Formation of Copper Sulfide Artifacts During Electrolytic Dissolution of Steel

Single-Cell Analysis Reveals Cxcl14+ Fibroblast Accumulation in Regenerating Diabetic Wounds Treated by Hydrogel-Delivering Carbon Monoxide

“…In the CO@HAG hydrogel system, the thiol group of the HA-SH derivative in the aqueous phage is difficult to interact with the solid phage of Mn 2 [CO] 10 because of steric hindrance. The stability constant for the Ag + -organosulfur complex (such as thiol) is around 10 13 , which is much higher than the constant of 3 × 10 7 for the Mn-S complex . Therefore, when Ag + ions mixed with a Mn 2 [CO] 10 /HA-SH mixture, the cross-links of Ag-S were dominantly formed.…”

“…The stability constant for the Ag + -organosulfur complex (such as thiol) is around 10 13 , 30 which is much higher than the constant of 3 × 10 7 for the Mn-S complex. 31 Therefore, when Ag + ions mixed with a Mn 2 [CO] 10 /HA-SH mixture, the cross-links of Ag-S were dominantly formed. Moreover, Fourier transform infrared spectroscopy (FT-IR) experiments were used to compare (i) HA-SH+ Mn 2 [CO] 10 and HA-SH samples and (ii) CO@HAG and HAG samples.…”

Development of Analysis Method for Sulfide in Steel with Chelating Agent of Copper

“…Kazumi MIZUKAMI, 1,2) * Daisuke ITABASHI, 1) Michihiro AIMOTO 1) and Masayuki NISHIFUJI 1) 1) Advanced Technology Research Laboratories, Nippon Steel Corporation, 20-1 Shintomi, Futtsu-shi, Chiba, 293-8511 Japan.…”

“…Of the particles, the unclear point had been reported about the observation and analysis of copper sulfides (Cu x S). [2][3][4][5][6][7][8][9] Several authors reported that when steels were rapidly cooled from a high temperature of 1 473 to 1 573 K, and observed after the SPEED etching, copper sulfides were found abundantly precipitated. [10][11][12] This temperature range was higher than the precipitation temperature (about 973 K) predicted by thermochemical calculation programs such as FactSage.…”

“…J. Tan and P.C. Pistorius 2) reported that these copper sulfides were formed because MnS stable in the steel matrix becomes unstable and easily decomposable in an aqueous solution. Additionally, because Cu 2 + ion easily forms sulfides in an aqueous solution in the presence of S, it reacts with MnS in a methanol (non-aqueous solvent) electrolyte, which has the characteristics similar to an aqueous solution, resulting in forming artificial sulfides.…”