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Your search keyword '"Liu, Chunmei"' showing total 62 results
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62 results on '"Liu, Chunmei"'

1. Revealing the Influential Mechanism of the Direct Current on Columnar-to-Equiaxed Transition in Directionally Solidified Al–15Sn–1Cu Alloy Under 10 T Magnetic Field

Author

Tang, Ganpei, primary, Zhang, Congjiang, additional, Sun, Zhe, additional, Chen, Liangguo, additional, Zhao, Lun, additional, Lin, Zhongze, additional, Zheng, Tianxiang, additional, Zhou, Bangfei, additional, Shi, Peijian, additional, Li, Qiang, additional, Ren, Weili, additional, Ding, Biao, additional, Shen, Zhe, additional, Liu, Chunmei, additional, and Zhong, Yunbo, additional

Published
2024
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2. Magnetic-Controlled Short Process Preparation Technique for Phosphor Bronze Based on Structure Refinement

Author

Shen, Zhe, primary, Luo, Boyi, additional, Liang, Yuanxin, additional, Zhao, Lun, additional, Zhang, Shunran, additional, Lin, Zhongze, additional, Tang, Ganpei, additional, Shi, Peijian, additional, Zheng, Tianxiang, additional, Zhou, Bangfei, additional, Lu, Haibiao, additional, Li, Qiang, additional, Ding, Biao, additional, Liu, Chunmei, additional, and Zhong, Yunbo, additional

Published
2024
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7. Numerical Investigation About the Effect of Axial Static Magnetic Field on Improvement of Metal Pool Profile During Electroslag Remelting Process

Author

Xia, Zhibin, primary, Sun, Zhonghao, additional, Zhang, Mingliang, additional, Lin, Wenhao, additional, Zheng, Tianxiang, additional, Shen, Zhe, additional, Ding, Biao, additional, Liu, Chunmei, additional, Lu, Haibiao, additional, Lei, Zuosheng, additional, Guo, Yifeng, additional, Li, Qiang, additional, and Zhong, Yunbo, additional

Published
2023
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8. An IgM-like inhalable ACE2 fusion protein broadly neutralizes SARS-CoV-2 variants

Author

Liu, Juan, primary, Mao, Fengfeng, additional, Chen, Jianhe, additional, Lu, Shuaiyao, additional, Qi, Yonghe, additional, Sun, Yinyan, additional, Fang, Linqiang, additional, Yeung, Man Lung, additional, Liu, Chunmei, additional, Yu, Guimei, additional, Li, Guangyu, additional, Liu, Ximing, additional, Yao, Yuansheng, additional, Huang, Panpan, additional, Hao, Dongxia, additional, Liu, Zibing, additional, Ding, Yu, additional, Liu, Haimo, additional, Yang, Fang, additional, Chen, Pan, additional, Sa, Rigai, additional, Sheng, Yao, additional, Tian, Xinxin, additional, Peng, Ran, additional, Li, Xue, additional, Luo, Junmian, additional, Cheng, Yurui, additional, Zheng, Yule, additional, Lin, Yongqing, additional, Song, Rui, additional, Jin, Ronghua, additional, Huang, Baoying, additional, Choe, Hyeryun, additional, Farzan, Michael, additional, Yuen, Kwok-Yung, additional, Tan, Wenjie, additional, Peng, Xiaozhong, additional, Sui, Jianhua, additional, and Li, Wenhui, additional

Published
2023
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30. A bifunctional type III polyketide synthase from raspberry (Rubus idaeus L.) with both chalcone synthase and benzalacetone synthase activity

Author

Liu Wenbin, You-Nian Wang, Feng Jing, Mingfeng Yang, Lanqing Ma, Yadong Yang, Huili Guo, Liu Chunmei, Ma Yadi, Heshu Lü, and Luo Zaiqi

Subjects
0106 biological sciences, 0301 basic medicine, Chalcone synthase, chemistry.chemical_classification, biology, ATP synthase, Raspberry ketone, Plant Science, 01 natural sciences, Blowing a raspberry, 03 medical and health sciences, chemistry.chemical_compound, 030104 developmental biology, Enzyme, chemistry, Biochemistry, Polyketide synthase, biology.protein, Phosphofructokinase 2, Bifunctional, Agronomy and Crop Science, 010606 plant biology & botany, Biotechnology
Abstract

