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Showing 1 to 12 of 2641 entries
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Relational diversity promotes cooperation in prisoner's dilemma games.

PloS one

Xu B, Wang J, Deng R, Li M.
PMID: 25474354
PLoS One. 2014 Dec 04;9(12):e114464. doi: 10.1371/journal.pone.0114464. eCollection 2014.

Relational diversity can be characterized by heterogeneous distributions of tie strengths in social networks and this diversity is present not only among humans, but throughout the animal world. We account for this observation by analyzing two network datasets from...

Annular focusing lens based on transformation optics.

Journal of the Optical Society of America. A, Optics, image science, and vision

Xu BB, Jiang WX, Yu GX, Cui TJ.
PMID: 24979647
J Opt Soc Am A Opt Image Sci Vis. 2014 May 01;31(5):1135-40. doi: 10.1364/JOSAA.31.001135.

We propose and design a kind of annular focusing lens based on transformation optics. Based on the method of eigen-mode expansions, closed-form expressions are derived to analyze the proposed annular lens rigorously. We show that the annular lens has...

Adjuvant chemotherapy plus radiotherapy is superior to chemotherapy following surgical treatment of stage IIIA N2 non-small-cell lung cancer.

OncoTargets and therapy

Lei T, Xu XL, Chen W, Xu YP, Mao WM.
PMID: 26966380
Onco Targets Ther. 2016 Feb 24;9:921-8. doi: 10.2147/OTT.S95517. eCollection 2016.

The use of additional radiotherapy for resected stage IIIA N2 non-small-cell lung cancer in the setting of standard adjuvant chemotherapy remains controversial. A comprehensive search (last search updated in March 2015) for relevant studies comparing patients with stage IIIA...

Total Synthesis of (+)-Aplykurodinone-1.

Organic letters

Xu B, Xun W, Wang T, Qiu FG.
PMID: 28857569
Org Lett. 2017 Sep 15;19(18):4861-4863. doi: 10.1021/acs.orglett.7b02350. Epub 2017 Aug 31.

Starting from (R)-citronellic acid and (R)-seudenol, the total synthesis of (+)-aplykurodinone-1, a highly degraded marine steroid, has been achieved in 11 steps and in 19% overall yield with excellent stereochemical control. In addition to the features such as an...

Immobilization of Carbonylcobalt Catalyst by Poly(4-vinylpyridine) (P4VP) through N→Co Coordination Bonds: The Promotional Effect of Pyridine and the Reusability of Polymer Catalyst.

Chemistry, an Asian journal

Liu YB, Wang YN, Lu HM, Liang S, Xu BL, Fan YN.
PMID: 27677154
Chem Asian J. 2016 Nov 22;11(22):3159-3164. doi: 10.1002/asia.201601100. Epub 2016 Oct 21.

A carbonylcobalt catalyst, immobilized by poly(4-vinylpyridine) (P4VP) through N→Co coordination bonds, has been prepared by solvothermal method. It has been revealed that the pyridine fragments in the polymer catalyst act not only as promoters to improve the catalytic performance...

Second-harmonic generation at 532 nm in K(3)B(6)O(10)Br crystal.

Optics letters

Xu B, Xia M, Wang X, Li R, Chen C.
PMID: 25768185
Opt Lett. 2015 Mar 15;40(6):1073-6. doi: 10.1364/OL.40.001073.

We demonstrate that an average power of 45.5 W at 532 nm is obtained with a 13 mm length K3B6O10Br (KBB) crystal corresponding to a conversion efficiency of 36.5% for the first time. The power stability of the 532...

The thickness-dependent band gap and defect features of ultrathin ZrO2 films studied by spectroscopic ellipsometry.

Physical chemistry chemical physics : PCCP

Xu JP, Zhang RJ, Zhang Y, Wang ZY, Chen L, Huang QH, Lu HL, Wang SY, Zheng YX, Chen LY.
PMID: 26752103
Phys Chem Chem Phys. 2016 Jan 28;18(4):3316-21. doi: 10.1039/c5cp05592j.

