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Aunt Caroline Dye died on September 26, 1918, in Newport, Arkansas. [ 1][ 4][ 2] Her gravestone says that she was 108 years old when she died. Her farmland and rental properties amassed her a substantial amount of wealth, especially for a Black woman with no formal education in the South. [ 2][ 3] A probated will filed on August 15, 1918 ...
Infobox references. Haematoxylin or hematoxylin ( / ˌhiːməˈtɒksɪlɪn / ), also called natural black 1 or C.I. 75290, is a compound extracted from heartwood of the logwood tree ( Haematoxylum campechianum) [1] [2] with a chemical formula of C. 16H. 14O. 6.
Dye. Drying colored cloth. Chemical structure of indigo dye, the blue coloration of blue jeans. Although once extracted from plants, indigo dye is now almost exclusively synthesized industrially. [1] A dye is a colored substance that chemically bonds to the substrate to which it is being applied. This distinguishes dyes from pigments which do ...
Azo dyes are organic compounds bearing the functional group R−N=N−R′, in which R and R′ are usually aryl and substituted aryl groups. They are a commercially important family of azo compounds, i.e. compounds containing the C-N=N-C linkage. [1] Azo dyes are synthetic dyes and do not occur naturally. [2] [3] Most azo dyes contain only one ...
[64] [65] The Greeks imported indigo dye from India, calling it indikon, and they painted with Egyptian blue. Blue was not one of the four primary colours for Greek painting described by Pliny the Elder (red, yellow, black, and white). For the Romans, blue was the colour of mourning, as well as the colour of barbarians.
The supermassive black hole at the core of Messier 87, here shown by an image by the Event Horizon Telescope, is among the black holes in this list. This is an ordered list of the most massive black holes so far discovered (and probable candidates), measured in units of solar masses (M ☉), approximately 2 × 10 30 kilograms.
Brilliant Black BN, Brilliant Black PN, Brilliant Black A, Black PN, Food Black 1, Naphthol Black, C.I. Food Black 1, or C.I. 28440 is a synthetic black diazo dye. It is soluble in water. It usually comes as tetrasodium salt. It has the appearance of solid, fine powder or granules. Calcium and potassium salts are allowed as well.
Amido black 10B is an amino acid staining azo dye used in biochemical research to stain for total protein on transferred membrane blots, such as the western blot. [2] It is also used in criminal investigations to detect blood present with latent fingerprints - it stains the proteins in blood a blue-black color. [3]