Modification Effect of Rare Earth Rich In Ce On Al-Si Alloy;

Experiment showed that the addition of a small quatity of Ho has the significant effect of modification on as-cast Al-25 wt％ Si alloy.

On the other hand,under favorable structural condition and metamorphic process,copper mineralized zone is further enriched,which has an operation significance in looking for ore-body around the mine and extending the service life of the mine.

According to distinctive minerals for metamorphic process, it can be divided into three zones: biotite zone, garnet zone, staurolite zone.

Study on the alteration of Dongping gold orefield, Hebei;

The main alterations are as follows: muscovitization, dolomitization, biotitization, sericitization, chloritization,tourmalinization, greisenization and so on.

Based on diagnostic spectral characteristics of the ions included in altered minerals and field theory,the authors believe that the alteration occurred in a rock body particle and is closely related to the temperature,pressure and surrounding structure of hydrothermal deposits,and has the field characteristics.

In this paper,by analyzing the ethanol produced by Saccharomyces cerevisia irradiated by He-Ne laser from molasses in Gas Chromatography,we have illustrated the results that He-Ne laser can give rise to an obvious biological stimulating effect and an available mutagenesis effect.