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Changes in Activities of Antioxidant-Related Enzymes in Leaves of Resistant and Susceptible Wheat Inoculated with Rhizoctonia cerealis

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Agricultural Sciences in China 2011年第4期10卷 526-533页

作者： LIU Hong-xia XIN zhi-yong ZHANG Zeng-yan National Key Facility for Crop Gene Resources and Genetic Improvement~Institute of Crop Sciences Chinese Academy of AgriculturalSciences Beijing 100081 P.R. China

In this study, the changes in activities of peroxidase （POD）, glutathione S-transferase （GST）, catalase （CAT）, and superoxide distmuase （SOD） in leaves of four wheat cultivars, including resistant cultivars Shannong 0431 and Shanhongmai, a mildsusceptible cultivar Lumai 21, and a susceptible cultivar Wenmai 6, were investigated to explore if these antioxidantrelated enzymes were involved in wheat defense response to Rhizoctonia cerealis attack. Results showed that the activities of these enzymes in different wheat cultivars varied greatly after challenging with R. cerealis. The POD activities in resistant cultivars Shannong 0431 and Shanhongmai increased much quicker after the inoculation and displayed much higher activity than that in susceptible cultivar Wenmai 6. In contrast, POD activity showed a slow accumulation and a delayed peak time. The activities of GST and CAT in Shannong 0431 and Lumai 21 increased obviously within 48 h post inoculation （hpi）, whereas SOD activity decreased dramatically within 24 hpi in Shannong 0431 and 24-48 hpi in Lumai 21. In susceptible cultivar Wenmai 6, the SOD and CAT activities didn’t change obviously, whereas the activity of GST was decreased. The activities of CAT and GST in Shanhongmai did not show significant difference compared with those in Wenmai 6. Results suggested that POD activity may be positively associated with wheat defense to R. cerealis.

关键词： wheat Rhizoctonia cerealis antioxidant-related enzymes peroxidase

Calculation and Analysis of Force in Roll System of 20-High Sendzimir Mill

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Journal of Iron and Steel Research International 2013年第9期20卷 33-39页

作者： WANG Zhao-hui GAO Quan-jie YAN Chao xia zhi-yong ZHANG Yao-bing Key Laboratory of Metallurgical Equipment and Control of Education Ministry Wuhan University of Science and Technology

The calculation of force for a roll system has significant effects on cold roiled thin strip gauge adjustment of a 20-high Sendzimir mill. According to the rolling parameters and rolling plans of a ZR 22B-42 Sendzimir mill in a silicon steel factory, the contact force and the resultant force of each roll in the roll system were calculated both in the static state and in the rolling state through C＋＋ programs. It was found that the contact force between the see ond intermediate driven roll and the back up rolls B and C was much lower than that between the other rolls in static state. The results also demonstrated that the resultant force are 59.5%-62%, 37.7%-40.3%, 87.1%-88.7% and 53.9%-56.7% of the rolling force at the second intermediate driven roll, the second intermediate idler roll, the back-up rolls B and C and the back-up rolls A and D, respectively. It was also revealed that the minimum contact force generated between the first intermediate roll and the second intermediate idler roll is 206.7 kN on the first roll ing pass, and that on the second rolling pass, the minimum contact force generated between the second intermediate driven roll and the back-up roll C is 470.7 kN.

关键词： Sendzimir mill roll system static state rolling force

Colorful Cause Geared to Help Develop Tibet

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China's Tibet 1995年第6期6卷 4-9页

作者： zhi xia,yong LE

ＣｏｌｏｒｆｕｌＣａｕｓｅＧｅａｒｅｄｔｏＨｅｌｐＤｅｖｅｌｏｐＴｉｂｅｔＺＨＩＸＩＡ，ＹＯＮＧＬＥＩｎｔｈｅｇｏｌｄｅｎａｕｔｕｍｎｍｏｎｔｈｏｆＡｕｇｕｓｔ，ＬｉＲｕｉｈｕａｎ，ｃｈａｉｒｍａｎｏｆｔｈｅＣｈｉｎ... 详细信息

ＣｏｌｏｒｆｕｌＣａｕｓｅＧｅａｒｅｄｔｏＨｅｌｐＤｅｖｅｌｏｐＴｉｂｅｔＺＨＩＸＩＡ，ＹＯＮＧＬＥＩｎｔｈｅｇｏｌｄｅｎａｕｔｕｍｎｍｏｎｔｈｏｆＡｕｇｕｓｔ，ＬｉＲｕｉｈｕａｎ，ｃｈａｉｒｍａｎｏｆｔｈｅＣｈｉｎｅｓｅＰｅｏｐｌｅ＇ｓＰｏｌｉｔｉ...

