Yamei Zhao

Xi'an Polytechnic University

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Jing Yang

Xi'an Polytechnic University

Ruihua Mu

Xi'an Polytechnic University

Xiaoqiang Liang

Xi'an Polytechnic University

Chang-Zheng Zheng

Xi'an Polytechnic University

Mengdan Huo

Xi'an Polytechnic University

Haiyun Hou

Xi'an Polytechnic University

Hongji Li

Tianjin University of Technology

Chengan Wan

China Academy of Space Technology

Yingming Guo

Xi'an Polytechnic University

Xiao Hu

Shanxi Medical University

Cooperative Institutions

Xi'an Polytechnic University

Chinese Academy of Sciences

Northwestern Polytechnical University

Northwest University

Nanjing Medical University

Ministry of Education of the People's Republic of China

Chinese Academy of Medical Sciences & Peking Union Medical College

Sichuan University

Shanghai Jiao Tong University

Jilin University

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Surface topography and tribological behavior of anodic oxidation films on an Al–Li alloy in flooded and starved ionic liquids

Wear (2022)

Hui Zhi Feiyan Yuwen Yanan Qiao Yamei Zhao Chunxia Wang

Dimple

Scratch

Texture (cosmology)

10.1016/j.wear.2022.204280

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Citations (7)

Preparation, properties and drug controlled release mechanism of pH/salt dual-sensitive poly(ether-based imidazoles ionic liquid) gel

Xibei Gongye Daxue Xuebao/Journal of Northwestern Polytechnical University (2022)

Yamei Zhao Xingyue LIU Mengdan Huo Zecheng LI Jing Yang

Using N-vinylimidazole as the reactant and introducing different ether-based side chains pH/salt dual-sensitive poly(imidazole ionic liquid) gel (P[C n OC 2 vim]Cl, n =1, 2, 3) was designed and synthesized. The structure characteristic of the gel was determined by IR spectra and SEM. The swelling ratio of gel under different conditions was investigated, including releasing property for ciprofloxacin (CIP) and berberine (Ber). The results showed that P[C n OC 2 vim]Cl( n =1, 2, 3) gel exhibits typical pH-sensitivity and salt-sensitivity. Its swelling ratio increased first and then decreased, and reached the maximum when the value of pH was 7.4; the swelling rate is smaller under the higher concentration of the NaCl. Furthermore, P[COC 2 vim]Cl gel with the short ether chain has the highest release rate of CIP and Ber at pH=7.4, the release behavior is in accord with the first-order kinetic equation. With the increase of the side chain of ether group, the cumulative release rate of P[C n OC 2 vim]Cl( n =2, 3) gel to CIP and Ber decreased obviously, and the behavior comforts to Higuchi kinetic equation. The results suggest that P[C n OC 2 vim]Cl( n =1, 2, 3) gel is the pH/salt dual-sensitive potential carrier for controlled drug release.

Imidazole

Side chain

10.1051/jnwpu/20224010222

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Acid-catalysed Al₂O₃ sol and its gel material: influence of HNO₃ content and stability

Integrated ferroelectrics (2019)

Jing Yang Rui Ma Hongji Li Yamei Zhao Yingming Guo

A series of Al2O3 sols were prepared by HNO3 catalysis of aluminum isopropoxide (AIP), using different molar ratios of HNO3/AIP (nH). The changes in sol densities, viscosities, refractive indices, stability and particle sizes were reported. Derived properties such as Gibbs energies (ΔG*) and the reaction rate constant (k) have been calculated from the experimental density and viscosity data. The phase-chemical structures of Al2O3 materials were characterized using Fourier transform infrared (FTIR) and X-ray diffraction (XRD) measurement. The results show that, when the molar ratio of HNO3/AIP is 0.25, the prepared Al2O3 sol was transparent, uniform and stable, and the sol average particle size gets the minimum. The chemical structure of the non-calcined Al2O3 gel material is dominated by Al–O–H and Al–O bonds. After calcination at 350 °C, the Al–O–H bond will break and is transformed into Al–O bonds, and the phase structure is changed from γ-AlOOH to γ-Al2O3.

