EFFECT OF REGULATION FACTORS ON CHLORAM-PHENICOL DEGRADING BY ELECTRONIC BAEM CHLORAMPHENICOL DEGRADATION IN SHRIMP BY ELECTRONIC BEAM IRRADIATION STUDY OF THE POLYCLONAL ANTIBODY AGAINST CHLORAMPHENICOL ISOZYME ANALYSIS OF MAIZE( Zea mays L.)INBRED LINES AND A F_2 SEGREGATION POPULATION DURING ANTHER CULTURE PROCEDURE Construction of a System for the Stable Expression of Foreign Genes in Dunaliella salina Photosynthetical responses of Gracilaria lemaneiformis to two antibiotics