Abstract:The total antioxidant activity of essential oils and extracts from Atractylodes chinensis and A. chinensis preparata. was evaluated by three methods, namely, 1-diphenyl-2-picryl-2-picrylhydrazyl (DPPH) radical scavenging,〔2,2-azino-bis-3-ethylbenzothiazoline-6-sulfonic acid〕diammonium salt (ABTS) radical scavenging,and ferric reducing antioxidant power(FRAP) assay. The results showed that the ethyl acetate extract of Atractylodes chinensis had higher activity (DPPH: IC50=6.03 ug/mL; ABTS: IC50=3.59 ug/mL: FRAP: FRAP =3186.67 umol TE/g ), and its antioxidant activity was significantly decreased after stired by wheat bran. This paper clearly shows that Atractylodes chinensis is a good natural resource of antioxidants。

Abstract:The innovation and benefits of five awards and winners of the US Presidential Green Chemistry Challenge(PGCC) Awards Program in 2010 are introduced：①The Dow Chemical Company and BASF Chemical Company were awarded greener synthetic pathways award because of their innovative, environmentally benign production of Propylene Oxide via Hydrogen Peroxide. ②Merck & Co., Inc. and Codexis, Inc. were awarded greener reaction conditions award because of their greener manufacturing of Sitagliptin enabled by an evolved Transaminase.③The Clarke Company was awarded designing greener chemicals award because of NatularTM Larvicide: adapting Spinosad for Next-Generation mosquito control.④LS9, Inc. was awarded small business award because of microbial production of renewable PetroleumTM Fuels and Chemicals.⑤Ph.D. J. C.Liao of University of California, Los Angeles was awarded academic award because of his Recycling Carbon Dioxide to Biosynthesize Higher Alcohols.

Abstract:A Synthesis route of 2-mercapto-5-methoxyimidazo[4,5-b]pyridine was discussed. The router was : 2,6-dichloropyridine as the starting material was reacted with methanol/sodium hydroxide, after treated by potassium nitrated/concentrated sulfuric acid, then ammoniation to give 2-amino-6-methoxy-3-nitropyridine(III) which was finally reduced by tin chloride under 75℃ for 4h and cyclized by carbon disulfide to give the target compound .The overall yield reached 43.6%. The structure of product was characterized by IR, 1H-NMR and MS spectra.

Abstract:In this article, the advances in one-dimensional TiO2 nanomaterials are reviewed. Main basic synthetic methods, modification and photocatalytic degradation mechanism for TiO2 with one-dimensional nanostructure have been described in detail. The applications and some problems of such materials in photocatalytic degradation and releted other fields have been prospected. The 45 references are cited.

Abstract:Tin oxide (SnO2) microspheres with an average 2-3 μm in diameters have been successfully synthesized using SnCl4 and NaOH through a rapid hydrothermal process heated by microwave in the presence of 1-butyl-3-methyl imidazolium tetrafluoroborate ([BMIM][BF4]). Through characterization by X-ray powder diffraction (XRD), scanning electron microscopy (SEM), and transmission electron microscopy (TEM), thermal analysis and N2 physical adsorption, the structure of the SnO2 microspheres is proposed.

Abstract:The Non-isocyanate Polyurethane（NIPU）- Epoxy Resins were prepared by methoxyl PPG cyclic carbonate、diethylenetriamine(DETA) and epoxy resins. The structure of NIPU was confirmed using FT-IR. The microscopic structure of the resins was observed by SEM. The Hardness(pencil) of the coating membrane show up H type. And the coating would not bubbling, discoloring, peeling respectively in the water(96h), gasoline(48h) and salt fog(500h), and it has excellent adhesion for metal substrate.

Abstract:2,6-dichloroanisole(DCA) was prepared from 2,6-dichlorophenol(DCP) in the presence of potassium carbonate (K2CO3) and phase transfer catalyt(PTC), using dimethyl carbonate (DMC) as methylating reagent instead of conventional toxic reagents. The best yield(87.3%) of DCA and conversion (100%) of DCP were obtained under optimized conditions that polyethylene glycol 400 (PEG-400) was used as PTC, x(PEG-400)=0.2%, n(DMC):n(DCP):n(K2CO3)=0.1:0.05:0.001, the reaction temperature 150 oC, the reaction time 5 h. The repeat experiments showed that the technology possed a good repeatability under above optimum conditions.

