BACKGROUND AND PURPOSE It has previously been demonstrated that comparison of signal intensity (SI) between selected brain structures on T1-weighted images enables distinction between the absence or presence of hypoxic-ischemic (HI) brain injury in young infants. The aim of the present study was to assess whether this method of brain structure T1-weighted SI comparison also enables prediction o...

The specific dependence of the Si content on the structural and optical properties of O- and H-free Si-rich nitride (SiNx>1.33) thin films deposited by magnetron sputtering is investigated. A semiempirical relation between the composition and the refractive index was found. In the absence of Si-H, N-H, and Si-O vibration modes in the FTIR spectra, the transverse and longitudinal optical (TO-LO)...

Perchlorinated polysilanes were synthesized by polymerization of tetrachlorosilane under cold plasma conditions with hydrogen as a reducing agent. Subsequent selective cleavage of the resulting polymer yielded oligochlorosilanes Si(n)Cl(2) (n) (+2) (n = 2, 3) from which the octachlorotrisilane (n = 3, Cl(8)Si(3), OCTS) was used as a novel precursor for the synthesis of single-crystalline Si nan...

The equilibrium molecular structure of octaphenyloctasilsesquioxane Si(8)O(12)Ph(8) in the gas phase has been determined by electron diffraction. It was found to have D(4) point-group symmetry, with Si-O bond lengths of 1.634(15)-1.645(19) A, and a narrow range [147.5(45)-149.8(24) degrees] of Si-O-Si angles. The structures of Si(8)O(12)(p-tolyl)(8) and Si(8)O(12)(p-ClCH(2)C(6)H(4))(8) have bee...

When triisobutylaluminum (AliBu(3)) is added to solutions containing methylaluminoxane (MAO) and rac-[Me(2)Si(ind)(2)ZrCl(2)] (ind: indenyl) in C(6)D(6), NMR spectra show that methyl-bridged mixed-alkylaluminum dimers Al(mu-Me)(2)Me(4-x)iBu(x) predominate. These dimers react with MAO under partial transfer of isobutyl groups and induce a conversion of the initially prevailing cationic trimethyl...

the relation of shock index (si) and revised trauma score (rts) with trauma patients mortality after first 24 hours of admission at khatam-al anbia hospital in iranshahr heydarikhayat n[1], rezaee hematabadi ma[2], rasouli d[3], kalbali a[4] received: 11 ay , 2012 accepted: 5aug, 2012abstract background & aims: trauma is one of the most important health problems and a leading cause of death in ...

BACKGROUND Suicidal ideation (SI) is a common mental health problem. Variability in intensity of SI over time has been linked to suicidal behavior, yet little is known about the temporal course of SI. OBJECTIVE The primary aim was to identify prototypical trajectories of SI in the general population and, secondarily, to examine whether receiving Web-based self-help for SI, psychiatric symptom...

Optimizing substrate characterization to grow 2D Si layers on surfaces is a major issue toward the development of synthesis techniques promising silicene. We have used inverse photoemission spectroscopy (IPES) study electronic band structure an ordered layer the3×3-Ag/Si(111) surface (3-Ag). Exploiting large upwards bending the3-Ag substrate, we could investigate evolution unoccupied and interf...

The lateral charge transport in films comprising metal complexes bound to DNA monolayers on Si electrodes was measured by scanning electrochemical microscopy (SECM) in the steady-state feedback mode. Single-stranded (ss) DNA monolayers covalently bonded to the Si surface were prepared by automated solid-phase synthesis on hydroxyl-terminated n-alkyl monolayers at atomically flat Si(111)–H surfa...

The electronic structure and especially the band gap of Sin clusters (n = 3–45 atoms) is studied by photoelectron spectroscopy. Contrary to expectations of quantum conf nement, almost all clusters studied here have a band gap smaller than that of crystalline Si or even display a continuous (metallic) density of states. We attribute this to covalent bond formation analogous to the reconstruction...