摘要:

AbstractThe conditions for obtaining an accurate and reproducible assay of hydroxyethyl and hydroxypropyl substituents in the corresponding polysaccharide derivatives are described. Suitable compounds for standardising the procedure are described.

ISSN:0038-9056    

DOI:10.1002/star.19720241102

出版商:WILEY‐VCH Verlag GmbH    

年代:1972

数据来源: WILEY

摘要:

AbstractStarch granules were separated from whole or peeled tubers of immature sweet potatos harvested on the 40th day after planting, and classified according to their size into two groups, the one being of suspensible fine size (av. 1.7∼1.8 μ), apt to be swept away in industrial starch manufacturing, the other of sedimentary size (av. 4.7 μ).In comparison with the sedimentary starch granules, both samples of the suspensible granules were shown to have higher amylose contents and less X‐ray diffraction intensities, and to be remarkable for containing such large quantities of embraced fatty acids as those of grain starches. The most part of the embraced fatty acids of the suspensible granules was composed of palmitic acid, the role of which being disc

ISSN:0038-9056    

DOI:10.1002/star.19720241103

出版商:WILEY‐VCH Verlag GmbH    

年代:1972

数据来源: WILEY

摘要:

AbstractInfluence of Clearing Agents and their Amount on Polarimetric Determination of Potato Starch According to Ewers.According to the results of chemical analysis and its statistical evaluation the Carrez clearing agent at an amount of 1 ml appears to be the most suitable for determination of starch in potatos. Use of sodium molybdate or ammonium molybdate led to lower values in average. Among these two sodium molybdate, as during examination of starch samples, appeared more suitable than ammonium molybdate. Phosphortungstic acid proved the least suitable. Normal as well as basic lead acetate after Horn did not show fully clear results upon revision. This is why they were not used.

ISSN:0038-9056    

DOI:10.1002/star.19720241104

出版商:WILEY‐VCH Verlag GmbH    

年代:1972

数据来源: WILEY

摘要:

AbstractTamarind kernel powder has been fractionated by aqueous extraction and by complexing with copper to afford three fractions I—III. Fraction I contains sizable amounts of proteinous matter whereas fractions II and III are almost pure polysaccharides. Methylation of fraction III followed by hydrolysis produces 2,3,5‐tri‐O‐methyl‐L‐arabinose (1 mole); 2,3,4‐tri‐O‐methyl‐D‐xylose (1 mole); 2,3,4,6‐tetra‐O‐methyl‐D‐galactose (1 mole); 2,3,6‐tri‐O‐methyl‐D‐glucose (1 mole); 3,4‐di‐O‐methyl‐D‐xylose (1 mole); and 2,3‐di‐O‐methyl‐D‐glucose (3 moles). The structure of the p

ISSN:0038-9056    

DOI:10.1002/star.19720241105

出版商:WILEY‐VCH Verlag GmbH    

年代:1972

数据来源: WILEY

摘要:

AbstractSeveral hydroxypropyl oligoglucoses were detected in the faeces of rats on diets containing hydroxypropyl starches with degrees of substitution varying from 0.025–0.106. The major components were tentatively identified as hydroxypropylmaltose, dihydroxypropylmaltotriose, and dihydroxypropylmaltotetraose. The digestibility of the hydroxypropyl starches was found to decrease with increasing degree of substitutio

ISSN:0038-9056    

DOI:10.1002/star.19720241106

出版商:WILEY‐VCH Verlag GmbH    

年代:1972

数据来源: WILEY

摘要:

AbstractProcessing Properties of Local Maize. 3. Direct Saccharification.The corn grits obtained by dry degermination of 15 grades of corn grown in West Germany were subjected to direct enzymatic saccharification. In comparison with two overseas corn grades, the suitability for hydrolysis of the starch contained in the lowfat grit products has been investigated. Two‐step enzymatic hydrolysis with bacterial alpha‐amylase and glucoamylase was preceded by a steeping extraction with SO2water to remove undesired soluble corn components.Although from the technological point of view results cannot be regarded as optimum, it was demonstrated that the starch of domestic corn grades is as suitable for hydrolysis or even more suitable than overseas grades. It was also found that the lowfat products of the medium‐early grades permit a larger starch turnover and, consequently, larger sugar yields than that of the medium‐late grades although the average starch content of the latter was

ISSN:0038-9056    

DOI:10.1002/star.19720241107

出版商:WILEY‐VCH Verlag GmbH    

年代:1972

数据来源: WILEY

摘要:

AbstractAbsorption of SO2During Swelling of Maize. 3. Influence on the Microflora.In order to gain insight into the micro‐biological conditions during maize starch production the change in micro‐biological germ content of the following products has been examined in three different plants: – Maize before entering the steep tanks and after the end of the steeping process, – Starch suspension before and after the hydrocyclone station as well as before entering the centrifuge, – Wet starch during its discharge from the centrifuge and before entering the drier, – Dry starch after discharge from the drier.It was shown that the number of microorganism remaining in the starch does not solely depend on piloting of the steeping process. Increase of germ number respectively infections at certain stages of production seem to be essential causes for micro‐biological contamination of maize starch. Place and degree of this increase of germ number depend on the respective technolo

ISSN:0038-9056    

DOI:10.1002/star.19720241108

出版商:WILEY‐VCH Verlag GmbH    

年代:1972

数据来源: WILEY

ISSN:0038-9056    

DOI:10.1002/star.19720241109

出版商:WILEY‐VCH Verlag GmbH    

年代:1972

数据来源: WILEY

ISSN:0038-9056    

DOI:10.1002/star.19720241110

出版商:WILEY‐VCH Verlag GmbH    

年代:1972

数据来源: WILEY

ISSN:0038-9056    

DOI:10.1002/star.19720241112

出版商:WILEY‐VCH Verlag GmbH    

年代:1972

数据来源: WILEY