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Zeolite-encaged gold catalysts for the oxidative condensation of furfural

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FRONTIERS OF CHEMICAL SCIENCE AND ENGINEERING 2024年第8期18卷 90-0页

作者： li, weijie Gao, Mingyang Qin, Bin Deng, Xin li, Landong Nankai Univ Sch Mat Sci & Engn Tianjin 300350 Peoples R China Nankai Univ Coll Chem Tianjin 300071 Peoples R China Haihe Lab Sustainable Chem Transformat Tianjin 300192 Peoples R China

The oxidative condensation between renewable furfural and fatty alcohols is a crucial avenue for producing high-quality liquid fuels and valuable furan derivatives. The selectivity control in this reaction process remains a significant challenge. Herein, we report the strategy of confining well dispersed gold species within ZSM-5 structure to construct highly active Au@ZSM-5 zeolite catalysts for the oxidative condensation of furfural. Characterization results and spectroscopy analyses demonstrate the efficient encapsulation of isolated and cationic Au clusters in zeolite structure. Au@ZSM-5(K) catalyst shows remarkable performance with 69.7% furfural conversion and 90.2% furan-2-acrolein selectivity as well as good recycle stability. It is revealed that the microstructure of ZSM-5 zeolite can significantly promote oxidative condensation activity through confinement effects. This work presents an explicit example of constructing zeolite encaged noble metal catalysts toward targeted chemical transformations.

关键词： zeolite encapsulation gold oxidative condensation furfural ROOM-TEMPERATURE CO OXIDATION ACTIVE GOLD BIOMASS NANOPARTICLES CHEMICALS CONVERSION FTIR HYDROGENATION AU/TIO2

Probiotic Pediococcus pentosaceus restored gossypol-induced intestinal barrier injury by increasing propionate content in Nile tilapia

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Journal of Animal Science and Biotechnology 2024年第4期15卷 1688-1703页

作者： Feifei Ding Nannan Zhou Yuan Luo Tong Wang weijie li Fang Qiao Zhenyu Du Meiling Zhang Laboratory of Aquaculture Nutrition and Environmental Health(LANEH) School of Life SciencesEast China Normal UniversityShanghai 200241China

Background Intestinal barrier is a dynamic interface between the body and the ingested food components, however, dietary components or xenobiotics could compromise intestinal integrity, causing health risks to the host. Gossypol, a toxic component in cottonseed meal(CSM), caused intestinal injury in fish or other monogastric animals. It has been demonstrated that probiotics administration benefits the intestinal barrier integrity, but the efficacy of probiotics in maintaining intestinal health when the host is exposed to gossypol remains unclear. Here, a strain(YC) affiliated to Pediococcus pentosaceus was isolated from the gut of Nile tilapia(Oreochromis niloticus) and its potential to repair gossypol-induced intestinal damage was *** A total of 270 Nile tilapia(2.20 ± 0.02 g) were allotted in 3 groups with 3 tanks each and fed with 3 diets including CON(control diet), GOS(control diet containing 300 mg/kg gossypol) and GP(control diet containing 300 mg/kg gossypol and 10^(8) colony-forming unit(CFU)/g P. pentosaceus YC), respectively. After 10 weeks, addition of P. pentosaceus YC restored growth retardation and intestinal injury induced by gossypol in Nile tilapia. Transcriptome analysis and si RNA interference experiments demonstrated that NOD-like receptors(NLR) family caspase recruitment domain(CARD) domain containing 3(Nlrc3) inhibition might promote intestinal stem cell(ISC) proliferation, as well as maintaining gut barrier integrity. 16S r RNA sequencing and gas chromatography-mass spectrometry(GC-MS) revealed that addition of P. pentosaceus YC altered the composition of gut microbiota and increased the content of propionate in fish gut. In vitro studies on propionate's function demonstrated that it suppressed nlrc3 expression and promoted wound healing in Caco-2 cell *** The present study reveals that P. pentosaceus YC has the capacity to ameliorate intestinal barrier injury by modulating gut microbiota composition and elevating

