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Journal of Materials Science & Technology 1996年第4期12卷 318-320页

作者： Lung, CW Jiang, JA zhang, ch International Centre for Materials Physics Institute of Metal Research Chinese Academy of Sciences Shenyang 110015 China

Applying the concept of multirange fractals, a new explanation to the Williford's multifractal curve on the relationship of fractal dimension with fracture properties in materials has been given. It shows the importance of factorizing out the effect of fractal structure from other physical causes and separating the appropriate range of scale from multirange fractals.

关键词： Fracture

Increased Oxygen Vacancies in CuO-ZnO Snowflake-like Composites Drive the Hydrogenation of CO_(2) to Methanol

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china Petroleum Processing & Petrochemical Technology 2024年第2期26卷 22-33页

作者： San Xiaoguang Wu Wanmeng zhang Lei Meng Dan chang Xiangshuang Tan Jianen Qi Jian College of chemical Engineering Shenyang University of Chemical TechnologyShenyang 110142China Shenyang Xinghua Aviation Electrical Appliances Co. Ltd.Shenyang 110023China Department of Prosthodontics PLA 964 HospitalChangchun 130000China State Key Laboratory of Biochemical Engineering Institute of Process EngineeringChinese Academy of SciencesBeijing 100190China

Cu/ZnO is widely used in the hydrogenation of carbon dioxide (CO_(2)) to methanol (ch_(3)OH) to improve the lowconversion rate and selectivity generally observed. In this work, a series of In, Zr, Co, and Ni-doped CuO-ZnO catalysts wassynthesized via a hydrothermal method. By introducing a second metal element, the activity and dispersion of the activesites can be adjusted and the synergy between the metal and the carrier can be enhanced, forming an abundance of oxygenvacancies. Oxygen vacancies not only adsorb CO_(2) but also activate the intermediates in methanol synthesis, playing a keyrole in the entire reaction. Co3O4-CuO-ZnO had the best catalytic performance (a CO_(2) conversion rate of 9.17%;a ch_(3)OHselectivity of 92.77%). This study describes a typical strategy for multi-component doping to construct a catalyst with anabundance of oxygen vacancies, allowing more effective catalysis to synthesize ch_(3)OH from CO_(2).

关键词： CuO-ZnO catalyst CO_(2)hydrogenation to ch_(3)OH doping oxygen vacancy synergy

Linearized waveform inversion for vertical transversely isotropic elastic media:Methodology and multi-parameter crosstalk analysis

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Petroleum Science 2024年第1期21卷 252-271页

作者： Ke chen Lu Liu Li-Nan Xu Fei Hu Yuan Yang Jia-Hui Zuo Le-Le zhang Yang Zhao National Key Laboratory of Petroleum Resources and Engineering Unconventional Petroleum Research InstituteChina University of Petroleum(Beijing)Beijing102249China Aramco Beijing Research Center Aramco AsiaBeijing100102China University of Lausanne LausanneCH-1015Switzerland Bureau of Geophysical Prospecting China National Petroleum CorporationZhuozhou 072750HebeiChina

Seismic migration and inversion are closely related techniques to portray subsurface images and identify hydrocarbon *** migration aims at obtaining structural images of subsurface geologic *** specifically,seismic migration estimates the reflectivity function(stacked average reflectivity or pre-stack angle-dependent reflectivity)from seismic reflection *** the other hand,seismic inversion quantitatively estimates the intrinsic rock properties of subsurface *** seismic inversion methods are applicable to detect hydrocarbon reservoirs that may exhibit lateral variations in the inverted *** there exist many differences,pre-stack seismic migration is similar with the first iteration of the general linearized seismic ***,seismic migration and inversion techniques assume an acoustic or isotropic elastic *** reservoirs such as shale and tight sand formation have notable anisotropic *** present a linearized waveform inversion(LWI)scheme for weakly anisotropic elastic media with vertical transversely isotropic(VTI)*** is based on two-way anisotropic elastic wave equation and simultaneously inverts for the localized perturbations(ΔVp_(0)/Vp_(0)/Vs_(0)/Vs_(0)/,Δ∈,Δδ)from the long-wavelength reference *** proposed VTI-elastic LWI is an iterative method that requires a forward and an adjoint operator acting on vectors in each *** derive the forward Born approximation operator by perturbation theory and adjoint operator via adjoint-state *** inversion has improved the quality of the images and reduces the multi-parameter crosstalk comparing with the adjoint-based *** have observed that the multi-parameter crosstalk problem is more prominent in the inversion images for Thomsen anisotropy ***,the Thomsen parameter is the most difficult to *** also analyze the multi-parameter crosstalk using scattering radiation patte

