Havacıva grass used in this study is one of the natural plants and belongs to genus Alkanna family Boraginaceae. strigosa Boiss. & Hohen. plant known as Havaco or Havaciva region. In study, dyes derived from root plant, which was introduced a new record for Turkey 2017, given. As result different colors with without mordant were obtained. A total 9 dyeings made research using dried wet grass. S...

Dermal contamination from products such as pesticide formulations may be measured by adding a fluorescent dye as a tracer, and photographing the glow of the dye on the skin under ultraviolet light. The Fluorescence Interactive Video Exposure System (FIVES) fluorescence monitor, developed at the Health and Safety Laboratory, uses calibrations of intensity of glow against surface concentration of...

In this paper, a total of fourteen dye extracts from different plants’ parts (flowers and fruits) were extracted. Absorbance light by with 5%, 10% 20%concentrationsweremeasured using UV-Vis spectrophotometer at wavelengths. A system linear equations in terms wavelength absorbance without film thickness was developed solved MATLAB software. Also, optical energy bandgap (Eg) obtained experimental...