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Showing 25 to 36 of 29869 entries
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β-(Trifluoromethyl)vinyl sulfonium salts: preparation and reactions with active methylene and methenyl compounds.

The Journal of organic chemistry

Lin H, Shen Q, Lu L.
PMID: 21797270
J Org Chem. 2011 Sep 16;76(18):7359-69. doi: 10.1021/jo2009033. Epub 2011 Aug 17.

Two trifluoromethyl-substituted building blocks β-(trifluoromethyl)vinyl sulfonium salts 1 and 2 were developed. Reactions of β-(trifluoromethyl)vinyl sulfonium salt 1 with active methylene compounds containing electron-withdrawing groups using DBU as the base in DMSO occurred to give trifluoromethyl-substituted cyclopropane derivatives 7...

Preparation of supported Mo(2)C-based catalysts from organic-inorganic hybrid precursor for hydrogen production from methanol decomposition.

Chemical communications (Cambridge, England)

Gao Q, Zhang C, Wang S, Shen W, Zhang Y, Xu H, Tang Y.
PMID: 20694268
Chem Commun (Camb). 2010 Sep 21;46(35):6494-6. doi: 10.1039/c0cc01430c. Epub 2010 Aug 09.

An effective and safe route is proposed to prepare supported Mo(2)C-based catalysts from organic-inorganic hybrids, which exhibit high activity and stability for producing H(2) from methanol catalytic decomposition.

Simultaneous utilization of glucose and xylose for lipid production by Trichosporon cutaneum.

Biotechnology for biofuels

Hu C, Wu S, Wang Q, Jin G, Shen H, Zhao ZK.
PMID: 21864398
Biotechnol Biofuels. 2011 Aug 24;4(1):25. doi: 10.1186/1754-6834-4-25.

BACKGROUND: Biochemical conversion of lignocellulose hydrolysates remains challenging, largely because most microbial processes have markedly reduced efficiency in the presence of both hexoses and pentoses. Thus, identification of microorganisms capable of efficient and simultaneous utilization of both glucose and...

Insights from ecological niche modeling on the taxonomic distinction and niche differentiation between the black-spotted and red-spotted tokay geckoes (Gekko gecko).

Ecology and evolution

Zhang Y, Chen C, Li L, Zhao C, Chen W, Huang Y.
PMID: 25535555
Ecol Evol. 2014 Sep;4(17):3383-94. doi: 10.1002/ece3.1183. Epub 2014 Aug 18.

The black-spotted tokay and the red-spotted tokay are morphologically distinct and have largely allopatric distributions. The black-spotted tokay is characterized by a small body size and dark skin with sundry spots, while the red-spotted tokay has a relatively large...

First-principles study of the effect of functional groups on polyaniline backbone.

Scientific reports

Chen XP, Jiang JK, Liang QH, Yang N, Ye HY, Cai M, Shen L, Yang DG, Ren TL.
PMID: 26584671
Sci Rep. 2015 Nov 20;5:16907. doi: 10.1038/srep16907.

We present a first-principles density functional theory study focused on how the chemical and electronic properties of polyaniline are adjusted by introducing suitable substituents on a polymer backbone. Analyses of the obtained energy barriers, reaction energies and minimum energy...

Propagation of thickness-twist waves in elastic plates with periodically varying thickness and phononic crystals.

Ultrasonics

Zhu J, Chen W, Yang J.
PMID: 24924785
Ultrasonics. 2014 Sep;54(7):1899-903. doi: 10.1016/j.ultras.2014.05.016. Epub 2014 Jun 02.

We study the propagation of thickness-twist (TT) waves in a crystal plate of AT-cut quartz with periodically varying, piecewise constant thickness. The scalar differential equation by Tiersten and Smythe is employed. The problem is found to be mathematically equivalent...

Tunable Shape Memory Performances via Multilayer Assembly of Thermoplastic Polyurethane and Polycaprolactone.

