in this study, doxycycline hyclate release behavior from in situ forming drug delivery systems investigated. these systems based on poly()lactide-co-glycolide)(50:50 dissolved in n-methyl-2-pyrrolidone that were evaluated in different concentrations. these systems are useful for local treatment of periodontal diseases. uv spectroscopy is used to determine drug concentration in release medium. a...

In studying of the in situ gravitational concentration process part feature for placer, the technological ability to transform the in situ massif placer structure is evident. The two main processes involved in altering the massif in situ have been examined and outlined in detail. The in situ disintegration of massif material results in a new massif gravitational stratification structure. Regula...

a copolymer of styrene and methyl styrene was synthesized by nitroxide - mediated “living” free radical polymerization )nmp). n-bromosuccinimide was used as a brominating agent to obtain a copolymer with bromine as its end group. this brominated copolymer was used as macro initiators for atom transfer  radical  polymerization  (atrp).  chemical  modifcation  of  the  clay  and transformation of...

Grafting-from ATRP protocols using fluoropolymers as substrates are very often used. Actual positive proof that is the mechanism at work in grafting or occurred all scarce. This perspective article gives an overview of most relevant examples such well possible other mechanisms grafting.

The atom transfer radical polymerization (ATRP)-based continuous assembly of polymers (CAP) is a promising approach for fabricating thin film composite (TFC) membranes high flux. Here, we report the preparation CO2-selective TFC mixed matrix (MMMs) by incorporating different amounts [Cu24(m-bdc)24(EG)3(DMF)12] (EG3-MOP) nanocages (e.g., 2.5, 5, and 10 wt%) as CO2-philic fillers in poly(poly(eth...

polyacrylontrile synthesis, via atom transfer radical polymerization, is studied in various initiator concentrations, transitional metal catalyst and different concentrations of cubr2. the variations of monomer conversion and the lin-earity of semi-logarithmic kinetic profile which is the evidence of living polymerization and constant radical concentration in the reaction medium, were revealed ...

Addition of water to organic solvents enhances the rate atom transfer radical polymerization (ATRP). To understand origin this enhancement, effects H2O on redox properties [CuIITPMA]2+ and [BrCuIITPMA]+ (TPMA=tris(2-pyridylmethyl)amine), ATRP equilibrium (KATRP) activation (kact) constants methyl 2-bromopropionate by [CuITPMA]+ were investigated in CH3CN, DMF DMSO their mixtures with acrylate (...

Herein, mono- and disubstituted thioxanthones have been synthesized introduced as photosensitizers of iodonium salt for cationic free-radical photopolymerization epoxy an acrylate monomer, respectively. Photoinitiation activity these molecules was verified during processes performed upon exposure to visible LEDs 420, 455, 470 nm. The kinetics the followed using FT-IR spectroscopy. Moreover, dev...