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Chinese Journal of Chemical Engineering 2024年第1期65卷 1-7页

作者： Risheng shen Shilong Li Yuqing Sun yuan Bai Jian Lu Wenheng Jing State Key Laboratory of Materials-Oriented Chemical Engineering Nanjing Tech UniversityNanjing 210009China National Energy Group Science and Technology Research Institute Co. Ltd.Nanjing 210023China

Membrane technology has become the mainstream process for the production of electronic grade hydrogen peroxide(H_(2)O_(2)).But due to the oxidation degradation of the organic membranes(***)by the strong oxidative radicals(e.g.OH)generated via the activation of H_(2)O_(2)by iron ions(Fe^(3+)),the short effective lifetime of membranes remains a *** nano tin oxide(SnO_(2))has great potential for the removal of Fe^(3+)in strongly oxidative H_(2)O_(2)because of its ability to stabilize H2O_(2)and preferentially adsorb Fe^(3+).Herein,we have designed for the first time a flower-like robust SnO_(2)membrane on the ceramic support by in situ template-free one-step hydrothermal *** three-dimensional loose pore structure in the membrane built by interlacing SnO_(2)nanosheets endows the SnO_(2)membrane with a high specific surface area and abundant adsorption sites(AOH).Based on the coordination complexation and electrostatic attraction between the SnO_(2)surface and Fe^(3+),the membrane shows a high Fe3+removal efficiency(83%)and permeability(24 L·m^(-2)·h^(-1)·MPa^(-1))in H_(2)O_(2).This study provides an innovative and simple approach to designing robust SnO_(2)membranes for highly efficient removal of Fe^(3+)in harsh environments,such as strong oxidation conditions.

关键词： Hydrogen peroxide SnO_(2)membrane Adsorption Hydrothermal

Seroepidemiology and genetic characterization of hepatitis E virus in western Yunnan Province

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Asian Pacific Journal of Tropical Medicine 2014年第11期7卷 909-912页

作者： Li-Juan Li yuan-Ying shen Zhi-Qiong Ai Le Guo Cheng-Rui Geng School of Public Health Dali University

Objective:To investigate the seroepidemiology and genetic characterization of hepatitis E virus(HEV) in western Yunnan ***:Questionnaire survey was conducted among1638 residents in western Yunnan Province using stratified sampling ***-linked immunosorbent assay was used to detect serum anti-HEV IgG and *** RNA was extracted from patients with serum anti-HEV IgM *** open reading flame 2(ORF2) of HEV that was amplified by nested RT-PCR was sequenced and compared with standard HEV genotypes ***:Serum anti-HEV positive was found in 13.929(228/1638) *** HEV infection rate in males was significantly higher than that in females with a ratio of 1.47(P<0.01).20-30 and30-40 years old young men showed the highest incidence.20.57%and 20.78%.***10-20 and 20-30 years old young women exhibited the highest infection rate,11.85%and 15.60%,*** to occupation,the highest HEV infection rate was observed in farmers(20.35%) and migrants(16.50%).We isolated 10 individual HEV isolates from 31 patients with serum anti-HEV IgM *** analysis and phylogenetic analysis indicated that these10 HEV isolates belonged to HEV genotype 4 with the homology of 78.65%-94.71%.Conclusions:The HEV infection rate is high in western Yunnan *** genotype 4 is the leading cause of HEV infection and young farmers and migrants are the main infected population.

关键词： Hepatitis E virus Phylogenetic analysis Homology Genotype

Cross-diffusion induced Turing instability of Hopf bifurcating periodic solutions in the reaction-diffusion enzyme reaction model

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International Journal of Biomathematics 2024年第4期17卷 133-150页

作者： Haicheng Liu Wenshuo yuan Bin Ge Jihong shen College of Mathematical Sciences Harbin Engineering University Harbin 150001 HeilongjiangP.R.China

Aiming at the spatial pattern phenomenon in biochemical reactions,an enzyme-reaction Sporns-Seelig model with cross-diffusion is chosen as study *** the central manifold theory,normal form method,local Hopf bifurcation theorem and perturbation theory,we study Turing instability of the spatially homogeneous Hopf bifurcation periodic *** last,the theoretical results are verified by numerical simulations.

关键词： Sporns-Seelig model diffusion Hopf bifurcation periodic solutions Turing instability

Synthetic auxotrophs accelerate cell factory development through growth-coupled models

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Frontiers of Chemical Science and Engineering 2024年第9期18卷 73-87页

作者： Liangpo Li Linwei Yu Xinxiao Sun Qipeng yuan Xiaolin shen Jia Wang State Key Laboratory of Chemical Resource Engineering Beijing University of Chemical TechnologyBeijing 100029China

The engineering of microbial cell factories for the production of high-value chemicals from renewable resources presents several challenges,including the optimization of key enzymes,pathway fluxes and metabolic *** these challenges involves the development of synthetic auxotrophs,a strategy that links cell growth with enzyme properties or biosynthetic *** linkage allows for the improvement of enzyme properties by in vivo directed enzyme evolution,the enhancement of metabolic pathway fluxes under growth pressure,and remodeling of metabolic networks through directed strain *** advantage of employing synthetic auxotrophs lies in the power of growth-coupled selection,which is not only high-throughput but also labor-saving,greatly simplifying the development of both strains and *** auxotrophs play a pivotal role in advancing microbial cell factories,offering benefits from enzyme optimization to the manipulation of metabolic networks within single ***,this strategy extends to coculture systems,enabling collaboration within microbial *** review highlights the recently developed applications of synthetic auxotrophs as microbial cell factories,and discusses future perspectives,aiming to provide a practical guide for growth-coupled models to produce value-added chemicals as part of a sustainable biorefinery.

