Synthesis and Characterization of a Long, Rigid Photoswitchable Cross-Linker for Promoting Peptide and Protein Conformational Change

ChemBioChem ◽  
2008 ◽  
Vol 9 (13) ◽  
pp. 2147-2154 ◽  
Author(s):  
Fuzhong Zhang ◽  
Oleg Sadovski ◽  
G. Andrew Woolley
Keyword(s):  
Conformational Change ◽  
Synthesis And Characterization ◽  
Protein Conformational Change ◽  
Cross Linker

Synthesis and characterization of molecularly imprinted polymers with modified rosin as a cross-linker and selective SPE-HPLC detection of basic orange II in foods

2014 ◽  
Vol 6 (16) ◽  
pp. 6397-6406 ◽  
Author(s):  
Xiaoyan Li ◽  
Mei Li ◽  
Junjie Li ◽  
Fuhou Lei ◽  
Xiaomeng Su ◽  
...  
Keyword(s):  
Molecularly Imprinted Polymers ◽  
Solid Phase ◽  
Selective Extraction ◽  
Synthesis And Characterization ◽  
Orange Ii ◽  
Molecularly Imprinted ◽  
Imprinted Polymers ◽  
Cross Linker

A novel sample clean-up technique, i.e., molecularly imprinted solid-phase extraction (MISPE) combined with HPLC, was developed and validated for the selective extraction and determination of basic orange II in foods.

scholarly journals Sintesis dan karakterisasi polimer superabsorban dari akrilamida

2018 ◽  
Vol 11 (2) ◽  
pp. 84
Author(s):  
A. Zainal Abidin ◽  
G Susanto ◽  
N.M.T. Sastra ◽  
T Puspasari
Keyword(s):  
Absorption Capacity ◽  
Synthesis And Characterization ◽  
Superabsorbent Polymer ◽  
Ammonium Persulphate ◽  
Surface Contact Area ◽  
Acrylamide Monomer ◽  
Cross Linker ◽  
Short Time ◽  
High Absorption

Synthesis and Characterization of Superabsorbent from Acrylamide Superabsorbent polymer (SAP) is a material that can absorb water in a large amount in a short time. In this research, the polymer has been synthesized from acrylamide monomer (Am) using N,N methylene bisacrylamide (MBA)as a cross-linker and ammonium persulphate (APS) as an initiator. Effects of MBA and APS on the SAP characteristic were studied by varying composition of MBA and APS each of 0.1%-wt, 0.2 %-wt, 0.6 %-wt and 1.0 %-wt. SAP was characterized by measuring its absorption capacity to distilled water. Based on the experiment, the highest absorption capacity for 1 gram SAP is 14.5 gram water. The highest absorption is produced by SAP with APS 0.2 %-wt and MBA 0.6 %-wt. Further studies by using SEM showed that SAP which had high absorption capacity contained a lot of pores with the waving surface. Therefore, the surface contact area between SAP and water is high. Keywords: acrylamide, absorption capacity, superabsorbent polymerAbstrakSuperabsorbent Polymer (SAP) merupakan polimer yang dapat menyerap air dalam jumlah yang sangat banyak. Dalam penelitian ini, polimer tersebut disintesis dari monomer akrilamida menggunakan crosslinker N,N-metilene bisakrilamide (MBA) dan inisiator amonium persulfat (APS). Pengaruh crosslinker dan inisiator terhadap karakteristik SAP dipelajari dengan melakukan variasi komposisi APS dan (MBA) masing-masing sebesar 0,1 %-b, 0,2 %-b, 0,6 %-b, dan 1 %-b. Karakteristik produk SAP dipelajari dengan FTIR untuk menganalisis gugus fungsi yang terbentuk untuk menunjukkan bahwa polimerisasi betul terjadi dan produknya berupa SAP. Pengukuran kemampuan absorpsi SAP terhadap air destilasi menunjukkan bahwa kapasitas absorpsi terbesar yang dihasilkan oleh superabsorbent polymer dari penelitian ini sebesar 14,5 gram air dalam 1 gram produk SAP yang dibuat. Kapasitas terbesar ini dimiliki oleh SAP dengan 0,2 %-b APS dan 0,6 %-b MBA. Studi lebih lanjut dengan SEM menunjukkan bahwa SAP yang memiliki kapasitas absorpsi tertinggi itu mempunyai morfologi permukaan yang berombak dan jumlah pori yang tertinggi sehingga luas permukaan kontak antara SAP dan air juga tertinggi. Kata kunci: akrilamida, kapasitas absorpsi, superabsorbent polymer

