The effect of carbon and nitrogen sources on bacterial

Abstract Bacterial cellulose (BC) synthesized by Gluconacetobacter sucrofermentans has a high degree of crystallinity durability great resistance and biocompatibility This study evaluates the effect that carbon and nitrogen sources present in HS (Hestrin–Schramm) culture medium have on BC from G sucrofermentans CECT 7291 used to restore damaged documents

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Microbial production of l

A process for producing L-ascorbic acid or D-erythorbic acid or in each case its sodium potassium or calcium salt from 2-keto-L-gulonic acid or 2-keto-D-gluconic acid or in each case its sodium potassium or calcium salt involves incubating 2-keto-L-gulonic acid or 2-keto-D-gluconic acid each as the free acid or as its sodium potassium or calcium salt and cells of a thermoacidophilic

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MICROBIAL PRODUCTION OF L

CONSTITUTION: The process for producing L-ascorbic acid or its sodium potassium or calcium salt from 2-keto-L-gulonic acid or its sodium potassium or calcium salt or D-erythorbic acid or its sodium potassium or calcium salt from 2-keto-D-gluconic acid or its sodium potassium or calcium salt comprises the steps of: incubating 2-keto-L

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dextro

The salts of gluconic acid are known as gluconates Gluconic acid gluconate salts and gluconate esters occur widely in nature because such species arise from the oxidation of glucose Gluconic acid occurs naturally in fruit honey kombucha tea and wine As a food additive (E574) it is an acidity regulator (Wikipedia)

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Microbial bio transformation: a process for chemical

11/21/2016Microbial biotransformation is widely used in the transformation of various pollutants or a large variety of compounds including hydrocarbons pharmaceutical substances and metals 7 These transformations can be congregated under the categories: oxidation reduction hydrolysis isomerisation condensation formation of new carbon bonds and

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Continuous gluconic acid production by isolated yeast

By extensive microbial screening about 50 strains with the ability to secrete gluconic acid were isolated from wild flowers The strains belong to the yeast-like mould Aureobasidium pullulans (de Bary) Arnaud In shake flask experiments gluconic acid concentrations between 23 and 140 g/l were produced within 2 days using a mineral medium

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CiteSeerX — Summary

Gluconic acid and its deriva-tives the principal being sodium gluconate have wide applications in food and pharma-ceutical industry This article gives a review of microbial gluconic acid production its properties and applications Key words: gluconic acid glucose oxidase microbial production Aspergillus niger

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Biotechnological production of gluconic acid future

Abstract Gluconic acid (GA) is a multifunctional carbonic acid regarded as a bulk chemical in the food feed beverage textile pharmaceutical and construction industries The favored production process is submerged fermentation by Aspergillus niger utilizing glucose as a major carbohydrate source which accompanied product yield of 98% Howev- er use of GA and its derivatives is currently

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The current status and future perspectives of lactobionic

from gluconic acid and galactose produced by oxidation of lactose This organic acid is a high Lactobionic acid applications in food industry Applications Reference Antioxidant (FDA 2011) lactobionic acid production in microbial synthesis pathway (Alonso Rendueles Diaz 2011)

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Exploring fungal biodiversity: organic acid production by

A niger BRFM422 was selected for its production of citric acid (2 2 g L −1) and A niger BRFM431 was selected for its production of citric (2 1 g L −1) and gluconic acids (3 7 g L −1) At day 6 of incubation 14 2 to 22 9 g L −1 of glucose remained in the medium and these strains converted 8 to 15% of the glucose consumed to the main

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Gluconic Acid

Reproduced from Ramachandran S Fontanille P Pandey A and Larroche C (2006) Gluconic acid: Properties applications and microbial production Food Technology and Biotechnology 44: 185–195 The main route of gluconic acid production has been by fermentation mainly using A niger in submerged fermentations

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Gluconic Acid: Properties Applications and Microbial

Gluconic acid is a mild organic acid derived from glucose by a simple oxidation reac-tion The reaction is facilitated by the enzyme glucose oxidase (fungi) and glucose de-hydrogenase (bacteria such as Gluconobacter) Microbial production of gluconic acid is the preferred method and it dates back to several decades The most studied and widely used

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Co

Goals / Objectives Here we propose a new route for isobutanol production with an important chemical gluconate produced as a co-product from cellulosic biomass Isobutanol is a potential substitute of gasoline and an intermediate for diesel and jet fuel Meanwhile gluconic acid and its salts (gluconate) are important industrial chemicals that have wide applications in pharmaceutical food

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Gluconic Acid: Properties Applications and Microbial

Microbial production of gluconic acid is the preferred method and it dates back to several decades The most studied and widely used fermentation process involves the fungus Aspergillus niger Gluconic acid and its derivatives the principal being sodium gluconate have wide applications in food and pharmaceutical industry

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Gluconic Acid

Gluconic acid has versatile properties through being a polyhydroxycarboxylic acid with both hydroxyl and carboxyl groups which can react Concentrated solutions of gluconic acid contain some lactone (GdL) the neutral cyclic ester which is less soluble in the cold and possesses no actual acid properties

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Microbial production of food ingredients enzymes and

Microbialproductionof foodingredients enzymes andnutraceuticals 12 3 Gluconic acidproduction 289 12 4 Oxidative branch ofthe citric acid cycle 293 16 4 Properties and structure-function relationships 443 16 5 Future trends 453 16 6 References 454 17 Microbial production ofxylitol andotherpolyols 469

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US Patent for Enzymatic production of gluconic acid or its

An enzymatic process for the conversion of glucose into gluconic acid uses concentrated glucose solutions The process employs a combination of glucose oxidase and catalase enzymes which may be obtained from an Aspergilltus niger strain and has a high ratio of catalase glucose oxidase activity The enzymatic process requires less time than conventional fermentation processes the yield of the

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Improved production of bacterial cellulose and its

Glucose and fructose as the carbon source and acetic acid as the energy source combined with a precise control of pH and dissolved oxygen levels results in highly improved cellulose yields An internal pH control in stationary surface cultures was achieved by an appropriate choice of the ratio of fructose/glucose/acetic acid

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Rhizosphere

Many plant-root-associated microbes can trigger plant defenses Yu et al show that the production of gluconic acid and its derivative 2-keto gluconic acid acidifies the plant growth medium suppressing flg22-induced root immunity to facilitate colonization by beneficial root microbiota

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Glucose oxidase: natural occurrence function properties

GOX is Generally Regarded As Safe and GOX from A niger is the basis of many industrial applications GOX-catalysed reaction removes oxygen and generates hydrogen peroxide a trait utilised in food preservation GOX has also been used in baking dry egg powder production wine production gluconic acid production etc

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