Biotransformation of glucose to gluconic acid by Aspergillus niger—study of mass transfer in an airlift bioreactor

Effects of glucose oxidase on the growth performance, serum parameters and faecal microflora of piglets

“…It catalyses the oxidation of β-D-glucose to gluconic acid by utilizing molecular oxygen as an electron acceptor with simultaneous production of H 2 O 2 (Hatzinikolaou & Macris, 1995). Two products of GOD hydrolysis are H 2 O 2 and gluconic acid, which may act as a bacteriocide (Crueger & Crueger, 1990;Rasiah et al, 2005;Costa et al, 2013) and acidity regulator (Nakao et al, 1997;Klein et al, 2002) to reduce the gastric pH, inhibit harmful bacteria and promote the growth of beneficial bacteria. Biagi et al (2006) reported that feeding gluconic acid can improve the growth performance of piglets after weaning.…”

“…Glucose oxidase has several commercial applications, for example improving colour, flavour and shelf-life of food materials, removing oxygen from fruit juices and canned beverages, inhibiting the growth of pathogens and preventing rancidity in mayonnaise (Tiina et al, 1989;Malherbe et al, 2003;Seifu et al, 2004;Opwis et al, 2008;Bankar et al, 2009). Glucose oxidase can catalyse the formation of gluconic acid, and has been used as a food additive to regulate the acidity of sterilization solutions and bleaching agents in food manufacturing and as a salt in chemical components for medication (Nakao et al, 1997;Klein et al, 2002). Since 1999, GOD has been supplemented into 12 feed preparations, according to the Catalogue of Feed Additive Varieties released by the Ministry of Agriculture, People's Republic of China.…”

Gluconic Acid Production from Golden Syrup by Aspergillus niger Strain using Semiautomatic Stirred-Tank Fermenter

“…To obtain high level of GA production a sufficient level of pure oxygen supply is indispensible [28,29]. However, in present study pure form of air supply were used during fermentation process.…”

The antifungal activity and biotransformation of diisophorone by the fungus Aspergillus niger

“…3 The primary uses of A niger are for the production of synthetically important enzymes, including glucose oxidase, 7 lipase 8 and phytase, 9 and organic acids such as the flavour-enhancing agents citric acid 10 and gluconic acid. 11 A niger has other uses; it is used to test the efficacy of preservative treatments due to its ease of visualization and resistance to several antifungal agents, 12 to remove heavy metals from waste water, 13 and in the biodegradation of hexadecane.…”