关键词： Gut barrier injury Gossypol ISCs proliferation Nlrc3 Propionate

Evaluation of Resistance of Different Kiwifruit Varieties (lines) to Canker Disease and Brown Spot Disease

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Phyton-International Journal of Experimental Botany 2024年第6期93卷 1249-1261页

作者： Wenwen Su Chongpei Zheng Zhencheng Han Chunguang Ren Di Wu Tao li Yi Yang weijie li Institute of Mountain Resources of Guizhou Province Guizhou Academy of SciencesGuiyang550001China Guizhou Botanical Garden Guizhou Academy of SciencesGuiyang550001China Key Laboratory of Plant Resource Conservation and Germplasm Innovation in Mountainous Region(Ministry of Education) Institute of Agro-Bioengineering/College of Life SciencesGuizhou UniversityGuiyang550025China

Kiwifruit canker and brown spot are signiﬁcant diseases affecting kiwis,caused by Pseudomonas syringae patho-genic variations(Pseudomonas syringae ***(Psa))and Corynesporapolytica(Corynespora cassiicola).At present,the research on canker disease and brown spot disease mainly focuses on the isolation and identiﬁcation of pathogenic bacteria,drug control,resistance gene mining and functional veriﬁ*** has proved that breeding disease resistant varieties are an effective method to control canker disease and brown spot ***,most existing cultivars lack genes for canker and brown spot *** kiwifruit resources in nat-ure exhibit extensive genetic diversity due to prolonged natural selection,containing numerous resistance ***,due to insufﬁcient understanding of the resistance of most kiwifruit varieties(lines)to canker disease and brown spot disease,some high-quality resources have not been fully *** incidence of canker and brown spot of 18 kiwifruit cultivars(lines)was measured by inoculating isolated branches and leaves,and their resistance to canker and brown spot was analyzed according to the length,disease index,mean diameter,and systematic *** results were as follows:Among 18 different kiwifruit varieties(lines)for canker disease,there were two highly resistant materials,eight disease-resistant materials,four disease-susceptible materials,and two highly susceptible ***,regarding brown spot disease,there were one highly resistant material,ﬁve dis-ease-resistant materials,four susceptible materials,and three highly susceptible ***,four resources were resistant to both *** outcomes provided a theoretical basis for breeding kiwifruit against canker and brown spot.

关键词： Kiwifruit canker disease brown spot resistance evaluation

Study on Fly Ash Based Porous Ceramsite as Biological Filter Media

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Agricultural Biotechnology 2024年第1期13卷 71-73页

作者： Ruigang WANG Shuo WANG weijie li Hailong liU Shanxi Laboratory for Yellow River School of Environment and ResourcesShanxi UniversityTaiyuan 030006China

Using fly ash as a raw material,porous ceramic particles with an apparent density of 1.21 g/cm^(3),a visible porosity of 51.03%,and a specific surface area of 4.26 m^(2)/g were prepared and used as biofilter materials for wastewater *** SEM,XRD analysis,and heavy metal leaching analysis,it was found that porous ceramsite were porous materials with rough *** calcination,the newly formed mineral was silicate calcium *** heavy metal concentration in the leaching solution of porous ceramsite met the national surface water quality *** treatment of domestic sewage showed that the volumetric loads of COD Cr,NH_(4)^(+)-N,and TN removed by the aerated biofilter were 5.23,0.98,and 0.35 kg/(m^(3)·d),respectively,with removal rates of 85.46%,96.13%,and 32.31%.

