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- ItemSomente MetadadadosAbsence of oxytocin in the central nervous system of the snake Bothrops jararaca(Springer, 2006-11-01) Lazari, Maria de Fatima Magalhaes [UNIFESP]; Alponti, Rafaela Fadoni; Freitas, Thalma Ariani; Breno, Maria Cristina; Conceição, Isaltino Marcelo da; Silveira, Paulo Flavio; Inst Butantan; Universidade Federal de São Paulo (UNIFESP)We used four complementary techniques to investigate the presence of oxytocin peptide in the hypophysis and brain of the snake Bothrops jararaca. A high-pressure liquid chromatographic analysis failed to show oxytocin in extracts of hypophysial and brain tissues but provided estimative values of the amounts of vasotocin (12 ng/mg hypophysis and 0.5 ng/mg brain) and mesotocin (500 pg/mg hypophysis and 8 pg/mg brain). Western blots with a polyclonal anti-oxytocin antibody failed to detect oxytocin in both tissues but detected compounds with higher molecular weight than oxytocin, as well as a relatively weak cross-reactivity with mesotocin. the reverse transcription-polymerase chain reaction analysis failed to detect the expression of oxytocin gene transcript, but detected a transcript related to the mesotocin-neurophysin precursor in both tissues. Immunohistochemistry with the same anti-oxytocin antibody detected strong staining in the neurohypophysis and in few fibers in the inner zone of the median eminence, which was not abolished by pre-adsorption of this antibody with oxytocin, vasopressin, vasotocin or mesotocin and might not be attributed to oxytocin. in conclusion, our data demonstrate the absence of oxytocin in the central nervous system of the snake B. jararaca and underline the pitfalls that can result from the use of a single technique to investigate the presence of peptides in tissues.
- ItemAcesso aberto (Open Access)Análise de especiação de mercúrio em amostras congeladas de peixes amazônicos e tubarões empregando técnicas cromatográficas e ICP-MS(Universidade Federal de São Paulo, 2023-10-27) Barros, Matheus de Lima Ribeiro [UNIFESP]; Nascimento, Angerson Nogueira do [UNIFESP]; Cappelini, Luciana Teresa Dias; http://lattes.cnpq.br/2797378381303427; http://lattes.cnpq.br/6172517093430235; http://lattes.cnpq.br/5088524209332456A ingestão de peixes e produtos derivados da pesca estão intimamente relacionados com significativa melhora na saúde e na prevenção de doenças cardiovasculares, visto que estes alimentos são ricos em diversas vitaminas, minerais e ácidos graxos indispensáveis. Entretanto, a crescente poluição de rios e oceanos alteram a qualidade do pescado, já que elementos tóxicos como o mercúrio (Hg) podem ser bioacumulados por diversas espécies, principalmente peixes das regiões amazônicas (devido à intensa exploração garimpeira na região) e tubarões (animais topo de cadeia alimentar que agregam metais pesados de espécies menores que consomem). Neste contexto, o presente estudo objetiva identificar e quantificar espécies moleculares de mercúrio em carnes de tubarão e de peixes amazônicos consumidos no mercado nacional. Realizou-se o procedimento experimental de preparo da amostra empregando processos de liofilização, moagem, digestão total ácida assistida por micro-ondas e análise por ICP-MS, para determinação da concentração total de Hg nos pescados. As amostras in natura de Pirarucu apresentaram concentrações médias de Hg total entre 0,73 ± 0,01 mg/kg e 0,47 ± 0,01 mg/kg, já para as amostras de Cação foi obtido concentrações de 3,29 ± 0,31 mg/kg e 2,38 ± 0,12 mg/kg. Todas as amostras, exceto uma de Pirarucu, apresentaram valores acima dos impostos pela legislação, o que permite concluir que a ingestão dos pescados analisados apresenta risco à saúde humana. Para extração do metilmercúrio, utilizou-se solução extratora de 1% (m/v) L-cisteína·HCl·H2O combinada com agitação e aquecimento da amostra. A melhor condição obtida nas análises cromatográficas foi utilizando solução de 0,1% (m/v) L-cisteína + 0,1% (m/v) L-cisteína·HCl·H2O, no modo isocrático, sendo possível identificar o pico cromatográfico correspondente ao composto, com tempo de retenção próximo de 6 minutos. Os resultados da análise de especiação sugerem que o método proposto não alcançou os critérios exigidos para a quantificação do MeHg.
