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Interface associativity and energy absorption capability of anti-vibration porous Al-MM alloy core with iron alloy skin structures

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Journal of Iron and Steel Research International 2017年第7期24卷 730-736页

作者： Xu Ran hong-wei sun Li-dong Wang Yao-ming Wu School of Materials Science and Engineering Changchun University of Technology State Key Laboratory of Rare Earth Resource Utilization Changchun Institute of Applied ChemistryCAS

The interface associativity and energy absorption capability of composite structure with anti-vibration porous Al-MM（cerium-rich mischmetal）alloy core and iron alloy skin were *** aluminum core/iron alloy skin structures were fabricated considering an iron alloy tube as its shell and closed-cell porous Al-MM alloy as its core.A peeling experiment was carried out to calculate the capacity of interfacial bonding and a compression test was carried out to determine the energy absorption *** results showed that the addition of MM significantly enhanced both the interfacial bonding and the energy absorption capacity.

关键词： Porous Al-MM alloy xpanded perlite Interface associativity Energy absorption

Semiunitary Transforrnation and Isospectral Hamiltonians in Arbitrary Dimensional Space

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Communications in Theoretical Physics 2001年第7期36卷 25-28页

作者： RUAN Dong WANG Xue-Jin HUANG wei-Cheng sun hong-Zhou Department of Physics Tsinghua University Beijing 100084 China The Key Laboratory of Quantum Information and Measurements of MOE Tsinghua University Beijing 100084 China Center of Theoretical Nuclear Physics National Laboratory of Heavy Ion Accelerator Lanzhou 730000 China Department of Electronic Engineering Tsinghua University Beijing 100084 China The Key Laboratory of Quantum Information and Measurements of MOE Tsinghua University Beijing 100084 China Institute of Applied Chemistry Xinjiang University Urumqi 830046 China Department of Physics Tsinghua University Beijing 100084 China Center of Theoretical Nuclear Physics National Laboratory of Heavy Ion Accelerator Lanzhou 730000 China

By means of the complex Clifford algebra, a new realization of multi-dimensional semiunitary transformation is put forward and then applied to studying the isospectrality of nonrelativistic Hamiltonians of multi-dimensional quantum mechanical systems, in which the generalized Pauli coupling interaction and spin-orbit coupling interaction appear naturally. Moreover, it is shown that the semiunitary operators, together with the Hamiltonian of quantum mechanical system, satisfy the polynomially-deformed angular momentum algebra.

关键词： semiunitary transformation, action-angle approach, isospectrality of Hamiltonians, deformed angular momentum algebra

Reduction of methylviologen-mediated oxidative stress tolerance in antisense transgenic tobacco seedlings through restricted expression of StAPX

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Journal of Zhejiang University-Science B(Biomedicine & Biotechnology) 2013年第7期14卷 578-585页

作者： wei-hong sun Yong WANG Hua-gang HE Xue LI Wan SONG Bin DU Qing-wei MENG College of Food and Biological Engineering Jiangsu University State Key Laboratory of Crop Biology College of Life Science Shandong Agricultural University

Ascorbate peroxidases are directly involved in reactive oxygen species (ROS) scavenging by reducing hydrogen peroxide to water. The tomato thylakoid-bound ascorbate peroxidase gene (StAPX) was introduced into tobacco. RNA gel blot analysis confirmed that StAPX in tomato leaves was induced by methylviologen-mediated oxidative stress. The sense transgenic seedlings exhibited higher tAPX activity than that of the wild type (WT) plants under oxidative stress conditions, while the antisense seedlings exhibited lower tAPX activity. Lower APX activities of antisense transgenic seedlings caused higher malondialdehyde contents and relative electrical conductivity. The sense transgenic seedlings with higher tAPX activity maintained higher chlorophyll content and showed the importance of tAPX in maintaining the optimal chloroplast development under methylviologen stress conditions, whereas the antisense lines maintained lower chlorophyll content than WT seedlings. Results indicated that the over-expression of StAPX enhanced tolerance to methylviologen-mediated oxidative stress in sense transgenic to- bacco early seedlings, whereas the suppression of StAPX in antisense transgenic seedlings showed high sensitivity to oxidative stress.