Particle (ecology)

10.1080/10584587.2019.1592634

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Citations (1)

Study on structure and seperation properties of polysulfone membranes using ionic liquids as new structure-controlled additives

International Symposium on Water Resource and Environmental Protection (2011)

Yamei Zhao Changzheng Zhang Dapeng Li

Introducing ionic liquids as new structure-controlled additives, Polysulfone (PSf) membranes were prepared by the wet-phase-inversion using 1-(n-Octyl)-3-Methyl limidazolium Hexfluorophosphate [C ₈ mim][PF ₆ ] or 1-hexadecyl-3-methylimidazolium thiocyanate [C ₁₆ mim][SCN] into the casting solution (PSF/NMP). Scanning electron microscope was utilized to visualize cross-sections and surfaces of the membranes to gain more better understanding the influence of different ionic liquids on the structure and seperation properties of the membrane. With increase of concentration of ionic liquid [C ₁₆ mim][SCN] in casting solutions, the structures of the membranes changed from asymmetric finger pores to the spongy-finger-macrovoid structure of the pores. However, With increase of concentration of ionic liquid [C ₈ mim][PF ₆ ] in casting solutions, the structures of the membranes changed from asymmetric finger pores, lengthened macroporous pores, to the close macrovoid pores. Fininally, permeation properties of the membranes was investigated. The result indicated that at the 4:76 ratio of [C ₁₆ mim][SCN]/NMP, the retention rate and solution flux of the prepared membrane are 97.1% for PEG10000 and 48.7 L· h ^-1 · m ^-2 . At the 4:76 ratio of [C ₈ mim][PF ₆ ]/NMP in the polymer solution, the retention rate of the membrane is 92.3% for PEG10000 and solution flux is 33.7 L· h ^-1 · m ^-2 . Meanwhile, the two ionic liquids were used as plasticizers, according the thermal properties of the membranes.

Polysulfone

10.1109/iswrep.2011.5893550

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Citations (4)

Impact of permissive hypercapnia on regional cerebral oxygen saturation and postoperative cognitive function in patients undergoing cardiac valve replacement

Annals of Palliative Medicine (2020)

Longchang Zhu Hongwei Shi Cheng Zhu Hanyu Liu Zhonghong Su

Cardiac valve replacement (CVR) is currently the main surgical treatment for patients with valvular heart diseases (VHD). Postoperative cognitive dysfunction (POCD) is one of the most serious complications of cardiac surgery. Permissive hypercapnia (PHC), an important lung-protective ventilation strategy, has protective effects on vital organs, including the heart, lungs, and central nervous system (CNS). The main objective of this study is to assess the effect of the PHC ventilation strategy on rSO2 and postoperative cognitive function in patients undergoing CVR.A total of 66 patients undergoing CVR were included and randomly divided into the PHC ventilation group (Group H, n=33) and conventional ventilation group (Group C, n=33). Patients of both groups were subjected to conventional ventilation before cardiopulmonary bypass (CPB). patients in Group H were subjected to the PHC ventilation strategy to keep the partial pressure of carbon dioxide (PaCO2) at 46-60 mmHg.(I) Group H had a lower HR at T0 and T1 (P<0.05) and higher CO at T3 and T4 (P<0.05) than Group C. (II) Group H had higher rSO2 at T4 (P<0.05), lower pH and lactate (Lac) at T4 (P<0.05), higher PaCO2 at T3 and T4 (P<0.05), and lower PaO2 at T3 and T4 (P<0.05). (III) Compared to 1 d before surgery, the MMSE scores of both groups were lower 24 h after surgery (P<0.05).PHC can increase the rSO2 of patients undergoing CVR, increase cerebral blood flow, improve the cerebral oxygen supply/consumption balance, and play a protective role in the brain. It has no significant impact on the incidence of POCD.

10.21037/apm-20-2090

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Citations (12)

DFT study on the gold(I)-catalyzed cycloaddition and rearrangement reactions of allene-containing allylic silyl ether

Research Square (Research Square) (2021)

Yamei Zhao Mengdan Huo HongJi Zhou

Abstract The DFT calculation of the B3LYP level was carried out to explore the reaction mechanism of the synthesis of spirocyclo[4, 5]decane skeleton by gold-catalyzed allenyl compounds. The more accurate energy under the CH3CN solvent in the experiment is calculated by the single point energy of the SMD model. Computational studies have shown that the reaction consists of three main steps: intramolecular cycloaddition of the end group carbon atoms of allenyl and vinyl groups, the semipinacol rearrangement process in which the four-membered ring is reconstructed into the five-membered ring, the elimination reaction releases the catalyst and obtains the product. The calculation results show that Zheng et al. reported that the gold-catalyzed synthesis reaction can easily occur under the experimental conditions due to its low activation free energy (12.42–16.79 kcal/mol). Furthermore, it was found that the MOMO(CH 2 ) 2 substituent has higher reactivity than the corresponding reactant of the phenyl substituent.

