نتایج جستجو برای: nipam polymer

تعداد نتایج: 93135  

Journal: :Frontiers in bioscience 2010
Zhiqi Zhang Anthony Conway Ann Beal Salamone Eric T Crumpler Xueji Zhang Chen-zhong Li

This research pertains to a new class of liquid bandage polymers which are promising for assisting advanced wound healing by serving as substrates to promote cell viability and proliferation. Amphiphilic nitrogen-containing polymer poly (3-methacryloyloxypropyltris (trimethylsiloxy)silane-co-N-isopropylacrylamide) (poly (TRIS-co-NIPAM)) was synthesized and investigated with further comparison t...

2012
Ling-Ling Hsieh Kai-Yuan Cheng Bor-Tsung Hsieh

The response of thin polymer gel cassettes (called NIPAM gels) to ionizing radiation was investigated in this study. The NIPAM gels were prepared from gelatin, N-isopropyl acrylamide, tetrakis (hydroxymethyl) phosphoniumchloride, and N,N'-methylene-bis-acrylamide. Gel cassettes were irradiated in a phantom using a linear accelerator, and the polymerization morphology of irradiated NIPAM gel was...

Journal: :Journal of pharmaceutical sciences 2002
Emmanuelle Roux Romain Stomp Suzanne Giasson Michel Pézolet Pierre Moreau Jean-Christophe Leroux

The aim of this study was to characterize a pH-sensitive liposome formulation bearing a terminally alkylated N-isopropylacrylamide (NIPAM) copolymer with regard to its pH responsiveness, surface properties, and pharmacokinetics. The interacting forces between two lipid bilayers bearing the anchored NIPAM copolymer were measured with a surface force apparatus. The pH-triggered content release wa...

2015
Roghayeh Khodadadi Azim Khajeali Ali Reza Farajollahi Parisa Hajalioghli Noorallah Raeisi

INTRODUCTION The main objective of this study was to investigate the possibility of replacing electrophoresis cross-linker with non-electrophoresis N, N'-methylenebisacrylamide (BIS) in N-isopropyl acrylamide (NIPAM) polymer gel and its possible effect on dose response. METHODS NIPAM polymer gel was prepared from non-electrophoresis grade BIS and the relaxation rate (R2) was measured by MR im...

2016
Jeffrey M. Ting Swapnil Tale Anatolii A. Purchel Seamus D. Jones Lakmini Widanapathirana Zachary P. Tolstyka Li Guo Steven J. Guillaudeu Frank S. Bates Theresa M. Reineke

Polymeric excipients are crucial ingredients in modern pills, increasing the therapeutic bioavailability, safety, stability, and accessibility of lifesaving products to combat diseases in developed and developing countries worldwide. Because many early-pipeline drugs are clinically intractable due to hydrophobicity and crystallinity, new solubilizing excipients can reposition successful and eve...

Journal: :Applied spectroscopy 2009
Boguslaw Szczupak Alan G Ryder Denisio M Togashi Yuri A Rochev Alexander V Gorelov Thomas J Glynn

Thin polymer films are important in many areas of biomaterials research, biomedical devices, and biological sensors. The accurate in situ measurement of multiple physicochemical properties of thin polymer films is critical in understanding biocompatibility, polymer function, and performance. In this work we demonstrate a facile spectroscopic methodology for accurately measuring the micro-polari...

Journal: :Faraday discussions 2017
Qiong-Xin Hua Bo Xin Jun-Xia Liu Ling-Xi Zhao Zu-Jing Xiong Tao Chen Ze-Qiang Chen Chong Li Wen-Liang Gong Zhen-Li Huang Ming-Qiang Zhu

We report the design and synthesis of a tetraphenylethene substituted with naphthalimide at the 4, 6 positions, named NI-2TPE. NI-2TPE exhibits strong solvent-dependent emission properties with combined ICT and AIE characteristics in THF-H2O systems. This probe was used directly on test papers to distinguish normal organic solvents using their emission colours under UV light based on its AIE an...

Journal: :Langmuir : the ACS journal of surfaces and colloids 2004
X Zhu J DeGraaf F M Winnik D Leckband

Environmentally responsive, water-soluble polymers have a wide variety of uses ranging from drug delivery to viscosity modifiers. Their utility lies in the ability to use environmental perturbations to dramatically alter the material properties. Here, we describe the interfacial properties of a hydrophobically modified copolymer of N-isopropylacrylamide and glycinylacrylamide (NIPAM-N-Gly-(C18)...

2016
Kai-Yuan Cheng Ling-Ling Hsieh Cheng-Ting Shih

Polymer gel dosimeters have been proven useful for dose evaluation in radiotherapy treatments. Previous studies have demonstrated that using a polymer gel dosimeter requires a 24 h reaction time to stabilize and further evaluate the measured dose distribution in two-dimensional dosimetry. In this study, the short-term stability within 24 h and feasibility of N-isopropylacrylamide (NIPAM) polyme...

Journal: :Bioseparation 2000
J Persson H O Johansson I Galaev B Mattiasson F Tjerneld

A set of new polymers that can be used as phase forming components in aqueous two-phase systems is presented. All polymers studied have thermoseparating properties i.e. form one separate polymer enriched phase and one aqueous solution when heated above the critical temperature. This property makes the polymers attractive alternatives to the polymers used in traditional aqueous two-phase systems...

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