The band gap and defect features of ultrathin ZrO2 films with varying thicknesses have been investigated by spectroscopic ellipsometry through the point-by-point data inversion method. The ε2-sprectra in the 3-6 eV range are extracted based on an optical model...

Antioxidant and Hypoglycemic Activities of Exopolysaccharide by Submerged Culture of Inocutus Hispidus.

Indian journal of pharmaceutical sciences

Liu SH, Sun SW, Tian ZF, Wu JY, Li XL, Xu CP.
PMID: 26180285
Indian J Pharm Sci. 2015 May-Jun;77(3):361-5. doi: 10.4103/0250-474x.159679.

This work was to investigate the hypoglycemic and antioxidant activities of the exopolysaccharides produced in a stirred-tank bioreactor by Inocutus hispidus. The exopolysaccharides showed significant antioxidant activities, up to 70.7±2.5% inhibition of hydroxyl radicals, 50% inhibition of 2,2-diphenyl-1-picrylhydrazyl radicals,...

TBAI-Catalyzed/Water-Assisted Double C-S Bond Formations: An Efficient Approach to Sulfides through Metal-Free Three-Component Reactions.

Chemistry (Weinheim an der Bergstrasse, Germany)

Chu XQ, Xu XP, Ji SJ.
PMID: 27433997
Chemistry. 2016 Sep 26;22(40):14181-5. doi: 10.1002/chem.201603099. Epub 2016 Aug 17.

An aqueous catalytic method for double C-S bond formations that involves alcohol derivatives, organic halides, and sodium thiosulfate has been developed. A diverse range of functionalized sulfides, including pharmaceutical and biological derivatives, can be obtained in an efficient and...

The mechanism of the effect of U18666a on blocking the activity of 3β-hydroxysterol Δ-24-reductase (DHCR24): molecular dynamics simulation study and free energy analysis.

Journal of molecular modeling

Quan X, Chen X, Sun D, Xu B, Zhao L, Shi X, Liu H, Gao B, Lu X.
PMID: 26815033
J Mol Model. 2016 Feb;22(2):46. doi: 10.1007/s00894-016-2907-2. Epub 2016 Jan 27.

DHCR24 encodes 3β-hydroxysterol-Δ(24)-reductase (DHCR24) catalyzing the cholesterol synthesis from desmosterol using the flavin adenine dinucleotide (FAD) as a co-factor. It is generally accepted that U18666a inhibits the reductase activity of DHCR24, but the detailed mechanism remains elusive. To explore...

In Situ Observation of Light Illumination-Induced Degradation in Organometal Mixed-Halide Perovskite Films.

ACS applied materials & interfaces

Xu RP, Li YQ, Jin TY, Liu YQ, Bao QY, O'Carroll C, Tang JX.
PMID: 29389110
ACS Appl Mater Interfaces. 2018 Feb 21;10(7):6737-6746. doi: 10.1021/acsami.7b18389. Epub 2018 Feb 12.

Organometal mixed-halide perovskite materials hold great promise for next-generation solar cells, light-emitting diodes, lasers, and photodetectors. Except for the rapid progress in the efficiency of perovskite-based devices, the stability issue over prolonged light illumination has severely hindered their practical...

Gold-catalyzed Fluorination of Alkynyl Esters and Ketones: Efficient Access to Fluorinated 1,3-Dicarbonyl Compounds.

Advanced synthesis & catalysis

Zeng X, Lu Z, Liu S, Hammond GB, Xu B.
PMID: 29483850
Adv Synth Catal. 2017 Nov 23;359(22):4062-4066. doi: 10.1002/adsc.201701179. Epub 2017 Oct 05.

We developed an efficient synthesis of 2-fluoro-1,3-dicarbonyl compounds using readily available alkynyl ketones or esters as starting material. The key step is the insertion of hydrogen fluoride (HF) to the gold carbene intermediate generated from cationic gold catalyzed addition...

Showing 1 to 12 of 2641 entries