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Abstract Introduction: In Mexico, cardiac rehabilitation (CR) as an interdisciplinary intervention with therapeutic impact in patients with heart disease is growing. There is the need to know actual conditions of CR in our country. Objectives: The objective of this National Registry is to follow-up those existing and new CR units in Mexico through the comparison between the two previous registries, RENAPREC-2009 and RENAPREC II-2015 studies. This is a descriptive study focused on diverse CR activities such as assistance training, and certification of health professionals, barriers, reference, population attended, interdisciplinarity, permanence over time, growth prospects, regulations, post-pandemic condition, integrative characteristics, and scientific research. Results: Data were collected from 45 CR centers in the 32 states, 75.5% are private practice units, 67% are new, 33% were part of RENAPREC II-2015, and 17 have continued since 2009. With a better distribution of CR units along the territory, the median reference of candidates for CR programs is 9% with a significant reduction into tiempo of enrollment to Phase II admission (19 ± 11 days). Regarding to previous registries, the coverance of Phases I, II, and III is 71%, 100%, and 93%, respectively; and a coverance increases in evaluation, risk stratification, and prescription, more comprehensive attendance and prevention strategies. Conclusions: CR in Mexico has grown in the past 7 years. Even there is still low reference and heterogeneity in specific processes, there are strengths such as interdisciplinarity, scientific professionalization of specialists, national diversification, and an official society that are consolidated over time.

https://doi.org/10.24875/acm.22000235

Economic indicators for cowpea cultivation under different irrigation depths
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Carvalho, Erika de O. T. de

; Costa, Deborah L. P.

; Luz, Denilson B. da

; Rua, Matheus L.

; Velame, Maria de L. A.

; Monteiro, Adrielle C.

; Vieira, Igor C. de O.

; Pinto, João V. de N.

; Fernandes, Gabriel S. T.

; Nunes, Hildo G. G. C.

; Souza, Paulo J. de O. P. de

; Santos, Marcos A. S. dos

Revista Brasileira de Engenharia Agrícola e Ambiental

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aug 2023, Volume 27 N. 8 Pages 618 - 624

Abstract: En Pt | Text: En Pt | PDF: En | PDF: Pt

ABSTRACT Cowpeas are of high socioeconomic importance in the North and Northeast regions of Brazil, whereby the search for alternatives that offer increased productivity with financial returns has become an important challenge. Thus, the objective of this study was to estimate and evaluate the economic indicators of cowpea production in 2015 and 2016 when applying drip irrigation to different depths. Irrigation treatments were based on crop evapotranspiration (ETc). The experiment was laid in a randomized complete blocks design with four treatments (0, 25, 50, and 100% ETc) and six replications. For economic analysis, the results were extrapolated to an area of one hectare. Productivity in 2015 was lower than that in 2016; however, in all treatments, it was always higher when plants were grown under adequate water supply. In both years, the total operating costs were higher under irrigation than under rainfed conditions. The 100% ETc treatment resulted in a greater number of cowpea bags (60 kg) produced and a higher gross revenue than the rainfed treatment by 17 bags ha-1, equivalent to 1,020 kg ha-1 (gross revenue US$ 711.48) and 16 bags ha-1, equivalent to 960 kg ha-1 (gross revenue US$ 867.12), in 2015 and 2016, respectively. Water deficit limited cowpea yield in both years but made cultivation economically unfeasible only in 2015.

RESUMO O feijão-caupi apresenta grande importância socioeconômica nas regiões Norte e Nordeste do Brasil, sendo que a busca por alternativas que ofereçam aumento de produtividade com retorno financeiro tem se tornado um importante desafio. Assim, o objetivo deste trabalho foi estimar e avaliar os indicadores econômicos da produção de feijão-caupi nos anos de 2015 e 2016 quando da aplicação de irrigação por gotejamento em diferentes lâminas. Os tratamentos de irrigação foram baseados na evapotranspiração da cultura (ETc). O experimento foi instalado em blocos ao acaso com quatro tratamentos (0, 25, 50 e 100% da ETc) e seis repetições. Para análise econômica, os resultados foram extrapolados para uma área de um hectare. A produtividade em 2015 foi inferior à de 2016; porém, em todos os tratamentos, a produtividade foi sempre maior quando as plantas foram cultivadas sob irrigação adequada. Em ambos os anos, os custos operacionais totais foram maiores sob irrigação do que sob condições de sequeiro. O tratamento 100% ETc resultou em maior número de sacas de feijão-caupi (60 kg) produzidas e receita bruta superior ao tratamento de sequeiro em 17 sacas ha-1, equivalente a 1.020 kg ha-1 (receita bruta US$ 711,48) e 16 sacas ha-1, equivalente a 960 kg ha-1 (receita bruta US$ 867,12), em 2015 e 2016, respectivamente. A deficiência hídrica limitou a produtividade do feijão-caupi nos dois anos, mas inviabilizou economicamente o cultivo apenas em 2015.

https://doi.org/10.1590/1807-1929/agriambi.v27n8p618-624

Silver Tungstate Obtained via Successive Seed Crystal Growth: Structural, Morphological, Optical, and Photocatalytic Properties
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Santos, Germano P.

