Enhanced Room-Temperature Thermoelectric Performance of In-Doped ZnO:Al Thin Films through Prefabricated Layer Doping Method

Ping Fan,Zhuang-Hao Zheng,Jing-Ting Luo,Guang-Xing Liang,Dong-Ping Zhang 대한금속·재료학회 2015 ELECTRONIC MATERIALS LETTERS Vol.11 No.3

In this study, AZO thin films prepared by direct current reactive magnetron sputtering using a Zn-Al alloy target and In with varied content were doped through the prefabricated layer doping method in order to optimize their thermoelectric properties. The effects of In content on the room temperature microstructure and thermoelectric properties of the AZO thin films were investigated. It was found that the absolute value of the Seebeck coefficient of the thin films increases stably after In doping and reaches 153 μV·K−1 when the In content is 0.71%. Though the electrical conductivity of In-doped thin films is smaller than those of the un-doped films, the power factor of the thin films shows a significant increase after In doping with a maximum value of 2.22 × 10−4 W·m−1·K−2, which is several times that of the un-doped films.

The association between couple relationship quality and sleep quality: a systematic review and meta-analysis

Xing Xing Wang,Qingxiu Lin,Ping Dong,Ya Bin Wei,Jia Jia Liu 한국간호과학회 2023 한국간호과학회 학술대회 Vol.2023 No.11

The Lymphotoxin-α 252 A>G Polymorphism and Breast Cancer: A Meta-analysis

Zhou, Ping,Huang, Wei,Chu, Xing,Du, Liang-Feng,Li, Jian-Ping,Zhang, Chun Asian Pacific Journal of Cancer Prevention 2012 Asian Pacific journal of cancer prevention Vol.13 No.5

Objective: The aim of this meta-analysis is to evaluate associations between LTA-252 A>G and breast cancer (BC). Methods: Electronic searches of several databases were conducted for all online publications. A total of 7 studies involving 4,625 BC patients and 4,373 controls were identified. Results: This meta-analysis showed no significant association between the LTA-252 A>G polymorphism and BC in overall or Caucasian populations. However, a positive association was found limited to Asian populations. Conclusion: Although there was no significant association found between the LTA-252 A>G polymorphism and BC overall, a positive association was found in Asian populations.

The genetic engineering of glycine betaine synthesis in tobacco improves the resistance of the photosynthetic apparatus to drought stress

Wang Gui-Ping,Xue Xiao-Min,Yang Xing-hong,Chen Ru,Han Xue-Ping 한국식물생명공학회 2022 Plant biotechnology reports Vol.16 No.2

In recent years, with the global climate change, the intensity, frequency and duration of drought have increased significantly, which has become the main limiting factor for agricultural development in many areas. Glycine betaine (GB) is an effec- tive stress-resistant substance. In this experiment, the effects of the genetic engineering of GB synthesis on photosynthetic apparatus of tobacco under drought stress were studied using transgenic tobacco (T) accumulating GB and wild-type tobacco (K326, WT). Potted tobaccos were subjected to drought stress (controlled irrigation, 25 °C ± 1 °C, a relative humidity: 75–80%) for 9 days, photosynthetic gas exchange parameters, chlorophyll a fluorescence, structure of chloroplast and thyla- koid membrane, and protein function of thylakoid membrane were examined under different drought stress time (days). The results showed that T tobacco could accumulate GB and the accumulated GB improved the resistance of the photosynthetic apparatus to drought stress. Under drought stress, the damage of chloroplast and thylakoid lamellae in T tobacco was less than that in WT tobacco, the accumulation of GB in T tobacco could maintain the stability of thylakoid membrane, improved the unsaturated fatty acid index (IUFA) of thylakoid membrane lipid, increased the contents of digalactosyl diacylglycerol (DGDG) and phosphatidylglycerol (PG), and decreased the ratio of monogalactosyl diaylglycerol (MGDG) to DGDG. In addition, under drought stress, the accumulation of GB in T tobacco alleviated the photo-inhibition of PSII, and the increase of xanthophyll cycle de-epoxidation may be one of the reasons for the enhancement of PSII function.

