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Lightweight,Flexible Cellulose-Derived Carbon Aerogel@Reduced Graphene Oxide/PDMS Composites with Outstanding EMI Shielding Performances and Excellent Thermal Conductivities

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Nano-Micro Letters 2021年第6期13卷 126-142页

作者： ping Song Bei Liu Chaobo Liang Kunpeng ruan Hua Qiu Zhonglei Ma Yongqiang Guo Junwei Gu MOE Key Laboratory of Material Physics and Chemistry under Extraordinary Conditions Shaanxi Key Laboratory of Macromolecular Science and TechnologySchool of Chemistry and Chemical EngineeringNorthwestern Polytechnical UniversityXi’an 710072P.R.China Xi’an ESWIN Silicon Wafer Technology Co.Ltd Xi’an 710100P.R.China

In order to ensure the operational reliability and infor-mation security of sophisticated electronic components and to protect human health,efficient electromagnetic interference(EMI)shielding materials are required to attenuate electromagnetic wave *** this work,the cellulose solution is obtained by dissolving cotton through hydrogen bond driving self-assembly using sodium hydroxide(NaOH)/urea solution,and cellulose aerogels(CA)are prepared by gelation and ***,the cellulose carbon aerogel@reduced graphene oxide aerogels(CCA@rGO)are prepared by vacuum impregnation,freeze-drying followed by thermal annealing,and finally,the CCA@rGO/polydimethylsiloxane(PDMS)EMI shielding composites are prepared by backfilling with *** to skin-core structure of CCA@rGO,the complete three-dimensional(3D)double-layer con-ductive network can be successfully *** the loading of CCA@rGO is 3.05 wt%,CCA@rGO/PDMS EMI shielding composites have an excellent EMI shielding effectiveness(EMI SE)of 51 dB,which is 3.9 times higher than that of the co-blended CCA/rGO/PDMS EMI shielding composites(13 dB)with the same loading of *** this time,the CCA@rGO/PDMS EMI shielding composites have excellent thermal stability(T_(HRI) of 178.3℃)and good thermal conductivity coefficient(λ of 0.65 W m^(-1) K^(-1)).Excellent comprehensive performance makes CCA@rGO/PDMS EMI shielding composites great prospect for applications in lightweight,flexible EMI shielding composites.

关键词： Polydimethylsiloxane Electromagnetic interference shielding Cellulose carbon aerogel Reduced graphene oxide

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Molecule aging induced by electron attacking

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Journal of Energy Chemistry 2024年第6期93卷 519-525,I0013页

作者： ping Song Yining Dong Xue Gong Mingbo ruan Baoxin Ni Xuanhao Mei Kun Jiang Weilin Xu State Key Laboratory of Electroanalytical Chemistry and Jilin Province Key Laboratory of Low Carbon Chemical Power Changchun Institute of Applied ChemistryChinese Academy of SciencesChangchun 130022JilinChina School of Applied Chemistry and Engineering University of Science and Technology of Chin1Hefei 230026AnhuiChina Shanghai Key Laboratory of Molecular Catalysis and Innovative Materials Collaborative Innovation Center of Chemistry for Energy MaterialsDepartment of ChemistryFudan UniversityShanghai 200438China

Here we propose a new concept of"molecule aging":with some special treatment,a molecule could be"aged"by losing some unknown tiny particles or pieces from atoms in the molecule,Such"aging"or loss of unknown tiny particles does not change apparently its molecular structure or chemical composition,but some physicochemical properties could be changed *** further confirm such"molecule aging"via a long-term electron attacking to age water(H_(2)O)*** IR spectra show no structural difference between the fresh water and the aged one,while the NMR spectra show that the electron attacking can decrease the size of water *** facts indicate that the electron attacking indeed can"affect"the structure of water molecule slightly but without damaging to its basic molecule *** exploration reveals that the hydrogen evolution reaction(HER)activity of the aged water molecule is lower than the fresh water on the same Pt/C *** density functional theory calculations indicate that the shortened O-H bond in H_(2)O indeed can present lower HER activity,so the observed size decrease of water clusters from NMR probably could be attributed to the shortening of O-H bond in water *** results indicate significantly that the molecule aging can produce materials with new functions for new possible applications.