关键词： Methylviologen Oxidative stress StAPX Stress tolerance Transgenic tobacco seedling

Contrast-enhanced computed tomography findings of a huge perianal epidermoid cyst: A case report

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World Journal of Clinical Cases 2019年第22期7卷 3778-3783页

作者： Pei-Ming sun He-Ming Yang Yan Zhao Jian-Wu Yang hong-Feng Yan Jing-Xin Liu hong-wei sun Yan Cui Department of General Surgery PLA Strategic Support Force Characteristic Medical Center

BACKGROUND Epidermoid cysts can be found at any location in the human ***,perianal epidermoid cysts are extremely rare and only a few cases have been *** far as we know,there is no special literature on the value of contrast-enhanced computed tomography(CT)for the diagnosis of perianal epidermoid *** SUMMARY A 60-year-old male patient presented to the department of general surgery of PLA Strategic Support Force Characteristic Medical Center with the chief complaint of a mass in the perianal region gradually expanding for more than 30 years and perianal discomfort upon sitting for a preceding period of 2 *** examination revealed a painless mass in the left perianal ***-enhanced CT was used for preoperative *** patient was treated by total mass excision under epidural *** pathological examination revealed the presence of a perianal epidermoid *** patient showed a satisfactory recovery during the 6-month follow-up *** Contrast-enhanced CT may be a beneficial,useful,and convenient approach for assistance for preoperative diagnosis and surgical decision-making for patients with perianal epidermoid cysts.

关键词： Epidermoid cyst Perianal Contrast-enhanced computed tomography Casereport General surgery Preoperative diagnosis

Significantly Enhanced Melt Memory Effect of Metallocene-made Isotactic Polypropylene Containing Talc

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Chinese Journal of Polymer Science 2024年第2期42卷 213-222,I0008页

作者： hong-Wen sun Fu-Shan Wang Yan Gao Fu-Qing wei Jia-Chun Feng State Key Laboratory of Molecular Engineering of Polymers Department of Macromolecular ScienceFudan UniversityShanghai200433China Lanzhou Petrochemical Corporation of PetroChina Lanzhou730060China Lanzhou Petrochemical Research Center Petrochemical Research Institute of PetroChinaLanzhou730060China

The melt memory effect is a widely observed phenomenon in semi-crystalline polymers. In practical applications, various additives are usually introduced into polymers, which may affect their melt memory behavior. In this work, the effect of talc on the melt memory effect of metallocene-made isotactic polypropylene(M-PP) was investigated in detail by using the differential scanning calorimetry. The results indicated that the introduction of talc significantly strengthened the melt memory effect of M-PP. Specifically, the upper limit temperature of Domain II increased from 161 ℃ to 174 ℃, resulting in a substantial widening of the temperature range of Domain IIa from 1 ℃ to 14 ℃. Analysis of the crystal orientation of the M-PP containing talc cooled from various Ts suggested that the remarkably enhanced melt memory effect could be ascribed to the stabilization of oriented nuclei facilitated by talc. This stabilizing effect was likely attributable to the prefreezing effect or the sorption interaction between talc and the M-PP chains.

