Navegando por Autor "Pinheiro-Sant'Ana, Helena Maria"

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A deficiência de vitamina A em crianças no Brasil e no mundo
(Ciência & Saúde Coletiva, 2006-09-12) Milagres, Regina Célia Rodrigues Miranda; Nunes, Lélia Cápua; Pinheiro-Sant'Ana, Helena Maria
O presente artigo expõe, com base em uma revisão de literatura dos últimos dez anos, aspectos relevantes da Deficiência de Vitamina A (DVA) em crianças no Brasil e no mundo. Apresenta a DVA no contexto da deficiência clínica e subclínica, com ênfase na caracterização desta como problema de saúde pública. A DVA foi diagnosticada em crianças de várias regiões do Brasil, principalmente no Sudeste e Nordeste; entretanto, não foram encontrados estudos relativos a sinais clínicos. Mundialmente, as maiores prevalências de DVA foram registradas em países da África como Mali, Etiópia e Nigéria, sendo que os sinais clínicos estiveram presentes, principalmente, em regiões da Ásia e África. Os estudos apontam a DVA como problema de saúde pública em crianças, principalmente nas regiões mais pobres do globo.
Buriti of the cerrado of Minas Gerais, Brazil: physical and chemical characterization and content of carotenoids and vitamins
(Food Science and Technology, 2018-12) Hamacek, Fabiana Rossini; Dellla Lucia, Ceres Mattos; Silva, Bárbara Pereira da; Moreira, Ana Vládia Bandeira; Pinheiro-Sant'Ana, Helena Maria
The fruit species of the Brazilian Cerrado, such as buriti (Mauritia vinifera ), occupy a prominent position in the ecosystem since they contribute to the economic potential of the region and have high nutritional value. We aimed to evaluate the physical characteristics, chemical composition and content of vitamin C, carotenoids, vitamin E and folates in pulp of buriti from the Brazilian Cerrado of Minas Gerais, Brazil. The length, diameter, mass and fruit yield were evaluated. The titratable acidity was determined by volumetric neutralization; pH by potentiometry; soluble solids by refractometry; moisture using an oven; ash using a muffle furnace; proteins by the micro-Kjeldhal method; total dietary fiber by the gravimetric non-enzymatic method and lipids with a Soxhlet extractor. Vitamin C and carotenoids were analyzed by high performance liquid chromatography with detection by diode array (HPLC-DAD) and vitamin E and folates by HPLC with fluorescence detection. Buriti pulp showed 12.13 g.100g -1 of lipids and 74.86 g.100g-1 of moisture. Also, the fruit showed high content of dietary fiber, carotenoids, vitamin C, vitamin E and folates. Buriti can contribute to the adequate intake of fiber and vitamins and to preventing the incidence of disorders, especially those more frequent in native populations of the Cerrado.
Extruded sorghum consumption associated with a caloric restricted diet reduces body fat in overweight men: A randomized controlled trial
(Food Research International, 2019-05) Cardoso, Leandro de Morais; Anunciação, Pamella Cristine; Alfenas, Rita de Cássia Gonçalves; Queiroz, Valéria Aparecida Vieira; Carvalho, Carlos Wanderlei Piler; Martino, Hércia Stampini Duarte; Pinheiro-Sant'Ana, Helena Maria
This study aimed to evaluate the effect of sorghum intake on body composition and metabolic variables in overweight men. In a randomized controlled crossover study, 24 overweight men (25.6 ± 4.6 years) were randomly allocated into one of two treatments: extruded sorghum or extruded wheat. The study consisted of 2 periods of 8 weeks with at least 4 weeks of washout. Anthropometric, clinical and metabolic risk variables were assessed at baseline and at the end of each intervention period. Extruded sorghum consumption reduced body fat percentage and increased daily carbohydrate and dietary fiber intake when compared to wheat consumption. Also, sorghum increased the serum glutathione peroxidase concentration, but no difference was observed when compared to wheat consumption. Extruded sorghum demonstrated to be a good alternative to control obesity in overweight men.
Fortification of industrialized foods with vitamins
(Revista de Nutrição, 2006-03) Liberato, Selma Coelho; Pinheiro-Sant'Ana, Helena Maria
Vitamins are essential to life. Inadequate eating habits, high caloric intake and metabolic defects lead to micronutrient deficiencies, affecting more than two billion people worldwide. The increasing intake of industrialized foods, combined with low vitamin stability has led to the common practice of adding these nutrients to processed foods. This review discusses the terminology, availability, intake and risk of hypervitaminosis, due to the intake and nutritional importance of foods fortified with vitamins. The addition of nutrients should occur in foods that are effectively consumed by the target population and must meet the real needs of a significant segment of the population. In Brazil, a total of 166 products available in supermarkets are vitamin-enriched. A 10-year study involving children and adolescents in Germany showed that 90% of those surveyed used at least one fortified food. During this 10-year period, 472 fortified products were consumed. The enrichment of foods should be based on the needs of each country and, if possible, regional needs. For instance, in order to increase its intake, Vitamin D is added to foods in Denmark during the winter, mainly for the elderly. However, in Brazil, there is no evidence of the need to fortify food with this vitamin. A survey showed that of the 76 enriched dairy products, 37 contained vitamin D. Food-fortification is a very important strategy to solve nutritional deficiency problems, but it can also cause many health problems.
