نتایج جستجو برای: polyanionic cellulose

تعداد نتایج: 30592  

Journal: :Plant signaling & behavior 2010
Ying Gu Chris Somerville

Cellulose is the most abundant biopolymer on earth. The great abundance of cellulose places it at the forefront as a primary source of biomass for renewable biofuels. However, the knowledge of how plant cells make cellulose remains very rudimentary. Cellulose microfibrils are synthesized at the plasma membrane by hexameric protein complexes, also known as cellulose synthase complexes. The only ...

ژورنال: Medical Laboratory Journal 2015
nasrolahi Omran , Ayatollah, Jamali , Aylar , Khozein , Zahra ,

Abstract        Background and Objective: the Formation of urinary infection by uropathogenic E.coli needs   numerous virulence factors and biofilm formation is among these factors. Bacteria that form biofilms express phenotype traits that appear according to the bacteria type. Cellulose is an important compound on the outside of E.coli causing bacte...

2011
Jiebin Tang Kefu Chen Jun Xu Jun Li Chuanshan Zhao

Dilute sulfuric acid hydrolysis was performed before the isolation of cellulose from Eulaliopsis binata. And then, the effects of dilute acid hydrolysis on composition and structure of the cellulose was studied in detail. The results indicated that hemicellulose was dissolved mostly and that the lignin-hemicellulose-cellulose interactions were also partially disrupted during the dilute acid hyd...

1999
Malcolm Brown

Carbohydrate researchers may think it is reasonable to believe that the synthesis and structure of a crystalline b-1,4 glucan would be quite straightforward; however, this is not the case. The pitfalls and detours of research have been counterbalanced by exciting new discoveries in cellulose structure, biosynthesis, and molecular biology. Cellulose exists in crystalline and noncrystalline state...

2016
Michael Florea Benjamin Reeve James Abbott Paul S. Freemont Tom Ellis

Bacterial cellulose is a strong, highly pure form of cellulose that is used in a range of applications in industry, consumer goods and medicine. Gluconacetobacter hansenii ATCC 53582 is one of the highest reported bacterial cellulose producing strains and has been used as a model organism in numerous studies of bacterial cellulose production and studies aiming to increased cellulose productivit...

2013
SiunChee Tan ChinEng Ong Yuen Kah Hay Beow Chin Yiap

Cellulose is a renewable and biodegradable natural biopolymersynthesized mainly in plants such as wood, bark, cotton fiber, green algae, some bacteria and animals. Pre-treatment processes such as alkaline purification and enzymatic purification are applied in order to create a proper sorption characteristic of regenerated cellulose fiber. Prior to the application of cellulose/cellulose derivati...

2017
Nadia Halib Francesca Perrone Maja Cemazar Barbara Dapas Rossella Farra Michela Abrami Gianluca Chiarappa Giancarlo Forte Fabrizio Zanconati Gabriele Pozzato Luigi Murena Nicola Fiotti Romano Lapasin Laura Cansolino Gabriele Grassi Mario Grassi

Because of its high biocompatibility, bio-degradability, low-cost and easy availability, cellulose finds application in disparate areas of research. Here we focus our attention on the most recent and attractive potential applications of cellulose in the biomedical field. We first describe the chemical/structural composition of cellulose fibers, the cellulose sources/features and cellulose chemi...

2006
Thomas Röder Johann Moosbauer Mario Fasching Andreas Bohn Hans-Peter Fink Thomas Baldinger Herbert Sixta

The crystallinity of cellulose is one of the main structural parameters determining properties like accessibility and reactivity of cellulose. Native cellulose (e.g., wood, pulp, cotton, kenaf, bacteria cellulose) consists of the cellulose I, regenerated cellulose consists of the cellulose II modification. WAXS (wide angle X-ray scattering) is the standard method for the determination of crysta...

Journal: :Journal of bacteriology 2013
Tomonori Nakai Yasushi Sugano Makoto Shoda Hitoshi Sakakibara Kazuhiro Oiwa Satoru Tuzi Tomoya Imai Junji Sugiyama Miyuki Takeuchi Daisuke Yamauchi Yoshinobu Mineyuki

Cellulases are enzymes that normally digest cellulose; however, some are known to play essential roles in cellulose biosynthesis. Although some endogenous cellulases of plants and cellulose-producing bacteria are reportedly involved in cellulose production, their functions in cellulose production are unknown. In this study, we demonstrated that disruption of the cellulase (carboxymethylcellulas...

2016
Jielong Su Vikram S. Raghuwanshi Warwick Raverty Christopher J. Garvey Peter J. Holden Marie Gillon Stephen A. Holt Rico Tabor Warren Batchelor Gil Garnier

Novel thin and smooth deuterated cellulose films were synthesised to visualize adsorbed bio-macromolecules using contrast variation neutron reflectivity (NR) measurements. Incorporation of varying degrees of deuteration into cellulose was achieved by growing Gluconacetobacter xylinus in deuterated glycerol as carbon source dissolved in growth media containing D2O. The derivative of deuterated c...

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