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Wurster blue

Wurster blue finds use as a redox indicator in the oxidase test and is also used in electron transport chain analysis; it is capable of donating electrons to cytochrome C.

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Xanthohumol

Xanthohumol is a prenylated chalcone from hops and beer. It has a range of biological properties with potential therapeutic utility.

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Xanthosine

Xanthosine is a nucleoside derived from xanthine and ribose.

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Xanthotoxol

Xanthotoxol ,is a biologically active linear furocoumarin that can decrease the contractile force and the spontaneous beats. The inotropic and chronotropic action of Xanthotoxol may be related to inhibiting Ca 2+ influx from outside the cells and Ca 2+ release from calcium reservoir inside the cells.

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Xanthurenic Acid

Xanthurenic acid is a chemical shown to induce gametogenesis of Plasmodium falciparum, the parasite that causes malaria. It is found in the gut of the Anopheles mosquito. It is a metabolic intermediate that accumulates and is excreted by pyridoxine deficient animals after the ingestion of tryptophan.

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Xantocillin

Xantocillin was the first reported natural product found to contain the isocyanide functional group. It was first isolated from Penicillium notatum by Westling in 1950 and subsequently from several other sources.

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Xenon Difluoride

Xenon Difluoride is a powerful fluorinating agent with the chemical formula XeF2,and it is one of the most stable xenon compounds.Xenon difluoride is a dense, white crystalline solid.Xenon difluoride is a linear molecule.Xenon Difluoride is also used as an isotropic gaseous etchant for silicon, particularly in the production of microelectromechanical systems, (MEMS).

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Xenotime

Xenotime is a rare earth phosphate mineral, the major component of which is yttrium orthophosphate (YPO4). It forms a solid solution series with chernovite-(Y) (YAsO4) and therefore may contain trace impurities of arsenic as well as silicon dioxide and calcium. Xenotime is used chiefly as a source of yttrium and heavy lanthanide metals (dysprosium, ytterbium, erbium and gadolinium). Occasionally, gemstones are also cut from the finer xenotime crystals.Xenotime has two directions of perfect prismatic cleavage and its fracture is uneven to irregular (sometimes splintery). It is considered brittle and its streak is white. The refractive index of xenotime is 1.720-1.815 with a birefringence of 0.095 (uniaxial positive). Xenotime is dichroic with pink, yellow or yellowish brown seen in the extraordinary ray and brownish yellow, grayish brown or greenish brown seen in the ordinary ray.

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Xylan

Xylan is a group of hemicelluloses that are found in plant cell walls and some algae. Xylans are polysaccharides made from units of xylose (a pentose sugar). Xylans are almost as ubiquitous as cellulose in plant cell walls and contain predominantly β-D-xylose units linked as in cellulose.Xylan is one of the foremost anti-nutritional factors in common use feedstuff raw materials.

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Xylene Cyanol

Xylene cyanol can be used as a colour marker to monitor the process of agarose gel electrophoresis and polyacrylamide gel electrophoresis.

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