- ItemAcesso aberto (Open Access)Aplicação da cromatografia a líquido em substituição à técnica de radioimunoensaio como auxílio diagnóstico visando ao gerenciamento de resíduos de serviço da saúde em laboratório de pesquisa(Sociedade Brasileira de Endocrinologia e Metabologia, 2008-10-01) Ribeiro Neto, Luciane M. [UNIFESP]; Sugawara, Eduardo K. [UNIFESP]; Verreschi, Ieda Therezinha do Nascimento [UNIFESP]; Universidade Federal de São Paulo (UNIFESP)Designing a Health Care Service Waste Management Plan, according to the RDC 306 rules, is a responsibility of all those who produce such waste. Since radioimmunoassay (RIA) is one of the most employed techniques, we studied the impact of replacing this technique by liquid chromatography (HPLC) with regard to the reduction of the radioactive residues routinely produced by the UNIFESP steroid laboratory. The residues produced by the determination of serum cortisol and 17 α-hydroxyprogesterone were classified, and those belonging to groups B and C were evaluated. We observed that, when RIA is used, chemical residues (group B) and radioactive waste (group C) are produced, whereas HPLC generates only chemical residues. Adequation of these techniques showed to be advantageous, by significantly reducing the time of analysis and mainly by eliminating and/or reducing the generation of radioactive waste, encouraging its application to other methodologies, as well as its adoption by other research units.
- ItemSomente MetadadadosAvaliação do potencial hipoglicêmico dos extratos brutos e neolignanas isoladas de Nectandra leucantha (Lauraceae) em células β pancreáticas(Universidade Federal de São Paulo, 2017-03-17) Ramirez, Pamela Noemy Laura [UNIFESP]; Lago, João Henrique Ghilardi [UNIFESP]; Universidade Federal de São Paulo (UNIFESP)Diabetes mellitus (DM) is characterized by chronic hyperglycemia and disorders in the metabolism of carbohydrates, proteins and lipids. This disease affects a large number of people in the world, and in Brazil the prevalence of DM in adults is concentrated in the southeastern region of the country despite the use of several drugs in the treatment of DM. It is necessary to search for new therapeutic alternatives. In this sense, the search for new molecules with antidiabetic activity has been directed to the natural products. Aiming for the recognition of bioactive metabolites, the hexane and methanol extracts of N. leucantha were obtained. The hexane extract was subjected to chromatographic fractionation, where it was possible to isolate two neolignans: 1,2-dimethoxy-6- [2'-methoxy-4 '- (8'-propenyl) phenoxy] -4- (8-propenyl ) benzene (C1) and dehydrodieugenol B (C2), the structures of these compounds being defined by analysis of the NMR spectra. The antiradicalar power of hexane, methanol and two neolignan extracts was evaluated, where the methanolic extract (EC50 = 5.76 ± 0.20 μg / mL) and neolignan C2 (EC50 = 15.30 ± 0.31 μg / mL) presented higher antiradicalar power. An analytical method was developed capable of quantifying the content of the neolignans present in the hexane extract of the N. leucantha branches, in order to know the amount of these neolignans. In the biological tests for the hexanic and methanol extracts and the neolignans isolated against the INS-1E cell line, the cell viability was first evaluated and the concentrations were chosen: 40 μg / mL for the methanol extract, 37.5 μg / mL for the hexane extract, 25μM for neolignan C1 and 40μM for neolignan C2. It was also evaluated the production of reactive oxygen species (EROs) of the hexane and methanol extracts and the action of extracts and neolignans isolated under conditions of oxidative stress induced by low glucose concentration were evaluated.
