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Use of Iron Ore Tailing as Raw Material for Two Products: Sodium Silicate and Geopolymers
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Prates, Caroline D.

; Lima, Athos S.

; Ferreira, Igor C.

; Paula, Fabiano G. F. de

; Pinto, Paula S.

; Ardisson, José D.

; Lago, Rochel M.

; Teixeira, Ana Paula C.

Journal of the Brazilian Chemical Society

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2023, Volume 34 Nº 6 Páginas 809 - 818

Resumo: En | Texto: En | PDF: En

In this work, iron ore tailing (IOT) was used for the production of two different materials: sodium silicate and geopolymers. Initially, reactions of IOT with NaOH were carried out by hydrothermal reaction in autoclave at 200 °C (1:1.5 and 1:2.5 SiO2:NaOH molar ratio) and reaction times of 4 and 8 h. X-ray fluorescence by dispersive energy (XRF), X-ray diffraction (XRD), Mössbauer spectroscopy, scanning electron microscopy (SEM-EDS) and titrations showed that IOT:NaOH ratios of 1:2.5 and reaction time 8 h completely dissolved the quartz from the IOT, obtaining a solid fraction consisting mainly of hematite and an aqueous phase of sodium silicate, which showed contents of ca. 23% SiO2 and 19% Na2O. This sodium silicate obtained was then combined with IOT (25 and 50 wt.%) to produce geopolimeric material with excellent physico-chemical properties, fast curing time and very good compressive strength results, which ranged from 41 to 58 MPa and many potential applications.

https://doi.org/10.21577/0103-5053.20220149

Pacientes oncológicos sob cuidados paliativos: ocorrências relacionadas à punção venosa e hipodermóclise
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Bolela, Fabiana

; Lima, Roberta de

; Souza, Ana Carolina de

; Moreira, Michele Rocha

; Lago, Ana Julia de Oliveira

; Simino, Giovana Paula Rezende

; Araújo, Jakeline Silva de

Revista Latino-Americana de Enfermagem

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2022, Volume 30 elocation e3623

Resumo: Pt En Es | Texto: Pt En Es | PDF: Pt | PDF: En | PDF: Es

Resumo Objetivo: identificar as ocorrências relacionadas à punção venosa periférica e à hipodermóclise entre pacientes internados em um hospital geral e em um hospital exclusivo de assistência a pacientes em cuidados paliativos oncológicos. Método: estudo observacional, descritivo e multicêntrico. A amostra do tipo consecutiva e não probabilística foi constituída por 160 pacientes oncológicos internados sob cuidados paliativos. A variável desfecho correspondeu às ocorrências e complicações relacionadas a cada tipo de punção. Utilizou-se um questionário contendo as variáveis sociodemográficas e clínicas e um roteiro estruturado para acompanhamento e avaliação diária da punção. Foram utilizadas estatísticas descritivas para a análise dos dados. Resultados: as ocorrências relacionadas à punção venosa no hospital geral foram sujidade de sangue na inserção do cateter (17,4 %) e prazo de uso expirado (15,8%), enquanto no serviço específico para atendimento a pacientes sob cuidados paliativos foram prazo de uso expirado (32%) seguido de infiltração (18,9%). Quanto à hipodermóclise, foram duas punções subcutâneas com sinais flogísticos (1,0%) no hospital geral e um hematoma no local de inserção do cateter (0,5%). No serviço específico para atendimento a pacientes sob cuidados paliativos foram três punções subcutâneas com sinais flogísticos (5,7%). Conclusão: as ocorrências relacionadas à punção venosa periférica foram superiores às relacionadas à hipodermóclise.

Abstract Objective: to identify the occurrences related to peripheral venipuncture and hypodermoclysis among patients hospitalized in a general hospital and in an exclusive hospital institution for the care of patients in palliative cancer care. Method: an observational, descriptive and multicenter study. The consecutive and non-probabilistic sample consisted of 160 cancer patients hospitalized in Palliative Care. The outcome variable corresponded to the occurrences and complications related to each type of puncture. A questionnaire containing the sociodemographic and clinical variables and a structured script for monitoring and daily evaluation of the puncture were used. Descriptive statistics were employed for data analysis. Results: the occurrences related to venipuncture at a general hospital were blood soiling at catheter insertion (17.4%) and expired use period (15.8%), while at a specific service for the care of patients under palliative care they were expired use period (32%) followed by infiltration (18.9%). As for hypodermoclysis, there were two subcutaneous punctures with phlogistic signs (1.0%) at the general hospital and a hematoma at the catheter insertion site (0.5%). At the specific service for the care of patients under palliative care there were three subcutaneous punctures with phlogistic signs (5.7%). Conclusion: the number of occurrences related to peripheral venipuncture was higher than those related to hypodermoclysis.

