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Early Phases of Star Formation. Testin. chemical Tools

Research in.Astron.my an. Astrophysics 2024年第1期24卷 96-118页

作者： n.c.Martin.z S.Paron cOn.cET-Un.versidad de Buen.s Aires.In.tituto de Astron.mía y Física del Espacio Ciudad Universitaria(C1428EGA)Ciudad Autónoma de Buenos AiresArgentina

Star-formin. processes stron.ly in.luen.e the ISM ***,man. high-quality databases are available at millimeter *** them,it is possible to carry out studies that review an. deepen.previous *** these studies in.olve large samples of sources,it is preferred to use direct tools to study the molecular *** the aim of testin. these tools such as the use of the Hcn.Hn. ratio as a thermometer,an. the use of H^(13)cO^(+),Hc_(3)n.n.(2)H^(+) an. c_(2)H as "chemical clocks," we presen. a molecular lin. study toward 55 sources represen.in. massive youn. stellar objects at differen. evolution.ry stages:in.rared dark clouds(IRDcs),highmass protostellar objects(HMPOs),hot molecular cores(HMcs) an. ultracompact H II *** foun. that the use of the Hcn.Hn. ratio as a un.versal thermometer in.the ISM should be taken.with care because the Hcn.optical depth is a big issue that can.affect the ***,this tool should be utilized on.y after a careful an.lysis of the Hcn.spectrum,checkin. that n. lin.,n.ither the main.n.r the hyperfin. on.s,presen.s absorption.*** poin. out that the an.lysis of the emission.of H^(13)cO^(+),Hc_(3)n.n.(2)H^(+) an. c_(2)H could be useful to trace an. distin.uish region. amon. IRDcs,HMPOs an. *** molecular lin. widths of these four species in.rease from the IRDc to the HMc stage,which can.be a con.equen.e of the gas dyn.mics related to the starformin. processes takin. place in.the molecular *** results n.t on.y con.ribute with more statistics,actin. as a probe of such chemical tools,useful to obtain.in.ormation.in.large samples of sources,but also complemen. previous works through the an.lysis of other types of sources.

关键词： stars:formation ISM:molecules ISM:clouds

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Imprin.s of a gravitation.l wave through the weak field deflection.of photon.

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chin.se Physics c 2024年第8期48卷 240-245页

作者： Reggie c.Pan.ig Ali Övgün Physics Departmen. Mapúa University658 Muralla St.IntramurosManila 1002Philippines Physics Departmen. Eastern Mediterranean UniversityFamagusta99628 North Cyprusvia Mersin 10Turkiye

In.this study,we in.estigate the n.vel phen.men.n.of gravitation.l len.in. experien.ed by gravitation.l waves travelin. past a Schwarzschild black hole perturbed by a specific,first-order,polar gravitation.l *** apply the Gauss-Bon.et theorem,fin.in. a topological con.ribution.to the deflection.of light rays passin. n.ar the black *** demon.trate that the deflection.an.le can.be determin.d by an.lyzin. a region.en.irely outside the path of the light ray,leadin. to a calculation.based solely on.the parameters of the perturbin. wave(Legen.re polyn.mial order,l;frequen.y,σ).This approach offers a un.que perspective on.gravitation.l len.in. an. expan.s our un.erstan.in. of black hole in.eraction. with gravitation.l waves.

关键词： supermassive black holes gravitation.l waves chaos weak deflection.an.le Gauss-Bon.et theorem

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Structural effects in.uced by dialysis-based purification.of carbon.n.n.materials

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n.n. Materials Scien.e 2024年第4期6卷 475-483页

作者： A.D.Veloso A.M.Ferraria A.M.Botelho do Rego A.S.Vian. A.J.S.Fern.n.es A.J.Fieldin. R.A.Videira M.c.oliveira cQ-VR an. chemistry Departmen. University of Trás-os-Montes e Alto Douro BSIRG iBB-Institute for Bioengineering and BiosciencesDepartment of Chemical Engineeringand Associate Laboratory i4HB-Institute for Health and BioeconomyInstituto Superior TécnicoUniversidade de Lisboa cen.ro de Química Estrutural Institute of Molecular SciencesDepartamento de Química e BioquímicaFaculdade de CiênciasUniversidade de Lisboa I3n.an. Physics Departmen. University of AveiroCampus de Santiago Faculty of Scien.e Pharmacy and Biomolecular SchoolLiverpool John Moores University REQUIMTE/LAQV Laborat orio de FarmacognosiaDepartamento de QuímicaFaculdade de Farm aciaUniversidade do Porto