关键词： Aging of molecules Electron attacking Full width at half maxima Hydrogen evolution reaction

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Occupational Radiation Exposure and Changes in Thyroid Hormones in a Cohort of Chinese Medical Radiation Workers

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Biomedical and Environmental Sciences 2021年第4期34卷 282-289页

作者： GUO Qi Shan ruan ping HUANG Wei Xu HUANG Dai Zheng QIU Jia Chu School of Public Health Guangdong Pharmaceutical UniversityGuangzhou 510310GuangdongChina Guangdong Province Engineering&Technology Research Center for Medical 3D Printer and Personalized Medicine Guangzhou 510006GuangdongChina Department of Biomedical Engineering Guangdong Pharmaceutical UniversityGuangzhou 510006GuangdongChina Guangdong Prevention and Treatment Center for Occupational Disease Guangzhou 510300GuangdongChina Department of Biomedical Engineering Guangxi Medical UniversityNanning 530021GuangxiChina

Objective This study aimed to evaluate the association between occupational radiation exposure and changes in thyroid hormone levels among medical radiation *** This retrospective cohort study included 2,946 radiation workers from 20 Guangzhou *** on general characteristics,participant radiation dosimetry,and thyroid function test results[thyroid-stimulating hormone(TSH),triiodothyronine(T3),and thyroid hormone(T4)]were extracted from dosimetry and medical *** generalized estimating equation was used to evaluate the trend of changes in thyroid hormone levels over time and was adjusted for age,gender,and *** The average annual effective dose was very low and showed a general downward *** the follow-up period,changes in T3 and T4 levels among radiation workers were-0.015[95% confidence interval(CI)-0.018 to-0.012]nmol/L per year and-2.294(95%CI-2.426 to-2.162)nmol/L per year,*** hormone levels were significantly different between males and females.T3 levels in the group of upper quartile of dose were significantly higher than in the lower quartile group(P=0.006).No significant decreased trend in thyroid hormone levels was observed with increasing average effective *** Thyroid hormone secretion might be affected even in low-dose radiation exposure environments.

关键词： Occupational radiation Thyroid function Cohort

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A new alkylene dihydrofuran glycoside with antioxidation activity from the root bark of Morus alba L.

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Chinese Chemical Letters 2010年第7期21卷 821-823页

作者： Wei Fu Yong Fang Lei ya Ling Cai Dao Nian Zhou Jin Lan ruan Key Laboratory of Natural Medicinal Chemistry and Resource Evaluation of Hubei Province College of Pharmacy Tongji Medical CenterHuazhong University of Science and TechnologyWuhan 430030China.

A new alkylene dihydrofuran glycoside（1） was isolated from the root bark ofMorus alba L.,along with moracin M-3′-O-β-D-glucopyranoside （2）,and moracin M-6,3′-di-O-β-D-glucopyranoside（3）.Compound 1 was identified as 2-methylene-3-methoxy-2, 5-dihydrofuran-4-O-β-D-glucopyranoside on the basis of chemical and spectroscopic data including 1D and 2D NMR spectral *** addition,the antioxidant activity of 1 was evaluated using the 1,1-diphenyl-2-picrylhydrazyl（DPPH） and 2,2′-azinobis- 3-ethylbenzothiazoline-6-sulphonic acid（ABTS） *** IC_（50） values were 2.49 and 0.45 mg/mL,respectively.

关键词： Morus alba L. Dihydrofuran glycoside Spectral analysis Antioxidation activity

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Pyrite oxidation in column at controlled redox potential of 900 mV with and without bacteria

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Rare Metals 2022年第12期41卷 4279-4288页

作者： He-Yun Sun Qiao-Yi Tan yan Jia Rong-Bo Shu Shui-ping Zhong Ren-Man ruan State Key Laboratory of Biochemical Engineering Institute of Process EngineeringChinese Academy of ScienceBejing 100190China Key Laboratory of Green Process and Engineering Institute of Process EngineeringChinese Academy of ScienceBejing 100190China National Engineering Laboratory for Hydrometallurgical Cleaner Production Technology Institute of Process EngineeringChinese Academy of ScienceBeijing 100190China Institute of Multipurpose Utilization of Mineral Resources Chinese Academy of Geological SciencesChengdu 610041China State Key Laboratory of Gold Extraction Zijin Mining Group Co.Ltd.Shanghang 364200China