Resumen Objetivo: identificar los eventos relacionados con la venopunción periférica y la hipodermoclisis en pacientes hospitalizados en un hospital general y en un hospital que atiende exclusivamente a pacientes en cuidados paliativos oncológicos. Método: estudio observacional, descriptivo y multicéntrico. La muestra consecutiva y no probabilística estuvo compuesta por 160 pacientes oncológicos hospitalizados que reciben cuidados paliativos. La variable resultado correspondió a los eventos y complicaciones relacionados con cada tipo de punción. Se utilizó un cuestionario con variables sociodemográficas y clínicas y una guía estructurada para el seguimiento diario y la evaluación de la punción. Se utilizó estadística descriptiva para el análisis de datos. Resultados: los eventos relacionados con la venopunción en un hospital general fueron contaminación de sangre en la inserción del catéter (17,4%) y catéter vencido (15,8%), mientras que en un hospital específico que atiende exclusivamente a pacientes en cuidados paliativos oncológicos fueron catéter vencido (32%) seguido de infiltración (18,9%). En cuanto a la hipodermoclisis, hubo dos punciones subcutáneas con signos flogísticos (1,0%) en hospital general y un hematoma en el lugar de inserción del catéter (0,5%). En el hospital en un hospital que atiende exclusivamente a pacientes en cuidados paliativos oncológicos hubo tres punciones subcutáneas con signos flogísticos (5,7%). Conclusión: los eventos relacionados con la venopunción periférica fueron mayores que los relacionados con la hipodermoclisis.

https://doi.org/10.1590/1518-8345.5825.3623

Iron Recovery from Iron Ore Tailings by Direct Hydrogen Reduction at Low Temperature and Magnetic Separation
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Pinto, Paula S.

; Milagre, Luisa E.

; Moreira, Larissa C. M.

; Rocha Junior, Hamilton P.

; Salviano, Adriana B.

; Ardisson, José D.

; Parreira, Fabrício V.

; Teixeira, Ana Paula C.

; Lago, Rochel M.

Journal of the Brazilian Chemical Society

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2022, Volume 33 Nº 8 Páginas 969 - 977

Resumo: En | Texto: En | PDF: En

In this work, we describe a sustainable alternative to recover iron from two iron ore tailings (IOT) using hydrogen reduction at relatively low temperatures followed by magnetic separation. X-ray powder diffraction (XRD), inductively coupled plasma (ICP), atomic absorption (AA), Mössbauer, scanning electron microscopy (SEM/EDS), Raman and thermogravimetry (TG) analyses indicated that the Fe oxide present in the IOTs (sandy tailing (ST) and mud tailings (MT)), can be reduced with H2 at 500 ºC to produce α-Fe. Upon magnetic separation the mud tailing produced a 77 wt.% magnetic fraction increasing the Fe content from 19.2 to ca. 56 wt.% of Fe. On the other hand, the sandy tailing resulted in a 15 wt.% magnetic fraction increasing the Fe content from 19.2 to 70 wt.%. These results indicate that up to 86% of iron can be recovered from the IOT wastes already in the metallic form which can be very interesting for the steel industry.

https://doi.org/10.21577/0103-5053.20220053

Movimento Química pós 2022: construção de um plano de ação para que a Química e Seus Atores impactem a Sustentabilidade e Soberania no Brasil
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Silva, Ingrid F.

; Nascimento, Pedro H.P.

; Lago, Rochel M.

; Ramos, Mozart N.

; Galembeck, Fernando

; Rocha Filho, Romeu C.

; Teixeira, Ana Paula C.

Química Nova

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2022, Volume 45 Nº 4 Páginas 497 - 505

Resumo: Pt | Texto: Pt | PDF: Pt

Considering the bicentenary of Brazil’s Independence in 2022 and that this year was proclaimed by UNESCO as the International Year of Basic Sciences for Sustainable Development, in mid-2021 the Brazilian Chemical Society (SBQ) launched the “Post 2022 Chemistry Movement - Sustainability and Sovereignty”, with the main goal of promoting different activities so that chemistry contributes for the sustainable development and sovereignty of Brazil in the coming years. One of these activities is the proposal of an action plan, with goals to be achieved by 2030 and 2050. This article describes in detail how this action plan was formulated by a working group, with the help of an advisory council and interviews of 18 professionals from universities, the government, industries, the third sector and other organizations. Mimicking the Agenda 2030 SDGs, the resulting action plan is based on two broad Chemistry Sustainable Development Goals: promoting sustainability through chemistry in basic education, and promoting sustainability in the industry and university through science, technology, innovation, and education (STI&E) in chemistry. After the definition of three driving technological challenges in STI&E, they shall be successively implemented through different actions starting in 2023 yet.

https://doi.org/10.21577/0100-4042.20170898

Iron Ore Tailings: Characterization and Applications
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Carmignano, Ottávio R.