scholarly journals Synthesis and characterization of thermosensitive hydrogels with both supramolecular and hyperbranched structures

e-Polymers ◽  
2007 ◽  
Vol 7 (1) ◽  
Author(s):  
Zhang Ping ◽  
Liu Qunfeng ◽  
Lan Yanxun ◽  
Shi Jianbo ◽  
Lu Mangeng
Keyword(s):  
Inclusion Complexes ◽  
Chain Transfer ◽  
Raft Polymerization ◽  
Synthesis And Characterization ◽  
New Novel ◽  
Reversible Addition ◽  
Thermosensitive Hydrogels ◽  
Cross Linker ◽  
Channel Type

Abstract New novel kinds of thermosensitive hydrogels with supramolecular structures were synthesized by reversible addition fragmentation chain transfer (RAFT) polymerization of N-isopropylacrylamide (NIPAM) and polypseudo rotaxanes in the presence of N,N- methylenebisacylamide (BIS) as a cross-linker. The polypseudorotaxanes were prepared by supramolecular self-assemblies of α- cyclodextrins threaded onto (4A-PEG) polymers. The structure of the hydrogels were characterized in detail with FTIR techniques. The analytical results demonstrated that a channel-type crystalline structure of inclusion complexes (ICs) remains in as-obtained hydrogels. Their swelling behavior was measured gravimetrically in the temperature range from 20 to 60 °C. The supramolecular structured hydrogels by RAFT polymerization (RAFT gels) showed accelerated shrinking kinetics to conventional hydrogel (CG), surprisingly.

scholarly journals Electron Beam Synthesis and Characterization of Acrylamide/Acrylic Acid Hydrogels Using Trimethylolpropane Trimethacrylate as Cross-Linker

2016 ◽  
Vol 2016 ◽  
pp. 1-14 ◽  
Author(s):  
Gabriela Craciun ◽  
Elena Manaila ◽  
Maria Daniela Stelescu
Keyword(s):  
Electron Beam ◽  
Acrylic Acid ◽  
Dose Range ◽  
Absorbed Dose ◽  
Radical Copolymerization ◽  
Synthesis And Characterization ◽  
Free Radical Copolymerization ◽  
Swelling Properties ◽  
Cross Linker

The purpose of the paper is to present the synthesis and characterization of hydrogels prepared by free-radical copolymerization of acrylamide and acrylic acid in aqueous solutions using potassium persulfate as initiator and trimethylolpropane trimethacrylate as cross-linker, via the radiation technique. The samples were subjected to electron beam treatment in the dose range of 2 to 4 kGy and the influence of the absorbed dose and amount of cross-linker on the swelling properties, diffusion coefficient, and network parameters of hydrogels was investigated. A possible reaction mechanism for acrylamide/acrylic acid/trimethylolpropane trimethacrylate hydrogels was also suggested. The structure and morphology of hydrogels were characterized by Fourier Transform Infrared Spectroscopy and Scanning Electron Microscopy.

Synthesis and characterization of triptycene type cross-linker and its use in photoinduced curing applications

Polymer ◽  
2010 ◽  
Vol 51 (4) ◽  
pp. 825-831 ◽  
Author(s):  
Sahin Ates ◽  
Binnur Aydogan ◽  
Lokman Torun ◽  
Yusuf Yagci
Keyword(s):  
Synthesis And Characterization ◽  
Cross Linker
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