Uso de tratamento hidrotérmico e ácido clorídrico na qualidade de lichia 'Bengal'

Fundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP)

Uso de embalagens plásticas e cobertura de quitosana na conservação pós-colheita de lichias

Fundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP)

Aplicação de métodos combinados na conservação da qualidade de lichias ‘Bengal’

Conselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq)

Estudo das interações polifenol-proteína e das reações de escurecimento não-enzimático para o processamento de cajuína

The cashew, a fruit from Brazilian Northeast is used to produce juice due to its flavor and vitamin C richness. However, its acceptance is limited due to its astringency. Cajuína is a derivate product appreciated by its characteristic flavor, freshness and lack of astringency, due to tannin removal. Cajuína is a light yellow beverage made from clarified cashew juice and sterilized after bottling. It differs from the integral and concentrated juice by the clarification and thermal treatment steps. Many problems such as haze and excessive browning could appear if these steps are not controlled. The objective of this work was divided into two stages with the aim to supply process information in order to obtain a good quality product with uniform characteristics (sensory and nutritional). Polyphenol-protein interaction was studied at the clarification step, which is an empirical process, to provide values on the amount of clarifying solution (gelatin) that must be added to achieve a complete juice clarification. Clarification essays were performed with juice dilutions of 1:2 and 1:10 and the effect of metabissulfite and tannic acid addition was evaluated. It was not possible to establish a clarification point. Metabissulfite did not influenced the clarification process however tannic acid addition displaced the clarification point, showing the difficulty visual monitoring of the process. Thermal treatment of clarified juice was studied at 88, 100, 111 e 121 °C. To evaluate the non-enzymatic browning, vitamin C, 5-hidroximetilfurfural (5-HMF) and sugar variation were correlated with color parameters (reflectance spectra, color difference and CIELAB). Kinetic models were obtained for reflectance spectra, ascorbic acid and 5-HMF. It was observed that 5-HMF introduction followed a first order kinetic rate at the beginning of the thermal treatment and a zero order kinetic at later process stages. An inverse correlation was observed between absorbance at 420 nm and ascorbic acid degradation, which indicates that ascorbic acid might be the principal factor on cajuína non-enzymatic browning. Constant sugar concentration showed that this parameter did not contribute directly to the nonenzymatic browning. Optimization techniques showed showed that to obtain a high vitamin C and a low 5-HMF content, the process must be done at 120 ºC. With the water-bath thermal treatment, the 90 °C temperature promoted a lower ascorbic acid degradation at the expense of a higher 5-HMF level

Estrutura do pericarpo e da semente de Astronium graveolens Jacq. (Anacardiaceae) com notas taxonômicas

Fundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP)

Morfoanatomia e ontogênese do pericarpo de Schizolobium parahyba (Vell.) Blake (Fabaceae, Caesalpinioideae)

Conselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq)

Morfoanatomia comparada e ontogênese do pericarpo de Bidens gardneri Baker e B. pilosa L. (Asteraceae)

Fundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP)

Morfoanatomia e ontogênese do pericarpo de Manihot caerulescens Pohl e M. tripartita Müll. Arg. (Euphorbiaceae)

Fundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP)

Aplicação de ciclodextrina glicosiltransferase (CGTase) e de ciclodextrinas como coadjuvante na inibição do escurecimento em alimentos

Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES)

Escurecimento enzimático em frutos: polifenoloxidase de atemóia (Annona cherimola Mill. X Annona squamosa L.)

Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES)

Morfoanatomia do pericarpo, semente, folha de Psychotria hoffmannseggiana (Willd. ex Roem. & Schult.) Müll. Arg. e Psychotria trichophora Müll. Arg., e desenvolvimento morfológico da plântula de Psychotria hoffmannseggiana (Willd. ex Roem. & Schult.) Müll. Arg. (Rubiaceae, Rubioideae, Psychotrieae)

Pós-graduação em Ciências Biológicas (Biologia Vegetal) - IBRC

Morfoanatomia de ovário, pericarpo e semente de sete espécies de Myrteae DC. (Myrtaceae)

Pós-graduação em Ciências Biológicas (Botânica) - IBB

Determinação da atividade antimicrobiana dos extrativos das folhas/galhos, pericarpo e sementes da Crotalaria pallida (Leguminosae)

