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Clean water generation with switchable dispersion of multifunctional Fe3O4-reduced graphene oxide particles

Progress in Natural Science:Materials International 2018年第4期28卷 422-429页

作者： Ruijie Zhao Jiale Xu peng Tao Fenglei Shi Fan Yu Xiaoliang Zeng Chengyi song Jianbo Wu Wen Shang Tao Deng State Key Laboratory of Metal Matrix Composites School of Materials Science and Engineering Shanghai Jiao Tong University Guangdong Provincial Key Laboratory of Materials for High Density Electronic Packaging Shenzhen Institutes of Advanced Technology Chinese Academy of Sciences

With the increased need for clean water and decreased supply of fresh water, purification of contaminated water can provide clean water that supplements the fresh water from nature. Physical adsorption, photo-degradation and solar-driven evaporation processes are promising ways to generate clean water with minimum environmental impact. However, different purification process requires different dispersion state of the treating agent to maximize its performance. Herein, we demonstrate that Fe3O4-reduced graphene oxide(MrGO) particles with switchable dispersion can be used as the multifunctional water treating agents to efficiently purify contaminated water through different processes. Under homogenously dispersed nanofluid mode, the MrGO particles have large exposed surface areas and can efficiently remove organic dye pollutants through physical adsorption. The uniform dispersion state also favors high contact efficiency facilitating decontamination of high concentration of organic compounds through solar-driven photocatalytic degradation by the MrGO particles. The excellent magnetic response of MrGO particles not only allows for easy collection of the treating agent from water but also enables assembly of MrGO at the air-water interface with external magnets. Under such interfacial assembled mode, clean water can be distilled out of the contaminated solution with high evaporation efficiency of 74.7% under simulated natural solar radiation. This work demonstrates that dispersion state can be used as another important means to optimize water purification performances.

关键词： Adsorption Photo-degradation Evaporation Dispersion state Water treatment

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Antioxidant activity of chito-oligosaccharides on pancreatic islet cells in streptozotocin-induced diabetes in rats

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World Journal of Gastroenterology 2009年第11期15卷 1339-1345页

作者： Wen-peng Yuan Bing Liu Chang-Heng Liu Xiao-Jun Wang Mian-song Zhang Xiu-Mei Meng Xue-Kui Xia Biology Institute of Shandong Academy of Sciences Jinan 250014 ShandongProvince China Chinese Academy of Inspection and Quarantine Beijing 100025 China

AIM:To investigate the antioxidant activity of chitooligosaccharides(COSs)on pancreatic islet cells in diabetic rats induced by streptozotocin. METHODS:The antioxidant effect of COSs on pancreatic islet cells was detected under optical microscopy and with colorimetric assay and gel *** activities of glutathione peroxidase and superoxide dismutase,total antioxidant capacity,and content of malondialdehyde in serum and tissue slices of pancreas were examined after 60 d to determine the effect of COSs in streptozotocin-induced diabetes in rats. RESULTS:COSs can prohibit the apoptosis of pancreatic islet *** concentrations of COSs can improve the capability of total antioxidant capacity and activity of superoxide dismutase and decrease the content of malondialdehyde *** investigation in the pancreas showed that COSs have resulted in the reduction of islets,loss of pancreatic cells,and nuclear pyknosis of pancreatic cells. CONCLUSION:COSs possess various biological activities and can be used in the treatment of diabetes mellitus.

关键词： Chito-oligosaccharides Diabetes mellitus Apoptosis Antioxidant ability Pancreastic islet cells Streptozotocin

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基于声音信号的离心泵轴承故障预警研究

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天然气与石油 2024年第2期42卷 103-108页

作者：杨俊穆伯锋张敏詹蕊菱马谧郑通明梁陶孙德彬彭松中国石油西南油气田公司川西北气矿四川江油621700

为了对离心泵运行状态进行监测,通过采集离心泵运转声音信号,对离心泵声音信号进行时域分析、频域分析,提取时频域轴承故障预警特征。利用变分模态分解方法,筛选合适的本征模态函数进行包络调解,通过包络谱图分析离心泵轴承故障特征信息... 详细信息

