The large number of publications in the field of extraction, purification, modification, and process optimization of natural dyes and their application on textiles demonstrates the revival of natural dyes on textile coloration. The use of natural dyes is growing in popularity because of the quality of the natural dyestuff obtained, the environmental compatibility of the dyes and the substantial...

LLE Review, Volume 73 59 Ever since cholesteric liquid crystals (CLC’s) were discovered in 1888,1 CLC colors have been noted for their qualitative vividness and luminosity;2 however, there have been few quantitative colorimetric studies examining CLC’s as colorants. We will describe how CLC’s produce color, what colorimetric studies have been done on them, and how we have extended and improved ...

Organic colorants of textiles found in the female burial Lieto Ristinpelto, SW Finland, were analyzed by HPLC-PDA. The textiles’ visible colors varied from different brownish shades to blueish, greenish, and reddish hues. aim chromatographic analysis was deepen current understandings dyes used Finland at transition between 12th 13th centuries AD, i.e., beginning local Medieval period, contribut...

One of the most promising applications of chitosanase is the conversion of chitinous biowaste into bioactive chitooligomers (COS). TKU033 chitosanase was induced from squid pen powder (SPP)-containing Bacillus cereus TKU033 medium and purified by ammonium sulfate precipitation and column chromatography. The enzyme was relatively more thermostable in the presence of the substrate and had an acti...