نتایج جستجو برای: polyhydroxybutyrate phb

تعداد نتایج: 1668  

2013
Takashi Osanai Keiji Numata Akira Oikawa Ayuko Kuwahara Hiroko Iijima Yoshiharu Doi Kan Tanaka Kazuki Saito Masami Yokota Hirai

Because cyanobacteria directly harvest CO2 and light energy, their carbon metabolism is important for both basic and applied sciences. Here, we show that overexpression of the sigma factor sigE in Synechocystis sp. PCC 6803 widely changes sugar catabolism and increases production of the biodegradable polyester polyhydroxybutyrate (PHB) during nitrogen starvation. sigE overexpression elevates th...

Journal: :Journal of bacteriology 2001
G M York B H Junker J A Stubbe A J Sinskey

Polyhydroxyalkanoates (PHAs) are polyoxoesters that are produced by diverse bacteria and that accumulate as intracellular granules. Phasins are granule-associated proteins that accumulate to high levels in strains that are producing PHAs. The accumulation of phasins has been proposed to be dependent on PHA production, a model which is now rigorously tested for the phasin PhaP of Ralstonia eutro...

Journal: :Scientific reports 2016
Yohei Yamazaki Pedro Milet Meirelles Sayaka Mino Wataru Suda Kenshiro Oshima Masahira Hattori Fabiano L Thompson Yuichi Sakai Toko Sawabe Tomoo Sawabe

Gut microbiome shapes various aspects of a host's physiology, but these functions in aquatic animal hosts have yet to be fully investigated. The sea cucumber Apostichopus japonicus Selenka is one such example. The large growth gap in their body size has delayed the development of intensive aquaculture, nevertheless the species is in urgent need of conservation. To understand possible contributi...

2012
Ramana

Polyhydroxybutyrate producing bacteria from garden soil were isolated and characterized for their morphological, biochemical properties. Based on their 16S rRNA gene sequences, they were identified as Bacillus mycoides DFC1, Bacillus cereus DC1, Bacillus cereus DC2, Bacillus cereus DC3 and Bacillus cereus DC4. The bacteria were screened for PHB production and compared for the intensity of fluor...

Journal: :Microbiology 2001
Q Qi B H Rehm

Caulobacter crescentus was investigated with respect to polyhydroxybutyrate (PHB) biosynthesis. Polyhydroxyalkanoate (PHA) accumulation contributing to approximately 18% of the cell dry weight was obtained in the presence of glucose. Gas chromatography-mass spectrometry and gel permeation chromatography of the purified PHA showed that this polyester was solely composed of 3-hydroxybutyrate and ...

Journal: :Journal of advanced scientific research 2021

In reaction to the environmental issues caused by plastics of petrochemical beginning, a decrease in utilization these materials and their substitution biodegradable polymers has been sought. Polyhydroxybutyrate (PHB), biopolymer biological beginning that place polyhydroxyalkanoates (PHAs), is comparable polypropylene terms its mechanical properties, thermo degradability dissolving temperature....

2002
Purev Saruul Friedrich Srienc David A. Somers Deborah A. Samac

ketothiolase, acetoacetyl-CoA reductase, and PHB synthase. These enzymes are encoded by phbA, phbB, Alfalfa (Medicago sativa L.) is primarily used as a source of forage and phbC, respectively (Slater et al., 1988). The monoand animal feed. Improving the economic value of alfalfa could be achieved by developing new uses of this perennial crop. To investigate meric composition of PHA polymers is ...

2017
Majela González-Miro Laura Rodríguez-Noda Mildrey Fariñas-Medina Dagmar García-Rivera Vicente Vérez-Bencomo Bernd H.A. Rehm

Streptococcus pneumoniae is a human pathogen responsible for the majority of childhood pneumonia and media otitis cases worldwide. The diversity of its capsular polysaccharides (CPS) results in more than 91 serotypes of which at least 23 are virulent. Various CPS conjugated to immunogenic carrier proteins are currently licensed and provide protection against the infection caused by the respecti...

2014
Richard B McQualter Maria N Somleva Leigh K Gebbie Xuemei Li Lars A Petrasovits Kristi D Snell Lars K Nielsen Stevens M Brumbley

BACKGROUND Polyhydroxyalkanoates are linear biodegradable polyesters produced by bacteria as a carbon store and used to produce a range of bioplastics. Widespread polyhydroxyalkanoate production in C4 crops would decrease petroleum dependency by producing a renewable supply of biodegradable plastics along with residual biomass that could be converted into biofuels or energy. Increasing yields t...

Journal: :Chemosphere 2021

The study evaluated the preparation of a biocomposite using waste-derived polyhydroxybutyrate (PHB) and bagasse cellulose (α-cellulose) in biorefinery approach. PHB was produced dark fermentation effluent rich volatile fatty acids (VFA) derived from vegetable waste α-cellulose extracted sugarcane (SCB). Nutrient limitation induced microbial accumulation, wherein maximum production 0.28 ± 0.06 g...

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