Abstract:With dodecylamine，methyl acrylate and terephthaloyl chloride as raw material, Sodium N,N′-dilauroylterephthaloylamide propionate acid (SDPA-12) is synthesized by addition, amidation reaction and saponification. The influences of the reaction temperature, the reaction time and the ratios of reactants on the conversion in the amide reaction were investigated. The optimum reaction conditions were: n ( N-dodecyl-β-amino propionate acid methyl ester )：n (terephthaloyl chloride) = 2.2：1, reaction temperature is 35 ℃ and reaction time is 8 h, under these conditions, the conversion of terephthaloyl chloride is 68.7%. The SDPA-12’s structure were proved by Elemental analyzer, IR and NMR, (The SDPA-12’s structure were proved by confirming DPA-12’s structure, DPA-12: N,N′-dilauroylterephthaloylamide propionate acid). Experimental results show that SDPA-12 had a good surface activity, which the surface tension is 27.09 mN/m, and the critical micelle concentration is 1.83?0-5mol/L.

Abstract:The phase behavior of the microemulsion for the quaternary system of the alkylethoxyglucoside (AEG) / alkylethercarboxylate (AEC) / alcohol / acetochlor / water has been studied with ternary phase diagram, the effects of different alcohols and different alcohol-contents on acetochlor microemulsion were discussed and transformation of microstructure of the acetochlor microemulsion was studied by means of conductivity measurement. The results show that the area of microemulsion region decrease as the carbon chain of alcohol molecules increasing, and the liquid crystal region form and increase. When alcohol is n-butanol, the biggest microemulsion region area is corresponds to a certain content of n-butanol.

Abstract:Abstract: A new kind of cationic trisiloxane surfactant (CTSS) was synthesized by the ring-opening reaction of polyether epoxy group trisiloxane (PEETS) with diethanolamine. PEETS was prepared by hydrosilylation from 1,1,1,3,5,5,5-heptamethyltrisiloxane (MDHM) and allyl polyoxyalkylene glycidol ether (APEE) in the presence of platinum catalyst. The chemical structure of CTSS was characterized by IR and 1H-NMR. The interfacial properties of CTSS were mensurated. Experimental results showed as follows. The yields of PEETS and CTSS are 90.6% (based on MDHM and APEE) and 91.8% (based on PEETS and DEA), respectively. The viscosity and refractive index of CTSS are 2 600 mPa•s and 1.4742, respectively. In the critical micelle concentration of 8.7×10-4 mol•L-1, the surface tension of CTSS aqueous solution reduced to approximately 25.8 mN•m-1. The saturated adsorption, single CTSS average areas on saturated absorption layer and micellization standard free energies are 4.9×10-6 mol•m-2, 0.34 nm2 and -27.4 kJ•mol-1, respectively.

Abstract:A new geometrial immobilization matrix with PVA fibers was introduced to enhance lactic acid production by immobilized Rhizopus oryzae. Compared to free cell fermentation, final lactic acid increased 25% (51.13g/L vs.40.9g/L) and fermentation time reduced 33% (48 h vs. 72 h) in shake-flasks. The immobilized-cell fermentation was evaluated for its long- term performance in both of shake-flasks and 1L bubble-column bioreactor operated in a repeated batch mode for 13 and nine cycles respectively. The overall yield in shake-flask was 65 %, corresponding to a volumetric productivity of 1.1 g/(L·h). Moreover, the highest lactic acid concentration in the bubble-column bioreactor was 55.68% with a yield of 69.6% from consumed glucose. This result suggested the promising use for the immobilization of Rhizopus oryzae in PVA fibers.

Abstract:The structure and property of products which were synthesized with TEA and/or TEAOH as template(s) have been studied deeply by XRD, SEM and NH3-TPD techniques, and the catalytic performance of products have been investigated in conversion of methnaol-to-olefine (MTO) fixed-bed process. The results from the XRD, SEM, NH3-TPD measurements showed that the types and ratios of the templates had a great influence on the structure, crystal size and acidity of the products. In the dual-template system, the pure SAPO-34 molecular sieves could be obtained as TEAOH/TEA=0.037-0.186, and the SAPO-34 molecular sieve with smaller and uniformer crystal, medium acidity could be obtained as TEAOH/TEA=0.093. The catalytic evaluation showed that the SAPO-34 synthesized with TEAOH/TEA=0.093 exhibited higher selectivity to light olefin (C2=-C4=) (94.98%), longer lifetime (415min) than the SAPO-34 prepared with the single TEA (TEA/Al2O3=2.15, 88.22%, 170min) or TEAOH (TEA/Al2O3=2.0, 89.29%, 165min) as template, and its coke deposition rate have fallen remarkly (0.016%/min).

