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Validation of Novel Model for Identification of Thermal Conditions in the Low Corona

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Advances in Aerospace Science and Technology 2022年第1期7卷 52-84页

作者： Daniel B. Berdichevsky Jenny M. Rodríguez Gómez Luis E. Vieira Alisson Dal Lago College Park Maryland USA ifir/unr-conicet Rosario Argentina The Catholic University of America Washington D.C. USA NASA Goddard Space Flight Center Greenbelt Maryland USA Instituto Nacional de Pesquisas Espaciais INPE S&atilde o José dos Campos Brazil

The electron density and temperature key properties of the neutral-magnetized plasma in the solar corona, which are predicted with a novel model, provide an interesting window along the whole solar cycle. In this work, we test the quantitative validity of the model and prove that the Coronal Density and Temperature (CODET) is reliable. Furthermore, this work contrasts the CODET model results with alternative observational remote and in-situ datasets during the simplest conditions of the quiescent corona near the solar minimum. This successful outcome/validation of the CODET model allowed a good qualitative density and temperature retrieval in the solar corona covering a large portion of time interval from solar cycles 23 and 24.

关键词： Solar Corona Electron Density Temperature

Survey of Compressions Observed in the Heliosheath with the Spacecraft Voyager

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Advances in Aerospace Science and Technology 2021年第1期6卷 43-66页

作者： Danie Benjamín Berdichevsky ifir/conicet-unr Esmeralda y 27 de Febrero Rosario Santa Fe RA TRIDENT-BERDICHEVSKY DANIEL B. Partnership Greenbelt MD USA

Examples of changes in the magnitude of the B-field after the heliosphere termination shock (TS) with both Voyager spacecraft (SC) are presented. The work focuses on similarities and differences in the observations at their in-situ measurements along divergent paths. The presented results were collected where the accuracy of the magnetometer is the highest. These locations are those wherein, four to seven times during the year, the SC performs about 330 minutes of slow rotations identified in the SC language as MAGROLs. They are next reviewed, with the understanding that after the TS, at MAGROLs, the solar wind (SW) flows appear to be mostly sub-magnetosonic and compressional in this region, region named helio-sheath (HS). This is a preliminary survey that uses 48 sec B-field averages. The time-intervals in this work fill gaps in the currently available studies for longer time intervals. The present study reinforces the view that in the HS after the TS the SW is most likely strongly compressional. Further we discuss the fact that observed fluctuation intensity-modes of the B-field in our time-ranges appear to be much more pronounced at the Voyager 2 path than at the Voyager 1 path.

关键词： Magnetic Field Measurement Techniques Solar Heliosphere’s Heliosheath MHD

Alternative Derivation of the Mean-Field Equations for Composite Fermions

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Journal of Modern Physics 2015年第12期6卷 1737-1742页

作者： Edmundo C. Manavella Carlos E. Repetto Instituto de Física Rosario (conicet-unr) Rosario Argentina Facultad de Ciencias Exactas Ingeniería y Agrimensura (UNR) Rosario Argentina

The Hamiltonian describing a composite fermion system is usually presented in a phenomenological way. By using a classical nonrelativistic U(1) × U(1) gauge field model for the electromagnetic interaction of electrons, we show how to obtain the mean-field Hamiltonian describing composite fermions in 2 + 1 dimensions. In order to achieve this goal, the Dirac Hamiltonian formalism for constrained systems is used. Furthermore, we compare these results with the ones corresponding to the inclusion of a topological mass term for the electromagnetic field in the Lagrangian.

关键词： Quantum Field Theory Field Theories in Dimensions Other than Four Chern-Simons Gauge Theory Lagrangian and Hamiltonian Formalisms

Changes in leaflet shape and seeds per pod modify crop growth parameters, canopy light environment, and yield components in soybean

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The Crop Journal 2020年第2期8卷 351-364页

作者： Julieta S.Bianchi Alvaro Quijano Carlos O.Gosparini Laboratorio de Fisiología Vegetal Facultad de Ciencias AgrariasUniversidad Nacional de Rosario(UNR)Campo Experimental J.VillarinoP.O.Box 142125 ZavallaSanta FeArgentina Instituto de Investigaciones en Ciencias Agrarias de Rosario(IICAR) Consejo Nacional de Investigaciones Científicas y Técnicas(CONICET)–UNRCampo Experimental J.VillarinoP.O.Box 142125 ZavallaSanta FeArgentina Consejo de Investigaciones de la unr(CIunr) Campo Experimental J.VillarinoP.O.Box 142125 ZavallaSanta FeArgentina

