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循环氨水系统中的泵效率提升方法探究

当代化工研究 2024年第2期 128-130页

作者：许智赵立海黄煜筝神华巴彦淖尔能源有限责任公司内蒙古015300

随着现代工业和商业活动的不断扩展,循环氨水系统已成为多领域中的核心技术之一,广泛应用于制冷、空调、供暖、化工和制程等领域。其中泵的性能和效率直接影响了整个系统的能源消耗。本文将深入探讨循环氨水系统中泵效率的重要性,并详... 详细信息

随着现代工业和商业活动的不断扩展,循环氨水系统已成为多领域中的核心技术之一,广泛应用于制冷、空调、供暖、化工和制程等领域。其中泵的性能和效率直接影响了整个系统的能源消耗。本文将深入探讨循环氨水系统中泵效率的重要性,并详细分析了影响泵效率的主要因素。此外,提出了一系列泵效率提升方法,包括泵的安装方法、仪器设备的保养和维修等。旨在帮助系统设计师、工程师和维护人员更好地管理和改进泵的性能,以满足日益增长的能源效率和可持续性要求。

关键词：循环氨水系统泵效率提升方法

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基于白光干涉的三维表面形貌拼接方法研究

光电技术应用 2024年第2期39卷 44-50页

作者：任瑛黄育争魏长胜申展刘颖刚西安石油大学陕西省油气资源光纤探测工程研究中心和陕西省油气井测控技术重点实验室西安西安昂科光电有限公司西安

白光干涉测量技术由于具有非接触、无损伤、量程大、精度高和灵敏度高等特点,被应用于微纳米结构三维表面形貌测量中,但存在受限于显微物镜视场限制测量范围问题。提出了一种可以有效提高测量范围的三维表面形貌拼接方法。通过对多次采... 详细信息

白光干涉测量技术由于具有非接触、无损伤、量程大、精度高和灵敏度高等特点,被应用于微纳米结构三维表面形貌测量中,但存在受限于显微物镜视场限制测量范围问题。提出了一种可以有效提高测量范围的三维表面形貌拼接方法。通过对多次采集的小范围高分辨率白光干涉图样进行域划分,采用三维形貌数据拼接配准方法,利用模板匹配算法对图像的二值化矩阵进行匹配计算,实现了待测元件的表面形貌的有效表征。研究发现,当采用不同的图像拼接方式即上下拼接、左右拼接和2&2拼接方式时,图像拼接效果有一定差异,其准确度和产生的误差不同。三种拼接方式中,2&2拼接方式能够有效减小操作误差,实现大范围和高分辨干涉图样拼接,在白光干涉三维形貌表征中具有广阔应用前景。

关键词：白光干涉仪表面形貌拼接方式图像划分

Real-time,single-particle chemical composition,volatility and mixing state measurements of urban aerosol particles in southwest China

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Journal of Environmental Sciences 2024年第2期136卷 361-371页

作者： Luyao Chen Junke Zhang Jiaqi Li Xiaojuan huang yuzheng Xiang Jing Chen Tingru Pan Wei Zhang Faculty of Geosciences and Environmental Engineering Southwest Jiaotong UniversityChengdu 611756China School of Atmospheric Sciences Chengdu University of Information TechnologyChengdu 610225China Sichuan Environmental Monitoring Center Chengdu 610074China

To investigate the volatility of atmospheric particulates and the evolution of other particulate properties(chemical composition,particle size distribution and mixing state)with temperature,a thermodenuder coupled with a single particle aerosol mass spectrometer was used to conduct continuous observations of atmospheric fine particles in Chengdu,southwest *** of their complex sources and secondary reaction processes,the average mass spectra of single particles contained a variety of chemical components(including organic,inorganic and metal species).When the temperature rose from room temperature to280℃,the relative areas of volatile and semi-volatile components decreased,while the relative areas of less or non-volatile components ***(>80%)nitrate and sulfate existed in the form of NH_(4)NO_(3)and(NH_(4))_(2)SO_(4),and their volatilization temperatures were50–100℃and 150–280℃,*** contribution of biomass burning(BB)and vehicle emission(VE)particles increased significantly at 280℃,which emphasized the important role of regional biomass burning and local motor vehicle emissions to the core of *** the increase in temperature,the particle size of the particles coated with volatile or semi-volatile components was reduced,and their mixing with secondary inorganic components was significantly *** formation of K-nitrate(KNO_(3))and K-sulfate(KSO_(4))particles was dominated by liquid-phase processes and photochemical reactions,*** KNO_(3)and BB particles is the key to improving *** new results are helpful towards better understanding the initial sources,pollution formation mechanisms and climatic effects of fine particulate matter in this megacity in southwest China.

