Abstract Background Dihydromyricetin (DHM), a flavonoid compound of natural origin, has been identified in high concentrations ampelopsis grossedentata and broad spectrum biological pharmacological functions, particularly regulating glucose lipid metabolism. The objective this research was to examine how DHM affected nonalcoholic fatty liver disease (NAFLD) its underlying mechanisms involved the progression NAFLD rat model subjected high-fat diet (HFD). Additionally, study examines cellular...

Polypropylene (PP)/montmorillonite (MMT) nanocomposites have been prepared by melt intercalation using organomontmorillonite and conventional twin screw extrusion. The dispersibility of silicate layers the montmorillonite in composites was investigated X-ray diffractometer transmission electron microscopy (TEM). are dispersed at nanometer level PP matrix, as revealed TEM results. tensile strength PP/MMT is not much improved compared with pure or filled composites. However, impact greatly...

Abstract By using the technology of sequential interpenetrating polymer network, a series novel damping materials based on polydimethylsiloxane (PDMS)/polyacrylate (PAC) matrix with polymethacrylate (PMAC) were synthesized. They have controllable broad transition peak spanning temperature range 150–220°C and medial value loss factor maximum 0.35–0.60. Dynamic mechanical analysis (DMA), differential scanning calorimetry (DSC), atomic force microscopy (AFM) applied to analyze characterize...

To explore the influencing factors of Yang deficiency constitution in traditional Chinese medicine (TCM) from perspective mathematics with use calculation formulas, so as to protect patients getting diseases caused by and provide suggestions for TCM disease prevention. Based on classification determination criteria implemented China Association Medicine, data 24 solar terms May 5, 2020 (Start Summer) April 20, 2021 (Grain Rain) identification were collected mobile system. The grey...

Abstract The synthesis and thermal properties of thermoplastic poly(urethane‐imide) (PUI) resins were studied. Model reaction studies on the reactions 4,4′‐diphenylcarbamatodiphenylmethane 4,4′‐diisocyanatodiphenylmethane with phthalic anhydride performed. We found that anhydrides urethane groups could take place under certain conditions. According to model studies, N ‐2‐methyl‐pyrrolidone was employed as a solvent, no catalyst used in polymerization. To restrain side groups, we adopted...

Abstract A new modifier for bismaleimide (BMI), 2,4,6‐tris(2‐allylphenoxy)‐1,3,5‐triazine (TAPT), with higher yield was prepared by a phase‐transfer catalyzing (PTC) procedure through the reaction of cyanuric chloride 2‐allylphenol in presence aq. NaOH using tetrabutyl ammonium bromide chloroform. The thermo‐homopolymerization behavior TAPT investigated differential scanning calorimetry (DSC), and results showed that does not polymerize on heating. copolymerization 4,4'–(bismaleimidophenyl)...

A series of new bismaleimides containing silicone linkages have been prepared via Diels–Alder reaction and bisfurans silicone; their molecular structures characterized by FTIR, NMR elemental analysis. The solubility the was tested in six types solvent different boiling point polarity, curing temperatures were determined DSC. thermal-oxidative stability cured networks investigated TGA glass transition measured DSC, revealing that are soluble low solvents range 206–285°C. DSC traces show...

Abstract A series of damping rubbers based on poly(meth)acrylate and poly(meth)acrylate‐containing silicone has been prepared. The dynamical mechanical properties were evaluated by using a dynamic viscoelastometer (DMA). detailed investigation is reported the relationship capability with their composition macromolecular architecture. Also discussed effect two kinds elastomers performance polyacrylate‐containing rubber. results indicate that, in vulcanized rubber systems, both statistical...

The adsorption and molecular orientation of phenyl disulfide 4-aminophenyl on silver surface has been investigated by the use Fourier transform (FT) enhanced Raman scattering (SERS). There is a concentration dependence adsorbed disulfides surface. Disulfides could be Ag as self-assembled, well oriented monolayers from very dilute solution. amino group exposed outwards metal can take part in chemical reactions with epoxy group. Modification at interface achieved for polymer/metal systems...

