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Evaluation of the injection and plugging ability of a novel epoxy resin in cement cracks

Petroleum Science 2024年第2期21卷 1211-1220页

作者： Guang-Yao Leng Wei Yan Hai-Mu Ye Er-Dong Yao Ji-Bin Duan Zheng-Xian Xu Ke-Pei Li Jing-ru Zhang Zhong Li State Key Laboratory of Petroleum Resource&Prospecting China University of Petroleum(Beijing)Beijing102249China CNPC Liaohe Oilfield Gas Storage Co.LTD Panjin124000LiaoningChina CNOOC Research Institute Co. Ltd.Beijing100028China

Sustained casing pressure(SCP)is a crucial issue in the oil and gas production *** resins,exhibiting exceptional compressive strength,ductility,and shear bonding strength,have the potential to form reliable *** injectivity and sealing capacity of the epoxy resin is crucial parameters for the success of shallow remediation *** study aimed to develop and assess a novel solid-free resin sealant as an alternative to Portland cement for mitigating fluid *** investigation evaluated the viscosity,compressive strength,and brittleness index of the epoxy resin sealant,as well as its tangential and normal shear strengths in conjunction with casing *** flow characteristics and sealing abilities of conventional cement and epoxy resin were comparatively analyzed in *** results showed that the application of a viscosity reducer facilitated control over the curing time of the epoxy resin,ranging from 1.5 to 6 h,and reduced the initial viscosity from 865.53 to 118.71 m Pa,*** mechanical properties of the epoxy resin initially increased with a rise in curing agent content before experiencing a minor *** epoxy resin containing 30%curing agent exhibited optimal mechanical *** a 14-day curing period,the epoxy resin's compressive strength reached81.37 MPa,2.12 times higher than that of cement,whereas the elastic modulus of cement was 2.99 times greater than that of the epoxy *** brittleness index of epoxy resin is only 3.42,demonstrating high flexibility and *** tangential and normal shear strengths of the epoxy resin exceeded those of cement by 3.17 and 2.82 times,*** a 0.5 mm-wide crack,the injection pressure of the epoxy resin remained below 0.075 MPa,indicating superior injection and flow ***,the injection pressure of cement surged dramatically to 2.61 MPa within 5 *** breakthrough pressure of0.5 PV epoxy resin reached 7.53 MPa,decreasing the crack's perme

关键词： Sustained casing pressure Epoxy resin sealant Curing agent Viscosity reducer Mechanical properties Crack sealing

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Endophytic Occupation in Nodules of Rhynchosia Plants from Semiarid Regions of Argentina

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Phyton-International Journal of Experimental Botany 2024年第6期93卷 1081-1099页

作者： Cinthia T.Lucero María de los Á.ruíz Fabiola Pagliero Carolina Castaño Mariela L.Ambrosino Graciela S.Lorda Facultad de Ciencias Exactas y Naturales Universidad Nacional de La PampaRuta Nacional 35km 330Santa RosaLa PampaCP6300Argentina INTA EEA Anguil“Ing.Agr.Guillermo Covas”ruta Nacional 5 km 580AnguilLa PampaCC116326Argentina

Beneﬁcial microbes can improve soil health by promoting soil structure,nutrient cycling,and disease *** addition,a wide array of rhizospheric microbes are responsible for producing metabolically active compounds including various types of plant growth ***,microbial biodiversity studies could contribute to the improvement of agricultural practices in deprived areas,such as the Pampean semiarid *** vast majority of studies conducted on endophytic microorganisms have focused on intensive crop legume *** contrast,little attention has been paid to microorganisms of native legumes,whose ecology is not directly affected by human *** this study,endophytic microorganisms isolated from root nodules of a selected native legume of the genus Rhynchosia were *** isolates were studied with a focus on their plant growth-pro-moting rhizobacteria(PGPR)*** the edaphic characteristics of the Pampean semiarid region,the isolates obtained were evaluated for their ability to grow under three salt stress conditions(50,100,and 200 mM NaCl)and four different pH values(6,7,8,and 9).Based on their PGPR activities,the selected strains were phylogenetically grouped using *** results showed great variability among the isolates in terms of the characteristics *** legumes manifested a wide endophytic variability and remarkable perfor-mance in PGPR *** conclude that they could be used as potential bioinoculants for legume cultivation,an excellent alternative to the use of chemical fertilizers that currently pollute the environment.

