Showing papers in "Leather and Chemicals in 2004"
Journal Article•
TL;DR: In this article, the kinds of multifunctional leather fatliquoring agents were introduced and the recent developments in these research fields were summarized, and it was pointed out that the future target of research work and production are to develop fat liquoring agent with high quality, specific function, and multi-functional products on the basis of green chemicals.
Abstract: In this paper the kinds of multifunctional leather fatliquoring agents were introduced The recent developments in these research fields were summarized It is pointed out that the future target of research work and production are to develop fatliquoring agents with high quality, specific function, and multifunctional products on the basis of green chemicals
2 citations
Journal Article•
TL;DR: Starting with the practical purpose of database management system, this article provides a brief description including the security threatening, security purpose, security requirement and final normal security tactics.
Abstract: Starting with the practical purpose of database management system,this article provides a brief description including the security threatening,security purpose, security requirement and final normal security tactics.It shows the origin and process of database management system from the security of database management system.The security question takes up the leading status of information systems because the centralized mamagement of DBMS,how to ensure and strengthen the security of DBMS and the secrecy of DBMS become indispensable.
1 citations
Journal Article•
TL;DR: In this paper, the starch-grafted copolymer of high molecular, which can be quickly soluble in water, was manufactured by using cyclohexane as a continuous phase, Span-20 as a dispersant and K 2S 2O 8 as an initiator.
Abstract: The starch-grafted copolymer of high molecular, which can be quickly soluble in water, was manufactured by using cyclohexane as a continuous phase, Span-20 as a dispersant and K 2S 2O 8 as an initiator. The effects of the amounts of initiator, dispersant and monomer, the reacting time and the temperature on the monomer conversion and starch-grafting ratios were discussed. When the concentration of K 2S 2O 8, the concentration of EDTAs, the amount of the dispersant Span-20 , the reacting temperature , the reacting time, the grafted ratio of starch and the convertion rate are 1.2 ×10 -2mol/ L, 1.2 ×10 -2mol/ L, 3%, 60 ℃, 3 hours, 146% and 90% separately, the molecular weight of monomer can reach 15 million.
1 citations
Journal Article•
TL;DR: The characteristics of tannery wastewater are the high level of contamination of organic substances and poisonous elements like Cr and S and the main new technologies are physical and chem-physical and biological treatment as discussed by the authors.
Abstract: The characteristics of tannery wastewater are the high level of contamination of organic substances and poisonous elements like Cr and S. The development of study on treatment of tannery wastewater is introduced and commented in this essay. It consists of a few aspects including the source of ammonia in tannery wastewater and the available choices of process for eliminating the ammonia. The main new technologies are physical and chem-physical and biological treatment.
1 citations
Journal Article•
TL;DR: The studies of reusing chrome shavings are described in details in retanning, stuffing,iling and finishing.
Abstract: The kinds and development of chrome shavings are reviewed in this paper. The studies of reusing chrome shavings are described in details in retanning,stuffing,oiling and finishing.
1 citations