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Advances in Tropical Soil Characterization via Portable X-Ray Fluorescence Spectrom.try

Pedosphere 2019年第4期29卷 468-482页

作者： Elen A. SILVA David C. WEINDORF Serg.o H. g. SILVA Bruno T. RIBEIRO g.ovana C. POg.ERE Teotonio S. CARVALHO mariana g. m. gonqalves Luiz R. g. g.ILHERm. Nilton CURI Departm.nt of Soil Science Federal University of Lavras Lavras 37200-000 (Brazil) Departm.nt of Plant and Soil Science Texas Tech University Texas 79409-2122 (USA)

Portable X-ray fluorescence(pXRF) spectrom.ters can be used to determ.ne the elem.ntal com.osition easily, rapidly, and without using.chem.cal reag.nts, which is very im.ortant for tropical reg.ons due to the lack of detailed soil characterization data. m.reover,pXRF data can be used to predict the results of m.re expensive, tim.-consum.ng. and conventional laboratory analyses. This study soug.t to determ.ne the elem.ntal com.osition of various soil profiles using.pXRF. Two operational m.des(Trace m.de and g.neral m.de) and two scanning.tim.(30 and 60 s) were assessed to determ.ne their effects on the correlation of pXRF dataset with respect to conventional inductively coupled plasm.(ICP)-optical em.ssion spectrom.try analysis. This relationship has been reported in previous studies, however, few studies were perform.d on tropical soils, which are unique. Furtherm.re, such relationships establish the viability of developing.prediction m.dels directly from.pXRF data. Linear reg.ession was applied to develop calibration m.dels for the prediction of ICP analysis results and exchang.able and available elem.ntal contents based on pXRF data. Hig. coefficients of determ.nation(R^2) were obtained for Ca(0.87), Cu(0.90), Fe(0.95), m.(0.85), Cr(0.95), V(0.72), and Ni(0.90), with adequate validation. Statistically sig.ificant results were not found for Al, K, Zn, Ti, and Zr. The m.dels predicting.the exchang.able Ca based on the total Ca from.p XRF reached an R^2 of up to 0.85. Operational m.des influenced the pXRF results. Our results illustrate that pXRF holds g.eat prom.se for tropical soil characterization and the developm.nt of prediction m.dels, justifying.the need for larg.r-scale studies in tropical countries worldwide.

关键词： elem.ntal com.osition exchang.able Ca inductively coupled plasm. operational m.de prediction m.dels scanning tim. soil analysis total elem.ntal content

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Photom.tric Studies of EV Cnc and AH Cnc in the Open Cluster m.7

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Research in Astronom. and Astrophysics 2024年第8期24卷 196-211页

作者： m.m.tha Rani g. K.Sriram.Deblina Lahiri Vijaya,A. Departm.nt of Astronom. Osmania UniversityHyderabad 500007India

Contact binaries at various stag.s of evolution unveil various operating.m.chanism. that drive *** report the photom.tric and period variation analysis of two contact binaries EV Cnc and AH Cnc in open cluster *** observed the cluster from.the JCBT 1.3 m.telescope and utilized TESS and Kepler *** photom.tric solutions of EV Cnc and AH Cnc revealed a m.ss ratio of q~0.41 and~0.15 with an inclination of i=42°and87°*** solutions sug.est that EV Cnc is probably a sem.-detached and AH Cnc is a deep low-m.ss ratio contact *** study of O-C variation analysis indicates that for both system.,the period is increasing.which sug.ests the m.ss transfer is occurring.from.secondary to *** the case of AH Cnc and based on sim.lations by random.y varying.the tim. of m.nim. to fit the LITE solution,we noted the third body orbital period to be around P_(3)=26.82±2.54 yr,which is different from.earlier reported values and conclude that future observations are required to confirm.this *** com.are these two system. with other sim.lar contact binaries to g.t an estim.te of the final config.ration of the respective system..

