth in all living organisms. These proteins are highly conserved and produced in all cellular organisms when exposed to stress. Hsps play a significant role in protein synthesis and homeostasis, as well as in the maintenance of overall health in crustaceans against various internal and external environmental stresses. Recent reports have suggested that enhancing in vivo Hsp levels via non-lethal heat shock, exogenous Hsps, or plant-based compounds, could be a promising strategy used to develop protective immunity in crustaceans against both abiotic and biotic stresses. Hence, Hsps as the agent of being an immune booster and increasing disease resistance will present a significant advancement in reducing stressful conditions in the aquaculture system
Evaluation of impact of an integrated lecture method of teaching among undergraduate medical students, compared to traditional didactical lectures in reference to antenatal care
No full textBackground: In traditional lecture method of teaching most of the time there is time consumption, duplication and overlapping of topics taught in the MBBS course. Integration (both horizontal and vertical) of subjects improves the cognitive and psychomotor domains of students to enhance their skills to correlate clinically to obtain an accurate diagnosis.Methods: The present study comprised of 96 students of 3rd semester MBBS course. A pretested questionnaire was given to study their existing level of knowledge and attitude regarding antenatal care. The students were divided into two groups by simple random method - a study group of 48 students, who receive integrated teaching including didactic lectures, case studies and live demonstrations by department of Community Medicine and Obstetrics and Gynaecology, whereas the control group of 48 students received only didactic lectures. Post test was conducted after 3 days. The mean knowledge and attitude scores of pre-test and post-test of the two groups were analyzed by using Z- test.Results: In the post test, the mean knowledge score between traditional and integrated groups were 12.40 and 14.46 respectively with standard deviation of 1.869 and 1.864. Whereas the mean values of attitude is 36.95 and 60.00 with standard deviation of 1.972 and 1.977. There was a significant improvement in both knowledge and attitude of students of integrated group as compared to traditional group (P<0.001).Conclusions: Integrated method of teaching was found to be more effective than traditional lecturing method.</jats:p
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