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Search Results: 1 - 10 of 150986 matches for " WANG Jun QUAN "
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The Application of New Chiral Ferrocene Ligands in Asymmetric Transfer Hydrogenation of Ketones  [PDF]
Yuan-Zhao Mo, Quan-Jun Wang, Hui-Fang Nie, Qiao-Feng Wang
International Journal of Organic Chemistry (IJOC) , 2018, DOI: 10.4236/ijoc.2018.81004
Abstract: Four easily available ferrocenyl chiral ligands have been screened firstly for ruthenium (II)-catalyzed asymmetric transfer hydrogenation of acetophenone with HCOOH/Et3N azeotrope as the hydrogen source. A moderate chemical yield of 1-phenylethanol with 83% ee was obtained when (RC, SFc)-1-(Diphe-nylphosphino)-2-[1-N-(3-methylpyridin-2-ylmethyl) ethyl] ferrocene (L1) was used. Particularly, both ruthenium and iridium could coordinate with L1 to accomplish the asymmetric reduction of series of aromatic ketones separately. The desired products were achieved with up to 86% ee.<
A Case of Chronic Conjunctivitis following Rituximab Therapy
Marnelli A. Bautista,Walter D. Y. Quan,Jun Wang
Advances in Hematology , 2009, DOI: 10.1155/2009/272495
Abstract: The activity of the anti-CD20 monoclonal antibody, rituximab in B-cell non-Hodgkin's lymphoma, with relatively minimal toxicity has been well established. Adverse effects such as low-grade fever, urticaria, bronchospasm, sporadic tachycardia, and hypotension have been described. However, only a single case of rituximab-related, transient conjunctivitis has been documented in literature. We report an occurrence of chronic, bilateral conjunctivitis in an 88-year-old female diagnosed with stage IV, non-Hodgkin's lymphoma (NHL), who was maintained on rituximab for 12 months. In contrast to the previously described case, our patient developed severe conjunctival inflammation approximately three to four weeks following rituximab induction. Resolution of conjunctivitis occurred within two months after cessation of rituximab treatment.
Anthocyanins Profile of Grape Berries of Vitis amurensis, Its Hybrids and Their Wines
Quan Zhao,Chang-Qing Duan,Jun Wang
International Journal of Molecular Sciences , 2010, DOI: 10.3390/ijms11052212
Abstract: Anthocyanins are responsible for the color of grapes and wine, an important attribute of their quality. Many authors have used anthocyanins profile to classify the grape cultivars and wine authenticity. The anthocyanin profiles of grape berries of Vitis amurensis, its hybrids and their wines were analyzed by HPLC-ESI-MS/MS. The results identified 17 anthocyanins in these grape cultivars, including 11 anthocyanin monoglucosides (five pyranoanthocyanin monoglucosides and one acylated pyranoanthocyanin monoglucoside) and six anthocyanin diglucosides. Likewise, 15 kinds of anthocyanins were detected in wines, including six diglucosides and nine monoglucosides of anthocyanidins, in which four pyranoanthocyanin monoglucosides (Petunidin-3- O-glucoside-4-acetaldehyde, Malvidin-3- O-glucoside-4-pyruvic acid, Malvidin-3- O-glucoside-acetaldehyde and Peonidin-3- O-glucoside-4-pyruvic acid) were detected. In addition, a total of 14 kinds of anthocyanins including six diglucosides and eight monoglucosides of anthocyanidins were identified in skins, in which two pyranoanthocyanin monoglucosides (Peonidin-3- O-glucoside-4-pyruvic acid, Malvidin-3- O-glucoside-4-vinylphenol) and one acylated pyranoanthocyanin monoglucoside (Malvidin-3- O-(6- O-acetyl)-glucoside-4-vinylphenol) were detected. The anthocyanins profile of grape skin of V. amurensis and its hybrids consist of the anthocyanin monoglucosides, diglucosides and pyranoanthocyanins. The wines produced resulted in a slightly different anthocyanin distribution. Pelargonidin-3,5-diglucosides was first found in the skins and wines, however, no acetyl was detected in wines. The principal component analysis results suggest that the anthocyanin profiles were helpful to classify these cultivars of V. amurensis.
Effects of processing parameters on microstructure and ultimate tensile strength of thixoformed AM60B magnesium alloy
Chen, Ti Jun;Wang, Rui Quan;Ma, Ying;Hao, Yuan;
Materials Research , 2012, DOI: 10.1590/S1516-14392012005000079
Abstract: the effects of processing parameters, such as the punch speed, reheating duration and reheating temperature, on microstructure and ultimate tensile strength (uts) of thixoformed am60b magnesium alloy have been investigated. the results indicate that low punch speed, short reheating duration or low reheating temperature often produces the defect of cold shuts or shrinkage porosities. on the contrary, gas pores can easily form. in addition, the reheating duration or temperature also has obvious effects on the primary particle size, fraction and morphology. the three parameters can significantly affect the uts due to their effects on the formation of pores (cold shuts, shrinkage porosities and gas pores). but they can not alter the fracture path during tensile testing and the path is always along the secondarily solidified structures between the primary particles. the effect of pore amount on the uts is lager than that of the primary particle size, fraction or morphology. in view of their effects on the microstructure compactness and the resultant uts, the optimized parameters are reheating for 130 minutes at 610 °c and punch speed of 3 m/s.
