background: in algeria, date palm is currently confronted to the bayoud disease. biotechnological tools such as protoplasts fusion can appear as an alternative to ensure rapid multiplication and improvement of this species.objectives: callogenesis induction in protoplasts isolated from embryogenic callus of three date palm cultivars.materials and methods: some factors influencing the isolation ...

Experimental studies of fish cutting waste—scales and skin were carried out, their general biochemical composition was studied, a high content collagen established, elastin noted, which accounted for 76–86% the protein mass. Processes hydrolysis secondary raw materials have been developed: scales skin. Technological schemes developed influence conditions thermal, enzymatic, enzymatic-thermal, e...