Allene

Reactivity

Decane

Silyl ether

10.21203/rs.3.rs-264195/v1

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Citations (0)

CCDC 1961023: Experimental Crystal Structure Determination

The Cambridge Structural Database (2020)

Xiaoqiang Liang Tingting Cao Li Wang Chang-Zheng Zheng Yamei Zhao

10.5517/ccdc.csd.cc23tltc

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Squalene epoxidase promotes the proliferation and metastasis of lung squamous cell carcinoma cells though extracellular signal‐regulated kinase signaling

Thoracic Cancer (2019)

Hong Ge Yamei Zhao Xinyan Shi Zhen Tan Xiaorui Chi

Background The biological function of squalene epoxidase (SQLE), an important rate‐limiting enzyme in downstream cholesterol synthesis, is to convert squalene to 2‐3 oxacin squalene. The expression of SQLE in lung cancer is abnormal. We conducted this study to investigate the effect of SQLE expression on lung squamous cell carcinoma (SCC) proliferation, migration, and invasion and its role in extracellular signal‐regulated kinase (ERK) signaling. Methods Cell Counting Kit 8, wound healing, and Transwell assays; Western blotting; and quantitative real‐time PCR were used to investigate the effect of SQLE in a lung SCC H520 cell line. Kaplan–Meier analysis was used to identify the prognostic significance of SQLE. Results Overexpression of SQLE promoted lung SCC cell proliferation, migration and invasion, whereas knockdown of SQLE expression showed the opposite effect. SQLE can interact with ERK to enhance its phosphorylation. SQLE may contribute to the pathogenesis of lung cancer by modulating ERK signaling. Further survival analysis indicated that high expression of SQLE indicated poor prognosis in lung SCC. Conclusion Our study presents novel evidence of potential biomarkers or therapeutic targets for lung SCC therapy and prognosis.

Squalene monooxygenase

10.1111/1759-7714.12944

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Citations (37)

Investigation of the Effects of Acid Content and Annealing on the Properties of Nanostructured TiO₂ Sol

Integrated ferroelectrics (2020)

Jing Yang Yongbo Mao Yamei Zhao Ruihua Mu Yani Guo

Titanium dioxide (TiO2) sol was prepared using tetrabutyl titanate as a precursor via an acid catalyzed sol-gel process. Investigation of the effects of acid content and annealing on the properties of nanostructured TiO2 materials. The influence of acid content on the sol density, viscosity, stability and particle size were studied and based on the kinematic viscosity data, Gibbs energies of activation for viscous flow (ΔG*) were also calculated. Furthermore, the prepared samples were characterized using X-ray diffraction (XRD), Fourier transform infrared (FTIR) spectroscopy, scanning electron microscopy (SEM), energy dispersive spectrometer (EDS) and ultraviolet-visible (UV-Vis) spectrophotometer. The results showed that the increase of acid content nearly had no obvious influence on the chemical structure of TiO2 sol. With the increase of annealing temperature, titanium dioxide changes from amorphous phase to crystalline phase, anatase coexists with rutile at 600 °C, sample absorbance increases, and the edge of UV-Vis spectra shows red shift. Ti-O-Ti bond is the main structure of TiO2 sol, and the formed TiO2 molecule has linear structure.

Absorbance

Titanium Dioxide

Rutile

10.1080/10584587.2020.1728683

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Citations (1)

Overall analyses of the reactions catalyzed by acetohydroxyacid synthase/acetolactate synthase using a precolumn derivatization-HPLC method

Analytical Biochemistry (2022)

Hui Xian Jin-Meng Tian Xin Wang Zhenqian Zhang Yamei Zhao

Acetoin

Acetolactate synthase

10.1016/j.ab.2022.114980

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Citations (5)