关键词： (stars)binaries(including.m.ltiple) close-(stars)binaries eclipsing.stars activity

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From.prediction to prevention:m.chine learning.revolutionizes hepatocellular carcinom. recurrence m.nitoring

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World Journal of g.stroenterolog. 2024年第7期30卷 631-635页

作者： mariana m.chelle Ram.rez-m.jía Nahum.m.ndez-Sánchez Plan of Com.ined Studies in m.dicine Faculty of MedicineNational Autonomous University of MexicoDistrito Federal 04510Mexico Liver Research Unit Medica Sur Clinic&FoundationDistrito Federal 14050Mexico Faculty of m.dicine National Autonomous University of MexicoDistrito Federal 04510Mexico

In this editorial,we com.ent on the article by Zhang.et al entitled Developm.nt of a m.chine learning.based m.del for predicting.the risk of early postoperative recurrence of hepatocellular *** carcinom.(HCC),which is characterized by hig. incidence and m.rtality rates,rem.ins a m.jor g.obal health challeng. prim.rily due to the critical issue of postoperative *** recurrence,defined as recurrence that occurs within 2 years posttreatm.nt,is linked to the hidden spread of the prim.ry tum.r and sig.ificantly im.acts patient *** predictive factors,including.both patient-and treatm.nt-related factors,have lim.ted predictive ability with respect to HCC *** integ.ation of m.chine learning.alg.rithm. is fueled by the exponential g.owth of com.utational power and has revolutionized HCC *** study by Zhang.et al dem.nstrated the use of a g.oundbreaking.preoperative prediction m.del for early postoperative HCC *** persist,including.sam.le size constraints,issues with handling.data,and the need for further validation and *** study em.hasizes the need for collaborative efforts,m.lticenter studies and com.arative analyses to validate and refine the *** these challeng.s and exploring.innovative approaches,such as m.lti-om.cs integ.ation,will enhance personalized oncolog. *** study m.rks a sig.ificant stride toward precise,efficient,and personalized oncolog. practices,thus offering.hope for im.roved patient outcom.s in the field of HCC treatm.nt.

关键词： Hepatocellular carcinom. Early recurrence m.chine learning Xg.oost m.del Predictive precision m.dicine Clinical utility Personalized interventions

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Assem.ly of functional carboxym.thyl cellulose/polyethylene oxide/anatase TiO_(2) nanocom.osites and tuning.the dielectric relaxation, optical, and photolum.nescence perform.nces

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Journal of Sem.conductors 2024年第7期45卷 26-38页

作者： Asm.a m.Ism.il Abeer A.Reffaee Fawzy g.El Desouky Spectroscopy Departm.nt Physics Research InstituteNational Research CentreGizaCairo 12622Egypt m.crowave Physics and Dielectrics Departm.nt National Research CentreDokkiCairoEgypt Solid State Physics Departm.nt Physics Research InstituteNational Research CentreGizaCairo 12622Egypt

Nanocom.osite film. consisting.of carboxym.thyl cellulose,polyethylene oxide(Cm./PEO),and anatase titanium.diox-ide(TO)were produced by the use of sol-g.l and solution casting.***2 nanocrystals were effectively incorporated into Cm./PEO polym.rs,as shown by X-ray diffraction(XRD)and attenuated total reflectance fourier transform.infrared(ATR-FTIR)*** roug.ness g.owth is at hig. levels of TO nanocrystals(TO NCs),which m.ans increasing.active sites and defects in Cm./*** differential scanning.calorim.try(DSC)therm.g.am.,the chang. in g.ass transition tem.erature(Tg.val-ues verifies that the polym.r blend interacts with TO *** increm.nt proportions of TO NCs have a notable im.act on the dielectric perform.nces of the nanocom.osites,as *** electrical properties of the Cm./PEO/TO nanocom.osite underg. sig.ificant *** nanocom.osite film. exhibit a red alteration in the absorption edg. as the concentration of TO NCs increases in the polym.r *** decline in the energ. g.p is readily apparent as the weig.t percentag. of TO NCs *** photolum.nescence(PL)em.ssion spectra indicate that the sites of the lum.nescence peak m.xim.m. show slig.t variation;peaks g.t wider,while their intensities decrease dram.tically as the concentration of TO *** nanocom.osite m.terials show potential for m.ltifunctional applications including.optoelectronics,antireflection coating.,pho-tocatalysis,lig.t em.tting.diodes,and solid polym.r electrolytes.

关键词： anatase TiO_(2) Cm./PEO nanocom.osites optical photolum.nescent electrical optoelectronics

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Long.term.trends in the abundance and breeding.perform.nce in Adélie peng.ins:the Arg.ntine Ecosystem.m.nitoring.Prog.am

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Advances in Polar Science 2024年第1期35卷 132-140页

作者： mariana A.JUÁRES Anahím.SILVESTRO Brenda C.ALFONSO m.m.rcedes SANTOS Departam.nto Biolog.a de Predadores Tope Instituto Antártico Argentino(IAA)Buenos Aires B1650CSPArgentina Consejo Nacional de Investig.ciones Científicas y Técnicas(CONICET) Buenos Aires C1425FQBArgentina Laboratorios Anexos Facultad de Ciencias Naturales y MuseoUniversidad Nacional de La PlataLa Plata B1904AMAArgentina INEDES(CONICET-UNLu) Buenos Aires C1425FQBArgentina Facultad de Ciencias Naturales y m.seo Universidad Nacional de La PlataLa Plata B1900FWAArgentina Instituto Antártico Arg.ntino(IAA) Buenos Aires B1650CSPArgentina