; Vieira, Sara S.

; Teixeira, Ana Paula C.

; Lameiras, Fernando S.

; Brandão, Paulo Roberto G.

; Lago, Rochel M.

Journal of the Brazilian Chemical Society

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Out 2021, Volume 32 Nº 10 Páginas 1895 - 1911

Resumo: En | Texto: En | PDF: En

Currently, approximately 1.4 billion tons per year of iron ore tailing wastes (IOT) are generated, mainly in Australia, Brazil, and China. This work describes the characterization and application of two typical IOT, i.e., fine and coarse wastes. The physicochemical characterization of these IOT by different techniques such as XRF (X-ray fluorescence), XRD (X-ray diffraction), Mössbauer spectroscopy, and granulometry, indicates for the fine tailing a composition of Fe2O3/FeOOH (10-55%), SiO2 (18-65%) and Al2O3 (up to 15%) with particles of 6-40 µm, whereas the coarse tailing presents 40-150 µm particles with the composition of 8-48% Fe2O3/FeOOH, 30-90% SiO2 and Al2O3 (up to 20%). The main IOT applications discussed in this review are related to civil construction (aggregates for concrete, mortar, Portland cement additives), ceramic industry, geopolymer, synthesis of new materials such as zeolites, mesoporous silica, carbon nanotubes, adsorbents, catalysts for different reactions, in batteries and in fuel cells. It was also carried out an analysis of patents related to IOT applications and the main technological and market barriers that hinder the industrial and commercial uses of these wastes.

https://doi.org/10.21577/0103-5053.20210100 111 downloads

PROCESO DE ACTUALIZACIÓN DE LA AGENDA NACIONAL DE INVESTIGACIÓN EN SALUD PÚBLICA 2021-2022
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Vior, Natacha Traverso

; Barrenechea, Rosario

; Torales, Santiago

; Lago, Manuel

; Carbonelli, Carla

; Faletty, Carolina

; Monte, Gabriel González Villa

; Cabrera, Jorge

; Sartor, Paula

; Sandoval, Alejandra

; Mercado, Daniel

; Andino, Gerardo

; Pisarello, María Susana

; Benzi, Patricia

; Zamponi, Hernán

; Elorza, Claudia

; Lamo, Carlos

; Laconi, Myriam

; Martín, María Cristina

; Margaría, Laura

; Oliva, Valeria

; Paso, Andrea Pérez

; Suarez, Elsa Fanny

; Pejkovic, Celina

; Mansilla, Celina

; Perichón, Mario

; Andrek, Gastón

; Burgos, Graciela

; Laio, Alejandro

; Bruno, María Peral de

; Sobarzo, Analía

; Cava, Gonzalo La

; Crudo, Denis

; Pozo, Luciana

; Ceriotto, Mariana

; Álvarez, Daniela

; Silberman, Pedro

; Pereyra, Ana Teresa

; Toledo, Laura

Revista Argentina de Salud Pública

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Fev 2021, Volume 13 Páginas 301 - 310

Resumo: En Es | Texto: En Es | PDF: En | PDF: Es

ABSTRACT INTRODUCTION : A participatory National Public Health Research Agenda (ANISP) with thematic prioritization is a strategic element to generóte evidence-based recommendations and public policies that have a positive impact on the health of populations and enable to achieve health objectives. The Directorate of Health Research (DIS) ofthe Argentine Ministry of Health (MSAL), through the Ministerial NetWork of Health Research (REMINSA), along with adors from the provincial and national government levels belonging to public, privóte, health, academic and research sectors participated in the update of the ANISP. They adapted the original tooI proposed by the Pan American Health Organizatlon and used in the process in 2019. The update included different stages. The selection ofthe topics had the legitimacy, recognition and participation ofthe actors involved, related to health, to government and privóte management and to scientific research; the work was conducted in a federal and transversal manner by consensus with the provincial networks and a Central Advisory Committee in the MSAL. Based on the preliminary guidelines obtained, a semi-structured online survey was developed and distributed to all federal actors, receiving 431 responses. The process resulted in 55 priorilized guidelines, divided into 6 thematic oreas and 33 sub-themes, selected by voting according to importance, impact and feasibility.