- ItemAcesso aberto (Open Access)Cinética da reação de transesterificação do óleo de soja para produção de biodiesel via catálise homogênea(Universidade Federal de São Paulo, 2020-07-27) Bortoletto, Gabriela de Carra [UNIFESP]; Gomes, Eliezer Ladeia [UNIFESP]; Hirata, Gisele Atsuko Medeiros [UNIFESP]; http://lattes.cnpq.br/2450412413273769; http://lattes.cnpq.br/9498016105876208O Brasil possui muitas espécies de vegetais que podem ser utilizadas na produção do biodiesel. A oleaginosa mais produzida no Brasil é a soja, sendo o segundo maior produtor mundial. Pelo fato de ser produzido a partir de fontes renováveis (óleos vegetais, gorduras animais e óleo de microalga) e por apresentar características similares ao diesel, o biodiesel passou a ser de grande interesse. No presente trabalho estudou-se a cinética da reação de transesterificação do óleo de soja via catálise homogênea a fim de se verificar a conversão de triacilglicerol em biodiesel em função do tempo para diferentes temperaturas utilizando metanol e como catalisador o NaOH. Foram realizadas reações em diferentes temperaturas, 35 a 60 °C, de forma a determinar-se os parâmetros cinéticos globais desta reação e acompanhar a evolução da conversão do biodiesel a fim de se verificar como esta variável muda com o tempo. Para a caracterização do óleo de soja e do biodiesel utilizaram-se técnicas físico-químicas como Espectroscopia de Ressonância Magnética Nuclear de Hidrogênio e Cromatografia Líquida de Alta Eficiência (CLAE). A partir dos espectros de RMN 1H foi possível caracterizar o óleo de soja, o biodiesel e os subprodutos da reação, além de se obter a conversão do óleo de soja para cada tempo de reação. Como um dos principais resultados, tem-se a conversão final da reação após 240 min, de 95,0% do óleo de soja em biodiesel na temperatura de 35 °C, 97,4% a 45 °C, 97,7% a 50 °C e 94,0% a 60 oC. Obteve-se resultados coerentes com a literatura para os modelos simplificados supondo-se reações irreversíveis de pseudo-1ª ou 2ª ordem, aplicada para a reação global. O modelo de pseudo-1ª ordem foi o mais coerente em termos de valores e ajustes aos dados experimentais, com um bom ajuste. Para as determinações das energias de ativação utilizando ambos os modelos, para 3 pontos utilizando somente a técnica RMN 1H, obteve-se valores de Eap= 39,78 kJ.mol-1 e k0=4,665.105 min-1 para o modelo de pseudo-1ª ordem e para o modelo pseudo-2ª ordem obteve-se Eap=43,40 kJ.mol-1 e k0=7,107.106min-1. Ambas as técnicas de RMN 1H e CLAE apresentaram resultados coerentes, porém quando combinadas não apresentaram valores precisos.
- ItemAcesso aberto (Open Access)Desenvolvimento de um radioimunoensaio para 21-deoxicortisol sérico e sua potencial aplicação no diagnóstico da hiperplasia adrenal congênita(Sociedade Brasileira de Endocrinologia e Metabologia, 2003-04-01) Tonetto-Fernandes, Vânia [UNIFESP]; Ribeiro-Neto, Luciane M. [UNIFESP]; Verreschi, Ieda Therezinha do Nascimento [UNIFESP]; Fiet, Jean; Vieira, José Gilberto H. [UNIFESP]; Kater, Claudio Elias [UNIFESP]; Universidade Federal de São Paulo (UNIFESP); Hospital Infantil Darcy Vargas Serviço de Endocrinologia Pediátrica; Hôpital Saint Louis Service de Biologie HormonaleSerum 21-deoxycortisol (21DF) has been considered a useful hormonal marker for the diagnosis of congenital adrenal hyperplasia (CAH) due to 21-hydroxylase deficiency (21OHD). Although several radioimmunoassay (RIA) methods for 21DF have been reported, none are commercially available. We developed a RIA adapted for 21DF determination, preceded by ether-extraction and liquid chromatographic separation (HPLC) of samples. The assay was employed to evaluate children (15F/10M) with the classic form of 21OHD and a control group (5F/8M). The antibody obtained, in addition to efficient HPLC separation, permitted tritiated cortisol instead of 21DF to be used, since labeled ³H-21DF is expensive and difficult to obtain. Serum cortisol levels were reduced in patients with 21OHD (48h following therapy withdrawal) as compared to controls (2.1±2.1 vs. 16.2±7.0mug/dl), whereas serum levels of 21DF were significantly elevated (1,359±853ng/dl, ranging from 434 to 3,079) in the former, but consistently below the sensitivity limit of the assay (156ng/dl) in the latter group. The reported method, although devoid of sensitivity for its application in normal subjects, permits 21DF to be quantified in patients with 21OHD, with adequate sensitivity and specificity to diagnose and follow patients with this condition.
