检索结果-南通市图书馆

CO hydrogenation conversion driven by micro-environments of active sites over iron carbide catalysts

在线全文

同方期刊数据库

学校读者我要写书评

暂无评论

Green Energy & Environment 2025年第2期10卷 367-373页

作者： Nan Song Xingxing Li Ebtihal Abograin Wenyao Chen junbo cao jing Zhang De Chen Xuezhi Duan Xinggui Zhou State Key Laboratory of Chemical Engineering East China University of Science and Technology130 Meilong RoadShanghai200237China Department of Chemical Engineering Norwegian University of Science and TechnologyTrondheim7491Norway

Essentially clearing the structure-activity relationship between iron carbide catalysts involving multiple active centers to understand the reaction mechanism of CO hydrogenation conversion process is still a great ***,two main micro-environment factors,namely electronic properties and geometrical effects were found to have an integrated effect on the mechanism of CO hydrogenation conversion,involving active sites on multiple crystal *** Bader charge of the surface Fe atoms on the active sites had a guiding effect on the CO activation pathway,while the spatial configuration of the active sites greatly affected the energy barriers of CO *** the defective surfaces were more conducive to CO activation,the defective sites were not the only sites to dissociate CO,as CO always tended to dissociate in a wider *** synergistic effect of the micro-environment also occurred during the CO conversion *** C atoms on relatively flat configurations were more likely to form methane,while the electronic properties of the active sites could effectively describe the C-C coupling process,as well as distinguish the coupling mechanisms.

关键词： Micro-environment CO hydrogenation conversion Electronic property Local environment Synergistic effect

Integrating well logs, 3D seismic, and earthquake data for comprehensive prediction of 3D in-situ stress orientations: A case study from the Weiyuan area in the Sichuan Basin, China

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Petroleum Science 2025年第1期22卷 210-221页

作者： Huan cao Yang Zhao Hai-Chao Chen Le-Le Zhang Cheng-Gang Xian ji-Dong Yang Lu Liu State Key Laboratory of Petroleum Resources and Engineering and Unconventional Petroleum Research Institute China University of Petroleum (Beijing) Department of Geophysics China University of Petroleum (East China) Aramco Beijing Research Center Aramco Asia

Determining the orientation of in-situ stresses is crucial for various geoscience and engineering applications. Conventional methods for estimating these stress orientations often depend on focal mechanism solutions(FMSs) derived from earthquake data and formation micro-imager(FMI) data from well ***, these techniques can be costly, depth-inaccurate, and may lack spatial coverage. To address this issue, we introduce the use of three-dimensional(3D) seismic data(active sources) as a lateral constraint to approximate the 3D stress orientation field. Recognizing that both stress and fracture patterns are closely related to seismic velocity anisotropy, we derive the orientation of azimuthal anisotropy from multi-azimuth 3D seismic data to compensate for the lack of spatial stress orientation information. We apply our proposed workflow to a case study in the Weiyuan area of the Sichuan Basin, China, a region targeted for shale gas production. By integrating diverse datasets, including 3D seismic, earthquakes, and well logs, we develop a comprehensive 3D model of in-situ stress(orientations and magnitudes). Our results demonstrate that the estimated anisotropy orientations from 3D seismic data are consistent with the direction of maximum horizontal principal stress(SHmax) obtained from FMIs. We analyzed 12earthquakes(magnitude > 3) recorded between 2016 and 2020 for their FMSs and compressional axis(Paxis) orientations. The derived SHmax direction from our 3D stress model is 110°ES(East-South), which shows excellent agreement with the FMSs(within 3.96°). This close alignment validates the reliability and precision of our integrated method for predicting 3D SHmax orientations.