; Silva, Francisco C. M.

; Cruz-Filho, João F.

; Luz, Roberto A. S.

; Luz Jr., Geraldo E.

Journal of the Brazilian Chemical Society

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jul 2023, Volume 34 N. 7 Pages 992 - 1002

Abstract: En | Text: En | PDF: En

Synthesis routes and parameters such as synthesis time, precursor molar ratio, pH, and temperature are critical for generating oxides of various sizes and morphological aspects. However, there is no information on how to prepare silver tungstate (Ag2WO4) crystals of different shapes and sizes under laboratory conditions and without using sulfating agents. In this study, we attempted to fill this gap by preparing α-Ag2WO4 crystals of various sizes and morphologies using the coprecipitation method in a 3 h interval at room temperature and without using sulfating agents. The powder X-ray diffraction analysis confirmed that all crystals had an orthorhombic structure, whereas Fourier-transform infrared spectroscopy revealed the degree of structural disorder in the bonds between the atoms in the materials. Scanning electron microscopy revealed that the α-Ag2WO4 crystals had different sizes (5.37-26.83 µm) and morphologies (tetragonal prism, rod, and cypress leave-like rod), whereas ultraviolet-visible diffuse reflectance spectroscopy analysis indicated the optical band gap energy (2.92-3.05 eV), calculated using the method proposed by Kubelka and Munk. Catalytic tests revealed that the synthesized samples with the smallest crystals (AW1) and a tetragonal prism morphology degraded dye more efficiently (apparent rate constant (k) = 5.86 × 10-3 min-1) than other samples.

https://doi.org/10.21577/0103-5053.20230013

Phase transformations and properties evolution of Ca(OH)2 containing geopolymers as a function of temperature
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Bezerra, B. P.

; Silva, H. R. M.

; Morelli, M. R.

; Luz, A. P.

Cerâmica

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jul 2023, Volume 69 N. 391 Pages 189 - 194

Abstract: En | Text: En | PDF: En

Abstract The composition-processing-structure-properties relationship of Na2O-Al2O3-SiO2-based geopolymers containing calcium sources is critical for the design of enhanced ceramic binders. This work evaluated the addition of 1-6 wt% of calcium hydroxide (CH) to a metakaolin-based geopolymer (prepared with NaOH 12 M and colloidal silica suspension) and how it affected the performance of the prepared samples after thermal treatments up to 1000 °C. The setting time, mechanical strength, porosity, density, permanent linear change, and phase and bond type evolution of the specimens with temperature were analyzed. The incorporation of 3 or 6 wt% of CH into the designed composition led to a fast hardening of the mixtures (1.7 h), resulting in geopolymers with high green mechanical strength (18.9 to 23.9 MPa). Nepheline and albite generation in the samples containing 6 wt% of CH resulted in a ceramic with improved cold crushing strength (45.2 MPa) and lower linear shrinkage (-10.5%) when compared to the calcium-free composition.

https://doi.org/10.1590/0366-69132023693913475

Recycling of roof tile waste in the manufacturing of high-temperature metakaolin-based geopolymer composites
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Bezerra, B. P.

; Soares, G. A.

; Morelli, M. R.

; Luz, A. P.

Cerâmica

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jul 2023, Volume 69 N. 391 Pages 242 - 247

Abstract: En | Text: En | PDF: En

Abstract The possibility of recycling solid wastes in the production of geopolymers and advanced ceramic products has received special attention recently. This work investigated the feasibility of replacing a high amount (70-90 wt%) of metakaolin with roof tile waste (CW) in the production of Na-geopolymer composites. Additionally, the influence of this alternative material, in the phase transformations and properties evolution (elastic modulus, compressive strength, porosity, density, and linear shrinkage) of the prepared compositions after distinct thermal treatments (40-1000 °C) was evaluated. The results showed that the incorporation of CW powder into the geopolymeric compositions enhanced their thermal and mechanical properties up to 1000 °C. The best performance was reached when using 80 wt% of the selected waste, which led to ceramic specimens with high crystallinity (presenting quartz, hematite, and albite phases), compressive strength (39.6 MPa), suitable linear shrinkage (-7.4%), and improved thermal stability (without visual cracks) after firing at 1000 °C.

https://doi.org/10.1590/0366-69132023693913528

Thermal synthesis of NiMn2O4 spinel employing Mn oxide ores as starting material
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Nascimento, R. S.