Seed number(SN)is the component most strongly associated with yield in *** depends on pod number(PN)and seeds per pod(SPP).Whereas SPP is a relatively stable component,PN is strongly influenced by environmental and management ***,the environmental cues involved in PN regulation are not completely *** influence of increasing SPP on other yield components is *** trials were conducted in two growing seasons using two pairs of lanceolate(L)and ovate(O)nearisogenic lines,sown at low(LD)and high(HD)plant densities to evaluate the effect of leaflet shape on crop growth parameters,canopy red/far-red(R/FR)ratio,their relationships with pod initiation,PN,and yield;and the effect of increasing SPP on PN,SN,and yield.L canopies showed a higher number of pods initiated(PI)than O canopies owing to the increase of PI on *** association between PI and crop growth rate during the pod set period was *** was negatively associated with leaf area index(LAI)and light *** contrast,a positive association between PI and canopy R/FR ratio was *** latter association was sustained irrespective of whether the LAI was below or above its critical value,providing experimental evidence that R/FR ratio is positively associated with pod initiation in soybean *** increase in SPP produced a direct and steady increase in SN regardless of PN and plant density.A yield increase was observed for the L-LD treatment,which combined the increased SPP of L lines with the highest PN of L-LD *** results have implications for crop management and breeding strategies aimed at increasing the yield potential of soybean.

关键词： soybean breeding shape

New approaches to identification and characterization of tioconazole in raw material and in pharmaceutical dosage forms

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Journal of Pharmaceutical Analysis 2019年第1期9卷 40-48页

作者： Natalia L.Calvo Vera A.Alvarez María C.Lamas Darío Leonardi Instituto de Química Rosario (IQUIR CONICET-UNR) área Análisis de Medicamentos Facultad de Ciencias Bioquímicas y Farmacéuticas Universidad Nacional de Rosario Grupo de Materiales Compuestos Termoplásticos (CoMP) Instituto de Investigaciones de Cienciay Tecnología de Materiales (INTEMA CONICET-UNMdP) área Técnica Farmacéutica Facultad de Ciencias Bioquímicas y Farmacéuticas Universidad Nacional de Rosario

Tioconazole(TCZ), a broad-spectrum antifungal agent, has significant activity against Candida albicans and other Candida species, and therefore, it is indicated for the topical treatment of superficial *** main goal of this work is to report an exhaustive identification and characterization procedure to improve and facilitate the online quality control and continuous process monitoring of TCZ in bulk material and loaded in two different dosage forms: ovules and nail lacquer. The methodologies were based on thermal(differential scanning calorimetry(DSC), melting point, and thermogravimetry(TG)),spectroscopic(ultraviolet(UV), Raman, near infrared(NIR), infrared spectroscopy coupled to attenuated total reflectance(FTIR-ATR), and nuclear magnetic resonance(NMR)), microscopic and X-ray diffraction(XRD). The TCZ bulk powder showed a high crystallinity, as observed by XRD, with a particles size distribution(3–95 mm) resolved by microscopic measurements. TCZ melting point(82.8 °C) and a degradation peak centered at 297.8 °C were obtained by DSC and DTG, respectively. An unambiguous structure elucidation of TCZ was obtained by mono-and two-dimensional1 H and13 C NMR spectral data analysis. The FTIR-ATR, Raman and NIR spectra of both the raw material and the commercial products were analyzed and their characteristic bands were tabulated. The best methods for TCZ identification in ovules were DSC, TG, XRD, NIR and Raman, while NIR and FTIR-ATR were the most appropriate techniques to analyze it in the nail lacquer. DSC, TG, DRX, Raman, FTIR-ATR and NIR spectroscopy are effective techniques to be used in online process analysis, because they do not require sample preparation, and they are considerably sensitive to analyze complex samples.

