Laboratory rotational spectroscopy and astronomical search of ethynyl substituted naphthalene

The recent interstellar detection of cyanonaphthalenes bring interest in related aromatic molecular species that could be present in similar astronomical environments. In this context, ethynyl derivatives of naphthalene are promising candidates to be observed in the Taurus Molecular Cloud (TMC-1), where cyanonaphthalenes together with cyano- and ethynyl- derivatives of cyclopentadiene and benzene have been detected. To enable the interstellar searches for ethynyl derivatives of naphthalene, their pure rotational spectra need to be investigated in the laboratory. We have observed for the first time the rotational spectra of 1- and 2-ethynylnaphthalene species using a broadband Fourier-transform microwave spectrometer operating in the 2-8 GHz frequency region. Accurate spectroscopic parameters are derived from the analysis of the experimental spectra, allowing for reliable predictions for astronomical searches. Our searches in TMC-1 for both isomers provide upper limits for the abundances of these species.Comment: Accepted 2022 December 13 in MNRA

Renal function panel: an information system for results tests management at the Huila department

Globally, kidney disease affects about 10% of the population, and in Colombia about four million potential kidney patients. At the present, the information available for prevention and follow-up of patient treatment is insufficient. Consequently, if there is not an adequate prevention, it increases that the renal problems progress to advanced states, which implies higher health costs of the treatments. Therefore, this paper presents the design and implementation of an information system to optimize the process of performing and managing the results of renal profile tests to patients in the hospitals of the Huila department, is based on the HL7-FHIR standard (Health Level 7 - Fast Healthcare Interoperability Resources). As a result, a system was designed and implemented using technologies such as Java, MySQL, Java, CSS3, HTML5, among others. Finally, we concluded that the proposed information system can minimize execution times and facilitate the management of the metabolic panel examination by the team of medical assistants when a patient's results have been performed

CRIEGEE INTERMEDIATES REACTIONS WITH FORMIC ACID PROBED BY FTMW SPECTROSCOPY

Gas-phase ozonolysis is a major degradation mechanism of alkenes in the Earth's atmosphere and forms Criegee intermediates (CIs), carbonyl oxides, as reactive intermediates. The chemistry of CIs plays a central role in controlling the budgets of many tropospheric species including OH, organic acids, and secondary organic aerosols (SOA). The reaction of CIs with organic acids can provide a pathway in which alkenes are converted to low-volatility compounds and thus contribute to the formation of SOA. Here we report spectroscopic investigation, through pure rotational spectroscopy, of the reaction between the simplest Criegee intermediate, CH$_{2}$OO, and the simplest organic acid, the formic acid, HCOOH. In this experiment, CH$_{2}$OO molecules have been generated in the discharged plasma of a CH$_{2}$I$_{2}$/O$_{2}$ mixture, which containing a small amount of HCOOH enough to react with CH$_{2}$OO. The resulting products (including CH$_{2}$OO) were characterized by Fourier-transform microwave (FTMW) spectroscopy. Rotational transitions in the 6-40 GHz frequency range were observed by FTMW spectroscopy together with MW-mmW and MW-MW double-resonance techniques. Preliminary results for the reaction of both conformers of the methyl-substituted Criegee intermediate, CH$_{3}$CHOO, with formic acid are also presented

THE MILLIMETERWAVE SPECTRUM OF SUCCINONITRILE

Only two dinitriles, the protonated cyanogen NCCNH$^{+}$ and one isocyanonitrile, NCNC have been detected in the interstellar medium (ISM) among about 200 other compounds, despite nitriles constitute almost 20\% of the molecules observed in the interstellar medium. The lack of detections of dinitriles may be explained by the lack of accurate spectroscopic data on their rotational spectra since most of them do not present permanent dipole moment. Succinonitrile, NCCH$_{2}$CH$_{2}$CN is one of the simplest dinitriles and it could be a candidate molecule to be observed in the ISM. The rotational spectrum for succinonitrile has been previously observed in the 2-78 GHz frequency region by Jahn \textit{et al}.,\footnote{M.~K.~Jahn, J.-U.~Grabow, P.~D.~Godfrey and D.~McNaughton, \textit{Phys.Chem.Chem.Phys.}, \textbf{2014}, \textit{16}, 2100.} but these measurements were limited to the ground state. In this talk we report the study of succinonitrile and its low lying excited vibrational states using a newly built broadband Fourier transform millimeter wave spectrometer \footnote{J.~Cernicharo \textit{~et~al.,} \textit{A\&A,} \textbf{2019}.} equipped with Q-band (31.5-50 GHz) and W-band (72-116 GHz) receivers, similar to those used in the radio-telescopes. The spectrometer is well suited for high resolution emission spectroscopy of molecules of astrophysical importance