关键词： Metallocene-made isotactic polypropylene Talc Melt memory effect Crystal orientation

Environmental characteristics of trace metals in seawater from the Ninety East Ridge in the Indian Ocean

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Journal of Oceanology and Limnology 2024年第4期42卷 1119-1129页

作者： Jingxi LI Di ZHANG Fenghua JIANG hong CHEN wei CAO Chengjun sun Key Laboratory of Marine Eco-Environmental Science and Technology First Institute of OceanographyMinistry of Natural ResourcesQingdao 266061China College of Safety and Environmental Engineering Shandong University of Science and TechnologyQingdao 266590China Laoshan Laboratory of Marine Science and Technology Laboratory of Marine Drugs and Biological ProductsQingdao 266071China

The Ninety East Ridge in the Indian Ocean has complex and unique *** concentrations and distribution characteristics of 10 trace metals(V,Cr,Mn,Fe,Co,Ni,Cu,Cd,Pb,and U)in seawater from the Ninety East Ridge in the Indian Ocean were *** show that the average concentrations of different trace metals in all the collected seawater samples were 1.134μg/L for V,0.158μg/L for Cr,0.489μg/L for Mn,0.427μg/L for Fe,0.011μg/L for Co,0.395μg/L for Ni,0.403μg/L for Cu,0.097μg/L for Cd,0.139μg/L for Pb,and 3.470μg/L for *** in the horizontal and vertical distributions of all measured trace metals were revealed,and the occurrence of high concentrations was *** addition,the significant differences in the concentration distribution of different trace metals in seawater on both sides of the Ninety East Ridge present regional segmentation in the area for various trace metals in deep sea *** study provided basic data for future investigations on the environmental and ecological impact of trace metals in the Indian Ocean and the potential water mass transport mechanism.

关键词： trace metal environmental characteristic Ninety East Ridge seawater Indian Ocean

Long non-coding RNA MEG3 regulates autophagy after cerebral ischemia/reperfusion injury

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Neural Regeneration Research 2022年第4期17卷 824-831页

作者： Tian-Hao Li hong-wei sun Lai-Jun Song Bo Yang Peng Zhang Dong-Ming Yan Xian-Zhi Liu Yu-Ru Luo Department of Neurosurgery The First Affiliated Hospital of Zhengzhou UniversityZhengzhouHenan ProvinceChina

Severe cerebral ischemia/reperfusion injury has been shown to induce high-level autophagy and neuronal ***,it is extremely important to search for a target that inhibits autophagy *** non-coding RNA MEG3 participates in ***,it remains unclear whether it can be targeted to regulate cerebral ischemia/reperfusion *** results revealed that in oxygen and glucose deprivation/reoxygenation-treated HT22 cells,MEG3 expression was obviously upregulated,and autophagy was increased,while knockdown of MEG3 expression greatly reduced ***,MEG3 bound mi R-181 c-5 p and inhibited its expression,while mi R-181 c-5 p bound to autophagy-related gene ATG7 and inhibited its *** experiments revealed that mir-181 c-5 p overexpression reversed the effect of MEG3 on autophagy and ATG7 expression in HT22 cells subjected to oxygen and glucose deprivation/*** vivo experiments revealed that MEG3 knockdown suppressed autophagy,infarct volume and behavioral deficits in cerebral ischemia/reperfusion *** findings suggest that MEG3 knockdown inhibited autophagy and alleviated cerebral ischemia/reperfusion injury through the mi R-181 c-5 p/ATG7 signaling ***,MEG3 can be considered as an intervention target for the treatment of cerebral ischemia/reperfusion *** study was approved by the Animal Ethics Committee of the First Affiliated Hospital of Zhengzhou University,China(approval ***20190538)on January 4,2019.

关键词： ATG7 autophagy cerebral infarction cerebral ischemia/reperfusion injury long non-coding RNA miR-181c-5p neuron oxygen and glucose deprivation/reoxygenation

Characteristics of B,Zn and Se in stream sediments of Tanzania and their agricultural applications:Based on 1∶1000000 geochemical survey

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China Geology 2023年第1期6卷 1-14页

作者： Kang-kang Xu hong-wei sun wei Xie Fu-qing He Xiao-yang Liu Kai sun Sheng-fei He Xing-yuan Wu Peng-hui Gong Godfrey Machumu Southern African Mining Research Institute China Geological SurveyTianjin 300170China North China Center of Geoscience Innovation Tianjin 300170China Tianjin Geological Mineral Testing Center Tianjin 300191China Geological Survey of Tanzania DodomaP.O Box 903Tanzania

