Production, recovery and applications of xanthan gum by Xanthomonas campestris

Palaniraj, Aarthy; Jayaraman, Vijayakumar

doi:10.1016/j.jfoodeng.2011.03.035

Cited by 376 publications

(196 citation statements)

References 75 publications

(133 reference statements)

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“…This innovation can improve the industrial potential of the nanocomposite. According to Palaniraj and Jayaraman, xanthan gum is industrially produced by bacterial fermentation and is used to stabilize suspensions of drugs such as dextromethorphan and thiabendazole [20]. The biosynthesis of AgNPs, with sizes between 5-40 nm and ~9.1 nm, and their stabilization with xanthan gum, had already been reported by Xu et al and Emam and Zahran, respectively [14,21].…”

Section: Characterization Of the Silver Nanocomposite Biosynthesizedmentioning

confidence: 90%

Silver Nanocomposite Biosynthesis: Antibacterial Activity against Multidrug-Resistant Strains of Pseudomonas aeruginosa and Acinetobacter baumannii

et al. 2016

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Abstract:Bacterial resistance is an emerging public health issue that is disseminated worldwide. Silver nanocomposite can be an alternative strategy to avoid Gram-positive and Gram-negative bacteria growth, including multidrug-resistant strains. In the present study a silver nanocomposite was synthesized, using a new green chemistry process, by the addition of silver nitrate (1.10 −3 mol·L −1 ) into a fermentative medium of Xanthomonas spp. to produce a xanthan gum polymer. Transmission electron microscopy (TEM) was used to evaluate the shape and size of the silver nanoparticles obtained. The silver ions in the nanocomposite were quantified by flame atomic absorption spectrometry (FAAS). The antibacterial activity of the nanomaterial against Escherichia coli (ATCC 22652), Enterococcus faecalis (ATCC 29282), Pseudomonas aeruginosa (ATCC 27853) and Staphylococcus aureus (ATCC 25923) was carried out using 500 mg of silver nanocomposite. Pseudomonas aeruginosa and Acinetobacter baumannii multidrug-resistant strains, isolated from hospitalized patients were also included in the study. The biosynthesized silver nanocomposite showed spherical nanoparticles with sizes smaller than 10 nm; 1 g of nanocomposite contained 49.24 µg of silver. Multidrug-resistant strains of Pseudomonas aeruginosa and Acinetobacter baumannii, and the other Gram-positive and Gram-negative bacteria tested, were sensitive to the silver nanocomposite (10-12.9 mm of inhibition zone). The biosynthesized silver nanocomposite seems to be a promising antibacterial agent for different applications, namely biomedical devices or topical wound coatings.

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Section: Characterization Of the Silver Nanocomposite Biosynthesizedmentioning

confidence: 90%

Silver Nanocomposite Biosynthesis: Antibacterial Activity against Multidrug-Resistant Strains of Pseudomonas aeruginosa and Acinetobacter baumannii

et al. 2016

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“…Xanthan is the most important microbial polysaccharide industrially produced by Xanthomonas campestris. Due to its unique rheological properties, this biopolymer is widely used in the food, cosmetic, pharmaceutical, petrochemical and other industries as a thickening agent, stabilizer, or emulsifier, and combined with other polymers as a gelling agent (10,11).…”

Section: Introductionmentioning

confidence: 99%

Wastewaters from rose wine production as substrate for xanthan production

Bajić¹,

Dodić²,

Grahovac³

et al. 2015

Second International Conference on Advances in Bio-Informatics and Environmental Engineering - ICABEE 2015

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-Wineries and other grape processing industries annually generate large amounts of solid and liquid waste streams. Winery wastewaters are the waste product of many independent processing and cleaning operations in wineries. As a consequence of the working period and the winemaking technologies, as well as the cleaning practices, volumes and composition of winery wastewaters greatly vary over the year. Due to high organic load, the disposal of these effluents in the environment causes several issues. The bioconversions of winery wastewaters in valuable products are an important alternative to overcome these ecological problems. The aim of this study was to examine the possibility of xanthan production from media based on four wastewaters obtained from different stages of the rose wine production process, i.e. wastewaters collected during the washing of the crusher, press and tanks after clarification of must and fermentation. Process efficacy was estimated based on raw xanthan yield and rheological characteristics of media. In applied experimental conditions, raw xanthan yields were in the range between 8.03 g/L and 17.52 g/L. Also, all cultivation media showed pseudoplastic behavior. Obtained results suggest that wastewaters from rose wine production have a great potential to be used as a substrate for production of this high value biopolymer.

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“…[1][2][3] When xanthan is added to aqueous solutions even in small quantities, it dramatically increases the viscosity of the medium and stabilizes it, which makes this polysaccharide economically viable. The industrial production of xanthan gum, as well as its commercialization and use, have progressively increased at an annual rate of 5-10%.…”

Section: Introductionmentioning

confidence: 99%

“…12 Therefore, Souza et al 13 proposed a method based on the use of reflux system adapted in the digestion tubes for sample preparation of the xanthan gum and determination of volatile elements (Cd and Pb) by graphite furnace atomic absorption spectrometry (GF AAS). According to the authors, the samples were digested only with HNO 3 and the results for the analysis of respective analytes were satisfactory. Furthermore, this system has also been applied to other studies: determination of Hg in biological samples of fish; 14 Cd, Pb and Sn in meat samples; 15 As, Cd, Pb and Se, 16 Cu, Fe, Mn and Zn 17 in rice.…”

Section: Introductionmentioning

confidence: 99%

Evaluation of the Use of a Reflux System for Sample Preparation of Xanthan Gum and Subsequent Determination of Ca, Cu, K, Mg, Na and Zn by Atomic Spectrometry Techniques

Rosa¹,

Oreste²,

Bonemann³

et al. 2015

Journal of the Brazilian Chemical Society

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The aim of this study was to evaluate the performance of a reflux system adapted in the digestion tubes in sample preparation of xanthan gum for subsequent determination of Ca, Cu, K, Mg, Na and Zn by using spectrometric techniques. Through the proposed method, the samples were digested with HNO 3 for 3 h in a digester block at 220 °C. The accuracy of the method was evaluated by comparing the results with another sample preparation method and by using recovery tests, which results vary between 83 and 103%. The efficiency of digestion was assessed and significant results were verified through residual carbon values, which were five times lower compared to conventional acid digestion in open system, with use of HNO 3 and HClO 4 . The proposed methodology is a simple and accurate analytical strategy, which does not require the use of special equipment, neither a mixture of strong oxidizing acid in the sample preparation.

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Production, recovery and applications of xanthan gum by Xanthomonas campestris

Cited by 376 publications

References 75 publications

Silver Nanocomposite Biosynthesis: Antibacterial Activity against Multidrug-Resistant Strains of Pseudomonas aeruginosa and Acinetobacter baumannii

Silver Nanocomposite Biosynthesis: Antibacterial Activity against Multidrug-Resistant Strains of Pseudomonas aeruginosa and Acinetobacter baumannii

Wastewaters from rose wine production as substrate for xanthan production

Evaluation of the Use of a Reflux System for Sample Preparation of Xanthan Gum and Subsequent Determination of Ca, Cu, K, Mg, Na and Zn by Atomic Spectrometry Techniques

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