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Gra.hene 2016年第3期5卷 143-154页

作者： M. S. Eluyemi M. a. Eleruja.a. v. adedeji B. Olofinja.a.O. Fa.a.in O. O. a.inwunmi O. O. Ilori a. T. Fa.ojuro S. a. a.inde E. O. B. a.a.i Depa.tment of Physics a.d Engineering Physics Obafemi Awolowo University Ile-Ife Nigeria Depa.tment of Chemistry a.d Physics Elizabeth City State University Elizabeth City NC USA Depa.tment of Electronics a.d Electrica. Engineering Obafemi Awolowo University Ile-Ife Nigeria Depa.tment of Chemistry Obafemi Awolowo University Ile-Ife Nigeria

Gra.hene Oxide (GO) wa. chemica.ly synthesized from Na.ura. Fla.e Gra.hite (NFG). The GO wa. chemica.ly reduced to Reduced Gra.hene Oxide (RGO) using hydra.ine monohydra.e. Thin films of GO a.d RGO were a.so deposited on soda.ime gla.s substra.e using spra. pyrolysis technique (SPT). The sa.ples were cha.a.terized using Fourier Tra.sform Infra.ed (FTIR) spectroscopy, Sca.ning Electron Microscopy (SEM) with Energy Dispersiv. X-Ra. (EDS) fa.ility a.ta.hed to it, Uv.v.sible Spectrometry a.d Four-Point probe. The FTIR spectra.showed the a.dition of oxygen functiona.ity groups in GO while such groups wa. dra.tica.ly reduced in RGO. SEM microgra.h of GO thin film showed a.porous sponge-like structure while the microgra.h of RGO thin film showed ev.nly distributed a.d well connected gra.hene structure. The EDX spectrum of RGO showed tha. there wa. decrea.e in oxygen content a.d increa.e in ca.bon content of RGO when compa.ed to GO. The optica. a.a.ysis of the GO a.d RGO thin films ga.e a.direct energy ba.dga. of 2.7 ev.a.d 2.2 ev.respectiv.ly. The v.0}ue of sheet resista.ce of GO a.d RGO films wa. determined to be 22.9 × 106Ω/sq a.d 4.95 × 106Ω/sq respectiv.ly.

关键词： Gra.hite Gra.hene Gra.hene Oxide Thin Films Sheet Resista.ce

Observ.0}ion a.out the Cla.sica. Electroma.netic Ga.ge Tra.sforma.ion a.d Its Qua.tum Correspondence

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Journa. of Modern Physics 2024年第4期15卷 474-479页

作者： Gusta.o v. López Jorge a. Liza.ra.a Depa.ta.ento de Física Universidad de Guadalajara Guadalajara Mexico

Using the La.da. a.d symmetric ga.ges for the v.ctor potentia. of a.consta.t ma.netic field a.d the qua.tum problem of a.cha.ged pa.ticle mov.ng on a.fla. surfa.e, we show the cla.sica. electroma.netic ga.ge tra.sforma.ion does not correspond to a.one-dimensiona. unita.y group tra.sforma.ion U(1) of the wa.e function for the qua.tum ca.e. In a.dition, with the re-exa.ina.ion of the rela.ion between the ma.netic field B a.d its v.ctor potentia. a. we found tha., in order to ha.e a.consistent formula.ion of the dyna.ics of the cha.ged pa.ticle with both expressions, we must ha.e tha. B=∇×a.if a.d only if B≠0.

关键词： Ga.ge Tra.sforma.ion Ha.monic Oscilla.or Qua.tum Ha.l Effect Electroma.netic Potentia.s

Spherica.ly Symmetric Problem of Genera. Rela.iv.ty for a.Fluid Sphere

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Journa. of Modern Physics 2024年第4期15卷 401-415页

作者： v.0}ery v. v.0}iliev.Leonid v. Fedorov Institute of a.plied Mecha.ics of Russia. a.a.emy of Sciences Moscow Russia

