The objectives of the laboratory work reported here were to quantify the net rates of removal of manganese [Mn(II)] by streambed sediments collected from a metals contaminated, perennial stream system (Pinal Creek near Globe AZ) and to determine the key variable(s) responsible for the limited removal of Mn(II) observed at this field site. Pinal Creek is characterized by significant spatial grad...

Acetaminophen (APAP) overdose is the most frequent cause of acute liver failure in the US and many western countries. It is well known that APAP induces mitochondrial damage to trigger centrilobular necrosis. Emerging evidence suggests that autophagic removal of damaged mitochondria may protect against APAP-induced liver injury. Electron and confocal microscopy analysis of liver tissues reveale...

polycyclic aromatic hydrocarbons are a class of potentially hazardous chemicals of environmental and health concern. pahs are one of the most prevalent groups of contaminants found in soil. biodegradation of complex hydrocarbon usually requires the cooperation of more than single specie. in this research biotreatment of pah (phenanthrene) was studied in a solid-phase reactor using indigenous ba...

PURPOSE To describe the rationale behind elliptical and other transition designs used with the excimer laser. SETTING Casey Eye Institute, Oregon Health Sciences University, Portland, Oregon, USA. METHODS Ablation zone designs were analyzed for the number of transition points for myopia and hyperopia. The advantages and disadvantages of elliptical transition zones are demonstrated graphical...

The objective of the study was to determine age-related anatomical features and patterns growth pancreas raccoon dogs in zone removal anthropogenic load exclusion zone. For research 4 age groups were used. terminology described structures brought into compliance with International Veterinary Anatomical Nomenclature. first time it found that for dog, living a radiation zone, linear weight parame...

A model of B cell affinity selection is proposed, and an explanation of peripheral tolerance mechanisms through antibody repertoire editing is presented. We show that affinity discrimination between B cells is driven by a competition between obtaining T cell help and removal of B cells from the light zone, either through apoptosis or by a return to the dark zone of germinal centers. We demonstr...

background & importance: primary hemifacial spasm is usually caused by microvascular compression of the facial nerve at its root exit zone at brainstem without any space-occupying pathology. secondary or so-called symptomatic hemifacial spasm has an additional underlying pathology e.g. tumors leading to the microvascular compression. we review and discuss the pathophysiology and the literature ...

The lateral lumbar spinal canal may be subdivided into the subsequently necessitate fusion surgery. Other, more lateral approaches subarticular (lateral recess), the foraminal (pedicle) and the extraforaminal (far lateral) zone. Within these regions lies the “hidden zone”, an area known for its difficult surgical exposure (Fig. 1A) (Macnab, 1971). Common pathologies of this region include foram...

In the present work, we have analysed the possible involvement of ectodermal tissue in the control of interdigital mesenchymal cell death. Two types of experiments were performed in the stages previous to the onset of interdigital cell death: removal of the AER of the interdigit; removal of the dorsal ectoderm of the interdigit. After the operation embryos were sacrificed at 10-12 h intervals a...