Abstract:Using coconut-water as main culture medium, carboxymethyl cellulose -bacterial cellulose(CMC-BC) materials were obtained by adding carboxymethyl cellulose (CMC) into the Acetobacter xylinum culture system. The results suggested that CMC-BC polysaccharide produced with coco-nut water had shorter fermentation period and higher yield. And the added CMC can increase the productivity. When 0.6% (w/v%) CMC was added, the yield of dried product film was 10.41 mg/ml compared to 4.73 mg/ml in the control. Their FT-IR spectra suggested that CMC were incorporated into the BC in which the absorption of a carbonyl group at around 1598cm-1 appeared while no appearance in that of BC. Their properties were determined by X-ray diffraction (XRD), scaning electron microscopy(SEM) and thermogravimetric analysis(TGA). The CMC-BCs have the superior properties when the concentration of added CMC were ranging from 0.2% to 1.8%.

Abstract:Maleic anhydride was selectively hydrogenated into succinic anhydride over modified skeletal Ni under mild conditions. Effects of different solvents, initial concentration of maleic anhydride, reaction temperature and pressure have been investigated. Under the optimized reaction conditions of 0.2 MPa, 30 ℃ and using dioxane as solvent, the conversion of maleic anhydride and the selectivity of succinic anhydride are both close to 100% in 60 minutes. The reaction is a pseudo-zero order reaction, and the apparent activation energy of the catalytic hydrogenation of maleic is 27.1 kJ/mol.

Abstract:According to the structure rules of sandalwood compounds, 3-terpenylcyclohexanol was prepared. 3-terpenylcyclohexanol was synthesized from 3-bromophenol via protection reaction、Grignard reaction and hydronation. The total yield of the three steps was 44% and the ratio of trans/cis was about 1:1. The product had moody, floral with sandalwood flavor. The novelty of this research was testified by the Mininstry of Education Novelty Search Workstations (L06) on June 27, 2008. The testified number was L06-080103.

Abstract:The pretreatment technique of microwave-assisted extraction coupled to headspace solid-phase microextraction (MAE–HS-SPME) was investigated on the extraction of aroma components from Cinnamon. The extracted volatiles were analyzed by gas chromatography-mass spectrometry(GC-MS) method, and the determination results were compared with that of simultaneous distillation and extraction (SDE) and HS-SPME methods. The results showed that the optimal extraction conditions of MAE–HS-SPME were extracting 4.5min at 120W microwave power from 10 g sample in 100mL deionized water using a 100 ?m polyacrylate (PA) fiber, and then desorbing for 20 s at 250 ℃. The GC-MS analysis results showed that 62 components were identified and accounted for 95.60% of the total peak areas. The main volatiles were the same as that separated from HS-SPME fiber and SDE method. The main volatiles were 3-phenyl-2-propenal, ?-cubebene, 1-methoxy-4-[1-propenyl]-benzene, 4,7-dimethyl-1-[1-methylethyl]-1,2,4a,5,6,8a- hexahydro-naphthalene, etc. The components extracted by MAE–HS-SPME covered almost all the components extracted by HS-SPME and SDE. The total number of the components extracted by MAE–HS-SPME was 18 more than that extracted by HS-SPME and 26 more than that extracted by SDE. The results indicated that MAE–HS-SPME is a high performance pretreatment method for the analysis of aroma components in Cinnamon.

Abstract:Several new aroyl ureas IIIa~e were synthesized by reaction of 2-amino-5-(3-pyridyl)-1,3,4-thiadiazole with substituted benzoyl isocyanates, in the yield of 69.5%, 67.2%, 73.1%, 66.8% and 71.6% respectively. The structures of the products were confirmed by IR, 1H NMR, MS and elemental analysis. The plant-growth regulating activities were tested on the title compounds. The results of preliminary tests indicated that these compounds exhibit some degree of auxin activity and relatively good cytokinin activity at the concentration of 10 mg/L, where the promoting rates towards cytokinin of N-(4-bromobenzoyl)-N'-[5-(3-pyridyl)-1,3,4-thiadiazol-2-yl]urea (IIIc) and N-[4-(trifluoromethyl)benzoyl]-N'-[5-(3-pyridyl)-1,3,4-thiadiazol-2-yl]urea (IIIe) reach above 40%.

