دانلود رایگان مقاله لاتین سلول استافیلوکوکوس اورئوساز سایت الزویر
عنوان فارسی مقاله:
گسترش مقاومت در شرایط آزمایشگاهی برای کیتوزان مربوط به تغییرات در ساختار پوشش سلول استافیلوکوکوس اورئوس
عنوان انگلیسی مقاله:
Development of in vitro resistance to chitosan is related to changes in cell envelope structure of Staphylococcus aureus
سال انتشار : 2016
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مقدمه انگلیسی مقاله:
1. Introduction
Chitosan is a linear high molecular weight heteropolysaccharide, consisting of N-acetyl-d-glucosamine and d-glucosamine units, linked together by ˇ-(1→4) glycosidic bonds; it is produced from chitin by exhaustive alkaline deacetylation (Kumar, 2000). Since the relative amount of the two monosaccharides may vary, the term chitosan usually refers to a family of copolymers with various fractions of acetylated units (Singla & Chawla, 2001;Tharanathan & Kittur, 2003). In contrast to most of the naturallyoccurring polysaccharides, chitosan is an example of a highly basic polysaccharide with a high charge density. Its unique chemical structure, combined with its physico-chemical and biological characteristics, allow for a wide range of applications ranging from pharmaceutical, cosmetic, medical, food and textile to agricultural applications (Raafat & Sahl, 2009). Recent developments in the field of biomaterials have led to a renewed interest in this biopolymer, especially with an increasing number of publications describing the antimicrobial potentials of chitosan and its derivatives against filamentous fungi, yeasts and bacteria (Champer et al., 2013; Galván Márquez et al., 2013). It is generally assumed that the polycationic nature of chitosan contributes to its interaction with anionic microbial cell surface components, resulting in random multiple detrimental events which may each contribute to the overall efficacy (Je & Kim, 2006; Raafat, Bargen, von Haas, & Sahl, 2008; Torr, Chittenden, Franich, & Kreber, 2005; Zakrzewska, Boorsma, Brul, Hellingwerf, & Klis, 2005). Our previous data clearly indicate that the initial contact between chitosan and the negatively-charged cell wall polymers (teichoic acids) is indeed driven by electrostatic interactions. This leads to impairment and destabilization of membrane function with subsequent leakage of cellular components, and ultimately to
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کلمات کلیدی:
Staphylococcus - MicrobeWiki https://microbewiki.kenyon.edu/index.php/Staphylococcus Jump to Cell Structure and Metabolism - Staphylococcus aureus is a gram positive bacteria, which means that the cell wall of this bacteria consists of a ... The structure of the cell wall of Staphylococcus aureus studied with ... www.sciencedirect.com/science/article/pii/0014579382810429 by J Torbet - 1982 - Cited by 6 - Related articles Oct 18, 1982 - The cell wall complex was extracted from Staphylococcus aureus and characterized in suspension by means of small-angle neutron scattering ... Images for cell envelope structure of Staphylococcus ... Image result for cell envelope structure of Staphylococcus aureus Image result for cell envelope structure of Staphylococcus aureus Image result for cell envelope structure of Staphylococcus aureus Image result for cell envelope structure of Staphylococcus aureus Image result for cell envelope structure of Staphylococcus aureus More images for cell envelope structure of Staphylococcus aureus Report images People also ask Why Gram negative bacteria are resistant to antibiotics? How big is staphylococcus? Why bacterial cell wall is negatively charged? What is the cell envelope? Feedback Release of protein A from the cell wall of Staphylococcus aureus - PNAS www.pnas.org/content/111/4/1574.full.pdf by S Becker - 2014 - Cited by 35 - Related articles Jan 28, 2014 - Staphylococcal protein A (SpA) is anchored to the cell wall envelope ..... Structure of S. aureus peptidoglycan comprised of the repeating di-. Searches related to cell envelope structure of Staphylococcus aureus staphylococcus aureus structure and function staphylococcus aureus photosynthesis does mycoplasma pneumoniae have a cell wall what type of cell wall do the enterobacteriaceae bacteria have staphylococcus aureus oxygen respiration does staphylococcus aureus have a nucleus is staphylococcus aureus photosynthetic structure of streptococcus
