Citrullus vulgaris

Aziridine 269 (Scheme 3.98), on treatment with pyrazole (270) and subsequent TFA deprotection, gave P-pyrazolylalanine 271, first isolated from Citrullus vulgaris (a water melon) and isosteric with histidine [148]. Treatment of 269 with 1,2,4-ox-adiazolidine-3,5-dione 272 gave (S)-quisqualic acid (273), an active ingredient of the ancient Chinese drug Shihchuntze, an anthelmintic made from the seeds of Quisqualis indica [148]. 

Pyrazol-1 -ylalanine, an isomer of histidine, was isolated from Citrullus vulgaris (watermelon) seed and its structure was confirmed by comparison with synthetic material 107). It was the major free amino acid in the dormant dry seed but was present in only trace amounts in vegetative tissue. While present in seed extracts of other members of the Cucurbitaceae, it has not been identified as occurring in members of other plant families. 

Chenopodium quinoa (quinoa) Citrullus vulgaris (watermelon) Cucurbita pepo (pumpkin)... 

Citrullus vulgaris Schrad. China Cucurbitacins, carprylic acid, capric acid, lauric acid, myristic acid, palmitic acid, stearic acid, oleic acid, linoleic acid, citrulline.50 For alcoholic poisoning, diabetes, nephritis, sore throat, stomatitis, demulcent. 

Citrullus vulgaris, Lemna minor, Phaseolus vulgaris, Raphanus sativus Asarum canadense, Aristolochia clematitis, A. serpentaria Artemisia annua Morns alba... 

Citrullus vulgaris Leaf discs sinking disc technique19... 

Watermelon Seed Seeds Citrullus vulgaris Southern Asia... 

Watermelon. Arbuse. Citrullus vulgaris Schrad., Cucurbitaceae. cultivated in hot and temperate zones rhe world over. Contains diuretic principles Bliss et al. Am. J. Pharm. 105, 53 (1933) Roby et al. ibid. Ill, 68 (1939). 

More recently, the total volatile composition of distilled cucumbers was investigated by a number of groups (2, ). The steam volatile con unds of muskmelons fCucumis melo) have also received attention (, , 6,) as have those of watermelons (Citrullus vulgaris) (7.) The most striking feature in the volatile con onents of all these fruits is the variety and magnitude of the nine-carbon compounds. These compounds include nonanol, nonanal, various nonenols, nonadienols, nonenals and nonadienals. 

Reddy V.L., Reddy H.K.Y., Reddy P.A.L. and Reddy V.S.O. Wine production by novel yeast biocatalyst prepared by immobilization on watermelon (Citrullus vulgaris) rind pieces and characterization of volatile compounds. Process Biochemistry 43 (7) (2008) 748-752. 

The ornithine cycle [Eq. (8)-(ll)] was proposed by Krebs and Henseleit (1932) to explain urea formation from ammonium derived from amino acid catabolism in the mammalian liver. Since the promulgation of the ornithine cycle was partly based on the natural occurrence of citrulline in juice of the watermelon Citrullus vulgaris) (Wada, 1930), it is not surprising that citrulline is an intermediate in arginine formation in higher plants. 

Most of the evidence suggests that the enzymes are newly synthesized, though in the majority of cases rigorous proof is unavailable. Enzyme development in a number of seeds is prevented by inhibitors of protein and/or RNA synthesis. For example, dipeptidase and isocitrate lyase development in Cucurbita maxima [92, 105] are suppressed by protein synthesis inhibitors, while actinomycin D, which inhibits some DNA-dependent RNA synthesis, prevents the increase in lipase and isocitrate lyase of castor beans [14, 77]. Studies with inhibitors can be criticized on several grounds especially since these chemicals may have previously unsuspected side effects. But more satisfactory evidence of the kind known for barley aleurone layers has been found in some seeds. De novo synthesis of isocitrate lyase in cotyledons of Citrullus vulgaris (watermelon) [52] and of endopeptidase in mung bean [21 a] have been shown to occur by means of density-labelling experiments with D2O. 

Citrullus vulgaris (water melon) 14, 145, 208, 212, 270 Citrus 13 Clarkia 109,110 Clarkia elegans 109 Coconut see Cocos nucifera Cocos nucifera (coconut)... 

Kemp, T. R. Identification of Some Volatile Compounds from Citrullus vulgaris. Phytochem. 14, 2637 (1975). 

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