摘要:

AbstractA pair of hybrids were produced by alternative crossbreeding of waxy maize with amylo‐waxy maize which had double recessive genes, amylose extender (ae) and waxy (wx). Investigation of the starches proved that they did not coincide with waxy starches. Hidden amylose extender genes also participated in the starch produced in the endosperm of hybrid maize. Amylo‐waxy starch looks promising as a new material of food indus

ISSN:0038-9056    

DOI:10.1002/star.19780300502

出版商:WILEY‐VCH Verlag GmbH    

年代:1978

数据来源: WILEY

摘要:

AbstractA general analysis of Egyptian varieties of lentil seeds and some foreign varieties was carried out. The starch was first quantitatively separated and purified from the seeds and its yield was determined. The amylose and amylopectin, viscosity, chain length and glucoamylase effect were determined.

ISSN:0038-9056    

DOI:10.1002/star.19780300503

出版商:WILEY‐VCH Verlag GmbH    

年代:1978

数据来源: WILEY

摘要:

AbstractEs wurden sechs native Stärken im Brabender‐Viskographen verkleistert und unter genau definierten Bedingungen im Autoklaven bei 120 °C verschieden lange dispergiert. Die so erhaltenen kolloiden Lösungen wurden zusätzlich noch mit NaOH‐Lösungen dispergiert. Wir konnten feststellen, daß bei längerem thermischen Dispergieren die Molekulargewichte und pH‐Werte – mit Ausnahme der Amylosestärke – stark fallen. Durch Laugenzusatz vermindert man in den Kleistern und thermisch dispergierten Lösungen die Molekulargewichte der Stärken noch weiter. Aus den Resultaten unserer Untersuchungen kann man folgern, daß thermisches Dispergieren in der ersten Erwärmungsphase bis 120°C hauptsächlich die assoziierten Moleküle desaggregiert. Bei weiterem Dispergieren bei 120 °C folgt die thermische Degradation der Makromoleküle und hydrolytische Einwirkung der entstandenen Produkte mit sauren Eigenschaften. Dies gilt besonders für die Amylo

ISSN:0038-9056    

DOI:10.1002/star.19780300504

出版商:WILEY‐VCH Verlag GmbH    

年代:1978

数据来源: WILEY

摘要:

AbstractThe effect of nature of substituent groups on the stability and mode of decomposition of amylose derivatives has been studied. Kinetics of decomposition of amylose phenyl acetate, amylose tosylate and amylose phthalate have been investigated using the thermogravimetry (TG) and differential thermal analysis (DTA) in nitrogen atmosphere. TG data are analyzed using the methods ofChatterjee, andAndersonandFreemanwhile DTA data are analysed using the method ofReich.TG thermograms of all the amylose derivatives studied show the characteristic sigmoidal curves and the evaluation of kinetic parameters from them indicates that the major decomposition reaction follows almost first order kinetics. The nature of substituent groups in amylose derivatives plays an important role on the stability and following order of stability has been noted: amylose palmitate>amylose acetate>amylose propionate>amylose phenylacetate>amylose benzoate>amylose>NaCMA>amylose succinate>amylose phthalate>amylose tosylate.

ISSN:0038-9056    

DOI:10.1002/star.19780300505

出版商:WILEY‐VCH Verlag GmbH    

年代:1978

数据来源: WILEY

摘要:

AbstractTwo groups of α‐amylase isoenzymes have been identified in germinated wheat, but only one group would adsorb on to undamaged starch granules. This group represented 84.2% of the total α‐amylase activity. The non‐adsorbing isoenzymes were electrophoretically identical to the α‐amylases of immature w

ISSN:0038-9056    

DOI:10.1002/star.19780300506

出版商:WILEY‐VCH Verlag GmbH    

年代:1978

数据来源: WILEY

摘要:

AbstractThe addition of magnesium sulfate to xanthation mixtures of crosslinked starch aided isolation, scaleup and room‐temperature product stability on storage. Pilot‐plant scaleup of laboratory‐developed procedures also yielded water‐insoluble products effective in removing heavy metals from water. Several different processing methods are presented to show the ease of preparation and use of the p

ISSN:0038-9056    

DOI:10.1002/star.19780300507

出版商:WILEY‐VCH Verlag GmbH    

年代:1978

数据来源: WILEY

ISSN:0038-9056    

DOI:10.1002/star.19780300508

出版商:WILEY‐VCH Verlag GmbH    

年代:1978

数据来源: WILEY

ISSN:0038-9056    

DOI:10.1002/star.19780300509

出版商:WILEY‐VCH Verlag GmbH    

年代:1978

数据来源: WILEY

ISSN:0038-9056    

DOI:10.1002/star.19780300511

出版商:WILEY‐VCH Verlag GmbH    

年代:1978

数据来源: WILEY

ISSN:0038-9056    

DOI:10.1002/star.19780300514

出版商:WILEY‐VCH Verlag GmbH    

年代:1978

数据来源: WILEY