Effects of Oxygen Content on the Simultaneous Microbial Removal of SO2 and NOx in Biotrickling Towers

Xing Chun Wang,Xiao Yi Bi,Pei Shi Sun,Jin Quan Chen,Ping Zou,Xiao Ming Ma,Jing Zhang,Hai Yu Wang,Xiao Yi Xu 한국생물공학회 2015 Biotechnology and Bioprocess Engineering Vol.20 No.5

This study uses microbial methods to research the influence of oxygen (O2) content on the removal efficiency of sulfur dioxide (SO2) and nitrogen oxides (NOx) in a tandem twin-towers desulfurization and denitrification process system. Oxygen can play a significant role in biotrickling towers. Other important factors had already been optimized prior to the study, including inlet concentration, gas flow rate, and temperature. SO2 and NOx were prepared by a chemical method. A gas flow meter was used to regulate nitrogen (N2) that had been stored in steel cylinders. In this way, the O2 content was adjusted in the biotrickling towers by controlling the N2 flow rate. Five gradients of O2 content were selected for investigation, namely 4, 8, 12, 16, and 20%. Results indicated that the SO2 removal efficiency from mixed gas (SO2 and NOx) can reach 100%, from all of the five O2 gradients, in biotrickling towers. In a tandem twin-towers desulfurization and denitrification process system, the NOx removal efficiency and the inlet concentration of nitrogen dioxide (NO2) gradually increased as the O2 content increased. Specifically, the average removal efficiency of NOx increased from 49.28 to 80.85% as the O2 content changed from 4 to 20%. The oxygen levels influenced the removal of NOx but the SO2 removal efficiency in mixed gas was always stable.

Chemical, optical, and electrical characterization of Ga2O3 thin films grown by plasma-enhanced atomic layer deposition

Xing Li,Hong-Liang Lu,Hong-Ping Ma,Jian-Guo Yang,Jin-Xin Chen,Wei Huang,Qixin Guo,Jijun Feng,David Wei Zhang 한국물리학회 2019 Current Applied Physics Vol.19 No.2

Thin Ga2O3 films were grown on Si (100) using trimethylgallium (TMG) and oxygen as the precursors through plasma-enhanced atomic layer deposition. The depositions were made over a temperature range of 80–250 °C with a growth per cycle of around 0.07 nm/cycle. Surface self-saturating growth was obtained with TMG pulse time ≥20 ms at a temperature of 150 °C. The root mean square surface roughness of the obtained Ga2O3 films increased from 0.1 nm to 0.3 nm with increasing the growth temperature. Moreover, the x-ray photoelectron spectroscopy analysis indicated that the obtained film was Ga-rich with the chemical oxidation states Ga3+ and Ga1+, and no carbon contamination was detected in the films after Ar+ sputtering. The electron density of films measured by x-ray reflectivity varied with the growth temperature, increasing from 4.72 to 5.80 g/cm3 . The transmittance of Ga2O3 film deposited on a quartz substrate was obtained through ultraviolet visible (UV–Vis) spectroscopy. An obvious absorption in the deep UV region was demonstrated with a wide band gap of 4.6–4.8 eV. The spectroscopic ellipsometry analysis indicated that the average refractive index of the Ga2O3 film was 1.91 at 632.8 nm and increased with the growth temperature due to the dense structure of the films. Finally, the I-V and C-V characteristics proved that the Ga2O3 films prepared in this work had a low leakage current of 7.2 × 10−11 A/cm2 at 1.0 MV/cm and a high permittivity of 11.9, suitable to be gate dielectric.

Method of Integrating Landsat-5 and Landsat-7 Data to Retrieve Sea Surface Temperature in Coastal Waters on the Basis of Local Empirical Algorithm

Xing, Qianguo,Chen, Chu-Qun,Shi, Ping The Korean Society of Oceanography 2006 Ocean science journal Vol.41 No.2

A useful radiance-converting method was developed to convert the Landsat-7 ETM+thermal-infrared (TIR) band's radiance ($L_{{\lambda},L7/ETM+}$) to that of Landsat-5 TM TIR ($L_{{\lambda},L5/TM+})$ as: $L_{{\lambda},L5/TM}=0.9699{\times}L_{{\lambda},L7/ETM+}+0.1074\;(R^2=1)$. In addition, based on the radiance-converting equation and the linear relation between digital number (DN) and at-satellite radiance, a DN-converting equation can be established to convert DN value of the TIR band between Landsat-5 and Landsat-7. Via this method, it is easy to integrate Landsat-5 and Landsat-7 TIR data to retrieve the sea surface temperature (SST) in coastal waters on the basis of local empirical algorithms in which the radiance or DN of Lansat-5 and 7 TIR band is usually the only input independent variable. The method was employed in a local empirical algorithm in Daya Bay, China, to detect the thermal pollution of cooling water discharge from the Daya Bay nuclear power station (DNPS). This work demonstrates that radiance conversion is an effective approach to integration of Landsat-5 and Landsat-7 data in the process of a SST retrieval which is based on local empirical algorithms.