Insoluble soybean polysaccharides: Obtaining and evaluation of their O/W emulsifying properties

The aims of this work were to obtain different samples of insoluble soybean polysaccharides (ISPS) from defatted soy flour and to study their potential application as O/W emulsifier. In this regard, the insoluble residue (okara) resulting from an aqueous extraction (60 °C, pH 9.0), was submitted to an acidic extraction (pH 3.5, 120 °C) without or with a pretreatment (high pressure homogenization or sonication treatment). The insoluble residues of these extractions were dried (oven, 70 °C or vacuum post-treatment with 2-propanol, 40 °C) yielding different ISPS samples. Aqueous dispersions of ISPS samples (1?2% w/w, pH 3 and 7), were used to prepare coarse and fine O/W emulsions. Emulsion stability against creaming and coalescence processes, and the rheological behavior were analyzed. ISPS samples obtained by okara pretreatment and vacuum dried post-treatment with 2-propanol allow to produces emulsions with high values of flocculation degree, increasing the stability of the particle size, and allowing the formation of stronger gel-like emulsions. These pretreatments expose internal sites of the polysaccharide and protein structures, increasing their superficial hydrophobicity and, therefore, allow a strong absorption of the macromolecules at the oil-water interface and/or the formation of external layers, increasing the rigidity of the interfacial film and contributing to the formation of hydrated flocs, Also, these treatments could solubilize certain compounds in okara that would interfere negatively in the formation of the interfacial film. Particularly, sample obtained by high pressures homogenization of the okara presented the best emulsifying properties and it was not significantly affected by variations in the pH of the emulsion. The results of this research work demonstrate a high potential of application of the ISPS samples as O/W emulsifier, under acid and neutral conditions, increasing the added value of an important by-product of the soybean industry.Fil: Porfiri, María Cecilia. Consejo Nacional de Investigaciones Científicas y Técnicas; Argentina. Universidad Nacional de Quilmes. Departamento de Ciencia y Tecnología. Laboratorio de Investigación en Funcionalidad y Tecnología de Alimentos; ArgentinaFil: Vaccaro, J.. Universidad Nacional de Quilmes. Departamento de Ciencia y Tecnología. Laboratorio de Investigación en Funcionalidad y Tecnología de Alimentos; ArgentinaFil: Stortz, Carlos Arturo. Consejo Nacional de Investigaciones Científicas y Técnicas. Oficina de Coordinación Administrativa Ciudad Universitaria. Centro de Investigaciones en Hidratos de Carbono. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales. Centro de Investigaciones en Hidratos de Carbono; ArgentinaFil: Navarro, Diego Alberto. Consejo Nacional de Investigaciones Científicas y Técnicas. Oficina de Coordinación Administrativa Ciudad Universitaria. Centro de Investigaciones en Hidratos de Carbono. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales. Centro de Investigaciones en Hidratos de Carbono; ArgentinaFil: Wagner, Jorge Ricardo. Consejo Nacional de Investigaciones Científicas y Técnicas; Argentina. Universidad Nacional de Quilmes. Departamento de Ciencia y Tecnología. Laboratorio de Investigación en Funcionalidad y Tecnología de Alimentos; ArgentinaFil: Cabezas, Dario Marcelino. Consejo Nacional de Investigaciones Científicas y Técnicas; Argentina. Universidad Nacional de Quilmes. Departamento de Ciencia y Tecnología. Laboratorio de Investigación en Funcionalidad y Tecnología de Alimentos; Argentin

Contribution to Local Landscape Units definition in OTALEX II

OTALEX II is the Territorial and Environmental Observatory of Alentejo (Portugal) and Extremadura (Spain), co-financed by POCTEP, developed with the cross-border collaboration of several Portuguese and Spanish bodies. It is composed of a Spatial Data Infrastructure (SDI) created in 2007, SDI-OTALEX (www.ideotalex.eu), which is an exchange platform for geographic information and Webmapping services among project partners. The integration of environmental indicators such as landscape indicators, for the characterization and monitoring of the Alentejo Extremadura area is one of the most relevant components of the project. This paper reports the achievements in defining Local Landscape Units (LLU) for a pilot area of Central Alentejo – the Pardiela river basin. The methodological approach applied Geographic Information System tools to integrate soils, geomorphology and land cover. The land cover map applies the CORINE Land Cover Legend Level 5 to Central Alentejo at a scale of 1 : 10,000. This map contains variables related to vegetation, hydrology (streams and water bodies) and human settlements (buildings, equipment, roads). The validation of the results obtained for LLU with previously defined Landscape Units and potential vegetation mapping confirm the reliability and replicability of the present methodology for similar territories

Hipersuperficies de variedades semi-riemannianas.

