Enhanced bacterial cellulose production from Gluconobacter xylinus using super optimal broth

Chandrasekaran, Prathna Thanjavur; Bari, Naimat Kalim; Sinha, Sharmistha

doi:10.1007/s10570-017-1419-2

Cited by 26 publications

(5 citation statements)

References 67 publications

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“…Chandrasekaran et al . () found that BNC from K. xylinus ATCC 11142 had a maximum degradation rate at around 300°C. The thermal stability of BNC produced by K. xylinus PTCC 1734 using media with mannitol or sucrose was analysed, and it was reported that the decomposition of the BNC samples resulted in a significant weight loss (70–80%) at around 360–390°C (Mohammadkazemi et al ., ).…”

Section: Resultsmentioning

confidence: 97%

Comparison of productivity and quality of bacterial nanocellulose synthesized using culture media based on seven sugars from biomass

Chen

et al. 2019

Microbial Biotechnology

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Summary Komagataeibacter xylinus ATCC 23770 was statically cultivated in eight culture media based on different carbon sources, viz. seven biomass‐derived sugars and one sugar mixture. The productivity and quality of the bacterial nanocellulose (BNC) produced in the different media were compared. Highest volumetric productivity, yield on consumed sugar, viscometric degree of polymerization (DPv, 4350–4400) and thermal stability were achieved using media based on glucose or maltose. Growth in media based on xylose, mannose or galactose resulted in lower volumetric productivity and DPv, but in larger fibril diameter and higher crystallinity (76–78%). Growth in medium based on a synthetic sugar mixture resembling the composition of a lignocellulosic hydrolysate promoted BNC productivity and yield, but decreased fibril diameter, DPv, crystallinity and thermal stability. This work shows that volumetric productivity, yield and properties of BNC are highly affected by the carbon source, and indicates how industrially relevant sugar mixtures would affect these characteristics.

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Section: Resultsmentioning

confidence: 97%

Comparison of productivity and quality of bacterial nanocellulose synthesized using culture media based on seven sugars from biomass

Chen

et al. 2019

Microbial Biotechnology

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“…where η is the BNC yield (%), m BNC is the weight of the BNC sample on an oven-dry basis (g), C g is the glucose concentration in the medium (g/L), V is the volume of the medium (L), and 0.9 is the conversion factor attributed to the detachment of the water molecule by polymerization of glucose into cellulose. This calculation method is a modification of classical Hestrin and Schramm's calculations [32] widely used in the biosynthesis of BNC [33]. The factor of 0.9 should be taken into account from the standpoint of stoichiometry of the BNC biosynthesis from glucose molecules.…”

Section: Calculation Of Bnc Yieldmentioning

confidence: 99%

Bacterial Nanocellulose Nitrates

et al. 2019

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Bacterial nanocellulose (BNC) whose biosynthesis fully conforms to green chemistry principles arouses much interest of specialists in technical chemistry and materials science because of its specific properties, such as nanostructure, purity, thermal stability, reactivity, high crystallinity, etc. The functionalization of the BNC surface remains a priority research area of polymers. The present study was aimed at scaled production of an enlarged BNC sample and at synthesizing cellulose nitrate (CN) therefrom. Cyclic biosynthesis of BNC was run in a semisynthetic glucose medium of 10−72 L in volume by using the Medusomyces gisevii Sa-12 symbiont. The most representative BNC sample weighing 6800 g and having an α-cellulose content of 99% and a polymerization degree of 4000 was nitrated. The nitration of freeze-dried BNC was performed with sulfuric-nitric mixed acid. BNC was examined by scanning electron microscopy (SEM) and infrared spectroscopy (IR), and CN was explored to a fuller extent by SEM, IR, thermogravimetric analysis/differential scanning analysis (TGA/DTA) and 13C nuclear magnetic resonance (NMR) spectroscopy. The three-cycle biosynthesis of BNC with an increasing volume of the nutrient medium from 10 to 72 L was successfully scaled up in nonsterile conditions to afford 9432 g of BNC gel-films. CNs with a nitrogen content of 10.96% and a viscosity of 916 cP were synthesized. It was found by the SEM technique that the CN preserved the 3D reticulate structure of initial BNC fibers a marginal thickening of the nanofibers themselves. Different analytical techniques reliably proved the resultant nitration product to be CN. When dissolved in acetone, the CN was found to form a clear high-viscosity organogel whose further studies will broaden application fields of the modified BNC.

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“…The conventional fermentation for BC production has been carried out using a chemically defined medium named HS (Hestrin and Schramm) composed of glucose, peptone, yeast extract, disodium phosphate, citric acid. [ 26 ] In addition to HS medium, several other media such as HS‐ascorbic acid (HSA) medium, [ 49 ] Yamanaka medium and Zhou's medium, [ 50 ] Son's synthetic medium, [ 51 ] M1A05P5 medium, [ 52 ] Super Optimal Broth with catabolite repression (SOC) medium, [ 53 ] and so on have been proposed for the production of BC. Glucose as the sole carbon source in the fermentation medium acts as a source of energy for the microorganisms as well as the precursor for the synthesis of BC.…”

Section: Bacterial Cellulosementioning

confidence: 99%

Recent development in bacterial cellulose production and synthesis of cellulose based conductive polymer nanocomposites

Poddar

Dikshit

2021

Nano Select

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Compared to plant‐based cellulosic biopolymers, bacterial cellulose (BC) produced from microbial sources demonstrates several unique properties. BC nanocomposites synthesized with the addition of nanofillers with distinct properties have further tailored the BC structure with improved physical and chemical properties. BC nanocomposites with the addition of electrically conductive filler materials, namely, conductive polymers, metallic or carbonaceous nanofillers have advanced the nanocomposites applications and their utilization in the fabrication of various modern electrical and electronic appliances such as biosensors, flexible electronics, electromagnetic interference (EMI) shielding and energy storage. The present review is focused to provide a complete overview of BC production and electrically conductive‐based‐BC nanocomposites at a single platform. Various methodologies used in BC production with varying microbial strains and substrate types used in the fermentation, surface functionalization of BC, and its purification are discussed in detail. Subsequently, the review explains the bacterial cellulose‐based electrical conductive nanocomposites combined with different types of nanofillers such as conductive polymers, metal oxides, and carbon‐based nanofillers for their application in modern electronic devices. The challenges faced during nanocomposites synthesis and methods to improve its electrical conductivity with possible futuristic solutions are also briefly discussed.

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Enhanced bacterial cellulose production from Gluconobacter xylinus using super optimal broth

Cited by 26 publications

References 67 publications

Comparison of productivity and quality of bacterial nanocellulose synthesized using culture media based on seven sugars from biomass

Comparison of productivity and quality of bacterial nanocellulose synthesized using culture media based on seven sugars from biomass

Bacterial Nanocellulose Nitrates

Recent development in bacterial cellulose production and synthesis of cellulose based conductive polymer nanocomposites

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