The division of petroleum populations is the basis of studying fluid heterogeneity, reservoir connectivity, reservoir filling history, and so on, so it plays an important role in the research of reservoir geology, especially of reservoir geochemistry.

Eluants used in eluting chromatographic separation of crude oil family compositions are noxious and volatilizable.

Review the concept of "ethnic group" and solutions to conflicts between ethnic groups;

Domestic Nationality and Ethnic group s Studies comment in the last hundred years;

The Five Migrations and Its Influence to the Hui Ethnic Group in the History of the Hui;

There are various concepts of racial group and features of racial groups.

This paper probes into the formation and development the relations of regional racial groups through a field investigation of an immigrating rural community in the light of folk beliefs and historical anthropology.

This article deals with Shenzhen Zhongcheng Stationery Factory,analyses the structure and common features of the racial groups by means of anthropological theory and methodology.

The Study of Democratic Progressive Party s Ethnic Groups Mobilization in Election;

Its not only as a belief throughout the national spirit,but also penetrate into Salar s all aspects of life,and formed their unique cultural identity of ethnic groups.

Taking the Tanxi community for example, the paper describes and analyzes the fusion and disintegration of related ethnic groups.