Semisolid microstructure evolution of AZ91D magnesium alloy refined by Al-Ti-B
Chen, Ti Jun;Wang, Rui Quan;Ma, Ying;Hao, Yuan;
Materials Research , 2011, DOI: 10.1590/S1516-14392011005000085
Abstract: the microstructural evolution and corresponding phase transformations have been investigated during partial remelting of az91d magnesium alloy refined by al-ti-b master alloy. the effect of heating temperature on semisolid microstructure has also been discussed. the results indicate that the microstructural evolution process includes four stages, the initial rapid coarsening, structure separation, spheroidization accompanied by coarsening and the final coarsening. two or more equiaxed dendrites in the as-cast microstructure evolve into one spheroidal primary particle in the semisolid microstructure through the former three stages. the initial rapid coarsening results from the reaction of β→α, the structure separation is due to the α + β→l and α→l, the spheroidization is attributed to the α→l and the final coarsening is ascribed to the two reverse reactions of α→l and l→α. rising the heating temperature during partial remelting is beneficial for obtaining small and spheroidal primary particles.
Genetic diversity of reared N.miichthioides population
Yongquan Su,Shaoxiong Ding,Jun Wang,Chenggan Quan
Chinese Science Bulletin , 1999, DOI: 10.1007/BF02977882
Abstract: The genetic diversity of 30 rearedNibea miichthioides individuals was analyzed by random amplified polymorphic DNA (RAPD) with 20 random primers. The result showed that the genetic diversity of reared individuals was relatively low with 15.31% polymorphism and 0.031 9 of the average difference (AD). The result also indicated that RAPD is a useful way in genetic diversity analysis of fish population.
Genetic diversity of reared N. miichthioides population

Su Yongquan,Ding Shaoxiong,Wang Jun,Quan Chenggan,

科学通报(英文版) , 1999,
Abstract: The genetic diversity of 30 rearedNibea miichthioides individuals was analyzed by random amplified polymorphic DNA (RAPD) with 20 random primers. The result showed that the genetic diversity of reared individuals was relatively low with 15.31% polymorphism and 0.031 9 of the average difference (AD). The result also indicated that RAPD is a useful way in genetic diversity analysis of fish population.
Diffraction properties of transmission binary blazed grating
Hui-Jun Zhou,Qu-Quan Wang
Optica Applicata , 2006,
Abstract: The properties of binary blazed grating were theoretically analyzed with finite-difference time-domain (FDTD) method. The diffraction efficiencies and diffraction angles of –1, 0, and +1 order for the grating varying with wavelength, grating structure, and the etch depth were studied when the incident angle was 30°. The numerical simulations revealed that the binary blazed grating presented high stability of diffraction efficiencies with wavelength shift.
Dichloridotriphenylantimony(V)–bis(pyrrolidin-1-ylthiocarbonyl) disulfide (1/1)
Li Quan,Handong Yin,Jun Zhai,Daqi Wang
Acta Crystallographica Section E , 2008, DOI: 10.1107/s1600536807063830
Abstract: The asymmetric unit of the title compound, [Sb(C6H5)3Cl2]·C10H16N2S4, comprises a bis(pyrrolidinylthiocarbamoyl) molecule and a dichlorotriphenylantimony(V) complex. In the Sb complex, the central atom is coordinated by three C atoms of the three phenyl ligands and two Cl atoms in a slightly distorted trigonal-bipyramidal geometry. The thiocarbamoyl units, connected via the disulfide bond, are approximately perpendicular to each other. The molecules are connected by weak C—H...S and C—H...Cl hydrogen-bonding interactions into two one-dimensional supramolecular chains.
Induction of interleukin-10 is dependent on p38 mitogen-activated protein kinase pathway in macrophages infected with porcine reproductive and respiratory syndrome virus
Hou Jun,Wang Lianghai,Quan Rong,Fu Yi
Virology Journal , 2012, DOI: 10.1186/1743-422x-9-165
Abstract: Background Porcine reproductive and respiratory syndrome virus (PRRSV) causes reproductive failure and respiratory illness in pigs and usually establishes a persistent infection. Previous studies suggested that interleukin-10 (IL-10) could play a critical role in PRRSV-induced immunosuppression. However, the ability of PRRSV to induce IL-10 in infected cells is controversial. In this study, we further investigated this issue using PRRSV strain CH-1a, which is the first North American genotype strain isolated in China. Results PRRSV strain CH-1a could significantly up-regulate IL-10 production both at mRNA and protein levels in porcine alveolar macrophages (PAMs), bone marrow-derived macrophages (BMDMs), and monocyte-derived macrophages (MDMs). However, up-regulation of IL-10 by PRRSV was retarded by specific inhibitors of p38 mitogen-activated protein kinase (MAPK) (SB203580) and NF-κB (BAY11-7082). Additionally, p38 MAPK and NF-κB pathways but not ERK1/2 MAPK were actually activated in PRRSV-infected BMDMs as demonstrated by western blot analysis, suggesting that p38 MAPK and NF-κB pathways are involved in the induction of IL-10 by PRRSV infection. Transfection of PAMs and PAM cell line 3D4/21 (CRL-2843) with viral structural genes showed that glycoprotein5 (GP5) could significantly up-regulate IL-10 production, which was dependent on p38 MAPK and signal transducer and activator of transcription-3 (STAT3) activation. We also demonstrated that a full-length glycoprotein was essential for GP5 to induce IL-10 production. Conclusions PRRSV strain CH-1a could significantly up-regulate IL-10 production through p38 MAPK activation.
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