; Figueira, B. A. M.

; F. Neto, E.

; Rabelo, A. A.

; Fernandez, O. J. C.

; Luz, P. T. S. da

; Costa, M. L. da

Cerâmica

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apr 2023, Volume 69 N. 390 Pages 154 - 160

Abstract: En | Text: En | PDF: En

Abstract It is described for the first time the synthesis and characterization of NiMn2O4 employing the Mn ores from the Amazon Region as starting material, instead of using commercial reagents as normally occurs in its synthesis process. Initially, an Mn ore was transformed into a single product, the octahedral layer (OL) manganese oxide with Ni2+ ions interlayer (Ni-OL-2), which was used as a matrix to obtain NiMn2O4 by thermal decomposition. The following techniques were used for characterization: X-ray diffraction (XRD), X-ray fluorescence spectroscopy (XRF), infrared spectroscopy (FTIR), thermal analysis (TG-DTA), scanning (SEM) and transmission (TEM) electron microscopies. The results revealed that Mn oxide ore composed of nsutite mineral transformed into a well-ordered crystalline Ni-OL-2 phase, after the hydrothermal and cation exchange process. The thermal decomposition of Ni-OL-2 produced the nickel manganite phase at 850 °C with spherical ball morphology and crystal sizes in the range of 200-300 nm.

https://doi.org/10.1590/0366-69132023693903436

Esferas de hidrogel relacionadas con oclusión intestinal
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Zurita-Martínez, Paulina M.

; Guerrero-Reséndiz, Diana A.

; Silva-Ramírez, Horacio

; Alcántara-Noguez, Carlos

; Lechuga-Mendoza, Luz A.

; Jiménez-Arrieta, Diana C.

; Vera-López, Isabel

; Torres-Hinojosa, Alejandra P.

Boletín médico del Hospital Infantil de México

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2023, Volume 80 Suppl. 1 Pages 64 - 68

Abstract: Es En | Text: Es En | PDF: Es | PDF: En

Resumen Introducción: La obstrucción intestinal por ingesta accidental de cuerpos extraños se presenta muy rara vez en la edad pediátrica debido a que del 80 al 90% de los objetos pueden pasar libremente por el tracto gastrointestinal. Caso clínico: Se aborda el caso de una paciente de sexo femenino de 1 año 2 meses quien presentó obstrucción intestinal debido a la ingesta de esferas de hidrogel (poliacrilato de sodio). Dichas esferas, que son utilizadas como juguetes didácticos o sensoriales, aumentan de 200 a 400 veces su tamaño inicial mediante la absorción de agua. Se realizó radiografía abdominal en proyección decúbito supino, donde llamó la atención el hallazgo de defecto de llenado redondeado en asa de flanco derecho, ya que las esferas de hidrogel son radiolúcidas. El diagnóstico se estableció mediante ultrasonido abdominal, donde se reportó líquido libre peritoneal con datos de suboclusión por cuerpos extraños a nivel intestinal. Se indicó tratamiento conservador, encontrando persistencia de aumento de perímetro abdominal. Se realizó enterotomía y se encontraron las esferas impactadas a 30 centímetros de la válvula ileocecal. Conclusiones: Las esferas de hidrogel son peligrosas para la población pediátrica. La evolución de la paciente fue favorable debido al conocimiento del objeto extraño ingerido. Sobresale la conducta expectante que se tuvo que desempeñar debido a que se desconocía el crecimiento de las esferas y en qué momento no podrían continuar su paso por el tracto gastrointestinal.

Abstract Background: Bowel obstruction due to accidental ingestion of foreign objects occurs rarely in children because 80 to 90% of the objects can pass freely through the gastrointestinal tract. Case report: We report a case of a 14-month-old infant who presented bowel obstruction caused by the ingestion of hydrogel beads (sodium polyacrylate). Hydrogel beads are used as sensory and didactic toys that can increase their initial size 200 to 400 times by liquid absorption. An abdominal X-ray was perfomed in anteroposterior supine projection, where a round filling defect at the loop of the right flank was detected; this came to our attention because hydrogel beads are usually radiolucent. The diagnosis was established by abdominal ultrasound where free intraperitoneal fluid was reported with data of small bowel pseudo-obstruction by foreign objects. Conservative treatment was prescribed, finding persistence of increased abdominal perimeter, so an enterotomy was performed for their removal; finding impacted hydrogel beads 30 centimeters from the ileocecal valve. Conclusions: Hydrogel beads are dangerous for the pediatric population. The evolution of the patient was favorable thanks to the knowledge of the foreign objects ingested. The expectant behavior that had to be executed, stands out because we had no knowledge as to the maximum size of the hydrogel in the gastrointestinal tract.

https://doi.org/10.24875/bmhim.22000137

Evaluation of the combined addition of aluminum lactate and calcium carbonate to alumina-based castables
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Consonni, L. B.