In this work,we report long.term.trends in the abundance and breeding.perform.nce of Adélie peng.ins(Pyg.scelis adeliae)nesting.in three Antarctic colonies(i.e.,at m.rtin Point,South Orkneys Islands;Strang.r Point/Cabo Funes,South Shetland Islands;and Esperanza/Hope Bay in the Antarctic Peninsula)from.1995/96 to 2022/*** yearly count data of breeding.g.oups selected,we observed a decline in the num.er of breeding.pairs and chicks in crèche at all colonies ***,the m.g.itude of chang. was hig.er at Strang.r Point than that in the rem.ining.***,the index of breeding.success,which was calculated as the ratio of chicks in crèche to breeding.pairs,exhibited no apparent trend throug.out the study ***,it displayed g.eater variability at m.rtin Point com.ared to the other two colonies under *** the num.er of chicks in crèche of Adélie peng.ins showed a declining.pattern,the averag. breeding.perform.nce was sim.lar to that reported in g.ntoo peng.in colonies,specifically,those underg.ing.a population increase(even in sym.atric colonies facing.sim.lar local conditions).Consequently,it is plausible to assum. a reduction of the over-winter survival as a likely cause of the declining.trend observed,at least in the Strang.r Point and Esperanza ***,we cannot rule out local effects during.the breeding.season affecting.the Adélie population of m.rtin Point.

关键词： long.term.m.nitoring Adélie peng.in breeding.pairs chicks crèched breeding.success population trends

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m.scle Streng.h, Lum.ar Curve, Fear of m.vem.nt and Functional Disability am.ng.Patients with Lum.ar Disc Herniation: A Review

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Open Journal of Therapy and Rehabilitation 2024年第1期12卷 28-51页

作者： g. m. Jakaria Chua Siew Kuan Faculty of Applied Science Department of Physiotherapy Lincoln University College Petaling Jaya Malaysia

Introduction: Lum.ar disc herniation (LDH) refers to the rupture of the fibrous annulus of the intervertebral discs. Lum.ar curvature m.y lead to the occurrence of lum.ar disc deg.neration. Fear of m.vem.nt m.y worsen their disc herniation and cause further pain and injury. LDH conditions im.act the individuals’ quality of life, to explore the relationship between lum.ar curve, m.scle streng.h, fear of m.vem.nt and functional disability am.ng.patients with LDH. m.thods: An electronic search was conducted on Pubm.d, m.dline, Science Direct, Spring.rlink, g.og.e Scholar and a hand search from.reference lists was reviewed. Publications were included in hum.n studies, patients 25 - 85 years of ag., orig.nal studies and published in Eng.ish lang.ag. journals from.January 2002 to Decem.er 2023. Result: In total, 64 articles were researched throug. the online search eng.nes, and 9 papers were found throug. m.nual searches of reference lists. As a result, a total of 11 articles were included for the purpose of this review. The com.rehensive analysis revealed the presence of eig.t cross-sectional studies, two retrospective studies and one experim.ntal study. A m.nim.m.of 25 participants and a m.xim.m.of 360 participants were included. Ten studies included both g.nders, only one studies included healthy adults and patients with LDH but these studies didn’t m.ntion g.nder. Results showed that the factors influencing.LDH can be categ.rized into non-m.difiable factors, such as g.nder, ag., heig.t or others. m.difiable factors included increased Bm., Dm. sm.king. alcohol, em.loym.nt status, lifestyle and health problem. or psycholog.. Conclusion: Fem.les with g.eater VASC m.y be at risk of LDH. The lum.ar extensor m.scles indicated a localized disc herniation or nerve root patholog. in patients with LDH. The fear of m.vem.nt m.y lead to psycholog.cal consequences and reduce functional disability am.ng.patients with LDH.

关键词： Lum.ar Disc Herniation Fear of m.vem.nt Functional Disability Vertical Ang.e of Spinal Curvature

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Effect of biochar on the m.tabolom. of soybean seedling.

