Effect of operating parameters on performance of ultrafiltration (UF) to fractionate Catfish protein hydrolysate

The effect of pH, ionic strength and feed concentration on performance of ultrafiltration (UF) to fractionate Catfish protein hydrolysate (CFPH) through 5kDa regenerated cellulose (RC) membrane was studied. The highest and lowest permeate flux belonged respectively to pH 9 and isoelectric point (IEP) with flux reduction of 5.75 L/m2.h at pH 9 and 10.98 L/m2.h at pH isoelectric through operating time. Further, by adding the salt, the highest permeate flux and transmission obtained at highest ionic strength of 0.15 M NaCl with 52.96% of transmission (in average). Then, the transmission reached to 54.18% by increasing feed concentration up to 1.5 mg/ml

Accounting students and communication apprehension: a study of Spanish and UK students

Accounting is about measuring and communicating. Accounting bodies and employers have expressed opinions, which have been supported by research results, advocating that greater emphasis is placed on the development of communication skills throughout the education and training of accountants. Consequently, an increasing number of accounting programmes now include communication skills as educational objectives or learning outcomes, and have integrated activities into the curriculum specifically to develop these skills. It is important to recognise that certain factors can severely restrict the development of communication skills; a major factor is communication apprehension. Research suggests that the existence of high levels of communication apprehension will make efforts to improve communication skills ineffective. Previous research findings indicate that accounting students have high levels of communication apprehension. This paper compares and contrasts the levels and profiles of communication apprehension exhibited by accounting students at the (UK University) and those at the (ESP University). The levels of communication apprehension are also compared with those of students from other disciplines at the same institutions. The results confirm the high levels of communication apprehension in European accounting students. There are notable differences between the two countries however in certain underlying factors.</p

Satiety and hunger induced by small and large duodenal loads of isotonic glucose

Hepatic-portal infusions of small or large flucose loads in the rabbit had little or no stimulating effect on postinfusion food intake. However, marked differential changes in appetite were observed when small and large glucose loads were infused into the duodenum. The satiating effect of small glucose loads contrasted sharply with an unusually high increase in food intake triggered by the infusions of larger amounts of glucose into the duodenum. The results are interpreted in terms of a possible involvement of the enteroinsular mechanism in the regulation of food intake. This mechanism is bypassed and its influence on food intake eliminated when glucose is infused directly into the portal circulation. The positive relationship between large amounts of alimentary carbohydrates and overeating is seen as a factor that may actively promote the development of obesity and diabetes mellitus. </jats:p

Obesity-inducing hypothalamic knife cuts: effects on lipolysis and blood insulin levels

The effect of two experimental manipulations designed to mobilize lipids from adipose tissue have been investigated in rats with parasagittal knife cuts in the ventromedial hypothalamus (VMH). Those animals which displayed hyperphagia during the initial 5 days VMH knife cuts were then restricted in food intake to reduce body weights to levels comparable to that of the sham-operated controls. Two weeks following the knife-cut lesions, or sham operations, animals in the first experiment were exposed to the cold for 60 min, and those in the second experiment were injected with 2-deoxy-D-glucose (2-DG). The injections of 2-DG increased the level of glycerol in the control animals but not in the animals with VMH knife cuts. Both groups showed a rise in glucose. Plasma insulin and triglycerides were the same in both groups. Exposure to the cold increased the level of glycerol in both groups. The insulin levels were lower in the corresponding groups with knife cuts. These studies show that VMH knife cuts do not produce hyperinsulinemia in pair-gained rats. </jats:p

Loss of glucagon suppression of feeding after vagotomy in rats.

Infusion of pancreatic glucagon through the hepatic-portal vein decreased short-term food intake in sham-vagotomized but not in subdiaphragmatically vagotomized rats. Measurement of hepatic glycogen storage showed that vagotomized rats maintain a lower glycogen level than control animals over the four fasting periods evaluated. To determine whether the absence of a glucagon effect on feeding in vagotomized rats was the result of the reduced amount of substrate for glycogenolysis, vagotomized rats were not fasted and control animals were food deprived for 8h to produce comparable hepatic glycogen levels. Hepatic-portal infusion of glucagon into these differentially fasted animals suppressed feeding in control rats but not in vagotomized rats. It is concluded that the ineffectiveness of glucagon in suppressing feeding in vagotomized rats is not due to reduced concentration of hepatic glycogen. Instead, it is likely that glucagon induces glycogenolysis, but the glucose, or some other correlate of glycogen breakdown, loses its ability to produce satiety subsequent to vagotomy. </jats:p