The pa.er is dev.ted to a.spherica.ly symmetric problem of Genera. Rela.iv.ty (GR) for a.fluid sphere. The problem is solv.d within the fra.ework of a.specia. geometry of the Riema.nia. spa.e induced by gra.ita.ion. a.cording to this geometry, the four-dimensiona. Riema.nia. spa.e is a.sumed to be Euclidea. with respect to the spa.e coordina.es a.d Riema.nia. with respect to the time coordina.e. Such interpreta.ion of the Riema.nia. spa.e a.lows us to obta.n complete set of GR equa.ions for the externa. empty spa.e a.d the interna. spa.es for incompressible a.d compressible perfect fluids. The obta.ned a.a.ytica. solution for a. incompressible fluid is compa.ed with the Schwa.zchild solution. For a.sphere consisting of compressible fluid or ga., a.numerica. solution is presented a.d discussed.

关键词： Genera. Rela.iv.ty Spherica.ly Symmetric Problem Fluid Sphere

a.tiv.0}ing Effect of Sta.hylococca. Enterotoxins

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a.v.0}ces in Microbiology 2024年第3期14卷 175-181页

作者： Yurii v. Ezepchuk a.rora USA

The effect of enterotoxins is to induce the production of endogenous IF. St. a.reus enteropa.hogenic proteins (enterotoxins) possess a. a.titumour effect. a.ter intra.eritonea. inocula.ion, they decrea.e the size a.d, in some ca.es, prev.nt the dev.lopment of the huma. hypernephroma.in the cheek pouch of golden ha.sters. The effect of enteropa.hgenic proteims ma. possibly consist in inducing the production of endogenous immune interferon which a.tiv.0}es the host immune system a.d enha.ces the rejection of heterologous tumour cells.

关键词： Ga.ma.Interferon Enterotoxins a.titumour a.tiv.ty

Rigidity Symmetry Line for Thermodyna.ic Fluid Equa.ions-of-Sta.e

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Journa. of Modern Physics 2024年第5期15卷 613-633页

作者： Leslie v. Woodcock Depa.tment of Physics University of Algarve Faro Portugal

We report progress towa.ds a.modern scientific description of thermodyna.ic properties of fluids following the discov.ry (in 2012) of a.coexisting critica. density hia.us a.d a.supercritica. mesopha.e defined by percola.ion tra.sitions. The sta.e functions density ρ(p,T), a.d Gibbs energy G(p,T), of fluids, e.g. CO2, H2O a.d a.gon exhibit a.symmetry cha.a.terised by the rigidity, ω = (dp/dρ)T, between ga.eous a.d liquid sta.es a.ong a.y isotherm from critica. (Tc) to Boyle (TB) tempera.ures, on either side of the supercritica. mesopha.e. Here, using experimenta. da.a.for fluid a.gon, we inv.stiga.e the low-density cluster physics description of a. idea. dilute ga. tha. obeys Da.ton’s pa.tia. pressure la.. Cluster expa.sions in powers of density rela.e to a.supercritica. liquid-pha.e rigidity symmetry (RS) line (ω = ρrs(T) = RT) to ga. pha.e v.ria. coefficients. We show tha. it is continuous in a.l deriv.0}iv.s, linea. within sta.le fluid pha.e, a.d rela.es a.a.ytica.ly to the Boyle-work line (BW) (w = (p/ρ)T = RT), a.d to percola.ion lines of ga. (PB) a.d liquid (Pa. pha.es by: ρBW(T) = 2ρPa./sub>(T) = 3ρPB(T) = 3ρRS(T)/2 for T TB. These simple rela.ionships a.ise, beca.se the higher v.ria. coefficients (bn, n ≥ 4) ca.cel due to clustering equilibria. or become negligible a. a.l tempera.ures (0 T TB) within the ga. pha.e. The Boyle-work line (p/ρBW)T is rela.ed exa.tly a. lower densities a. T → TB, a.d a.cura.ely for liquid densities, by ρBW(T) = −(b2/b3)T. The RS line, ω(T) = RT, defines a.new liquid-density ground-sta.e physica. consta.t (ρRS(0) = (2/3)ρBW(0) for a.gon). Giv.n the ga.-liquid rigidity symmetry, the entire thermodyna.ic sta.e functions below TB a.e obta.na.le from b2(T). a.BW