Comparisons on the bioleaching and sterile oxidation of pyrite were performed at controlled redox potential of 900 mV(***) and different temperatures of 30 and 60℃.For sterile experiments,the redox potential of irrigation solution was controlled by adding hydrogen peroxide solution(15 wt%),while the redox potential of irrigation solution for bioleaching was elevated by flowing through the packed bed in which bacteria were activated and *** rate of pyrite bioleaching is faster than that of sterile oxidation at temperature of 30℃.The reason is that the potential gradient of leaching solution in bioleaching column is much smaller than that in sterile *** redox potentials of irrigation solution and leaching solution are similar for bioleaching;however,the redox potential difference of irrigation solution and leaching solution for sterile oxidation is about 150 *** temperature increases to 60℃ for sterile oxidation,the rate of pyrite leaching is faster than that of bioleaching at temperature of 30℃,even though the redox potential gradient of leaching solution is *** mineralogy analyses of pyrite residue were performed by scanning electron microscopy-energy-dispersive spectroscopy(SEM-EDS),X-ray diffraction(XRD) and X-ray photoelectron spectroscopy(XPS) *** results confirm that pyrite oxidation might only occur at specific sites with high surface energy on surface and obeys the "indirect mechanism" whether there are bacteria or *** pyrite oxidation rate is not inhibited by inert sulfur on residue surface at elevated redox *** to the conclusions,the way to accelerate pyrite oxidation is proposed.

关键词： Pyrite column leaching Temperature Controlled redox potential Bacteria

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Cone-beam computed tomography noise reduction method based on U-Net with convolutional block attention module in proton therapy

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Nuclear Science and Techniques 2024年第7期35卷 89-100页

作者： Xing-Yue ruan Xiu-Fang Li Meng-ya Guo Mei Chen Ming Lv Rui Li Zhi-Ling Chen Shanghai Institute of Applied Physics Chinese Academy of SciencesShanghai201800China University of Chinese Academy of Sciences Beijing100049China Shanghai Advanced Research Institute Chinese Academy of SciencesShanghai201210China Department of Radiation Oncology Ruijin HospitalShanghai Jiao Tong University School of MedicineShanghai200025China Shanghai Key Laboratory of Proton therapy Shanghai201801China

Cone-beam computed tomography(CBCT) is mostly used for position verification during the treatment process. However,severe image artifacts in CBCT hinder its direct use in dose calculation and adaptive radiation therapy re-planning for proton therapy. In this study, an improved U-Net neural network named CBAM-U-Net was proposed for CBCT noise reduction in proton therapy, which is a CBCT denoised U-Net network with convolutional block attention modules. The datasets contained 20 groups of head and neck images. The CT images were registered to CBCT images as ground truth. The original CBCT denoised U-Net network, sCTU-Net, was trained for model performance comparison. The synthetic CT(SCT) images generated by CBAM-U-Net and the original sCTU-Net are called CBAM-SCT and U-Net-SCT images, respectively. The HU accuracies of the CT, CBCT, and SCT images were compared using four metrics: mean absolute error(MAE), root mean square error(RMSE), peak signal-to-noise ratio(PSNR), and structure similarity index measure(SSIM). The mean values of the MAE, RMSE, PSNR, and SSIM of CBAM-SCT images were 23.80 HU, 64.63 HU, 52.27 dB, and 0.9919, respectively,which were superior to those of the U-Net-SCT images. To evaluate dosimetric accuracy, the range accuracy was compared for a single-energy proton beam. The γ-index pass rates of a 4 cm × 4 cm scanned field and simple plan were calculated to compare the effects of the noise reduction capabilities of the original U-Net and CBAM-U-Net on the dose calculation results. CBAM-U-Net reduced noise more effectively than sCTU-Net, particularly in high-density tissues. We proposed a CBAM-U-Net model for CBCT noise reduction in proton therapy. Owing to the excellent noise reduction capabilities of CBAM-U-Net, the proposed model provided relatively explicit information regarding patient tissues. Moreover, it maybe be used in dose calculation and adaptive treatment planning in the future.

关键词： Proton therapy Cone-beam CT CBAM-U-Net γ-index

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HYDRAULIC CHARACTERISTICS OF CHUTE AERATORS FOR RELEASE WORKS

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Journal of Hydrodynamics 2008年第5期20卷 668-668页

作者： ruan Shi-ping College of Water Conservancy and Hydropower Engineering Hohai University （HHU） Nanjing 210098 China

On the basis of model tests and theoretical analysis, hydraulic characteristics, air demand, air concentration distribution and their relationships between prototype and model of an aerator were studied. Some computat... 详细信息

关键词： aeration aerator air demand air concentration distribution cavitation erosion

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Study on swelling model and thermodynamic structure of native konjac glucomannan

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Journal of Zhejiang University-Science B(Biomedicine & Biotechnology) 2009年第4期10卷 273-279页

作者： Long LI Hui ruan Liu-liu MA Wei WANG ping ZHOU Guo-qing HE Department of Food Science and Nutrition College of Biosystem Engineering and Food Science Zhejiang University Hangzhou 310029 China Department of Food Science and Technology Guangdong Shaoguan College Shaoguan 512005 China

We investigated the higher structure of konjac glucomannan (KGM) in the amorphous state and solution using a laser particle size analyzer and a water activity meter. The results show that the thermodynamic structures of native KGM were primarily composed of the lamella structure units, which involve both granular crystalline and amorphous regions, and that the connection zones of such units contained both loose and tight aggregation regions. The value of surface tension (σ) of native KGM, resting with the density of its hydroxyl groups' self-association, was an important parameter to analyze the higher structures of native KGM in the thermodynamic swelling model of native KGM.