RESUMEN INTRODUCCIÓN : Una Agenda Nacional de Investigación en Salud Pública (ANISP) participativa y con priorización temática constituye un elemento estratégico para generar recomendaciones y políticas públicas basadas en evidencia, que imparten positivamente en la salud de las poblaciones y permitan lograr los objetivos sanitarios. En la actualización de la ANISP participaron la Dirección de Investigación en Salud (DIS) del Ministerio de Salud de la Nación (MSAL), a través de la Red Ministerial de Investigación en Salud (REMINSA), y actores de los niveles gubernamentales provinciales y nacionales pertenecientes a los sectores público, privado, de la salud, académico y de investigación. Se adaptó la herramienta original propuesta por la Organización Panamericana de la Salud, utilizada en el proceso en 2019. La actualización abarcó diferentes etapas. La selección de los temas contó con la legitimidad, reconocimiento y participación de los actores vinculados a la salud, a la gestión gubernamental y privada y a la investigación científica; se trabajó de manera federal y transversal, por consenso con las redes provinciales y un Comité Central Asesor en el MSAL. A partir de los lineamientos preliminares obtenidos, se elaboró una encuesta en línea semiestructurada, que fue distribuida a todos los actores federales y recibió 431 respuestas. El proceso resultó en 55 lineamientos priorizados, divididos en 6 áreas temáticas y 33 subtemas, seleccionados por votación según importancia, impacto y factibilidad.

620 downloads

New Magnetic Fe Oxide-Carbon Based Acid Catalyst Prepared from Bio-Oil for Esterification Reactions
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Ballotin, Fabiane C.

; Almeida, Vitor F.

; Ardisson, José D.

; Silva, Márcio J. da

; Soares, Ricardo R.

; Teixeira, Ana Paula C.

; Lago, Rochel M.

Journal of the Brazilian Chemical Society

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Ago 2020, Volume 31 Nº 8 Páginas 1714 - 1724

Resumo: En | Texto: En | PDF: En

In this work, bio-oil (an organic matrix rich in oxygen functionalities) was used to efficiently dissolve and disperse Fe3+ which upon thermal treatment produced a carbon containing dispersed and encapsulated Fe oxide magnetic nanoparticles. These materials were prepared by dissolution of 8, 16 and 24 wt.% Fe3+ salt in bio-oil followed by treatment at 400, 450, 500 or 600 ºC in N2 atmosphere. X-ray diffraction (XRD), scanning (SEM) and transmission electron microscopies (TEM), elemental analysis, thermogravimetric-mass spectrometry (TG-MS), potentiometric titration, Raman and Mössbauer spectroscopies showed that Fe3+ species in bio-oil is reduced to produce magnetic nanoparticles phases: magnetite Fe3O4 and maghemite γ-Fe2O3. At low temperatures, the iron phases were less protected, and the carbon matrix was more reactive, while in temperatures above 500 ºC, the iron phases were more stable, however, the carbon matrix was less reactive. Reaction of these magnetic carbon materials with concentrated H2SO4 produced surface sulfonic acidic sites (ca. 1 mmol g-1), especially for the materials obtained at 400 and 450 ºC. The materials were used as catalysts on esterification reaction of oleic acid with methanol at 100 ºC and conversions of 90% were reached, however, after 2 consecutive uses, the conversion decreased to 30%, being required more studies to improve the material stability.

https://doi.org/10.21577/0103-5053.20200057 263 downloads

Potential Slow Release Fertilizers Based on K2MgSiO4 Obtained from Serpentinite
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Ballotin, Fabiane C.

; Santos, Wedisson O.

; Mattiello, Edson M.

; Carmignano, Ottávio

; Teixeira, Ana Paula C.

; Lago, Rochel M.

Journal of the Brazilian Chemical Society

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Abr 2020, Volume 31 Nº 4 Páginas 653 - 661

Resumo: En | Texto: En | PDF: En

In this work, a potassium magnesium silicate mineral based on phase K2MgSiO4 was prepared from serpentinite rock and studied as a potential K and Mg slow-release fertilizer. The material was prepared by impregnation of serpentinite/KOH and calcination at 700 °C to produce K2MgSiO4 phase, olivine and forsterite. The release patterns of K and Mg in the stirred-flow trial and leaching through the soil columns showed that K2MgSiO4-based materials released K on lower rates than KCl and MgSO4.7H2O, however, there was no evidence of Mg release. The extraction with 1 mol L-1 NH4OAc showed a considerable content of Mg and K for K2MgSiO4-based materials, due to exchange of NH4+ and Mg2+. X-ray diffraction (XRD) analysis of materials impregnated with K and calcined showed peaks relative to K2MgSiO4. After leaching, the peaks intensity diminished, supporting that part of K leached. Therefore, the samples showed great potential as slow-release K-fertilizers when compared with KCl source.

https://doi.org/10.21577/0103-5053.20190229 241 downloads

Solid State Reaction of Serpentinite Mg3Si2O5(OH)4 with NaOH to Produce a New Basic Catalytic Phase Na2Mg2Si2O7 for Biodiesel Production
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Paz, Gilvan M.

