Effects of annealing holding time on capacitance performance of RuO2–IrO2–graphene/Ti electrodes

Yanhong Wang,Shanfeng Huang,Jie Guo,Qiongqiong Ma,Yanqun Shao,Kongfa Chen,Dian Tang 한국물리학회 2019 Current Applied Physics Vol.19 No.7

The thermal decomposition method was used to prepare composite electrodes of the Ruthenium oxide–Iridium oxide–Graphene (RuO2–IrO2–G). Scanning Electron Microscopy (SEM), X–ray diffraction analysis (XRD), and electrochemical tests were used to study the influence of different annealing holding time on the surface morphology, phase composition, and capacitive performance of the coatings. The results showed that more and more RuO2, IrO2 nanoparticles were observed on the surface and cracks of the coating as the annealing holding time increasing. The RuO2–IrO2–G/Ti electrode was obtained by annealing for 5 h. The coating of the electrode consists of a certain amount of amorphous phase and nano–crystalline phase, and it had good electronic conductivity and ionic conductivity. At the same time, the electrode was prepared at 5 h had the largest specific capacitance of 778.46 F/g, which increased by 430.89 F/g than the electrode was prepared at 1 h. In addition, the electrode also had superior capacitance performance, capacitance retention and power characteristics.

Expression of fox-related genes in the skin follicles of Inner Mongolia cashmere goat

Wenjing Han,Xiaoyan Li,Lele Wang,Honghao Wang,Kun Yang,Zhixin Wang,Ruijun Wang,Rui Su,Zhihong Liu,Yanhong Zhao,Yanjun Zhang,Jinquan Li 아세아·태평양축산학회 2018 Animal Bioscience Vol.31 No.3

Objective: This study investigated the expression of genes in cashmere goats at different periods of their fetal development. Methods: Bioinformatics analysis was used to evaluate data obtained by transcriptome sequencing of fetus skin samples collected from Inner Mongolia cashmere goats on days 45, 55, and 65 of fetal age. Results: We found that FoxN1, FoxE1, and FoxI3 genes of the Fox gene family were probably involved in the growth and development of the follicle and the formation of hair, which is consistent with previous findings. Real-time quantitative polymerase chain reaction detecting system and Western blot analysis were employed to study the relative differentially expressed genes FoxN1, FoxE1, and FoxI3 in the body skin of cashmere goat fetuses and adult individuals. Conclusion: This study provided new fundamental information for further investigation of the genes related to follicle development and exploration of their roles in hair follicle initiation, growth, and development.

Theoretical Analysis and Experimental Study on the Influence of Magnet Structure on Sealing Capacity of Magnetic Fluid Seal

Yanhong Cheng,Zhongzhong Wang,Decai Li 한국자기학회 2019 Journal of Magnetics Vol.24 No.3

The Magnetic fluid is a new type of magnetic material. It is a colloidal liquid made of nanoscale ferromagnetic particles suspended in a carrier fluid. Magnetic fluid sealing is one of the most successful applications of the magnetic fluid. As a new type of seal with the advantages of no leakage, long life and high reliability, magnetic fluid seal has been widely used under vacuum and low pressure differential condition. Two types of permanent magnets, the annular permanent magnets and the cylindrical magnets, are usually used in magnetic fluid seals in engineering. However, the influence of permanent magnet structure on sealing capacity was not clear, hence a new experimental setup was designed in order to study the influence of permanent magnet structure on sealing capacity. The annular permanent magnets and the cylindrical magnets were used as the magnetic source of the experimental setup in a series of tests respectively. The relationship between the sealing capacity of magnetic fluid seal and the end-face area, axial length of the magnet was analyzed by the electromagnetism theories and theoretical derivation. The result of the experiments shows that the sealing capability grows with the end-face area of the magnet, and the growth rate becomes much slower when magnet end-face area attains a certain value; the reluctance of pole pieces and shaft can’t be ignored when magnetic field attains a certain value; the modified theoretical formula had a good match to the measured values when the end-face area of the magnet is small enough to ignore the reluctance of pole pieces and shaft.

