23 results match your criteria: "Wuhan University of Science and Engineering[Affiliation]"

Ultradrawing novel ultra-high molecular weight polyethylene fibers filled with bacterial cellulose nanofibers.

Carbohydr Polym

January 2014

Hubei Collaborative Innovation Center for Advanced Organic Chemical Materials, Ministry of Education, Key Laboratory for the Green Preparation and Application of Functional Materials, Faculty of Materials Science and Engineering, Hubei University, Wuhan, China; Graduate School of Material Science and Engineering, National Taiwan University of Science and Technology, Taipei, Taiwan; Key Laboratory of Green Processing and Functional Textiles of New Textile Materials (Wuhan University of Science and Engineering), Ministry of Education, Wuhan, China; School of Printing and Packaging, Wuhan University, Wuhan, China. Electronic address:

Novel ultrahigh molecular weight polyethylene (UHMWPE)/bacterial cellulose (BC) (F100BCy) and UHMWPE/modified bacterial cellulose (MBC) (F100MBCx-y) as-prepared fibers were prepared and ultra-drawn. The achievable draw ratio (Dra) values of each F100MBCx-y as-prepared fiber series specimens approached a maximum value as their MBC contents reached the optimal value at 0.0625phr.

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KGM and PMAA based pH-sensitive interpenetrating polymer network hydrogel for controlled drug release.

Carbohydr Polym

September 2013

Key Laboratory of Green Processing and Function Texiles of New Materials of Ministry of Education, Wuhan University of Science and Engineering, Wuhan 430073, China.

Sequential interpenetrating polymer networks (IPN) hydrogels based on konjac glucomannan (KGM) and poly(methacrylic acid) (PMAA) were prepared by immersion of a solution of methacrylic acid (MAA) monomer with cross-linker N,N'-methylenebisacrylamide (MBAAm) and initiating into a pre-fabricated dried KGM gel. Polymerization and cross-linking of MAA inside the KGM network resulted in a novel biodegradable pH-sensitive IPN hydrogel. The studies on the swelling behavior of IPN hydrogels reveal their sensitive response to environment pH value.

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The impacts of different nutrient additions (N + P, N + P + C, 4N + P, 4N + P + C, N + 2P) on the growth of algae and bacteria were studied in a microcosm experiment. Since alkaline phosphatase activity (APA) provides an indication of phosphorus deficiency, the higher value for algal APA in the treatments with excess nitrogen and for bacterial APA in the treatments with excess carbon suggested that, algal and bacterial phosphorus-limited status were induced by abundant nitrogen and carbon input, respectively. Bacterial phosphorus-limited status was weakened due to higher bacterial competition for phosphorus, compared to algae.

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Thermo-sensitive semi-IPN hydrogels were prepared via in situ copolymerization of N-isopropylacrylamide (NIPAAm) with poly(ethylene glycol)-co-poly(epsilon-caprolactone) (PEG-co-PCL) macromer in the presence of sodium alginate by UV irradiation technology. The effects of the sodium alginate content, temperature, and salt on the swelling behavior of the as-obtained hydrogels were studied. The results showed that the swelling ratio of the hydrogels increased with the increasing sodium alginate content at the same temperature, and decreased with the increase in temperature.

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Supramolecular hydrogels formed from biodegradable ternary COS-g-PCL-b-MPEG copolymer with alpha-cyclodextrin and their drug release.

Carbohydr Res

November 2009

Key Laboratory of Green Processing and Functional Textiles of New Textile Materials of Ministry of Education, Wuhan University of Science and Engineering, Wuhan 430073, PR China.

On the basis of the synthesis of novel biodegradable amphiphilic MPEG-b-PCL-grafted chitooligosaccharide (COS-g-PCL-b-MPEG) copolymers, supramolecular hydrogels were fabricated rapidly via their inclusion complexation with alpha-cyclodextrin (alpha-CD) in aqueous solutions. The graft copolymers were characterized by (1)H NMR spectroscopy, gel permeation chromatography (GPC), and fluorescence measurement, and the supramolecular structure of the resultant hydrogels was confirmed by X-ray diffraction measurements. Rheological studies of as-obtained hydrogels indicate that the physical properties could be modulated by controlling the concentration and the graft content of the graft copolymers as well as the molar feed ratio of the graft to alpha-CD.

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Identification and phylogenetic analysis of new sulfate-reducing bacteria isolated from oilfield samples.

Z Naturforsch C J Biosci

July 2009

Engineering Research Center of Textile Printing and Dyeing, Ministry of Education, Wuhan University of Science and Engineering, Wuhan 430073, China.

Microbiologically influenced corrosion (MIC) caused by sulfate-reducing bacteria (SRB) has been investigated in an oilfield injection water system. Strain CW-01 was isolated from an oilfield and strain CW-04 was isolated from biofilm dirt of pipeline walls. The strains were facultative anaerobes, non-motile, Gram-positive, pole flagellum, and spore-forming curved rods.

