Efficacy of DNA extraction and parification from difficulty mixed stain samples using differential digestion and silica purification technology;

Therefore, it is meaningful, both in theory and practice, toresearch its difficulty for cognizing invasion and applying law.

In forensic authentication of biological evidence, for mixture stains, usually the Chelex extraction method was used to extract DNA and STR loci were typed after PCR amplification.

Interpretation of DNA profiles for mixed stains;

objective To detect the technique of PCR -STR typing examination of mixed stain in sexal crimes.

Conclusion The Differential Extraction Kit can be applied in DNA extraction for mixed stain from forensic sexual assault samples.

Preparation of Homogeneous Al-Bi Immiscible Alloy by a Cooling Slope Method;

Prepare the Homogeneous Al Based Immiscible Alloys by a Cooling Slope Method;

The directional solidification experiment has been carried out for the Al-Bi based immiscible alloys.

Considering the common action of minority phase spheres nucleation,diffusion growth,spatial movement and interaction between solidification interface and minority phase spheres,a model was developed to describe the kinetics of metastable liquid-liquid phase transformation and microstructure evolution in the metastable immiscible alloys with different volume fractions of minority phase spheres.