Der Einfluß der Lipidkomplexe auf das Backverhalten von Weizen

The Effect of Lipid Complexes on the Baking Behaviour of Wheat Adding of lipids in the bread baking has been very important in the last years. The quality of bread can be improved by interactions between the lipids and other components of wheat flour. In spite of many experiments, which have been published in this field, the effect of lipids on the baking quality of flour has not been well established. This study deals with the effect of lipids, lipid-protein-complexes and lipid-starch-complexes on the baking quality of wheat flour. The results showed that high concentrations of lecithin improved the baking quality, while low concentrations decreased the loaf volume. The gliadin with its high content of polar lipids is very effective in increasing loaf volume and improving crumb characteristics. Also gliadin, which is isolated from gluten with 70% ethanol has the same effect. The gliadins with identical composition isolated from gluten, with different concentrations of ethanol, were differently effective on the loaf volume. The gliadins with high lipid content were more effective than gliadins with traces of lipids in increasing the loaf volume. The extracted lipids from gliadin were comparatively effective as gliadin in increasing the loaf volume, while the defatted protein has decreased the loaf volume. The glutenin has an adverse effect on the baking quality of flour. The lipid-starch-complexes neutralize the negative effect of the addition of gelatinized starch. This is due to the presence of some lipids not bound in these complexes.     

Der Einfluß der Emulgatoren auf das Emulsionssystem von Cremes

Influence of Emulsifiers on the Emulsion System of Creams Besides the usual emulsion systems (o/w and w/o) a further ambiphilic mixed system is described. The occurrence of an ambiphilic system was characterized by various experimental measures. A series of experiments on the utilization of active ingredients is described. The properties of a few creams derived from the basis laid by DAB, wherein the emulsifiers are substituted by creams, are discussed under special consideration of the emulsifying system. The determination of micro-penetration was carried out by which the consistency can be quantitatively expressed.     

Einfluß der adsorption von 3-N-alkylaminopropan-1-olen auf das zetapotential von polymeroberflächen

The principle of a measuring system for the determination of ζ-potentials of polymer sheets is described. On sheets of poly(tetrafluoroethene) and homopolystyrene characteristic differences of the ζ-potential after absorption of 3-N-alkylaminopropane-1-oles and dodecylpropylamines in aqueous solutions were detected. The influence of pH, concentration, and C-chain length of the tenside was investigated.     

Einfluß von haftvermittlern auf das feuchteverhalten naturfaserverstärkter kunststoffe

The poor resistance of cellulose fibres to moisture absorption and the lack of good interfacial adhesion make these fibres less attractive for reinforced plastics. By an optimal predrying, it is possible to increase the mechanical properties of jute-epoxy composites by 20%. Using silance as a coupling agent, the interface and, therefore, the composite properties are improved and the influence of moisture decreases. With this surface treatment, the tensile strength becomes independent of the moisture content of the composite. For the Young's modulus and the Wöhler curves, the influence of moisture on this composite properties decreases also distinctly.     

Einfluß der Anbauhäufigkeit von Winterraps auf das Auftreten von Schadfaktoren,die Ertragsleistung und Qualitätsmerkmale

Influence of the Cultivation Frequency of Winter Rape Seed on the Occurrence of Noxious Factors, on Crops and Quality Characteristics In a test series of crops, carried out in 1976 at the Ihinger Hof (480 m NN; 7.8° C mean annual temperature and 685 mm rainfall) with rape seed share of 25,33 and 50 % the importance of cultivation frequency with respect to the occurrence of deseases and parasites should be investigated and effects on crops and quality characteristics should be examined. After a running in period of several years a relation between the rape seed share in dependence on years and cultivated genotype and the occurrence of rottenness of the upper part of the root and the stem can be found which does not occur for the unregularly existing rape seed cancer. Higher shares of rape seed in the crop sequence lead to an average lower crop of nearly 10 % and to increased variation coefficients which indicate an increasing instability of crop. Investigations of the total N-content of the corn material show a year depending increase of the content of higher rape seed share from which you can conclude to lower contents of oil and thus to a quality diminishing.