- ItemAcesso aberto (Open Access)Desenvolvimento e otimização de método indicativo de estabilidade utilizando a abordagem de Quality by Design (QbD) na determinação de etinilestradiol e levonorgestrel em contraceptivos orais comercializados em território brasileiro(Universidade Federal de São Paulo, 27-08-21) Silva, Fernando Antunes da [UNIFESP]; Calixto, Leandro Augusto [UNIFESP]; Lourenço, Felipe Rebello; http://lattes.cnpq.br/4765923799790267; http://lattes.cnpq.br/3551420764621660; http://lattes.cnpq.br/1519744331578783Os anticoncepcionais são medicamentos utilizados com a finalidade básica de prevenção a gravidez e/ou planejamento familiar. O medicamento composto da associação Etinilestradiol 0,03 mg + Levonorgestrel 0,15 mg é um contraceptivo hormonal do tipo combinado composto por estrogênio e progestogênio. Devido às baixas concentrações de substância ativa, uma preocupação é o surgimento de produtos de degradação ou impurezas nocivas ao organismo humano. Até o presente momento, não há disponível em compêndios oficiais um método analítico que atenda aos critérios da abordagem dos Métodos Indicativos de Estabilidade (MIEs). Desta forma, o presente trabalho teve como objetivo o desenvolvimento e otimização de um MIE utilizando a abordagem de qualidade baseada no projeto (Quality by Design) para aplicação em amostras de contraceptivos orais comercializados em território brasileiro. Para o desenvolvimento analítico, inicialmente, submeteu-se as amostras a um estudo de degradação forçada, e essas foram utilizadas no desenvolvimento e otimização do preparo de amostra e das condições cromatográficas. O MIE apresentou adequada seletividade e eficiência para a determinação dos Insumos Farmacêutivos Ativos (IFAs) e de seus respectivos produtos de degradação, comprovados através das figuras de mérito da validação analítica. Por fim, uma análise do comparativa demonstrou resultados aceitáveis tanto no medicamento recém adquirido como no medicamento submetido a condição de estabilidade acelerada durante o período de 6 meses. O mesmo ensaio comparativo foi realizado para medicamentos similares comercializados em território brasileiro. Este trabalho trouxe melhorias em relação ao desenvolvimento analítico tradicionalmente utilizado, utilizando ferramentas in silico, diminuindo quantidade de experimentos práticos e aumentando o conhecimento teórico das amostras avaliadas de uma forma sistemática, mostrando-se aplicável para análise de teor e produtos de degradação em diferentes formulações contendo a associação das substâncias terapêuticas Etinilestradiol e Levonorgestrel.