为了对离心泵运行状态进行监测,通过采集离心泵运转声音信号,对离心泵声音信号进行时域分析、频域分析,提取时频域轴承故障预警特征。利用变分模态分解方法,筛选合适的本征模态函数进行包络调解,通过包络谱图分析离心泵轴承故障特征信息,提取离心泵轴承故障预警特征。针对离心泵轴承故障预警,从中提取正常运行和轴承故障运行特征参数,建立预警特征,进而实现对离心泵维护和保养的预警,提高离心泵使用寿命,避免离心泵轴承故障。研究结果对离心泵轴承故障预警具有指导意义。

关键词：离心泵声音信号时频域分析变分模态分解预警特征

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Pictet-Spengler condensation reactions catalyzed by a recyclable H^+-montmorillonite as a heterogeneous BrΦnsted acid

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Science China Chemistry 2010年第3期53卷 561-567页

作者： WANG YuFeng,song ZhanBo,CHEN ChunXia & peng Jinsong Department of Chemistry and Chemical Engineering,College of Science,Northeast Forestry University,Harbin 150040,China Department of Chemistry and Chemical Engineering College of Science Northeast Forestry University Harbin China

Catalytic performance of different cation-exchanged montmorillonite clays has been investigated in the Pictet-Spengler C-C bond forming reaction.H+-Montmorillonite was found to be a very efficient and reusable catalyst for the endo cyclization of β-phenylethylamine derivatives with aldehydes under solvent-free *** addition,an aqueous condensation version for the synthesis of tetrahydro-β-carbolines using the H+-montmorillonite catalyst has been *** these environmentally friendly processes,the use of organic solvents was avoided and the catalyst was recycled with maintenance of high catalytic activity.

关键词： heterogeneous catalysis catalyst recycling mesoporous materials green synthesis

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Association between anti-Müllerian hormone concentrations and sperm retrieval outcomes in patients with idiopathic nonobstructive azoospermia:a systematic review and meta-analysis

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Asian Journal of Andrology 2024年第5期26卷 522-527页

作者： Hong Xiao Yi-Lang Ding peng Yang Qiang Chen Hai-Lin Huang Xi Chen Hui-Liang Zhou song-Xi Tang Department of Andrology and Sexual Medicine First Affiliated Hospital of Fujian Medical UniversityFuzhou 350005China

Microdissection testicular sperm extraction(mTESE)is commonly performed to retrieve sperm in the testes for assisted reproductive techniques in patients with idiopathic nonobstructive azoospermia(iNOA).However,the success rate of sperm retrieval varies among *** aim to investigate the association between clinical parameters and sperm retrieval outcomes in patients with *** searched PubMed,EMBASE,and Web of Science from database inception to August 2,*** main measure was whether sperm retrieval was successful in patients with iNOA who underwent *** estimates of the sperm retrieval rate and weighted mean differences were calculated using random-effects *** overall sperm retrieval rate was 36.8%(95%confidence interval[CI]:27.5%-46.0%,I 2=95.0%)in nine studies comprising 1892 patients with *** significant differences were found in age,testicular volume,serum total testosterone concentrations,or inhibin B concentrations between positive and negative sperm retrieval *** anti-Müllerian hormone concentrations in patients with iNOA were associated with a positive outcome of mTESE(weighted mean differences:−2.70;95%CI:−3.94-−1.46,I 2=79.0%).In conclusion,this study shows a significant relationship between anti-Müllerian hormone and sperm retrieval outcomes in patients with iNOA,while age,testicular volume,total testosterone,and inhibin B show no significant *** findings have important implications for assessing the potential success of sperm retrieval and selecting appropriate treatment strategies in patients with iNOA.

