Search results for: Qin Qu

Items from 1 to 20 out of 23 results

article

One‐Pot Construction of Fluorinated Chiral Alcohols via Sequential Substitution/Asymmetric Transfer Hydrogenation of α‐Bromoarylketones and Fluoroalcohols

Rongrong Zhao, Qiao Wei, Yuxin Huang, Qin Qu, more

Advanced Synthesis & Catalysis > 365 > 14 > 2410 - 2415

A one‐pot synthesis of fluorinated chiral alcohols from α‐bromoarylketones and fluoroalcohols is described. The fluorinated ketone intermediates were formed from α‐bromoarylketones with fluoroalcohols as nucleophiles and solvents, which were reduced subsequentially by adding a chiral Ru catalyst and a mixture of formic acid and triethyl amines (FA: TEA=1.1:1) as hydrogen donor to give 27 examples...

article

A note on the perturbed monomial mapping

Cheng-qin Qu, Zhi-wei Zhu, Zuo-ling Zhou

Applied Mathematics-A Journal of Chinese Universities > 2019 > 34 > 1 > 76-81

In this paper, we present a necessary and sufficient condition that the perturbed monomial mapping is ergodic on a sphere $$S_{p^{-1}}(1)$$ S p − 1 ( 1 ) , which is in a combination with Anashin’s earlier results about the perturbed monomial ergodic mappings on a sphere $$S_{p^{-r}}(1)$$ S p − r ( 1 ) ; r > 1, com-pletely solve a problem posed by A. Khrennikov about the...

article

Structure and optical property of functionalized reduced graphene oxides as electron acceptors in polymer solar cells

La-qin Qu, Wei-jia Yang, Ya-min Hao, Yong-zhen Yang, more

Carbon > 2015 > 93 > C > 1082

Graphene oxide (GO) prepared by the Hummers method was hydrothermally reduced for 5 and 10h to obtain 5-RGO and 10-RGO, respectively. The GO and RGOs reacted with phenyl isocyanate to obtain three solution-processable functionalized graphenes (SPFGO, 5-SPFRGO and 10-SPFRGO), which were used as electron acceptors to prepare composite films with poly 3-hexylthiophene (P3HT) as an electron donor in polymer...

article

Molecularly imprinted polymers derived from lignin-based Pickering emulsions and their selectively adsorption of lambda-cyhalothrin

Mengying Gan, Jianming Pan, Yunlei Zhang, Xiaohui Dai, more

Chemical Engineering Journal > 2014 > 257 > Complete > 317-327

Lignin particles were used as stabilizers to establish a stable Pickering oil–water emulsion, and then the molecularly imprinted polymers (MIPs) were fabricated by radical polymerization in the presence of functional and cross-linked monomers in the oil phase. As-prepared MIPs were observed with a diameter from 10μm to 65μm when oil/water ratio increased from 0.11 to 0.68, and exhibited thermal stability...

article

Synthesis of macroporous polymer foams via pickering high internal phase emulsions for highly efficient 2,4,5‐trichlorophenol removal

Qin Qu, Jianming Pan, Yijie Yin, Runrun Wu, more

Journal of Applied Polymer Science > 132 > 6 > n/a - n/a

Macroporous polymers foams (MPFs) were prepared by W/O Pickering high internal phase emulsions (HIPEs) stabilized by oleic acid (OA) modified silica nanoparticles (SPs), and then as‐prepared MPFs were applied to highly efficient adsorption of 2,4,5‐trichlorophenol (TCP). The characterization demonstrated that MPFs possessed macropore (50–150 μm) and interconnected pores (0.5–2 μm), and also had slightly...

article

Molecularly imprinted polymer foams with well-defined open-cell structure derived from Pickering HIPEs and their enhanced recognition of λ-cyhalothrin

Jianming Pan, Qin Qu, Jun Cao, Dong Yan, more

Chemical Engineering Journal > 2014 > 253 > Complete > 138-147

The water-in-oil Pickering high internal phase emulsions (HIPEs) were firstly stabilized by hydrophobic silica particles with adding small amounts of nonionic surfactant Hypermer 2296. Then molecularly imprinted polymer foams (MIPFs) derived from Pickering HIPEs were evaluated as adsorbents for the selective adsorption of λ-cyhalothrin. The results of characterization indicated that MIPFs possessed...

