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University of Agricultural Sciences, Bengaluru

University of Agricultural Sciences Bangalore, a premier institution of agricultural education and research in the country, began as a small agricultural research farm in 1899 on 30 acres of land donated by Her Excellency Maharani Kempa Nanjammanni Vani Vilasa Sannidhiyavaru, the Regent of Mysore and appointed Dr. Lehmann, German Scientist to initiate research on soil crop response with a Laboratory in the Directorate of Agriculture. Later under the initiative of the Dewan of Mysore Sir M. Vishweshwaraiah, the Mysore Agriculture Residential School was established in 1913 at Hebbal which offered Licentiate in Agriculture and later offered a diploma programme in agriculture during 1920. The School was upgraded to Agriculture Collegein 1946 which offered four year degree programs in Agriculture. The Government of Mysore headed by Sri. S. Nijalingappa, the then Chief Minister, established the University of Agricultural Sciences on the pattern of Land Grant College system of USA and the University of Agricultural Sciences Act No. 22 was passed in Legislative Assembly in 1963. Dr. Zakir Hussain, the Vice President of India inaugurated the University on 21st August 1964.

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19991
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Subject: Textile and Apparel Designing × Author: GANDHAD, ROOPA S. × End date: 1999 × Start date: 1993 × Type: Thesis × Thesis Type: M.Sc ×
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    ThesisItemOpen Access
    EFFECT OF BLEACHING AGENTS ON NATURALLY COLOURED COTTON YARNS
    (UNIVERSITY OF AGRICULTURAL SCIENCES GKVK BANGALORE, 1999-09-09) GANDHAD, ROOPA S.; NAIK, SHAILAJA D.
    The present study entitled effect of bleaching agents on naturally coloured cotton yarns was carried out during 1997-98 at Dharwad with the objective to study the effect of scouring, bleaching, mercerisation on naturally coloured cotton yarns. Three brown coloured namely Dharwad light brown hirsutuni (DLBH-95-1), Dharwad medium brown hirsutum (DMBH- 95-1), Dharwad dark brown hirsutum (DDBH-95-1) and one Dharwad green hirsutum (DGH-95-1) were selected for the study. The experiment was carried out at yarn stage included treating the yarns with scouring agents namely soda ash (Sj), a mild alkali and a mixture of soda ash and caustic soda (S2), u strong alkali. Bleaching was carried out for Sj and S2 scoured genotypes with calcium hypochlorite, hydrogen peroxide, sodium hydrosulphite and sunlight separately. On scouring, bleaching and mercerisation the single yarn strength and colour change was assessed using computer colour matching system under daylight, tungsten, tubelight-83 and tubelight-84 illuminations. Scouring increased the single yarn strength and colour of all the genotypes. However, higher improvement in the single yarn strength was evident on 83 scouring where as maximumimprovement on colour was on Sj scouring when assessed under all the light illuminations. Sunlight bleaching increased the single yarn strength of all the brown genotypes and reduced the strength of green genotype. Bleaching resulted in the fading of colour of all the genotypes however, they appeared darker than the control. All the selected naturally coloured cotton genotypes bleached unevenly with calcium hypochlorite and further it reduced hue intensity of coloured cottons. There was minimal fading of the colour on sodium hydrosulphite bleaching and was moderate with hydrogen peroxide and sunlight bleaching. Mercerisation did increase the single yarn strength and colour of all the selected naturally coloured cotton genotypes.