Nonresonant second harmonic generation (SHG) phase and amplitude measurements obtained from the silica-water interface at varying pH values an ionic strength of 0.5 M point to existence a nonlinear susceptibility term, which we call ?X(3), that is associated with 90° shift. Including this contribution in model for total effective second-order produces reasonable estimates interfacial potentials...

We study the oscillatory behavior of solution to second order nonlinear differential equations with a sub-linear neutral term $$ \big(a(t)[(x(t)+p(t)x^{\alpha}(\tau(t)))']^{\gamma}\big)'+q(t)x^{\beta}(\sigma(t))=0, \quad t\geq t_0>0. A new criterion is established that improves related results reported in literature. Moreover, some examples are provided illustrate main results.

our purpose was to determine the effect of epidural analgesia on nulliparous labor and delivery. nonnal term nulliparous women in spontaneous labor were divided into two groups in a quazi-experimental study, 100 in each group. the first group received epidural analgesia and the second had no analgesia at all. in the first group, an epidural catheter was placed in 3-4 cm cervical dilatation and ...

objective(s): there is controversial evidence about the effect of methamphetamine (meth) on spatial memory. we tested the time- dependent effects of meth on spatial short-term (working) and long-term (reference) memory in meth –sensitized and withdrawn rats in the morris water maze. materials and methods: rats were sensitized to meth (2 mg/kg, daily/5 days, sc). rats were trained in water maze ...

long –term use of some of insecticides on rice striped stem borer (chilo suppressalis walk.) and for the reason the urgency of use of new suspension insecticide an experiment carried out, in paddy fields under condition at rice research institute in rasht, iran.treatments were as follow;1-fipronilg in first generation 2-fipronil g. in second generation 3-fipronil sc in first generation 0.5 lit....