Green Black

There are two manganese(II) sulfides, MnS and MnS2. Manganese(II) disulfide contains a S—S bond and has a pyrite stmcture. When a solution of a manganous salt is treated with ammonium sulfide, a flesh-colored hydrated precipitate is formed which is comprised of MnS and Mn(II)S2. This mixture very slowly changes to the mote stable green-black MnS. 

Potassium sodium copper chlorophyllin (chiorophyllin—copper complex)—A green-black powder obtained from chlorophyll by replacing the methyl and phytyl ester groups with alkaH and replacing the magnesium with copper. The source of the chlorophyll is dehydrated alfalfa. 

Inlay waxes are generally dark blue, green, black, or purple however, inlay waxes for acryflc work are uncolored and are a natural ivory. The waxes are generally produced in stick form, about 75 mm long and 6.5 mm across the cross section may be round or hexagonal. 

Methyl-l-phenyl-3-pyrazolin-5-one gives a green-black dye (736) with 4-nitroso- or 4-amino-dimethylaniline and silver chlorides in the presence of light, a process of great importance in colour photography (B-76MI40403). 

Vanadium Pollution control, e.g. removal of hydrogen sulphide and in manufacture of sulphuric acid Respiratory irritation green-black tongue (transient)... 

Identify each pair of relationships among the -OH groups in glucose (red-blue, red-green, red-black, blue-green, blue-black, green-black) as cis or trails. 

A green-black SO complex (dec. 155°C) with a bent Ir—S-O linkage has been synthesized (Figure 2.82) [145]. 

MXj Black solid Green-black solid Black-green crystal Black solid... 

External coil problems White calcium carbonate CaC03 Phosphate scale from threshold agents. Blue/green/black copper phosphate trihydrate Cu3(P04)2 3H20 Dirt pockets due to low level of coil. BW sludgei settles on external fins. Gasket weeping from inhibitor. Color stains from inhibitor dyes. 

The differences in types of tea are due not to the variety of the tea, but rather to the tea processing. The same basic tea leaves can produce green, black or oolong teas, although some varieties of tea leaves are more suited to certain types of tea. So-called herbal teas are produced from mixtures of flowers, berries, peels, seeds, leaves and roots from many different plants. They are quite different from tea. However, combinations of these herbal materials and tea leaves are also present in the market. 

NAKABAYASHI T (1991) Chemical compounds in tea , in Nakabayashi T, Ina K and Sakada K, Chemistry and Functions of Green, Black and Oolong Teas, Kawazahi, Japan, Koogaku Press Ltd, 20-42. 

FERNANDEZ P L, MARTIN M J, GONZALEZ A G, PABLOS F (2000) HPLC determination of catechins and caffeine in tea. Differentiation of green, black and instant teas, Analyst, 125,421-5. 

The Fe " " complex of the linear hexadentate A, A, 5 ,iS ,A, A -coordinating ligand derived from l,8-diamino-3,6-dithiaoctane and pyrrole-2-aldehyde has been synthesized and characterized, especially by Mossbauer spectroscopy.The hexadentate tripodal NsSs-donor triazamacrocyclic ligands (196) and (197) give brown-violet and green black Fe complexes, respectively the former is predominantly high-spin, the latter predominantly low-spin. In the complex of (1 the Fe—N bond distances are between 2.06 A and 2.08 A, Fe—S between 2.269(3) A and 2.288(3) A. ... 

Engelhard , U.H., Lakenbrink, C., and Lapczynski, S., Antioxidative phenolic compounds in green/black tea and other methylxanthine containing beverages, ACS Symp. Ser., 754, 111, 2000. 

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