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Application status and research progress of CO_(2) fracturing fluid in petroleum engineering:A brief review

Petroleum 2024年第1期10卷 1-10页

作者： Jinzhou Zhao Tong Wu Wanfen pu Du Daijun Qingyuan Chen Bowen Chen Jintao Li Yitao Huang State Key Laboratory of Oil and Gas Reservoir Geology and Exploitation Southwest Petroleum UniversityChengdu610500People's Republic of China Shale Gas Research Institute of PetroChina Southwest Oil&Gas Field Company Chengdu610051People's Republic of China

This paper comprehensively reviews the application and research progress of CO_(2) fracturing fluids in China,highlights the existing issues and puts forward suggestions for future *** types of fracturing fluid systems containing CO_(2),namely,CO_(2) dry fracturing fluid,CO_(2) energized fracturing fluid,and CO_(2) foam fracturing fluid,are categorized based on the mass ratio and process difference between CO_(2),water,and treatment *** applications in China reveal several problem to be resolved:(1)The application scope of CO_(2) fracturing fluids is restricted to depleted reservoirs,re-fracturing of old wells,and medium-deep reservoirs with low formation pressure coefficients;(2)different types of CO_(2) fracturing fluids require different processes and ground supporting equipment;(3)optimization of CO_(2) compatibility,functionality,temperature and salt tolerance,as well as the cost of treatment agents is necessitated;(4)existing CO_(2) fracturing fluid system fail to perform well with low friction,low filtration,and high sand-carrying capacity.(5)there lacks a targeted industry standard for evaluation of performance of CO_(2) fracturing fluid system and treatment ***,in order to meet the goals of CCUS-EOR,CCUS-EGR,or integration of fracturing,displacement and burial by CO_(2),efforts should be made in the aspects that followed,including in-depth investigation of the mechanism of CO_(2) fracturing fluids,the adaptability and compatibility between existing equipment,different CO_(2) fracturing fluid systems and processes,and construction of treatment agents,low-density proppants and highperformance systems of recyclability and *** addition,optimization of CO_(2) fracturing fluid system based fracturing design is also crucial taking such related factors such as overall reservoir geological conditions,petrophysical properties,CO_(2) transportation,and well site layout into consideration.

关键词： Reservoir reconstruction CO_(2)fracturing fluid Fracturing fluid system Fracturing displacement burial integration

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Inhibitory effect of procyanidin B2 and tannin acid on cholesterol esterase and their synergistic effect with orlistat

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Food Science and Human Wellness 2024年第1期13卷 360-369页

作者： Xiangxin Li Yijing pu Haitao Jiang Wenxiao Jiao Wenjun Peng Wenli Tian Weibo Jiang Xiaoming Fang Institute of Apicultural Research Chinese Academy of Agricultural SciencesBeijing 100093China College of Food Science and Nutritional Engineering China Agricultural UniversityBeijing 100083China College of Food Science and Engineering Qilu University of Technology(Shandong Academy of Sciences)Jinan 250353China

This study was aimed to analyze the effect of procyanidin B2(PC)and tannin acid(TA)on the activities of cholesterol esterase(CEase)and the inhibitory mechanisms of enzymatic *** interaction mechanisms were investigated by enzymatic kinetics,multi-spectroscopy methods,thermodynamics analysis,molecular docking,and dynamic *** and TA could bind with CEase and inhibit the activity of enzyme in a mixed-competitive manner and non-competitive manner,which was verified by molecular docking simulations and dynamics ***,PC and TA showed the synergistic inhibition with ***,UVvis and the thermodynamic analysis revealed that the complexes were formed from CEase and inhibitors by noncovalent *** revealed by the circular dichroism results,both PC and TA decreased enzymatic activities by altering the conformations of *** inhibition of PC and TA on CEase might be one mechanism for its cholesterol-lowering effect.

