The use of digital techniques to examine the intermittent region of a turbulent jet

Voltage signals, sampled at a high rate in the intermittent region of a round jet, are analyzed to provide instantaneous velocity vector information and measures of the vorticity and dissipation scales. A clustering routine to assess the feasibility of using the voltage readings to define the vortical, nonvortical state of the flow is also utilized. The results indicate that the clustering routine is partially successful; more sophisticated discrimination techniques will be required for a complete specification

The Effects of a Wild Blueberry Diet on Hepatic and Aortic Morphology in the Obese Zucker Rat, A Model of the Metabolic Syndrome

The goal of this study is to investigate the effect of a wild blueberry diet on pathology of the metabolic syndrome (MetS) by examining the morphological and biochemical properties of the liver and aortic tissue in the obese Zucker rat (OZR), a valid model of the MetS. At 8-weeks of age, 16 Obese Zucker ras (OZR) and 16 lean Zucker rats (LZR) littermates were placed on either an 8% w/w wild blueberry (WB)-enriched isocaloric diet or an isocaloric control (C) diet for a duration of 8-weeks. At 16-weeks of age, the tissues of interest were harvested for the study. The morphological features for hepatic steatosis and glycogen were assessed utilizing a unique series of stains and were analyzed through image analysis and a histopathological review by a pathologist. The accumulation of hepatic triglyceride (TG) was also evaluated for the assessed. For the assessment of morphological features of the thoracic aorta, a series of unique stains were utilized and further analyzed through the use of image analysis to detect collagen and connective tissue, the thickness of the tunica media, the number of nuclei, and the presence of glycosaminoglycans. A significant increase in hepatic steatosis was found in the OZR compared to the LZR after image analysis and histopathological evaluation of the Hematoxylin and Eosin (H&E) stain, the Oil Red O (ORO) stain, and hepatic TG concentration. Although non-significant, image analysis of the hepatic triglycerides using the ORO stain found a trend for a decrease in hepatic TG content in the OZR-WB group compared to the OZR-C. Image analysis of the Periodic Acid-Schiff (PAS) stain revealed a significant increase in hepatic glycogen in the OZR compared to the LZR. Although non-significant, the LZR-WB and OZR-WB tended to have a greater amount of glycogen than the LZR-C and OZR-C groups respectively. Regarding the morphology of the aortic tissues, there were no significant differences found due to rodent model or due to diet after evaluating for connective tissue, medial width, number of nuclei, and glycosaminoglycans. The LZR-WB and OZR-WB groups tended to have less medial width, and a lower percentage of glycosaminoglycans compared to the LZR-C and the OZR-C respectively. Additionally, although non-significant, there was a trend for elevated number of nuclei in the OZR-WB group compared to all other groups. In conclusion, consuming wild blueberries has the potential to alter the morphology of hepatic and aortic tissues and confirms that the OZR continues to act as a reliable model of the MetS

Study of 131 nutrition histories

Thesis (M.A.)--Boston University, 1944. This item was digitized by the Internet Archive

Circadian Clocks: Translation Lost

One of the big questions in biological rhythms research is how a stable and precise circa-24 hour oscillation is generated on the molecular level. While increasing complexity seemed to be the key, a recent report suggests that circa-24 hour rhythms can be generated by just four molecules incubated in a test tube