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Enhancement of the Co_(2)adsorption and hydrogenation to CH_(4)capacity of ru–Na–ca/γ–Al_(2)o_(3)dual function material by controlling the ru calcination atmosphere

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journal of Environmental Sciences 2024年第6期140卷 292-305页

作者： Alejandro Bermejo-López Beñat Pereda-Ayo jon A.onrubia-calvo joséA.González-Marcos Juan r.González-Velasco Department of Chemical Engineering Faculty of Science and TechnologyUniversidad del País Vasco UPV/EHUBarrio Sarrienas/n48940 LeioaBizkaiaSpain

Integrated Co_(2)capture and utilization(ICCU)technology requires dual functional materials(DFMs)to carry out the process in a single reaction *** influence of the calcination atmosphere on efficiency of 4%ru-8%Na_(2)Co_(3)-8%cao/γ-Al_(2)o_(3)DFM is *** adsorbent precursors are first co-impregnated onto alumina and calcined in ***,ru precursor is impregnated and four aliquotes are subjected to different calcination protocols:static air in muffle or under different mixtures(10%H_(2)/N_(2),50%H_(2)/N_(2)and N_(2))*** are characterized by XrD,N_(2)adsorption-desorption,H_(2)chemisorption,TEM,XPS,H_(2)-TPD,H_(2)-TPr,Co_(2)-TPD and *** catalytic behavior is evaluated,in cycles of Co_(2)adsorption and hydrogenation to CH_(4),and temporal evolution of reactants and products concentrations is *** calcination atmosphere influences the physicochemical properties and,ultimately,activity of *** data and catalytic performance discover the acccomodation of ru nanoparticles disposition and basic sites is mostly influencing the catalytic *** calcined under N_(2)flow(ruNaca-N_(2))shows the highest CH_(4)production(449μmol/g at 370℃),because a well-controlled decomposition of precursors which favors the better accomodation of adsorbent and ru phases,maximizing the specific surface area,the ru-basic sites interface and the participation of different basic sites in the Co_(2)methanation ***,the calcination in a N_(2)flow is revealed as the optimal calcination protocol to achieve highly efficient DFM for integrated Co_(2)adsorption and hydrogenation applications.

关键词： Co_(2)methanation Integrated Co_(2)capture and utilization(ICCU) Dual functional material(DFM) ru calcination atmosphere

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Al-ca-Fe合金中Al_(10)caFe_(2)化合物的形成与表征

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Transactions of Nonferrous Metals Society of China 2024年第2期34卷 361-377页

作者： N.A.BELoV T.K.AKoPYAN E.A.NAUMoVA V.V.DoroSHENKo T.A.SVIrIDoVA N.o.KoroTKoVA National University of Science and Technology MISIS 4 Leninsky pr.Moscow 119049Russia Baikov Institute of Metallurgy and Materials Science 49 Leninsky pr.Moscow 119991Russia

采用热力学计算和实验技术研究铝角的Al-ca-Fe体系相图,包括液相面投影图和凝固反应。结果表明,与铝固溶体(Al)平衡的不是Al_(3)Fe相,而是一种组成符合化学式Al_(10)caFe_(2)的三元化合物。通过包晶转变L+Al_(3)Fe→(Al)+Al_(10)caFe_(2... 详细信息

采用热力学计算和实验技术研究铝角的Al-ca-Fe体系相图,包括液相面投影图和凝固反应。结果表明,与铝固溶体(Al)平衡的不是Al_(3)Fe相,而是一种组成符合化学式Al_(10)caFe_(2)的三元化合物。通过包晶转变L+Al_(3)Fe→(Al)+Al_(10)caFe_(2)(638℃,3.3%ca和0.5%Fe,摩尔分数)发生从二元化合物到三元化合物的转变。与针状Al_(3)Fe相夹杂物不同,三元化合物的初晶和共晶具有致密的形貌。使用第一性原理计算和X射线衍射分析确定三元化合物Al_(10)caFe_(2)的晶格结构。此外,近共晶合金Al-6%ca-1%Fe(质量分数)在500~600℃退火后具有细晶组织,过量相的总体积分数约为25%。因此,Al-ca-Fe体系可用于制造新的铝基复合合金。

