The relationship between absolute retracts, injectives and equationally compact algebras in finitely generated congruence
distributive varieties with 1- element subalgebras is considered and several characterization theorems are proven. Amongst
others, we prove that the absolute retracts in such a variety are precisely the injectives in the amalgamation class and that
every equationally compact reduced power of a finite absolute retract is an absolute retract. We also show that any elementary
amalgamation class is Horn if and only if it is closed under finite direct products.
The possibilities are discussed of the instrumental activation analysis of phosphorus in rocks by the reaction31P(n, γ)32P (T=14.2 d). Results are given for six standard rocks of the U.S. Geological Survey.
Authors:C. Roets, S.H. Rose, M. Muller and M. Manley
The effect of a pure endoxylanase (Xyn2) and endoglucanase (EgII) from Trichoderma reesei on bread flour quality were compared to a commercial endoxylanase from Aspergillus niger (Com-xyl) and a cellulase-xylanase cocktail from T. reesei (Cel-xyl). Effects of these enzymes on dough quality, bread weight, height and crumb softness were analysed. Results obtained during commercial-scale baking tests often differed from those obtained during laboratory-scale tests; indicating that results from laboratory-scale baking tests cannot be extrapolated to commercialscale bread production. Low levels of endoxylanase activity benefited bread height and volume without affecting slice brightness in commercial-scale tests. The addition of endoglucanases and α-amylases can also be advantageous resulting in less endoxylanase activity required to obtain similar results.