- ItemAcesso aberto (Open Access)Desenvolvimento e validação de método analítico para padronização do extrato Mouriri elliptica Martius e avaliação do extrato seco por Spray Dryer.(Universidade Federal de São Paulo, 2018-09-06) Almeida, Rosinês da Silva [UNIFESP]; Andreo, Marcio Adriano [UNIFESP]; Universidade Federal de São Paulo (UNIFESP)The Mouriri elliptica (Melastomataceae) leaves, also known as "croadinha", presented considerable activity in peptic ulcer and gastritis healing. This action was validated by traditional use and confirmed with scientific studies. The majority compounds found in this species are flavonoids myricetin, quercetin and their derivatives. Aiming the use of this species as a phytotherapic medicine, this work standardized the leaves ethanolic extract, quantifying the major compounds for quality control and analyzed the drying process of the extract. Myricetin and quercetin may be possible markers, however, the large number of their glycosidic derivatives present in the extract makes it difficult to quantify them, hydrolysis step is required. The work proposed an optimization of the acid hydrolysis process, using factorial planning complete to investigate the effects of HCl concentration and reaction time. The ideal conditions found were: 2 mol HCl and 40 minutes reaction time. After defining the condition of hydrolysis of flavonoid myricetin and quercetin, was developed and validated a method for the quantification of these compounds. Analyzes by HPLC The developed method presented linearity (R2 = 0,996 for myricetin and R2 = 0,997 for quercetin). Besides, the chromatographic peaks showed good resolution. With other validation data, including precision, specificity and accuracy, this method demonstrated good reliability and sensitivity. This method was applied for quantification of myricetin and quercetin, and the results were: 54 μg/mL myricetin and 12 μg/mL quercetina. Together with the quality control testing the content was determined of 1,52 % myricetin and 0,32 % of quercetin in the ethanolic extract of the leaves of M. elliptica. The drying process of standardized extract was performed in spray dryer, using complete factorial planning 23 . The variables were inlet temperature, % Aerosil and flow. Dry extract samples were subjected to analysis of recovery of flavonoids, yield and moisture. The optimized conditions based on the analysis of desirability were: 160 °C inlet temperature, Aerosil 50% and 2mL/min flow. Obtaining an average content of 14.79 μg / mL myricetin and 3.35 μg / mL quercetin.
- ItemAcesso aberto (Open Access)Desenvolvimento e validação de metodologia para análise de antibióticos empregando a abordagem Analytical Quality by Design (AQbD)(Universidade Federal de São Paulo, 2024-06-07) Silva, Mirelle Lopes da [UNIFESP]; Moraes, Maria de Lourdes Leite de [UNIFESP]; Silva, Heron Dominguez Torres da [UNIFESP]; http://lattes.cnpq.br/2253809699898165; http://lattes.cnpq.br/1133302125160725; https://lattes.cnpq.br/8558985452405338Diante de muitas ameaças crescentes aos ecossistemas aquáticos, uma das mais preocupantes com as quais a humanidade se depara é o surgimento e desenvolvimento de bactérias resistentes a antibióticos. Prescrições inadequadas, automedicação e a própria excreção desses medicamentos geram resíduos que contaminam águas superficiais e subterrâneas, proporcionando condições ideais para o desenvolvimento de bactérias resistentes. Devido às diferentes características dos antibióticos e a baixa concentração destes em matrizes aquosas, o desenvolvimento de técnicas que possibilitem a detecção e quantificação destes compostos não é tarefa fácil. Neste sentido, o objetivo deste trabalho foi desenvolver um método para separar antibióticos de duas diferentes classes (β-lactâmicos e fluoroquinolonas) utilizando cromatografia líquida de alta eficiência acoplada a um detector de arranjo de diodo e a um detector por fluorescência (HPLC UV-DAD/FLD). O desenvolvimento da metodologia foi conduzido empregando os conceitos de Analytical Quality by Design (AQbD). Após selecionado o ATP (Perfil Alvo Analítico) e os fatores que afetam a separação, foi aplicado um desenho experimental do tipo fatorial 23 para otimização da (1) proporção do solvente orgânico na fase móvel, (2) temperatura do forno da coluna e (3) pH da fase aquosa. Ferramentas estatísticas e modelos de regressão foram empregados para a otimização do método. As condições otimizadas foram: Fase móvel: (A) água acidificada com ácido fórmico 0,1% (v/v) pH 3,0; (B) metanol 25%; eluição isocrática; temperatura 40°C. O método desenvolvido apresentou robustez e linearidade (R2 próximo de 1,0). O LOD variou de 0,01-0,23 e o LOQ de 0,04-0,70 µgmL-1. A precisão foi avaliada em 3 níveis (intraday e interday) com um DPR abaixo de 5%. A separação foi obtida em menos de 7 minutos.
