Interrelationships in trace-element metabolism in Aspergillus niger

Interrelationships in trace-element metabolism in Aspergillus niger.

Trehalose Metabolism and Stress Resistance in Aspergillus niger

Food spoilage by filamentous fungi, moulds, is a global issue of great significance. Mould growth can cause food losses due to deterioration, and adverse health effects due to toxin production. Conidia, asexual spores, are the main factors of dispersal and infection in most food-relevant moulds. They therefore constitute important objects of study when trying to improve food safety. This thesis...

Metabolism of some aromatic acids by Aspergillus niger.

200 such colonies were picked from a galactose plate and, after purification through three singlecolony isolations, were tested for their ability to produce acid from all the sugars. Of these, 186 were positive on all the sugar plates. The remaining 14 isolates were unable to produce acid from any of the sugars, including galactose, and were therefore considered to have been false positives on ...

Trace element nutrition and bone metabolism.

Many of the trace elements which have essential roles in animals, such as zinc (Zn), manganese (Mn) and copper (Cu), are required for the growth, development and maintenance of healthy bones (Rucker, 1988; Leach, 1988). Of the remaining trace or ultratrace elements, which by definition are normally present at low concentrations in animal tissues, some have a toxic effect on bone such as lead (P...

Asparaginase from Aspergillus Niger Expressed in A. Niger

Asparaginase is an enzyme that catalyses the hydrolysis of the amino acid L-asparagine to Laspartic acid and ammonia. The asparaginase enzyme described in the DSM’s dossier is intended for use as a processing aid to reduce in food the levels of free L-asparagine, which is a major precursor in the formation of the food contaminant acrylamide. Acrylamide is formed from Lasparagine and reducing su...