Aromatic sulfone ether diamine, bis[4-(4-aminophenoxy)phenyl]-sulfone (SED), was prepared by the nucleophilic aromatic substitution of 4,4′-dichlorodiphenylsulphone p-aminophenolate. The reaction conducted in presence excess potassium carbonate as a weak base, toluene dehydrating agent and N-methylpyrrolidone dipolar aprotic solvent. SED showed good solubility common organic solvents, such dioxan, tetrahydrofuran, butanone acetone. reacted with maleic anhydride to obtain bismaleimide,...

Abstract A new chain‐extension modifier for bismaleimide (BMI), 2,6‐di‐(4‐aminophenoxy)benzonitrile (DAPB), was synthesized through nucleophilic substitution of 2,6‐dichlorobezonitrile by 4‐aminophenol using anhydrous sodium carbonate as an acid acceptor, toluene a dehydrating agent, and N , ′‐dimethylacetamide (DMAC) dipolar aprotic solvent. Based on the diamine, another bismaleimide, 2,6‐bis(4‐maleimidophenoxy)benzonitrile (BMPB), also synthesized, first reaction DAPB with maleic anhydride...

Polypropylene (PP)/montmorillonite (MMT) nanocomposites have been prepared by melt intercalation using organomontmorillonite and conventional twin screw extrusion. The dispersibility of silicate layers the montmorillonite in composites was investigated X-ray diffractometer transmission electron microscopy (TEM). are dispersed at nanometer level PP matrix, as revealed TEM results. tensile strength PP/MMT is not much improved compared with pure or filled composites. However, impact greatly...

Abstract A new type of modified bismaleimide resin was obtained by copolymerization between tris(allylphenoxy)triazine monomer (TAPT) and an aromatic diamine‐chain‐extension [e.g., 4,4′‐diaminodiphenylmethane (DADPM)‐chain‐extension 4,4′‐bismaleimidodiphenylmethane (BMDPM)]. The three‐component‐polymer system had good processibility mechanical properties. Better results were when the weight ratio TAPT to DADPM‐chain‐extension BMDPM 30%. © 2004 Wiley Periodicals, Inc. J Appl Polym Sci 93: 475–480,

Abstract A novel allylphenoxytriazine monomer, 2,4‐di (2‐allylphenoxy)‐6‐ N,N ‐dimethylamino‐1,3,5‐triazine (DAPDMT) was prepared in one‐pot by reacting cyanuric chloride with 2‐allylphenol at first, and then directly treating the adduct ‐dimethylamine without separation. The monomer used to modify a popular commercial bismaleimide (BMI) resin, 4,4′‐bismaleimidodiphenyl methane (BMDPM), results showed that could effectively improve mechanical properties of BMDPM resin greatly decreasing heat...

To investigate the roles of reactive oxygen species (ROS) and integrin αvβ3 in palmitate-induced laminin expression human liver sinusoidal endothelial cells (HLSECs).The protein αv, β3 are increased by palmitate HLSECs a time- dose-dependent manner. NAC, ROS inhibitor, significantly inhibited up-regulation (P < 0.05). Palmitate markedly enhanced formation 0.05), which was not LM609, antibody αvβ3. synthesis attenuated LM609 NAC 0.05).HLSECs were treated with presence or absence (10 μg/ml)...

Abstract A novel aromatic ether nitrile monomer containing propenyl groups, 2,6‐di{2‐[( E )‐1‐propenyl]phenoxy} benzonitrile (DPPB), was synthesized by the reaction of 2,6‐dichlorobenzonitrile and 2‐allylphenol using anhydrous potassium carbonate as acid acceptor, N ‐methyl pyrrolidone dipolar aprotic solvent, toluene dehydrating agent. The chemical structure DPPB characterized FTIR 1 H‐NMR. used to modify a popular commercial bismaleimide, 4,4‐bismaleimidodiphenylmethane (BMDPM), improve...