Determination of different solutions in active chlorine sodium hypochlorite

El hipoclorito de sodio, en sus diferentes concentraciones, constituye la primera elección como sustancia irrigadora de los conductos radiculares. Es por esto la importancia de mantener las concentraciones para obtener una buena desinfección. El objetivo de este estudio fue determinar la cantidad de cloro activo presente en diferentes marcas comerciales de hipoclorito de sodio. Se seleccionaron diferentes marcas comerciales de hipoclorito de sodio, la evaluación del cloro activo se realizó mediante el método titulación de óxido-reducción. El 100% de las marcas comerciales no presentó la cantidad de cloro activo declarada por el fabricante (46,6 +/15,68),en todas las muestras analizadas en laboratorio los resultados obtenidos fueron menores (39,57 +/12,14) a los especificados por el fabricante con una diferencia estadísticamente significativa (p < 0.01) Esta investigación permite evaluar un aspecto relevante dentro del campo de la terapia endodóntica, mejorando los estándares de calidad de las prácticas clínicas.Sodium hypochlorite, at different concentrations, is the first choice as substance irrigating root canals. That is why the importance of maintaining concentrations to obtain good disinfection The aim of this study was to determine the amount of active chlorine in different brands of sodium hypochlorite. different brands of sodium hypochlorite were selected, evaluation of active chlorine was performed by redox method. The 100% trademarks not presented the amount of active chlorine declared by the manufacturer (46.6 + / 15.68) in all samples analyzed in the laboratory results obtained were lower (39.57 + / 12.14) to those specified by the manufacturer with a statistically significant difference (p <0.01). This research evaluates a relevant aspect within the field of endodontic therapy, improving the quality standards of clinical practice.Fil: Peña, Graciela. Universidad Nacional de Cuyo. Facultad de OdontologíaFil: Caram, Julio. Universidad Nacional de Cuyo. Facultad de Odontologí

Ph verification of different solutions sodium hypochlorite

La solución de hipoclorito de sodio, en sus diferentes concentraciones, constituye la primera elección mundial como sustancia irrigadora de los conductos radiculares. Es por esto la importancia de mantener el pH de la solución para obtener una buena desinfección, y con eso aumentar las posibilidades de alcanzar el éxito endodóntico. El objetivo de este estudio es verificar el pH en diferentes marcas comerciales de hipoclorito de sodio. Se seleccionaron diversas marcas comerciales de diferentes concentraciones de hipoclorito de sodio encontradas a la venta. Todas las soluciones analizadas se encontraban en envases cerrados Para el análisis del potencial hidrogénico (pH) se utilizó un medidor potenciométrico de pH. De acuerdo al análisis de los datos obtenidos, las soluciones de hipoclorito de sodio presentaron un pH alcalino. Se sugiere un mayor control de calidad de las soluciones de hipoclorito de sodio encontradas a la venta y utilizadas como irrigantes durante la terapia endodóntica.The solution of sodium hypochlorite at different concentrations, is the first global election as substance irrigating root canals. That is why the importance of maintaining the pH of the solution to obtain a good disinfection, and thereby increase the chances of reaching the endodontic success. Therefore the aim of this study is to check the pH in different brands of sodium hypochlorite. Materials and Methods: For this study several shopping and different concentrations of sodium hypochlorite found for sale brands were selected. All solutions were analyzed in closed containers Hidrogénico for analyzing potential (pH) a potentiometric pH meter was used. According to the analysis of the data obtained, the sodium hypochlorite solutions showed an alkaline pH. Greater control of quality of sodium hypochlorite solutions found for sale and used as irrigating during endodontic therapy is suggested.Fil: Barrera Borio, Maira Sol. Universidad Nacional de Cuyo. Facultad de OdontologíaFil: Caram, Julio. Universidad Nacional de Cuyo. Facultad de OdontologíaFil: Peña, Graciela Roxana. Universidad Nacional de Cuyo. Facultad de Odontologí