关键词： Cholesterol esterase Polyphenols Interaction mechanisms Molecular dynamic simulation Synergistic effect

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Two UV organic-inorganic hybrid antimony-based materials with superior optical performance derived from cation-anion synergetic interactions

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Chinese Chemical Letters 2024年第9期35卷 442-446页

作者： pu Zhang Xiang Mao Xuehua Dong Ling Huang Liling Cao Daojiang Gao Guohong Zou College of Chemistry and Materials Science Sichuan Normal UniversityChengdu 610066China College of Chemistry Sichuan UniversityChengdu 610065China

Finding suitable strategies to effectively enhance the optical properties of materials are the goal being pursued by ***,cation-anion synergetic interactions strategy was proposed to develop two novel organic-inorganic hybrid antimony-based optical materials,(C_(3)H_(5)N_(2))Sb F_(2)SO_(4)(I)and(C_(5)H_(6)N)Sb F_(2)SO_(4)(Ⅱ),which were obtained by introducing Sb^(3+)cation containing stereochemically active lone-pair(SCALP)and organicπ-conjugated cations into sulphate *** synergistic interactions of the organicπ-conjugated cations,the inorganic[SbO_(2)F_(2)]^(3-)seesaw anions and the[SO_(4)]^(2-)distorted tetrahedra anions make their ultraviolet(UV)absorption edges approach 297 and 283 nm,respectively,and raise their birefringence up to 0.193@546 nm and 0.179@546 nm,***,although the two compounds have the same stoichiometric ratio and similar one-dimensional(1D)chain structure,they show opposite macroscopic symmetry,where the NCS compound(Ⅱ)exhibits a large secondharmonic generation(SHG)response(1.6 times that of KH_(2)PO_(4)).The two reported compounds are found to be promising UV optical materials in the experimental tests.

关键词： Antimony-based crystals Cation-anion synergetic interactions Large birefringence Short UV absorption edge Organic-inorganic hybrid Ionothermal synthesis

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Variation of microbiological and small molecule metabolite profiles of Nuodeng ham during ripening by high-throughput sequencing and GC-TOF-MS

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Food Science and Human Wellness 2024年第4期13卷 2187-2196页

作者： Cong Li Yingling Zou Guozhou Liao Zijiang Yang Dahai Gu Yuehong pu Changrong Ge Guiying Wang Livestock Product Processing and Engineering Technology Research Center of Yunnan Province Yunnan Agricultural UniversityKunming 650201China College of Food Science and Technology Yunnan Agricultural UniversityKunming 650201China

The internal microbial diversity and small molecular metabolites of Nuodeng ham in different processing years(the first,second and third year sample)were analyzed by high-throughput sequencing technology and gas chromatography-time of flight mass spectrography(GC-TOF-MS)to study the effects of microorganisms and small molecular metabolites on the quality of ham in different processing *** results showed that the dominant bacteria phyla of Nuodeng ham in different processing years were Proteobacteria and Firmicutes,the dominant fungi phyla were Ascomycota and Basidiomycota,while Staphylococcus and Aspergillus were the dominant bacteria and fungi of Nuodeng ham,***,252 kinds of small molecular metabolites were identified from Nuodeng ham in different processing years,and 12 different metabolites were screened through multivariate statistical *** metabolic pathway analysis showed that 23 metabolic pathways were related to ham fermentation,of which 8 metabolic pathways had significant effects on ham fermentation(Impact>0.01,P<0.05).The content of L-proline,phenyllactic acid,L-lysine,carnosine,taurine,D-proline,betaine and creatine were significantly positively correlated with the relative abundance of Staphylococcus and Serratia,but negatively correlated with the relative abundance of Halomonas,Aspergillus and Yamadazyma.

