The failure,rupture and collapse of mining induced surrounding strata are a representative process in which the boundaries of dynamic system are variable.

The detection of active lactic acid bacteria was an important way to judge the quality of yoghurt beverage,and the colony characteristics and morphology was the key for colony counting.

Based on domestics and foreign strains belonging to these three species, a comparative study was conducted to evaluate the effect of temperature, pH, light duration and medium on mycelial growth rate and colony characteristics.

A study on the comparision of community characteristic between different age Metasequoia glyptostroboides plantations;

The protect countermeasure of wetland based on winter migrant bird s community characteristic;

Study on Achnatherum splendens community characteristics and species diversity around Qinghai Lake;

The community characteristics of soil protozoa with pollution of compound sewage from Moguhu;

Comparisons among soil collembola community characteristics in relation to different vegetation restoration treatments in the moderate degraded grasslands in the Songnen Plain of Northeast China;

Studies on community characteristics of Pinus tabulaeformis and Quercus mongolica forest and its species diversity of Dongling district in Shenyang;

Plant-diversity and Community Structure of Primordial Wetland in Hilly Region in Northeastern China;

Then the community structure of these 2 species was investigated.