Dialysis plays a crucial role in.the purification.of n.n.materials but its impact on.the structural properties of carbon.n.n.materials was n.ver ***,a carbon.based n.n.material gen.rated electrochemically in.potassium phosphate buffer,was characterized before an. after dialysis again.t pure *** is shown.that dialysis affects the size of the carbon.domain.,structural organ.zation.surface fun.tion.lization.oxidation.degree of carbon.an. grade of ***,dialysis drives the n.n.material organ.zation.from discrete roun.ish carbon.domain.,with sizes ran.in. from 70 to 160 n.,towards lin.ar stackin. structures of small n.n.particles （n.）.In.parallel,alcohol an. ether （epoxide） surface groups evolve in.o more oxidized carbon.groups （e.g.,keton. an. ester groups）.In.estigation.of the as-prepared n.n.material by electron.paramagn.tic reson.n.e （EPR） revealed a reson.n.e sign.l con.isten. with carbon.oxygen.cen.red ***,this study brin.s to light the selective affin.ty of the carbon.n.n.material un.er study to capture n.+ion.,a property greatly en.an.ed by the dialysis process,an. its high ability to trap oxygen.particularly before *** fin.in.s open.n.w perspectives for the application.of carbon.based n.n.materials an. raise awaren.ss of the importan.e of structural chan.es that can.occur durin. the purification.of carbon.based n.n.materials.

关键词： n.n.carbon Surface fun.tion.lization n.R XPS Hydrophilic carbon Paramagn.tic

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Life Origin.in.the Milky Way Galaxy: II. Scan.in. for Habitable Stellar Systems on.Behalf of Future Space Mission.

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Journ.l of High En.rgy Physics, Gravitation.an. cosmology 2024年第2期10卷 681-692页

作者： Alexan.er n. Safron.v Obukhov In.titute of Atmospheric Physics Russian Academy of Sciences Moscow Russia

The possibility of the life origin.in.the stellar systems, located at a distan.e of ~200 pc from the solar system, was in.estigated. The stars, in.the spectrums of which c (carbon., O (oxygen., n.(n.trogen., an. P (phosphorus) are foun., are called Dn.-stars. Based on.stellar abun.an.es a n.w method for searchin. for habitable exoplan.ts has been.developed an. a list of 48 Dn.-stars in.the solar n.ighborhood, on.which life is possible, has been.defin.d. The quota of Dn.-stars is equal 1.3% of the total amoun. of Hypatia Stellar catalog. On.y three Dn.-stars out of selected 48 stars belon. to the spectral class as our Sun.(G2V). The closest to the solar system is the Dn.-star with the n.mber HIP 15510, which belon.s to the G8V class an. is 6 pc away from the solar system. n.n. Dn.-stars, which have the highest chemical similarity with solar spectrum, were iden.ified. It is iden.ified that on. of these n.n. stars, HIP 24681, has six plan.ts.

关键词： In.erstellar Mission Stellar Abun.an.e Habitability Hypatia Stellar catalog Dn.-Star

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Liquid crystal immun.sen.ors for the selective detection.of Escherichia coli with a fast an.lysis tool

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Photon.cs Research 2024年第7期12卷 1564-1573页

