Peach, gum

These are some examples of the use of i.r. spectra in the analysis and identification of carbohydrates in foods and natural products. Very often, these spectroscopic techniques are complementary to others, such as the study of aldobiouronic acids obtained by hydrolysis of peach-gum polysaccharides by their optical rotations and their i.r. spectra.100 However, the i.r. results appear to be sufficiently reliable to be used in the detection of traces of fructose and glucose, and to determine the d.e. (dextrose equivalent) of corn syrups, as well as the quantitative carbohydrate content in different products.101... 

P. persica (3,39) Peach gum China ca. 2000 B.C., spread to India about 1000 B.c. and then to Europe [Watt (39)1 Peach or nectarine these bear no permanent botanical separation. 

Preparation 35). Mesquite gum, from a plant Prosopis juliflora and related species) common in the southwestern United States, and cherry gum are utilized. Mesquite gum consists of L-arabinose, D-galactose, and 4-0-methyl-D-glucuronic acid in combination, and cherry gum in addition has some D-xylose and D-mannose. By controlled hydrolysis most of the pentose is removed without hydrolyzing the other constituents to any great extent. The L-arabinose is then partially purified by dialysis 36) or ion-exchange procedures 37) and crystallized from ethyl alcohol. Wheat and rye bran, peach gum, Australian black wattle gum, and spent beet pulp have been utilized for the preparation of L-arabinose. 

Kardosova A, Rosik J, Kubala J, Kovacik V 1979 Structure of neutral oligosaccharides from the enzyme hydrolysate of polysaccharide of peach gum (Prunus persica (L.) Batsch). Coll Czech Chem Commun 44 2250-2254... 

The commonest pentoses are L-arabinose, found in the arabans of gum arabic, cherry gum, and peach gum T>-xylose, from the pentosans of straw, bran, and wood D-n 6ose, from nucleic acid. 

Damage Larvae bore beneath bark of peach trees at the base as well as into main roots near the surface. Also may attack plum, prune, cherry, apricot, and nectarine trees. Trees are often girdled. Burrow entrance holes exude gum mixed with sawdustlike material. Young or weak trees may be seriously damaged or killed older trees are less affeeted. 

Powdered Locust Bean Gum Type D-200] Powdered Locust Bean Gum Type D-300, Powdered Locust Bean Gum Type P-10(f, Powdered Locust Bean Gum Type PP-100. See Locust bean (Ceratonia siliqua) gum Powdered peach pits. See Peach (Prunus persica) pit powder... 

CioHigO, 282.247 Isol. from partial acid hydrolysates of peach, Cholla Opuntia fulgida), Opuntia ficus-indica (Indian fig) and Virgilia oroboides gums. 

Gum arabic (gum acacia) (55-55), black wattle gum (55), egg plum gum, almond tree gum, and peach tree gum Aspen wood 90) y corn-cobs 91)y Western hemlock 91a)... 

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