Tanzania is located in eastern Africa with a predominantly agricultural ecomomy,the potential for developing and utilizing cultivated land are promising,but scientific guidance is required.B,Zn and Se are essential micronutrients for plants and human body with crucial biological functions,in particular,Se is significant for human health and considered as“the king of anti-cancer”.As these elements required by human or plants are mainly absorbed from soil directly or indirectly,therefore,it is important to understand the contents and distributions of them in the soil of cultivated land for guiding agricultural *** this work,low-density geochemical survey at the scale of 1∶1000000 was carried out in Tanzania,and the results show that the concentrations of B,Zn and Se in stream sediments are low and their distributions are *** to the distributions of geological units,the existing cultivated land resources can be divided into five regions in *** with the national background values,the concentrations of B,Zn and Se are insufficient overall but enriched locally in these *** general,element concentrations in stream sediments and soil have a positive correlation because of their similar sources,which is essential in agriculture *** on the information provided by low-density geochemical data and maps,the Se-sufficient and Se-rich regions were delineated in Tanzania,where can be used to develop Se-rich ***,this paper believes that geochemical survey is a powerful tool for cultivated land evaluation,agriculture management and land development.

关键词： Stream sediment Low-density geochemical survey Geochemical map Soil of cultivated land Agricultural applications Agricultural geological survey engineering Tanzania Selenium-rich agricultural products

Low Selenium and Low Protein Exacerbate Myocardial Damage in Keshan Disease by Affecting the PINK1/Parkin-mediated Mitochondrial Autophagy Pathway

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Current Medical Science 2024年第1期44卷 93-101页

作者： Li-wei ZHANG hong-qi FENG Song-bo FU Dian-jun sun Center for Endemic Disease Control Chinese Center for Disease Control and PreventionHarbin Medical UniversityNHC Key Laboratory of Etiology and Epidemiology(Harbin Medical University)Key Lab of Etiology and EpidemiologyEducation Bureau of Heilongjiang ProvinceHarbin 150086China

Objective Keshan disease(KD)is a myocardial mitochondrial disease closely related to insufficient selenium(Se)and protein *** induced putative kinase 1(PINK1)/Parkin mediated mitochondrial autophagy regulates various physiological and pathological processes in the *** study aimed to elucidate the relationship between PINK1/Parkin-regulated mitochondrial autophagy and KD-related myocardial *** A low Se and low protein animal model was *** hundred Wistar rats were randomly divided into 5 groups(control group,low Se group,low protein group,low Se+low protein group,and corn from KD area group).The JC-1 method was used to detect the mitochondrial membrane potential(MMP).ELISA was used to detect serum creatine kinase MB(CK-MB),cardiac troponin I(cTnI),and mitochondrial-glutamicoxalacetic transaminase(M-GOT)***-PCR and Western blot analysis were used to detect the expression of PINK1,Parkin,sequestome 1(P62),and microtubule-associated proteins1A/1B light chain 3B(MAP1LC3B).Results The MMP was significantly decreased and the activity of CK-MB,cTnI,and M-GOT significantly increased in each experimental group(low Se group,low protein group,low Se+low protein group and corn from KD area group)compared with the control group(P<0.05 for all).The mRNA and protein expression levels of PINK1,Parkin and MAP1LC3B were profoundly increased,and those of P62 markedly decreased in the experimental groups compared with the control group(P<0.05 for all).Conclusion Low Se and low protein levels exacerbate myocardial damage in KD by affecting the PINK1/Parkin-mediated mitochondrial autophagy pathway.

关键词： Keshan disease low selenium and low protein myocardial mitochondrial injury PTEN induced putative kinase 1(PINK1)/Parkin mitochondrial autophagy