Effects of fatty acid oxidation on glucose utilization by isolated hepatocytes

We have studied the inhibitory action of long- and short-chain fatty acids on hepatic glucose utilization in hepatocytes isolated from fasted rats. The rates of hepatic glucose phosphorylation and glycolysis were determined from the tritiated products of [2-3H] and [6-3H]glucose metabolism, respectively. The difference between these was taken as an estimate of the 'cycling' between glucose and glucose-6-phosphate. In the presence of 40 mM glucose this cycling was estimated at 0.68 mumol/min/g wet wt. Glucose phosphorylation was unaffected during palmitate and hexanoate oxidation to ketone bodies but glycolysis was inhibited. The rate of glucose cycling was increased during this phase to 1.25 mumol/min/g. Following the complete metabolism of the fatty acids, glycolysis was reinstated and cycling rates returned to control levels. Hepatic glucose cycling appears to be an important component of the glucose/fatty acid cycle.     

Review: Modified Atmosphere Packaging and its effects on the microbiological quality and safety of produce

Modified Atmosphere Packaging and related technologies are increasingly used to extend shelf-life of fresh produce. This paper reviews the effect of such technology on the spoilage microbiological flora and food-borne pathogens which may be present in produce and also on the organoleptic properties of the product.     

Radiation demineralised bone enhanced osteoinductive capacity after transplantation

Using a mediating alkyne gas during the radiation treatment prevents the degradation of natural and synthetic polysaccharides and proteins. The product has higher viscosity and is more elastic than the original material and, therefore, gives enhanced functionality. Protein, within demineralised bone, too can be modified to give enhanced osteoinductive capacity after transplantation. Thus new functionalities can be achieved from the new products produced in food and medical products.     

如何降低蓝牙系统的成本

蓝牙工业界有一个雄心勃勃的计划，要将整个蓝牙接收器/发射器的价格控制在仅仅5美元，其中包括了基于DSP的子系统及相应的ROM和RAM。而这要等到蓝牙无线技术有了相当大的市场规模，并且通过大规模的投产来产生经济效益之后，才有可能成为现实。在这场角逐中，某些制造商可能会抢占先机。例如，到2001年6月，CSR公司已经生产了超过1百万块BlueCore单片蓝牙产品，目前市场上带蓝牙功能的所有终端用户产品中，48%都采用了这款芯片。本文介绍了CSR所采用的一些产品设计方法，以尽可能降低蓝牙产品的成本，同时还介绍了可能影响蓝牙产品…