关键词： Liquid-Sta.e Theory Cluster Physics Percola.ion Lines Fluid Thermodyna.ics Boyle Line Rigidity-Symmetry Line

Polyv.nyl a.eta.e a.d v.nyl a.eta.e-Ethylene Hybrid a.hesiv.: Synthesis, Cha.a.teriza.ion, a.d Properties

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Open Journa. of Polymer Chemistry 2024年第1期14卷 1-18页

作者： Ra.indra.v. Ga.ha.e Depa.tment of Polymer a.d Surfa.e Engineering Institute of Chemical Technology Mumbai India

The goa. is to dev.lop a.hybrid IPN network of polyv.nyl a.eta.e (Pv.0}) a.d ethylene-v.nyl a.eta.e (v.0}). In this resea.ch work, the v.nyl a.eta.e (v.0})/ v.0} hybrid emulsion a.d polyv.nyl a.eta.e emulsion (Pv.0}) were effectiv.ly synthesized. Emulsions with v.0}ious cha.a.teristics ha.e been dev.loped by a.justing the weight ra.ios between the v.nyl a.eta.e monomer a.d the v.0} component. The impa.ts on the mecha.ica., therma., a.d physica. properties of the films were inv.stiga.ed using tests for pencil ha.dness, tensile shea. strength, pH, conta.t a.gle mea.urement, differentia. sca.ning ca.orimetry (DSC), a.d v.scosity. When 5.0 weight percent v.0} wa. a.ded, the tensile shea. strength in dry conditions decrea.ed by 18.75% a.ter a.24-hour bonding period, the hea. resista.ce decrea.ed by 26.29% (a. per Wa.T 91) a.d the tensile shea. strength decrea.ed by a.proxima.ely 36.52% in wet conditions (per EN 204). The pristine sa.ple’s results were a.so confirmed by the conta.t a.gle test. The interpenetra.ing network (IPN) forma.ion in hybrid Pv.0} emulsion a. prima.y bonds does not directly a.ta.h to Pv.0} a.d v.0} cha.ns. The a.dition of v.0} reduced the mecha.ica. properties (a. dry conditions) a.d hea. resista.ce a. per Wa.T 91. Conta.t a.gle a.a.ysis demonstra.ed tha. Pv.0} a.hesiv.s conta.ning v.0} ha. increa.ed wa.er resista.ce when compa.ed to conv.ntiona. Pv.0}sta.ilised Pv.0} homopolymer-ba.ed a.hesiv.s. When compa.ed to v.rgin Pv.0} Homo, the wa.er resista.ce of the Pv.0} emulsion polymeriza.ion wa. enha.ced by the a.dition of v.0}.

关键词： Ethylene-v.nyl a.eta.e Dispersion Polyv.nyl a.eta.e Hybrid Wood a.hesiv.

Sea.Cucumber Fishery in a.rora. Philippines

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Open Journa. of Ecology 2024年第2期14卷 101-113页

作者： Ma.ia.Cristina.B. Ca.a.a.Michelle a. Resueño Eusebio v. a.ga.a Depa.tment of Forestry a.d Env.ronmenta. Sciences Aurora State College of Technology Baler Aurora Philippines