Improved Pareto/NBD Model and Its Applications in Customer Segmentation based on Personal Information Combination

Yanhong Guo,Hui Wang,Wei Liu 보안공학연구지원센터 2013 International Journal of Database Theory and Appli Vol.6 No.5

Effect of Codonopsis pilosula polysaccharide on the quality of sheep semen preservation at 4℃

Yuqin Wang,Yanhong Zhao,Hua Chen,Tingting Lu,Rujie Yang,Xiuxiu Weng,Wanhong Li Asian Australasian Association of Animal Productio 2024 Animal Bioscience Vol.37 No.6

Objective: This study aimed to investigate the effect of Codonopsis pilosula polysaccharide (CPP) on the motility, mitochondrial integrity, acrosome integrity rate, and antioxidant ability of sheep sperm after preservation at 4℃. Methods: Semen from healthy adult rams were collected and divided into four groups with separate addition of 0, 200, 400, and 1,000 mg/L CPP. Sperm motility was analyzed using the Computer-Assisted Semen Analysis software after preservation at 4℃ for 24, 72, 120, and 168 h. Sperm acrosome integrity rate was analyzed by Giemsa staining at 24, 72, and 120 h, and mitochondrial membrane integrity was analyzed by Mito-Tracker Red CMXRos. The total antioxidant capacity (T-AOC) and malondialdehyde (MDA) content of spermatozoa were measured after 120 h of preservation. Results: The sperm viability and forward-moving sperm under 200 mg/L CPP were significantly higher than that in the control group at 72 h (61.28%±3.89% vs 52.83%±0.70%, 51.53%±4.06% vs 42.84%±1.14%), and 168 h (47.21%±0.85% vs 41.43%±0.37%, 38.68%±0.87% vs 31.68%±0.89%). The percentage of fast-moving sperm (15.03%±1.10% vs 11.39%±1.03%) and slow-moving sperm (23.63%±0.76% vs 20.29%±1.11%) in the 200 mg/L group was significantly higher than control group at 168 h. The mitochondrial membrane integrity of the sperm in the group with 200 mg/L CPP was significantly higher than those in the control group after storage at 4℃ for 120 h (74.76%±2.54% vs 65.67%±4.51%, p<0.05). The acrosome integrity rate in the group with 200 mg/L (87.66%±1.26%) and 400 mg/L (84.00%±2.95%) was significantly higher than those in the control group (80.65%±0.16%) after storage for 24 h (p<0.05). CPP also increased T-AOC and decreased the MDA concentration after preservation at 4℃ (p<0.05). Conclusion: Adding CPP could improve the T-AOC of sperm, inhibit lipid peroxidation, and facilitate semen preservation.

Centrifugal Infiltration Process of Fibrous Tubular Preform by Al-Cu Alloy

Li, Yanhong,Wang, Kai,Su, Yongkang,Hu, Guoxin The Korean Society for Composite Materials 2009 Advanced composite materials Vol.18 No.4

The kinetics of centrifugal infiltration of fibrous tubular preform is built theoretically, and simulations are conducted to study the effects of various casting conditions on infiltration kinetics and macrosegregation by combining with the energy, mass and kinetic equations. A similarity way is used to simplify the one-dimensional model and the parameter is ascertained by an iterative method. The results indicate that the increase of superheat, initial preform temperature, porosity tends to enlarge the remelting region and decrease copper solute concentration at the infiltration front. Higher angular velocity leads to smaller remelting region and solute concentration at the tip. The pressure in the infiltrated region increase significantly when the angular velocity is much higher, which requires a stronger preform. It is observed that the pressure distribution is mainly determined by the angular velocity, and the macrosegregation in the centrifugal casting is greatly dependent on the superheat of inlet metal matrix, initial temperature and porosity of the preform, and the angular velocity.