关键词： Colorful Cause Geared to Help Develop Tibet

Asperuloside Promotes Apoptosis of Cervical Cancer Cells through Endoplasmic Reticulum Stress-Mitochondrial Pathway

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Chinese Journal of Integrative Medicine 2024年第1期30卷 34-41页

作者： QI zhi-min WANG xia LIU xia ZHAO Juan Medical Examination Center Hebei Province Hospital of Chinese MedicineShijiazhuang(050011)China Department of Gynaecology and Obstetrics Hebei Province Hospital of Chinese MedicineShijiazhuang(050011)China Experimental Center for Teaching Hebei Medical UniversityShijiazhuang(050017)China

Objective: To investigate the effects of asperuloside on cervical cancer based on endoplasmic reticulum(ER) stress and mitochondrial pathway. Methods: Different doses(12.5–800 μg/mL) of asperuloside were used to treat cervical cancer cell lines Hela and CaSki to calculate the half maximal inhibitory concentration(IC_(50)) of asperuloside. The cell proliferation was analyzed by clone formation assay. Cell apoptosis, intracellular reactive oxygen species(ROS) and mitochondrial membrane potential were determined by flow cytometry. The protein expressions of cleaved-caspase-3, Bcl-2, Bax, Cyt-c, cleaved-caspase-4 and glucose-regulated protein 78(GRP78) were analyzed by Western blot. And the inhibitor of ER stress, 4-phenyl butyric acid(4-PBA) was used to treat cervical cancer cells to further verify the role of ER stress in the apoptosis of cervical cancer cells induced by asperuloside. Results: Asperuloside of 325, 650, and 1300 μg/mL significantly inhibited the proliferation and promoted apoptosis of Hela and CaSki cells(P<0.01). All doses of asperuloside significantly increased intracellular ROS levels, reduced mitochondrial membrane potential, significantly reduced Bcl-2 protein expression level, and increased Bax, Cyt-c, GRP78 and cleaved-caspase-4 expressions(P<0.01). In addition, 10 mmol/L 4-PBA treatment significantly promoted cell proliferation and reduced apoptosis(P<0.05), and 650 μg/mL asperuloside could reverse 4-PBA-induced increased cell proliferation, decreased apoptosis and cleaved-caspase-3,-4 and GRP78 protein expressions(P<0.05). Conclusion: Our study revealed the role of asperuloside in cervical cancer, suggesting that asperuloside promotes apoptosis of cervical cancer cells through ER stress-mitochondrial pathway.

关键词： asperuloside Chinese medicine cervical cancer endoplasmic reticulum stress mitochondrial damage apoptosis

Evaluation of the clinical effects of atropine in combination with remifentanil in children undergoing surgery for acute appendicitis

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World Journal of Gastrointestinal Surgery 2024年第7期16卷 2065-2072页

作者： Yu-Juan Li yong-Yan Chen xia-Lan Lin Wei-zhi Zhang Department of Anesthesiology Shanxi Provincial Children’s HospitalTaiyuan 030013Shanxi ProvinceChina