A high fat diet does not affect the iron bioavailability in Wistar rats fed with chia and increases gene expression of iron metabolism proteins
(Food & Function, 2016) Silva, Bárbara Pereira da; Matyelka, Jéssika Camila da Silva; Moreira, Maria Eliza de Castro; Toledo, Renata Celi Lopes; Lucia, Ceres Mattos Della; Pinheiro-Sant'Ana, Helena Maria; Martino, Hércia Stampini Duarte
This study evaluated the effect of chia on the iron bioavailability and gene expression of proteins involved in iron metabolism in animals fed with a high fat diet and a standard diet. Four experimental groups were tested (n = 8): standard diet + ferrous sulfate (SD + FS), standard diet + chia (SD + C), high fat diet + ferrous sulfate (HFD + FS), high fat diet + chia (HFD + C). The hemoglobin gain, hemoglobin regeneration efficiency, biological relative value of HRE, serum ferritin and transferrin, liver iron concentration and gene expression of proteins were evaluated. The SD + C group showed lower transferrin expression when compared to the control group. The control group showed serum transferrin concentration higher than the other groups. Serum ferritin and liver iron concentration did not differ among the animals that received chia ferritin and hephaestin expression was lower in experimental groups when compared with the control group. The peroxisome proliferator activated receptor expression was higher in animals fed with SD + C than in the control group. The expression of duodenal cytochrome B and divalent metal transporter 1 in the HFD + C group was higher and ferroportin was lower in the groups containing chia. Animals fed with chia showed similar iron bioavailability compared to animals fed with ferrous sulfate.
Otimização de método para análise de folatos em hortaliças folhosas por cromatografia líquida de alta eficiência com detecção por fluorescência
(Química Nova, 2010-08-23) Lucia, Ceres Mattos Della; Silva, Elizangela Rodrigues da; Ribeiro, Sônia Machado Rocha; Pinheiro-Sant'Ana, Helena Maria; Brandão, Sebastião César Cardoso
We optimized a method for the determination of three main folate isoforms in leafy vegetables. Analysis was carried out by HPLC, using gradient of elution and fluorescence detection. Limits of quantification were 2 ng/mL; 2 ng/mL and 28 ng/mL for tetrahydrofolate (THF), 5-methyltetrahydrofolate (5-MTHF) and 5-formyltetrahydrofolate (5-FTHF), respectively. Recovery rates of THF, 5-MTHF and 5-FTHF varied from 87.86 to 100.64%; 88.12-94.22% and 89.82-106.69%, respectively. Test of repeatability showed relative standard deviation for peak areas lower than 10%. Tests for linearity showed high coefficients of determination. The results showed advances in folates extraction and analysis in raw and cooked leafy vegetables.
Perdas de vitamina C em hortaliças durante o armazenamento, preparo e distribuição em restaurantes
(Ciência & Saúde Coletiva, 2007-07-27) Moraes, Flávia Aparecida; Cota, Alessandra Miranda; Campos, Flávia Milagres; Pinheiro-Sant'Ana, Helena Maria
O objetivo deste estudo foi avaliar perdas de vitamina C após etapas de manipulação de hortaliças, recepção, rmazenamento, preparo e distribuição, em restaurante institucional e comercial. Utilizou-se sete hortaliças: alface, cenoura, chicória, couve, couve-flor, repolho e tomate. A análise da vitamina C foi realizada por cromatografia líquida de alta eficiência (CLAE). As perdas cumulativas de vitamina C foram elevadas nas hortaliças preparadas nos restaurantes institucional e comercial, correspondendo a 44,38% a 67,03% e 32,90% a 71,32%, respectivamente. Nos dois restaurantes, o armazenamento foi responsável pela perda mais expressiva de vitamina C na maioria das hortaliças. Sugere-se adoção de medidas para controlar as perdas de vitamina C nas hortaliças, como compra e recepção de acordo com a demanda; armazenamento em temperatura de refrigeração; monitoramento do tempo de higienização e sanitização; fatiamento próximo ao horário de servir; cozimento preferencialmente a vapor, por pressão ou refogado; monitoramento do tempo e temperatura de cocção; controle do tempo de exposição entre as etapas de preparo e distribuição. Os resultados obtidos para o conteúdo de vitamina C contribuem para caracterização nutricional das hortaliças, pois trabalhos nesta área são insuficientes no Brasil e no mundo.
