Mechanisms of arm paresis in middle cerebral artery distribution stroke: pilot study.

The development of effective neurobiological adjuvants to rehabilitation of paresis caused by stroke will depend on understanding mechanisms of paresis. Our objective was to determine the extent to which upper-limb (UL) paresis after nonlacunar ischemic middle cerebral artery (MCA) distribution stroke is caused by infarction of posterior periventricular white matter (PVWM), where corticospinal fibers serving movement descend, and caused by infarction of the arm-hand region of precentral gyrus (ahPCG). We conducted a blinded, retrospective analysis of computed tomography and magnetic resonance imaging from a convenience sample of 64 prospectively evaluated subjects with UL paresis resulting from MCA distribution stroke.

Application of quadratic regression model for Fenton treatment of municipal landfill leachate.

The effectiveness of Fenton process in municipal landfill leachate treatment, as a pre- or post-treatment approach, has been demonstrated. However, no general recommendations of universal validity could be made in the term of optimized conditions affecting Fenton process. At the first stage of this study, collected leachate samples from Aradkooh site, Tehran, Iran, were investigated using one-factor-at-a-time method to find out optimum coagulation pH and flocculation time values.

Evaluation of the main parameters affecting the Fenton oxidation process in municipal landfill leachate treatment.

The aim of this study was to investigate the use of the Fenton oxidation process for treating leachate from a municipal solid waste landfill collected from Aradkooh site, Tehran, Iran. The focus of the study was to evaluate the process performance by COD removal efficiency. Results indicate that the optimum amounts of oxidation parameters in the Fenton process were as follows: oxidation pH = 4, H(2)O(2)/Fe(2+) molar ratio = 4-5, Fe(2+) ion dosage = 11,200-19,600 mg L(-1) and oxidation time = 20-30 min.

Alien limb syndrome and moya-moya disease.

We present the case of a 29-year-old woman with an alien limb and callosal disconnection syndrome who was diagnosed with moya-moya disease. We discuss the potential mechanisms responsible for the alien limb syndrome.

Estrogen attenuates over-expression of beta-amyloid precursor protein messager RNA in an animal model of focal ischemia.

Cerebral ischemia is a risk factor for late onset Alzheimer's disease. Since estrogen replacement therapy benefits the outcome of cerebral stroke in post-menopausal women, we designed the present study to investigate the effects of estrogen on the expression of beta-amyloid precursor protein (APP) mRNA following focal ischemia in female rats. Female rats were ovariectomized (OVX) for two weeks.