; Vieira, Sara S.

; Bertoli, Alexandre C.

; Ballotin, Fabiane C.

; Moura, Edmilson M. de

; Teixeira, Ana Paula C.

; Costa, Demétrio A. S.

; Carmignano, Ottávio

; Lago, Rochel M.

Journal of the Brazilian Chemical Society

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Set 2018, Volume 29 Nº 9 Páginas 1823 - 1829

Resumo: En | Texto: En | PDF: En

Solid state reaction of serpentinite Mg3Si2O5(OH)4 with NaOH was investigated to produce new NaMgSi oxide phases with basic properties for application in catalysis. X-ray powder diffraction (XRD) showed that NaOH impregnated on serpentinite, specially 20% sodium and treated at 700 ºC (20Na700), led to the formation of a new crystalline phase Na2Mg2Si2O7. This solid state reaction is discussed in terms of a first step involving Na+ diffusion and intercalation in the interlayer space of the serpentinite structure followed by a dihydroxylation and formation of the NaMgSi oxides. Temperature programmed reaction and desorption experiments with 20Na700 combined with XRD suggested a strong basicity with high CO2 uptake likely due to diffusion and interaction with the basic sites in the material structure. These materials were tested as catalysts for the transesterification of soybean oil with methanol. The obtained results are discussed in terms of a basic site Si-O-Na+ present in the in the Na2Mg2Si2O7 structure.

https://doi.org/10.21577/0103-5053.20180058 974 downloads

10.

Functional outcomes in patients submitted to restorative proctocolectomy with ileal pouch anal anastomosis in a single tertiary center
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Silva, Ana Cristina

; Sampaio, Mónica

; Marcos-Pinto, Ricardo

; Lago, Paula

; Rocha, Anabela

; Matos, Eduarda

; Santos, Marisa D.

Journal of Coloproctology (Rio de Janeiro)

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Mar 2018, Volume 38 Nº 1 Páginas 30 - 36

Resumo: Pt En | Texto: Pt En | PDF: Pt | PDF: En

RESUMO Introdução: Os resultados funcionais após proctocolectomia restauradora em casos de colite ulcerativa e polipose adenomatosa familiar são variáveis. Avaliamos os resultados funcionais em pacientes com anastomose ileoanal e bolsa ileal bem como os fatores potenciais associados a resultados funcionais fracos. Métodos: Estudo retrospectivo de coorte com 38 pacientes submetidos a proctocolectomia restauradora com anastomose ileoanal e bolsa ileal, no contexto de colite ulcerativa e polipose adenomatosa familiar, em um centro de referência terciário, no período entre 1993 e 2013. Analisamos os registos clínicos e realizamos entrevistas telefónicas com um questionário protocolado a 32 pacientes (12 colite ulcerativa, 20 polipose adenomatosa familiar). Também foram avaliados os resultados funcionais da bolsa, com base no escore de Oresland. Os resultados funcionais foram analisados em quatro pontos do desfecho de cada paciente. Resultados: Em 25 pacientes foi realizada proctocolectomia restauradora com anastomose ileoanal e bolsa ileal, e em 7 pacientes uma colectomia total precedeu a protectomia com anastomose ileoanal e bolsa ileal. Todos os pacientes foram submetidos a uma ileostomia protetora. Não ocorreram óbitos e as complicações pós-operatórias relacionadas com a bolsa chegaram a 12,5%, mas foram tratadas conservadoramente. O seguimento médio foi de 13,2 anos. Ocorreu defeito na bolsa em 9,4% (2 em polipose adenomatosa familiar e 1 em colite ulcerativa). Os pacientes com polipose adenomatosa familiar obtiveram o melhor resultado; contudo, em ambos os grupos o resultado foi considerado aceitável. A mediana do score de Oresland foi boa, tendo sido observadas pequenas variações ao longo dos anos, embora o melhor score tenha sido verificado 5 anos após a cirurgia. Conclusões: A longo prazo, os resultados para os pacientes submetidos a proctocolectomia restauradora com anastomose ileoanal e bolsa ileal foram bons em ambos os grupos, embora tenham sido considerados melhores nos pacientes com polipose adenomatosa familiar. Nos dois grupos, o melhor escore de resultados funcionais parece ser alcançado por volta dos 5 anos após a cirurgia.