关键词： Native strains endophytes PGPR native legumes stress

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Impacts of different pancreatic resection ranges on endocrine function in Suncus murinus

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World Journal of Gastrointestinal Surgery 2024年第7期16卷 2308-2318页

作者： ru-Jia Li Ting Yang Yu-Hao Zeng Yutaro Natsuyama Ke Ren Jun Li Yuichi Nagakawa Shuang-Qin Yi Department of Frontier Health Sciences Graduate School of Human Health SciencesTokyo Metropolitan UniversityTokyo 116-8551Japan Faculty of Physical Education Qujing Normal UniversityQujing 655000Yunnan ProvinceChina School of Medicine Shanghai Cancer InstituteShanghai Jiao Tong UniversityShanghai 200240China Department of Gastrointestinal and Pediatric Surgery Tokyo Medical UniversityTokyo 160-0023Japan

BACKGROUND Surgical intervention involving the pancreas can lead to impaired glucose tolerance and other types of endocrine *** scope of pancreatectomy and whether it includes the ventral pancreas are the key factors in the development of postoperative *** ventral and dorsal pancreases are almost separated in Suncus murinus(***).AIM To investigate the effects of different extents of pancreatic resection on endocrine function in *** Eight-week-old male *** shrews were randomly divided into three experimental groups according to different pancreatic resection ranges as follows:ventral pancreatectomy(VPx)group;partial pancreatectomy(PPx)group;subtotal pancreatectomy(SPx)group;and a sham-operated *** serum insulin,glucagon-like peptide-1(GLP-1),pancreatic polypeptide(PP),and somatostatin(SST)levels,as well as food intake,weight,blood glucose,and glucose tolerance were regularly measured for each *** *** treated with PPx and SPx suffered from varying degrees of impaired glucose tolerance,but only a small proportion of the SPx group developed *** *** in the SPx group showed a significant decrease in food intake accompanied by severe weight loss,as well as a significant increase in postprandial serum GLP-1 *** serum PP levels decreased in both the VPx and PPx groups,but not in the SPx *** serum SST levels decreased in both VPx and PPx groups,but the decrease was *** Severe weight loss after pancreatectomy may be related to loss of appetite caused by compensatory elevation of *** and GLP-1 may play a role in resisting blood glucose imbalance.

关键词： Pancreatectomy Glucose homeostasis Endocrine dysfunction Glucagon-like peptide-1 Pancreatic polypeptide

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Conditioning treatments mitigate the levels of fecal pollution indicators in soil during land-application of sewage sludge

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Science China Technological Sciences 2024年

作者： WANG YuHang LI Hua FANG WenHao WANG ru WANG XinXin ZHENG GuanYu ZHOU LiXiang Department of Environmental Engineering College of Resources and Environmental Sciences Nanjing Agricultural University College of Materials and Chemical Engineering Pingxiang University Jiangsu Collaborative Innovation Center for Solid Organic Waste Resource Utilization

Sewage sludge is a major source of fecal pathogens in the environment, and its application to land can result in a significant release of these pathogens into the soil. While conditioning treatments are crucial for improving the dewatering process of sludge, their impact on the presence and behavior of fecal pathogens in soil remains unclear. This study aims to assess four extraction methods for recovering fecal pollution indicators from soil amended with unconditioned and conditioned sludge. The indicators include Escherichia coli(EC), human-specific HF183 Bacteroides(HF183), human adenovirus(HAdV), human BK polyomavirus(BKPyV), human JC polyomavirus(JCPyV), and cross-assembly phage(crAssphage). This study also examines how soil moisture content affects the decay of these fecal pollution indicators in soil amended with raw sludge and investigates the influence of conditioning treatments with cationic polyacrylamide(PAM), Fenton's reagents, Fe[III]/CaO on their persistence in soil. The results indicated that the direct extraction method was the most effective and unbiased for recovering fecal pollution indicators from sludge-amended soil compared with the three elution-concentration methods. All fecal pollution indicators, except HAdV, remained stable under dry soil conditions, while high soil moisture content(48.39%-53.14%) slowed the decay rates of these indicators. During the application of sludge to soil, effective control of fecal pollution indicators was observed, with JCPyVand HAdV becoming undetectable within a short period. The log reduction values of HF183, BKPyV, and crAssphage ranged from 0.1 to 2.8 logs after 30 d of cultivation. The application of conditioned sludge, especially Fenton's reagent-conditioned sludge, resulted in a reduction in human fecal contamination in the receiving soil. Therefore, implementing appropriate conditioning methods, such as using Fenton's reagent, can effectively mitigate the health risks associated with fecal pathogens.