Gene screening and differential expression analysis of microRNAs in the middle silk gland of wild-type and naked pupa mutant silkworms (Bombyx mori)

Ping Qian,Xin Wang,Tao Jianga,Fei Song,Chen Chen,Yangyang Fan,Xing-jia Shen 한국응용곤충학회 2016 Journal of Asia-Pacific Entomology Vol.19 No.2

MicroRNAs (miRNAs) are a class of endogenous, non-coding small RNAs that serve as important posttranscriptional gene expression regulators and play important roles in the silkworm (Bombyx mori) development, growth, and viral immunity. However, information on the diversity of these regulatory RNAs in the middle silk gland (MSG) of naked pupa (Nd) mutant silkworms is limited. In this study, by using Solexa high-throughput sequencing technology, we identified and compared small RNA libraries from the MSG of wild-type silkworm P50(MSG-P50) and the Nd mutant (MSG-Nd), respectively. A total of 272 conserved and 333 novel miRNAs were identified, in which 141 ones showed significantly different expression patterns between MSG-P50 and MSG-Nd, and 10 ones were randomly selected and validated by stem-loop quantitative reverse-transcription polymerase chain reaction (qRT-PCR). In addition, potential targets were predicted for differentially expressed miRNAs based on sequence complementation between miRNAs and their target genes. Gene ontology (GO) and the Kyoto Encyclopedia of Genes and Genomes (KEGG) annotation revealed miRNAs that actively participate in various life processes and three pathways associated with protein synthesis including endoplasmic reticulum pathway, ribosome pathway, and ribosome biogenesis in eukaryotes, were significantly disrupted in MSG-Nd. This is the first comprehensive description of miRNAs in the silkworm MSG. Overall, the results provide useful information for future studies on miRNAs and suggest that the fibroin synthetic deficiency in the posterior silk gland impairs the sericin secretion process in MSG.

Green synthesis of silver nanoparticles using grape seed extract and their application for reductive catalysis of Direct Orange 26

Ping Yao,Jun Zhang,Tieling Xing,Guo-Qiang Chen,Ran Tao,추광호 한국공업화학회 2018 Journal of Industrial and Engineering Chemistry Vol.58 No.-

This study focused on the green synthesis of silver nanoparticles (AgNPs) using grape seed extract and their use for the catalytic degradation of a hazardous dye. The reaction temperature for the synthesis had great impacts to the properties of AgNPs and thereby, contributed to their activity for reductive decomposition of Direct Orange 26 by NaBH4. The elevated temperature made silver particles grow bigger and so reduced the effectiveness of surface catalysis. This was evidenced by the decrease in the reaction rate of AgNPs. The biosynthesis of AgNPs below 40 °C had no negative effect on the degradation of Direct Orange 26.

The Therapeutic Effects of Tectorigenin on Chemically Induced Liver Fibrosis in Rats and an Associated Metabonomic Investigation

Xing-Xi Gao,Jun-Hua Wu,Da-Hua Shi,Yun-Xi Chen,Jiang-Tao Cui,Yu-Rong Wang,Chun-Ping Jiang 대한약학회 2012 Archives of Pharmacal Research Vol.35 No.8

The aim of this study was to investigate the effects of tectorigenin on chemically induced liver fibrosis in rats. Liver fibrosis was induced in rats with carbon tetrachloride, a diet high in fat, cholesterol and alcohol in the drinking water. Our results indicate that tectorigenin treatment significantly inhibited the increases in the activities of alanine aminotransferase (ALT),aspartate aminotransferase (AST) and the increases in the serum levels of hyaluronate (HA), laminin (LN) and procollagen III N-terminal peptide (PIIIP); tectorigenin treatment also significantly inhibited the increases in the amount of collagen in the livers of the fibrogenic rats. Chemically induced liver fibrosis caused a drop in the serum albumin concentration and a decrease in the ratio of albumin to globulin (A/G). Tectorigenin caused a remarkable increase at a dose of 30 mg/kg, but only a slight increase at the lower doses. Tectorigenin was also able to inhibit the increase in the liver lipid peroxidation (LPO), as well as the decrease in the activities of liver superoxide dismutase (SOD) and glutathione peroxidase (GSH-Px), caused by liver fibrosis. In addition, we present a related metabolic profile determined, using a 1H NMR spectroscopy and multivariate pattern recognition techniques. The results were consistent with the pathological examination, liver function analysis and liver fibrosis marker analysis. Furthermore, tectorigenin does not cause acute toxicity.