OBJECTIVE The treatment of complex intracranial aneurysms remains challenging. One approach is the application of surgical flow alteration to treat aneurysms that are neither clippable, trappable, or coilable. The efficacy and limitations of surgical flow alteration have not yet been established. METHODS Cases of complex aneurysms treated with surgical flow alteration (proximal occlusion with...

Floods and droughts are important features of most running water ecosystems, but the alteration of natural flow regimes by recent human activities, such as dam building, raises questions related to both evolution and conservation. Among organisms inhabiting running waters, what adaptations exist for surviving floods and droughts? How will the alteration of the frequency, timing and duration of ...

Alterations of the circadian rhythms in blood pressure (BP) and heart rate (HR) have been associated with an increased cardiovascular disease risk. The influence of alcohol consumption on the circadian rhythm characteristics of BP is here examined, and the extent to which such alteration of the circadian BP rhythm contributes to cardiovascular disease

I. Eleven obese subjects fasted for 24 d, by which time their serum albumin concentration had fallen significantly. 1251-labelled albumin was injected on day 7 of fasting to allow study of albumin metabolism. 2. Although no significant alteration occurred in either the intravascular content or the absolute catabolic rate of albumin between days 7 and 24 of fasting, the mean values for both cont...

mehredjan bentonite deposit is located ~33 km southeast of khoor in isfehan province. it includes 15 discrete outcrops and occurs as layered and massive forms within a volcano-clastic sequence. bentonitization process was accompanied with development of minerals such as montmorillonite, quartz, cristobalite, calcite, kaolinite, halite, albite, orthoclase, and muscovite. the collected field and ...

wettability alteration is one of the most important methods for oil recovery from sandstone andcarbonate reservoirs. the effects of salinity, ph, temperature, and chemicals such as surfactants andfatty acids on the alteration of the wettability were described in previous studies. in recent years,attention has been directed to nanoparticles as a wettability alteration agent. the effect of somena...

traditions and manners of nuba is part of egyptian’s culture which is emerged in novelists’ works of nuba in various ways and most of the times they have been denied and objected; because ignorance and prejudice govern them, is routed in their culture and except in very few cases, they never change. the novel “playing over nuba mountains” by edris ali is one of the novels which is clearly analy...

BACKGROUND Left ventricular rotation and twist can be assessed noninvasively by speckle tracking echocardiography. We sought to characterize the effects of acute load change and change in inotropic state on rotation parameters as a measure of left ventricular (LV) contractility. METHODS Seven anesthetised juvenile pigs were studied, using direct measurement of left ventricular pressure and vo...