; Luz, A. P. da

; Pandolfelli, V. C.

Cerâmica

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jun 2021, Volume 67 N. 382 Pages 196 - 202

Abstract: En | Text: En | PDF: En

Abstract Calcium aluminate cement (CAC) can induce the development of high green mechanical strength to refractory castables in a short period of time (24 h). However, the production of this hydraulic binder is energy-intensive and releases a large content of carbon dioxide (CO2), which adds to global warming. Thus, aiming to develop an alternative binding system, this study investigated the combined addition of aluminum lactate (0.25-1.0 wt%) and calcium carbonate (3.2 wt%) to alumina castables. The prepared samples were analyzed using different experimental techniques, such as cold and hot modulus of rupture, hot elastic modulus, X-ray diffraction, and apparent porosity. According to the results, the lactate addition to the castables improved their green mechanical strength after drying at 110 °C/24 h (4.89 MPa) when compared to the one containing plain calcium carbonate (1.72 MPa). Furthermore, the carbonate-containing refractories presented cold and hot modulus of rupture similar or even superior to the castable containing cement in a wide temperature range (600-1500 °C).

https://doi.org/10.1590/0366-69132021673823104 185 downloads

Calcination thermokinetics of three Brazilian limestones
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Silveira, M. A. C. W. da

; Luz, J. A. M. da

; Faria, G. L. de

; Coutinho, F. M. P.

Cerâmica

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sep 2020, Volume 66 N. 379 Pages 297 - 306

Abstract: Pt En | Text: Pt En | PDF: Pt | PDF: En

Resumo Os produtores de calcário e cal inadvertidamente geram uma quantidade considerável de material fino durante o processamento, tornando-se um grande passivo ambiental. Quanto ao processo de calcinação, a indústria ressente-se de dados experimentais da lei de Arrhenius, como fator de frequência aparente e energia de ativação, referentes aos calcários brasileiros. O conhecimento desses parâmetros termocinéticos pode diminuir o consumo energético durante o processo de calcinação industrial, além de permitir o uso de finos de calcário em outras aplicações industriais. Este trabalho teve como objetivo caracterizar três calcários brasileiros, concentrando-se em sua calcinação em escala laboratorial, usando método quase isotérmico e dinâmico (termogravimétrico) para estimar seus parâmetros cinéticos. O método dinâmico permitiu estimar a energia de ativação de cada calcário através das regiões de alta taxa de calcinação. Porém, os parâmetros cinéticos estimados pelo método quase isotérmico resultaram em valores mais baixos, indicando a necessidade de controlar a atmosfera do reator.

Abstract Limestone and lime producers inadvertently generate a considerable amount of fine material during their processing, consequently becoming a great environmental liability. As far as the industrial calcination process is concerned, there is still a need for an experimental survey on Arrhenius law parameters, as apparent frequency factor and activation energy, referring to Brazilian limestones. The knowledge of these thermokinetic parameters may contribute to energy saving during the industrial calcination process, as well as for allowing the use of limestone fines in other industrial applications. This study aimed to characterize three Brazilian limestones by focusing on their laboratory-scale calcination using both quasi-isothermal and non-isothermal methods to estimate their kinetic parameters. The non-isothermal method (by thermogravimetric analyses) allowed estimating the activation energy for each limestone through the high calcination rate ranges. However, the kinetic parameters estimated by the quasi-isothermal method turned out in lower values, indicating the need to control the reactor atmosphere.

https://doi.org/10.1590/0366-69132020663792910 760 downloads

10.

Clinical and Epidemiological Characteristics of Patients Diagnosed with COVID-19 in a Tertiary Care Center in Mexico City: A Prospective Cohort Study
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Ortiz-Brizuela, Edgar

; Villanueva-Reza, Marco

; González-Lara, María F.

; Tamez-Torres, Karla M.

; Román-Montes, Carla M.

; Díaz-Mejía, Bruno A.

; Pérez-García, Esteban

; Olivas-Martínez, Antonio

; Rajme-López, Sandra

; Martinez-Guerra, Bernardo A.

; León-Cividanes, Nereyda A. de

; Fernández-García, Oscar A.