- ItemAcesso aberto (Open Access)Determination of free urinary cortisol in cushing's syndrome using reversed-phase high performance liquid chromatography(Sociedade Brasileira de Química, 2010-01-01) Sugawara, Eduardo Kinio [UNIFESP]; Ribeiro Neto, Luciane Maria [UNIFESP]; Verreschi, Ieda Therezinha do Nascimento [UNIFESP]; Universidade Federal de São Paulo (UNIFESP)Determination of free urinary cortisol is a test of choice in the diagnosis of Cushing's syndrome. In this study, cortisol was quantified using reversed-phase high-performance liquid chromatography (RP-HPLC) in urine samples previously extracted with ether and using triamcinolone acetonide as internal standard (IS). A BDS-Hypersil-C18® column, water-acetonitrile (72:28; v/v), with a flow rate of 1.0 mL/min and detection at 243 nm were used. This method showed to be both effective and efficient, with sensitivity and linearity ranging from 2.50 to 150 μg/L, and can be used in substitution to the radioimmunoassay technique within this concentration range.
- ItemSomente MetadadadosDevelopment and validation of a rapid and sensitive LC-ESI-MS/MS method for ondansetron quantification in human plasma and its application in comparative bioavailability study(Wiley-Blackwell, 2010-11-01) Moreira, Roberto F.; Salvadori, Myriam C.; Azevedo, Cristina P.; Oliveira-Silva, Diogo [UNIFESP]; Borges, Diego C.; Moreno, Ronlison A.; Sverdloff, Carlos E.; Borges, Ney C.; Universidade Estadual de Campinas (UNICAMP); ChromAnal MCM Anal Labs; Universidade Federal de São Paulo (UNIFESP); Fac Med; Synchrophar Assessora & Desenvolvimento ProjetosThe validation of a high throughput and specific method using a high-performance liquid chromatography coupled to electrospray (ES+) ionization tandem triple quadrupole mass spectrometric (LC-ESI-MS/MS) method for ondansetron quantification in human plasma is described Human plasma samples were extracted by liquid-liquid extraction (LLE) using methyl tert-butyl ether and analyzed by LC-ESI-MS/MS the limit of quantification was 0 2 ng/mL and the method was linear in the range 0 2-60 ng/mL the intra-assay precisions ranged from 1 6 to 7 7%, while inter-assay precisions ranged from 2 1 to 5 1% the intra-assay accuracies ranged from 97 5 to 108 2%, and the inter-assay accuracies ranged from 97 3 to 107 0% the analytical method was applied to evaluate the relative bioavailability of two pharmaceutical formulations containing 8 mg of ondansetron each in 25 healthy volunteers using a randomized, two-period crossover design the geometric mean and respective 90% confidence interval (Cl) of ondansetron test/reference percent ratios were 90 15% (81 74-99 44%) for C(max) and 93 11% (83 01-104 43%) for AUC(o-t) Based on the 90% confidence interval of the individual ratios (test formulation/reference formulation) for C(max) and AUC(o-inf), , it was concluded that the test formulation is bioequivalent to the reference one with respect to the rate and extent of absorption of ondansetron Copyright (C) 2010 John Wiley & Sons, Ltd
- ItemAcesso aberto (Open Access)Emprego da cromatografia líquida de alta eficiência na determinação de cortisol sérico em substituição à técnica de radioimunoensaio(Sociedade Brasileira de Patologia ClínicaSociedade Brasileira de PatologiaSociedade Brasileira de Citopatologia, 2008-10-01) Sugawara, Eduardo Kinio [UNIFESP]; Ribeiro Neto, Luciane Maria [UNIFESP]; Oliveira, Kelly Cristina de [UNIFESP]; Verreschi, Ieda Therezinha do Nascimento [UNIFESP]; Universidade Federal de São Paulo (UNIFESP)BACKGROUND: The quantification of cortisol in different organic fluids has not only been applied to different human nosological conditions as a diagnostic aid but it has also been used in clinical research. In clinical application, cortisol is routinely measured by radioimmunoassay (RIA). In the determination of free urinary cortisol this technique has been replaced by the high-performance liquid chromatography mainly in the diagnosis of Cushing syndrome. As to serum cortisol determination, there is no evidence of the application of liquid chromatography as a substitute for other analytical techniques. OBJECTIVE: The development of an analytical methodology using reversed-phase high-performance liquid chromatography (RP-HPLC) to determine serum cortisol levels as a substitute for RIA in order to reduce radioactive waste. MATERIAL AND METHODS: Cortisol was directly quantified by RP-HPLC in previously ether-extracted serum samples. Triamcinolone acetonide was used as internal standard (IS). The chromatographic separation was developed in a BDS-Hypersil-C18® column (125 x 4 mm, 5 µm) using water-acetonitrile (72:28; v/v) as mobile phase at 1 ml/min and steroid peaks were measured at 243 nm. RESULTS: Cortisol and IS presented retention time of 3.4 and 7.1 min, respectively. The precision was less than 10% and accuracy was less than 4%. DISCUSSION: The method was effective and efficient, with good sensitivity and linearity in the concentration range of 2.5 to 60.0 µµg/dl. CONCLUSION: The present methodology substitutes RIA at clinical application.