关键词： Al-ca合金金属间化合物相图相变显微组织铝基复合材料

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Basis for the diversity and extent in loss of digestible nutrients created by dietary phytin: Emphasis on fowl and swine

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动物营养学报 2024年第1期16卷 422-428页

作者： Edwin T. Moran Michael r. Bedford Poultry Science Department Auburn University AL 36830-5416 USA AB Vista Woodstock Court Blenheim Road Marlborough Wiltshire SN8 4AN UK

Phytin is the ca 2+ -Mg 2+ -K + salt of phytic acid that is created and deposited in the aleurone layer and/or germ of grains and legumes. Its high presence in feedstuffs for fowl and swine diets results in it being a universal and significant impediment to optimum performance. Phytin impairs gastrointestinal recovery of a wide array of nutrients, the effect varying with the nutrient concerned. on exposure to low pH during gastric digestion, phytin dissociates into phytic acid and solubilized ca 2+ . Even at low gastric pH, phytic acid is negatively charged which forms the basis of its anti-nutritive behavior. Pepsinogen has extensive basic amino acids on its activation peptide that are presented as cations at low pH which are targeted by pepsin for activation. Partially crystalized ca 2+ near the enzyme's active site further stabilizes its newly formed structure. Thus, phytic acid appears to interfere with gastric digestion by several mechanisms; interfering with pepsinogen activation by binding to the polypeptide's basic amino acids; coordinating free ca 2+ , destabilizing pepsin; binding some dietary proteins directly, further compromising gastric proteolysis. Upon digesta attaining neutrality in the duodenum, ca 2+ and other cations re-bind with accessible anions, phytic acid being a significant contender. Phytate not only binds free cations but can also strip them from enzymes (e.g. ca 2+ , Zn 2+ ) which reduces their structural resistance to autolysis and ability as co-factors (e.g. Zn 2+ ) to increase enzyme activity. Goblet cells initially employ ca 2+ as an electronic shield between mucin layers enabling granule formation and cell storage. After mucin granule release, ca 2+ is progressively displaced by Na + to free the viscous mucins enabling its translocation. Mucin entangles with the glycocalyx of adjacent enterocytes thereby constructing the unstirred water layer (USWL). Excessive removal of ca 2+ from mucin by phytic acid increases its fluidity facilit

关键词： Digestive enzyme calcium Endogenous protein Mucin Phytin

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Efficient and reversible separation of NH_(3) by deep eutectic solvents with multiple active sites and low viscosities

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Chinese journal of Chemical Engineering 2024年第3期67卷 97-105页

作者： Jiayin Zhang Lu Zheng Siqi Fang Hongwei Zhang Zhenping cai Kuan Huang Lilong Jiang National Engineering research Center of Chemical Fertilizer catalyst(NErC-CFC) College of Chemical EngineeringFuzhou UniversityFuzhou 350002China Qingyuan Innovation Laboratory Quanzhou 362801China

The efficient separation and collection of ammonia(NH_(3))during NH_(3) synthesis process is essential to improve the economic efficiency and protect the *** this work,ethanolammonium hydrochloride(EtoHACl)and phenol(PhoH)were used to prepare a novel class of deep eutectic solvents(DESs)with multiple active sites and low *** NH_(3) separation performance of EtoHACl+PhoH DESs was analyzed *** is figured out that the NH_(3) absorption rates in EtoHACl+PhoH DESs are very *** NH_(3) absorption capacities are very high and reach up to 5.52 and 10.74 mol·kg1 at 11.2 and 100.4 kPa under 298.2 K,*** addition,the EtoHACl+PhoH DESs present highly selective absorption of NH_(3) over N_(2) and H_(2) and good regenerative properties after seven cycles of absorption/*** intrinsic separation mechanism of NH_(3) by EtoHACl+PhoH DESs was further revealed by spectroscopic analysis and quantum chemistry calculations.