关键词： Elastic Anisotropy Least-squares imaging Waveform inversion Computational geophysics

Mitigating growth-stress tradeoffs via elevated TOR signaling in rice

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Molecular Plant 2024年第2期17卷 240-257页

作者： Wei Li Jiaqi Liu Zeqi Li Ruiqiang Ye Wenzhen chen Yuqing Huang Yue Yuan Yi zhang Huayi Hu Peng Zheng Zhongming Fang Zeng Tao Shiyong Song Ronghui Pan Jian zhang Jumim Tu Jen Sheen Hao Du State Key Laboratory of Rice Biology College of Agriculture and BiotechnologyZhejiang UniversityYu-Hang-Tang Road No.866Hangzhou 310058China ZJU-Hangzhou Global Scientific and Technological Innovation Center Zhejiang UniversityHangzhou 311215China Hainan Institute of Zhejiang University Sanya 572025China National Key Laboratory of Plant Molecular Genetics CASCenter for Excellence in Molecular Plant SciencesShanghai lnstitute of Plant Physiology and EcologyChineseAcademy of SciencesShanghai 200032China Key Laboratory of Plant Resource Conservation and Germplasm Innovation in Mountainous Region(Ministry of Education) College of Agricultural SciencesGuizhouUniversityGuiyang 550025China State Key Laboratory of Rice Biology and Breeding China National Rice Research InstituteHangzhou 311400China Department of Molecular Biology and Center for Computational and Integrative Biology Massachusetts General Hospitaland Department of GeneticsHarvard Medical SchoolBostonMA02114USA

Rice production accounts for approximately half of the freshwater resources utilized in agriculture,result-ing in greenhouse gas emissions such as methane(ch4)from flooded paddy *** address this chal-lenge,environmentally friendly and cost-effective water-saving techniques have become widely adopted in rice ***,the implementation of water-saving treatments(WsTs)in paddy-field rice has been associated with a substantial yield loss of up to 50%as well as a reduction in nitrogen use efficiency(NUE).In this study,we discovered that the target of rapamycin(TOR)signaling pathway is compromised in rice under *** profiling-coupled transcriptome sequencing(polysome-seq)analysis unveiled a substantial reduction in global translation in response to WST associated with the downregulation of TOR ***,biochemical,and genetic analyses revealed new insights into the impact of the positive TOR-S6K-RPS6 and negative TOR-MAF1 modules on translation repression under ***,ammonium exhibited a greater ability to alleviate growth constraints under WsT by enhancing TOR signaling,which simultaneously promoted uptake and utilization of ammonium and nitrogen *** further demonstrated that TOR modulates the ammonium transporter AMT1;1 as well as the amino acid permease APP1 and dipeptide transporter NPF7.3 at the translational level through the 5'untranslated ***,these findings reveal that enhancing TOR signaling could mitigate rice yield penalty due to WST by regulating the processes involved in protein synthesis and *** study will contribute to the breeding of new rice varieties with increased water and fertilizer utilization efficiency.

关键词： target of rapamycin TOR water-saving rice low-carbon agriculture drought nitrogen use efficiency NUE

Effects of biochar produced from distiller grains on agronomic performances of sorghum(Sorghum bicolor L.) and greenhouse gas emissions from soil

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Pedosphere 2024年第5期34卷 951-959页

作者： Hongjun YANG Suyi zhang Jingyu HU Jianguo HUANG Zonghua AO Xiaoqin WANG Zhe LI Xuepin LIAO College of Resources and Environment Southwest University National Engineering Research Center of Solid-State Brewing Luzhou Laojiao Co.Ltd. College of Biomass Science and Engineering Sichuan University

