Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
Results
Showing 1 to 7 of 7 for “"Coloring Matters"”.
-
Certain coloring matters derived from vanallin and methyl salicylate
… of this investigation was to prepare a number of coloring matters by condensing vanillin with para-methoxyacetophenone, meta-nitroacetophenone, and para-bromoacetophenone, and to prepare another group by condensing methyl salicylate with acetophenone, para-methoxyacetophenone, …
-
An experimental investigation of coloring matter in flowers of vinca major
… though early man did not know the nature of coloring matter in flowers, he used the coloring matter as dye for centuries. There are a variety of reasons for the interest of chemists in natural and artificial coloring matters. One of these is the color pleasure, anothe1· is the commercial …
-
Coloring matter in camillia japonica flowers
<p>The coloring matter in flowers has been used for centuries as a dye. Early man did not know the chemical nature of these coloring matters. Recent investigations have shown that the dark pigments whereas the lighter pigments of flowers are in the anthoxanthin group of pigments. Both of these …
-
Condensation of terephthalaldehyde and hydroxyacetophenones
<p>Organic pigments were the source of coloring matters used by man until comparatively recent times. It is to be presumed that the first steps in the use of these pigments no dyes resulted from the accidental staining of the skin or fabric by a vegetable material. Prehistoric man, in order to …