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Shrinking factors of hyperbranched polysaccharide from fungus.

Carbohydr Res

July 2009

Key Laboratory of Green Processing and Functional Textiles of New Textile Materials, Ministry of Education, Wuhan University of Science and Engineering, Wuhan 430073, China.

The branched structure properties of hyperbranched polysaccharides (TM3a and TM3b), extracted from sclerotia of Pleurotus tuber-regium, were studied by using laser light scattering and viscometry. The configurational shrinking factor (g) and viscometric shrinking factor (g') of TM3a and TM3b were discussed, where curdlan and pullulan were taken as the linear references for derivation of g and g'. The dependences of g factor, g' factor, and Flory factor (Phi(branched)) on weight average molecular weight (M(w)) were established to be g=1.

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Theoretical study on the trans-cis isomerization and initial decomposition of energetic azofurazan and azoxyfurazan.

J Mol Graph Model

September 2009

Key Laboratory of Green Processing and Functional Textiles of New Textile Materials, Wuhan University of Science and Engineering, Ministry of Education, Luxiang, Wuhan 430073, PR China.

In this work, we carried out the hybrid density functional theory (DFT) calculations in order to understand the thermal trans-cis isomerization and initial thermal decomposition of 3,3'-diamino-4,4'-azofurazan (DAAzF), 3,3'-diamino-4,4'-azoxyfurazan (DAAF), 3,3'-dinitro-4,4'-azofurazan (DAAF) and 3,3'-dinitro-4,4'-azoxyfurazan (DAAzF). The relative energy between the trans- and cis-isomer was also calculated at the B3LYP/6-311++G(d,p)//B3LYP/6-31G(d) level of theory. We found that a negative correlation existed between the relative energy and the sensitivity for these energetic azofurazan and azoxyfurazan compounds, where the higher relative energy means the lower the sensitivity.

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We report a combined experimental and computational study of the large self-assembly complex (CoL)(2) [L= bis(2,4,8,10-tetramethyl-9-methoxycarbonylethyldipyrrin-3-yl)methane] containing 172 atoms. An extensive density functional theory (DFT) and time-dependent DFT study of this complex in gas phase and in CH(2)Cl(2) solution was performed, investigating the effect of substitutions of methyl and methyl propionate on the electronic structure and optical properties of this complex. The calculated IR and Raman spectra are in excellent agreement with the experiment, thus allowing a detailed assignment of the vibrational absorption bands.

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Mechanical properties of small-diameter polyurethane vascular grafts reinforced by weft-knitted tubular fabric.

J Biomed Mater Res A

January 2010

Hubei New Textile and Its Application Key Laboratory, Wuhan University of Science and Engineering, Wuhan 430073, People's Republic of China.

Polyester filament yarns of different Deniers were knitted into tubular fabrics with different densities and thicknesses on a specially designed weft-knitting machine. The developed tubular fabric was used to reinforce polyurethane vascular graft and thus a kind of composite vascular graft was fabricated with a small inner diameter of 4 mm. Tensile properties of the reinforced composite vascular grafts were compared with the control tubular fabric and the pure PU vascular grafts.

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This paper presents a new way of recycling aluminum and iron in boiler slag derived from coal combustion plants, which integrates efficient extraction and reuse of the leached pellets together. The boiler slag was pelletized together with washed coal and lime prior to sintering and then was sintered at 800-1200 degrees C for different periods to produce sintered pellets for the leaching test. An elemental analysis of aqueous solutions leached by sulfuric acid was determined by EDTA-Na(2)-ZnCl(2) titration method.

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In this work, some critical structures (e.g. stable structure, transition state, local minimum and conical intersection) of azobenzene photoisomerization were optimized by means of ab initio CASSCF calculation.

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Hydroxonium 1-ammonio-ethane-1,1-diyl-diphospho-nate.

Acta Crystallogr Sect E Struct Rep Online

March 2009

Department of Chemical Engineering, Wuhan University of Science and Engineering, Wuhan 430073, People's Republic of China.

The title complex, H(3)O(+)·NH(3)C(CH(3))(PO(3)H)(2) (-), contains a hydroxonium ion and an NH(3)C(CH(3))(PO(3)H)(2) (-) anion. The three H atoms of H(3)O(+) form a pseudo-tetra-hedron by being distributed over four positions with occupation factors of 0.75.

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Microwave-assisted solubilization and solution properties of hyperbranched polysaccharide.

Carbohydr Res

December 2008

Key Laboratory of Green Processing and Functional Textiles of New Textile Materials, Ministry of Education, Wuhan University of Science and Engineering, Wuhan 430073, China.

