Die Verwendung von Bindemitteln bei der Wurstfabrikation

Ohne ZusammenfassungMitteilung aus dem Chemischen Untersuchungsamte der Stadt Chemnitz.     

Die Verwendung von Ablaugenlignin bei der Herstellung von Holzwerkstoffen

Lignins occurring in the spent liquors of pulp mills constitute large potentials as raw materials for wood adhesives. As a polyphenol, lignin contains reactive sites for condensation with formaldehyde or intramolecular reactions leading to cross-linked, insoluble resins. However, condensation reactions of this type need high temperatures or mineral acids. Another procedure consists of radical cross-linking by oxidative coupling. Up to now these procedures have not found technical application, due to corrosion and other problems. In contrast, up to 25% of conventionally used phenolic resin adhesives can presently be substituted by technical spent sulfite liquor.     

Die Wirkung der Verwendung von Bindemitteln bei der Wurstfabrikation

Ohne Zusammenfassung     

Enzymatische Prozesse bei der Verarbeitung von Kartoffeln

Enzymatic Processes in the Processing of Potatoes. The enzymatically convertable components of potatoes – starch, protein, fibres and pectins – are presented and especially the application of amylases (bacterial α-amylase, glucoamylase) in liquefaction and saccharification of pure potato starch, in direct enzymatic saccharification of potatoes and in the potato distillery is demonstrated. The use of bacterial α-amylase is also recommended for production of potato juice with dietetic effectiveness and in a quite new process for the conversion of wastes from convenient product plants (chips, pommes frites). The latter enables optimal results in pig-breeding or alternatively in obtaining of potable resp. power alcohol. Finally some other results in the treatment of potato pulp – waste material from potato starch manufacture – with pectinases, cellulases and amylases are given and the possibilities to modify potato protein described.     

Die Verwendung der Mineralstoffe bei Backpulvern

Ohne Zusammenfassung     

Ver?nderungen von Inhaltsstoffen bei der Verarbeitung von Tomaten

The influences of processing conditions and composition on chemical changes during thermal processing of tomatoes were investigated. During the Cold and Hot Break process pectin is degraded to different extents. Due to the thermal impact at first cyclization of glutamine to pyroglutamic acid takes place. At higher dry weight contents and during drying processes Amadori compounds and browning can be detected. The reaction products formed during thermal processing can be analysed by amino acid analysis and - after proper derivatization - by capillary gas chromatography.

     

Die Verwendung von Holz in der Elektrotechnik

Zusammenfassung Naturholz spielt bereits heute in der Isoliertechnik gegenüber den Pre?stoffen eine untergeordnete Rolle. Er verdankt seine Verwendung in erster Linie der z?hen Festigkeit, die gro?e Druck- und W?rmebelastung vertr?gt. Daneben ist der billige Preis und die gute Verarbeitungsm?glichkeit ausschlaggebend. Auch als Baustoff wird Naturholz in der Elektrotechnik seinen derzeitigen Anwendungsbereich kaum erweitern k?nnen. Bei weiterer Entwicklung der Holzfaserplatten werden diese vielleicht in der Elektrotechnik Anwendungsm?glichkeit finden k?nnen. Nicht aussichtslos sind ferner die Versuche, lange Holzfaserbündel als spinnbare Fasern, z. B. zum Ersatz von Jute zu verwenden.     

Zur Verwendung der Formoltitration bei der Beurteilung von Lebensmitteln

Ohne Zusammenfassung     

Formaldehydemission bei der Herstellung und Verarbeitung von Kurztakt-Filmen auf der Basis von Aminoplasten

During the manufacture of films for coating wood based materials some formaldehyde is emitted, which is measured and related to the amount of aminoplast resins applied. It is shown, to which degree the manufacturing method, the conditions of processing and the wood species influence the formaldehyde release. The formaldehyde release during pressing of films is low and well measurable. The formaldehyde release of coated wood based boards is remarkably reduced by the application of foils.     

Die Verwendung synthetischer Amylosen als Bezugssubstanzen bei der gelchromato-graphischen Molekulargewichtsbestimmung von Stärken

Application of Synthetic Amyloses as Standards in Gelchromatographic Molecular Weight Determination of Starches. Amyloses of almost uniform molecular size were synthesized from maltoheptaose and glucose-1-phosphate by the action of potatoe phosphorylase. The products of this synthesis were characterized by β-amylolysis, selektive precipitation fractionation and measurements of light scattering, osmotic pressure and intrinsic viscosity. The tests showed complete degradation of the amyloses by β-amylase and P_w/P_n-ratios between 1,00 and 1,15, corresponding very closely to a Poisson distribution. Because of their physicochemical properties the amyloses are very convenient standards for molecular weight determination of starch by gel chromatography. The results were compared with those obtained by calibration with dextran fractions.     

Untersuchungen zur Herstellung harter Holzfaserplatten im Trockenverfahren unter Verwendung von Lignin-Phenol-Bindemitteln

Hard wood fibre boards can be manufactured in the dyring process with lignin-phenol-glues with very good mechanical properties and with a simple technology. Important technological influencing parameters are the glueing content, the pressing regime and the moisture content of the glued fibre materials. Boards are characterized by very low emissions of harmful substances of volatile formaldehyde and volatile phenol.