A preliminary study of caffeine degradation by Pseudomonas sp. GSC 1182

Gokulakrishnan, S.; Krishnan, Chandraraj; Gummadi, Sathyanarayana N.

doi:10.1016/j.ijfoodmicro.2006.07.005

Cited by 49 publications

(23 citation statements)

References 13 publications

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“…in a shake flask have shown that degradation of caffeine was strongly affected by pH [17]. This was because of high rates of metabolite formation during active degradation of caffeine leading to accumulation of nitrogenous methylxanthines.…”

Section: Resultsmentioning

confidence: 99%

“…In this respect, a previously isolated strain of Pseudomonas closely resembling Pseudomonas putida was capable of utilizing caffeine as sole carbon and nitrogen source [9,17]. The strain exhibited substrate inhibition kinetics when grown on caffeine as sole source of carbon and nitrogen and the minimum inhibitory concentration of caffeine was 20 g l -1 [18].…”

Section: Introductionmentioning

confidence: 99%

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Optimization of production of caffeine demethylase by Pseudomonas sp. in a bioreactor

Gummadi

Dash

Santhosh

2009

J Ind Microbiol Biotechnol

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The effect of pH, aeration rate, and agitation rate on specific productivity of caffeine demethylase from Pseudomonas sp. was studied in a bioreactor. Maximum specific productivity of caffeine demethylase of 2,214 U g cell dry weight(-1) h(-1) was obtained at 0.27 vvm, 700 rpm, and pH 7.0. Under these conditions, volumetric oxygen transfer coefficient was 74.2 h(-1), indicating that caffeine demethylase production by Pseudomonas sp. was highly oxygen-dependent. Different metabolite formation at different agitation and aeration rates can be used as a strategy for recovery of pharmaceutically important metabolites from caffeine by manipulation of conditions in a bacterial culture. This is the first report on production of high levels of caffeine demethylase in bioreactors.

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Section: Resultsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Optimization of production of caffeine demethylase by Pseudomonas sp. in a bioreactor

Gummadi

Dash

Santhosh

2009

J Ind Microbiol Biotechnol

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“…A newer approach for degradation of caffeine to non-toxic product was found to be microbial and enzymatic treatment by Pseudomonas and Aspergillus species (Gummadi et al 2009, Gokulakrishnan et al 2007). Adsorption assisted Table 4 Theanine extraction from tea leaves…”

Section: Decaffeination or Caffeine Extraction From Teamentioning

confidence: 99%

Efficient extraction strategies of tea (Camellia sinensis) biomolecules

Banerjee

Chatterjee

2014

J Food Sci Technol

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Tea is a popular daily beverage worldwide. Modulation and modifications of its basic components like catechins, alkaloids, proteins and carbohydrate during fermentation or extraction process changes organoleptic, gustatory and medicinal properties of tea. Through these processes increase or decrease in yield of desired components are evident. Considering the varied impacts of parameters in tea production, storage and processes that affect the yield, extraction of tea biomolecules at optimized condition is thought to be challenging. Implementation of technological advancements in green chemistry approaches can minimize the deviation retaining maximum qualitative properties in environment friendly way. Existed extraction processes with optimization parameters of tea have been discussed in this paper including its prospects and limitations. This exhaustive review of various extraction parameters, decaffeination process of tea and large scale cost effective isolation of tea components with aid of modern technology can assist people to choose extraction condition of tea according to necessity.

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“…The concentration of caffeine in the sorption-only system decreased by 76% within 13 days and subsequently remained stable, while all of the caffeine in the combined sorption-biodegradation system was consumed by the fourth day (t 1/2 = 1.5 days). Caffeine biodegradation has been documented in single culture [25,26], mixed consortium [27] and in wastewater treatment plants (WWTPs) that used biological treatment systems [15,28]. Santos et al [15] monitored several pharmaceutically active compounds over a one-year period in the influents and effluents of WWTPs and found that more than 80% of the caffeine had been removed by the stipulated hydraulic retention time.…”

Section: Sorption and Biodegradation Studiesmentioning

confidence: 99%