The threshold stress, σc, for sulfide stress corrosion cracking (SCC) of seven pipeline steels and five other steels, the critical stress, Sc, for seven pipeline steels and two drill rod steels with various strengths...The threshold stress, σc, for sulfide stress corrosion cracking (SCC) of seven pipeline steels and five other steels, the critical stress, Sc, for seven pipeline steels and two drill rod steels with various strengths and the susceptibility to SCC, IRA or σf(SCC)/σf, for four pipeline steels, two drill rod steels and five other steels were measured. The results showed that there are no definite relationships among σc, Sc and IRA or σf(SCC)/σf.The threshold stress for hydrogen induced cracking (HlC) during charging with loading in the H2S04 solution, σc(H), decreased linearly with logarithm of the concentration of diffusible hydrogen c0, i.e., σc(H)=A-B Inco for four pipeline steels. σc(H) obtained with a special cathodic current ic, which was corresponding to the diffusible hydrogen concentration during immersing in the H2S solution, were consistent with /c for sulfide SCC for four pipeline steels. Therefore, σc for sulfide SCC can be measured using dynamically charging in the H2SO4 solution with the special cathodic current ic.展开更多
Precisely quantifying the strength of the proximal femur and accurately assessing hip fracture risk would enable those at high risk to be identified so that preventive interventions could be taken.Development of bette...Precisely quantifying the strength of the proximal femur and accurately assessing hip fracture risk would enable those at high risk to be identified so that preventive interventions could be taken.Development of better measures of femoral strength using the clinically展开更多
A series of 3-substituted quinazolinones,2-substituted quinoxalines and 2-substituted benzopyrans were synthesized and evaluated for their antifungal activity in vitro.The new compounds revealed excellent in vitro ant...A series of 3-substituted quinazolinones,2-substituted quinoxalines and 2-substituted benzopyrans were synthesized and evaluated for their antifungal activity in vitro.The new compounds revealed excellent in vitro antifungal activity with broad spectrum.The structure-activity relationships（SARs） of the derivatives were analyzed.Compound 9A2 exhibits better antifungal activity against 5 tested fungi in vitro than fluconazole,especially against Trichophyton rubrum and Microsporum gypseum.This study provides a series of novel lead compounds for the development of non-azole antifungal agents.展开更多
基金This project was supported by the NNSFC of China! (No.19891180, 59725104, 59895150) the Corporation of iron and Steel Baosha
文摘The threshold stress, σc, for sulfide stress corrosion cracking (SCC) of seven pipeline steels and five other steels, the critical stress, Sc, for seven pipeline steels and two drill rod steels with various strengths and the susceptibility to SCC, IRA or σf(SCC)/σf, for four pipeline steels, two drill rod steels and five other steels were measured. The results showed that there are no definite relationships among σc, Sc and IRA or σf(SCC)/σf.The threshold stress for hydrogen induced cracking (HlC) during charging with loading in the H2S04 solution, σc(H), decreased linearly with logarithm of the concentration of diffusible hydrogen c0, i.e., σc(H)=A-B Inco for four pipeline steels. σc(H) obtained with a special cathodic current ic, which was corresponding to the diffusible hydrogen concentration during immersing in the H2S solution, were consistent with /c for sulfide SCC for four pipeline steels. Therefore, σc for sulfide SCC can be measured using dynamically charging in the H2SO4 solution with the special cathodic current ic.
基金supported by The HongKong Polytechnic University Research Grants(No.1-BB81)grants from National Natural Science Foundation of China,Nos.10872078 and 10832012
文摘Precisely quantifying the strength of the proximal femur and accurately assessing hip fracture risk would enable those at high risk to be identified so that preventive interventions could be taken.Development of better measures of femoral strength using the clinically
基金supported by the Shandong Natural Science Foundation(No.ZR2012HQ026)the Foundation of Sichuan Provincial Health Department(No.110480)
文摘A series of 3-substituted quinazolinones,2-substituted quinoxalines and 2-substituted benzopyrans were synthesized and evaluated for their antifungal activity in vitro.The new compounds revealed excellent in vitro antifungal activity with broad spectrum.The structure-activity relationships（SARs） of the derivatives were analyzed.Compound 9A2 exhibits better antifungal activity against 5 tested fungi in vitro than fluconazole,especially against Trichophyton rubrum and Microsporum gypseum.This study provides a series of novel lead compounds for the development of non-azole antifungal agents.
