The aim of this study is to measure the level of both the superoxide dismutase (SOD) enzyme and its substrate, superoxide radicals, in the wall of varicose veins. A total of 44 vein specimens were collected from 24 patients who underwent surgery for varicose veins at Asir Central Hospital (ACH), Abha, Saudi Arabia during the period from October 1999 to November 2000. The patients were 4 males a...

Chronic venous insufficiency (CVI) describes diseases of the lower limb veins in which venous return is impaired and varicose veins and skin ulceration may develop. The roles o f purinergic signalling in regulation of vascular tone in the long saphenous vein (LSV) and in the trophic changes occurring in LSV muscle cells and epidermal keratinocytes in lower leg skin were studied. The purinergic ...

We reported previously that the neuropeptide oxytocin attenuates stress-induced hypothalamo-pituitary-adrenal (HPA) activity and anxiety behavior. This study sought to identify forebrain target sites through which oxytocin may mediate its anti-stress effects. Ovariectomized, estradiol-treated rats received intracerebroventricular infusions of oxytocin (1 or 10 ng/hr) or vasopressin (10 ng/hr), ...

Biofuel production has increased significantly in several countries recent decades. Different evaluation techniques are required for their characterization. The study measures the properties of obtained biodiesel and a commercial diesel sample, using open circuit potential, linear scanning voltammetry electrochemical impedance spectroscopy. transesterification reaction between sunflower oil met...

The Laacher See volcano (LSV) is located at the western margin of Neuwied Basin, central part Middle Rhine Basin Germany. Its paroxysmal Plinian eruption c. 13 ka ago (Laacher event; LSE) deposited a complex tephra sequence in whilst distal ashes became one most important chronostratigraphic markers Central Europe. However, some other impacts on landscape formation have thus far been largely ne...

We report here on differential linear scan voltammetry, DLSV, that combines the working principles of linear scan voltammetry, LSV, and the numerous existing pulsed voltammetry techniques. DLSV preserves the information from continuous interrogation in voltage and high accuracy that LSV provides about electrochemical processes, and the much better sensitivity of differential pulsed techniques. ...

In this paper, we introduce an algorithm to delineate elementary forms on Digital Elevation Models (DEMs). Elementary forms are defined by constant values of fundamental morphometric properties and limited by discontinuities of these properties. A multiresolution segmentation technique was customized to partition the layers of altitude derivatives into homogeneous divisions through a self-scala...

Text The phase one results from the randomized Radial artery versus Saphenous Vein Patency (RSVP) trial are published in the current issue of the Journal [1]. Fifty-two patients had quantitative angiography with Thrombolysis in Myocardial Infarction (TIMI) flow assessment, approximately 3 months after coronary bypass graft surgery. A subset of 7 patients had in-vivo assessment of graft flow and...

PURPOSE To assess long-term anatomic and visual outcomes and associated complications of lens-sparing vitrectomy (LSV) for treatment of tractional retinal detachments (TRDs) associated with stages 4B and 5 retinopathy of prematurity (ROP). METHODS We performed a retrospective review of medical records and data analyses of consecutive patients who presented with stages 4B and 5 ROP and underwe...