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Tissue response to silicone tubes used to repair human median and ulnar nerves

Silicone tubes of appropriate sizes were used to enclose the injured zone of transsected ulnar and median nerves in the human forearm as an alternative to conventional microsurgical repair of the nerve trunk. A gap measuring 3-5 mm was left intentionally between the nerve ends inside the tube. The clinical early results from a prospective randomised study that compared these two principles have re

Early prenatal diagnosis of cord entanglement in monoamniotic multiple pregnancies

OBJECTIVES: Cord entanglement is a severe complication in monoamniotic multiple pregnancies. Three cases were reviewed to determine how early ultrasound diagnosis might improve counselling and management. METHODS: In two monoamniotic twin and one dichorionic diamniotic triplet pregnancies, cord entanglement was detected between 10 and 18 gestational weeks by color Doppler and pulsed Doppler veloci

Influence of band state mixing on interband magnetotunnelling in broken-gap heterostructures

We investigate in detail the effect of electron and light- and heavy-hole state mixing on the transmission coefficients and current-voltage characteristics of interband tunnelling broken-gap heterostructures in the presence of a quantizing magnetic field perpendicular to the interfaces. Double-barrier and barrierless resonant tunnelling structures made from InAs, A1Sb, and GaSb are considered. The

The Institutional Root of China's Rural Industry and Gradual Reform

China's transition from planned to market economy is at present one of the topics most discussed among researchers. According to almost any version of mainstream property rights theory, the rapid privatization or what has been described as the "East European model" basically represents the correct approach to transformation, while the gradual transition, or the "Chinese model", should represent a

Linoleic acid-stimulated vascular adhesion molecule-1 expression in endothelial cells depends on nuclear factor-kappaB activation.

Endothelial activation is an important step in atherogenesis. In addition to established cardiovascular risk factors, such as hypercholesterolemia, hypertension, diabetes mellitus, and homocysteinemia, high plasma levels of triglyceride-rich lipoproteins may be an important cause of endothelial activation as well. Free fatty acids hydrolyzed from core triglycerides of these particles can exert bot

Spectroscopic studies of random telegraph noise in small InP quantum dots in GaxIn1-xP

We have observed and investigated random telegraph noise in the photoluminescence (PL) from small InP quantum dots (QDs) in GaInP. Very few of the QDs exhibit switching between two states, which have similar total intensities, but distinctly different spectra. Usually, one of the states dominates at low excitation power and the other at high excitation power. The switching occurs on the time scale

Sympathetic nerve stimulation influences mucociliary activity in the rabbit maxillary sinus

The effect of preganglionic sympathetic nerve stimulation on mucociliary activity in the rabbit maxillary sinus was investigated in vivo. Response to nerve stimulation was recorded photoelectrically and expressed as a percentage of the basal mucociliary activity prior to stimulation. Nerve stimulation (15 V, 5 ms) for 60 s at 2, 10 and 20 Hz stimulated mucociliary activity, the maximum increase be

Effects of different treatments on postural performance in patients with cervical root compression. A randomized prospective study assessing the importance of the neck in postural control

Patients with cervical root compression were used as a "model" to investigate the possible importance of neck disorders and cervical sensory information in postural control. We assessed postural performance with posturography before and after treatment in 71 consecutive patients with MRI-verified cervical root compression without medullary compression. The patients were randomized to surgery (n =

A coupled cluster study of the oriented circular dichroism of the n ->pi* electronic transition in cyclopropanone and natural optical active related structures

We present an ab initio study of the n --> pi(*) electronic excitation energy together with the corresponding oscillator strength and rotatory strength tensor for two optically active cyclopropanone related structures: S,S-dimethylcyclopropanone and R,R-t-butylcyclopropanone. We discuss and compare the available experimental data for the n --> pi(*) electronic excitation energy and rotatory streng