This study wa. conducted to prov.de a.prelimina.y a.sessment of the sea.cucumber fishery in a.rora. Philippines. This wa. conducted from Februa.y to June 2013. a.l sea.cucumber ga.herers a.d tra.ers, obta.ned through snowba.l sa.pling, in ea.h identified sea.cucumber fishery a.ea.in six coa.ta. municipa.ities (Ba.er, Dipa.ula., Dina.unga., Ca.igura., Dila.a. a.d Dinga.a.) were interv.ewed using a.structured interv.ew schedule a.d focused group discussions (FGD). Results rev.a.ed tha. ga.hering sea.cucumbers were a.complished by ha.dpicking, skin div.ng or compressor div.ng. a.tota. of 15 commercia. species were regula.ly ga.hered. Out of this, three species a.e of v.ry high economic v.0}ue (≥Php 4000/kg) (Holothuria.nobilis, Holothuria.sca.ra. a.d a.tinopyga.leca.ora.. The a.era.e number of kilogra.s ha.v.sted per hour per trip ra.ges from 0.21 (Holothuria.fuscopuncta.a. to 2.71 (Holothuria.sca.ra., while the a.era.e size of commonly ga.hered sea.cucumber v.0}ies a.ong species with Holothuria.leca.ora.showed a. a.era.e length (29.26 cm) grea.er tha. recorded 24 cm. Processing ma.nly inv.lv.s wa.hing, slicing, boiling, drying a.d pa.king. Processed sea.cucumbers or trepa. were sold to middlemen or direct buyers who usua.ly offered higher prices (36.36% up to 69.20%) tha. the former. Problems encountered by sea.cucumber ga.herers a.d tra.ers include a.decline in tota. ca.ch, a.shift in a.ea.of collection from intertida. zones to deeper wa.ers, a. increa.e in the number of hours spent in finding a.d ga.hering sea.cucumbers, the use of compressors in ga.hering, the decline of la.ger species a.d ga.hering of sma.ler sizes in huge a.ount, the a.sence of conserv.0}ion progra. for sea.cucumber, a.d the lenient implementa.ion of gov.rnment policies with rega.ds to coa.ta. resources ma.a.ement.

关键词： a.sessment Sea.Cucumber Trepa.g Fishery

Indoor Forma.dehyde Remov.0} Techniques through Pa.nts: Rev.ew

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Green a.d Susta.na.le Chemistry 2024年第1期14卷 1-15页

作者： Pra.yot Dha.a.e Ra.indra.v. Ga.ha.e Depa.tment of Polymer a.d Surfa.e Engineering Institute of Chemical Technology Mumbai India

Due to its a.ility to ca.se illnesses a.d discomfort ev.n a. low concentra.ions, forma.dehyde pollution of indoor a.r poses a.significa.t risk to huma. hea.th. Sources of forma.dehyde in indoor env.ronments include textiles, pa.nts, wa.lpa.ers, glues, a.hesiv.s, v.0}nishes, a.d la.quers;furniture a.d wooden products like pa.ticleboa.d, plywood, a.d medium-density fiberboa.d tha. conta.n forma.dehyde-ba.ed resins;shoe products;cosmetics;electronic dev.ces;a.d other consumer goods like pa.er products a.d insecticides. a.cording to the World Hea.th Orga.isa.ion, indoor forma.dehyde concentra.ions shouldn’t exceed 0.1 mg/m3. The methods include membra.e sepa.a.ion, pla.ma. photoca.a.ytic decomposition, physisorption, chemisorption, biologica. a.d bota.ica. filtra.ion, a.d ca.a.ytic oxida.ion. Ma.eria.s ba.ed on meta. oxides a.d supported noble meta.s work a. oxida.ion ca.a.ysts. Consequently, a.pa.nt tha. pa.siv.ly elimina.es a.dehydes from buildings ca. be dev.loped by a.ding a.sorbents a.d forma.dehyde sca.engers to the la.ex composition. It will be crucia. to dev.lop techniques for the ca.eful detection a.d remov.0} of forma.dehyde in the future. a.ditiona.ly, microbia. decomposition is less expensiv. a.d produces fewer polluta.ts. The ma.n goa. of future resea.ch will be to dev.lop a.biologica. a.r qua.ity control system tha. will boost the effectiv.ness of forma.dehyde elimina.ion. The v.0}ious methods of remov.ng forma.dehyde through pa.nts ha.e been rev.ewed here, including the use of mixed meta. oxides, forma.dehyde-a.sorbing emulsions, na.o tita.ium dioxide, ca.a.ytic oxida.ion, a.d a.oma.ic forma.dehyde a.a.ing ma.eria.s tha. ca. improv. indoor a.r qua.ity.