A water-insoluble hyperbranched beta-d-glucan (TM3a), extracted from sclerotia of Pleurotus tuber-regium, was treated by microwave exposure to improve its solubility in water. This method led to complete dissolution of the TM3a polysaccharide in 0.02 wt% aqueous NaN(3).

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Six models for determining air temperatures for thermal comfort of people using sleeping bags were reviewed. These models were based on distinctive metabolic rates and mean skin temperatures. All model predictions of air temperatures are low when the insulation values of the sleeping bag are high.

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In this work, the effects of H(+) and NH(4)(+) on the initial decomposition of HMX were investigated on the basis of the B3P86/6-31G** and B3LYP/6-31G* calculations. Three initial decomposition pathways including the N-NO(2) bond fission, HONO elimination and C-N bond dissociation were considered for the complexes formed by HMX with H(+) (PHMX1 and PHMX2) or with NH(4)(+) (AHMX). We found that H(+) and NH(4)(+) did not evidently induce the HMX to trigger the N-NO(2) heterolysis because the energy barrier of N-NO(2) heterolysis was found to be higher than the bond dissociation energy of N-NO(2) homolytic cleavage.

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Modeling the relative fluorescence intensity ratio of Eu(III) complex in different solvents based on QSPR method.

J Fluoresc

March 2009

Key Laboratory of Green Processing and Functional Textiles of New Textile Materials, Ministry of Education, Wuhan University of Science and Engineering, Wuhan, 430073, China.

The quantitative structure-property relationship approach was performed to study the relative fluorescence intensity ratio (R) of Eu(DBM)(3)Phen (DBM-dibenzoylmethane, Phen-1,10-phenanthroline) in 34 different solvents. The multilinear regression analysis and artificial neural networks were employed to develop linear and nonlinear models, respectively. The proposed linear model contains six descriptors, with the squared correlation coefficient r(2) = 0.

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In order to investigate the feasibility of sequential removal NO and SO2 using non-thermal plasma and adsorbent simultaneously, the removal of NO and SO2 from dry gas stream (NO/SO2/N2/O2) with very little O2 using non-thermal plasma was investigated using a coaxial dielectric barrier discharge. Comparative experiments were carried out in the dry gas stream with and without Ar respectively at O2 concentration of 0.1%.

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Bis[(E)-4-chloro-2-(2-furylmethyl-imino-meth-yl)phenolato]iron(II).

Acta Crystallogr Sect E Struct Rep Online

May 2008

Engineering Research Center for Clean Production of Textile Printing, Ministry of Education, Wuhan University of Science and Engineering, Wuhan 430073, People's Republic of China.

The Fe atom of the title compound, [Fe(C(12)H(9)ClNO(2))(2)], lies on a crystallographic twofold rotation axis. The Fe(II) atom is four-coordinated in a tetra-hedral geometry by the O and N atoms of the two Schiff base ligands. The O atom of the furan substituent in the ligand unit is not involved in coordination to the Fe atom.

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Bis[(E)-4-chloro-2-(cyclo-hexyl-imino-meth-yl)phenolato]nickel(II).

Acta Crystallogr Sect E Struct Rep Online

May 2008

Engineering Research Center for the Clean Production of Textile Printing, Ministry of Education, Wuhan University of Science and Engineering, Wuhan 430073, People's Republic of China.

In the title mononuclear nickel(II) complex, [Ni(C(13)H(15)ClNO)(2)], the Ni(II) atom is four-coordinated in a tetra-hedral geometry by the N and O atoms of the two Schiff base ligands.

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Bis{(E)-2,4-diiodo-6-[(2-morpholinoeth-yl)imino-meth-yl]phenolato}nickel(II).

Acta Crystallogr Sect E Struct Rep Online

May 2008

Engineering Research Center for the Clean Production of Textile Printing, Ministry of Education, Wuhan University of Science and Engineering, Wuhan 430073, People's Republic of China.

In the title mononuclear nickel(II) complex, [Ni(C(13)H(15)I(2)N(2)O(2))(2)], the Ni(II) atom is four-coordinated in a tetra-hedral geometry by the imine N and phenolate O atoms of the two Schiff base ligands. The O and N atoms of the morpholine substituent in the ligand are not involved in coordination to the Ni atom.

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Current thermal comfort indices do not take into account the effects of wind and body movement on the thermal resistance and vapor resistance of clothing. This may cause public health problem, e.g.

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Bis(2-aminopyridine-kappaN(1))(benzoato-kappaO)silver(I).

Acta Crystallogr C

June 2003

Department of Environmental and Chemical Engineering, Wuhan University of Science and Engineering, Wuhan 430073, People's Republic of China.

In the title compound, [Ag(C(7)H(5)O(2))(C(5)H(6)N(2))(2)], the Ag(I) atom is tricoordinated by two independent pyridine N atoms and one benzoate O atom in a nearly planar geometry. An intramolecular N-H.O hydrogen bond forms an S(8) graph ring.

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