The objective of our study was to examine the hepatic protective mechanism of Ginkgo biloba extract (GBE) in rats with obstructive jaundice (OJ). Twenty rats underwent bile duct ligation and received daily intraperitoneal injections of either control saline or Ginkgo biloba extract for 14 days. Ten sham-operated rats had their bile duct exposed but not ligated or sectioned. Serum alanine transaminase (ALT) was analyzed for liver function tests and liver damage was further assessed by histologic examination. The levels of endothelin 1 (ET-1) and nitric oxide (NO) in blood and liver homogenate were measured. The serum alanine transaminase was elevated in the bile duct ligation rats (BDL rats); GBE could significantly lower serum transaminase level and ameliorate liver histological damage. ET-1 and NO levels in both plasma and liver tissue were also elevated in common bile duct (CBD)-ligated rats, but this increase was significantly decreased by GBE treatment. Moreover, the degree of liver damage severity positively correlates with high levels of ET-1 and NO. GBE mediated the liver protective effect at least in part by suppressing overproduction of ET-1and NO and restoring a proper balance between ET-1and NO to some extent.
A vehicle security monitoring system is presented in this paper, based on ultralow power microcontroller C8051F340. The monitoring system could monitor vehicle with fireworks in real-time, to warn while the vehicle is in danger, to report to monitoring center and to activate emergency plans. Parameters of temperature, pressure, speed and position could be collected in real-time by system, and data could be transmitted to the host server via CDMA network. The functions of the main controller are described in C language. The editing, debugging and combination of the programs are performed in the integrated software environment-KeilC vision 3. After system test, result shows that the system is reliable, stable and consistent accuracy and the indicator.
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