Phenolic compounds profile in sorghum processed by extrusion cooking and dry heat in a conventional oven
(Journal of Cereal Science, 2015-09) Pinheiro, Soraia Silva; Cardoso, Leandro de Morais; Carvalho, Carlos Wanderlei Piler de; Queiroz, Valéria Aparecida Vieira; Menezes, Cícero Beserra de; Moreira, Ana Vládia Bandeira; Barros, Frederico Augusto Ribeiro de; Awika, Joseph M.; Martino, Hércia Stampini Duarte; Pinheiro-Sant'Ana, Helena Maria
Sorghum (Sorghum bicolor L.) is a gluten-free cereal that has the highest content of phenolic compounds among cereals. It needs to be processed prior to use for human consumption, which may change its antioxidant profile. The knowledge on the effects of extrusion and dry heat in a conventional oven on flavones, flavanones, and proanthocyanidins is limited. Thus, the content and stability to dry heat in a conventional oven (DHCO) and extrusion cooking on phenolic compounds profile in sorghum genotypes were evaluated. Flavanones and flavones decreased after extrusion cooking (100%) and DHCO (31.7–61.6%). The 3-deoxyanthocyanidins were stable in DHCO but were susceptible to extrusion cooking (70.7–93.9%). Proanthocyanidins were identified only in the genotype SC391 and were reduced after both treatments (DHCO: 39.2% and extrusion cooking: 52.1%). Phenols decreased in the genotype SC319 submitted to DHCO (8.3%) and in all extruded genotypes (13.6–14.9%). The DHCO increased the antioxidant capacity in all genotypes, whereas extrusion cooking reduced antioxidant capacity in only two genotypes. In general, differential stability of the major flavonoids in sorghum was observed under DHCO and extrusion cooking, implying that different processing techniques can be selected to
Study of the physical and physicochemical characteristics of fruits of the licuri palm (Syagrus coronata (Mart.) Becc.) found in the Atlantic Forest of Minas Gerais, Brazil
(Food Science and Technology, 2015-07) Paula Filho, Galdino Xavier de; Barreira, Tibério Fontenelle; Rodrigues, Vívian Cristina da Cruz; Martino, Hércia Stampini Duarte; Pinheiro-Sant'Ana, Helena Maria; Cardoso, Leandro de Morais
The Atlantic Forest has species of native fruits, consumed fresh and processed, which have an important contribution to food sovereignty of families that consume it. This study examined the physical and physicochemical characteristics, proximate composition, concentration of carotenoids, vitamin C, vitamin E and minerals in the pulp and kernels of fruits of licuri (Syagrus coronata (Mart.) Becc.). Titratable acidity was analyzed by volumetric neutralization, soluble solids by refractometry, proteins by the micro-Kjeldahl method, lipids by gravimetry using soxhlet, dietary fiber by non-enzymatic gravimetry, carotenoids and vitamin C by HPLC-DAD, vitamin E by HPLC-fluorescence, and minerals by ICP-AES. Pulp were a source of Zn (0.95 mg 100–1), a good source of fiber (6.15 g 100–1), excellent source of provitamin A (758.75 RAE 100–1), Cu (0.69 mg 100–1), Fe (3.81 mg 100–1), Mn (3.40 mg 100–1) and Mo (0.06 mg 100–1). The kernel were a source of Fe (3.36 mg 100–1) and excellent source of Mn (6.14 mg 100–1), Cu (0.97 mg 100–1) and Mo (0.07 mg 100–1). The nutritional value and wide availability of licuri fruit make it an important resource for reducing food insecurity and improving nutrition of the rural population and other individuals who have access to it.
Tocoferois e tocotrienois em óleos vegetais e ovos
(Química Nova, 2009) Milagres, Regina Célia Rodrigues Miranda; Pinheiro-Sant'Ana, Helena Maria; Chaves, José Benício Paes; Guinaz, Michele
The distribution and content of vitamin E isomers was investigated in vegetable oils and raw and cooked egg yolk in commercial restaurants. The analysis of the eight vitamin E isomers was carried out by High Performance Liquid Chromatography (HPLC) with fluorescence detection. The tocopherol and tocotrienol composition of foods varied considerably. Tocopherols were detected in greater quantity and frequency. The α-tocopherol predominated in egg yolks and olive oil while γ-tocopherol was found in high quantities in soybean and canola oils. Cooking did not cause major losses for most of the vitamin E isomers in egg yolks.