http://nopr.niscpr.res.in/handle/123456789/32557 2026-10-08T20:26:17Z http://nopr.niscpr.res.in/handle/123456789/32610 Title: Estimation of tannin in jute and allied fibres Authors: Ghosh, B S; Chakrabarti, S K; Kundu, A B; Ghosh, B L Abstract: A simple method for the extraction of tannin from lignocellulosic fibre and its assay by a colorometric procedure has been described. It has been found that the acid-soluble lignin or lignin monomeric compounds do not interfere in the colorimetric assay reaction. Page(s): 84-85 1990-06-01T00:00:00Z http://nopr.niscpr.res.in/handle/123456789/32609 Title: <span style="font-size:11.0pt;line-height:115%; font-family:"Calibri","sans-serif";mso-ascii-theme-font:minor-latin;mso-fareast-font-family: Calibri;mso-fareast-theme-font:minor-latin;mso-hansi-theme-font:minor-latin; mso-bidi-font-family:"Times New Roman";mso-ansi-language:EN-US;mso-fareast-language: EN-US;mso-bidi-language:AR-SA">Synthesis and dyeing characteristics of tetrahydrobenzo[<i>b</i>]thiophene-2-bisazo(-2-naphthols and -4-N,N-dialkylanilines)</span> Authors: Rangnekar, D W; Chitale, R S Abstract: <span style="font-size:11.0pt;line-height:115%; font-family:" calibri","sans-serif";mso-ascii-theme-font:minor-latin;mso-fareast-font-family:="" calibri;mso-fareast-theme-font:minor-latin;mso-hansi-theme-font:minor-latin;="" mso-bidi-font-family:"times="" new="" roman";mso-ansi-language:en-us;mso-fareast-language:="" en-us;mso-bidi-language:ar-sa"="">Eight bisazo disperse dyes. 3-cyano- and 3-carbethoxy-4,5,6, 7-tetrahydrobenzo[<i>b</i>]thiophene-2-bisazo(-2-naphthols and -4-N,N-dialkylanilines), were prepared and their dyeing performance on polyester was assessed. The dyeings on polyester had bright red brown and red shades with good to excellent pick-up, low light fastness and fair to good sublimation fastness.</span> Page(s): 81-83 1990-06-01T00:00:00Z http://nopr.niscpr.res.in/handle/123456789/32608 Title: Synthesis and dyeing characteristics of mono- and bis-azo-4-hydroxy- 1-methyl-2-quinolones Authors: Rangnekar, D W; Jhaveri, P V Abstract: <span style="font-size:11.0pt;line-height:115%; font-family:" calibri","sans-serif";mso-ascii-theme-font:minor-latin;mso-fareast-font-family:="" calibri;mso-fareast-theme-font:minor-latin;mso-hansi-theme-font:minor-latin;="" mso-bidi-font-family:"times="" new="" roman";mso-ansi-language:en-us;mso-fareast-language:="" en-us;mso-bidi-language:ar-sa"="">Seventeen 3- and 6-substituted mono- and bis-azo-4-hydroxy-1-methyl-2-quinolones were prepared and their dyeing performance on polyester fibre was assessed. The dyeings on polyester had yellow, orange, red brown and violet shades with good pick-up, low light fastness and excellent sublimation fastness.</span> Page(s): 76-80 1990-06-01T00:00:00Z http://nopr.niscpr.res.in/handle/123456789/32607 Title: <span style="font-size:11.0pt;line-height:115%; font-family:"Calibri","sans-serif";mso-ascii-theme-font:minor-latin;mso-fareast-font-family: Calibri;mso-fareast-theme-font:minor-latin;mso-hansi-theme-font:minor-latin; mso-bidi-font-family:"Times New Roman";mso-ansi-language:EN-US;mso-fareast-language: EN-US;mso-bidi-language:AR-SA">Synthesis and dyeing characteristics of 3-arylazo-8-nitro-2,4-disubstituted-pyrimido[1<i>,</i>2-<i>a</i>]benzimidazoles</span> Authors: Rangnekar, D W; Puro, S S Abstract: <span style="font-size:11.0pt;line-height:115%; font-family:" calibri","sans-serif";mso-ascii-theme-font:minor-latin;mso-fareast-font-family:="" calibri;mso-fareast-theme-font:minor-latin;mso-hansi-theme-font:minor-latin;="" mso-bidi-font-family:"times="" new="" roman";mso-ansi-language:en-us;mso-fareast-language:="" en-us;mso-bidi-language:ar-sa"="">Nine monoazo disperse dyes, 3-arylazo-8-nitro-2,4-dioxo- and 2,4-bis(morpholino/piperidino)- pyrimido[1,2-<i>a</i>]benzimidazoles, and three monoazo disperse reactive dyes, 3-arylazo-2,4-dicbloro-8-nitropyrimido[1,2-<i>a</i>]benzimidazoles were prepared and their dyeing performance on polyester and polyamide was assessed. The dyeings on polyester had yellow shades with low pick-up, moderate light fastness and good sublimation fastness and the dyeings on polyamide had orange shades with low pick-up and moderate light fastness.</span> Page(s): 73-75 1990-06-01T00:00:00Z