ACS applied materials & interfaces

Zheng Y, Dong R, Shen J, Guo S.
PMID: 26713358
ACS Appl Mater Interfaces. 2016 Jan 20;8(2):1371-80. doi: 10.1021/acsami.5b10246. Epub 2016 Jan 08.

Shape memory materials containing alternating layers of thermoplastic polyurethane (TPU) and polycaprolactone (PCL) were fabricated through layer-multiplying extrusion. As a type of special co-continuous morphology, the multilayer structure had stable and well-defined continuous layer spaces and could be controlled...

Seasonal Mass Changes and Crustal Vertical Deformations Constrained by GPS and GRACE in Northeastern Tibet.

Sensors (Basel, Switzerland)

Pan Y, Shen WB, Hwang C, Liao C, Zhang T, Zhang G.
PMID: 27490550
Sensors (Basel). 2016 Aug 02;16(8). doi: 10.3390/s16081211.

Surface vertical deformation includes the Earth's elastic response to mass loading on or near the surface. Continuous Global Positioning System (CGPS) stations record such deformations to estimate seasonal and secular mass changes. We used 41 CGPS stations to construct...

Full Tensor Eigenvector Analysis on Air-Borne Magnetic Gradiometer Data for the Detection of Dipole-Like Magnetic Sources.

Sensors (Basel, Switzerland)

Zuo B, Wang L, Chen W.
PMID: 28850054
Sensors (Basel). 2017 Aug 29;17(9). doi: 10.3390/s17091976.

The detection of dipole-like sources, such as unexploded ordnances (UXO) and other metallic objects, based on a magnetic gradiometer system, has been increasingly applied in recent years. In this paper, a novel dipole-like source detection algorithm, based on eigenvector...

LncRNA AFAP1-AS1 promotes growth and metastasis of cholangiocarcinoma cells.

Oncotarget

Shi X, Zhang H, Wang M, Xu X, Zhao Y, He R, Zhang M, Zhou M, Li X, Peng F, Shi C, Shen M, Wang X, Guo X, Qin R.
PMID: 28938565
Oncotarget. 2017 Apr 06;8(35):58394-58404. doi: 10.18632/oncotarget.16880. eCollection 2017 Aug 29.

We investigated the role of actin filament associated protein 1 antisense RNA1 (AFAP1-AS1) lncRNA in promoting cholangiocarcinoma (CCA). qRT-PCR analysis of patient samples showed that AFAP1-AS1 expression was higher in CCA tumors than matched adjacent non-tumor tissue. AFAP1-AS1 levels...

Effectiveness and safety of PD-1/PD-L1 inhibitors in the treatment of solid tumors: a systematic review and meta-analysis.

Oncotarget

Wang X, Bao Z, Zhang X, Li F, Lai T, Cao C, Chen Z, Li W, Shen H, Ying S.
PMID: 28938692
Oncotarget. 2017 May 31;8(35):59901-59914. doi: 10.18632/oncotarget.18316. eCollection 2017 Aug 29.

BACKGROUND: PD-1/PD-L1 inhibitors have been implicated as potentially effective anti-cancer therapies. Some clinical randomized controlled trials (RCTs) have been completed for a variety of PD-1/PD-L1 inhibitors to treat various malignancies, and more RCTs are still under way. We carried...

Online Metric-Weighted Linear Representations for Robust Visual Tracking.

IEEE transactions on pattern analysis and machine intelligence

Li X, Shen C, Dick A, Zhang ZM, Zhuang Y.
PMID: 26390446
IEEE Trans Pattern Anal Mach Intell. 2016 May;38(5):931-50. doi: 10.1109/TPAMI.2015.2469276. Epub 2015 Aug 17.

In this paper, we propose a visual tracker based on a metric-weighted linear representation of appearance. In order to capture the interdependence of different feature dimensions, we develop two online distance metric learning methods using proximity comparison information and...

Showing 25 to 36 of 29869 entries