关键词： Nuodeng ham Microbial diversity Small molecule metabolites High-throughput sequencing Gas chromatography-time of flight mass spectrography

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Access to advanced sodium-ion batteries by presodiation:Principles and applications

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Journal of Energy Chemistry 2024年第5期92卷 162-175页

作者： Shihao Zhang Ruoyu Cao Xiangjun pu Along Zhao Weihua Chen Chunhua Song Yongjin Fang Yuliang Cao College of Chemistry and Molecular Sciences Hubei Key Laboratory of Electrochemical Power SourcesWuhan UniversityWuhan 430072HubeiChina College of Chemistry&Green Catalysis Center Zhengzhou UniversityZhengzhou 450001HenanChina Shenzhen Janaenergy techonulogy Co. Ltd.Shenzhen 518000GuangdongChina School of Chemistry and Chemical Engineering Jiangsu University of TechnologyChangzhou 213001JiangsuChina Zonergy Corporation NO.68 Fucang RoadYantan DistrictZigong 643030SichuanChina

Sodium-ion batteries(SIBs)are expected to offer affordability and high energy density for large-scale energy storage ***,the commercial application of SIBs is hurdled by low initial coulombic efficiency(ICE),continuous Na loss during long-term operation,and low sodium-content of cathode *** this scenario,presodiation strategy by introducing an external sodium reservoir has been rationally proposed,which could supplement additional sodium ions into the system and thereby markedly improve both the cycling performance and energy density of *** this review,the significance of presodiation is initially introduced,followed by comprehensive interpretation on technological properties,underlying principles,and associated approaches,as well as our perspectives on present inferiorities and future research ***,this contribution outlines a distinct pathway towards the presodiation methodology,of significance but still in its nascent phase,which may inspire the targeted guidelines to explore new chemistry in this field.

关键词： Presodiation Increased coulombic efficiency High reversible capacity Sodium ion batteries

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Engineering self-catabolic DNAzyme nanospheres for synergistic anticancer therapy

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Science China Chemistry 2024年第7期67卷 2412-2422页

作者： Yu Chen Yu Guo Jiaoli Wang Ruiting Liu Xiaohai Yang Kemin Wang Ying pu Hui Shi Jin Huang Key Laboratory of Chemo/Biosensing and Chemometrics College of Chemistry and Chemical EngineeringKey Laboratory for Bio-Nanotechnology and Molecular Engineering of Hunan ProvinceHunan UniversityChangsha 410082China National Clinical Research Center for Geriatric Disorders Department of GeriatricsXiangya HospitalCentral South UniversityChangsha 410008China

DNAzyme-based gene therapy faces some challenges including cell penetration,activity limitation,and co-delivery ***-assembled DNA nanomedicine has attracted widespread attention due to its many *** is urgent to develop a universal DNA degradation strategy for precise programmable drug ***,we reported a self-catabolic DNAzyme nanospheres(SCNS),which could simultaneously achieve cell penetration,activity enhancement,and co-delivery *** SCNS were assembled through Y-DNA stepwise hybridization with each other,which were then loaded with aptamer(Apt),doxorubicin(Dox),and zinc oxide nanoparticles(ZnO NPs).The acid-triggered dissociation of ZnO NPs leads to the generation of Zn^(2+)ions cofactors for immediately self-catabolic DNAzyme *** the disassembly of the SCNS,three types of anticancer treatments would be activated,which include Zn^(2+)involved reactive oxygen species(ROS),Dox-induced chemotherapy,and DNAzyme-based gene *** experimental results show that the nanoplatform(Apt-SCNS-Dox-ZnO)has a good tumor-killing effect and minimal side *** a smart self-driven drug delivery nanoplatform,it is anticipated to displace extraordinary potential in biomedicine and bioengineering.

关键词： DNAzyme nanosphere ZnO NPs ROS Dox anticancer therapy

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Shi-pi-xiao-ji formula suppresses hepatocellular carcinoma by reducing cellular stiffness through upregulation of acetyl-coA acetyltransferase 1

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World Journal of Gastrointestinal Oncology 2024年第6期16卷 2727-2741页

作者： Hui-Ying Jian Zi-Cheng Liang Huan Wen Zhen Zhang pu-Hua Zeng Graduate School Hunan University of Chinese MedicineChangsha 410208Hunan ProvinceChina Hunan Provincial Hospital of Integrated Traditional Chinese and Western Cancer Research Institute of Hunan Academy of Traditional Chinese MedicineHunan Academy of Chinese MedicineChangsha 410006Hunan ProvinceChina