; Guerrero-Torres, Lorena

; Torres-González, Lorena

; Carrera-Patiño, Fabián A.

; Corral-Herrera, Ever A.

; Hernández-Alemón, Aldo N.

; Tovar-Vargas, Maria de los Ángeles

; Serrano-Pinto, Yamile G.

; Espejo-Ortiz, Cristian E.

; Morales-Ortega, María de la L.

; Lozano-Cruz, Óscar A.

; Cárdenas-Fragoso, José L.

; Vidal-Mayo, José de J.

; Hernández-Gilsoul, Thierry

; Rivero-Sigarroa, Eduardo

; Domínguez-Cherit, Guillermo

; Cervantes-Villar, Luz E.

; Ramos-Cervantes, Maria del P.

; Ibarra-González, Violeta

; Calva-Mercado, Juan J.

; Sierra-Madero, Juan G.

; López-Íñiguez, Álvaro

; Ochoa-Hein, Eric

; Crabtree-Ramírez, Brenda E.

; Galindo-Fraga, Arturo

; Guerrero-Almeida, María de L.

; Ruiz-Palacios, Guillermo M.

; Gulías-Herrero, Alfonso

; Sifuentes-Osornio, José

; Kershenobich-Stalnikowitz, David

; Ponce-de-León, Alfredo

Revista de investigación clínica

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jun 2020, Volume 72 N. 3 Pages 165 - 177

Abstract: En | Text: En | PDF: En

ABSTRACT Background: Regional information regarding the characteristics of patients with coronavirus disease (COVID)-19 is needed for a better understanding of the pandemic. Objective: The objective of the study to describe the clinical features of COVID-19 patients diagnosed in a tertiary-care center in Mexico City and to assess differences according to the treatment setting (ambulatory vs. hospital) and to the need of intensive care (IC). Methods: We conducted a prospective cohort, including consecutive patients with COVID-19 from February 26, 2020 to April 11, 2020. Results: We identified 309 patients (140 inpatients and 169 outpatients). The median age was 43 years (interquartile range, 33-54), 59.2% men, and 18.6% healthcare workers (12.3% from our center). The median body mass index (BMI) was 29.00 kg/m2 and 39.6% had obesity. Compared to outpatients, inpatients were older, had comorbidities, cough, and dyspnea more frequently. Twenty-nine (20.7%) inpatients required treatment in the IC unit (ICU). History of diabetes (type 1 or 2) and abdominal pain were more common in ICU patients compared to non-ICU patients. ICU patients had higher BMIs, higher respiratory rates, and lower room-air capillary oxygen saturations. ICU patients showed a more severe inflammatory response as assessed by white blood cell count, neutrophil and platelet count, C-reactive protein, ferritin, procalcitonin, and albumin levels. By the end of the study period, 65 inpatients had been discharged because of improvement, 70 continued hospitalized, and five had died. Conclusions: Patients with comorbidities, either middle-age obese or elderly complaining of fever, cough, or dyspnea, were more likely to be admitted. At admission, patients with diabetes, high BMI, and clinical or laboratory findings consistent with a severe inflammatory state were more likely to require IC.

https://doi.org/10.24875/ric.20000211 533 downloads

11.

Theoretical study of solvent effects on the hyperpolarizabilities of two chalcone derivatives
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Soares, João Victor B.

; Valverde, Clodoaldo

; Silva, André D. da

; Luz, Bruno V.

; dos Santos, Daniel Junior A.

; Carvalho, Elisa G. B.

; Oliveira, Yara Cecilia M.

; Napolitano, Hamilton B.

; Baseia, Basilio

; Osório, Francisco A. P.

Revista Colombiana de Química

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apr 2020, Volume 49 N. 1 Pages 33 - 39

Abstract: Es En Pt | Text: Es En Pt | PDF: Es | PDF: En | PDF: Pt

Resumen El uso de materiales orgánicos como materiales ópticos no lineales se ha explorado intensamente en los últimos años, debido a la facilidad de manipulación de estas estructuras moleculares y la flexibilidad de síntesis en relación con el cambio de grupos sustituyentes. En el presente trabajo, las propiedades lineales y no lineales de dos derivados de chalcona (E)-1-(4-metilfenil)-3-fenilprop-2-en-1-ona (4MP3P) y (E)-1-(4-nitrofenil)-3-fenilprop-2-en-1-ona (4NP3P), los cuales difieren en la posición del sustituyente en el anillo de fenilo, se estudiaron en presencia de disolventes próticos y apróticos simulados por el Modelo Continuo Polarizable a nivel DFT/B3LYP/6-311+G(d). Además, se estudiaron parámetros moleculares estáticos y dinámicos (1064 nm) como el momento dipolar, la polarización lineal y la primera y la segunda hiperpolarización en función del valor constante dieléctrico del disolvente. El comportamiento geométrico se estudió como ángulos de enlace químico, ángulos de torsión y distribución de carga parcial de compuestos, incluidos los cálculos de energía de huecos en varios solventes. Los resultados mostraron que el cambio del sustituyente CH3 (4MP3P) a NO2 (4NP3P) beneficia las propiedades ópticas no lineales de los compuestos en presencia del medio solvente, los valores absolutos de la primera hiperpolarizabilidad paralela fueron los que presentaron la mayor variación.