BACKGROUND Acute appendicitis(AA)is the most common cause of acute abdomen in *** significantly influences the surgical treatment of AA in children,making the scientific and effective selection of anesthetics *** To assess the clinical effect of atropine(ATR)in combination with remifentanil(REMI)in children undergoing surgery for *** In total,108 cases of pediatric AA treated between May 2020 and May 2023 were selected,58 of which received ATR+REMI[research group(RG)]and 50 who received REMI[control group(CG)].Comparative analyses were conducted on the time to loss of eyelash reflex,pain resolution time,recovery time from anesthesia,incidence of adverse events(AEs;respiratory depression,hypoxemia,bradycardia,nausea and vomiting,and hypotension),intraoperative responses(head shaking,limb activity,orientation recovery,safe departure time from the operating room),hemodynamic parameters[oxygen saturation(SPO2),mean arterial pressure,heart rate,and respiratory rate],postoperative sedation score(Ramsay score),and pain level[the Face,Legs,Activity,Cry,Consolability(FLACC)Behavioral Scale].RESULTS Compared with the CG,the RG showed significantly shorter time to loss of eyelash reflex,pain resolution,recovery from anesthesia,and safe departure from the operating ***,the incidence rates of overall AEs(head shaking,limb activity,etc.)were lower,and influences on intraoperative hemodynamic parameters and stress response indexes were *** Ramsay score at 30 min after extubation and the FLACC score at 60 min after extubation were significantly lower in the RG than in the *** ATR+REMI is superior to REMI alone in children undergoing AA surgery,with a lower incidence of AEs,fewer influences on hemodynamics and stress responses,and better post-anesthesia recovery.

关键词： Atropine Remifentanil Pediatric acute appendicitis Surgery Clinical efficacy

Highly Thermally Conductive Polydimethylsiloxane Composites with Controllable 3D GO@f-CNTs Networks via Self-sacrificing Template Method

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Chinese Journal of Polymer Science 2024年第7期42卷 897-906,I0005页

作者： Shuang-Shuang Wang Dian-Ying Feng zhi-Ming Zhang xia Liu Kun-Peng Ruan yong-Qiang Guo Jun-Wei Gu Shaanxi Key Laboratory of Macromolecular Science and Technology School of Chemistry and Chemical EngineeringNorthwestern Polytechnical UniversityXi’an710072China Shandong Institute of Nonmetallic Materials Jinan250031China Queen Mary University of London Engineering School Northwestern Polytechnical UniversityXi’an710072China

Constructing controllable thermal conduction networks is the key to efficiently improve thermal conductivities of polymer *** this work,graphite oxide(GO)and functionalized carbon nanotubes(f-CNTs)are combined to prepare“Line-Plane”-like hetero-structured thermally conductive GO@f-CNTs fillers,which are then performed to construct controllable 3D GO@f-CNTs thermal conduction networks via selfsacrificing template method based on oxalic ***,thermally conductive GO@f-CNTs/polydimethylsiloxane(PDMS)composites are fabricated via casting *** the size of oxalic acid is 0.24 mm and the volume fraction of GO@f-CNTs is 60 vol%,GO@f-CNTs/PDMS composites present the optimal thermal conductivity coefficient(λ,4.00 W·m^(-1)·K^(-1)),about 20 times that of theλof neat PDMS(0.20 W·m^(-1)·K^(-1)),also much higher than theλ(2.44 W·m^(-1)·K^(-1))of GO/f-CNTs/PDMS composites with the same amount of randomly dispersed ***,the obtained GO@f-CNTs/PDMS composites have excellent thermal stability,whoseλdeviation is only about 3%after 500 thermal cycles(20-200℃).

关键词： Polydimethylsiloxane Hetero-structured thermally conductive fillers Self-sacrificing template Thermal conduction networks

Numerical simulations for radon migration and exhalation behavior during measuring radon exhalation rate with closed-loop method

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Nuclear Science and Techniques 2024年第1期35卷 81-95页

作者： Ming xia yong-Jun Ye Shu-Yuan Liu School of Resources Environment and Safety Engineering University of South ChinaHengyang 421001China Key Discipline Laboratory for National Defense for Biotechnology in Uranium Mining and Hydrometallurgy University of South ChinaHengyang 421001China