关键词： synthetic auxotrophs growth-coupled directed enzyme evolution pathway flux directed strain evolution coculture

眼科非计划再次手术质控监管系统构建与应用研究

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医院管理论坛 2024年第3期41卷 46-49,40页

作者：王静陈晓蒙宋梓菱沈媛媛姚鑫周奕博黄小琼温州医科大学眼视光学院/生物医学工程学院温州医科大学附属眼视光医院/国家眼耳鼻喉疾病(眼部疾病)临床医学研究中心温州肯恩大学

本研究通过建立眼科非计划再次手术质控监管系统,实现了对眼科手术质量的实时监管,显著降低了非计划再次手术率和漏报率。系统具有上报审核、自动实时监管、数据收集、预警提醒、流程闭环监管等特点,能够全面收集患者基本信息、手术情... 详细信息

本研究通过建立眼科非计划再次手术质控监管系统,实现了对眼科手术质量的实时监管,显著降低了非计划再次手术率和漏报率。系统具有上报审核、自动实时监管、数据收集、预警提醒、流程闭环监管等特点,能够全面收集患者基本信息、手术情况、再次手术原因及整改措施等信息,为医院管理提供了有力支持。通过制定非计划再次手术质控监管流程,确保了监管工作的标准化和规范化。研究结果表明,系统运行后非计划再次手术率由0.25%降至0.14%,漏报率从25%下降为5%,差异均具有统计学意义。建立眼科非计划再次手术质控监管系统是提高手术质量、保障患者安全的有效措施,有助于医院实现手术质量安全的持续改进。

关键词：眼科非计划再次手术监管系统医疗质量

A New Version of Unified Field Theory—Stochastic Quantum Space Theory on Particle Physics and Cosmology

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Journal of Modern Physics 2013年第10期4卷 1213-1380页

作者： Zhi-yuan shen 不详

Stochastic Quantum Space (SQS) theory is a new version of unified field theory based on three fundamental postulations: Gaussian Probability Postulation, Prime Numbers Postulation, Vacuon Postulation. It build a framework with theoretical results agree with many experimental data well. For more information, please refer to the PDF.

关键词： Unified Field Theory Space Structure Elementary Particles Gaussian Probability Prime Numbers Sporadic Groups GUT Dark Matter Dark Energy Cosmos Inflaton Multiverse Anthropic Principle General Relativity Primary Basic Equations

Molecular characterization of organic matter transformation mediated by microorganisms under anoxic/hypoxic conditions

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Science China Earth Sciences 2023年第4期66卷 894-909页

作者： Shicong XIAO Jiaxin CHEN yuan shen Qi CHEN Yu WANG Yunyun LI Chen HE Ruanhong CAI Quan SHI Nianzhi JIAO Qiang ZHENG State Key Laboratory for Marine Environmental Science College of Ocean and Earth SciencesXiamen UniversityXiamen 361102China Fujian Key Laboratory of Marine Carbon Sequestration Xiamen 361102China College of Environment and Ecology Xiamen UniversityXiamen 361102China State Key Laboratory of Heavy Oil Processing China University of PetroleumBeijing 102249China

Dissolved organic matter(DOM) in the ocean is one of the largest carbon pools on Earth. Microbial metabolism is an important process that shapes the marine DOM pool. Current studies on the interactions between microorganisms and DOM focus mainly on oxic environments. Few studies have addressed the molecular characteristics of DOM in microbial-mediated transformation under anoxic/hypoxic conditions. As a result of deteriorating water quality due to eutrophication and global warming, anoxia occurs frequently in coastal waters. In this study, we performed an experiment to investigate changes in microbial community responses and the molecular characteristics of DOM in microbial-mediated transformation under hypoxic conditions. We compared microbial-mediated DOM transformation at different dissolved oxygen levels(7, 5, and 2 mg L^(-1)) and in different media(natural and artificial seawater with and without laminarin). We also investigated differences in DOM composition between groups using spectroscopic analysis and ultrahigh-resolution Fourier transform ion cyclotron resonance mass spectrometry. The results showed decreased microbial metabolic activity and delayed community succession at low oxygen(≤2 mg L^(-1)) in natural seawater supplemented with laminarin. The growth of strictly aerobic bacteria such as Pseudomonadaceae and Sphingomonadaceae was inhibited and the total organic carbon utilization rate was reduced by 36.9–46.7% from 4 to 32days. Moreover, tyrosine-like and tryptophan-like components were preserved, while DOM humification and modified aromaticity indices were significantly reduced under low oxygen conditions. This experiment provides justification for further study of the processes and mechanisms of improved labile DOM preservation in anoxic estuarine and coastal waters.