BACKGROUND Previous studies have shown that the Shi-pi-xiao-ji(SPXJ)herbal decoction formula is effective in suppressing hepatocellular carcinoma(HCC),but the underlying mechanisms are not ***,this study investigated whether the antitumor effects of the SPXJ formula in treating HCC were mediated by acetyl-coA acetyltransferase 1(ACAT1)-regulated cellular *** a series of experiments,we concluded that SPXJ inhibits the progression of HCC by upregulating the expression level of ACAT1,lowering the level of cholesterol in the cell membrane,and altering the cellular stiffness,which provides a new idea for the research of traditional Chinese medicine against *** To investigate the anti-tumor effects of the SPXJ formula on the malignant progression of *** HCC cells were cultured in vitro with SPXJ-containing serum prepared by injecting SPXJ formula into wild-type *** apoptotic rate and proliferative,invasive,and migratory abilities of control and SPXJ-treated HCC cells were *** force microscopy was used to determine the cell surface morphology and the Young’s modulus values of the control and SPXJ-treated HCC *** membrane cholesterol levels in HCC cells were detected using the Amplex Red cholesterol detection ***1 protein levels were estimated using western *** Compared with the vehicle group,SPXJ serum considerably reduced proliferation of HCC cells,increased stiffness and apoptosis of HCC cells,inhibited migration and invasion of HCC cells,decreased plasma membrane cholesterol levels,and upregulated ACAT1 protein ***,treatment of HCC cells with the water-soluble cholesterol promoted proliferation,migration,and invasion of HCC cells as well as decreased cell stiffness and plasma membrane cholesterol levels,but did not alter the apoptotic rate and ACAT1 protein expression levels compared with the vehicle *** SPXJ formula inhibited proliferation,invasion,and migration

关键词： Shi-pi-xiao-ji formula Hepatocellular carcinoma Cellular stiffness Plasma membrane cholesterol level AcetylcoA acetyltransferase 1

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Two-dimensional Cr_(2)Cl_(3)S_(3)Janus magnetic semiconductor with large magnetic exchange interaction and high-T_(C)

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Chinese Physics B 2024年第9期33卷 481-485页

作者： Lei Fu Shasha Li Xiangyan Bo Sai Ma Feng Li Yong pu School of Science&New Energy Technology Engineering Laboratory of Jiangsu Provence Nanjing University of Posts and Telecommunications(NJUPT)Nanjing 210023China

The two-dimensional(2D)Janus monolayers are promising in spintronic device application due to their enhanced magnetic couplings and Curie *** der Waals CrCl_(3) monolayer has been experimentally proved to have an in-plane magnetic easy axis and a low Curie temperature of 17 K,which will limit its application in spintronic *** this work,we propose a new Janus monolayer Cr_(2)Cl_(3)S_(3) based on the first principles *** phonon dispersion and elastic constants confirm that Janus monolayer Cr_(2)Cl_(3)S_(3) is dynamically and mechanically *** Monte Carlo simulation results based on magnetic exchange constants reveal that Janus monolayer Cr_(2)Cl_(3)S_(3) is an intrinsic ferromagnetic semiconductor with TC of 180 K,which is much higher than that of CrCl_(3) due to the enhanced ferromagnetic coupling caused by S ***,the magnetic easy axis of Janus Cr_(2)Cl_(3)S_(3) can be tuned to the perpendicular direction with a large magnetic anisotropy energy(MAE)of 142eV/***,the effect of biaxial strain on the magnetic property of Janus monolayer Cr_(2)Cl_(3)S_(3) is *** is found that the Curie temperature is more robust under tensile *** work indicates that the Janus monolayer Cr_(2)Cl_(3)S_(3) presents increased Curie temperature and out-of-plane magnetic easy axis,suggesting greater application potential in 2D spintronic devices.