关键词： In-situ stress orientation SHmax Azimuthal velocity anisotropy Focal source mechanism Formation micro-imager

Advancing the recovery of iron and rare earth elements from the solid waste at Bayan Obo

在线全文

同方期刊数据库

学校读者我要写书评

暂无评论

International journal of Mining Science and Technology 2025年第2期35卷 295-306页

作者： Na Zhao Qiang Zhang Hongwei Ma Yongsheng Sun Peng Gao Zhao cao Zhenyue Zhang School of Resources and Civil Engineering Northeastern UniversityShenyang 110819China Mineral Processing Plant of jinchuan Group Nickel Cobalt Co. Ltd.Jinchang 737100China School of Mining and Coal Engineering Inner Mongolia University of Science and TechnologyBaotou 014010China School of Chemistry and Environmental Engineering Wuhan Institute of TechnologyWuhan 430074China

The storage of solid waste in Bayan Obo has resulted in significant resource wastage and environmental *** this study,an efficient process was developed to recover iron and rare earth elements(REEs)from this waste by processes of hydrogen-based mineral phase transformation(HMPT),magnetic separation,and *** optimal HMPT conditions(525℃,12.5 min,and 30%H_(2)concentration),an iron concentrate with a TFe grade of 64.09%and a recovery of 95.33%was *** magnetic properties of the solid waste were greatly enhanced by HMPT,allowing the effective magnetic separation of iron *** optimization of the flotation process resulted in a REEs concentrate with a rare earth oxide(REO)grade of 65%-70%and a REEs recovery of 60%-65%.Hematite was reduced to magnetite during HMPT,and bastnaesite was decomposed to REEs oxides and fluorides,and the particle structure was significantly ***,changes in monazite,fluorite,and barite were minimal.

关键词： Hydrogen-based mineral phase transformation Flotation Reduction characteristics Microstructure evolution Surface chemistry

Ammonia-induced CuO/13X for H_(2)S removal from simulated blast furnace gas at low temperature

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Green Energy & Environment 2025年第1期10卷 139-149页

作者： Erping cao Yuhua Zheng Hao Zhang jianshan Wang Yuran Li Tingyu Zhu Zhan-guo Zhang Guangwen Xu Yanbin Cui State Key Laboratory of Mesoscience and Engineering Institute of Process EngineeringChinese Academy of SciencesBeijing100190China State Key Laboratory of Vanadium and Titanium Resources Comprehensive Utilization PanGang Group Research Institute Co.Ltd.Panzhihua Sichuan617000China Shenyang University of Chemical Technology Shenyang110142China University of Chinese Academy of Sciences Beijing 100049China

Blast furnace gas(BFG)is an important by-product energy for the iron and steel industry and has been widely used for heating or electricity ***,the undesirable contaminants in BFG(especially H_(2)S)generate harmful environmental *** desulfurization of BFG is urgent for integrated steel plants due to the stringent ultra-low emission *** with other desulfurization materials,zeolite-based adsorbents represent a viable option with low costs and long service *** this study,an ammonia-induced CuO modified 13X adsorbent(NH_(3)–CuO/13X)was prepared for H_(2)S removal from simulated BFG at low *** XRD,H_(2)-TPR and TEM analysis proved that smaller CuO particles were formed and the dispersion of Cu on the surface of 13X zeolite was improved via the induction of *** on H_(2)S adsorption performance of the adsorbent was carried out using simulated BFG,and the results showed that NH_(3)–CuO/13X-3 has better breakthrough sulfur capacity,which was more than twice the sulfur capacity of CuO/*** is proposed that the enhanced desulfurization performance of NH_(3)–CuO/13X is attributed to an abundant pore of 13X,and combined action of 13X and *** work provided an effective way to improve the sulfur capacity of zeolite-based adsorbents via impregnation method by ammonia induction.

关键词： Blast furnace gas Desulfurization Ammonia-induced CuO 13X zeolite

维普期刊数据库

Surface controllable wettability using amphiphilic rotaxane molecular shuttles

在线全文

学校读者我要写书评

暂无评论

Chinese Chemical Letters 2025年第2期36卷 422-425页

作者： Dongpu Wu Zheng Yang Yuchen Xia Lulu Wu Yingxia Zhou caoyuan Niu Puhui Xie Xin Zheng Zhanqi cao College of Science Henan Agricultural University

Herein,an alkyne-terminated acid/base responsive amphiphilic [2]rotaxane shuttle was synthesized,and then modified onto the glass surface through “click” *** XPS N 1s spectrum and contactangle measurement were performed to prove the successful *** amphiphilic [2]rotaxane functionalized surface presented controllable wettability responding to external acid-base *** bistable rotaxane modified material system promoted the practical application of molecular machines.