关键词： Separation Absorption Ionic liquid Deep eutectic solvent Multiple active site Low viscosity

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Increases in the incremental exercise mean response time across the steady state domain:Implications for exercise testing&prescription

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Sports Medicine and Health Science 2024年第4期6卷 315-323页

作者： Bridgette G.J.o'Malley robert A.robergs Todd A.Astorino Queensland University of Technology Faculty of Health:School of Exercise and Nutrition SciencesBrisbaneAustralia Department of Kinesiology CSU-San MarcosSan MarcosCAUSA

We hypothesized that slowed oxygen uptake(Vo_(2))kinetics for exercise transitions to higher power outputs(Po)within the steady state(SS)domain would increase the mean response time(MrT)with increasing exercise intensity during incremental *** highly trained cyclists(mean±standard deviation[SD]);age(39±6)years[yr];and Vo_(2) peak=(61±9)mL/kg/min performed a maximal,ramp incremental cycling test and on separate days,four 6-min bouts of cycling at 30%,45%,65%&75% of their incremental peak Po(Wpeak).SS trial data were used to calculate the MrT and verified by mono-exponential and linear curve *** the ramp protocol attained the value from SS,the Po,in Watts(W),was converted to time(min)based on the ramp function W to quantify the incremental MrT(iMrT).Slope analyses for the Vo_(2) responses of the SS versus incremental exercise data below the gas exchange threshold(GET)revealed a significant difference(p=0.003;[0.437±0.08]vs.[0.382±0.05]L·min^(-1)).There was a significant difference between the 45%Wpeak steady state Vo_(2)(ss Vo_(2))([3.08±0.30]L·min^(-1),respectively),and 30% Wpeak ss Vo_(2)(2.26±0.24)(prT for 45% and 30% Wpeak ss Vo_(2) values([50.58±36.85]s vs.[32.20±43.28]s).These data indicate there is no single iMrT,which is consistent with slowed Vo_(2) kinetics and an increasing Vo_(2) deficit for higher exercise intensities within the SS domain.

关键词： Mean responsetime(MrT) Incremental exercise Steady state(SS) Exercise testing Exercise prescription

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Navigating the Challenges of Emerging Contaminants to Protect Human and Ecological Health

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Engineering 2024年第6期37卷 1-2页

作者： Jiuhui Qu Michael r.Hoffmann Gang Yu School of Environment Tsinghua UniversityBeijing 100084China Linde-robinson Laboratories California Institute of TechnologyPasadenaCA 91125USA Advanced Interdisciplinary Institute of Environmental and Ecology Beijing Normal UniversityZhuhai 519000China

Emerging contaminants are defined as chemicals that are not currently(or have only recently been)regulated and about which there are concerns regarding their impact on human or ecological *** contaminants are widely detected in air,water,soil,sediment,and biotic *** is against this backdrop of urgency that we have curated this special issue titled“Emerging Contaminants Control:Science and Technology,”with the goal of uniting the latest scientific insights and pioneering strategies to address this global *** special issue embarks on a comprehensive examination of the emerging contaminants dilemma,covering aspects such as risk assessment,remediation technologies,environmental surveying,and the broader implications for *** a collection of articles,we probe deep into the core of this issue,showcasing studies that range from appraising environmental risks to forging new methods for treatment and scrutinizing the occurrence of contaminants across different environmental settings.