关键词： Porous ceramsite Domestic sewage Fly ash

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整合药理学在中医药现代研究的若干进展

中国实验方剂学杂志 2024年第14期30卷 270-278页

作者：李珊珊李玮婕王萍中国中医科学院中药研究所北京100700

中药方剂作为临床治疗的主要形式和手段,是中医理法方药的关键环节,是中医学理论和临床实践的桥梁,探索中药方剂的化学物质实体和机体生命活动的关系及其复杂交互规律,是中药现代研究的关键科学问题之一。然因本身组成的复杂性、生物效... 详细信息

中药方剂作为临床治疗的主要形式和手段,是中医理法方药的关键环节,是中医学理论和临床实践的桥梁,探索中药方剂的化学物质实体和机体生命活动的关系及其复杂交互规律,是中药现代研究的关键科学问题之一。然因本身组成的复杂性、生物效应表达的多样性,使其“化学成分群-体内过程-药效活性”之间缺乏“完整的证据链”,存在严重的“碎片化”现象。整合药理学的提出,是中药复杂系统分子作用解析的有效策略和方法,特别体现了以生物技术革命为代表的第四次浪潮的时代背景下,利用互联网、大数据、人工智能为代表的新技术驱动中药复杂体系发展的新趋势,为系统揭示多成分药物与机体相互作用及其整合规律和作用原理提供了一条切实可行的途径。该文试从中药整合药理学的形成和发展、研究思路、关键技术及应用等方面进行综述,为阐释中医药理论的科学内涵和中医原创思维的科学价值、总结与传承名医经验、中药质量控制、中药作用原理阐释和中药新药研发等提供强有力支持。

关键词：整合药理学中药方剂证候生物内涵安全性和有效性质量控制药效物质基础

使用聚乙二醇和海藻糖的组合冷冻干燥牛心包的性能影响

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生物医学工程学杂志 2024年第2期41卷 368-375页

作者：黄伟李维杰刘宝林上海理工大学生物系统热科学研究所上海200093 上海市肿瘤能量治疗技术与器械协同创新中心上海200093 上海市生物资源低温保存技术服务平台上海200093

冷冻干燥是一种使生物样本在干燥状态下保存的技术,有利于储存、运输并节省成本。本文使用聚乙二醇(PEG)和海藻糖(Tre)组成的冻干保护剂处理牛心包,进行冷冻干燥。结果表明:使用PEG+10%w/v Tre处理牛心包进行冷冻干燥后,其力学性能优于... 详细信息

冷冻干燥是一种使生物样本在干燥状态下保存的技术,有利于储存、运输并节省成本。本文使用聚乙二醇(PEG)和海藻糖(Tre)组成的冻干保护剂处理牛心包,进行冷冻干燥。结果表明:使用PEG+10%w/v Tre处理牛心包进行冷冻干燥后,其力学性能优于使用戊二醛(GA)固定的牛心包。卡尔费休法测定,牛心包复水后的湿态含水量为(74.81±1.44)%,与GA固定的牛心包无明显差异。干态含水量为(8.64±1.52)%,说明在冷冻干燥过程中能有效脱水。差示扫描量热仪(DSC)的测试结果显示,牛心包的热皱缩温度为(84.96±0.49)℃比GA固定的牛心包(83.14±0.11)℃高,说明具有更高的热稳定性。傅里叶变换红外光谱(FTIR)结果显示,在冷冻干燥过程中,蛋白质结构并未受到破坏。苏木精-伊红(HE)染色表明,冷冻干燥过程可以减少孔隙的产生,防止冰晶的生长,使组织纤维结构排列更紧密。细胞存活率与溶血率检测结果显示,细胞增殖率为(77.87±0.49)%,毒性分级为1级,溶血率为(0.17±0.02)%,低于5%的标准,即经过冷冻干燥处理的牛心包在细胞毒性和溶血方面表现良好,符合相关标准。综上,使用PEG+10%w/v Tre处理牛心包进行冷冻干燥后的性能符合要求。

关键词：冷冻干燥力学性能热皱缩温度聚乙二醇海藻糖

碳纤维布表面PyC界面相微观结构及均匀性的工艺调控

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无机材料学报 2024年第4期39卷 399-408,I0010-I0012页

作者：薛轶凡李玮洁张中伟庞旭刘愚北京理工大学先进结构技术研究院北京100081 北京交通大学土木建筑工程学院北京100044 中南大学粉末冶金研究院粉末冶金国家重点实验室长沙410083

