Catalytic materials bearing multiple sulfonic acid functional groups and positioned at varying distances from one another on the surface of mesoporous solids are prepared to explore the effects that the spatial arrangement of active sites have on catalytic activity and selectivity. A series of organosiloxane precursors containing either disulfide or sulfonate ester functionalities (synthons of ...

A standardized assay in 96-well microtiter plates for syncytium-inducing (SI) human immunodeficiency virus type 1 phenotype detection using MT-2 cells has been developed. SI variants were found in 67% of the patients with advanced human immunodeficiency virus disease. The occurrence of the SI phenotype increased with lower CD4+ counts. There was no association between p24 antigenemia and the SI...

Si has been suggested as an essential element, and may be important in optimal bone, skin and cardiovascular health. However, there are few estimates of dietary Si intakes in man, especially in a UK population. Following the development of a UK food composition database for Si, the aim of the present study was to investigate dietary intakes of Si amongst healthy women aged over 60 years and to ...

A distinctly temperature-dependent Nernst coefficient, ν, which is strongly enhanced over that of LaCu(2)Si(2), is observed between T=2 and 300 K for CeCu(2)Si(2) and Ce(0.8)La(0.2)Cu(2)Si(2). The enhanced ν(T) is determined by the asymmetry of the on-site Kondo (conduction electron -4f electron) scattering rate. Taking into account the measured Hall mobility, μ(H), the highly unusual thermopow...

First-principles optical-response calculations of oxidized and strained Si structures are presented. Local Si lattice deformations accompanying the oxidation of Si bulk bonds cause pronounced optical anisotropies that account very well for the reflectance difference signal measured during oxide growth Yasuda et al., Phys. Rev. Lett. 87, 037403 2001 . In contrast, calculations for various energe...

The hemocompatibility of plasma-treated, silicon-incorporated, diamond-like carbon (Si-DLC) films was investigated. Si-DLC films with a Si concentration of 2at.% were prepared on Si (100) or Nitinol substrates using a capacitively coupled radiofrequency plasma-assisted chemical vapor deposition method using a mixed gas of benzene (C(6)H(6)) and diluted silane (SiH(4):H(2)=10:90). The Si-DLC fil...

In the title mol-ecule, C(15)H(23)Cl(3)N(2)Si, the Si atom is penta-coordinated by two N atoms [Si-N = 1.780 (3) and 1.931 (3) Å] from the benzamidinate ligand and three chloride anions [Si-Cl = 2.0711 (14)-2.1449 (14) Å] in a distorted trigonal-bipyramidal geometry.

We performed a constrained search, combined with density-functional theory optimization, of low-energy geometric structures of silicon clusters Si(39), Si(40), Si(50), Si(60), Si(70), and Si(80). We used fullerene cages as structural motifs to construct initial configurations of endohedral fullerene structures. For Si(39), we examined six endohedral fullerene structures using all six homolog C(...

1. Dept. of Sports and Wellbeing, Arts & Sports, Hanyang University, Ansan-si, Korea 2. Dept. of Beauty & Health, Jungwon University, Goesan-gun, Korea 3. Dept. of Sports Rehabilitation, Arts & Sports, Bucheon University, Bucheon-si, Korea 4. Sports and Health Care Major, Korea National University of Transportation, Chungju-si, Korea 5. College of Science and Technology, Konkuk University, Chun...

We defined Systemic inflammation (SI) as a "typical, multi-syndrome, phase-specific pathological process, developing from systemic damage and characterized by the total inflammatory reactivity of endotheliocytes, plasma and blood cell factors, connective tissue and, at the final stage, by microcirculatory disorders in vital organs and tissues." The goal of the work: to determine methodological ...