Cytological Effects of Some New Mutagens on Rice;

The mutagenic effects were studied and the results indicated that all the mutagens could induce the variation of the chromosome structure in rice plant.

Analysis on induced factors of pressure bump occurred in deep mine roadway of Zhaogezhuang Mine;

Based on the discussing of the geological condition of natural environment in Henan Provinvce,the authors have systematically expounded the developmental types,distributing features,induced factors and harmful degrees of main geologic disaster,predicted development trend of geologic disaster,and put forward the corresponding measures of the prevention and control in this paper.

On the basis of studying the geological background of landslide area,plane and profile forms and features,inducing factor,adopting the method of the transmit coefficient,the stability coefficients of landslide at the natural,rainstorm,composed of the loads,et.

Based on the study of engineering geological conditions and basic properties of the landslide,this paper describes the structure and deformation characteristics of the landslide and analyses its causes and main inducing factors.

On the basis of field investigation this paper evaluates forming conditions, inducing factors, harmfulness and developmental trend of the Boamo superlarge landslide And control measures are put forwar