O estudo de novas alternativas terapêuticas no tratamento de infecções microbianas tornou-se crescente no cenário científico devido à grande variação genética desses micro-organismos, que resultou na resistência aos antimicrobianos existentes. A grande diversidade na flora brasileira e a ampla utilização das plantas como medicamentos pela população justificam os estudos e o crescente interesse pela descoberta de novos compostos bioativos isolados dos vegetais. Plantas usualmente utilizadas na agricultura, apenas como adubação verde, por exemplo, são atualmente alvo de estudos científicos com potenciais promissores de atuação como de produtos terapêuticos. Plantas da família Leguminosae, amplamente conhecidas e utilizadas como fornecedoras de nitrogênio ao solo, vem sendo estudadas por diversas áreas da saúde para comprovarem a ação de compostos isolados entre estes os alcalóides pirrolidizínicos como antiinflamatórios, antibióticos e até como veneno para pragas. O objetivo do presente estudo foi determinar, a partir de extrativos de Crotalaria pallida, a atividade antimicrobiana in vitro utilizando cepas padrões de: Staphylococccus aureus, Escherichia coli, Salmonella sp e da levedura Candida albicans. Para determinação dessa atividade foi utilizada a técnica de diluição em microplaca que possibilitou o estudo da atividade do extrativo vegetal e da concentração inibitória mínima, isto é, concentração bactericida e/ou bacteriostática mínima e concentração fungiostática e/ou fungicida mínima. A Crotalaria pallida, não apresentou atividade frente aos micro-organismos testados nas condições padronizadas neste estudo

Influência do pericarpo no teste de condutividade elétrica em sementes de crambe (Crambe abyssinica HOCHST) submetidas a métodos de secagem.

In this study, we aimed to evaluate the effect of five drying systems on the quality of crambe seed and the influence of the pericarp in its electrical conductivity. The experimental design adopted was randomized blocks with four replications. The following drying methods were applied: drying in the field, on the patio, under shade, with heated air, and non-heated air. To evaluate the electrical conductivity and the fat acidity, the seeds, from the cultivar FMS Brilhante, were analyzed with and without pericarp. . An analysis of variance was performed and the means were compared by Tukey test (p≤0,05). We also performed the Pearson linear correlation between electrical conductivity and fat acidity in order to evaluate the pericarp influence. The 4 drying system using shades cause less damage to the seeds; and the presence of pericarp decreased the sensitivity of the electrical conductivity

Avaliação da toxicidade subcrônica e reprodutiva do extrato seco de pericarpo de passiflora edulis variedade flavicarpa degener em ratos

The pericarp of Passiflora edulis var. flavicarpa Degener is now being investigated for medicine purposes. There are no reports about it toxicity. The aim of the present study was investigate the sub chronic toxicity in male rats and reproductive toxicity in pregnant rats and exposed fetuses of an extract obtained by infusion of the pericarp in water (1:3 m/v;100o C, 10 min). The extract composition was evaluated by tube reactions and thin lawyer chromatography (TLC). Adult male rats (n=8) were treated with 300 mg/kg of the extract, by gavage, during 30 days and pregnant rats (n=7) from gestation day 0 to day 20. Control received tap water (1 mL). Water and food intakes and body weight gain were recorded. At day 29 of treatment the sexual behavior of the males was analyzed and then half of males from each group received cyclophosphamide (50 mg/kg, i.p.) to (anti)genotoxic assessment in bone marrow. At day 30, males were anesthesized for parameters collection. At day 20 of gestation, the dams were anesthesized for reproductive performance evaluation. The fetal analysis was conducted by visceral and skeletal. Phytochemical analysis revealed the presence of flavonoids, unspecific alkaloids, phenols and triterpenic compounds. Statistical analysis revealed absence of significant differences between experimental and control. This study suggest that the aqueous extract obtained from pericarp of P. edulis var. flavicarpa Degener was not able to promote toxic effects in rats. Cytotoxicity was evaluated with the PCE/NCE ratio (NCE=normochromatic erythrocytes). Statistical analysis (mean ± SEM) revealed absence of changes in the frequency of MNPCE (negative control: 3.26±0.42; positive control: 11.72±1.02; negative experimental: 4.02±0.13; positive experimental: 10.47±0.87) or cytotoxicity (negative control: 0.37±0.08; positive control: 0.23±0.05; negative experimental: 0.37±0.07; positive experimental: 0.23±0.02). This study suggests that the extracts showed no (anti)genotoxic and no cytotoxic activities under the experimental conditions.