ABSTRACT Background: Functional results after restorative proctocolectomy for ulcerative colitis and familial adenomatous polyposis are variable. We assessed functional results in patients with ileal pouch anal anastomosis and evaluated potential factors associated with poor functional results. Methods: Retrospective cohort study of 38 patients who were submitted to a restorative proctocolectomy with ileal pouch anal anastomosis, in the context of ulcerative colitis and familial adenomatous polyposis, in at tertiary referral center, in the period between 1993 and 2013. Clinical records were analyzed and telephone interviews with protocoled questionnaire to 32 patients (12 ulcerative colitis, 20 familial adenomatous polyposis) were performed. Pouch functional results were also evaluated based in the Oresland score. The functional results were analyzed at four points of the patient outcome. Results: In 25 patients were performed restorative proctocolectomy with ileal pouch anal anastomosis and in 7 patients total colectomy preceded protectomy with ileal pouch anal anastomosis. Protective ileostomy was performed in all patients. There was no mortality and post-operative complications related with the pouch was 12.5% but treated conservatively. The mean follow-up was 13.2 years. Pouch failure occurs in 9.4% (2 in familial adenomatous polyposis and 1 in ulcerative colitis). Familial adenomatous polyposis patients achieved the best outcome but the outcome was acceptable in both groups. The median Oresland score was good with small variations over the years, although the best score being reached at 5 years after the surgery. Conclusions: The long-term results in patients undergoing restorative proctocolectomy with ileal pouch anal anastomosis were good in both groups, although better in familial adenomatous polyposis. In both, the best score of functional results seems to be reached at 5 years after surgery.

https://doi.org/10.1016/j.jcol.2017.09.416 746 downloads

11.

Application of an Ionic Liquid in the Microwave Assisted Extraction of Cytotoxic Metabolites from Fruits of Schinus terebinthifolius Raddi (Anacardiaceae)
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Morais, Thiago R.

; Coutinho, Ana Paula R.

; Camilo, Fernanda F.

; Martins, Tereza S.

; Sartorelli, Patricia

; Massaoka, Mariana H.

; Figueiredo, Carlos R.

; Lago, João Henrique G.

Journal of the Brazilian Chemical Society

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Mar 2017, Volume 28 Nº 3 Páginas 492 - 497

Resumo: En | Texto: En | PDF: En

This work reports the application of an ionic liquid (1-butyl-3-methylimidazolium bromide, BMImBr) in the microwave assisted extraction (MAE) of metabolites from fruits of Schinus terebinthifolius. Dried fruits were individually extracted using BMImBr:H2O 1:1, v/v (experiment 1) and pure H2O (experiment 2) by MAE (10 min at 60 ºC). After partition using EtOAc, the yield to experiment 1 was about 23% while to experiment 2 was 0.1%. The EtOAc fraction obtained from experiment 1 was purified by chromatographic methods to afford 3-oxotirucalla-7,24Z-dien-27-oic acid, 3a-hydroxytirucalla-7,24Z-dien-27-oic acid, 3a-acetoxytirucalla-7,24Z-dien-27-oic acid, gallic acid, and ethyl gallate, being the first occurrence of the third compound as natural product. Cytotoxic activity was evaluated in vitro against cancer cell lines (A2058, HeLa, SiHa, HCT, SKBR-3, U87, and B16F2Nex2), being 3a-acetoxytirucalla-7,24Z-dien-27-oic acid the more active metabolite with IC50 ranging from 10.9 ± 1.3 to 17.3 ± 1.4 µg mL-1, lower than that determined to positive control cisplatin.

https://doi.org/10.21577/0103-5053.20160215 1137 downloads

12.

Clinical profile of 93 cases of 46, XY disorders of sexual development in a referral center
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Mota, Bianca Costa

; Oliveira, Luciana Mattos Barros

; Lago, Renata

; Brito, Paula

; Canguçú-Campinho, Ana Karina

; Barroso, Ubirajara

; Toralles, Maria Betânia Pereira

International braz j urol

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Out 2015, Volume 41 Nº 5 Páginas 975 - 981