Abstract:Abstract: β-cyclodextrin polymer (β-CDP) microspheres were synthesized in inverse emulsion with β-cyclodextrin as material and epichlorohydrin as crosslinking agent. The L16（45）orthogonal test was used to obtain optimum technological parameters. The polymer microspheres were characterized by Scan electron microscope, FT-IR spectroscopy, thermogravimetric analysis (TGA) and X-ray diffraction (XRD). The results indicated that the best ratio of epichlorohydrin to β-cyclodextrin was 15∶1, the quantity of emulsifier was 1.2g, the quantity of kerosene was 60mL emulsifying temperature was 70℃ and the emulsifying time was 5h. Influence factors were emulsifying temperature, emulsifying time, the quantity of emulsifier, the ratio of epichlorohydrin to β-cyclodextrin , weight ratio of oil to water in order. The particle diameter distribution of those β-CDP microspheres under optimal conditions was relative uniform. The surface of the particles was smooth. They showed amorphous aggregate state and thermal stablity. The coating of the chromatograph was strong.

Abstract:The sodium alginate (SA) cation layer and the chitosan (CS) anion layer were modified by copper phthalocyanine tetrasulfonic acid (CuTsPc) and copper tetraaminophthalocyanine (CuTAPc) to prepare the CuTsPc-SA/CuTAPc-CS bipolar membrane(BPM)，which was used as a separator in an electrolysis cell for paired electro-generation of L-cysteine and L-cysteic acid. Experimental results showed that CuTsPc and CuTAPc promoted water spiliting in the interlayer and greatly decreased the membrane impedance and IR drop of the modified BPM. The IR drop of CuTsPc-SA/CuTAPc-CS BPM was only 0.3V in 1 mol/L Na2SO4 solution at 45 mA/cm2. Based on an overall consideration of current efficiency and yield, the optimum current density during the process of electrolysis was 35 mA/cm2.

Abstract:Abstract: A tertiary amine type cationic starch – starch–methylene dimethylamine hydrochloride (SMMAHC) with different degree of substitution (DS) was prepared by the reaction of corn starch with cationic reagent hydroxymethyl dimethylamine hydrochloride (HMMAHC) using dry process. The moisture-adsorption and retention ability was investigated. The results showed that the moisture-adsorption and retention ability of cationic starch increased with DS of cationic groups. Under the condition of relative humidity (RH) 81%, when the DS of cationic starches were 0.36 and 0.70, their moisture-adsorption abilities were equal to them of hyaluronic acid (HA) and glycerin respectively. At RH 43% and 15%, the moisture-retention ability of SMMAHC with DS of 0.70 was equal to hyaluronic acid, surpurior than glycerin. Moisture absorption kinetics of SMMAHC was preliminary studied, the pseudo-second order model of adsorption kinetic equation can characterize the adsorption process verywell and the relation coefficients are all higher than 0.999.

Abstract:Bentonite、Sepiolite、Fly Ash and Diatomite were modification by DATB, and the structure of the sorbent were investigated by TG、XRD and IR. The effects of time、pH、amount of adsorbent and other factors were studied ,based on the adsorbent effect of treatment of oil wastewater. It is indicated that under the best experimental condition, the removal rate of COD, oil, ammonia nitrogen and volatile phenol may separately reach 86.79%, 92.33%, 78.64%, 87.05%; The pollutant adsorption conforms to Freundlich or the Langmuir adsorption isotherm.

Abstract:Abstract: In this paper, in order to terminated polyoxyethylene chain of non-ionic poly(amideamine) dendrimers thermal stability, and retention in the paper and the catalyst carrier applications. The results showed that: the dendrimers have good thermal stability, 300 ℃ had previously been almost no significant thermal decomposition behavior, the largest thermal decomposition temperature occurred in the vicinity of 400 ℃. Retention performance test showed that M4.0G (fourth generation) Retention System retention rate 88.9%, compared with a blank pattern of retention rates increased 13.5%. Paper samples of physical mechanical properties of tear index, tear strength, bursting index, tensile strength and breaking resistance index was higher than the blank pattern were increased 8.6%, 1.5%, 35.5%, 29.6% and 4.3%. TEM tests show that the PEO-terminated groups poly(amidoamine) dendrimers samples of palladium metal nanoparticles embedded monodispersed better particle size distribution range of 0.75~2.4nm .

Abstract:Based on the mechanism of free radical polymerization and graft copolymerization, nanocellulose whiskers(NCW) was polymerized with acrylic monomer using potassium persulfate as the initiator. The graft copolymer was characterized using several analytical techniques such as FTIR, TEM, TGA, and the conductometric titration method, which was used to calculate the grafting yield. The effects of reaction conditions on the graft yield and graft efficiency were investigated. It is showed that the graft copolymer with higher grafting yield and graft efficiency was obtained when the contents of initiator is 4mmol/L, the molar ratio of NCW and AA is 1:1.5, the initiate time and reaction time were 10min and 6h, respectively.The acrylic monomers graft on NCW can improve the dispersion stability and thermal stability of NCW.