关键词： Atmospheric fine particles TD-SPAMS Chemical composition Volatility Mixing state

Phase engineering of Pd–Te nanoplates via potential energy trapping

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eScience 2024年第2期4卷 117-126页

作者： Mengjun Wang Jun Jia Hao Yan Guang Li Qiming Hong yuzheng Guo Yong Xu Xiaoqing huang State Key Laboratory of Physical Chemistry of Solid Surfaces College of Chemistry and Chemical EngineeringXiamen UniversityXiamen361005China Guangzhou Key Laboratory of Low-Dimensional Materials and Energy Storage Devices Collaborative Innovation Center of Advanced Energy MaterialsSchool of Materials and EnergyGuangdong University of TechnologyGuangdong510006China School of Electrical Engineering and Automation Wuhan UniversityHubei430072China Testing and Analysis Center College of Chemistry and Chemical EngineeringXiamen UniversityXiamen361005China Innovation Laboratory for Sciences and Technologies of Energy Materials of Fujian Province(IKKEM) Xiamen361005China

Phase modulation of noble metal alloys(NMAs)is critically important in nanoscience since the distinct atomic arrangements can largely determine their physicochemical ***,the precise modulation of NMAs is formidably challenging,because thermodynamically stable phases are generally preferential compared to those metastable ***,we proposed a potential energy trapping strategy for phase modulation of Pd–Te alloys with ***,ethylene glycol can increase the energy barrier for both Pd leaching and Te introduction,forming metastable Pd20Te7 ***,N,N-dimethylformamide is unable to trap metastable phase,inducing the phase evolution to thermodynamically stable PdTe phase,and the precise phase modulation was realized including Pd20Te7,PdTe and PdTe2 *** Pd–Te alloys displayed phase-dependent formic acid oxidation catalytic performance with PdTe phase showing the *** work proposes a strategy for creating metastable phase with potential energy trap,which may deepen the understanding of phase engineering for noble metal-based nanocrystals.

关键词： Potential energy trap Phase modulation Metastable Pd-Te alloys

Lactate regulates major zygotic genome activation by H3K18 lactylation in mammals

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National Science Review 2024年第2期11卷 124-134页

作者： Jingyu Li Weibo Hou Qi Zhao Wei Han Hongdi Cui Songling Xiao Ling Zhu Jiadan Qu Xiaoyu Liu Weitao Cong Jingling Shen yuzheng Zhao Shaorong Gao Guoning huang Qingran Kong Chongqing Key Laboratory of Human Embryo Engineering Center for Reproductive Medicine Chongqing Health Center for Women and ChildrenWomen and Children's Hospital of Chongqing Medical University Oujiang Laboratory Zhejiang Provincial Key Laboratory of Medical Genetics Key Laboratory of Laboratory MedicineMinistry of EducationSchool of Laboratory Medicine and Life Sciences Wenzhou Medical University Frontier Science Center for Stem Cell Research School of Life Sciences and Technology Tongji University School of Pharmaceutical Science Wenzhou Medical University Institute of Life Sciences College of Life and Environmental Sciences Wenzhou University Optogenetics&Synthetic Biology Interdisciplinary Research Center State Key Laboratory of Bioreactor Engineering Shanghai Frontiers Science Center of Optogenetic Techniques for Cell Metabolism School of Pharmacy East China University of Science and Technology

Lactate is present at a high level in the microenvironment of mammalian preimplantation embryos in vivo and in vitro. However, its role in preimplantation development is unclear. Here, we report that lactate is highly enriched in the nuclei of early embryos when major zygotic genome activation(ZGA) occurs in humans and mice. The inhibition of its production and uptake results in developmental arrest at the 2-cell stage, major ZGA failure, and loss of lactate-derived H3K18lac, which could be rescued by the addition of Lac-Co A and recapitulated by overexpression of H3K18R mutation. By profiling the landscape of H3K18lac during mouse preimplantation development, we show that H3K18lac is enriched on the promoter regions of most major ZGA genes and correlates with their expressions. In humans, H3K18lac is also enriched in ZGA markers and temporally concomitant with their expressions. Taken together, we profile the landscapes of H3K18lac in mouse and human preimplantation embryos, and demonstrate the important role for H3K18lac in major ZGA, showing that a conserved metabolic mechanism underlies preimplantation development of mammalian embryos.

关键词： mammalian preimplantation development lactate epigenetic remodeling histone lactylation zygotic genome activation

(PS-g-LLDPE)-g-MAH增容PA6/LLDPE/PS三元共混物的微观结构及力学性能

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高分子材料科学与工程 2018年第12期34卷 83-89页

作者：沈帆董银春黄昱峥徐建平常州大学材料科学与工程学院江苏常州213164

以(聚苯乙烯(PS)-g-线型低密度聚乙烯(LLDPE))-g-马来酸酐(MAH)为相容剂,改变混合方法,制备了具有不同微观结构的尼龙6(PA6)/LLDPE/PS(60/20/20,质量分数)三元共混物。根据热力学、动力学因素,预判了共混物的微观结构;再结合扫描电镜和... 详细信息