关键词： Amphiphilic rotaxane Controllable wettability Stimuli-responsive

Predicting the efficiency of arsenic immobilization in soils by biochar using machine learning

在线全文

同方期刊数据库

学校读者我要写书评

暂无评论

journal of Environmental Sciences 2025年第1期147卷 259-267页

作者： jin-Man cao Yu-Qian Liu Yan-Qing Liu Shu-Dan Xue Hai-Hong Xiong Chong-Lin Xu Qi Xu Gui-Lan Duan State Key Lab of Urban and Regional Ecology Research Center for Eco-Environmental SciencesChinese Academy of SciencesBeijing 100085China Henan Institute of Advanced Technology Zhengzhou UniversityZhengzhou 450052China University of Chinese Academy of Sciences Beijing 100049China

Arsenic(As)pollution in soils is a pervasive environmental *** immobilization offers a promising solution for addressing soil As *** efficiency of biochar in immobilizing As in soils primarily hinges on the characteristics of both the soil and the ***,the influence of a specific property on As immobilization varies among different studies,and the development and application of arsenic passivation materials based on biochar often rely on empirical *** enhance immobilization efficiency and reduce labor and time costs,a machine learning(ML)model was employed to predict As immobilization efficiency before biochar *** this study,we collected a dataset comprising 182 data points on As immobilization efficiency from 17 publications to construct three ML *** results demonstrated that the random forest(RF)model outperformed gradient boost regression tree and support vector regression models in predictive *** importance analysis and partial dependence plots based on the RF model were conducted to identify the most crucial factors influencing As *** findings highlighted the significant roles of biochar application time and biochar pH in As immobilization efficiency in ***,the study revealed that Fe-modified biochar exhibited a substantial improvement in As *** insights can facilitate targeted biochar property design and optimization of biochar application conditions to enhance As immobilization efficiency.

关键词： Biochar Arsenic immobilization Soil Machine learning

Human cardiac organoid model reveals antibacterial triclocarban promotes myocardial hypertrophy by interfering with endothelial cell metabolism

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Science Bulletin 2025年第3期70卷 342-346页

作者： Nana Yang jiahong Chen Yujie Zhu Wenxin Shan Zheng cao Yiwen Fu Huanhuan cao Yanyan Li Yukun Xiang Shusi Ding Huiqing Wang Yaobo Zhao Liang ji Rui Zhan Yufei Wu Zhaomeng Wang Manyuan Dong Lemin Zheng School of Bioscience and Technology Weifang Key Laboratory of Animal Model Research on Cardiovascular and Cerebrovascular DiseasesShandong Second Medical UniversityWeifang 261053China The Institute of Cardiovascular Sciences and Institute of Systems Biomedicine School of Basic Medical SciencesState Key Laboratory of Vascular Homeostasis and RemodelingNHC Key Laboratory of Cardiovascular Molecular Biology and Regulatory PeptidesBeijing Key Laboratory of Cardiovascular Receptors ResearchHealth Science CenterPeking UniversityBeijing 100191China University of Chinese Academy of Sciences Beijing 100049China Beijing Tiantan Hospital China National Clinical Research Center for Neurological DiseasesAdvanced Innovation Center for Human Brain ProtectionBeijing Institute of Brain DisordersThe Capital Medical UniversityBeijing 100050China Research Center for Cardiopulmonary Rehabilitation University of Health and Rehabilitation Sciences Qingdao Hospital(Qingdao Municipal Hospital)School of Health and Life SciencesUniversity of Health and Rehabilitation SciencesQingdao 266071China

Environmental pollution is an important but often overlooked risk factor for cardiovascular diseases such as heart ***(3,4,4′-trichlorocarbanilide,TCC)is a broad-spectrum antibacterial agent commonly used in personal care products such as antibacterial soaps,detergents,toothpaste,and cosmetics[1].Unfortunately,due to its widespread use,TCC has become one of the top ten most common water pollutants globally,and it is present in the atmosphere,soil,and aquatic sediments[2].