article

Self-assembly of ultra-small gold nanoparticles on an indium tin oxide electrode for the enzyme-free detection of hydrogen peroxide

Wei Xiong, Qin Qu, Shantang Liu

Microchimica Acta > 2014 > 181 > 9-10 > 983-989

A novel enzyme-free electrochemical sensor for H₂O₂ was fabricated by modifying an indium tin oxide (ITO) support with (3-aminopropyl) trimethoxysilane to yield an interface for the assembly of colloidal gold. Gold nanoparticles (AuNPs) were then immobilized on the substrate via self-assembly. Atomic force microscopy showed the presence of a monolayer of well-dispersed AuNPs with an average size of...

article

Biochemical evidence of key residues for the activation and autoprocessing of tomato type II metacaspase

Shuai Wen, Qiu-Min Ma, Ya-Li Zhang, Ji-Ping Yang, more

FEBS Letters > 2013 > 587 > 16 > 2517-2522

To investigate the autolysis pattern and activation of metacaspase in higher plants, the biochemical characteristics of purified recombinant type II metacaspase (LeMCA1) from tomato were explored. Western blotting analysis indicated that four cleaved bands were formed; two N-terminal fragments and two C-terminal fragments. N-terminal sequencing confirmed that LeMCA1 cleaves at Lys223 and Arg332. Site...

article

Corrigendum to “TAT-mediated oral subunit vaccine against white spot syndrome virus in crayfish” [J. Virol. Methods 181 (April (1)) (2012) 59–67]

Yi Zhang, Jian-Fang Ning, Xing-qin Qu, Xiao-Lin Meng, more

Journal of Virological Methods > 2013 > 187 > 1 > 207

article

Hausdorff measures for a class of homogeneous cantor sets

Cheng-qin Qu

Acta Mathematicae Applicatae Sinica, English Series > 2013 > 29 > 1 > 117-122

We consider the homogeneous Cantor sets which are generalization of symmetric perfect sets, and give a formula of the exact Hausdorff measures for a class of such sets.

article

TAT-mediated oral subunit vaccine against white spot syndrome virus in crayfish

Yi Zhang, Jian-Fang Ning, Xing-qin Qu, Xiao-Lin Meng, more

Journal of Virological Methods > 2012 > 181 > 1 > 59-67

White spot syndrome virus is a highly pathogenic virus that infects crayfish and other crustaceans. VP28 is one of its major envelope proteins, and plays a crucial role in viral infection. Cell-penetrating peptides are short peptides that facilitate cellular uptake of various molecular cargoes, and one well known example is TAT peptide from HIV-1 TAT protein. In this study, recombinant plasmids were...

chapter

The demand forecasting of the multi-echelon inventory in the regional logistics network

Zhong-chi Qin, Liang Sun, Ya-qin Qu, Yong Li

2011 IEEE 18th International Conference on Industrial Engineering and Engineering Management > Part 3 > 1544 - 1548

2011 IEEE 18th International Conference on Industrial Engineering and Engineering Management (IE&EM 2011)

The article studies inventory demand forecast in regional logistics network of retailers, distribution center, and suppliers. It considers the demand difference between distribution center, suppliers and retailers from the perspective of supply chain, and according to different level of demand, determines the relationship between the shortest circuit matrix and demand mapping in regional logistics...

article

Evidence for programmed cell death and activation of specific caspase-like enzymes in the tomato fruit heat stress response

Gui-Qin Qu, Xiang Liu, Ya-Li Zhang, Dan Yao, more

Planta > 2009 > 229 > 6 > 1269-1279

The tomato (Lycopersicon esculentum) fruit is the best available model to study the stress response of fleshy fruit. Programmed cell death (PCD) plays an important role in stress responses in mammals and plants. In this study, we provide evidence that PCD is triggered in the tomato fruit heat stress response by detection of the sequential diagnostic PCD events, including release of cytochrome c, activation...

article

Investigation of the antioxidant and synergistic activity of lycopene and other natural antioxidants using LAME and AMVN model systems