Trabajo Fin de Máster. Máster en Física y Matemáticas. Curso académico 2022-2023.[ES]En esta memoria se aborda un problema geométrico de subvariedades semi-riemannianas: estudiamos las hipersuper- ficies de Einstein, es decir, aquellas donde el tensor de Ricci es proporcional a la métrica, y los solitones de Ricci en espacios ambiente de curvatura constante. Se revisan varios artículos y se trata también el caso semi-kähler. Por último, se dan resultados originales para solitones inmersos como hipersuperficies en formas espaciales.[EN]In this report, we address a geometric problem related to semi-Riemannian submanifolds. We study Einstein hypersurfaces, which are those where the Ricci tensor is proportional to the metric, as well as Ricci solitons in ambient spaces of constant.curvature. We review several articles and also consider the semi-Kähler case. Finally, we present original results for solitons inmersed as hypersurfaces in spatial forms

SPECTROSCOPIC CHARACTERIZATION OF THE REACTION PRODUCTS BETWEEN HCl AND THE SIMPLEST CRIEGEE INTERMEDIATE CH2OO

Carbonyl oxides (R$_{1}$R$_{2}$COO), also known as Criegee intermediates (CIs), react quickly with many trace atmospheric gases, including inorganic gases such as HCl, which are present in polluted urban atmospheres. A theoretical investigation of the reaction between the simplest CI, CH$_{2}$OO, with HCl suggests the formation of chloromethyl hydroperoxide (CMHP) through an insertion mechanism. To gain some insight, we have interrogated the reaction system containing CH$_{2}$OO and HCl through pure rotational spectroscopy. In our experiment, CH$_{2}$OO molecules have been generated in the discharged plasma of a CH$_{2}$I$_{2}$/O$_{2}$ mixture, which containg a small amount of HCl enough to react with CH$_{2}$OO. The resulting products (including CH$_{2}$OO) were characterized by Fourier-transform microwave (FTMW) spectroscopy. Rotational transitions in the 6-40 GHz frequency range were observed by FTMW spectroscopy together with FTMW-mmW and MW-MW double-resonance techniques. The observed species was identified with the help of quantum chemical calculations as the most stable conformer of CMHP. The non observation of other different reaction products together with the absence of spectral features of the complex between HCl and CH$_{2}$OO enable us to understand the pathway of the HCl+CH$_{2}$OO reaction

Existencia e multiplicidade de soluções para certos problemas eliticos semilineares

Orientador : Djairo Guedes de FigueiredoTese (doutorado) - Universidade Estadual de Campinas, Instituto de Matematica, Estatistica e Computação CientíficaResumo: Não informadoAbstract: Not informedDoutoradoDoutor em Ciência

PROBING THE CONFORMATIONAL BEHAVIOR OF THE C3 ALKYL-SUBSTITUTED CRIEGEE INTERMEDIATES BY FTMW SPECTROSCOPY

Carbonyl oxides (R$_{1}$R$_{2}$COO), often called Criegee intermediates (CIs), have been assumed as intermediates generated by the ozonolysis reaction of alkenes, and are thought to play important roles in atmospheric chemistry. After the first laboratory observation of the simplest CI, CH$_{2}$OO, their experimental characterization has been drastically progressing. Especially alkyl-substituted CIs have attracted much attention. Here we report rotational spectra of alkyl-substituted CIs with three carbon atoms in the substituent groups, named C$_{3}$ alkyl-substituted CIs. This group includes methyl-ethyl-ketone oxide or 2-butanone oxide (C$_{2}$H$_{5}$CCH$_{3}$OO) and its structural isomers n-butyraldehyde oxide (C$_{3}$H$_{7}$CHOO) and isobutyraldehyde oxide ((CH$_{3}$)$_{2}$CHCHOO). These molecules have been produced in the discharge plasma of diiodo-alkyl-derivative/O$_{2}$ gas mixtures, and characterized by Fourier-transform microwave spectroscopy. For the first of them, C$_{2}$H$_{5}$CCH$_{3}$OO, four different conformers were observed coexisting in the supersonic expansion. Spectra of the four species show small splittings due to the threefold methyl internal rotation which made possible to determine their respective barrier heights of the hindered methyl rotation. Preliminary results of the ongoing investigation of C$_{3}$H$_{7}$CHOO and (CH$_{3}$)$_{2}$CHCHOO molecules are also presented