关键词： Ecological surveying environmental

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Prompt neutron emission in ^(250)No spontaneous fission associated with ground and isomeric state decays

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Chinese Physics C 2024年第6期48卷 112-117页

作者： r.S.Mukhin A.V.Isaev A.V.Andreev M.L.Chelnokov V.I.Chepigin H.M.Devaraja I.N.Izosimov A.A.Kuznetsova o.N.Malyshev A.G.Popeko Yu.A.Popov A.rahmatinejad B.Sailaubekov T.M.Shneidman E.A.Sokol A.I.Svirikhin M.S.Tezekbayeva M.A.Bychkov A.V.Yeremin o.Dorvaux B.Gall K.Kessaci K.Hauschild A.Lopez-Martens joint Institute for Nuclear research Dubna141980Russia Dubna State University Dubna141982Russia Institute of Nuclear Physics Almaty050032Kazakhstan L.N.Gumilyov Eurasian National University Astana010008Kazakhstan Kazan Federal University Kazan420008Russia Universitéde Strasbourg CNRSStrasbourg67000France IJCLab IN2P3-CNRSUniversitéParis-SaclayOrsay91400France

The complete-fusion reaction^(204)Pb(^(48)ca,2n)^(250)No was used to study two activities of^(250)No with distinct half-lives.A total of 1357 events were observed in the SFiNx neutron detection *** average number of neutrons emitted per spontaneous fission of^(250)No was determined to be(4.1±0.1).The unusually symmetrical shape of the prompt neutron multiplicity distribution was restored and presented for the first *** tests were performed to compare the prompt neutron multiplicity distributions associated with the ground state and K-isomer state decays.

关键词： spontaneous fission prompt neutrons actinide

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Application of novel constrained friction processing method to produce fine grained biomedical Mg-Zn-ca alloy

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journal of Magnesium and Alloys 2024年第2期12卷 516-529页

作者： Ting Chen Banglong Fu Junjun Shen Uceu F.H.r.Suhuddin Björn Wiese Yuanding Huang Min Wang jorge F.dos Santos Jean Pierre Bergmann Benjamin Klusemann Solid State Materials Processing Institute of Material MechanicsHelmholtz-Zentrum HereonMax-Planck-Str.1Geesthacht 21502Germany Functional Magnesium Materials Institute of Metallic BiomaterialsHelmholtz-Zentrum HereonMax-Planck-Str.1Geesthacht 21502Germany Shanghai Key Laboratory of Materials Laser Processing and Modification Shanghai Jiao Tong UniversityDongchuan Road 800Shanghai 200240China Applied Materials and Manufacturing Energy and Environment DivisionPacific Northwest National LaboratoryPO Box 999RichlandWA 99352USA Production Technology Group Technisiche Universität IlmenauGustav-Kirchhoff-Platz 2Ilmenau 98693Germany Institute for Production Technology and Systems Leuphana University of LüneburgUniversitätsallee 1Lüneburg 21335Germany

In order to obtain Mg alloys with fine microstructures and high mechanical performances,a novel friction-based processing method,name as“constrained friction processing(CFP)”,was *** CFP,defect-free Mg-Zn-ca rods with greatly refined grains and high mechanical properties were *** to the previous as-cast microstructure,the grain size was reduced from more than 1 mm to around 4μm within 3 s by a single process *** compressive yield strength was increased by 350%while the ultimate compressive strength by 53%.According to the established material flow behaviors by“tracer material”,the plastic material was transported by shear *** the base material to the rod,the material experienced three stages,*** by the tool,upward flow with additional tilt,followed by upward *** microstructural evolution was revealed by“stop-action”*** microstructural development at regions adjacent to the rod is mainly controlled by twinning,dynamic recrystallization(DrX)as well as particle stimulated nucleation,while that within the rod is related to DrX combined with grain growth.

关键词： Constrained friction processing Magnesium alloys Microstructure Mechanical properties Grain refinement Plastic deformation

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Surgeon preferences in the treatment of thumb carpometacarpal osteoarthritis

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World journal of orthopedics 2024年第5期15卷 435-443页

作者： Edward J Wu Bradley W Fossum Wyatt Vander Voort Christopher o Bayne robert M Szabo Department of orthopedic Surgery University of Minnesota Medical SchoolMinneapolisMN 55455United States Department of orthopaedic Surgery UC Davis School of MedicineSacramentoCA 95817United States