John Shi, Qin Qu, Yukio Kakuda, Sophia Jun Xue, more

Journal of Food Composition and Analysis > 2007 > 20 > 7 > 603-608

The antioxidant activity of lycopene and its cooperative interaction with vitamin E were studied in a homogenous solution of linoleic acid methyl ester (LAME). Antioxidant property of lycopene, β-carotene, vitamins C and E, individually or in combination, were assayed by measuring the inhibiting effect of individual or combination of antioxidants on the production of diene hydroperoxides from LAME...

article

Hausdorff measures for a class of homogeneous Moran sets

Cheng-Qin Qu, Zuo-Ling Zhou

Nonlinear Analysis > 2006 > 65 > 2 > 442-447

This paper provides an explicit formula for the Hausdorff measures of a class of regular homogeneous Moran sets. In particular, this provides, for the first time, an example of an explicit formula for the Hausdorff measure of a fractal set whose Hausdorff dimension is greater than 1.

article

The upper densities of symmetric perfect sets

Cheng-Qin Qu, Zuo-Ling Zhou, Bao-Guo Jia

Journal of Mathematical Analysis and Applications > 2004 > 292 > 1 > 23-32

In this paper, we give the exact upper densities of Hausdorff measures of a class of symmetric perfect sets.

article

Stoichiometry and Affinity of Nucleotide Binding to P-Glycoprotein during the Catalytic Cycle ^†

Qin Qu, Paula L. Russell, Frances J. Sharom

Biochemistry > 2003 > 42 > 4 > 1170 - 1177

article

Transition State P-glycoprotein Binds Drugs and Modulators with Unchanged Affinity, Suggesting a Concerted Transport Mechanism ^†

Qin Qu, Joseph W. K. Chu, Frances J. Sharom

Biochemistry > 2003 > 42 > 5 > 1345 - 1353

article

Proximity of Bound Hoechst 33342 to the ATPase Catalytic Sites Places the Drug Binding Site of P-glycoprotein within the Cytoplasmic Membrane Leaflet ^†

Qin Qu, Frances J. Sharom

Biochemistry > 2002 > 41 > 14 > 4744 - 4752

article

Exploring the structure and function of the P-glycoprotein multidrug transporter using fluorescence spectroscopic tools

Frances J. Sharom, Ronghua Liu, Qin Qu, Yolanda Romsicki

Seminars in Cell and Developmental Biology > 2001 > 12 > 3 > 257-265

P-glycoprotein is an ABC protein that functions as an efflux pump for multiple drugs, natural products and peptides. It is proposed to operate as a hydrophobic vacuum cleaner, expelling non-polar compounds from the membrane bilayer to the exterior, driven by the energy of ATP hydrolysis. The nucleotide-binding domains of P-glycoprotein appear to operate by an alternating sites mechanism to power drug...