关键词： anti-Müllerian hormone idiopathic nonobstructive azoospermia male infertility meta-analysis sperm retrieval

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Triggering Receptor Expressed on Myeloid Cells 2 Alleviated Sevoflurane-Induced Developmental Neurotoxicity via Microglial Pruning of Dendritic Spines in the CA1 Region of the Hippocampus

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Neuroscience Bulletin 2024年第9期40卷 1215-1229页

作者： Li Deng Shao-Yong song Wei-Ming Zhao Xiao-Wen Meng Hong Liu Qing Zheng Ke peng Fu-Hai Ji Department of Anaesthesiology The First Affiliated Hospital of Soochow UniversitySuzhou215006China Institute of Anaesthesiology Soochow UniversitySuzhou215006China Department of Anaesthesiology Dushu Lake Hospital Affiliated of Soochow UniversitySuzhou215000China Department of Anaesthesiology and Pain Medicine University of California Davis HealthSacramentoCAUSA Center for Molecular Imaging and Nuclear Medicine Collaborative Innovation Center of Radiation Medicine of Jiangsu Higher EducationState Key Laboratory of Radiation Medicine and ProtectionSchool for Radiological and Interdisciplinary Sciences(RAD-X)Suzhou Medical College of Soochow UniversitySuzhou215006China

Sevoflurane induces developmental neurotoxicity in mice;however,the underlying mechanisms remain *** receptor expressed on myeloid cells 2(TREM2)is essential for microglia-mediated synaptic refinement during the early stages of brain *** explored the effects of TREM2 on dendritic spine pruning during sevoflurane-induced developmental neurotoxicity in *** were anaesthetized with sevoflurane on postnatal days 6,8,and *** performance was assessed using the open field test and Morris water maze *** knockdown of TREM2 and overexpression of TREM2 by stereotaxic injection were used for mechanistic *** blotting,immunofluorescence,electron microscopy,three-dimensional reconstruction,Golgi staining,and whole-cell patch-clamp recordings were *** exposures upregulated the protein expression of TREM2,increased microglia-mediated pruning of dendritic spines,and reduced synaptic multiplicity and excitability of CA1 ***2 genetic knockdown significantly decreased dendritic spine pruning,and partially aggravated neuronal morphological abnormalities and cognitive impairments in sevoflurane-treated *** contrast,TREM2 overexpression enhanced microglia-mediated pruning of dendritic spines and rescued neuronal morphological abnormalities and cognitive ***2 exerts a protective role against neurocognitive impairments in mice after neonatal exposures to sevoflurane by enhancing microglia-mediated pruning of dendritic spines in CA1 *** provides a potential therapeutic target in the prevention of sevoflurane-induced developmental neurotoxicity.

关键词： CA1 neurons Dendritic spines Developmental neurotoxicity Microglia Sevoflurane TREM2

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Identification of a Low-spin Isomer in ^(176)Ir

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近代物理研究所和兰州重离子加速器实验室年报：英文版 2005年第1期 48-48页

作者： Wang Hualei, Zhang Yuhu, Zhou Xiaohong, Guo Yingxiang, Lei Xiangguo, Xu Shuwei Xie Yuanxiang,Liu Minliang, Zheng Yong, Xing Yebing, Xie Chengying, song Litao Lou peng, Yu Haiping, Guo Wentao,Ding Huajie and Niu Yanning

Theβ+/EC decay of doubly odd 176Ir has been studied via the 146Nd(35Cl,5nγ) heavy ion fusion evaporation reaction at the Sector-Focusing Cyclotron (SFC) accelerator in the Institute of Modern Physics (IMP), Lanzhou.... 详细信息

关键词：异构体兰州重离子加速器近代物理研究所回旋加速器鉴定自旋熔合蒸发反应中国科学院

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Energy loss of degrader in SC200 proton therapy facility

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Nuclear Science and Techniques 2019年第1期30卷 11-18页

作者： Feng Jiang Yun-Tao song Jin-Xing Zheng Xian-Hu Zeng peng-Yu Wang Jun-Sheng Zhang Wu-Quan Zhang Institute of Plasma Physics Chinese Academy of Sciences University of Science and Technology of China

The proton beam energy determines the range of particles and thus where the dose is deposited. According to the depth of tumors, an energy degrader is needed to modulate the proton beam energy in proton therapy facilities based on cyclotrons, because the energy of beam extracted from the cyclotron is fixed. The energy loss was simulated for the graphite degrader used in the beamline at the superconducting cyclotron of 200 MeV in Hefei(SC200). After adjusting the mean excitation energy of the graphite used in the degrader to 76 eV, we observed an accurate match between the simulations and *** also simulated the energy spread of the degraded beam and the transmission of the degrader using theoretical formulae. The results agree well with the Monte Carlo simulation.