Abstract The use of organic as nonlinear optical materials has been intensively explored in the recent years due to the ease of manipulation of the molecular structure and the synthetic flexibility regarding the change of substituent groups. In the present work, the linear and nonlinear properties of two chalcones derivatives (E)-1-(4-methylphenyl)-3-phenylprop-2-en-1-one (4MP3P) and (E)-1-(4-Nitrophenyl)-3-phenylprop-2-en-1-one (4NP3P), that differ by the substituent position at the phenyl ring, were studied in the presence of protic and aprotic solvents simulated by the Polarizable Continuum Model (PCM) at DFT/B3LYP/6-311+G(d) level. The static and dynamic (1064 nm) molecular parameters as the dipole moment, linear polarizability, first and second hyperpolarizabilities were studied as function of the solvent dielectric constant value. The geometrical behavior as the chemical bond angles, torsion angles, and partial charges distribution of the compounds were studied, including calculations of gap energies in various solvents. The obtained results revealed that the substituent change of CH3 (4MP3P) to NO2 (4NP3P) benefits the nonlinear optical properties of the compounds in the presence of the solvent media, the absolute values of the parallel first hyperpolarizability were the ones that present the greater variation.

Resumo O uso de materiais orgânicos como materiais ópticos não lineares tem sido intensamente explorado nos últimos anos, devido à facilidade de manipulação dessas estruturas moleculares e à flexibilidade de síntese em relação à mudança de grupos substituintes. No presente trabalho, as propriedades lineares e não lineares de dois derivados de chalconas (E)-1-(4-metilfenil)-3-fenilprop-2-en-1-ona (4MP3P) e (E)-1-(4-nitrofenil)-3-fenilprop-2-en-1-ona (4NP3P), que diferem pela posição do substituinte no anel fenil, foram estudados na presença de solventes próticos e apróticos simulados pelo Modelo Continuo Polarizável (PCM) no nível DFT/B3LYP/6-311+G(d). Os parâmetros moleculares estáticos e dinâmicos (1064 nm) como momento dipolar, polarizabilidade linear, primeira e segunda hiperpolarizabilidades foram estudados em função do valor da constante dielétrica do solvente. Estudou-se o comportamento geométrico como ângulos de ligação química, ângulos de torção e distribuição parcial de cargas dos compostos, incluindo cálculos de energias de gap em vários solventes. Os resultados obtidos revelaram que a mudança do substituinte de CH3 (4MP3P) para NO2 (4NP3P) beneficia as propriedades ópticas não lineares dos compostos na presença do meio solvente, os valores absolutos da primeira hiperpolarizabilidade paralela foram os que apresentaram a maior variação.

https://doi.org/10.15446/rev.colomb.quim.v1n49.82156 401 downloads

12.

Uncommon anatomical sites and anatomopathological presentations of lymphoma in dogs
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Mazaro, Renata D.

; Luz, Flávia S.

; Herbichi, Alana P.

; Lorenzetti, Douglas M.

; Cogliati, Bruno

; Fighera, Rafael A.

Pesquisa Veterinária Brasileira

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apr 2020, Volume 40 N. 4 Pages 271 - 283

Abstract: Pt En | Text: Pt En | PDF: Pt | PDF: En

RESUMO: Linfomas são os tumores mais associados a morte ou eutanásia de cães na maior parte do mundo. Nessa espécie animal ocorrem quase sempre como uma doença disseminada (linfoma multicêntrico), gastrintestinal (linfoma alimentar) ou nodal mediastinal (linfoma mediastínico), entretanto, ocasionalmente, outras apresentações bem menos comuns podem ser encontradas. O objetivo deste artigo é estabelecer a prevalência desses pouco usuais tipos de linfoma e demonstrar aos patologistas veterinários como eles se apresentam anatomopatologicamente. De um total de 100 casos de linfoma em cães diagnosticados entre os anos de 1965 e 2017, 16 casos (16/100) foram considerados como apresentações não tradicionais da doença: linfoma folicular (5/100), linfoma de células T periférico inespecífico (2/100), linfoma angiocêntrico (2/100), linfoma intravascular de grandes células T (2/100), granulomatose linfomatoide (2/100), linfoma de grandes células anaplásicas (1/100), linfoma hepatoesplênico de células T (1/100) e linfoma linfocítico crônico de pequenas células B - tipo intermediário (1/100). Esperamos que os resultados aqui demonstrados auxiliem patologistas veterinários a reconhecerem tais casos de “linfomas atípicos” em suas rotinas diagnósticas.