Aromatic liquor breweries produce massive distiller grains containing a high percentage of rice husks that necessitate harmless treatment and resource utilization. These husk-rich distiller grains can be pyrolyzed in the Ni-based catalyst system at a relatively low temperature（480?C） into combustible gas,which is used in liquor distillation, and biochar（BDG） with high mineral nutrients and good surface properties. A 3-year field experiment（2018–2020） was established to understand the effects of BDG on sorghum agronomic performances and greenhouse gas emissions from the soil. The results showed that BDG had higher mineral nutrient（N, P, K, and S） contents, larger cation exchange capacity, and better surface structure than those prepared using the traditional method at 400 and 600?C. Compared with sole chemical fertilizer（CF）, the combination of CF and BDG（CF+BDG） increased sorghum nutrient（N, P, and K） uptake, yield, fertilizer use efficiency, and economic benefit. Cumulative CO2emission from the soil changed little between with and without BDG,indicating the microbial stability of BDG. The effective adsorption of NH3or NH4+by BDG upon N application may reduce N loss through NH3and N2O emissions and increase the efficiency of fertilizer N use. Cumulative ch4emission ranged from 32.45 to 44.86 g ha-1, which could be overlooked as a greenhouse gas in the sorghum field. Moreover, CF+BDG significantly decreased NH3and N2O emissions for the production of each unit of sorghum grains and the CO2emission from the land for the production of a certain amount of sorghum grains. Therefore, CF+BDG exhibited better agronomic and environmental performances in sorghum cultivation.

关键词： CO2 emission economic benefit environmental performance fertilizer use efficiency N2O emission NH3 emission nutrient uptake yield

Finite Temperature Magnetism in the Triangular Lattice Antiferromagnet KErTe_(2)

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chinese Physics Letters 2024年第9期41卷 140-150页

作者： Weiwei Liu Zheng zhang Dayu Yan Jianshu Li Zhitao zhang Jianting Ji Feng Jin Youguo Shi Qingming zhang Department of Physics Renmin University of ChinaBeijing 100872China Beijing National Laboratory for Condensed Matter Physics and Institute of PhysicsChinese Academy of SciencesBeijing 100190China Anhui Province Key Laboratory of Condensed Matter Physics at Extreme Conditions High Magnetic Field LaboratoryChinese Academy of SciencesHefei 230031China School of Physical Science and Technology Lanzhou UniversityLanzhou 730000China

After the discovery of the AREch2(A=alkali or monovalent ions,RE=rare-earth,ch=chalcogen)triangular lattice quantum spin liquid(QSL)family,a series of its oxide,sulfide,and selenide counterparts has been consistently reported and extensively *** KErTe_(2) represents the initial synthesized telluride member,preserving its triangular spin lattice,it was anticipated that the substantial tellurium ions could impart more pronounced magnetic attributes and electronic structures to this material *** study delves into the magnetism of KErTe_(2) at finite temperatures through magnetization and electron spin resonance(ESR)*** on the angular momentum J after spin-orbit coupling(SOC)and symmetry analysis,we obtain the magnetic effective Hamiltonian to describe the magnetism of Er^(3+)in R3m space *** the mean-field approximation to the Hamiltonian,we can simulate the magnetization and magnetic heat capacity of KErTe_(2) in paramagnetic state and determine the crystalline electric field(CEF)parameters and partial exchange *** relatively narrow energy gaps between the CEF ground state and excited states exert a significant influence on the *** example,small CEF excitations can result in a significant broadening of the ESR linewidth at 2 *** the fitted exchange interactions,although the values are small,given a large angular momentum J=15/2 after SOC,they still have a noticeable effect at finite ***,the heat capacity data under different magnetic fields along the𝑐axis direction also roughly match our calculated results,further validating the reliability of our analytical *** derived parameters serve as crucial tools for future investigations into the ground state magnetism of KErTe_(2).The findings presented herein lay a foundation for exploration of the intricate magnetism within the triangular-lattice delafossite family.