关键词： Anoxic/hypoxic Microbial community structure Dissolved organic matter Chemical characteristics of molecule

Virtual reality training improves accommodative facility and accommodative range

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International Journal of Ophthalmology(English edition) 2022年第7期15卷 1116-1121页

作者： Dong-Yu Guo yuan-yuan shen Miao-Miao Zhu Yang-Yang Zhan Xia-Wei Wang Jian-Hua Xia Bo Jiang Yang-Shun Gu Yan Long Department of Ophthalmology First Affiliated Hospital of Zhejiang UniversityHangzhou 310000Zhejiang ProvinceChina Department of Internal Medicine Liangzhu HospitalYuhang DistrictHangzhou 310000Zhejiang ProvinceChina Department of Ophthalmology Shulan HospitalHangzhou 310000Zhejiang ProvinceChina

AIM: To evaluate the effects of virtual reality(VR) training on different parameters of ***: Sixty individuals ranged 18-60 years old with asthenopia were randomly divided into short-term(n=40) and long-term(n=20) treatment groups. They were given a specially designed VR training device only once for 15 min or 3-4 times a day for 15 min each time for 1 mo. The visual acuity, spherical equivalent, accommodative range, accommodative facility, pupil size, and visual fatigue were evaluated before(control) and after VR training. RESULTS: The visual acuity, accommodative range, and accommodative facility increased in subjects of the shortterm treatment group, whereas their pupil size contracted significantly. No significant changes in spherical equivalent and visual fatigue were observed. The changes in distant vision and corrected visual acuity were positively correlated with those in pupil size, but not with spherical equivalent. The accommodative range and accommodative facility improved significantly in subjects of the long-term treatment group. No significant changes in visual acuity, spherical equivalent, pupil size, and visual fatigue were noted. CONCLUSION: VR training can improve the accommodative range and accommodative facility of human eyes. Although short-term VR training can transiently improve vision, which probably due to bright light adaptation, there is no evidence that it can improve myopia.

关键词： virtual reality visual function myopia visual fatigue accommodation

A mini review on the separation of Al,Fe and Ti elements from coal fly ash leachate

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International Journal of Coal Science & Technology 2024年第2期11卷 1-15页

作者： yuan Shi Fengqi Jiang Rongjiao Wang Sasha Yang Xiaofeng Zhu Yingying shen State Key Laboratory of Advanced Processing and Recycling of Nonferrous Metals School of Material Science and EngineeringLanzhou University of TechnologyLanzhou 730050China Department of Chemical and Biological Engineering Monash UniversityWellington RoadClaytonMelbourneVIC 3800Australia

The electricity demand is increasing rapidly with the development of society and ***-fired thermal power plants have become one of the primary sources of electricity generation for ***,coal-fired thermal power plants produce a great amount of by-product coal fly ash every *** fly ash disposal in landfills requires a sizable space and has negative environmental ***,it is crucial to develop new technologies and methods to utilize this enormous volume of solid waste in order to protect the *** this review,the fundamental physical and chemical character-istics of coal fly ash are introduced,and afterward the disposal policies and utilization ways of coal fly ash are discussed to gain a comprehensive understanding of the various ways this *** leaching of valuable metals in coal fly ash and the extraction of metal elements in leachate under different conditions are also ***,the possibility of coal fly ash to serve as a supplementary source for mineral resources is analyzed,providing a basis for its extensive use as a raw material in the metal industry in China and worldwide.

关键词： Coal fly ash Waste utilization Metals extraction

Numerical study on the filtration characteristics of fine particles in granular bed filter at high temperature

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Particuology 2024年第10期93卷 41-53页

作者： Kangning Zhu Jie Cai yuan Li Xiaoyou shen Jianfei Xi Yunjun Wang Zhongzhu Gu School of Energy and Mechanical Engineering Nanjing Normal UniversityNanjing210023China

Granular bed filter(GBF)has become one of the current research hot topics due to its excellent performance in removing fine *** this paper,a three-dimensional fixed bed GBF filtration model was established and its accuracy was ***,the GBF filtration performance at high temperature were *** results demonstrate that elevating the temperature diminishes the filtration efficiency,albeit to a limited *** increasing of inlet gas velocity can significantly improve pressure drop for GBF and the filtration efficiency for fine particles of sizes larger than 5μ*** the diameter of stacked granular particle diameter grows,the filtration efficiency and pressure drop *** density of fine particles almost does not affect the filtration efficiency for fine particles of 1∼7μm,but a higher density leads to a higher filtration efficiency for fine particles of sizes bigger than 9μ***,as the fine particles size increases,the change of the filtration efficiency roughly goes through three stages:Stage 1:the filtration efficiency is basically unchanged;Stage 2:the filtration efficiency increases rapidly;Stage 3:the filtration efficiency increases steadily,but the rate of increase slows *** the increase of the fine particles Stokes number,the filtration efficiency of GBF will pass through two phases of stabilization and rapid increase.

关键词： Granular bed filter Fine particles High temperature Filtration efficiency