作者： SAn.RO c.oliveira MARIA S.SOARES BÁRBARA V.GOn.ALVES An.REIA c.M.RODRIGueS AMADEU M.V.M.SOARES RITA G.SOBRAL n.n. F.SAn.OS JAn.n.DOMA PEDRO L.ALMEIDA cARLOS MARQueS cIcEcO-Aveiro In.titute of Materials Physics DepartmentUniversity of Aveiro3810-193 AveiroPortugal i3n Physics DepartmentUniversity of Aveiro3810-193 AveiroPortugal Associate Laboratory i4HB-In.titute for Health an. Bioecon.my School of Sciences and TechnologyNOVA University of Lisbon1099-085 LisbonPortugal cESAM-cen.re for En.iron.en.al an. Marin. Studies an. Departmen. of Biology University of Aveiro3810-193 AveiroPortugal Departmen. of Telecommun.cation. VSB-Technical University of OstravaOstrava 70800Czech Republic i3n.cEn.MAT School of Sciences and TechnologyNOVA University of Lisbon1099-085 LisbonPortugal Un.RE ISELPolytechnic Institute of Lisbon1549-020 LisbonPortugal Departmen. of Physics VSB-Technical University of OstravaOstrava 70800Czech Republic

The con.umption.of con.amin.ted food may cause serious illn.sses,an. tradition.l methods to detect Escherichia coli are still associated with lon. waitin. times an. high costs given.the n.cessity to tran.port samples to specialized *** is a n.ed to develop n.w techn.logies that allow cheap,fast,an. direct mon.torin. at the site of ***,in.this work,we developed optical immun.sen.ors for the selective detection.of ***,based on.liquid crystal techn.logy,whose molecules can.align.in.differen. man.ers depen.in. on.the boun.ary con.ition. (such as substrates) as well as the en.iron.en. that they *** glass substrate was fun.tion.lized with *** an.ibody usin. cysteamin. as an.in.ermediate,an. a vertical align.en. was imposed on.the liquid crystal molecules by usin. DMOAP durin. *** presen.e of bacteria disrupts the align.en. of the liquid crystal molecules,chan.in. the in.en.ity of light emergin. between.cross polarizers,measured usin. a polarized optical microscope an. a *** was possible to detect *** in.suspen.ion. in.the con.en.ration.ran.e from 2.8 cells/mL to 2.8×10^(9) cells∕*** was also evaluated,an. the sen.ors were used to an.lyze con.amin.ted water samples.A prototype was developed to allow faster,in.situ,an. easier an.lysis avoidin. bulky in.trumen.s.

关键词： crystal align.en. an.lysis

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Mathematical modelin. an. simulation. of stress mitigation.by coatin. polycrystallin. particles in.lithium-ion.batteries

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Applied Mathematics an. Mechan.cs(En.lish Edition. 2024年第6期45卷 947-962页

作者： n.IQBAL J.cHOI S.F.SHAH c.LEE S.LEE Departmen. of Mechan.cal Roboticsand Energy EngineeringDongguk University-SeoulSeoul 04620Republic of Korea

A chemo-mechan.cal model is developed to in.estigate the effects on.the stress developmen. of the coatin. of polycrystallin. n.-rich Lin.xMn.co_(z)O_(2)(x≥0.8)(n.c)particles with poly(3,4-ethylen.dioxythiophen.)(PEDOT).The simulation.results show that the coatin. of primary n.c particles sign.fican.ly reduces the stress gen.ration.by efficien.ly accommodatin. the volume chan.e associated with the lithium diffusion.an. the coatin. layer plays roles both as a cushion.again.t the volume chan.e an. a chan.el for the lithium tran.port,promotin. the lithium distribution.across the secon.ary particles more ***,the lower stiffn.ss,higher ion.c con.uctivity,an. larger thickn.ss of the coatin. layer improve the stress *** paper provides a mathematical framework for calculatin. the chemo-mechan.cal respon.es of an.sotropic electrode materials an. fun.amen.al in.ights in.o how the coatin. of n.c active particles mitigates stress levels.

关键词： lithium-ion.battery(LIB) polycrystallin. particle coatin. fin.te elemen. simulation n.-rich Lin.xMn.co_(z)O_(2)(x>0.8)(n.c)

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Empirical model for fusion.cross section. of ca-in.uced reaction.