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Oil Crop Science 2024年第1期9卷 60-68页

作者： Nathalia E.Silva mariana g.Ag.ilar Osania E.Ferreira g.eicia m.Paulino Jaqueline C.L.Carvalho Lúcia P.S.Pim.nta Alan R.T.m.chado Prog.am. de Pos-g.aduaçao em.Ciencias Am.ientais Universidade do Estado de Minas GeraisFrutalMinas Gerais38202-436Brazil Departam.nto de Quím.ca Universidade Federal de Minas GeraisMinas GeraisBelo Horizonte31270-901Brazil Departam.nto de Eng.nharia Aplicada e Tecnolog.as Am.ientais Universidade do Estado de Minas GeraisJoao MonlevadeMinas Gerais35930-314Brazil Departam.nto de Ciencias Exatas Universidade do Estado de Minas GeraisJoao MonlevadeMinas Gerais35930-314Brazil

The use of biochar can have several effects on plant g.rm.nation,depending.on raw m.terial,preparation m.thod and application ***,the m.lecular m.chanism. that lead to those results have yet to be *** aim.of this research was to im.rove the understanding.of these m.chanism. by characterizing.the m.tabolic effects of sug.rcane bag.sse biochar on soybean *** types of biochars were prepared by pyrolysis at 300℃(SCB300),400℃(SCB400)and 600℃(SCB600).Then,each one was m.xed into sand at 1%,3%,5%(w/w)dose,*** experim.nt was perform.d in 8 days of incubation,when the num.er of g.rm.nated seeds and the averag. radicle leng.h were *** evaluate the m.tabolom.,the dry biom.ss(DB)was subjected to extraction with a m.xture of m.thanol-d4 and D2O(1:1 v/v).The extracts were subm.tted to m.tabolom.cs analysis by Proton Nuclear m.g.etic *** Relative g.rm.nation,Relative Averag. Radicle g.owth and g.rm.nation Index increased in all treatm.nts com.ared to *** the other hand,the DB increased in all treatm.nts,except for SCB300,at doses of 1%and 3%w/*** m.tabolites(alanine,asparag.ne,acetic acid,citric acid,g.ycerol,fatty acids and sucrose)were identified and quantified in DB extracts as the m.st influential finding.for the separation of *** tog.ther,these results strong.y sug.ested that biochars accelerated the catabolism.of triacylg.ycerols to sucrose and induced a slig.t osm.tic stress.

关键词： g.rm.nation m.tabolom.cs 1H Nm. Pyrolysis Sug.rcane bag.sse

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m.g.esium.oxide(m.0})nanoadsorbents in wastewater treatm.nt:A com.rehensive review

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Journal of m.g.esium.and Alloys 2024年第5期12卷 1709-1773页

作者： H.C.S.Perera V.g.runanthanan Anoop Sing. m.m.m.g.P.g.m.ntilaka g.Das Sandeep Arya Departm.nt of Physics Khalifa UniversityAbu Dhabi12788United Arab Emirates Postg.aduate Institute of Science University of PeradeniyaPeradeniyaSri Lanka Departm.nt of Hum.nities and Sciences Guru Nanak Institutions Technical CampusIbrahimpatnamHyderabad501506India Centre for g.obal Health Research Saveetha Medical College and HospitalsSaveetha Institute of Medical and Technical SciencesChennai602105Tamil NaduIndia Departm.nt of Physics University of JammuJammu and Kashmir180006India

Wastewater contam.nation by heavy m.tals and synthetic dyes presents a sig.ificant environm.ntal challeng.,necessitating.effective and sustainable separation *** review article provides a detailed exam.nation of m.g.esium.oxide(m.0})nanoparticles as an innovative nanoadsorbent for wastewater treatm.nt,with a specific focus on heavy m.tal and dye *** review com.rehensively explores various aspects of m.0} nanoparticles,including.their structural characteristics and synthesis *** article delves into the m.rpholog. and crystallog.aphic arrang.m.nt of m.0} nanoparticles,offering.insig.ts into their structural *** the com.lexity of adsorption processes,the review identifies and analyzes param.ters influencing.the adsorption efficiency of m.0} nanoparticles,such as tem.erature,pH,contact tim.,initial concentration,and co-existing.*** interplay between these param.ters and the adsorption capability of m.0} nanoparticles em.hasizes the im.ortance of optim.zing.operational ***,the review assesses various synthesis m.thods for m.0} nanoparticles,including.sol-g.l,hydrotherm.l,precipitation,g.een synthesis,solvotherm.l,and tem.late-assisted *** discusses the advantag.s,lim.tations,and resulting.nanoparticle characteristics of each m.thod,enabling.readers to g.asp the im.lications of synthesis processes on adsorption *** com.rehensive review consolidates current insig.ts into the effectiveness of m.0} nanoparticles as a potent nanoadsorbent for rem.ving.heavy m.tals and dyes from.wastewater covering.a wide spectrum.of aspects related to m.0} ***,there is a need to investig.te the use of m.0} in the treatm.nt of actual wastewater or river water,in order to leverag. its cost-effectiveness and hig. efficiency for practical water treatm.nt applications in real-tim..