ABSTRACT: Lymphomas are the tumors most frequently associated with the death or euthanasia of dogs in most parts of the world. In dogs, they almost always occur as disseminated (multicentric lymphoma), gastrointestinal (alimentary lymphoma), or nodal mediastinal (mediastinal lymphoma) diseases. However, other uncommon presentations can occasionally occur. This study aimed to establish the prevalence of these unusual types of lymphoma and demonstrate to veterinary pathologists how they present pathologically. From a total of 100 cases of lymphoma in dogs diagnosed between 1965 and 2017, 16 cases (16/100) were considered by us as non-traditional presentations of the disease: follicular lymphoma, (5/100), peripheral T-cell lymphoma, NOS (2/100), angiocentric lymphoma (2/100), intravascular large T-cell lymphoma (2/100), lymphomatoid granulomatosis (1/100), anaplastic large-cell lymphoma (1/100), hepatosplenic T-cell lymphoma (1/100), and chronic small B-cell lymphocytic lymphoma, intermediate type (1/100). We hope that the results presented here can help veterinary pathologists to recognize such cases of “atypical lymphoma” in their diagnostic routines.

https://doi.org/10.1590/1678-5150-pvb-6488 1857 downloads

13.

Uso de partículas magnéticas en la purificación de anticuerpos IgM contra Taenia solium
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Perez, L. Agueda

; Castillo, Yesenia

; Espinoza, Cindy

; Toribio, Luz M.

; Santos, Yesica

; Martel, Kevin S.

; Wilkins, Patricia P.

; Bustos, Javier A.

; García, Hector H.

; Castro-Sesquen, Yagahira E.

Revista Peruana de Medicina Experimental y Salud Pública

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mar 2020, Volume 37 N. 1 Pages 104 - 109

Abstract: En Es | Text: En Es | PDF: En | PDF: Es

ABSTRACT The use of L protein coupled magnetic particles for the concentration and purification of immunoglobulin M (mIgM) monoclonal antibodies against Taenia solium was evaluated. Three concentration methods and different elution times were evaluated and the ratio of particles to the ratio of mIgM was optimized. It is demonstrated that: 1) with the use of magnetic particles, a previous concentration of mIgM is not required, which reduces the manipulation of the antibodies and improves the recovery, 2) the use of a binding buffer can be omitted, since the pH of most cell culture supernatants are neutral, and 3) longer elution times (~ 45 minutes) are needed to increase recovery to a level greater than 80%. The study demonstrates that the use of L protein-coupled magnetic particles is a simple and efficient tool for mIgM concentration and purification.

RESUMEN Se evaluó el uso de partículas magnéticas acopladas a proteína L para la concentración y purificación de anticuerpos monoclonales inmunoglobulina M (mIgM) contra Taenia solium. Se evaluaron tres métodos de concentración y diferentes tiempos de elución y se optimizó la proporción de partículas a la proporción de mIgM. Demostramos que: 1) con el uso partículas magnéticas no se requiere de una concentración previa de mIgM, lo que disminuye la manipulación de los anticuerpos y mejora la recuperación, 2) se puede omitir el uso de un tampón de unión, ya que el pH de la mayoría de los sobrenadantes de cultivo celular son neutros, y 3) se necesitan tiempos de elución más largos (~45 minutos) para aumentar la recuperación a un nivel mayor a 80%. El estudio demuestra que el uso de partículas magnéticas acopladas a proteína L es una herramienta simple y eficiente para la concentración y purificación de mIgM.

https://doi.org/10.17843/rpmesp.2020.371.4628

14.

Uso de partículas magnéticas en la purificación de anticuerpos IgM contra Taenia solium
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Perez, L. Agueda

; Castillo, Yesenia

; Espinoza, Cindy

; Toribio, Luz M.

; Santos, Yesica

; Martel, Kevin S.

; Wilkins, Patricia P.

; Bustos, Javier A.

; García, Hector H.

; Castro-Sesquen, Yagahira E.

Revista Peruana de Medicina Experimental y Salud Publica

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jan 2020, Volume 37 N. 1 Pages 104 - 109

Abstract: En Es | Text: En Es | PDF: En | PDF: Es

https://doi.org/10.17843/rpmesp.2020.371.4628

15.