- ItemSomente MetadadadosFruits and vegetables in the Brazilian Household Budget Survey (2008-2009): carotenoid content and assessment of individual carotenoid intake(Academic Press Inc Elsevier Science, 2016) Vargas-Murga, Liliana; Rosso, Veridiana Vera de [UNIFESP]; Mercadante, Adriana Zerlotti; Olmedilla-Alonso, Begona; Universidade Federal de São Paulo (UNIFESP)The beta-carotene, alpha-carotene, beta-cryptoxanthin, lycopene, lutein, zeaxanthin, neoxanthin, violaxanthin concentrations in raw fruits and vegetables were compiled (19 fruits, 24 vegetables, and mixed fruit and salad dishes), using data from foods collected and analyzed in Brazil, by means of high-performance liquid chromatography with diode array detection. The food intake was obtained from the Food Consumption Module of the Household Budget Survey (2008-2009), recorded in 13569 households, representative of all Brazilian regions. Vegetables contributed more to vitamin A intake than fruits (70.3% vs 21.5% retinol equivalents), raw salads, pumpkin, kale and carrot being the main contributors. The mean dietary intakes of fruits (86 g/d) and vegetables (64 gid) did not meet the recommendation of the WHO/ FAO. All food items supplied beta-carotene (0.9 mg/p/d), the major contributors being kale, pumpkin and mango. beta-Cryptoxanthin (0.1 mg/p/d) was mostly supplied by orange, tangerine and papaya"(87.4% of its intake). Lycopene (0.7 mg/p/d) was found only in guava, watermelon and tomato. Lutein (0.8 mg/p/d), violaxanthin and neoxanthin (0.6 and 0.2 mg/p/d, respectively), were mainly supplied by green leafy vegetables and beta-carotene (0.16 mg/p/d) and zeaxanthin (0.06 mg/p/d) by a small number of foods. (C) 2016 Elsevier Inc. All rights reserved.
- ItemSomente MetadadadosQuantitative determination of nadolol in tablets by high-performance liquid chromatography and UV-derivative spectrophotometry(Taylor & Francis Inc, 2008-01-01) Tsubone, Camila [UNIFESP]; Garcia, Pedro Lopez [UNIFESP]; Gomes, Fabio Pereira [UNIFESP]; Maria Kedor-Hackmann, Erika Rosa [UNIFESP]; Rocha Miritello Santoro, Maria Ines [UNIFESP]; Universidade Federal de São Paulo (UNIFESP)High-performance liquid chromatographic (HPLC) and UV derivative spectrophotometric (UVDS) methods were developed and validated for the quantitative determination of nadolol in tablets. the HPLC method was performed on a C18 column with fluorescence detection. the excitation and emission wavelengths were 230 and 300nm, respectively. A mobile phase composed by acetonitrile-water containing 0.1% triethylamine (15:85v/v) and pH adjusted to 4.6 with formic acid was used. the UVDS method was performed taken a signal at 279.5nm. the correlation coefficient (r) obtained for both methods was 0.9999. the proposed methods are simple, precise, accurate, and can be used in routine analysis.