关键词： Swelling model Thermodynamic structure Konjac glucomannan (KGM) Higher structure

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Advances and applications in single-cell and spatial genomics

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Science China Life Sciences 2025年

作者： Jingjing Wang Fang Ye Haoxi Chai Yujia Jiang Teng Wang Xia Ran Qimin Xia Ziye Xu Yuting Fu Guodong Zhang Hanyu Wu Guoji Guo Hongshan Guo Yijun ruan Yongcheng Wang Dong Xing Xun Xu Zemin Zhang Beijing Advanced Innovation Center for Genomics (ICG) Peking University Guangdong Provincial Key Laboratory of Genome Read and Write BGI Research Bone Marrow Transplantation Center of the First Affiliated Hospital & Liangzhu Laboratory Zhejiang University School of Medicine Life Sciences Institute and The Second Affiliated Hospital Zhejiang University BGI Research Biomedical Pioneering Innovation Center (BIOPIC) and School of Life Sciences Peking University Academy for Advanced Interdisciplinary Studies Peking University Institute of Hematology Zhejiang University Department of Laboratory Medicine of The First Affiliated Hospital & Liangzhu Laboratory Zhejiang University School of Medicine Center for Stem Cell and Regenerative Medicine Zhejiang University School of Medicine Zhejiang Provincial Key Lab for Tissue Engineering and Regenerative Medicine Dr.Li Dak Sum & Yip Yio Chin Center for Stem Cell and Regenerative Medicine

The applications of single-cell and spatial technologies in recent times have revolutionized the present understanding of cellular states and the cellular heterogeneity inherent in complex biological systems. These advancements offer unprecedented resolution in the examination of the functional genomics of individual cells and their spatial context within tissues. In this review, we have comprehensively discussed the historical development and recent progress in the field of single-cell and spatial genomics. We have reviewed the breakthroughs in single-cell multi-omics technologies, spatial genomics methods, and the computational strategies employed toward the analyses of singlecell atlas data. Furthermore, we have highlighted the advances made in constructing cellular atlases and their clinical applications,particularly in the context of disease. Finally, we have discussed the emerging trends, challenges, and opportunities in this rapidly evolving field.

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股权合作视角下“乡村振兴基金+合作社”共建数字农业的运营决策研究

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管理工程学报 2025年第1期39卷 285-301页

作者：樊文平王旭坪孙自来阮俊虎大连理工大学经济管理学院西北农林科技大学经济管理学院

在由地方政府和单个农民合作社组成的供应链中,本文引入政策倡导的财政支农资金市场化运作方式和股权合作模式,尝试探讨数字化技术应用于现代农业的运营决策问题。本文首先基于财政支农资金投入方式(无偿投入和有偿投资)的不同将地方政... 详细信息

在由地方政府和单个农民合作社组成的供应链中,本文引入政策倡导的财政支农资金市场化运作方式和股权合作模式,尝试探讨数字化技术应用于现代农业的运营决策问题。本文首先基于财政支农资金投入方式(无偿投入和有偿投资)的不同将地方政府划分为公益型政府和效益型政府,接着分别构建了两种类型政府投资数字化技术且农民合作社对该投资持股与否的博弈模型,最后分析了股权合作模式在数字农业投资运营中的实施动机及影响。研究表明:(1)数字农业技术可有效改善农产品品质;(2)股权合作模式仅在农民合作社和财政资金市场化运作的效益型政府之间存在实施动机;(3)实施股权合作模式后,农产品品质提升、市场需求量和政府利润均增加,但农民合作社利润受损;(4)在政府对农产品质量规范的基础上,激励相容协调机制可兼顾乡村振兴基金的收益性和政府的公益性,有效提升政农双方投资积极性。本文将政策研究同对策研究紧密结合,为政府制定相关政策推动数字农业发展提供理论依据。

关键词：政策研究与对策研究数字农业技术财政支农资金市场化运作股权合作模式

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