Resumo: En | Texto: En | PDF: En

ABSTRACT The term DSD refers to disorders that affect the normal process of sexual development causing disagreement between chromosomal, gonadal and phenotypic sex, and this study aimed to describe the clinical profile of a group with DSD 46, XY joined on DSD Clinic of Hospital of Salvador, Bahia Clinics. It was a retrospective study of medical records of survey data of 93 patients with DSD 46, XY. Among the patients studied 50.5% had no defined etiology and 20.4% had androgen insensitivity syndrome (AIS), 63.4% had been initially recorded in males, 31 (33.3%) in females, being that in two it was necessary to reassignment. All patients with complete AIS pure gonadal dysgenesis and had female genitalia. Others have been diagnosed with genital ambiguity or severe hypospadias and cryptorchidism. The gonads were palpable at the first consultation in 75.3% of patients. It is important to establish an active surveillance program for these patients. The first assessment took place before the age of ten in more than 50% of cases, which shows that much needs to be done for medical education and community about the DSD. Because the phenotypic variability of sexual development disorders was noted that the clinical profile of patients studied ranged between different etiologies, including hindering the diagnostic conclusion of these individuals.

https://doi.org/10.1590/S1677-5538.IBJU.2014.0544 2890 downloads

13.

Presence and duration of anti-Toxoplasma gondii immunoglobulin M in infants with congenital toxoplasmosis
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Lago, Eleonor G.

; Oliveira, Anna Paula

; Bender, Ana Lígia

Jornal de Pediatria

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Ago 2014, Volume 90 Nº 4 Páginas 363 - 369

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OBJETIVOS: investigar a taxa de positividade para imunoglobulina M anti-Toxoplasma gondii (Toxo-IgM) em recém-nascidos com toxoplasmose congênita, e a idade de negativação desses anticorpos. MÉTODOS: foram incluídos pacientes com toxoplasmose congênita que iniciaram acompanhamento em uma clínica de infecções congênitas entre 1998 e 2009. Os critérios de inclusão foram toxoplasmose congênita detectada por triagem sorológica materna ou neonatal de rotina, confirmação diagnóstica por persistência de imunoglobulina G anti-Toxoplasma gondii com >12 meses e pesquisa de Toxo-IgM no período neonatal. Para o cálculo da frequência de positividade da Toxo-IgM foram excluídos os detectados por triagem neonatal. Para o estudo da época de negativação da Toxo-IgM foram excluídos os pacientes com Toxo-IgM negativa desde o nascimento e aqueles em que não foi possível identificar o mês da negativação. RESULTADOS: entre 28 pacientes detectados por triagem materna, 23 recém-nascidos tiveram Toxo-IgM positiva (82,1%, IC 95%: 64,7-93,1%). Somando-se os 37 pacientes detectados por triagem neonatal, a Toxo-IgM foi positiva no primeiro mês de vida em 60 pacientes e em 51 foi possível identificar a época de negativação. Em 19,6% dos pacientes esses anticorpos já eram negativos aos 30 dias e em 54,9% aos 90 dias. Entre os 65 pacientes incluídos no estudo, 40 (61,5%) apresentaram alguma alteração clínica. CONCLUSÕES: mesmo com métodos de alta sensibilidade, recém-nascidos com toxoplasmose congênita podem ter Toxo-IgM negativa ao nascer. Nos que apresentam esses anticorpos, o período de positividade pode ser bastante fugaz. É importante não interromper o monitoramento dos lactentes com suspeita de toxoplasmose congênita por apresentarem Toxo-IgM negativa.

OBJECTIVES: to investigate the rate of positivity for immunoglobulin M anti-Toxoplasma gondii (Toxo-IgM) in newborns with congenital toxoplasmosis, and the age when these antibodies become negative. METHODS: patients with congenital toxoplasmosis who started monitoring in a congenital infection clinic between 1998 and 2009 were included. Inclusion criteria were routine maternal or neonatal serological screening; diagnostic confirmation by persistence of immunoglobulin G anti-Toxoplasma gondii at age > 12 months, and Toxo-IgM screening in the neonatal period. To calculate the frequency of positive Toxo-IgM, cases detected by neonatal screening were excluded. For the study of the age when Toxo-IgM results became negative, patients with negative Toxo-IgM since birth and those in whom it was not possible to identify the month when the negative result was achieved were excluded. RESULTS: among the 28 patients identified through maternal screening, 23 newborns had positive Toxo-IgM (82.1%, 95% CI: 64.7-93.1%). When adding the 37 patients identified by neonatal screening, Toxo-IgM was positive in the first month of life in 60 patients, and it was possible to identify when the result became negative in 51 of them. In 19.6% of patients, these antibodies were already negative at 30 days of life; and in 54.9%, at 90 days. Among the 65 patients included in the study, 40 (61.5%) had some clinical alteration. CONCLUSIONS: even with high sensitivity methods, newborns with congenital toxoplasmosis can have negative Toxo-IgM at birth. In those who have these antibodies, the positive period may be quite short. It is important not to interrupt the monitoring of infants with suspected congenital toxoplasmosis simply because they present a negative Toxo-IgM result.

https://doi.org/10.1016/j.jped.2013.12.006 4044 downloads

14.