Accurate measurements of the radon exhalation rate help identify and evaluate radon risk regions in the *** these measurement methods,the closed-loop method is frequently ***,traditional experiments are insufficient or cannot analyze the radon migration and exhalation patterns at the gas–solid interface in the accumulation *** CFD-based technique was applied to predict the radon concentration distribution in a limited space,allowing radon accumulation and exhalation inside the chamber intuitively and *** this study,three radon exhalation rates were defined,and two structural ventilation tubes were designed for the *** consistency of the simulated results with the variation in the radon exhalation rate in a previous experiment or analytical solution was *** effects of the vent tube structure and flow rate on the radon uniformity in the chamber;permeability,insertion depth,and flow rate on the radon exhalation rate and the effective diffusion coefficient on back-diffusion were *** on the results,increasing the inser-tion depth from 1 to 5 cm decreased the effective decay constant by 19.55%,whereas the curve-fitted radon exhalation rate decreased(lower than the initial value)as the deviation from the initial value increased by approximately 7%.Increasing the effective diffusion coefficient from 2.77×10^(-7) to 7.77×10^(-6) m^(2) s^(-1) made the deviation expand from 2.14 to 15.96%.The conclusion is that an increased insertion depth helps reduce leakage in the chamber,subject to notable back-diffusion,and that the closed-loop method is reasonably used for porous media with a low effective diffusion coefficient in view of the back-diffusion *** CFD-based simulation is expected to provide guidance for the optimization of the radon exhalation rate measurement method and,thus,the accurate measurement of the radon exhalation rate.

关键词： Radon exhalation Numerical simulation Accumulation chamber

High-Order Two-Scale Asymptotic Paradigm for the Elastodynamic Homogenization of Periodic Composites

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Acta Mechanica Solida Sinica 2024年第1期37卷 124-138页

作者： Wei-zhi Luo Mu He Liang xia Qi-Chang He State Key Laboratory of Intelligent Manufacturing Equipment and Technology Huazhong University of Science and TechnologyWuhan 430074China Laboratoire Modélisation et Simulation Multi-Echelle MSME UMR 8208 CNRSUniversite Gustave Eiffel77454 Marne-la-ValléeFrance

The classical two-scale asymptotic paradigm provides macroscopic and microscopic analyses for the elastodynamic homogenization of periodic composites based on the spatial or/and temporal variable,which offers an approximate framework for the asymptotic homogenization analysis of the motion ***,in this framework,the growing complexity of the homogenization formulation gradually becomes an obstacle as the asymptotic order *** such a context,a compact,fast,and accurate asymptotic paradigm is *** work reviews the high-order spatial two-scale asymptotic paradigm with the effective displacement field representation and optimizes the implementation by symmetrizing the tensor to be ***,the modified implementation gets rid of the excessive memory consumption required for computing the high-order tensor,which is demonstrated by representative one-and two-dimensional *** numerical results show that(1)the contrast of the material parameters between media in composites directly affects the convergence rate of the asymptotic results for the homogenization of periodic composites,(2)the convergence error of the asymptotic results mainly comes from the truncation error of the modified asymptotic homogenized motion equation,and(3)the excessive norm of the normalized wavenumber vector in the two-dimensional inclusion case may lead to a non-convergence of the asymptotic results.

关键词： Composites Homogenization Asymptotic analysis Dynamics Dispersion

Intelligent Reflecting Surface-Aided Secure and Covert Communications

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China Communications 2024年第9期21卷 1-10页

作者： Zhou xiaobo Jiang yong xia Tingting xia Guiyang Shen Tong School of Information and Artificial Intelligence Anhui Agricultural UniversityAnhui 230036China

This work employs intelligent reflecting surface(IRS)to enhance secure and covert communication *** formulate an optimization problem to jointly design both the reflection beamformer at IRS and transmit power at transmitter Alice in order to optimize the achievable secrecy rate at Bob subject to a covertness *** first develop a Dinkelbach-based algorithm to achieve an upper bound performance and a high-quality *** reducing the overhead and computational complexity of the Dinkelbach-based scheme,we further conceive a low-complexity algorithm in which analytical expression for the IRS reflection beamforming is derived at each *** result shows that the devised low-complexity algorithm is able to achieve similar secrecy rate performance as the Dinkelbach-based *** examination also shows that introducing an IRS into the considered system can significantly improve the secure and covert communication performance relative to the scheme without IRS.

关键词： covert communications intelligent reflecting surface physical layer security reflection beamforming