Abstract: A method for synthesizing high-purity ultrafine ZrC—SiC composite powder is provided. The high-purity ultrafine ZrC—SiC composite powder is prepared by utilizing zirconium silicate only or zirconium silicate with one or both of zirconium oxide or silica sol as a zirconium source and a silicon source material, utilizing sucrose or glucose as a carbon source material, and utilizing acrylamide monomer and N,N?-methylene diacrylamide cross-linking agent as a gel material.

Abstract: The embodiments of the present invention disclose a method for synthesizing ceramic composite powder and ceramic composite powder, pertaining to the technical field of inorganic non-metallic materials. Among them, the method includes preparing an aqueous slurry of ceramic raw materials, the aqueous slurry including ceramic raw material, water and low polymerization degree organometallic copolymer, the ceramic raw material including at least two components; adding a crosslinking coagulant into the aqueous slurry to obtain a gel; dehydrating and drying the gel to obtain the dried gel; heating the dried gel to the synthesizing temperature of the ceramic composite powder and conducting the heat preservation to obtain ceramic composite powder or ceramic composite base powder; conducting secondary doping on ceramic composite base powder to obtain the ceramic composite powder.

Abstract: A method for synthesizing high-purity ultrafine ZrC—SiC composite powder is provided. The high-purity ultrafine ZrC—SiC composite powder is prepared by utilizing zirconium silicate only or zirconium silicate with one or both of zirconium oxide or silica sol as a zirconium source and a silicon source material, utilizing sucrose or glucose as a carbon source material, and utilizing acrylamide monomer and N,N?-methylene diacrylamide cross-linking agent as a gel material.

Abstract: The embodiments of the present invention disclose a method for synthesizing ceramic composite powder and ceramic composite powder, pertaining to the technical field of inorganic non-metallic materials. Among them, the method includes preparing an aqueous slurry of ceramic raw materials, the aqueous slurry including ceramic raw material, water and low polymerization degree organometallic copolymer, the ceramic raw material including at least two components; adding a crosslinking coagulant into the aqueous slurry to obtain a gel; dehydrating and drying the gel to obtain the dried gel; heating the dried gel to the synthesizing temperature of the ceramic composite powder and conducting the heat preservation to obtain ceramic composite powder or ceramic composite base powder; conducting secondary doping on ceramic composite base powder to obtain the ceramic composite powder.

Abstract: Disclosed is a method for identification of key amino acids in plant proteins critical in generating allergenic activity through mapping the epitope(s) harboring human IgE binding activity. The identified epitope(s) are then modified by amino acid substitution preferably by alanine substitution, for reduced or negative IgE-binding activity. A plant gene expression system comprising a DNA construct placed operably under the control of a promoter sequence that confers seed-specific expression is also disclosed for the expression of the modified proteins. The Brazil nut 2S sulfur-rich protein was exemplified. The method disclosed herein is particularly useful for the production of dietary proteins with improved nutritional quality and reduced or negative allergenicity for human and animal consumption through genetic engineering.

Abstract: Disclosed is a method for identification of key amino acids in plant proteins critical in generating allergenic activity through mapping the epitope(s) harboring human IgE binding activity. The identified epitope (s) are then modified by amino acid substitution preferably by alanine substitution, for reduced or negative IgE-binding activity. A plant gene expression system comprising a DNA construct placed operably under the control of a promoter sequence that confers seed-specific expression is also disclosed for the expression of the modified proteins. The Brazil nut 2S sulfur-rich protein was exemplified. The method disclosed herein is particularly useful for the production of dietary proteins with improved nutritional quality and reduced or negative allergenicity for human and animal consumption through genetic engineering.