A Chirality-Based Quantum Leap

There is increasing interest in the study of chiral degrees of freedom occurring in matter and in electromagnetic fields. Opportunities in quantum sciences will likely exploit two main areas that are the focus of this Review: (1) recent observations of the chiral-induced spin selectivity (CISS) effect in chiral molecules and engineered nanomaterials and (2) rapidly evolving nanophotonic strategies designed to amplify chiral light-matter interactions. On the one hand, the CISS effect underpins the observation that charge transport through nanoscopic chiral structures favors a particular electronic spin orientation, resulting in large room-temperature spin polarizations. Observations of the CISS effect suggest opportunities for spin control and for the design and fabrication of room-temperature quantum devices from the bottom up, with atomic-scale precision and molecular modularity. On the other hand, chiral-optical effects that depend on both spin- and orbital-angular momentum of photons could offer key advantages in all-optical and quantum information technologies. In particular, amplification of these chiral light-matter interactions using rationally designed plasmonic and dielectric nanomaterials provide approaches to manipulate light intensity, polarization, and phase in confined nanoscale geometries. Any technology that relies on optimal charge transport, or optical control and readout, including quantum devices for logic, sensing, and storage, may benefit from chiral quantum properties. These properties can be theoretically and experimentally investigated from a quantum information perspective, which has not yet been fully developed. There are uncharted implications for the quantum sciences once chiral couplings can be engineered to control the storage, transduction, and manipulation of quantum information. This forward-looking Review provides a survey of the experimental and theoretical fundamentals of chiral-influenced quantum effects and presents a vision for their possible future roles in enabling room-temperature quantum technologies.ISSN:1936-0851ISSN:1936-086

Outcomes from elective colorectal cancer surgery during the SARS-CoV-2 pandemic

This study aimed to describe the change in surgical practice and the impact of SARS-CoV-2 on mortality after surgical resection of colorectal cancer during the initial phases of the SARS-CoV-2 pandemic

Reactions of 1,2.,5-thiadiazole 1,1-dioxide derivatives with nitrogen nucleophiles. Part IV. Addition of alpha-diamines

alpha-diamines, such as ethylendiamine and o-phenylendiamine, add to 3,4-aryl-disubstituted 1,2,5-thiadiazole 1,1-dioxides to give dihydropyrazines or quinoxalines, respectively and sulfamide. The new compound acenaphtho [5,6-b]-2,3-dihydropyrazine was synthesized and characterized. The addition of ethylendiamine to 3,4-diphenyl-1,2,5-thiadiazoline 1,1-dioxide gives 3,4-disubstituted thiadiazoildine 1,1-dioxide, dihydropyrazines, or pyrazines, depending on the reaction condition used. The reactions were followed by cyclic voltammetry and NMR spectroscopy which, in some cases, allowed the detection of the thiadiazolidine intermediate. Copyright (c) 2008 John Wiley & Sons, Ltd.Consejo Nacional de Investigaciones Científicas y Técnicas de Argentina (CONICET)Consejo Nacional cle Investigaciones Cientificas y Tecnicas (CONICET)Comision de Investigaciones Cientificas de la Provincia cle Buenos Aires (CIC Pcia. Bs.As.), ArgentinaComisión de Investigaciones Científicas Provincia de Buenos Aires (CIC) - ArgentinaUniversidad Nacional de La Plata (UNLP)Universidad Nacional de La Plata (UNLP

Crystallographic study and molecular orbital calculations of thiadiazole derivatives. Part 3: 3,4-diphenyl-1,2,5-thiadiazoline 1,1-dioxide, 3,4-diphenyl-1,2,5-thiadiazolidine 1,1-dioxide and 4-ethoxy-5-methyl-3,4-diphenyl-1,2,5-thiadiazoline 1,1-dioxide