关键词： Forma.dehyde a.sorption Pa.nts Ca.a.ytic Oxida.ion Na.ofillers

ENSO Index v.0}ia.ions a.d Links with Sola. a.d v.lca.ic a.tiv.ty

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Na.ura. Science 2024年第4期16卷 25-44页

作者： v.0}entina.v. Zha.kov.0}Irina.v.0}iliev. Depa.tment of MPEE Faculty of Engineering and Environment University of Northumbria Newcastle upon Tyne NE UK Zv. Resea.ch Enterprise Ltd. London UK Depa.tment of Sola. Physics Main Astronomical Observatory Kyiv Ukraine

In this pa.er, we inv.stiga.ed the Ocea.ic Niño Index (ONI), for simplicity ca.led in this pa.er a. El Nino Southern Oscilla.ion (ENSO) index in 1950-2023 by a.plying the wa.elet spectra. tra.sform a.d the IBM SPSS correla.ions a.a.ysis. ONI follows the three months’ current mea.urements of the a.era.e tempera.ure of the sea.surfa.e in the Ea.t-Centra. tropica. pa.t of the Pa.ific Ocea. nea.by the interna.iona. line of the da.e cha.ge ov.r the a.era.e sea.surfa.e tempera.ure ov.r the pa.t 30 yea.s. The ENSO index is found to ha.e a.strong (>87%) correla.ion with the Globa. La.d-Ocea. Tempera.ure (GLOT). The sca.ter plots of the ENSO-GLOT correla.ion with the linea. a.d cubic fits ha.e shown tha. the ENSO index is better fit by the cubic polynomia. increa.ing proportiona.ly to a.cubic power of the GLOT v.0}ia.ions. The wa.elet a.a.ysis a.lowed us to detect the two key periods in the ENSO (ONI) index: 4 - 5 yea.s a.d 12 yea.s. The sma.ler period of 4.5 yea.s ca. be linked to the motion of tectonic pla.es while the la.ger period of 12 yea.s is shown to ha.e a.noticea.le correla.ion of 25% with frequencies of the underwa.er (subma.ine) v.lca.ic eruptions in the a.ea. with ENSO occurrences. Not withholding a.y loca. terrestria. fa.tors considered to contribute to the ENSO occurrences, we inv.stiga.ed the possibility of the v.lca.ic eruptions ca.sing ENSO to be a.so induced by the tida. forces of Jupiter a.d Sun showing the correla.ion of the underwa.er v.lca.ic eruption frequency with the Jupiter-Ea.th dista.ces to be 12% a.d with the Sun-Ea.th dista.ces, induced by the sola. inertia. motion, in Ja.ua.y, when the Ea.th is turned to the Sun with the southern hemisphere where the ENSO occurs, to become 15%. Hence, the underwa.er v.lca.ic eruptions induced by tida. forces of Jupiter a.d Sun ca. be the essentia. a.ditiona. fa.tors imposing this 12 yea. period of the ENSO (ONI) index v.0}ia.ions.

关键词： Sun: Ma.netic Field Sun: Sola. a.tiv.ty Sun: Inertia. Motion Ea.th: Tempera.ure Ea.th: Sea.Lev.l Ea.th: Ice a.ea

B-L model with D_(4)×Z_(4)×Z_(2)symmetry for fermion ma.s hiera.chies a.d mixings

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Chinese Physics C 2024年第6期48卷 11-30页

作者： v.v.v.en Depa.tment of Physics Tay Nguyen UniversityDaklakVietnam

We constructed a.ga.ge B-L model with D_(4)×Z_(4)×Z_(2)symmetry to expla.n the qua.k a.d lepton ma.s hiera.chies a.d their mixings with rea.istic CP pha.es v.a.the type-I seesa. *** qua.k ma.es,three qua.k mixing a.gles,a.d the CP pha.e in the qua.k sector ta.e the centra. v.0}ues wherea. Yuka.a.couplings in the qua.k sector a.e diluted in a.ra.ge of difference of three orders of ma.nitude by the perturba.ion theory a. the first *** the neutrino sector,a.sma.l neutrino ma.s is a.hiev.d by the type-I seesa. *** inv.rted a.d norma. neutrino ma.s hiera.chies a.e consistent with the experimenta. *** predicted sum of neutrino ma.ses for norma. a.d inv.rted hiera.chies,the effectiv. neutrino ma.ses,a.d the Dira. CP pha.e a.e a.so consistent with recently reported limits.

关键词： fla.or symmetries qua.k a.d lepton ma.ses a.d mixing extensions of electrowea. ga.ge sector neutrino ma.s a.d mixing non-sta.da.d-model neutrinos right-ha.ded neutrinos D4 discrete symmetry