!Background: To explore whether endometrial receptivity is determined by osteopontin (OPN) and integrin αvβ3 expression in women with elevated serum progesterone (P) and/or oestradiol (E 2 ) who are undergoing in vitro fertilisation (IVF). Methods: According to serum hormone levels on the day of HCG administration, 33 infertile women were divided into 3 groups: the high E 2 , high P, and high E 2 and P groups. The control group included 11 fertile, healthy women. Endometrial biopsy was performed on ovulation day + 7 to + 8 for all study participants, and the mRNA and protein expression levels of OPN and integrin αvβ3 were analyzed. Result: No statistically significant differences regarding OPN and integrin αvβ3 expression were found between infertile patients in the high P, high E 2 , high E 2 and P and control groups. There was no significant correlation between OPN and integrin αvβ3 staining intensity during the implantation window biopsy in any of the groups studied. Conclusion: Endometrial OPN and integrant αvβ3 expression/co-expression is not impaired during the window of implantation in patients with high P, high E 2 , or high E 2 and P levels. The clinical value of assessing endometrial receptivity with OPN and integrin αvβ3 seems to be uncertain.
A novel process of chlorinating roasting followed by chlorinating leaching to extract platinum and gold from copper anode slimes was proposed in this research. Results of thermodynamic analysis and experimental research showed that the platinum was chlorinated into PtCl2 while the gold existed in the form of metallic Au during the roasting process. With the copper anode slime being directly leached using a traditional process, the Pt recovery rate was low and came to 80.72%. After the roasting process with sodium chloride and concentrated sulfuric acid in oxygen atmosphere, the recovery rate of Pt increased to a value around 95%. Moreover, with excessive addition of concentrated sulfuric acid, more H2O (g) was generated and the formation of Cl2 (g) decreased due to the transition from HCl (g) and Cl2 (g), as a result of which the Pt recovery rate decreased. In addition, this chlorinating roasting had little effect on the Au recovery due to its difficulty to be chlorinated.
The electrochemical behavior of the aluminum bronze in simulated electrolytes like those used in the industrial copper electrolysis process was investigated. Conventional electrochemical techniques including polarization techniques and electrochemical impedance spectroscopy were used. The alloy was found to be easier dissolved when the CuSO 4 -H 2 SO 4 electrolytes contained 160 g L −1 sulfuric acid. A higher sulfuric acid concentration led to increase of polarization resistance and electrolyte resistance, and further caused the decrease of corrosion current density. The activation energy of the dissolution process was found to be 27 kJ mol −1 assigning a diffusion controlled reaction. The impedance measurements and impedance data fitting to equivalent circuit models showed that the passive film formation proceeded via a dissolution/precipitation mechanism under open circuit condition.
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