Vegetative tissue

Acids such as sulfuric, hydrochloric, nitric, and especially hydrofluoric as well as strong alkaUes such as caustic soda and caustic potash are extremely corrosive to animal and vegetable tissue. Extreme caution must be taken to prevent skin contact, inhalation, or ingestion. Violent reactions may occur when dissolving or diluting many of these chemicals with water. 

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. 

Betalains are water-soluble nitrogen-containing pigments responsible for the red and violet (betacyanins class) and yellow (betaxanthins class) colors found in many flowers, fruits, and occasionally in vegetative tissues of plants of most families of the Caryophyllales order (except the Caryophyllaceae and Molluginaceae families, which have anthocyanins instead)." ... 

In previous papers it was shown that the enzymatic pool of Pectolyase Y23 possesses high catalytic efficiency either as free or immobilized form in solution of pectins [28, 29] and of fresh vegetable tissues [30]. According to Baldwin and Pressor [31] the following enzymatic activities were detected in the preparation PL, PG and PE. The amount of the different enzyme detected per mg of Pectolyase Y23 and the main enzyme characteristic are quoted in Table 1... 

Bacteria occur normally in fresh fruit and vegetable tissues. A wide variety of microorganisms have been found on fresh fruits and vegetables, which include mesophilic bacteria, lactic acid bacteria, coliforms, and yeasts and molds (Nguyen-The and... 

A rapid digestion of vegetable tissue with nitric-perchloric acid mixture was followed by ETAAS using ammonium hydrogen phosphate as matrix modifier. Recovery of Pb was complete at the ppm level with RSD < 4%47. 

Lazarides, H.N., Gekas, V., and Mavroudis, N. 1997. Apparent mass diffusivities in fruit and vegetable tissues undergoing osmotic processing. J. Food Engineer. 31, 315-324. 

PM seems to occur in small amounts in the vegetative tissues of all higher and lower plants investigated. It is very abundant in the tomato fruit,60 orange flavedo and albedo,21 the tobacco plant,61 eggplant62 and alfalfa it usually occurs in the commercial fungal pectinase preparations that are manufactured for the clarification of fruit juices.25 In the natural products in which the enzyme is found, the major portion of it is usually strongly adsorbed on the water-insoluble cellular components of the tissue macerates.60 62 68... 

Lipids from liquid samples or cell suspensions may be extracted directly into organic solvents but solid samples will require prior treatment, such as homogenization or ultrasonication. The solvents are chosen with reference to the nature of the lipids present and to some extent, the type of sample, e.g. animal or vegetable tissue. Ethanol-diethyl ether (3 1) with subsequent extraction... 

R. A. Heacock, and M. E. Mahon Ergot-type Alkaloids in Vegetative Tissue of Rivea corymbosa (L.) Hall. f. Phytochemistry 2, 99 (1963). 

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