Raspberry ketone accounts for the characteristic aroma of the raspberry fruit. A bifunctional enzyme with both chalcone synthase (CHS) and benzalacetone synthase (BAS) activity is thought to play a crucial role in the synthesis of p-hydroxybenzalacetone, yet the in vitro enzymatic properties and reaction products of the CHS/BAS recombinant enzyme from raspberry have not been characterized. In this work, a type III polyketide synthase (PKS) gene (RinPKS1) and its corresponding cDNA were isolated from raspberry. Sequence and phylogenetic analyses demonstrated that RinPKS1 is a CHS. However, functional and enzymatic analyses showed that recombinant RinPKS1 is a bifunctional enzyme with both CHS and BAS activity. RinPKS1 showed some interesting characteristics: (1) no traces of bis-noryangonin and 4-coumaroyltriacetic acid lactone could be detected in the enzyme reaction mixture at different pH values; and (2) recombinant RinPKS1 overexpressed in Escherichia coli effectively yielded p-hydroxybenzalacetone as a dominant product at high pH; however, it effectively yielded naringenin as a dominant product at low pH. Furthermore, 4-coumaroyl-CoA and feruloyl-CoA were the only cinnamoyl-CoA derivatives accepted as starter substrates. RinPKS1 did not accept isobutyryl-CoA, isovaleryl-CoA or acetyl-CoA as substrates.

Published
2016

31. Lipid desaturation in prokaryotic pathway abates the high-oleic phenotype of FAD2-silenced tobacco at lower temperature

Author

Jing Yang, Lulu Zhang, Feiyan Xue, Lanqing Ma, Mingfeng Yang, Liu Chunmei, and Heshu Lü

Subjects
0106 biological sciences, 0301 basic medicine, chemistry.chemical_classification, biology, Nicotiana tabacum, fungi, food and beverages, RNA, Plant Science, Plant cell, biology.organism_classification, 01 natural sciences, Hexadecatrienoic Acid, 03 medical and health sciences, Oleic acid, chemistry.chemical_compound, 030104 developmental biology, chemistry, Biochemistry, Microsome, Plastid, Agronomy and Crop Science, 010606 plant biology & botany, Biotechnology, Polyunsaturated fatty acid
Abstract

The stability of the high-oleic characteristic of tobacco (Nicotiana tabacum) transformants obtained by silencing of microsomal Ω-6 desaturase (FAD2) was investigated when grown at low temperature. Results showed that oleic acid content in total leaf lipids, individual leaf lipids and total seed lipids of transformants decreased drastically at low temperature, with a corresponding increase of polyunsaturated fatty acid contents. The decrease of oleate was caused by neither the restoration of FAD2 transcripts nor the disappearance of small interference RNA. A significant increase of hexadecadienoic acid and hexadecatrienoic acid was observed in MGDG (monogalactosyldiacylglycerol) of transformants grown at lower temperature. Hexadecadienoic and hexadecatrienoic acids, typical fatty acids in MGDG, are produced through the activity of Ω-6 desaturase in plastids (FAD6). The significant increase of Hexadecadienoic and hexadecatrienoic acids suggested the involvement of FAD6 and/or other desaturases in the lipid desaturation of transgenic plants under lower temperature, leading to a significant decrease of oleate in plant cells. These results suggested that the activities of plastidic desaturases must be, at least partially, responsible for the instability of the high-oleic characteristic of FAD2-silenced plants.