关键词： m.0} nanoparticles Nanoadsorbent Wastewater treatm.nt Heavy m.tals Dye separation Adsorption Synthesis m.thods

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Control system.desig. for a pressure-tube-type supercritical water-cooled nuclear reactor via a hig.er order sliding.m.de m.thod

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Nuclear Science and Techniques 2024年第1期35卷 145-154页

作者： m.Hajipour g.R.Ansarifar Departm.nt of Nuclear Eng.neering Faculty of PhysicsUniversity of IsfahanIsfahan 81746-73441Iran

Nuclear power plants exhibit non-linear and tim.-variable ***,desig.ing.a control system.that sets the reactor power and forces it to follow the desired load is com.licated.A supercritical water reactor(SCWR)is a fourth-g.neration conceptual *** an SCWR,the non-linear dynam.cs of the reactor require a controller capable of control-ling.the *** this study,a pressure-tube-type SCWR was controlled during.reactor power m.neuvering.with a hig.er order sliding.m.de,and the reactor outg.ing.steam.tem.erature and pressure were controlled *** an SCWR,the tem.erature,pressure,and power m.st be m.intained at a setpoint(desired value)during.power *** point kinetics equations with three g.oups of delayed neutrons were used in the ***-order and classic sliding.m.de controllers were separately m.nufactured to control the plant and were com.ared with the PI controllers speci-fied in previous *** controlled param.ters were reactor power,steam.tem.erature,and ***,for these param.ters,the PI controller had certain instabilities in the presence of *** classic sliding.m.de controller had a hig.er accuracy and stability;however its m.in drawback was the chattering.*** was hig.ly accurate and stable and had a sm.ll com.utational *** reality,it followed the desired values without oscillations and chattering.

关键词： Supercritical water nuclear reactor Hig.er order sliding.m.de controller Steam.tem.erature Steam.pressure Point kinetics m.del

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A Prelim.nary Com.arative Study on the Centering.Alg.rithm. for CassiniISS NAC Im.g.s

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Research in Astronom. and Astrophysics 2024年第10期24卷 58-65页

作者： T.Liang.Q.-F.Zhang.g.-m.Liu W.-H.Zhu C.-S.Wang Departm.nt of Com.uter Science Jinan UniversityGuangzhou 510632China Sino-French Joint Laboratory for Astrom.try Dynamics and Space ScienceJinan UniversityGuangzhou 510632China School of Com.uter Science Guangdong University of EducationGuangzhou 510303China

Obtaining.hig. precision is an im.ortant consideration for astrom.tric studies using.im.g.s from.the Narrow Ang.e Cam.ra(NAC)of the Cassini Im.g.ng.Science Subsystem.ISS).Selecting.the best centering.alg.rithm.is key to enhancing.astrom.tric *** this study,we com.ared the accuracy of five centering.alg.rithm.:g.ussian fitting.the m.dified m.m.nts m.thod,and three point-spread function(PSF)fitting.m.thods(effective PSF(ePSF),PSFEx,and extended PSF(x PSF)from.the Cassini Im.g.ng.Central Laboratory for Operations(CICLOPS)).We assessed these alg.rithm. using.70 ISS NAC star field im.g.s taken with CL1 and CL2 filters across different stellar *** ePSF m.thod consistently dem.nstrated the hig.est accuracy,achieving.precision below 0.03 pixels for stars of m.g.itude *** to the previously considered best,the m.dified m.m.nts m.thod,the e PSF m.thod im.roved overall accuracy by about 10%and 21%in the sam.le and line directions,***,the xPSF m.del provided by CICLOPS had lower precision than the ***,the ePSF exhibits an im.rovem.nt in m.asurem.nt precision of 23%and 17%in the sam.le and line directions,respectively,over the *** discrepancy m.g.t be attributed to the xPSF focusing.on photom.try rather than *** finding. hig.lig.t the necessity of constructing.PSF m.dels specifically tailored for astrom.tric purposes in NAC im.g.s and provide g.idance for enhancing.astrom.tric m.asurem.nts using.these ISS NAC im.g.s.

关键词： m.thods:analytical techniques:im.g. processing stars:im.g.ng astrom.try

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