Category: Color
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Evans blue
T-1824 or Evans blue, often incorrectly rendered as Evan’s blue, is an azo dye that has a very high affinity for serum albumin. Because of this, it can be useful in physiology in estimating the proportion of body water contained in blood plasma. It fluoresces with excitation peaks at 470 and 540 nm and an emission peak at 680 nm. Evans blue dye has been used as a viability assay on…
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p-Phenylenediamine (PPD) is a derivative of aniline used in kevlar, hair dye and henna substitutions among other things, the derivatives of which are used in antiozonants among other horrors
p-Phenylenediamine (PPD) is an organic compound with the formula C6H4(NH2)2. This derivative of aniline is a white solid, but samples can darken due to air oxidation.It is mainly used as a component of engineering polymers and composites like kevlar. It is also an ingredient in hair dyes and is occasionally used as a substitute for henna. Production PPD is produced via three routes. Most commonly, 4-nitrochlorobenzene is treated…
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The rich man and Lazarus aka the parable of Dives and Lazarus
The rich man and Lazarus (also called the parable of Dives and Lazarus) is a parable of Jesus from the 16th chapter of the Gospel of Luke. Speaking to his disciples and some Pharisees, Jesus tells of an unnamed rich man and a beggar named Lazarus. When both die, the rich man goes to Hell and implores Abraham to send Lazarus from his side in Heaven to warn the rich…
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Pluteus is a large genus of fungi with over 300 species
Pluteus is a large genus of fungi with over 300 species. They are wood rotting saprobes with pink spore prints and gills that are free from the stem. Etymology The Latin word Pluteus means shed or penthouse. Characteristics of the Pluteus genus are: Pluteus is separated from Volvariella due to the lack of a volva, and from Entoloma by growing on wood and by microscopic features (Entolomas have angular spores). Naming The name Pluteus was established in 1837 by the founding…
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Phthalo blue
Copper phthalocyanine (CuPc), also called phthalocyanine blue, phthalo blue and many other names, is a bright, crystalline, synthetic blue pigment from the group of phthalocyanine dyes. Its brilliant blue is frequently used in paints and dyes. It is highly valued for its superior properties such as light fastness, tinting strength, covering power and resistance to the effects of alkalis and acids. It has the appearance of a blue powder,…