Published
2016

34. Effect of particle conductivity on Fe-Si composite electrodeposition

Author

Zheng Tian-Xiang, Zhong Yunbo, Liu Chunmei, and Long Qiong

Subjects
Materials science, Silicon, Particle number, Composite number, Metallurgy, technology, industry, and agriculture, chemistry.chemical_element, General Chemistry, Conductivity, engineering.material, chemistry, Chemical engineering, Coating, engineering, Particle, Mass fraction, Current density
Abstract

Coatings containing Fe-Si or Si particles were electrodeposited on 3.0%(mass fraction) Si steel sheets. The surface morphology, the cross-section and the silicon content of coating have been investigated, respectively. It was found that the number of particles on the coating surface and cross-section significantly decreased with increasing silicon content in the applied particles, leading to a decrease of the silicon content of coatings. About 10.2% silicon content of coatings deposited with Fe-30%Si particles can be obtained, whereas that for Si particles was only 2.9% at a particle concentration of 100 g/L and current density of 2 A/dm2. This is mainly attributed to the conductivity of applied particles. High conductivity can promote the co-deposition of the particles. With increasing silicon content in the particles, their conductivity decreased sharply, resulting in the decrease of silicon content of coatings. Present work may initiate a new method to modify the particle content of the composite coatings via changing the conductivity of the particles during the composite electrodeposition. In this paper, a possible mechanism was proposed to explain the phenomena.

Published
2014

38. Mechanism of retinoic acid and mitogen-activated protein kinases regulating hyperoxia lung injury

Author

Liu Chunmei, Zhang Qian-shen, Wang Hong, LI Wen-bin, Liu Wei, Chang Liwen, Wang Hua, and Rong Zhihui

Subjects
p38 mitogen-activated protein kinases, Biomedical Engineering, Retinoic acid, Apoptosis, Tretinoin, Biology, Lung injury, Biochemistry, Rats, Sprague-Dawley, Biomaterials, Andrology, chemistry.chemical_compound, In Situ Nick-End Labeling, Genetics, medicine, Animals, Hypoxia, Lung, Cells, Cultured, Earth-Surface Processes, Hyperoxia, Respiratory Distress Syndrome, TUNEL assay, Kinase, Rats, Enzyme Activation, Animals, Newborn, Terminal deoxynucleotidyl transferase, chemistry, Mitogen-activated protein kinase, Immunology, biology.protein, Female, Mitogen-Activated Protein Kinases, medicine.symptom
Abstract

To investigate the protective effect of retinoic acid (RA) on hyperoxic lung injury and the role of RA as a modulator on mitogen-activated protein kinases (MAPKs), gastation 21 d Sprague-Dawley (SD) fetuses (term = 22 d) were delivered by hysterotomy. Within 12-24 h of birth, premature rat pups were randomly divided into 4 groups (n=12 each): air-exposed control group (group I); hyperoxia-exposed group (group II), air-exposed plus RA group (group III), hyperoxia-exposed plus RA group (group IV). Group I, III were kept in room air, and group II, IV were placed in 85 % oxygen. The pups in groups III and IV were intraperitoneally injected with RA (500 microg/kg every day). All lung tissues of premature rat pups were collected at the 4th day after birth. Terminal transferase d-UTP nick end labeling (TUNEL) staining was used for the detection of cell apoptosis. The expression of PCNA was immunohistochemically detected. Western blot analysis was employed for the determination of phosphorylated and total nonphosphorylated ERKs, JNKs or p38. Our results showed that lungs from the pups exposed to hyperoxia for 4 d exhibited TUNEL-positive nuclei increased markedly throughout the parenchyma (P0.01), and decreased significantly after RA treatment (P0.01). The index of PCNA-positive cells was significantly decreased (P0.01), and was significantly increased by RA treatment (P0.01). The air-space size was significantly enlarged, secondary crests were markedly decreased in hyperoxia-exposed animals. RA treatment improved lung air spaces and secondary crests in air-exposed pups, but had no effect on hyperoxia-exposure pups. Western blotting showed that the amounts of JNK, p38 and ERK proteins in hyperoxia-exposure or RA-treated lung tissues were same as those in untreated lung tissues (P0.05), whereas activation of these MAPKs was markedly altered by hyperoxia and RA. After hyperoxia exposure, p-ERK1/2, p-JNK1/2 and p-p38 were dramatically increased (P0.01), whereas p-JNK1/2 and p-p38 were markedly declined and p-ERK1/2 was further elevated by RA treatment (P0.01). It is concluded that RA could decrease cell apoptosis and stimulate cell proliferation under hyperoxic condition. The protection of RA on hyperoxia-induced lung injury was related to the regulation of MAP kinase activation.

Published
2006

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