نتایج جستجو برای: alginate

تعداد نتایج: 8470  

2009
Laura A. Cotton Rebecca J. Graham Rose J. Lee

The formation of a biofilm by many opportunistic bacteria such as Pseudomonas aeruginosa has been shown to provide the bacteria with a form of protection from various environmental fluctuations. Biofilm formation through the excretion of an exopolysaccharide matrix has become particularly important in hospital settings where many Pseudomonas infections are resistant to commonly used antibiotics...

Journal: :Microbiology 1994
P J Tatnell N J Russell P Gacesa

The Pseudomonas aeruginosa enzyme GDP-mannose dehydrogenase (GMD) is encoded by the algD gene, and previous genetic studies have indicated that it is a key regulatory and committal step in the biosynthesis of the polysaccharide alginate. In the present study the algD gene has been cloned into the broad-host-range expression vector pMMB66EH and GMD overexpressed in mucoid and genetically-related...

Journal: :applied biotechnology reports 0
ali mohammad latifi applied biotechnology research center, baqiyatallah university of medical sciences, tehran, iran ehsan sadegh nejad hamid babavalian

the alginate was extracted with six different methods from iran south seacoast algae, sargassum sp, and the percentage yield of alginate was determined. we divided our methods to two groups including acidic extraction and non-acidic. in acidic methods, hcl and h 2 so 4 were used as a detergent in extraction process and cacl 2 was exerted in non-acidic treatments. all treatments compared with ea...

Journal: :avicenna journal of medical biotechnology 0

background: protein aggregation is one of the important, common and troubling problems in biotechnology, pharmaceutical industries and amyloid-related disorders. methods: in the present study, the inhibitory effects of some carbohydrates (alginate, β-cyclodextrin and trehalose) on the formation of nano-globular aggregates from normal (hsa) and glycated (ghsa) human serum albumin were studied; w...

Journal: :iranian journal of microbiology 0
r kasra–kermanshahi department of biological science, alzahra university, vanak, tehran, iran. j fooladi department of biological science, alzahra university, vanak, tehran, iran. s peymanfar department of biological science, alzahra university, vanak, tehran, iran.

background and objectives : probiotics including strains of lactobacillus spp. are living microorganisms including which are beneficial to human and animals health. in this study, lactobacillus has been isolated from corn silage in a cold region of iran by anaerobic culture. materials and methods : the bacteriological and biochemical standard methods were used for identification and phenotypic ...

2017
Y. W. Ewa-Choy B. Pingguan-Murphy N. A. Abdul-Ghani J. Jahendran K. H. Chua

BACKGROUND The three-dimensional (3D) system is one of the important factors to engineer a biocompatible and functional scaffold for the applications of cell-based therapies for cartilage repair. The 3D alginate hydrogels system has previously been shown to potentially promote chondrogenesis. The chondrocytic differentiation of co-cultured adipose-derived stem cells (ADSCs) and nasal chondrocyt...

Journal: :Biofabrication 2016
Yifei Jin Ashley Compaan Tapomoy Bhattacharjee Yong Huang

Freeform fabrication of soft structures has been of great interest in recent years. In particular, it is viewed as a critical step toward the grand vision of organ printing--the on-demand design and fabrication of three-dimensional (3D) human organ constructs for implantation and regenerative medicine. The objective of this study is to develop a novel granular gel support material-enabled, two-...

Journal: :Methods and applications in fluorescence 2016
Tatiana V Shkand Mykola O Chizh Iryna V Sleta Borys P Sandomirsky Anatoliy L Tatarets Leonid D Patsenker

The main goal of this study is to investigate a combination of viscosity-sensitive and viscosity-insensitive fluorescent dyes to distinguish different rheological states of hydrogel based biostructural materials and carriers in biological tissues and to assess their corresponding location areas. The research is done in the example of alginate hydrogel stained with viscosity-sensitive dyes Seta-...

Journal: :Stomatologija 2009
Rimas Surna Jonas Junevicius Evaldas Rutkauskas

THE OBJECTIVE The objective of this work is to prove that oral cavity fluids diffuse into alginate mass of impressions. In addition, the information is presented on the subject that disinfectants used for alginate impressions disinfection not only diffuse into alginate mass but penetrate deeper than oral cavity fluids. MATERIALS AND METHODS OF THE STUDY Three examination groups were formed fo...

Journal: :Journal of visualized experiments : JoVE 2011
Ariella Shikanov Min Xu Teresa K Woodruff Lonnie D Shea

The ovarian follicle is the functional unit of the ovary that secretes sex hormones and supports oocyte maturation. In vitro follicle techniques provide a tool to model follicle development in order to investigate basic biology, and are further being developed as a technique to preserve fertility in the clinic. Our in vitro culture system employs hydrogels in order to mimic the native ovarian e...

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