- ItemSomente MetadadadosStress during development alters anxiety-like behavior and hippocampal neurotransmission in male and female rats(Elsevier B.V., 2012-01-01) Barbosa Neto, Jair B. [UNIFESP]; Tiba, Paula A. [UNIFESP]; Faturi, Claudia B. [UNIFESP]; Castro-Neto, Eduardo F. de [UNIFESP]; Naffah-Mazacoratti, Maria da Graca [UNIFESP]; Maria, Jair de Jesus [UNIFESP]; Mello, Marcelo F. de [UNIFESP]; Suchecki, Deborah [UNIFESP]; Universidade Federal de São Paulo (UNIFESP); Universidade Federal do ABC (UFABC)Epidemiological data indicate that early stress increases vulnerability to psychiatric disorders, including anxiety and depression. in the present study we sought to investigate the long-term behavioral and neurochemical consequences of increased and sustained corticosterone levels induced by a 24 h bout of maternal deprivation (DEP) imposed on postnatal day 11 (DEP11). As adults, animals were exposed to the elevated plus maze for assessment of anxiety-like behavior and corticosterone response to this challenge, or decapitated for determination of monoamines and amino acid neurotransmitters content in the hippocampus by HPLC method. the results showed that DEP11 male and female rats displayed increased time in the central hub of the maze and more risk assessment behavior, reflecting increased anxiety-like behavior; in addition, these animals continuously secreted corticosterone in response to the behavioral test until the latest time-point, e.g., 60 min post-stress. in males, maternal deprivation increased aspartate and glutamate levels and reduced taurine levels compared to non-deprived (NDEP) rats. DEP11 females displayed reduced noradrenaline, aspartate and GABA levels compared to NDEP counterparts. These results indicate that maternal deprivation at 11 days of age produced changes in hippocampal neurotransmission that may mediate the increased anxiety-like behavior observed in male and female deprived rats.This article is part of a Special Issue entitled 'Anxiety and Depression'. (C) 2011 Elsevier B.V. All rights reserved.
- ItemSomente MetadadadosUrinary neopterin quantification by reverse-phase high-performance liquid ultraviolet chromatography with detection(Elsevier B.V., 2004-06-30) Castro, M. R. de; Di Marco, G. S.; Arita, D. Y.; Teixeira, L. C.; Pereira, A. B.; Casarini, D. E.; Universidade Federal de São Paulo (UNIFESP)Neopterin plays an important role in the malignant disease diagnostics. However, the methods employed in neopterin determination are generally difficult and/or time consuming. the aim of this work was to standardize a practical method to quantify neopterin using high-performance liquid chromatography-ultraviolet (HPLC-UV) and quantify it in patients with systemic lupus erythematosus (SLE). Urine was collected from healthy subjects (n=49), patients with inactive (n = 15), active (n = 28), and highly active SLE (it = 6). the HPLC was performed using two coupled reverse-phase columns eluted with 150 mM sodium phosphate, pH 4.0, under a flow rate of 0.8 ml/ min, with UV detector set at 353 nm and 100-fold diluted urines. the inter- and intra-assay studies presented an imprecision of 12.5% and 12.9% for quality controls of 3.94 and 1.1 mumol/ml, respectively. Recovery from 79.5% to 82% was observed throughout the assay's linear range. Subjects with active (874.2 +/- 165.3 8 mumol/mol creatinin) and highly active SLE (1753.8 +/- 453.9 mumol/mol creatinin) showed three- and sixfold increased neopterin levels, respectively, compared to subjects with inactive SLE (314.3 mu 121.3 mumol/mol creatinin) and healthy subjects (294.6 +/- 178.6 mumol/mol creatinin) (P > 0.05). Briefly, the proposed method was precise, specific, and reproducible, not invasive and allows the urinary neopterin quantification only with UV detection, (C) 2004 Elsevier B.V. All rights reserved.