A Dominant Mutation in ARL2 Causes Impaired Adventitious Root Development in Rice

Shiping Liu,Yanhong Xue,Xiaofei Wang,Botao Zhang,Yuting Bi,Min Qiu,Guangxi Wang,Ping Wu 한국식물학회 2011 Journal of Plant Biology Vol.54 No.4

Adventitious roots are vital for water and nutrient assimilation by cereal crops because they comprise the bulk of the fibrous root system. We isolated and analyzed a rice mutant, adventitious rootless 2 (arl2), which failed to initiate adventitious root primordia during early development. Its seminal root produced fewer lateral roots than from the wild type. This mutant also exhibited pleiotropic phenotypes of longer and thicker seminal roots, a different morphology for the first leaf, delayed heading, and a greater tiller angle. Physiological experiments showed that exogenous auxin and ethylene could rescue adventitious root growth, a response opposite that for two previously reported mutants, arl1 and gnom1. Activity in the auxin signal pathway and the polar auxin transport system was normal for arl2. Compared with the wild type, arl2 plants showed enhanced sensitivity to ethephon but decreased sensitivity to AgNO_3, an inhibitor of ethylene. Genetics analysis demonstrated that this mutant is controlled by a single dominant gene; ARL2 was mapped within a 100-kb interval on the short arm of chromosome 2.

On Synergistic Effects of Hierarchical γ′ Precipitates and Discontinuous Plastic Flow in a Ni-based Single Crystal Superalloy with an [001] Orientation

Yunling Du,Yanhong Yang,Shuai Guan,Xinguang Wang,Chuanyong Cui,Jinguo Li,Yizhou Zhou,Xiaofeng Sun 대한금속·재료학회 2024 METALS AND MATERIALS International Vol.30 No.1

A discontinuous plastic flow is detected in a single-crystal superalloy with an [001] orientation during tensile tests over a wide temperature range. Results reveals that the synergistic impact of normal γ′ precipitates and nanoscale γ′ precipitates in γ matrix on the dislocations motion is the root of the serrated flow.

Creep Properties of a Nickel-Based Single Crystal Superalloy with Low Density

Yuling Du,Zihao Tan,Yanhong Yang,Xinguang Wang,Yizhou Zhou,Jingguo Li,Xiaofeng Sun 대한금속·재료학회 2021 METALS AND MATERIALS International Vol.27 No.12

A novel nickel-based single crystal superalloy with low density had been designed and the creep deformation mechanismsof the experiment alloy under two conditions (1050 °C/200 MPa and 1100 °C/137 MPa) had been systematically discussed. The topological inversion had been observed after fracture under the above two conditions. The effects of temperature andstress on creep life of the experiment alloy had been found no significant difference under the two conditions. It was indicatedthat the small decrease in temperature exerted limited influence on the creep behaviors of single crystal superalloys in therange of high temperature.

Overexpression of OsVP1 and OsNHX1 Increases Tolerance to Drought and Salinity in Rice

Shiping Liu,Luqing Zheng,Yanhong Xue,Qian Zhang,Lu Wang,Huixia Shou 한국식물학회 2010 Journal of Plant Biology Vol.53 No.6

Drought and salinity are major abiotic stresses affecting rice production. To improve plant tolerance to salinity and drought, we overexpressed rice Na+/H+ exchangers (OsNHX1) and H+-pyrophosphatase in tonoplasts (OsVP1) in a japonica elite rice cultivar, Zhonghua 11. Compared with our wild-type control, transgenic plants overexpressing both genes incurred less damage when exposed to long-term treatment with 100 mM NaCl or water deprivation. Under high-saline conditions, the transformants accumulated less Na+ and malondialdehyde in the leaves,thereby allowing the plants to maintain a low level of leaf water potential and reduce stress-induced damage. Those transgenics also had higher photosynthetic activity during the stress period. Under those conditions, they also showed an increase in root biomass, which enabled more water uptake. These results suggest that OsVP1 and OsNHX1 improve the tolerance of rice crops against drought and salt by employing multiple strategies in addition to osmotic regulation.