关键词： metabolism cardiovascular diseases

WRKY10 and ABF1/2 bind to VQ8 to form an accelerator-brake module for the regulation of dark- and ABA-induced leaf senescence in rice

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Crop journal 2025年第1期13卷 145-157页

作者： Chen, Sique Yang, Xianfeng cao, Hongrui Huang, Baolin Zheng, Xiujuan Xie, Wenjia Liang, Kangjing Sun, Xinli Key Laboratory of Ministry of Education for Genetics Breeding and Multiple Utilization of Crops College of Agriculture Fujian Agriculture and Forestry University Fujian Fuzhou 350002 China Key Laboratory of Crop Breeding in South Zhejiang Key Laboratory of Wenzhou Endemic Crop Biotechnology Innovation Wenzhou Vocational College of Science & Technology/Wenzhou Academy of Agricultural Sciences Zhejiang Wenzhou 325006 China

Transcription factors (TFs) play key roles in the regulatory network of leaf senescence. However, many nodes in this network remain unclear. To elucidate the mechanism of leaf senescence mediated by a rice TF, WRKY10, the expression of multiple senescence-related genes and physiological phenotypes were monitored in WRKY10- and VQ MOTIF-CONTAINING PROTEIN8 (VQ8)-overexpressing plants and the wrky10 and vq8 mutants. Our results showed that WRKY10 positively regulates abscisic acid (ABA)- and dark-induced senescence (DIS) by directly regulating the expression of multiple senescence-related genes. The VQ8 protein, a repressor of WRKY10, negatively regulates WRKY10-mediated DIS. The WRKY10-VQ8 module fine-tunes the progression of DIS. ABA, methyl jasmonate, and H2O2 accelerate WRKY10-mediated DIS, whereas ammonium nitrate and dithiothreitol delay WRKY10-mediated DIS. Further analysis revealed that WRKY10 and VQ8 interact with ABA RESPONSIVE ELEMENT BINDING FACTOR1 (ABF1) or ABF2. VQ8 represses the transcriptional activity of ABF1 and ABF2. Overexpression of ABF1 or ABF2 accelerates ABA- and dark-induced senescence and H2O2 accumulation in N. benthamiana leaves, and WRKY10 and VQ8 can inhibit either ABF1- or ABF2-induced cell necrosis. Taken together, WRKY10 integrates multiple senescence signals to establish an orderly progression of leaf senescence. The VQ8 protein acts as a brake on WRKY10-induced senescence and ABF1/2-induced cell death, preventing uncontrolled cell death. © 2025 Crop Science Society of China and Institute of Crop Science, CAAS

关键词： ABA Darkness Leaf senescence Oryza sativa WRKY10-VQ8 module

Electroacupuncture alleviates zymosan-induced colorectal hypersensitivity

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

journal of Traditional Chinese Medicine 2025年第1期45卷 32-38页

作者： LI Siting WANG Shaojun YIN Yehui DE Gejing LI Caicai WANG Ziyan cao Wenjie Institute of Acupuncture and Moxibustion China Academy of Chinese Medical Sciences Institute of Chinese Materia Medica China Academy of Chinese Medical Sciences

OBjECTIVE: this study to investigate the mechanism underlying the electroacupuncture(EA) alleviates colorectal hypersensitivity, a feature of irritable bowel syndrome(IBS). METHODS: The colorectal hypersensitivity model was established by treating mice with zymosan. Electrophysiological techniques, Western blotting and immunofluorescence staining were used to detect the changes of the sensitive state of the colorectum and the response in spinal ganglion and spinal cord after acupuncture intervention. RESULTS: colorectal distension studies revealed that repetitive applied electroacupuncture treatment on mice could significant alleviates colorectal intensity. Western blotting studies with nerve growth factor(NGF) in the colorectum, substance P(SP) in the spinal ganglion, protein kinase C gamma(PKCγ) in the spinal cord, and transient receptor potential vanilloid 1(TRPV1) showed that electroacupuncture suppressed zymosan-induced expression of TRPV1, NGF and SP in multiple tissues. Immunofluorescence labeling results showed that EA attenuated the expression of NGF in the colorectum, SP in the spinal ganglion, PKCγ in the spinal cord, and TRPV1 in all three tissues in zymosan-treated mice. Moreover, the number of neurons double-positive for TRPV1/Isolectin B4(IB4) and TRPV1/Neurofilament(NF) 200 was increased in the spinal ganglion. CONCLUSION: these results provide molecular-level evidence that EA alleviates zymosan-induced colorectal hypersensitivity by altering the expression of pain-associated proteins in the colorectum and spinal cord. EA has a potential to be therapeutic intervention option for IBS treatment.

关键词： colorectal hypersensitivity electroacupuncture nerve growth factor protein kinase C gamma substance P transient receptor potential channels

同方期刊数据库