Potatoes sweet

Sweetness evaluation Sweetness potency Sweet n Low Sweet potato Sweet potatoes Sweetzyme Swelling Swimmingpool Swimming p o ols... 

Lupine seed, though used primarily in animal feeds (see Feeds AND FEED ADDITIVES), does have potential for use in human appHcations as a replacement for soy flour, and is reported to contain both trypsin inhibitors and hemagglutenins (17). The former are heat labile at 90°C for 8 minutes the latter seem much more stable to normal cooking temperatures. Various tropical root crops, including yam, cassava, and taro, are also known to contain both trypsin and chymotrypsin inhibitors, and certain varieties of sweet potatoes may also be impHcated (18). 

Naphthalene acetic acid is used to thin apple and pear blossoms and to control apple and pear preharvest drop (10). It also is used to induce flowering in pineapple, but conversely inhibits sprouting in potatoes, sweet potatoes, and turnips (Brassica rapd) (23). It also is used to promote rooting in... 

Other products having natural color that varies enough to make standardization of their color desirable include the shells of certain kinds of nuts, the skins of red and sweet potatoes, and ripe oHves. 

A comparison of the drying curves for lyophilized and unlyophilized sweet potatoes is shown in Figure 7. It is seen that the same and constant loss of weight (8.2%) was reached with the lyophilized samples at both 60° and 70° C. No such indication is shown by the unlyophilized samples at either temperature. 

Figure 7. Drying Curves for Lyophilized and Unlyophilized Sweet Potatoes at 60° and 70° C. (27)...

One of the more recent innovative approaches was to look for new micro-organisms and novel carbohydrate substrates. The early fermentations used sugar beet or cane molasses, various syrups, sweet potato starch or glucose itself and the micro-organism was always an Aspergillus spp. In the early 1930 s it was found that yeasts would produce dtric add from acetate. Since then a variety of yeasts, prindpally Candida spp., has been shown to convert glucose, w-alkanes or ethanol to dtric add with great effidency. 

Koji process The use of the Koji process is very restricted and apart from this paragraph, it will not be discussed further. The substrates are either starch or the residue of sweet potatoes which are placed in shallow trays. Water is added to a 70% weight ratio. Steaming of... 

Vegetables Carrots Lima beans Fbtatoes Radishes oinach Sweet potatoes Tomatoes... 

Garlic, sweet potato, wheat, barley, sunflower, bean (mung), sesame, lupine, strawberry, artichke (Jerusalem), bean (kidney), bean (lima), groundnut/peanut Moderately sensitive (1.0-2.0ppm)... 

Thompson NP, Bardalaye PC, Waddill VH. 1979. Residue of endosulfan on sweet potato. Proceedings of the Elorida State Horticultural Society 92 115-116. 

Another interesting furan is ipomeamarone (39), a stress metabolite produced by sweet potatoes when they are attacked by fungi. 

Hehre and coworkers showed that beta amylase from sweet potatoes, an inverting, a-specific exo-(l 4)-glucanase, catalyzes the hydrolysis of jS-maltosyl fluoride with complex kinetics which indicated the participation of two substrate molecules in the release of fluoride ion. Furthermore, the reaction was strongly accelerated by the addition of methyl ) -maltoside. Hydrolysis of a-maltosyl fluoride, on the other hand, obeyed Michaelis-Menten kinetics. The main product with both a- and yj-maltosyl fluoride was )S-maltose. The results with )3-maltosyl fluoride were interpreted by the assumption of a glycosylation reaction preceding hydrolysis by which a malto-tetraoside is formed by the replacement of fluoride ion by a second substrate molecule or added methyl -maltoside (see Scheme 5). 

Sweet potato 10-22600 Inclnded because of breeding programmes to increase (3-carotene ... 

Some cultivars of sweet potatoes for human consumption are also good sources of P-carotene since their contents can achieve 218 pg/g as in cultivar Acadian (Table 4.2.1). Although separation of cis isomers was not carried out in the later study, small amounts of 13-c -p-carotene were found in fresh sweet potatoes of an unspecified cultivar, whereas no cis isomers of P-carotene were found in this fresh vegetable in other studies. ... 

Among thermal processes, canning caused the largest trans-to-cis isomerization of provitamin A carotenoids, increasing the total cis isomers by 39% for sweet potatoes, 33% for carrots, 19% for collards, 18% for tomatoes, and 10% for peaches 13-di-P-carotene was the isomer formed in highest amonnts. ... 

Ahneida, L.B. and Penteado, M.V.C., Carotenoids and provitamin A value of some Brazilian sweet potato cultivars (Ipomoea batatas Lam.), Rev. Farm. Bioquim. Univ. S. Paulo, 28, 145, 1992. 

Peonidin is even less widespread in frnits and vegetables, being detected in amonnts higher than 10% of the total anthocyanin content in only 4 of 44 frnits listed in Table 4.3.1, in sweet potatoes and in purple com cv. Morado. It was found as one of the principal anthocyanidins in cv. Cabernet Franc," cv. Rubi-... 

Most of the anthocyanins acylated with caffeic acid have this cinnamyl moiety linked to a glucosyl position 6, as in gooseberries, some grape cultivars, ° " ° black carrots, red cabbage,red radishes," and sweet potatoes. Some anthocyanins isolated from species of potatoes have a caffeyl group located at position 4 of the rhamnosyl unit of the rutinose disaccharide. " ... 

Among the hydroxycinnamic acids, anthocyanins acylated with sinapic acid are not widespread in foods they have been isolated only in black carrots " and red cabbages." Anthocyanins that are acylated with p-hydroxybenzoic acid were only found in black carrots " and sweet potatoes. This acyl group was located within the 6 position of a glucoside moiety. 

Odake, K. et al.. Chemical strnctures of two anthocyanins from purple sweet potato, Ipomoea batatas. Phytochemistry, 31, 2127, 1992. 

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