关键词： triangular Hamiltonian magnetization

Zeolite-based materials for greenhouse gas capture and conversion

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Science china chemistry 2024年

作者： Qiang zhang Jialiang Li Li Li Jihong Yu State Key Laboratory of Inorganic Synthesis and Preparative chemistry College of Chemistry Jilin University International Center of Future Science Jilin University

The global warming caused by greenhouse gas emissions, principally carbon dioxide （CO2） and methane （ch4）, has become a great threat to human survival. The capture and conversion of CO2and ch4not only provide an effective method to reduce the greenhouse gas emissions towards achieving carbon neutrality but also produce sustainable chemicals and fuels to meet the increasing demand for chemicals and energy. Zeolite-based materials are excellent adsorbents and catalysts for CO2and ch4capture and conversion. In this mini-review, we present the recent progress in zeolite-based materials for CO2and ch4capture and conversion. We first discuss the key factors of zeolites on the CO2and ch4adsorption performance. Then, we demonstrate the catalytic conversion of CO2and ch4into value-added chemicals, including hydrocarbons, oxygenates, and syngas. Finally,we provide an outlook regarding the opportunities and challenges for the capture and conversion of CO2and ch4towards achieving carbon neutrality and sustainable development.

关键词：

SCCO_(2)作用下不同含水性煤孔裂隙结构变化机制

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煤炭学报 2024年第7期49卷 3143-3153页

作者：张小东靳沙沙张瑜张硕韩磊河南理工大学能源科学与工程学院河南焦作454000 河南省资源环境调查一院河南郑州450000

深部煤层封存CO_(2)增产ch_(4)产出过程中,处于超临界状态的CO_(2)(SCCO_(2))与煤中矿物质发生反应,改变煤的孔隙性,进而影响煤层封存CO_(2)的效果和甲烷增产效果。为发现SCCO_(2)–H_(2)O–煤岩作用对煤中孔隙的影响特征,以焦煤为研究... 详细信息

深部煤层封存CO_(2)增产ch_(4)产出过程中,处于超临界状态的CO_(2)(SCCO_(2))与煤中矿物质发生反应,改变煤的孔隙性,进而影响煤层封存CO_(2)的效果和甲烷增产效果。为发现SCCO_(2)–H_(2)O–煤岩作用对煤中孔隙的影响特征,以焦煤为研究对象,开展了不同含水条件下的超临界CO_(2)改造煤实验,基于矿物组成和孔隙性测定结果,对比煤中主要矿物质和不同尺度的孔裂隙变化的差异,探讨了不同含水状态下SCCO_(2)流体对孔裂隙性的作用机制。研究表明:①SCCO_(2)作用后,煤体表面粗糙、疏松,且由于矿物溶蚀使得一些裂隙得到贯通,微裂隙连通性增强。②SCCO_(2)流体对煤具有“扩孔”作用,表现为微、小孔含量下降,中、大孔占比升高,也即微、小孔隙向大孔隙的转化,且孔隙连通性改善;进一步发现,萃余煤吸附孔的分形维数稍微增加,粗糙度增大,而渗流孔的分形维数显著降低,复杂性和非均质性降低。③SCCO_(2)对煤中碳酸盐类矿物的溶解性最好,其次是黏土矿物,且随着含水率增加,萃余煤中的碳酸盐矿物占比先增加后减小。SCCO_(2)使干燥基态、饱和水态煤样中碳酸盐矿物显著溶解,有效改善了孔隙结构,且对饱和水态煤样作用效果更好。空气干燥基态煤样经SCCO_(2)作用后,新生成的白云石矿物聚集在孔喉中造成堵孔效应,缩小原有大孔隙尺寸,是引起不同含水性煤孔隙差异性变化的主要原因。

关键词：焦煤孔裂隙结构含水性超临界状态的CO_(2) CO_(2)封存

Yuzaoea gen. nov., a new biraphid diatom(Bacillariophyceae)genus and its phylogenetic significance

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Acta Oceanologica Sinica 2024年第2期43卷 130-136页

作者： Honghan Liu chenhong Li Lang Li Xuesong Li Lin Sun Junrong Liang Jun zhang Yahui Gao changping chen Key Laboratory of Ministry of Education for Coastal and Wetland Ecosystems and School of Life Sciences Xiamen UniversityXiamen 361102China State Key Laboratory of Marine Environmental Science Xiamen UniversityXiamen 361102China Guangxi Key Laboratory of Marine Environmental Science Guangxi Academy of Marine SciencesGuangxi Academy of SciencesNanning 530007China Beibu Gulf Marine Industry Research Institute Fangchenggang 538000China