关键词： first-principles calculations 2D materials magnetic properties ferromagentic semiconductor

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Climate change filtered out resource-acquisitive plants in a temperate grassland in Inner Mongolia,China

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Science China(Life Sciences) 2024年第2期67卷 403-413页

作者： Heying Jing Xingshuo Xiong Feng Jiang Xucai pu Wenhong Ma Daijiang Li Zhongling Liu Zhiheng Wang Institute of Ecology and Key Laboratory for Earth Surface Processes of the Ministry of Education College of Urban and Environmental SciencesPeking UniversityBeijing 100871China Ministry of Education Key Laboratory of Ecology and Resource Use of the Mongolian Plateau School of Ecology and EnvironmentInner Mongolia UniversityHohhot 010021China Department of Biological Sciences Louisiana State UniversityBaton RougeLA 70803USA

Global climate change has led to the decline of species and functional diversity in ecosystems,changing community composition and ecosystem ***,we still know little about how species with different resource-use strategies(different types of resource usage and plant growth of plants as indicated by the spectrum of plant economic traits,including acquisitive resource-use strategy and conservative resource-use strategy)would change in response to climate change,and how the changes in the diversity of species with different resource-use strategies may influence community-level ***,using long-term(1982–2017)observatory data in a temperate grassland in Inner Mongolia,we investigated how climate change had affected the species richness(SR)and functional richness(FRic)for the whole community and for species with different resource-use ***,based on data for four traits representing leaf economics spectrum(leaf carbon concentration,leaf nitrogen concentration,leaf phosphorus concentration,and specific leaf area),we divided 81 plant species appearing in the grassland community into three plant functional types representing resource-acquisitive,medium,and resource-conservative *** then analyzed the changes in community-level productivity in response to the decline of SR and FRic at the community level and for different resource-use *** found that community-level SR and FRic decreased with drying climate,which was largely driven by the decline of diversity for resource-acquisitive ***,community-level productivity remained stable because resource-conservative species dominating this grassland were barely affected by climate *** study revealed distinctive responses of species with different resource-use strategies to climate change and provided a new approach based on species functional traits for predicting the magnitude and direction of climate change effects on ecosystem functions.

关键词： biodiversity ecological strategy functional diversity functional trait long-term change species diversity

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A review on the chemical speciation and influencing factors of heavy metals in Municipal Solid Waste landfill humus

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Waste Disposal and Sustainable Energy 2024年第2期6卷 209-218页

作者： Qiongyu Sun Bo Sun Defeng Wang Yuyuan pu Mingxiu Zhan Xu Xu Jinqing Wang Wentao Jiao College of Metrology and Measurement Engineering China Jiliang UniversityHangzhou 310018Zhejiang ProvinceChina Zhongke Hualu Soil Remediation Engineering Co. LtdDezhou 253011Shandong ProvinceChina Zhejiang Environmental Protection Group Co. LtdHangzhou 310020Zhejiang ProvinceChina Institute for Thermal Power Engineering Zhejiang UniversityHangzhou 310027Zhejiang ProvinceChina Research Center for Eco-Environmental Sciences Chinese Academy of SciencesHaidian District18 Shuangqing RoadBeijing 100085China

Heavy metal pollution in landfill humus can cause serious environmental problems and may endanger soil ecosystems and human *** biological toxicity of heavy metals is not only related to their total amount but also influenced to a greater extent by the distribution of their chemical *** the different chemical speciation and proportions of heavy metals can provide a more comprehensive and accurate understanding of the pollution characteristics and biological toxic-ity of heavy metals in landfill *** on a review of the relevant literature,this paper systematically summarizes the recent research status of typical heavy metal chemical speciation in landfill *** chemical speciation is diverse and *** instance,heavy metals in residual states and organically bound states have little impact on organisms,while heavy metals in exchangeable states and Fe-Mn oxide states can easily migrate and *** chemical speciation of heavy metals is affected by many factors,among which the soil pH and organic matter content are some of the most important ***,the existing gaps in the current research on the chemical speciation of heavy metals in landfills are described and future research directions are *** work provides a theoretical reference for researching the restoration of heavy metal-contaminated humus soil and the resource utilization of humus soil.

关键词： Landflls Humus soil containing heavy metal-Chemical speciation Distribution characteristics Influencing factors

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