O contexto formativo em uma instituição federal de ensino superior (IFES) em consolidação: visão dos alunos de fisioterapia
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Faria, Karen Nubya

; Nogueira, Ricardo

; Ramos, Maquele Lago

; Neves, Dâmares Ribeiro

; Ribeiro, Camila Lima

; Santos, Ana Paula

Revista Brasileira de Educação Médica

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Mar 2014, Volume 38 Nº 1 Páginas 72 - 78

Resumo: Pt En | Texto: Pt En | PDF: Pt | PDF: En

Este estudo proporciona uma apreciação do perfil dos alunos de Fisioterapia da Universidade Federal dos Vales do Jequitinhonha e Mucuri, apurando possíveis causas de evasão, e analisa as opiniões destes em relação a sua formação e a esta nova Instituição Federal de Ensino Superior (Ifes) em expansão. Trata-se de um estudo observacional descritivo. Participaram 175 alunos. Os dados foram coletados por meio de um questionário com questões abertas, fechadas e do tipo Likert, que abordaram as áreas: pessoal, interpessoal, curso, carreira e institucional. Os alunos da cidade ou região representam 20% dos graduandos, e a renda familiar destes é variada. A maioria dos alunos escolheu estudar nesta Ifes por buscar um ensino superior de qualidade e gratuito. Após a conclusão do curso, 76% dos alunos pretendem fazer pós-graduação. Para a maioria, a estrutura física e o corpo docente são adequados ao aprendizado, mas a prestação de serviços não. Conhecendo as necessidades e expectativas dos alunos, podem-se propor soluções para melhoria e progresso de todos: alunos, curso, instituição e comunidade.

This study sought to provide an assessment of the profile of physiotherapy students at the Federal University of the Valleys of Jequitinhonha and Mucuri, investigating possible causes of student dropouts and analyzing student opinion on the course and a new Federal Higher Education Institution (Ifes) in expansion. It took the form of a descriptive observational study on 175 students. Data was collected via a questionnaire with open, closed and Likert questions, which addressed a range of personal, interpersonal, course, career and institutional topics. Students from the Ifes city or region accounted for 20% of the total and family income was varied. Most students chose to study in the university as they sought high-quality and free higher education, and after completing the course, 76% wished to study post-graduate courses. For most, the physical structure and the faculty foster learning, but the service provision does not. In light of the students' needs and expectations, solutions for improvement and ways to ensure progress for students, the course, the institution and the community may be offered.

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15.

Iron: a versatile element to produce materials for environmental applications
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Teixeira, Ana Paula C.

; Tristão, Juliana C.

; Araujo, Maria H.

; Oliveira, Luiz C. A.

; Moura, Flávia C. C.

; Ardisson, José D.

; Amorim, Camila C.

; Lago, Rochel M.

Journal of the Brazilian Chemical Society

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Set 2012, Volume 23 Nº 9 Páginas 1579 - 1593

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Ferro é um elemento versátil que forma várias fases com diferentes estados de oxidação e estruturas, tais como Feº, FeO, Fe3O4, γ-Fe2O3, α-Fe2O3 e FeOOH. Todas estas fases têm propriedades físico-químicas únicas que podem ser usadas para diferentes aplicações. Neste trabalho, descreve-se o uso de diferentes compostos de ferro, sintéticos e também naturais ou de rejeitos, em aplicações ambientais e tecnológicas. Duas áreas principais de pesquisa são descritas. A primeira é relacionada às estratégias para aumentar a reatividade de fases de ferro pela formação de compósitos Feº/Fe óxido e pela introdução de novos metais na estrutura de óxidos de ferro para promover novas reações superficiais. A segunda área de pesquisa é o uso das propriedades magnéticas de algumas fases de ferro para produzir materiais magnéticos versáteis com aplicações focadas em adsorção, catálise e emulsões.

Iron is a versatile element forming several phases with different oxidation states and structures, such as Feº, FeO, Fe3O4, γ-Fe2O3, α-Fe2O3 and FeOOH. All these phases have unique physicochemical properties which can be used for different applications. In this work, it is described the use of different iron compounds, synthetic and also from natural and waste sources, in environmental and technological applications. Two main research areas are described. The first one is related to strategies to increase the reactivity of Fe phases, mainly by the formation of Feº/iron oxide composites and by the introduction of new metals in the iron oxide structure to promote new surface reactions. The second area is the use of the magnetic properties of some iron phases to produce versatile magnetic materials with focus in adsorption, catalysis and emulsions.

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