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39 results on '"Liu, Yushan"'

7. Hydrogen Evolution Reaction: Coupling of Ru and O‐Vacancy on 2D Mo‐Based Electrocatalyst Via a Solid‐Phase Interface Reaction Strategy for Hydrogen Evolution Reaction (Adv. Energy Mater. 26/2021)

Author

Cai, Jialin, primary, Ding, Jie, additional, Wei, Donghui, additional, Xie, Xin, additional, Li, Baojun, additional, Lu, Siyu, additional, Zhang, Jianmin, additional, Liu, Yushan, additional, Cai, Qiang, additional, and Zang, Shuangquan, additional

Published
2021
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21. Experimental Study on the Leaching of Gold from Greenstone1

Author

Zhang Guilan, Tian Jun, and Liu Yushan

Subjects
inorganic chemicals, Mineral redox buffer, Inorganic chemistry, technology, industry, and agriculture, medicine, Mineralogy, Geology, Leaching (metallurgy), Leaching rate, complex mixtures, Chloride, medicine.drug
Abstract

Experiments were conducted on the leaching of gold from greenstone by chloride solution under the temperature of 200-550°C and the pressure of 60 MPa. During part of the experiments, the oxygen fugacity was controlled. The results show that the leaching rate of gold is related to temperature, composition of the solution, pH and oxygen fugacity. In the experiment with oxidative acidic solution, the leaching rate was up to 50% or more. It is known that the leaching of gold is restricted by the reaction in which the gold is dissolved from the rock to form gold chloride complex. Therefore, the authors hold that the acidic chloride solution derived from granite magma has caused the remobilization-migration of gold from greenstone and its enrichment into ore.

Published
2009

22. Quartz-Ferberite Oxygen Isotope Geothermometer and Its Geological Applications

Author

Ding Tiping, Liu Zhijian, Zhang Guilan, Liu Yushan, Li Jincheng, and Wan Defang

Subjects
Isotope, chemistry.chemical_element, Mineralogy, Geology, Fractionation, Tungsten, Atmospheric temperature range, engineering.material, Isotopes of oxygen, chemistry, engineering, Ferberite, Inclusion (mineral), Quartz
Abstract

Experiments for oxygen isotope exchange between ferberite and water were carried out and the following equation on oxygen isotope fractionation between ferberite and water against temperature was obtained: 10001nα FeWO4 −H2O = 1.04 × 106T −2 − 2.5 Combining this equation with the equation of Clayton et al. (1972) on oxygen isotope fractionation between quartz and water, an equation on oxygen isotope fractionation between quartz and ferberite was obtained: 10001nαSiO2 − FeWO4 = 2.34 × 106T−2 − 0.4 The Bigeleison-Mayer function method was used to calculate the oxygen isotope fractionation between quartz and ferberite. The theoretical curve obtained agrees with the experimental calibration results quite well in the temperature range of study. The above calibrated equation has been used in 5 world famous tungsten deposits to determine their temperatures of formation. The results show that the temperature range for an idividual deposit determined by this geothermometer agrees with those obtained from fluid inclusion determination and other isotope geothermometers.

Published
2009

35. Reply

Author

Wang, Quanxing, primary, Liu, Yushan, additional, and Li, Xiao-Kang, additional

Published
2006
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39. Cerebral blood flow dynamic in foetuses with hypoplastic left heart syndrome: Incremental value of the first segment of the anterior cerebral artery over the middle cerebral artery?

Author

Liu Y, Zeng S, Tan Y, Zhou J, and Zhao B

Subjects
Adult, Blood Flow Velocity, Case-Control Studies, Female, Humans, Hypoplastic Left Heart Syndrome physiopathology, Infant, Newborn, Pregnancy, Pulsatile Flow, Ultrasonography, Prenatal, Young Adult, Anterior Cerebral Artery diagnostic imaging, Cerebrovascular Circulation, Hypoplastic Left Heart Syndrome diagnostic imaging, Middle Cerebral Artery diagnostic imaging, Ultrasonography, Doppler
Abstract

Objective: To investigate the blood flow Doppler parameters of the anterior cerebral artery (ACA) in foetuses with hypoplastic left heart syndrome (HLHS)., Methods: Doppler parameters (peak systolic velocity [PSV], end-diastolic velocity [EDV], time-averaged maximum velocity [TAMXV] and pulsatility index [PI]) and biometric parameters were measured in two anatomical segments of the ACA (S1 and S2) and in the middle cerebral artery (MCA) in 35 HLHS foetuses and 73 gestational age-matched normal foetuses. Correlations between the cerebral artery PIs and head circumference (HC) were assessed., Results: Both EDV and TAMXV of the ACA and MCA in the HLHS group were significantly higher than in the normal group (P < .05). The PI of the ACA and MCA in the HLHS group were significantly lower than in the normal group (P < .05). ACAS1PI and ACAS2PI in the HLHS foetuses with retrograde blood flow in the aortic isthmus (AoI) were significantly lower than those of HLHS foetuses without retrograde blood flow in the AoI (P < .05). ACAS2PI was significantly lower than ACAS1PI in the HLHS foetuses with retrograde blood flow in the AoI (P = .047). The abnormal rates of ACAS1 and ACAS2 were significantly higher than that of the MCA (P < .05) in the HLHS group. The HC and biparietal diameter were significantly lower in the HLHS group than in the control group (P < .05). HC was correlated with the PIs of ACAS1, ACAS2 and the MCA in the HLHS group (P < .05)., Conclusion: A redistribution of foetal cerebral blood flow appeared in HLHS, and the measurement of ACA PI might provide early information on brain hypoxia., (© 2019 John Wiley & Sons, Ltd.)

Published
2020
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