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HAUSDORFF MEASURE (5)
CONVEXITY (3)
HOMOGENEOUS CANTOR SET (3)
LYCOPERSICON (FRUIT) (1)
1991MR SUBJECT CLASSIFICATION 28A80 (1)
28A80 (1)
ACTIVATION (1)
ADSORPTION (1)
ANTIOXIDANT (1)
ASYMMETRIC TRANSFER HYDROGENATION (1)
AUTOPROCESSING (1)
BASIC CUBE (1)
CAMBARUS CLARKII (1)
CASPASE-LIKE ACTIVITY (1)
CELL-PENETRATING PEPTIDES (1)
DEMAND FORECASTING (1)
DETECTING HYDROGEN PEROXIDE (1)
ENHANCED RECOGNITION (1)
ENZYME-FREE (1)
EQUATIONS (1)
ERGODIC (1)
FLUORINATED CHIRAL ALCOHOLS (1)
FOAMS (1)
FORECASTING (1)
HEAT STRESS (1)
HOMOGENEOUS MORAN SET (1)
INVENTORY DEMAND (1)
LAMBDA-CYHALOTHRIN (1)
LIGNIN (1)
LOGISTICS (1)
LYCOPENE (1)
MATHEMATICAL MODEL (1)
METACASPASE (1)
MODELING (1)
MOLECULARLY IMPRINTED POLYMER FOAMS (1)
MOLECULARLY IMPRINTED POLYMERS (1)
MULTI-ECHELON INVENTORY (1)
MULTIDRUG RESISTANCE / ABC SUPERFAMILY / SUBSTRATE BINDING / FLUORESCENCE QUENCHING / RESONANCE ENERGY TRANSFER (1)
ONE-POT (1)
OPEN-CELL STRUCTURE (1)
ORAL ADMINISTRATION (1)
P-ADIC INTEGERS (1)
PERTURBED MONOMIAL MAPPING (1)
PICKERING EMULSION POLYMERIZATION (1)
PICKERING HIPES (1)
POROUS MATERIALS (1)
PREDICTIVE MODELS (1)
PROGRAMMED CELL DEATH (1)
RECOMBINANT VP28 (1)
REGIONAL LOGISTICS NETWORK (1)
SELECTIVELY ADSORPTION (1)
SELF-ASSEMBLY (1)
SITE-DIRECTED MUTAGENESIS (1)
SUBSTITUTION (1)
SYMMETRIC PERFECT SET (1)
SYNERGISTIC EFFECT (1)
TAT-VP28 PROTEIN (1)
TOMATO (1)
ULTRA-SMALL GOLD NANOPARTICLES (1)
UPPER DENSITY (1)
VITAMIN E (1)
WHITE SPOT SYNDROME VIRUS (1)
Λ-CYHALOTHRIN (1)
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Biochemistry (4)
Acta Mathematica Sinica, English Series (2)
Chemical Engineering Journal (2)
Journal of Virological Methods (2)
Acta Mathematicae Applicatae Sinica, English Series (1)
Advanced Synthesis & Catalysis (1)
Applied Mathematics-A Journal of Chinese Universities (1)
Carbon (1)
FEBS Letters (1)
Journal of Applied Polymer Science (1)
Journal of Food Composition and Analysis (1)
Journal of Mathematical Analysis and Applications (1)
Microchimica Acta (1)
Nonlinear Analysis (1)
Planta (1)
Seminars in Cell and Developmental Biology (1)
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INFONA - science communication portal

Search results for: Qin Qu

One‐Pot Construction of Fluorinated Chiral Alcohols via Sequential Substitution/Asymmetric Transfer Hydrogenation of α‐Bromoarylketones and Fluoroalcohols

A note on the perturbed monomial mapping

Structure and optical property of functionalized reduced graphene oxides as electron acceptors in polymer solar cells

Molecularly imprinted polymers derived from lignin-based Pickering emulsions and their selectively adsorption of lambda-cyhalothrin

Synthesis of macroporous polymer foams via pickering high internal phase emulsions for highly efficient 2,4,5‐trichlorophenol removal

Molecularly imprinted polymer foams with well-defined open-cell structure derived from Pickering HIPEs and their enhanced recognition of λ-cyhalothrin

Self-assembly of ultra-small gold nanoparticles on an indium tin oxide electrode for the enzyme-free detection of hydrogen peroxide

Biochemical evidence of key residues for the activation and autoprocessing of tomato type II metacaspase

Corrigendum to “TAT-mediated oral subunit vaccine against white spot syndrome virus in crayfish” [J. Virol. Methods 181 (April (1)) (2012) 59–67]

Hausdorff measures for a class of homogeneous cantor sets

TAT-mediated oral subunit vaccine against white spot syndrome virus in crayfish

The demand forecasting of the multi-echelon inventory in the regional logistics network

Evidence for programmed cell death and activation of specific caspase-like enzymes in the tomato fruit heat stress response

Investigation of the antioxidant and synergistic activity of lycopene and other natural antioxidants using LAME and AMVN model systems

Hausdorff measures for a class of homogeneous Moran sets

The upper densities of symmetric perfect sets

Stoichiometry and Affinity of Nucleotide Binding to P-Glycoprotein during the Catalytic Cycle ^†

Transition State P-glycoprotein Binds Drugs and Modulators with Unchanged Affinity, Suggesting a Concerted Transport Mechanism ^†

Proximity of Bound Hoechst 33342 to the ATPase Catalytic Sites Places the Drug Binding Site of P-glycoprotein within the Cytoplasmic Membrane Leaflet ^†

Exploring the structure and function of the P-glycoprotein multidrug transporter using fluorescence spectroscopic tools

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