The flexed frustules in pennate diatoms are usually associated with monoraphid diatoms. Interestingly, we found a biraphid diatom species with flexed frustules in an offshore intertidal beach environment on Weizhou Island,Beihai City, Guangxi Zhuang Autonomous Region, china. Therefore, based on morphological characteristics, we described a new genus of diatoms Yuzaoea sinensis gen. et sp. nov. ch Li, HH Liu, YH Gao & CP chen. The frustule of this genus is characterized by heterogeneous frustule with one concave valve and one convex valve,complete raphe on both valves, straight and moderately eccentric raphe, uniseriate striae and girdle bands with a single row of areolae. The most identifying feature of this genus was the flexed frustule, which is rare in biraphid diatoms and common in monoraphid diatoms. We compared the morphometric characteristics of genus Yuzaoea with genus Rhoikoneis and several genera within the family Rhoicospheniaceae, including Rhoicosphenia,Campylopyxis, and Cuneolus. Phylogenetic analyses based on SSU rRNA and rbc L showed that the genus Yuzaoea was the sister group to the clade of Rhoicosphenia with a high support value(bootstrap values = 100%), and the clade “Yuzaoea+Rhoicosphenia” was sister to the clade of monoraphid diatoms, in which the genera Achnanthidium, Planothidium and some Cocconeis with high support values(bootstrap = 100%).Morphologically, the genus Yuzaoea shares many morphological features with monoraphid diatoms like genera Achnanthidium and Planothidium and the members within the Rhoicospheniaceae. Therefore, based on a combined morphological studies and phylogenetic results we suggested that this branch may represented the evolution of one kind monoraphid diatoms, from biraphid diatoms(e.g. genus Yuzaoea), to incompleted biraphid diatoms(e.g. genera Rhoicosphenia, Campylopyxis), to monoraphid diatoms(e.g. genera Achnanthidium and Planothidium).

关键词： biraphid diatom marine new genus Rhoicospheniaceae taxonomy Yuzaoea

Removal of kathon by UV-C activated hydrogen peroxide:Kinetics,mechanisms,and enhanced biodegradability assessment

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chinese Journal of chemical Engineering 2024年第1期65卷 178-187页

作者： Jinzhi Cui Guiqiao Wang Xing Rong Wensu Gao Yaxin Lu Yawen Luo Lichao zhang Zhongfa cheng Canzhu Gao School of Environmental Science and Engineering Shandong UniversityQingdao 266237China Shandong Taihe Technologies Co. Ltd.Zaozhuang 250031China

Kathon(CMI-MI),a mixture of 5-chloro-2-methyl-4-isothiazolin-3-one(CMI)and 2-methyl-4-isothiazolin-3-one(MI),was extensively used in industry as a nonoxidizing biocide or ***,it would show adverse effects on aquatic life when it is discharged into surface *** this study,the removal performance,parameter influence,degradation products and enhancement of subsequent biodegradation of CMI-MI in UV/H_(2)O_(2)system were systematically *** degradation rate of CMI-MI could reach 90%under UV irradiation for 20 min when the dosage of H_(2)O_(2)was 0.3 mmol·L^(–1).The DOC(dissolved organic carbon)mineralization rate of CMI-MI could reach 35%under certain conditions([H_(2)O_(2)]=0.3 mmol·L^(–1),UV irradiation for 40 min).kobs was inversely proportional to the concentration of CMI-MI and proportional to the concentration of H_(2)O_(2).The degradation rate of CMIMI was almost unchanged in the pH range from 4 to *** the presence of CO_(3)^(2-)inhibited the removal rate of CMI-MI,SO_(4)^(2-),Cl^(-),NO_(3)^(-),and NH_(4)^(+) did not interfere with the degradation of CMI-MI in the *** was found that UV/H_(2)O_(2)system had lower energy consumption and more economic advantage compared with UV/PS system by comparing the EEO(electric energy per order)values under the same *** main organic products were identified,namely HCOOH and ch_(3)NH_(2).There’s also the formation of Cl^(-)and SO_(4)^(2-).After UV and UV/H_(2)O_(2)photolysis,the biochemical properties of CMI-MI solution were obviously improved,especially the UV/H_(2)O_(2)treatment effect was better,indicating that UV/H_(2)O_(2)technology is expected to combine with biotechnology to remove CMI-MI effectively and environmentally friendly from wastewater.

关键词： Kathon UV/H_(2)O_(2) Biological degradation Circulating cooling water