以(聚苯乙烯(PS)-g-线型低密度聚乙烯(LLDPE))-g-马来酸酐(MAH)为相容剂,改变混合方法,制备了具有不同微观结构的尼龙6(PA6)/LLDPE/PS(60/20/20,质量分数)三元共混物。根据热力学、动力学因素,预判了共混物的微观结构;再结合扫描电镜和力学性能测试,考察了微观结构对力学性能的影响。结果表明,简单共混时,因界面张力的作用,在PA6中PS会包裹LLDPE形成壳核结构;该增容剂黏度大,增容时合适的混合方法,使其更易扩散至相界面,有利于阻碍PS包裹LLDPE,使两相独立分散;预判结果与测试结果相一致;壳核结构的出现,会掩盖LLDPE(核)的韧性,使材料呈现出硬而脆的特点;两相独立分散,在保证材料刚性的同时又能提高韧性;采用(PS-g-LLDPE)-g-MAH先与PS、LLDPE混合再与PA6混合的共混法时,增容效果最好,其缺口冲击强度相较于简单共混物提高了近5倍,材料整体表现出硬而韧的特点。

关键词：三元共混增容混合方法结构预判微观结构力学性能

酸酐化LLDPE/PS增容母料对LLDPE/PS/PA6三元共混物结构及性能的影响

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高分子材料科学与工程 2018年第7期34卷 72-77页

作者：沈帆董银春黄煜峥徐建平常州大学材料科学与工程学院江苏常州213164

结合聚烯烃与聚苯乙烯间的Friedel-Crafts烷基化反应和聚烯烃熔融接枝马来酸酐(MAH)技术,制备了酸酐化线性低密度聚乙烯(LLDPE)/聚苯乙烯(PS)(70/30,质量比)增容母料。以该母料作为多相相容剂,考察了其对LLDPE/PS/尼龙6(PA6)(60/20/20,... 详细信息

结合聚烯烃与聚苯乙烯间的Friedel-Crafts烷基化反应和聚烯烃熔融接枝马来酸酐(MAH)技术,制备了酸酐化线性低密度聚乙烯(LLDPE)/聚苯乙烯(PS)(70/30,质量比)增容母料。以该母料作为多相相容剂,考察了其对LLDPE/PS/尼龙6(PA6)(60/20/20,质量比)三元共混物微观结构、力学性能和流变性能的影响。红外测试结果表明,酸酐化LLDPE/PS增容母料中含有(LLDPE/LLDPE-g-PS)-g-MAH;三元共混物加入母料后有接枝物(LLDPE/LLDPE-g-PS)-gPA6生成。扫描电镜及力学性能测试结果显示,三元共混物加入质量分数为10%母料后两分散相粒径显著减小,三相之间从互相分离转变为互相连接;力学性能明显提高。动态流变测试结果表明,加入母料后三元共混物的储能模量(G')、损耗模量(G″)和复数黏度(η*)上升,损耗因子(tanδ)减小;三元简单共混物出现2个内耗峰,母料的增容作用可使2个内耗峰均消失。

关键词：酸酐化增容母料多相相容剂三元共混微观结构流变行为

Identification of newly developed advanced schistosomiasis with MALDI-TOF mass spectrometry and ClinProTool analysis

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Identification of newly developed advanced schistosomiasis w...

UHPLC-MS-based metabolomics analysis reveals the process of Schistosomiasis in mice

2021中国畜牧兽医学会兽医寄生虫学分会第16次学术研讨会

作者： yuzheng huang Yongliang Xu Yi huang Fang Sun Haisong Tian Nannan Hu Liang Shi Haiyong Hua National Health Commission Key Laboratory of Parasitic Disease Control and Prevention Jiangsu Provincial Key Laboratory on Parasite and Vector Control TechnologyJiangsu Institute of Parasitic Diseases People's Republic of China Public Health Research Center Jiangnan University

Cases of newly developed advanced schistosomiasis(NDAS) have occurred in areas where schistosomiasis transmission has been blocked for> 25 *** causes and pathogenesis of NDAS are still *** of NDAS relies on historical investigation and clinical symptoms,such as liver fibrosis,hepatic ascites and abnormal biochemical indexes in *** is important but difficult at this stage to develop a new tool for early screening and rapid *** this study,serum peptides from patients with thirty NDAS and thirty healthy controls were captured with weak cation exchange magnetic beads,subjected to matrix-assisted laser desorption ionization time-of-flight mass spectrometry and ClinProTool *** peaks with m/z 924,2661,2953,2991,3241,3884,5337,5905,5943,7766 and 9289 were decreased and three peaks with m/z 1945,2082 and 4282 were increased in the NDAS *** proteomic detection pattern(PDP) was established with 14 different peptide peaks,and its sensitivity and specificity were investigated with blind *** peptide mass fingerprints of sera from fifty NDAS patients and one hundred health control were double-blind subjected to PDP method,fifty patients and ninety-two health were classified as NDAS and health separately,which showed 100% sensitivity and 92% *** results showed that PDP could be a new and useful method to detect NDAS.

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UHPLC-MS-based metabolomics analysis reveals the process of ...