Browsing by Author "Rajni Kumari"
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ThesisItem Open Access Competency and attitude of postgraduate students towards online education system during covid-19 era(CCS HAU, Hisar, 2022-07) Rajni Kumari; Santosh RaniCOVID-19, the infectious disease caused by a novel strain of corona virus was declared a global pandemic on 20th March, 2020 in India and has affected almost every aspect of human life. The corona virus pandemic has been declared by World Health Organization (WHO) on 11th March, 2020. Two colleges of university including I.C. College of Home Sciences and College of Agriculture were selected for conducting research on “Competency and attitude of postgraduate students toward online education system during Covid-19 Era”. The study targeted the post graduate agricultural students who were attending the online classes during the Covid-19 pandemic to meet out the objectives of investigation. A proportionate sample of 120 postgraduate students have been selected randomly for the study, 60 students each from I.C. College of Home Sciences and College of Agriculture, CCS HAU, Hisar, Haryana. two set of independent (16 variables) and one set of dependent (3 variables) variables were selected for the present investigation. Majority of the students in both of the college were in the age group 21– 23 years, residing in semi-urban area, had medium sized (5-6 members) nuclear type of families and having medium family education status scored between 4.2 to 5.3. The main occupation of most of their families was agricultural farming. Technological competency of all the students were found high with score range 3.39-4.19. Average score of WMS of 15 statement by COHS and COA were found 3.35 and 3.36, respectively. While social competency of all the students were found medium with score range 2.62- 3.38. Average score of WMS of 10 statement by COHS and COA were found 2.62 and 2.76, respectively. Attitude of all the respondents towards e- learning requirement was found high with score range 3.39- 4.19. Average score of WMS of 8 statement by COHS and COA were found 3.69 and 3.70, respectively. Attitude of all the respondents towards e- learning concept was found high with score range 3.39-4.19. Average score of WMS of 11 statement by COHS and COA were found 3.71 and 3.80, respectively. Attitude of all the respondents towards reasons for using e- learning was found high with score range 3.39-4.19. Average score of WMS of 10 statement by COHS and COA were found 3.43 and 3.47, respectively. It is observed that in case of conducive factors all the students had ranked 1st to social factors, ranked 2nd financial factors and ranked 3rd technical factors. Similarly in case of limiting factors also all the students had ranked 1st to social factors, ranked 2nd technical factors and ranked 3rd to miscellaneous factors studied.ThesisItem Restricted Development and application of flame retardant finish on cotton fabric for household use(Punjab Agricultural University, Ludhiana, 2017) Rajni Kumari; Grewal, SumeetThe present study was conducted to develop a flame retardant finish for cotton casement and poplin fabrics and to develop textile products for household use, using the finished fabrics. To test the durability of the finish wash fastness was evaluated and to maintain the durability, a laundry procedure was optimised. The flame retardant finish was developed by using the chemical Tetrakis (hydroxymethyl) phophoniun chloride (THPC) along with citric acid as binder and sodium hypophosphite as catalyst. The optimisation of pH, concentration of binder, concentration of catalyst and concentration of THPC was done by testing the effects of the finish at different variables on physical properties- tensile strength, flexural rigidity, thickness, GSM and whiteness index. The flammability was tested using Vertical Flammability tester. The results showed that for casement fabric, pH 7, binder concentration 10%, 0.75% concentration of catalyst and 30% concentration of THPC were considered optimum. On the other hand for the poplin fabric pH 8, binder concentration 8%, 0.75% concentration of catalyst and 40% concentration of THPC were considered optimum. At these conditions tensile strength decreased and flexural rigidity increased but in permissible limits. It was found that the developed finish was semi-durable and would last for 15-20 washing cycles. The optimised laundry procedure suggested that the flame retardant casement and poplin fabrics should be washed with non-ionic detergent with 2gm/L concentration at 25oC temperature to maintain its durability till 15-20 home launderings. The flame retardant fabrics were used for making household textile products such as kitchen apron, mitten, napkins and curtain.ThesisItem Open Access Studies on enrichment of X chromosome bearing spermatozoa in buffalo bull semen(LUVAS, 2018) Rajni Kumari; Trilok NandaSex pre-selection has a significant economic impact in livestock industry. Density gradient centrifugation might be an approach to sexing spermatozoa because of the additional DNA content and volume of X chromosome bearing spermatozoa head. The objective of present study was to develop an appropriate density gradient model for enriching X chromosome bearing spermatozoa population in semen of buffalo bull. Density gradient centrifugation (DGC) technique was employed for enriching X chromosome spermatozoa in buffalo bull semen. DGC was carried out using 4 gradient medias viz., Percoll, Optiprep, Ficoll and Sucrose. Pooled semen samples of Murrah buffalo bull were subjected to a total of 24 DGC models (six models per gradient media- based on the density range , number of layers and speed of centrifugation(g) used), swim-up (SU) technique and simple washing in five replicates. The percentage enrichment of X chromosome bearing spermatozoa in all the DGC models was determined by SYBR green based Real Time PCR. Statistical analysis revealed that number of layers and centrifugation speed (g) factors in a density gradient centrifugation model, have significant effect on the percentage enrichment of X chromosome content in semen samples.Three layers, four layers and five layers density gradient centrifugation models showed significant differences (P<0.05) in the sex ratio towards X spermatozoa population in semen (61.72%±0.81, 64.55%±0.26 and 67.31±0.33%) respectively. Density gradient centrifugation models with centrifugation speed (g) 200x g and 300x g also showed significant differences (P<0.05) in the sex ratio towards X spermatozoa population in semen (66.36%±0.25 and 62.69±0.22%) respectively. Based on the results of percentage X enrichment by 24 different density gradient media models, Optiprep DGC model with five layers and centrifugation speed of 200xg was found to yield maximum enrichment (72.4%±1.38). Present study demonstrates that, Optiprep density gradient model with 5 layers and centrifugation at 200xg can be considered as a promising model for enrichment of X spermatozoa from buffalo bull semen based on percentage X enrichment and viability characteristics.