[Analysis of mortality rate of stomach cancer and its trend in twenty years in China].

Objective: To analyze and predict the trend in mortality rate of stomach cancer in twenty years in China.

Methods: Stomach cancer mortality data collected from the China national survey over the period 1970s - 1990s for the cause of death were analyzed.

Results: The adjusted mortality rate of stomach cancer in 1990s increased by 11.

Regional variations in mortality rates of pancreatic cancer in China: results from 1990-1992 national mortality survey.

Aim: To examine the regional variations in mortality rates of pancreatic cancer in China.

Methods: Aggregated mortality data of pancreatic cancer were extracted from the 1990-1992 national death of all causes and its mortality survey in China. Age specific and standardized mortality rates were calculated at both national and provincial levels with selected characteristics including sex and residence status.

[Changes of mortality rate for cervical cancer during 1970's and 1990's periods in China].

Objective: To describe the distribution changes of the mortality rate for cervical cancer in China between the 1970's and 1990's and provide the scientific evidence for the prevention and control strategies for cervical cancer campaign in China between next century.

Methods: Data from two National Surveys for the Causes of Death in 1970's and 1990's in China. The crude and adjusted mortality rates for the cervical cancer and the distributions based on age and area were calculated and described.

A convenient method for the synthesis of amine-terminated poly(ethylene oxide) and poly(epsilon-caprolactone).

A convenient synthetic route to prepare amine-terminated poly(ethylene oxide) (PEO) and poly(epsilon-caprolactone) (PCL) was described. The strategy involved two-step reactions, the condensation of hydroxyl-terminated PEO and PCL with N-benzyloxycarbonyl amino acid followed by the catalytic hydrogenation under mild conditions. NMR and GPC measurements indicated that the reactions proceeded nearly quantitatively.