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Solar-driven photothermal catalytic CO_(2) conversion:a review

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Rare Metals 2024年第7期43卷 2913-2939页

作者： Bachirou Guene Lougou Bo-Xi Geng ru-Ming Pan Wei Wang Tian-Tian Yan Fang-Hua Li Hao Zhang Oraléou SanguéDjandja Yong Shuai Meisam Tabatabaei Daniel Sabi Takou School of Energy Science and Engineering Harbin Institute of TechnologyHarbin 150001China MIIT Key Laboratory of Critical Materials Technology for New Energy Conversion and Storage Harbin Institute of TechnologyHarbin 150001China State Key Laboratory of Urban Water Resource and Environment Harbin Institute of TechnologyHarbin 150090China School of Electrical Engineering and Automation Harbin Institute of TechnologyHarbin 150001China Guangdong Provincial Key Laboratory of Distributed Energy Systems Engineering Research Center of None-Food Biomass Efficient Pyrolysis and Utilization Technology of Guangdong Higher Education InstitutesDongguan University of TechnologyDongguan 523808China Higher Institution Centre of Excellence(HICoE) Institute of Tropical Aquaculture and Fisheries(AKUATROP)Universiti Malaysia Terengganu21030 Kuala NerusMalaysia Department of Biomaterials Saveetha Dental CollegeSaveetha Institute of Medical and Technical SciencesChennai600077India école Polytechnique d'Abomey-Calavi University of Abomey-Calavi2009CotonouBenin

It is highly desirable to seek green and sustainable technologies,such as employing photo thermal effects to drive energy catalysis processes to address the high energy demand and associated environmental impacts induced by the current *** photothermocatalysis process is an emerging research area with great potential in efficiently converting solar energy through various catalytic ***,achieving simultaneously high conversion efficiency,cyclability,and durability is still a daunting ***,tremendous work is still needed to enhance solar photo thermal catalytic conversion and promote its large-scale *** review developed the principles of coupling solar photon and thermal fields underlying the photothermal effect,exploration of efficient nanocatalysts,development of optofluidic reactor model,and photo thermal synergistic-driven CO_(2) reduction *** ultimate goal was to provide an effective approach that can effectively convert solar energy into photocarriers/hot-electrons and heat,and importantly,can couple them to regulate catalysis reaction pathways toward the production of value-added fuel and chemical energy.

关键词： Photochemistry Photothermal CO_(2)catalytic conversion Nanomaterial Solar fuels and chemicals

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推动构建新时代历史理论研究“三大体系”——第三届新时代史学理论论坛综述

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史学理论研究 2024年第1期 151-156页

作者：宋儒中国社会科学院历史理论研究所 100101

2023年8月30-31日,第三届新时代史学理论论坛在吉林长春举行。本届论坛的主题是“唯物史观视域下的中国历史理论构建”,旨在深入学习贯彻党的二十大精神和习近平总书记在文化传承发展座谈会上的重要讲话精神,围绕“两个结合”的重大意义... 详细信息

2023年8月30-31日,第三届新时代史学理论论坛在吉林长春举行。本届论坛的主题是“唯物史观视域下的中国历史理论构建”,旨在深入学习贯彻党的二十大精神和习近平总书记在文化传承发展座谈会上的重要讲话精神,围绕“两个结合”的重大意义,建设中华民族现代文明,加强新时代历史理论研究学术体系、学科体系、话语体系(以下简称“三大体系”)建设等问题开展学术探讨、凝聚理论共识。

关键词：史学理论学术体系吉林长春学术探讨现代文明三大体系论坛综述学科体系

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吴门、松江、海上——从“文人书画”到“金石书画”

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南京艺术学院学报（美术与设计） 2024年第1期 33-38页

作者：林如浙江大学艺术与考古学院浙江杭州310028

从“吴门”到“松江”“扬州”再到“海上”,书画风格完成了从清新雅淡至金石意趣的创新突破,是“文人书画”到“金石书画”的转变,文人书画家的身份也从“专家型”到“职业、行业型书画家”转换。本文以经济发展中心迁移、商品经济发... 详细信息

从“吴门”到“松江”“扬州”再到“海上”,书画风格完成了从清新雅淡至金石意趣的创新突破,是“文人书画”到“金石书画”的转变,文人书画家的身份也从“专家型”到“职业、行业型书画家”转换。本文以经济发展中心迁移、商品经济发展模式变化对书画市场、受众、书画家身份的影响等角度来探讨这一书画审美风尚变迁的社会原因。

关键词：吴门松江海上文人书画金石书画

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以大食物观保障粮食安全:互动机理、逻辑溯源与时代意旨

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西北农林科技大学学报（社会科学版） 2024年第4期24卷 63-73页

作者：贾如首都师范大学马克思主义学院北京100089

大食物观作为新时代保障国家粮食安全的新思路,对标粮食安全内涵主线中数量、来源、质量、能力四重向度,以我国自然资源禀赋为依托,以满足人民食物消费需求升级为旨归,以“多位一体”高质量发展内核为动力,为端牢中国饭碗提供了科学指... 详细信息