Single-crystal X-ray diffraction studies are reported for 3,4-diphenyl-1,2,5-thiadiazoline 1,1-dioxide (I), 3,4-diphenyl-1,2,5-thiadiazolidine 1,1-dioxide(II) and 4-ethoxy-5-methyl-3,4-diphenyl-1,2,5-thiadiazoline 1,1-dioxide (III). Ab initio MO calculations on the electronic structure, conformation and reactivity of these compounds are also reported and compared with the X-ray results. A charge sensitivity analysis is performed on the results applying concepts derived from density functional theory, obtaining several sensitivity coefficients such as the molecular energy, net atomic charges, global and local hardness, global and local softness and Fukui functions. With these results and the analysis of the dipole moment and the total electron density and electrostatic potential maps, several conclusions have been inferred about the preferred sites of chemical reaction of the studied compounds. © 2001 Elsevier Science B.V. All rights reserved.Fil: Castellano, E. E.. Universidade de Sao Paulo; BrasilFil: Piro, Oscar Enrique. Facultad de Ciencias Exactas, Universidad Nacional de la Plata; ArgentinaFil: Caram, José Alberto. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - La Plata. Instituto de Investigaciones Fisicoquímicas Teóricas y Aplicadas. Universidad Nacional de La Plata. Facultad de Ciencias Exactas. Instituto de Investigaciones Fisicoquímicas Teóricas y Aplicadas; ArgentinaFil: Mirifico, Maria Virginia. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - La Plata. Instituto de Investigaciones Fisicoquímicas Teóricas y Aplicadas. Universidad Nacional de La Plata. Facultad de Ciencias Exactas. Instituto de Investigaciones Fisicoquímicas Teóricas y Aplicadas; ArgentinaFil: Aimone, S. L.. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - La Plata. Instituto de Investigaciones Fisicoquímicas Teóricas y Aplicadas. Universidad Nacional de La Plata. Facultad de Ciencias Exactas. Instituto de Investigaciones Fisicoquímicas Teóricas y Aplicadas; ArgentinaFil: Vasini, Enrique Julio. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - La Plata. Instituto de Investigaciones Fisicoquímicas Teóricas y Aplicadas. Universidad Nacional de La Plata. Facultad de Ciencias Exactas. Instituto de Investigaciones Fisicoquímicas Teóricas y Aplicadas; ArgentinaFil: Márquez Lucero, A.. Centro de Investigacion En Materiales Avanzados; MéxicoFil: Glossman Mitnik, D.. Centro de Investigacion En Materiales Avanzados; Méxic

Comparison between two ovulation-inducing drugs in mares

ABSTRACT. Silva P.C.A., Oliveira J.P., Sá M.A.F., Paiva S.O., Caram D.F., Junqueira R.G.C. & Jacob J.C.F. [Comparison between two ovulation-inducing drugs in mares.] Comparação entre dois agentes indutores da ovulação em éguas. Revista Brasileira de Medicina Veterinária, 38(Supl.2):45-48, 2016. Departamento de Reprodução e Avaliação Animal, Instituto de Zootecnia, Universidade Federal Rural do Rio de Janeiro, BR-465, Km 7, Seropédica, RJ 23890-000, Brasil. E-mail: [email protected] Hormonal control of the ovulation is an effective tool to improve reproductive performance and reduce costs in equine breeding programs. The aim of this study was to compare the efficiency of lower doses of hCG and Deslorelina than doses traditionally used, evaluating the follicular parameters and time between induction and ovulation. Induction of ovulation was performed according to the groups, 1000 IU of hCG (G1), 0.75mg of Deslorelin (G2), and 1.0ml of saline solution (G3). Twenty-four hours after administration, ovaries were evaluated by ultrasound every six hours until detection of ovulation.  The percentage of ovulation within 36 hours was 34.4%, 13.3% and 8.7%, and up to 42 hours was 96.9%, 70% and 17.4% for G1, G2 and G3, respectively, showing a significant increase (p ˂ 0.0001) in G1 compared to other groups. In G2 there was a significant increase (p ˂ 0.0001) of ovulation after 42 hours from the induction, and G3 after 48 hours. Until 48 hours the percentage of induction of ovulation was 96.8% (31/32) 90% (27/30) and 30.4% (7/23), respectively, for G1, G2 and G3. Thus, the lower doses of ovulation-inducing drugs were effective in inducing ovulation within 48 hours, however hCG was faster than deslorelin, which might reduce costs and help the reproduction management