陶瓷基复合材料力学性能与界面相的微观结构和均匀性有密切关系。本研究在碳纤维布表面沉积PyC界面相,探究沉积温度、丙烯分压、滞留时间和氢气分压等工艺参数对PyC界面相微观结构及均匀性的影响规律。使用多种手段对PyC界面相微观形貌... 详细信息

陶瓷基复合材料力学性能与界面相的微观结构和均匀性有密切关系。本研究在碳纤维布表面沉积PyC界面相,探究沉积温度、丙烯分压、滞留时间和氢气分压等工艺参数对PyC界面相微观结构及均匀性的影响规律。使用多种手段对PyC界面相微观形貌、织构进行表征,并分析了微观结构、均匀性与工艺参数之间的内在关联。结果表明:界面相织构的规整度随沉积温度和丙烯分压的提高而提高,随氢气分压的提高而降低,而受滞留时间影响较小;沉积温度和丙烯分压升高均导致界面相厚度分布更加不均匀,且丙烯分压过高会直接产生炭黑,延长滞留时间有利于提高界面相的均匀性;对于中织构和高织构,随着氢气分压提高,界面相均匀性先降低后增加,而低织构的界面相均匀性受其影响较小。最后,阐明了PyC界面相生长模式,揭示了工艺参数对PyC界面相织构形态及均匀性的影响规律,为PyC界面相的精细调控提供了基础。

关键词：陶瓷基复合材料 PyC界面相均匀性微观结构

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锂离子电池拆解回收技术及进展

化工进展 2024年第8期43卷 4601-4613页

作者：黎伟杰路蕾蕾李得科王春航张祖铭谭强西安理工大学理学院陕西西安710048 中节能西安启源机电装备有限公司陕西西安710200 西安交通大学材料科学与工程学院陕西西安710049

锂离子电池的广泛使用带来了越来越多的电池废弃物,如何环保、安全、低成本地处理这些废旧锂离子电池成了该领域的热点问题。本文以废旧锂离子电池的危害和资源利用价值为背景,重点介绍了废旧锂离子电池拆解回收的工艺流程,其中包括了... 详细信息

锂离子电池的广泛使用带来了越来越多的电池废弃物,如何环保、安全、低成本地处理这些废旧锂离子电池成了该领域的热点问题。本文以废旧锂离子电池的危害和资源利用价值为背景,重点介绍了废旧锂离子电池拆解回收的工艺流程,其中包括了预处理、主流回收方法、金属分离回收和再生利用等部分,以相关技术原理为基础,重点归纳了近几年湿法回收为主的废旧锂离子电池回收利用各环节工艺流程的学术成果,并对工艺过程中各个方法进行了优势与不足的分析,其次对于物理回收和火法回收等方面作了简要介绍。最后,在现有的回收现状上,对锂离子电池未来进行展望,提出建立大型预处理生产线、在相邻领域再利用回收材料、重复使用化学试剂等合理的发展方向。

关键词：废旧锂离子电池废物处理回收浸出再生

10 kV与20 kV系统在半导体项目上的设计要点分析

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电子工业专用设备 2024年第2期53卷 20-26页

作者：李伟杰中国电子系统工程第二建设有限公司上海214000

半导体作为国家目前发展的重点,新建了很多200 mm(8英寸)和300 mm(12英寸)的半导体项目,而半导体项目自身又具有高用电需求的特点,所以针对10 kV和20 kV不同电压等级对技术要点进行分析和研究是十分必要。分别对10 kV和20 kV的电力系统... 详细信息

半导体作为国家目前发展的重点,新建了很多200 mm(8英寸)和300 mm(12英寸)的半导体项目,而半导体项目自身又具有高用电需求的特点,所以针对10 kV和20 kV不同电压等级对技术要点进行分析和研究是十分必要。分别对10 kV和20 kV的电力系统方案进行分析,并对短路电流计算进行理论试算,归纳所对应的设备选型所对应参数,并结合实际案例分析比较所对应的站房需求和结构柱网型式,最终得出两种电压等级下所对应的设计要点,为其他设计人员在后续设计中提供借鉴。

关键词：电压等级半导体短路电流设计要点