关键词： Degrader Energy loss Mean excitation energy Energy spread Transmission

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Bumetanide promotes neural precursor cell regeneration and dendritic development in the hippocampal dentate gyrus in the chronic stage of cerebral ischemia

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Neural Regeneration Research 2016年第5期11卷 745-751页

作者： Wang-shu Xu Xuan Sun Cheng-guang song Xiao-peng Mu Wen-ping Ma Xing-hu Zhang Chuan-sheng Zhao Department of Neurology First Affiliated Hospital of China Medical University Neuroinfection and Neuroimmunology Center Department of Neurology Beijing Tiantan Hospital Capital Medical University Department of Interventional Neuroradiology Beijing Tiantan Hospital Capital Medical University Department of Neurology Benxi Central Hospital of China Medical University Department of Medical Genetics School of Basic Medicine Peking University

Bumetanide has been shown to lessen cerebral edema and reduce the infarct area in the acute stage of cerebral ischemia. Few studies focus on the effects of bumetanide on neuroprotection and neurogenesis in the chronic stage of cerebral ischemia. We established a rat model of cerebral ischemia by injecting endothelin-1 in the left cortical motor area and left corpus striatum. Seven days later, bumetanide 200 μg/kg/day was injected into the lateral ventricle for 21 consecutive days with a mini-osmotic pump. Results demonstrated that the number of neuroblasts cells and the total length of dendrites increased, escape latency reduced, and the number of platform crossings increased in the rat hippocampal dentate gyrus in the chronic stage of cerebral ischemia. These findings suggest that bumetanide promoted neural precursor cell regeneration, dendritic development and the recovery of cognitive function, and protected brain tissue in the chronic stage of ischemia.

关键词： nerve regeneration cerebral ischemia bumetanide Na+-K+-2Cl- cotransporter 1 hippocampal dentate gyrus neurogenesis neuralprecursor cells dendritic development cognitive function neural regeneration

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Polyphenolic Compound and the Degree of Browning in Processing Apple Varieties

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Agricultural Sciences in China 2007年第5期6卷 607-612页

作者： song Ye YAO Yu-xin ZHAI Heng DU Yuan-peng CHEN Feng WEI Shu-wei College of Horticulture Science and Engineering Shandong Agricultural University Taian 271018 P.R.China Jinan Fruit Research Institute All China Federation of Supply and Marketing Cooperatives Jinan 250014 P.R. China State Key Laboratory of Crop Biology Shandong Agricultural University Taian 271018 P.R. China

Polyphenolic compound in processing apple （Malus domestica Borkh.） varieties and the relationship between polyphenol content and enzymatic browning were studied to provide reference for raw material selection and processing method optimization. The content of polyphenol compound in 10 processing apple varieties （4 cider and 6 juice varieties） were analyzed using the Folin-Ciocalteu method and HPLC. The degree of browning and the activities of polyphenol oxidase were also studied. The content and proportion of the polyphenol varied depending on the variety. Bitter varieties globally showed a higher polyphenol concentration than sweet or acid varieties. Proanthocyanidins, chlorogenic acid, （＋）-catechin, （-）-epicatechin were high-concentrated polyphenols in apple fruits. Phloridzin, the unique polyphenol of apple, was abundant in the bitter variety Frequin rouge fruit. Total polyphenols, proanthocyanidins, （＋）-catechin, and phloridzin had higher correlations with browning. The correlation was low between chlorogenic acid and browning. The polyphenolic profiles were correlated with the apple types. Cider apples contained more polyphenol than juice apple varieties. The content of flavan-3-ol has a close relationship with fruit browning.

关键词： apple processing varieties polyphenolic compounds browning polyphenol oxidase

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