Abstract: The invention relates to dehydrated dairy products as well as to a process for preparing these products. The dairy products according to the invention comprise as basic matrial preferably cheese, butter or curd in a combination with highly disperse colloidal silicon dioxide and their water content amounts to 0.3 to 15% by mass. According to the process of the invention, the basic material is mixed with 0.5 to 25% by mass of a highly disperse colloidal silicon dioxide, the mixture is granulated and then dried at a maximum temperature of 30.degree. C. down to a water content of 0.3 to 15% by mass. These products preserved according to the invention maintain their taste, aroma and odor characteristic of the fresh starting substances.

Abstract: The invention relates to a process for the production of propagating material of plants by micropropagation in sterile tissue culture which comprises(a) planting sterile shoot cuttings of plants in solid nutrient medium in a suitable flask, filling up the flask with a suitable liquid nutrient medium optionally containing a growth regulator and growing the shoots in the submersed system; thereafter(b) cutting up into pieces the ramified culture thus obtained which contains a number of lateral buds and shoots, rooting the top-end shoots and planting the same after adaptation, and subjecting the cuttings prepared from the lower and middle parts of the shoot cultures to further cultivations according to step (a);and repeating steps (a) and (b) until the desired number of top-end shoots is reached.