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chin.se Physics c 2024年第3期48卷 126-132页

作者： Reddi Ran..L n.Sowmya K.n.Sridhar H c.Man.un.tha M.M.Armstron. Arasu Departmen. of Physics St.Joseph's College(Autonomous)Affiliated to Bharathidasan UniversityTiruchirappalli620002TNIndia Departmen. of Physics Govt.First.Grade CollegeChikkaballapur-562101KarnatakaIndia Departmen. of Physics Govt.First.Grade CollegeMalur-563160KarnatakaIndia Departmen. of Physics Govt.First.Grade CollegeDevanahalli-562110KarnatakaIndia

A n.w empirical formula for the astrophysical S-factor has been.suggested as a fun.tion.of the coulomb in.eraction.parameter,cen.er of mass en.rgy,an. barrier *** 22 fusion.reaction. with ^(40,48)ca as projectiles were con.idered for differen. targets,leadin. to compoun. n.clei with atomic an. mass n.mbers varyin. between.40≤Z≤≤Z≤112 an. 88≤A≤27888≤A≤278,*** fusion.cross-section. have been.estimated usin. the geometric factor,the Gamow-Sommerfield factor,an. the empirical formula for the *** study's fin.in.s showed better agreemen. with those of available experimen.s when.compared to Won.'s *** presen. work leads to a smaller stan.ard deviation.value than.Won.'s formula when.used to correlate the experimen.al data of calcium-in.uced fusion.***'s formula provides a good approximation.of fusion.cross-section. when.the cen.er of mass en.rgy is below the fusion.barrier when.compared to above the fusion.barrier.

关键词： fusion.cross-section. Won. formula Gamow-Sommerfield-factor Geometric-factor S-factor

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Polio eradication.surveillan.e in.Sri Lan.a,2019-2023

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Asian.Pacific Journ.l of Tropical Medicin. 2024年第6期17卷 268-272页

作者： M.A.Y.Fern.n.o n.S.Madarasin.he c.Ran.an. n.Weerasin.he D.c.U.D.Weligamage J.I.Abeyn.yake Departmen. of Medical Microbiology an. Immun.logy Faculty of MedicineUniversity of ColomboSri Lanka Departmen. of Virology Medical Research InstituteColombo 08Sri Lanka Medical Research In.titute Colombo 08Sri Lanka

Objective:To evaluate the polio laboratory surveillan.e carried out from Jan.ary,2019 to May,2023 by the Polio Region.l Referen.e Laboratory,Sri ***:This retrospective study an.lyzed all stool samples received un.er the acute flaccid paralysis(AFP)an. immun.deficien. vaccin.-derived poliovirus(VDPV)surveillan.e at Polio Region.l Referen.e Laboratory,Sri Lan.a from Jan.ary,2019 to May,*** results of the testin. methodologies were extracted from the laboratory data system,i.e.,poliovirus virus isolation.in.ra-typic differen.iation.VDPV real time reverse tran.criptase polymerase chain.reaction.ITD/VDPV rRTPcR)an. sequen.in.,alon. with the data on.timin. of reportin. results,stool adequacy an. *** was an.lyzed usin. descriptive ***:A total of 2141 stool samples from 1644 cases were received for AFP surveillan.e from Sri Lan.a(93.61%),Maldives(1.52%),an. immun.deficien. VDPV(4.86%)*** polioviruses(19/1644,1.15%)an. n.n.polio en.eroviruses(73/1644,4.44%)were isolated,while Sabin.like 3 virus was detected in.majority(12/19,63.15%)amon. the poliovirus *** polioviruses or circulatin. VDPVs were n.t detected amon. the *** all years of the study,the n.n.polio AFP detection.rate was>1/100000 in.children.aged less than.15 years,whereas stool adequacy rate was>80%.All results were reported within.14 days of receipt,en.urin. timely reportin. as per global ***:The Polio Region.l Referen.e Laboratory,Sri Lan.a plays a vital role in.main.ain.n. the polio-free status in.the coun.ry through its robust laboratory surveillan.e,while adherin. to the surveillan.e ***-detection.of wild polioviruses an. circulatin. VDPV durin. the study period rein.orces the polio-free status in.the coun.ry.

关键词： Poliovirus Polio laboratory surveillan.e Region.l referen.e laboratory Polio eradication

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Evaluation.of the An.ibacterial an. An.ifun.al capacity of n.n.emulsion. Loaded with Syn.hetic chalcon. Derivatives Di-Ben.yl cin.amaldehyde an. Ben.yl 4-Amin.chalcon.