Influence of Ethanolic Plant Extracts on Morphology and Size Distribution of Sol-Gel Prepared TiO2 Nanoparticles

The influence of ethanolic extracts of three common plants (Equisetum arvense, Syzygium aromaticum and Camellia sinensis) on the morphology and size distribution of TiO2 nanoparticles prepared using the sol-gel method is presented. The phytochemicals extracted from the plants acted as surfactants, modifying the growth mechanism and stabilizing high-quality small, quasi-spherical, non-aggregated TiO2 nanoparticles with sizes in the range from 20–50 nm. The most satisfactory result was achieved using extracts of E. arvense. The structural, morphological, and optical properties of TiO2 nanoparticles prepared using E. arvense ethanolic extracts are discussed. After thermal treatment at 550 °C, the TiO2 nanoparticles were present only in the anatase crystalline phase, with a bandgap of 3.27 eV, as confirmed by X-ray diffraction and UV-vis analyses, respectively. These small morphologically homogeneous TiO2 nanoparticles stabilized by low-cost, abundant and eco-friendly capping agents may be useful as components in photovoltaic cells, pharmaceutical and cosmetic products, as well as for photocatalytic uses.Fil: Rodríguez Jiménez, Rafael Aurelio. Benemérita Universidad Autónoma de Puebla; MéxicoFil: Panecatl Bernal, Yesmin. Universidad Interserrana del Estado de Puebla-Ahuacatlán; MéxicoFil: Carrillo López, Jesús. Benemérita Universidad Autónoma de Puebla; MéxicoFil: Méndez Rojas, Miguel Ángel. Universidad de las Américas Puebla; MéxicoFil: Romero López, Anabel. Benemérita Universidad Autónoma de Puebla; MéxicoFil: Pacio Castillo, Mauricio. Benemérita Universidad Autónoma de Puebla; MéxicoFil: Vivaldo, Israel. Benemérita Universidad Autónoma de Puebla; MéxicoFil: Morales Sánchez, Alfredo. Instituto Nacional de Astrofísica; MéxicoFil: Arce, Roberto Delio. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Santa Fe. Instituto de Física del Litoral. Universidad Nacional del Litoral. Instituto de Física del Litoral; ArgentinaFil: Caram, Jorge Pablo. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Santa Fe. Instituto de Física del Litoral. Universidad Nacional del Litoral. Instituto de Física del Litoral; ArgentinaFil: Villanueva-Cab, Julio. Benemérita Universidad Autónoma de Puebla; MéxicoFil: Alvarado, Joaquín. Benemérita Universidad Autónoma de Puebla; Méxic

A Chirality-Based Quantum Leap

Chiral degrees of freedom occur in matter and in electromagnetic fields and constitute an area of research that is experiencing renewed interest driven by recent observations of the chiral-induced spin selectivity (CISS) effect in chiral molecules and engineered nanomaterials. The CISS effect underpins the fact that charge transport through nanoscopic chiral structures favors a particular electronic spin orientation, resulting in large room-temperature spin polarizations. Observations of the CISS effect suggest opportunities for spin control and for the design and fabrication of room-temperature quantum devices from the bottom up, with atomic-scale precision. Any technology that relies on optimal charge transport, including quantum devices for logic, sensing, and storage, may benefit from chiral quantum properties. These properties can be theoretically and experimentally investigated from a quantum information perspective, which is presently lacking. There are uncharted implications for the quantum sciences once chiral couplings can be engineered to control the storage, transduction, and manipulation of quantum information. This forward-looking perspective provides a survey of the experimental and theoretical fundamentals of chiral-influenced quantum effects, and presents a vision for their future roles in enabling room-temperature quantum technologies