1,766 Result(s)
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Article
Search for non-minimal Higgs bosons inZ 0 decays
We report on a search for the neutral and charged Higgs bosons predicted by models of spontaneous symmetry breaking with more than one Higgs doublet field. No signals are observed. We set model-independent lim...
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Measurement of cross sections and leptonic forward-backward asymmetries at theZ pole and determination of electroweak parameters
We report on the measurement of the leptonic and hadronic cross sections and leptonic forward-backward asymmetries at theZ peak with the L3 detector at LEP. The total luminosity of 40.8 pb−1 collected in the year...
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Measurement of the branching ratiosb →e ν X, μ ν X, τ ν X andν X
The inclusive semileptonic branching ratios b→eνX,μ νX,τ νX andνX have been measured at LEP with the L3 detector. The analysis is based on 2-jet hadronic Z decays obtained in the data collected between 1991 and 1...
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Study on microstructures and properties of several kinds of hot working die steel
This paper deals with the microstructures and properties of AISI H13(4Cr5MoSiV1), UHB QRO 90M and 4Cr3Mo2V steels, and then discusses the means of improving the service life of hot working die. The results sho...
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Improvement of heating method for measuring the wetness of flowing wet steam
In this paper, an improvement of heating method for measuring wetness of the flowing wet steam is developed, the basic principle of the heating method is presented and the mathematical model has been built for...
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Article
Human neutralizing monoclonal antibodies of the IgG1 subtype protect against mucosal simian–human immunodeficiency virus infection
Although maternal human immunodeficiency virus type 1 (HIV-1) transmission occurs during gestation, intrapartum and postpartum (by breast-feeding), 50–70% of all infected children seem to acquire HIV-1 shortly...
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Article
Histological grading in ductal carcinomain situ of the breast
Objective: To study the significance of histological grading as a prognostic factor in ductal carcinomain situ of the breast Methods: According to the Van Nuy’s classification, 32 cases of ductal carcinomain situ
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Article
Strong-Light Photoinhibition Treatment Accelerates the Changes of Protein Secondary Structures in Triton-Treated Photosystem I and Photosystem II Complexes
Changes in the protein secondary structure and electron transport activity of the Triton X-100-treated photosystem I (PSI) and photosystem II (PSII) complexes after strong illumination treatment were studied u...
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Article
Preparation and properties of poly(dimer acid-sebacic acid) copolymer
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Article
Changes of ATP and ADP in Cultured Astrocytes Under and After in Vitro Ischemia
A very large body of evidence from in vivo studies has been accumulated on a link between the change of energy and cell survival/apoptosis. Using an in vitro ischemia model, we have previously shown that ische...
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Photosynthesis research in the People's Republic of China1
The first research paper on photosynthesis in China was published by T.T. Li2 in 1929. Two photosynthesis laboratories were established in Shanghai and Bei**g in the 1950s and the 1960s, respectively. A photopho...
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Article
Binding affinity of hydroxamate inhibitors of matrix metalloproteinase-2
Here we report molecular dynamics (MD) and free energy perturbation (FEP) simulations applied to hydroxamate-matrix metalloproteinase-2 (MMP-2) complex systems. We have developed some new force field parameter...
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Article
Hierarchical nanoparticle assemblies formed by decorating breath figures
The combination of two self-assembly processes on different length scales leads to the formation of hierarchically structured nanoparticle arrays. Here, the formation of spherical cavities, or 'breath figures'...
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Article
Influence of TAC on dispersion of aqueous nano alumina suspension
The stability of aqueous nano alumina powder suspensions with and without dispersant tri-ammonium citrate (TAC) was investigated by measuring zeta potential at different pH values. The isoelectric point (IEP) ...
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Article
Androgen receptor regulates expression of skeletal muscle-specific proteins and muscle cell types
C2C12 myoblasts expressing the androgen receptor (AR) were used to analyze the role of androgen-AR signaling pathway in skeletal muscle development. Marked up-regulation of AR expression was observed in different...
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Article
Synthesis of Cordierite by decomposition of metal nitrates on the surface of carbon black powder
Cordierite precursor was obtained through a process, which involved the decomposition of metal nitrates on the surface of ultrafine carbon black powder between 100–300°C and the gasification of the carbon blac...
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Article
Design of a terrain tentative sensing machine/sensor for a mobile robot
TTSMS is a typical four-link terrain tentative sensing machine/sensor. It can sense some parameters of the front terrain for mobile robots and simply process the sensing data to obtain a simple model of the te...
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Article
Numerical Simulation of Turbulent Jets with Lateral Injection into a Crossflow
In this paper, Numerical simulations of mean velocity and turbulent kinetic energy fields are presented for three-dimensional lateral jet in crossflow, at the injection angles of −60° and −30 °. The RNG k-ε turbu...
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Article
FA composition of the oil extracted from farmed atlantic salmon (Salmo salar L.) viscera
The FA composition of visceral oil extracted from farmed Atlantic salmon (Salmo salar L.) viscera was studied. Seventeen FA were identified in the extracted visceral oil, and the major FA were 18∶1n9, 16∶0, 16∶1n...
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Distinct effects of different concentrations of sodium selenite on apoptosis, cell cycle, and gene expression profile in acute promyeloytic leukemia-derived NB4 cells
Selenium at a low concentration has a chemopreventive role against cancer, while at a high concentration, it exerts a direct antitumor effect. However, the mechanisms remain elusive. In this article, we discov...