In this study, we demonstrated an oxidative method with free radical to generate 3,5,4'-trihydroxy-trans-stilbene (trans-resveratrol) metabolites and detect sequentially by an autosampler coupling with liquid chromatography electrospray ionization tandem mass spectrometer (LC-ESI-MS/MS). In this oxidative method, the free radical initiator, ammonium persulfate (APS), was placed in a sample bott...

Polymers can be prepared using chemical and/or electrochemical methods of polymerization (see Chap. 2), although most redox polymers have been synthesized by chemical polymerization. Electrochemically active groups are either incorporated into the polymer structure inside the chain or included as a pendant group (prefunctionalized polymers), added to the polymer phase during polymerization, or ...

1 Methods Design, data-processing and modelling: DNA sequences were designed using our own algorithms based on sequence symmetry minimization implemented in Matlab and C (available at http://www.dna.caltech.edu/DNAdesign/). Curve fits for persistence length data and models for lattice strain energies were calculated in Matlab. Molecular models were constructed and visualized using a combination...

This is a process where the graphene fi lm is covered in a stabilizing polymer layer and the copper is chemically etched away. The polymer graphene stack can then be placed onto the destination substrate and subsequently the polymer is dissolved in an appropriate solvent. The overwhelming majority of reported cases use Poly(methyl methacrylate) (PMMA) for the polymer and either iron chloride (F...

A novel strategy was developed to synthesize uniform semi-interpenetrating polymer network (semi-IPN) microspheres by premix membrane emulsification combined with one-step polymerization. Synthesized poly(acrylic acid) (PAAc) polymer chains were added prior to the inner water phase, which contained N-isopropylacrylamide (NIPAM) monomer, N,N1-methylene bisacrylamide (MBA) cross-linker, and ammon...

Techniques in resin blending are simple and efficient method for improving the properties of polymers, and have been used widely in polymer modification field. However, polymer latex blends such as the combination of latexes, especially the latexes with water-soluble polymers, were rarely reported. Here, we report a core-shell composite latex synthesized using methyl methacrylate (MMA), butyl a...

We reported the functionalization of multiwalled carbon nanotube (MWCNT) with 4-aminobenzoic acid by a ‘‘direct’’ Friedel–Crafts acylation reaction in a mild polyphosphoric acid (PPA)/phosphorous pentoxide (P2O5) medium. The resulting 4aminobenzoyl-functionalized MWCNT (AF-MWCNT) was used as a platform for the grafting of polypyrrole (PPy) in ammonium persulfate (APS)/aqueous hydrochloric acid ...

BACKGROUND Persulfate salts are the main cause of occupational asthma (OA) in hairdressers. The aim of this study was to verify whether ammonium persulfate ((NH(4))(2)S(2)O(8), AP) is capable of triggering an asthma-like response in mice. METHODS BALB/c mice were dermally treated on days 1 and 8, with dimethylsulfoxide (DMSO), 1% AP or 5% AP (20 microl/ear). On day 15, the auricular lymph nod...