BACKGroUND Primary thumb carpometacarpal(CMC)osteoarthritis is one of the most common conditions encountered by hand *** the vast number of operations that have been proposed,none have demonstrated results significantly superior to trapeziectomy *** The purpose of our study was to determine why surgeons opt for their technique in treating CMC *** A cross-sectional survey of active members of the American Society for Surgery of the Hand was conducted to evaluate the reasons behind their preferred technique in the treatment of isolated thumb CMC *** were contacted by email once and provided with a link to a de-identified survey consisting of 5 treatment questions and 5 demographic *** of 950 responses were received.40.5%of surgeons preferred trapeziectomy+ligament reconstruction tendon interposition(LrTI),followed by trapeziectomy+suspensionplasty(28.2%),suture button suspension(5.9%),trapeziectomy alone(4.6%),prosthetic arthroplasty(3.2%),arthrodesis(1.1%),and other(6.6%).Proponents of trapeziectomy+LrTI cited familiarity(73.2%),exposure during fellowship(48.8%)and less proximal migration(60%)to be the main reasons affecting their *** who preferred trapeziectomy+suspensionplasty most reported simplicity(74.9%),fewer complications(45.3%),less proximal migration(43.8%),and avoidance of autogenous tissue harvest(42.7%).Advocates of suture button suspension cited avoidance of autogenous tissue harvest(80.4%),shorter immobilization(76.8%),and quicker recovery(73.2%)with their *** of trapeziectomy alone cited simplicity(97.7%),fewer complications(86.4%),and avoidance of autogenous tissue harvest(59.1%).In their comments,45%of surgeons choosing trapeziectomy alone cited evidence as an additional *** of prosthetic arthroplasty cited improved pinch strength(83.3%)and improved range of motion(63.3%),while those preferring arthrodesis cited better pinch strength(90%)and freque

关键词： Thumb carpometacarpal osteoarthritis Trapeziectomy Ligament reconstruction tendon interposition Suspensionplasty Preferences Trends

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overexpression of tonoplast ca^(2+)-ATPase in guard cells synergistically enhances stomatal opening and drought tolerance

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journal of Integrative Plant Biology 2024年第8期66卷 1587-1602页

作者： Jinghan Su Bingqing He Peiyuan Li Baiyang Yu Qiwen Cen Lingfeng Xia Yi Jing Feibo Wu rucha Karnik Dawei Xue Michael r.Blatt Yizhou Wang Institute of Crop Science Zhejiang UniversityHangzhou 310058China Laboratory of Plant Physiology and Biophysics University of GlasgowGlasgow G128QQUK BGI research Sanya 572025China College of Life and Environmental Sciences Hangzhou Normal UniversityHangzhou 311121China Zhejiang Provincial Key Laboratory of Crop Germplasm Zhejiang UniversityHangzhou 310058China

Stomata play a crucial role in plants by controlling water status and responding to drought ***,simultaneously improving stomatal opening and drought tolerance has proven to be a significant *** address this issue,we employed the onGuard quantitative model,which accurately represents the mechanics and coordination of ion transporters in guard *** the guidance of onGuard,we successfully engineered plants that overexpressed the main tonoplast ca^(2+)-ATPase gene,Aca11,which promotes stomatal opening and enhances plant ***,these transgenic plants also exhibited improved drought tolerance due to reduced water loss through their ***,onGuard assisted us in understanding the mechanism behind the unexpected stomatal behaviors observed in the Aca11 overexpressing *** study revealed that the overexpression of Aca11 facilitated the accumulation of ca^(2+)in the vacuole,thereby influencing ca^(2+)storage and leading to an enhanced ca^(2+)elevation in response to abscisic *** regulatory cascade finely tunes stomatal responses,ultimately leading to enhanced drought *** findings underscore the importance of tonoplast ca^(2+)-ATPase in manipulating stomatal behavior and improving drought ***,these results highlight the diverse functions of tonoplast-localized Aca11 in response to different conditions,emphasizing its potential for future applications in plant enhancement.

关键词： Aca11 drought guard cells modeling stomata

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