Objective: To investigate patient’s knowledge and beliefs regarding emergency contraception and its use. Study Design: Cross-sectional descriptive study Place and Duration of Study: A six months cross-sectional descriptive study, from 1st July 2009 till 31st December 2009 carried out at Shifa international Hospital (SIH) and Shifa community health centre (SFCHC) Islamabad. Patients and Methods:...

The SiH(4)+H-->SiH(3)+H(2) reaction has been investigated by the quasiclassical trajectory (QCT) method on a recent global ab initio potential energy surface [M. Wang et al., J. Chem. Phys. 124, 234311 (2006)]. The integral cross section as a function of collision energy and thermal rate coefficient for the temperature range of 300-1600 K have been obtained. At the collision energy of 9.41 kcal...

1-x x This paper deals with the structural properties of a-Si:H/a-Si C :H multilayers 4 4 4 deposited by glow-discharge decomposition of SiH and SiH and CH mixtures. The main feature of the rf plasma reactor is an automated substrate holder. The plasma stabilization time 1-x x and its influence on the multilayer obtained is discussed. A series of a-Si:H/a-Si C :H multilayers has been deposited ...

In this work, a-C:H:Si (DLC-Si) films were produced onto crystalline silicon and polycarbonate substrates by the rf-PACVD technique from gaseous mixtures of CH 4 + SiH 4 and C 2 H 2 + SiH 4 . The effects of self-bias and gas composition upon mechanical and optical properties of the films were investigated. Micro-hardness, residual stress, surface roughness and refractive index measurements were...

A novel type of deprotonative arylation of nucleophiles was conducted using Et(3)SiH/cat. t-Bu-P4 and the powerful S(N)Ar reactions of aryl fluorides were accomplished using alcohols and malonates as nucleophiles.

The phosphorolysis of cellobiose was first demonstrated by Sih and McBee (1955a, b). These workers found that cellobiose phosphorylase was present in cell-free extracts of Clostridium thermocellum. Recently cellobiose phosphorylase has been reported from two other bacteria, Ruminococcus flavefaciens (Ayers, 1958, 1959), and Cellvibrio gilvus (Hulcher and King, 1958). This enzyme also catalyzes ...

Spontaneous Intracranial Hypotension is a syndrome involving reduced intracranial pressure secondary to a dural tear which occurs mostly due to connective tissue disorders such as Marfans Syndrome, and Ehler Danlos Syndrome. Patients with dural ectasias leading to CSF leakage into the subdural or epidural space classically present with orthostatic headaches and cranial nerve deficits mostly see...

X.-L. Tan, MD, PhD Q.-D. Yang, MD, MSc X.-J. Liu, MD B. Xiao, MD, PhD B.-S. Tang, MD A 39-year-old woman developed orthostatic headache. Cranial MRI indicated spontaneous intracranial hypotension (SIH) (figure, A). Spinal MRI suggested CSF leaks at C1–2, C2–3, and C5–6 levels (figure, B and C), but both radionuclide cisternography and CT myelography (immediate and 3-hour delayed scanning) showe...

Background: Intense stress can change pain perception and induce hyperalgesia; a phenomenon called stress-induced hyperalgesia (SIH). However, the neurobiological mechanism of this effect remains unclear. The present study aimed to investigate the effect of the spinal cord µ-opioid receptors (MOR) and α2-adrenergic receptors (α2-AR) on pain sensation in rats with SIH. Methods: Eighteen Sprague-...

Periodic mesoporous hydridosilica, PMHS, is shown for the first time to function as both a host and a mild reducing agent toward noble metal ions. In this archetypical study, PMHS microspheres react with aqueous Ag(I) solutions to form Ag(0) nanoparticles housed in different pore locations of the mesostructure. The dominant reductive nucleation and growth process involves SiH groups located wit...