大食物观作为新时代保障国家粮食安全的新思路,对标粮食安全内涵主线中数量、来源、质量、能力四重向度,以我国自然资源禀赋为依托,以满足人民食物消费需求升级为旨归,以“多位一体”高质量发展内核为动力,为端牢中国饭碗提供了科学指引。梳理以大食物观保障粮食安全的逻辑思路,使我们深刻领会马克思主义食物观的真理价值,准确把握中国共产党粮食安全认知的跃升转型,清醒认识“两个大局”下优化粮食安全理念的紧迫现实。大食物观内蕴的现代化要素、社会主义性质、人类文明性同中国式现代化的科学内涵在底层逻辑上高度耦合,决定了树立大食物观夯实粮食安全根基是实现中国式农业现代化,进而推动我国建成社会主义现代化强国的重要支撑和必由之路。

关键词：大食物观粮食安全互动机理逻辑溯源时代意旨

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Physiological,transcriptome and gene functional analysis provide novel sights into cadmium accumulation and tolerance mechanisms in kenaf

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Journal of Environmental Sciences 2024年第3期137卷 500-514页

作者： Shan Cao Meng Wang Jiao Pan Dengjie Luo Samavia Mubeen Caijin Wang Jiao Yue Xia Wu Qijing Wu Hui Zhang Canni Chen Muzammal Rehman Sichen Xie ru Li Peng Chen Guangxi Key Laboratory of Agro-environment and Agric-products safety Key Laboratory of Plant Genetics and BreedingCollege of AgricultureGuangxi UniversityNanning 530004China State Key Laboratory for Conservation and Utilization of Subtropical Agro-bioresources College of Life Science and TechnologyGuangxi UniversityNanning 530004China

Kenaf is considered to have great potential for remediation of heavy metals in ***,studies on molecular mechanisms of root Cd accumulation and tolerance are still *** this study,two differently tolerant kenaf cultivars were selected as materials and the physiological and transcriptomic effects were evaluated under Cd *** study showed that 200μmol/L CdCl_(2) treatment triggered the reactive oxygen species(ROS)explosion and membrane lipid *** with the Cd-sensitive cultivar‘Z',the Cd-tolerant cultivar‘F'was able to resist oxidative stress in cells by producing higher antioxidant enzyme activities and increasing the contents of ascorbic acid(AsA)and glutathione(GSH).The root cell wall of‘F'exhibited higher polysaccharide contents under Cd treatment,providing more Cd-binding *** were 3,439 differentially expressed genes(DEGs)that were co-regulated by Cd treatment in two *** biosynthesis and plant hormone signal transduction pathways were significantly enriched by functional annotation *** associated with pectin,cellulose,and hemi-cellulose metabolism were involved in Cd chelation of root cell wall;V-ATPases,ABCC3 and Narmp3 could participated in vacuolar compartmentalization of Cd;PDR1 was responsible for Cd effux;the organic acid transporters contributed to the absorption of Cd in *** genes might have played key roles in kenaf Cd tolerance and Cd ***,HcZIP2 was identified to be involved in Cd uptake and transport in *** findings provide a deeper understanding of the molecular pathways underlying Cd accumulation and detoxification mechanisms in kenaf.

关键词： Kenaf Cd stress Physiological Transcriptome HcZIP2

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情感的流动:教师热情对青少年阅读乐趣的影响机制研究——基于PISA(2018)数据的多层次模型探析

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教师教育研究 2024年第3期36卷 60-67页

作者：汪茹南京大学教育研究院江苏南京210023

在综合前人研究的基础上,探讨了教师热情对学生阅读乐趣的影响机制,并应用多层次分析的方法重点考察了学校层次因素的调节作用。通过分析PISA 2018数据,发现个体感知的教师学科热情、教学热情与学生阅读乐趣之间存在显著正向关系,异质... 详细信息

在综合前人研究的基础上,探讨了教师热情对学生阅读乐趣的影响机制,并应用多层次分析的方法重点考察了学校层次因素的调节作用。通过分析PISA 2018数据,发现个体感知的教师学科热情、教学热情与学生阅读乐趣之间存在显著正向关系,异质性分析结果显示此影响效应对于弱势学生群体来说更为凸显,教师支持在教师热情与阅读乐趣间发挥着部分中介作用。而在学校层次,教师学科热情氛围对学生阅读乐趣产生显著正向影响,且进一步分析揭示了学校层次的氛围变量存在着跨层的正向调节效应。为此,培养学生的阅读乐趣需提高教师的学科与教学热情,培育和维护一个充满热情的教师教科研环境,多途径发展教师提供学习支持的能力。

关键词：教师热情情绪濡染学习情绪多层析分析

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