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Assam Agricultural University, Jorhat

Assam Agricultural University is the first institution of its kind in the whole of North-Eastern Region of India. The main goal of this institution is to produce globally competitive human resources in farm sectorand to carry out research in both conventional and frontier areas for production optimization as well as to disseminate the generated technologies as public good for benefitting the food growers/produces and traders involved in the sector while emphasizing on sustainability, equity and overall food security at household level. Genesis of AAU - The embryo of the agricultural research in the state of Assam was formed as early as 1897 with the establishment of the Upper Shillong Experimental Farm (now in Meghalaya) just after about a decade of creation of the agricultural department in 1882. However, the seeds of agricultural research in today’s Assam were sown in the dawn of the twentieth century with the establishment of two Rice Experimental Stations, one at Karimganj in Barak valley in 1913 and the other at Titabor in Brahmaputra valley in 1923. Subsequent to these research stations, a number of research stations were established to conduct research on important crops, more specifically, jute, pulses, oilseeds etc. The Assam Agricultural University was established on April 1, 1969 under The Assam Agricultural University Act, 1968’ with the mandate of imparting farm education, conduct research in agriculture and allied sciences and to effectively disseminate technologies so generated. Before establishment of the University, there were altogether 17 research schemes/projects in the state under the Department of Agriculture. By July 1973, all the research projects and 10 experimental farms were transferred by the Government of Assam to the AAU which already inherited the College of Agriculture and its farm at Barbheta, Jorhat and College of Veterinary Sciences at Khanapara, Guwahati. Subsequently, College of Community Science at Jorhat (1969), College of Fisheries at Raha (1988), Biswanath College of Agriculture at Biswanath Chariali (1988) and Lakhimpur College of Veterinary Science at Joyhing, North Lakhimpur (1988) were established. Presently, the University has three more colleges under its jurisdiction, viz., Sarat Chandra Singha College of Agriculture, Chapar, College of Horticulture, Nalbari & College of Sericulture, Titabar. Similarly, few more regional research stations at Shillongani, Diphu, Gossaigaon, Lakhimpur; and commodity research stations at Kahikuchi, Buralikson, Tinsukia, Kharua, Burnihat and Mandira were added to generate location and crop specific agricultural production packages.

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20211
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Subject: Textile and Apparel Designing × Author: Gogoi, Saradi Jyotsna × End date: 2022 × Start date: 2021 × Thesis Type: Ph.D ×
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    ThesisItemOpen Access
    Coating mulberry (Bombyx mori) silk fabric with fibroin based nanoparticles
    (2021) Gogoi, Saradi Jyotsna; Baruah, Bulbul
    Textile industries in 21st century was experiencing the benefits of nanotechnology in multiple fields of application. Nanotechnology overcomed the limitation of traditional process and technology by incorporating many functional properties such as fabric softness, durability, breathability, antimicrobial, water repellency, fire retardancy, ultra violet protection properties etc., to the textile world. It dealt with those properties of materials which could change incredibly when the particle size of the material had fall below approximately 100nm. Application of conventional method to the fibre, yarn or fabric would lose their function and comfort gradually while wearing or laundering. But imparting of nanotechnology to fibre, yarn or fabric would provide resistance to functional properties because, nano particles have large surface area to volume ratio and high surface energy. Coating of mulberry silk fabric with fibroin based nanoparticles would help in protecting skin as well as the mulberry silk fabric from the harmful UV rays. Further the life of fibroin coated mulberry silk might increase due to UV protection. Therefore, an attempt had been made to coat mulberry silk fabric with fibroin based nanoparticles from muga silk. The present research work was carried out on, ―Coating mulberry (Bombyx mori) silk fabric with fibroin based nanoparticles‖ With the following objectives: 1. To coat mulberry silk fabric with fibroin based muga nano particles. 2. To expose the fibroin coated mulberry silk fabric in UV light chamber. 3. To assess the properties of mulberry silk fabric before and after fibroin nano coating. Two sources for coating mulberry silk fabric namely fibroin from muga silk and zinc oxide were selected for the study. Synthesis of fibroin nanoparticles, coating method, fibroin concentration and zinc oxide concentration were optimized. During coating in all the processes material to liquor ratio (1:20) was kept constant. Coating method, fibroin concentration and zinc oxide concentration were optimized, based on the UPF value obtained from the test sample before and after coating. The coated mulberry silk fabric with fibroin and fibroin + zinc oxide indicated very good protection against UV radiation with UPF value 50.78 and 77.19, respectively. The other important properties of coated samples were also very satisfactory. The properties like tensile strength, air permeability, wicking height, stiffness, thickness, crease recovery angle of coated samples decreased due to coating, which was negligible. For example, the tensile strength of controlled sample was 22.28 kgf and 34.60 kgf in warp and weft respectively whereas only fibroin coated sample increased its strength 7.02% in warp direction and 15.58% in weft direction. But the fibroin + zinc oxide coated sample showed decreased strength in warp direction (13.20 kgf) and increased strength in weft direction (53.60 kgf). Air permeability was related to comfort property of fabric. In the present investigation air permeability of controlled sample is 0.102 KPaS/m where as fibroin coated fabric showed 0.094 KPaS/m and fibroin + zinc oxide coated fabric showed 0.073 KPaS/m. It could be confirmed that, these nano particles coating did not affect the comfort property of the fabric. Besides these, wash durability of coated fabric was also found to be good. Fibroin coated samples could resist UPF up to 10 washings and fibroin + zinc oxide coated silk fabric could resist UPF up to 15 washings. Hence, from the study it was found that, fibroin and fibroin + zinc oxide could be effectively used for coating mulberry silk fabric. It protected the mulberry silk fabric as well as our skin from the harmful ultraviolet radiation.