Objective To explore the predictors of condom-use self-efficacy in Chinese college students according to the extended parallel process model （EPPM）-based integrated model. Methods A total of 3,082 college students w...Objective To explore the predictors of condom-use self-efficacy in Chinese college students according to the extended parallel process model （EPPM）-based integrated model. Methods A total of 3,082 college students were anonymously surveyed through self-administered questionnaires in Guangzhou and Harbin, China. A structural equation model was applied to assess the integrated model. Results Among the participants, 2,387 （46.7%） were male, 2,586 （53.3%） were female, and the average age was 18.6 years. The final integrated model was acceptable. Apart from the direct effect （r = 0.23）, perceived severity had two indirect effects on condom-use self-efficacy through the attitude to HIV education （r = 0.40） and intention to engage in premarital sex （r = -0.16）, respectively. However, the perceived susceptibility mediated through the intention to engage in premarital sex （intent-to-premarital-sex） had a poor indirect impact on condom-use self-efficacy （total effect was -0.06）. Furthermore, attitude toward HIV health education （r = 0.49） and intent-to-premarital-sex （r = -0.32） had a strong direct effect on condom-use self-efficacy. In addition, male students perceived higher susceptibility, stronger intent-to-premarital-sex, and lower condom-use self-efficacy than female students. Conclusion The integrated model may be used to assess the determinants of condom-use self-efficacy among Chinese college students. Future research should focus on raising the severity perception, HIV-risk-reduction motivation, and the premarital abstinence intention among college students. Furthermore, considering the gender differences observed in the present survey, single-sex HIV education is required in school-based HIV/sex intervention.展开更多
The effect of Cl- ion on the anodic iron dissolution in H2SO4 solutions containing H2S has been studied by using electrochemical polarization curve measurements. The competitive adsorption for Cl- and HS- ions at an a...The effect of Cl- ion on the anodic iron dissolution in H2SO4 solutions containing H2S has been studied by using electrochemical polarization curve measurements. The competitive adsorption for Cl- and HS- ions at an anodic potential has been calculated using the CNDO/2method. The results show that a ceftain concentration of the Cl- ion can be adsorbed steadily and inhibit the anodic reaction of iron catalyzed by HS-. However, when the Cl- ion reaches the saturation adsorption, it begins to promote the anodic reaction of iron due tO the increased negative charge of iron atoms.展开更多
文摘Objective To explore the predictors of condom-use self-efficacy in Chinese college students according to the extended parallel process model （EPPM）-based integrated model. Methods A total of 3,082 college students were anonymously surveyed through self-administered questionnaires in Guangzhou and Harbin, China. A structural equation model was applied to assess the integrated model. Results Among the participants, 2,387 （46.7%） were male, 2,586 （53.3%） were female, and the average age was 18.6 years. The final integrated model was acceptable. Apart from the direct effect （r = 0.23）, perceived severity had two indirect effects on condom-use self-efficacy through the attitude to HIV education （r = 0.40） and intention to engage in premarital sex （r = -0.16）, respectively. However, the perceived susceptibility mediated through the intention to engage in premarital sex （intent-to-premarital-sex） had a poor indirect impact on condom-use self-efficacy （total effect was -0.06）. Furthermore, attitude toward HIV health education （r = 0.49） and intent-to-premarital-sex （r = -0.32） had a strong direct effect on condom-use self-efficacy. In addition, male students perceived higher susceptibility, stronger intent-to-premarital-sex, and lower condom-use self-efficacy than female students. Conclusion The integrated model may be used to assess the determinants of condom-use self-efficacy among Chinese college students. Future research should focus on raising the severity perception, HIV-risk-reduction motivation, and the premarital abstinence intention among college students. Furthermore, considering the gender differences observed in the present survey, single-sex HIV education is required in school-based HIV/sex intervention.
文摘The effect of Cl- ion on the anodic iron dissolution in H2SO4 solutions containing H2S has been studied by using electrochemical polarization curve measurements. The competitive adsorption for Cl- and HS- ions at an anodic potential has been calculated using the CNDO/2method. The results show that a ceftain concentration of the Cl- ion can be adsorbed steadily and inhibit the anodic reaction of iron catalyzed by HS-. However, when the Cl- ion reaches the saturation adsorption, it begins to promote the anodic reaction of iron due tO the increased negative charge of iron atoms.