Metodología para la elaboración de la Guía de práctica clínica
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Torres-Tamayo, Margarita

; Zurita-Cruz, Jessie N.

; Aguilar-Herrera, Blanca E.

; Miranda-Lora, América L.

; Calzada-León, Raúl

; Rivera-Hernández, Aleida J.

; Morales-Pérez, Marco A.

; Padrón-Martínez, Miriam M.

; Ruiz-Reyes, María L.

; García-Morales, Leticia M.

; Barrón-Uribe, Consuelo

; Arguinzoniz-Valenzuela, Sletza L.

; Torres-Castañeda, Mayra C.

; Lizárraga-Paulin, Lorena

; Núñez-Hernández, Jorge A.

; Cornejo-Barrera, Judith

; Vidal-González, María T.

; Martínez-Alvarado, María R.

; Nishimura-Meguro, Elisa

; Bravo-Ríos, Luz E.

; Garrido-Magaña, Eulalia P.

; Orozco-Morales, José A.

; Medina-Bravo, Patricia G.

; Coyote-Estrada, Ninel

; Castilla-Peón, M. Fernanda

Boletín médico del Hospital Infantil de México

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2020, Volume 77 Suppl. 1 Pages 1 - 6

Abstract: En Es | Text: En Es | PDF: En | PDF: Es

Abstract Background: The Mexican Society of Pediatric Endocrinology presents recommendations for the diagnosis and treatment of precocious puberty (PP), a condition defined as the development of sexual characteristics due to an increase in pituitary gonadotropin secretion before 8 or 9 years of age in girls and boys, respectively. Methods: Three systematic reviews were conducted: controlled clinical trials on interventions for PP treatment, diagnostic tests, and observational studies on the long-term effects of PP. The quality evaluation and data extraction from the studies were conducted by two independent reviewers. The Scottish Intercollegiate Guidelines Network and the Oxford Center for Evidence-Based Medicine systems were used for grading the quality of evidence for recommendations on intervention and diagnosis, respectively. Recommendations were submitted to a consensus by a Delphi method and were validated by another 143 certified pediatric endocrinologists through an online questionnaire. Results: The group generated 12 recommendations on the diagnosis of PP, seven on the diagnosis of secondary causes of PP, eight on interventions for inhibition of puberty, five on other interventions for PP treatment, and 14 for the monitoring and follow-up of these patients. The online questionnaires submitted to certified pediatric endocrinologists showed more than 90% of approval for each one of the recommendations. Conclusions: Although a high degree of consensus for the recommendations for diagnosis, treatment, and monitoring of PP among pediatric endocrinologists was achieved, most of these recommendations showed a low level of evidence.

Resumen Introducción: La Sociedad Mexicana de Endocrinología Pediátrica presenta recomendaciones para el diagnóstico y el tratamiento de la pubertad precoz (PP), condición definida como el desarrollo de caracteres sexuales por incremento en la secreción hipofisiaria de gonadotropinas antes de los 8 años en las niñas y de los 9 años en los niños. Métodos: Se realizaron tres revisiones sistemáticas de ensayos clínicos controlados sobre intervenciones para el tratamiento de la PP, pruebas diagnósticas y estudios observacionales sobre efectos a largo plazo de la PP. La evaluación de la calidad de los estudios y la extracción de datos se realizó por pares. La evidencia se graduó con el sistema de la Scottish Intercollegiate Guidelines Network (SIGN) y del Oxford Centre for Evidence-Based Medicine (OCEBM) para las recomendaciones sobre la intervención y el diagnóstico, respectivamente. Las recomendaciones generadas se sometieron a un consenso por el método Delphi y fueron validadas por otros 143 endocrinólogos pediatras certificados mediante un cuestionario en línea. Resultados: Mediante consenso se generaron 12 recomendaciones para el diagnóstico de PP, siete sobre diagnóstico de causas secundarias de PP, ocho sobre intervenciones para inhibición de la pubertad, cinco sobre otras intervenciones en PP y 14 para la monitorización del tratamiento y el seguimiento de estos pacientes. Se obtuvo más del 90% de aprobación para cada una de las recomendaciones por el grupo de endocrinólogos certificados que respondieron el cuestionario en línea. Conclusiones: Si bien se logró un alto grado de consenso para las recomendaciones para el diagnóstico, el tratamiento y la monitorización de la PP entre los endocrinólogos pediatras, el nivel de evidencia para la mayoría de estas recomendaciones resultó bajo.

https://doi.org/10.24875/bmhim.20000083 411 downloads

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