关键词： Tioconazole Identification Characterization Pharmaceutical dosage forms Spectroscopic methods

Electric memory effects in styrene-butadiene rubber, containing electric inclusions of highly aromatic oil

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Journal of Advanced Dielectrics 2018年第3期8卷 44-57页

作者： Ricardo Raúl Mocellini Federico Guillermo Bonifacich Fernando Daniel Lambri Mariel Antonella Lambri Griselda Irene Zelada Osvaldo Agustín Lambri conicet-unr Laboratorio de MaterialesEscuela de Ingeniería Electrica Centro de Tecnología e Investigacion Electrica Facultad de Ciencias ExactasIngeniería y Agrimensura Avda.Pellegrini 250Rosario 2000Argentina

It was determined that samples of styrene-butadiene rubber(SBR),containing highly aromatic oil,exhibit memory effects giving rise to dynamic elastic modulus,damping and internal stresses degree which can be tailored depending on the applied electric field *** capability and stability of the interaction process between aligned neighbor dipoles for exhibiting a memory effect,once the aligning electric field was removed are *** is determined that depending on the spatial arrangement and the amount of electric charge of the dipoles,this interaction is able to promote a memory effect which keeps the alignment between *** electrostatic interaction plays the role of a counteracting effect for keeping the alignment,which was called *** results from the developed model were applied successfully to SBR composite samples for explaining the memory effects recorded from dynamic mechanical analysis(DMA)measurements under electric *** addition,the model of the electric inclusion based on the inclusion theory for continuous media,was applied to determine the degree of internal stresses in the dielectric composite material due to the external applied electric *** addition,from the coupling between the model developed here and simple issues related to the mechanical properties of composite materials,a procedure for determining the maximum possible gap between the electric dipoles in composite dielectric materials is also shown.

关键词： Modeling memory effect dynamic mechanical analysis electric interaction polymer matrix composite with electric inclusions

HYBRID SIMULATION IN SUPPORT OF LABORATORY ASTROPHYSICS EXPERIMENTS AT unr

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HYBRID SIMULATION IN SUPPORT OF LABORATORY ASTROPHYSICS EXPE...

On the Relativistic Stars

2004无线电科学国际会议

作者： V.I. Sotnikov unr Department of Physics Reno NV 89557 USA

Laboratory astrophysics experiments are of great interest for space and astrophysical plasmas. One approach is based on the idea of combining strong magnetic field (up to 100 Tesla) created during a

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Journal of Modern Physics 2012年第4期3卷 340-344页

作者： Silvia Morales Roberto Aquilano nstituto de Física Rosario (conicet-unr) Bv. de Febrero 210 bis Rosario Argentina

Announcement from Editorial Board The following article has been retracted due to plagiarism. This paper published in Vol.3 No.4, April 2012, has been removed from this site. Title: On the Relativistic Stars Author: Silvia Morales, Roberto Aquilano It has been brought to our attention that this paper appears exactly as it was published in Astroparticle Physics, vol. 32, 2009, 153. ('On the nature of relativistic stars' by Silvia Morales, Alejandra Zorzi, Roberto Aquilano) Consequently, this paper has been retracted by Journal of Modern Physics. ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ?JMP Editorial Board ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ?April 30,

关键词： Compact Stars Oscillations General Relativity Strange Matter

Synthesis, Structural Study and Spectroscopic Characterization of a Quinolin-8-Yloxy Derivative with Potential Biological Properties

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Open Journal of Synthesis Theory and Applications 2013年第1期2卷 8-32页

作者： Elida Romano María V. Castillo Jorgelina L. Pergomet Juan Zinczuk Silvia A. Brandán Chemistry Rosario Institute (conicet-unr) Faculty of Biochemistry and Pharmacists Sciences Rosario R. Argentina Faculty of Biochemistry Chemistry and Pharmacy of the National University of Tucumán Tucumán R. Argentina

We have prepared the (5-chloro-quinolin-8-yloxy) acetic acid and characterized it by using infrared, Raman and multi-dimensional nuclear magnetic resonance spectroscopies. The density functional theory (DFT) together with the 6-31G* and 6-311++G** basis sets were used to study its structure and vibrational properties. Three stable conformations of the compound were theoretically determined in gas phase and probably these conformations are present in the solid phase. The harmonic vibrational wavenumbers for the optimized geometries were calculated at the same theory levels. For a complete assignment of the observed bands in the vibrational spectra, the DFT calculations were combined with Pulay’s scaled quantum mechanical force field (SQMFF) methodology in order to fit the theoretical wavenumber values to the experimental ones. Besides, the force constants of the three conformers of (5-chloro-quinolin-8-yloxy) acetic acid were calculated and compared with those obtained by us for the 2-(quinolin-8-yloxy) acetic acid. In addition, the characteristics of the electronic delocalization of those structures were performed by using natural bond orbital (NBO), while the corresponding topological properties of electronic charge density are analysed by employing Bader’s atoms in molecules theory (AIM).

关键词： (5-Chloro-Quinolin-8-Yloxy) Acetic Acid Vibrational Spectra Molecular Structure Force Field DFT Calculations