Statistical media optimization for growth and PHB production from methanol by a methylotrophic bacterium

Mokhtari-Hosseini, Zahra Beagom; Vasheghani‐Farahani, Ebrahim; Heidarzadeh-Vazifekhoran, Ali; Shojaosadati, Seyed Abbas; Karimzadeh, Ramin; Khosravi‐Darani, Kianoush

doi:10.1016/j.biortech.2008.11.024

Cited by 96 publications

(44 citation statements)

References 21 publications

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“…PHA production costs depend on several factors like substrates, selected strain, cultivation strategy, and downstream processing. The utilization of cheap substrates [24][25][26][27][28] , kinetic modeling of the processes 29 , and tailored experimental design [30][31] are considered as outdoors to make PHA more competitive.…”

Section: Pha and Eps From H Mediterraneimentioning

confidence: 99%

Study on the Production and Re-use of Poly(3-hydroxybutyrate-co-3- hydroxyvalerate) and Extracellular Polysaccharide by the Archaeon Haloferax mediterranei Strain DSM 1411

Koller

Chiellini

Braunegg

2015

Chem.Biochem.Eng.Q.

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The halobacterium Haloferax mediterranei was used to study the production of two types of biopolymers: The biopolyester poly(3-hydroxybutyrate-co-3-hydroxyvalerate) (PHBV) was accumulated as intracellular granules, whereas an extracelluar polysaccharide was excreted in parallel to biopolyester synthesis.After production, microbial re-use and degradation of these polymers under different conditions were investigated to assess the requirements for handling the product-rich fermentation broth prior to the downstream processing for product recovery. Degradation kinetics of the polymers and the impact of different storage conditions on molar mass of PHBV were studied.It turned out that the biotechnological fermentation process can be run without any sterility precautions. No major product losses were observed without pasteurization of fermentation broth after the stop of fermentation. In addition, neither PHBV nor EPS are re-utilized by the cells for biomass formation even if the culture is maintained under conditions of carbon starvation for an extended time.

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Section: Pha and Eps From H Mediterraneimentioning

confidence: 99%

Study on the Production and Re-use of Poly(3-hydroxybutyrate-co-3- hydroxyvalerate) and Extracellular Polysaccharide by the Archaeon Haloferax mediterranei Strain DSM 1411

Koller

Chiellini

Braunegg

2015

Chem.Biochem.Eng.Q.

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“…The utilization of inexpensive substrates [36][37][38][39][40][41][42] , modeling 43 , proper experimental design 44,45 and development of new recovery method [46][47][48][49][50] as well as opportunities for their competition in the global market has recently been addressed. Besides various application of PHB 51 , its advantages and disadvantages in food packaging have been also reported 21 while little information can be found regarding PHB usage as food packaging.…”

Section: Phbmentioning

confidence: 99%

Application of Poly(hydroxyalkanoate) In Food Packaging: Improvements by Nanotechnology

Khosravi‐Darani¹

2015

Chem.Biochem.Eng.Q.

129

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The environmental impact of plastic usage is of critical concern and too great to repair. A shift toward biodegradable food packaging is one option. The aim of this review paper is the study of the potential of biodegradable materials for food packaging. The main characteristics in relation to food usage can be narrowed down to mass transfer (gas and water vapor), thermal and mechanical properties. Among several kinds of biodegradable polymers, poly(hydroxyalkanoate) is one of the favorable candidates for food packaging due to its physical and mechanical properties, biodegradability, with low permeability for O 2 , H 2 O and CO 2 without residues of catalysts and water solubility. The main focus of this article is to address poly(hydroxyalkanoate) as a potential candidate for food packaging. The need of applying biobased polymers in food packaging is presented in the introduction of this study. We also describe the most common biopolymers providing a brief overview of classification and application. This is followed by an outline of biopolymer production and a main section in which the properties of poly(hydroxybutyrate)-based nanocomposites of greatest relevance to food packaging are discussed. Furthermore, several approaches for improvement of poly(hydroxybutyrate) properties are described and the role of nanotechnology to improve its mechanical properties is presented. Finally, the article concludes with a summary as well as some possible future trends.

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“…When carbon source nutrients are available in excess relative to other nutrients in the growth environment, certain strains of bacteria produce and accumulate different types of polyester recognized as bioplastics, which have unique characteristics like biodegradability and biocompatibility (Madison and Huisman, 1999;Kim and Lenz, 2001;Steinbuchel, 2001;Ojumu et al, 2004;Reddy et al, 2009;Nayak et al, 2013). Among widely known bioplastics, polyhydroxybutyrate (PHB) is the most prevailing polyester owing to its great resemblance to synthetic petroleum-derived synthetic plastic polymers (Mokhtari-Hosseini et al, 2009;Berekaa and Al-Thawadi, 2012). Bioplastics have diversity of applications in medicine, tissue engineering, veterinary uses, agriculture, as well as food packaging (van der Walle et al, 2001;Zinn et al, 2001;Borah et al, 2002;Luengo et al, 2003).…”

Section: Introductionmentioning

confidence: 99%

Antibiotics Sensitivity and Heavy Metals Resistance in PHB-Producing Bacilli Isolated from Eastern Province, Saudi Arabia

Berekaa¹,

Salama²,

Alkharsah³

2016

IJAB

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To cite this paper: Berekaa, M., K. Salama and K. Alkharsah, 2016. Antibiotics sensitivity and heavy metals resistance in PHB-producing bacilli isolated from eastern province, Saudi Arabia. AbstractThere has been considerable interest in development and industrial production of polyhydroxybutyrate (PHB) biopolymers from bacteria due to its potential applications in agriculture, health and medicine. However, it is recommended to evaluate PHB-producing bacteria regarding sensitivity to antibiotics, resistance to heavy metals and possible toxicity before large scale production of the biopolymer. In this study, 120 bacterial strains isolated from different soil and sewage water samples in Eastern Province, Saudi Arabia, and screened for PHB production. megaterium DG8, DP7 and B. pseudomycoides DWST2-1. Bacillus sp. DSG5 and DPS6 followed by DSWT2-1, DS3-17 and DS3-12 showed highest resistance to Cr +6 (10 mg/mL), as well as Hg (62.5 μg/mL) and Ag (5 mg/mL), respectively while most strains were highly susceptible to other metals. Four isolates including B. cereus strain DS3-16 showed β-hemolysis activity, while Bacillus axarquiensis DSG5 showed α-hemolytic activity, indicating their possible toxicity.

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Statistical media optimization for growth and PHB production from methanol by a methylotrophic bacterium

Cited by 96 publications

References 21 publications

Study on the Production and Re-use of Poly(3-hydroxybutyrate-co-3- hydroxyvalerate) and Extracellular Polysaccharide by the Archaeon Haloferax mediterranei Strain DSM 1411

Study on the Production and Re-use of Poly(3-hydroxybutyrate-co-3- hydroxyvalerate) and Extracellular Polysaccharide by the Archaeon Haloferax mediterranei Strain DSM 1411

Application of Poly(hydroxyalkanoate) In Food Packaging: Improvements by Nanotechnology

Antibiotics Sensitivity and Heavy Metals Resistance in PHB-Producing Bacilli Isolated from Eastern Province, Saudi Arabia

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