نتایج جستجو برای: poly hema

تعداد نتایج: 81092  

پایان نامه :وزارت علوم، تحقیقات و فناوری - دانشگاه تبریز - دانشکده شیمی 1390

پلیمرهای حساس حرارتی به دلیل رفتار هوشمند و برگشت پذیر در پاسخ به تغییرات محیطی به ویژه تغییرات دمایی توجه زیادی به خود جلب کرده اند.از این رودر این پروژه سنتز پلیمرهای ستاره ای - n ایزوپروپیل اکریلامید با کومنومر ایتاکونیک اسید و همچنین سنتز پلیمرهای ستاره ای - n ایزوپروپیل اکریلامید با کومنومر2-هیدروکسی اتیل متاکریلات با هسته ی گلوکزبه روش atrp برای اولین بار انجام می شود.برای این منظور ابتدا...

Journal: :Biointerphases 2009
Shafi Arifuzzaman Ali E Ozçam Kirill Efimenko Daniel A Fischer Jan Genzer

Amphiphilic polymer coatings were prepared by first generating surface-anchored polymer layers of poly(2-hydroxyethyl methacrylate) (PHEMA) on top of flat solid substrates followed by postpolymerization reaction on the hydroxyl terminus of HEMA's pendent group using three classes of fluorinating agents, including organosilanes, acylchlorides, and trifluoroacetic anhydride (TFAA). The distributi...

1999
Christopher S. Brazel Nikolaos A. Peppas

Water and solute or drug transport in crosslinked polymeric materials was investigated to determine the effects of polymer morphology, composition and solute properties on transport behavior. Two crosslinked polymer systems, poly(2-hydroxyethyl methacrylate-co-methyl methacrylate) (P(HEMA-co-MMA)) and poly(vinyl alcohol) (PVA), were used in water transport and solute release experiments. Struct...

1997
Nikolaos A. Peppas

The goal of this research was to define the controlling parameters affecting transport of drugs and proteins through poly(acrylic acid), PAA, and poly(acrylic acid-co-2-hydroxyethyl methacrylate), P(AA-co-HEMA). The hydrogel formulation variables investigated included the amount of crosslinking agent and non-ionizable comonomer (i.e. HEMA), which ultimately defined the mesh size available for s...

2013
Andrea G. P. R. Figueiredo Ana R. P. Figueiredo Ana Alonso-Varona Susana C. M. Fernandes Teodoro Palomares Eva Rubio-Azpeitia Ana Barros-Timmons Armando J. D. Silvestre Carlos Pascoal Neto Carmen S. R. Freire

A series of bacterial cellulose-poly(2-hydroxyethyl methacrylate) nanocomposite films was prepared by in situ radical polymerization of 2-hydroxyethyl methacrylate (HEMA), using variable amounts of poly(ethylene glycol) diacrylate (PEGDA) as cross-linker. Thin films were obtained, and their physical, chemical, thermal, and mechanical properties were evaluated. The films showed improved transluc...

Journal: :Environmental research & technology 2021

Although, boron (B) is an essential micronutrient for plants, animals and human beings; at high concentration of in water resources may be hazardous living being. Hence the has to reduced down suggested level by World Health Organization safe use irrigation drinking. The present study examines pollution groundwater suggests alternative sorbent remove it from sources used poly-2-Hydroxyethyl met...

2013
Ali Acikgöz Shibashish Giri Man-Gi Cho Augustinus Bader

Poly (2-hydroxyethyl methacrylate) (HEMA) has been used as a clinical material, in the form of a soft hydrogel, for various surgical procedures, including endovascular surgery of liver. It is a clear liquid compound and, as a soft, flexible, water-absorbing material, has been used to make soft contact lenses from small, concave, spinning molds. Primary rat hepatocyte spheroids were created on a...

Journal: :Artificial Cells, Nanomedicine, and Biotechnology 2016

Journal: :The British journal of ophthalmology 1981
R B Packard A Garner E J Arnott

A soft material (poly-HEMA) has been implanted into a number of rabbit eyes in order to evaluate its use in lens implantation following cataract surgery. No reaction to the implant was seen on light microscopy of the sectioned enucleated eyes.

2014
Constantinos P. Tsangarides Ali K. Yetisen Fernando da Cruz Vasconcellos Yunuen Montelongo Malik M. Qasim Timothy D. Wilkinson Christopher R. Lowe Haider Butt

Electrical Engineering Division, Department Cambridge, CB3 0FA, UK Department of Chemical Engineering and Tennis Court Road, Cambridge, CB2 1QT, U School of Mechanical Engineering, Universit B15 2TT, UK. E-mail: [email protected] † Electronic supplementary information about materials, equipment, silane cou and photosensitisation of poly(HEMA)  DOI: 10.1039/c3ra47984f ‡ These authors contribute...

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