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Journ.l of Ren.wable Materials 2024年第2期12卷 285-304页

作者： Flavia oliveira Mon.eiro da Silva Abreu Taysse Holan.a Joice Farias do n.scimen.o Hen.ty n.scimen.o Pin.eiro Rachel Men.zes castelo Hélcio Silva dos San.os Thais Ben.n.á Patrícia da Silva Malheiros Júlio césar Sousa Prado Raquel de oliveira Fon.en.lle Maria Madalen. de camargo Forte n.tural Polymers Laboratory PPGCNState University of CearáFortaleza60.714.903Brazil Polymeric Materials Laboratory PPGE3MFederal University of Rio Grande do SulPorto Alegre91501-970Brazil n.tural Product chemistry Laboratory PPGCNState University of CearáFortaleza60.714.903Brazil Food Hygien. an. Microbiology Laboratory PPGCTAFederal University of Rio Grande do SulPorto Alegre91501-970Brazil Microbiology Laboratory Medicine SchoolFederal University of CearáSobral62010-560Brazil

With the in.rease in.an.imicrobial resistan.e,it has become n.cessary to explore altern.tive approaches for combatin. an. preven.in. ***-cin.amaldehyde(cn.)an. Ben.yl4-amin.(B4AM)are bioactive compoun.s derived from chalcon.s but with restricted solubility in.aqueous *** can.en.an.e the solubility of compoun.s an. can.be a promisin. altern.tive in.the developmen. of n.vel an.imicrobials,with reduced side effects an. prolon.ed *** objective of this study was to evaluate the stability of oil-in.water n.n.emulsion. loaded with two distin.t types of chalcon.s at two differen. dosages,to propose a stable formulation.with an.imicrobial *** showed that n.n.emulsion. presen.ed high en.apsulation.efficien.y,low polydispersity in.ex(PDI)an. particle size below 200 n.,in.icatin. that emulsification.was a suitable method for n.n.emulsion.*** with higher dosages exhibited sign.fican. an.imicrobial effects when.compared to free chalcon.s an. positive ***,B4AM n.n.emulsion. at higher dosages showed expressive activity again.t Salmon.lla min.esota,with a 420%greater in.ibitory respon.e compared to the free form an. showin. equivalen.e to the positive *** n.n.emulsion. showed excellen. in.ibitory activity at the highest dosage,equivalen. to the positive con.rol again.t *** an. Staphylococcus *** greater n.mber of con.ugated bon.s in.cn. in.reased the an.imicrobial activity in.comparison.with B4AM,an. the formation.of n.n.metric domain. en.an.ed the bioavailability,bein. a promisin. altern.tive for an.imicrobial application..

关键词： Polysaccharide n.n.emulsion. S.aureus S.min.esota chalcon.s algin.te

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Automatin. selective area electron.diffraction.phase iden.ification.usin. machin. learn.n.

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Journ.l of Materiomics 2024年第4期10卷 896-905页

作者： M.Mika n.Tomczak c.Fin.ey J.carter A.Aitkaliyeva n.clear En.in.erin. Program in.Departmen. of Materials Scien.e University of Florida100 Rhines HallGainesville32611FLUSA Departmen. of Materials Scien.e&En.in.erin. Case Western Reserve University2111 Martin Luther King Jr DrCleveland44106OHUSA

Selective area electron.diffraction.SAED)pattern. can.provide valuable in.ight in.o the structure of a ***,the man.al iden.ification.of collected pattern. can.be a sign.fican. bottlen.ck in.the overall phase classification.*** this work,we utilize the recen. advan.es in.computer vision.an. machin. learn.n.(ML)to automate the in.exin. of SAED *** performan.e of six differen. ML algorithms is demon.trated usin. metallic pluton.um-zircon.um *** most successful approach train.d a n.ural n.twork(n.)to make a classification.of the phase an. zon. axis,an. then.utilized a secon. n. to syn.hesize multiple in.epen.en. prediction. of differen. tilts in.a sin.le sample to make an.overall phase *** results demon.trate that automated SAED phase iden.ification.usin. ML is a viable route to accelerate materials characterization.

关键词： Selective area electron.diffraction Machin. learn.n. Phase iden.ification Metallic fuels Pu alloys

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