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Search Results: 1 - 10 of 22410 matches for " Neuza;GON?ALVES "
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COMPORTAMENTO DO óLEO DE GIRASSOL COM ALTO TEOR DE áCIDO OLéICO EM TERMOXIDA??O E FRITURA
JORGE, Neuza;GONALVES, Lireny Aparecida Guaraldo;
Ciência e Tecnologia de Alimentos , 1998, DOI: 10.1590/S0101-20611998000300015
Abstract: sunflower seed oils with different levels of oleic acid were investigated under temperature of frying conditions to evaluate their thermal and oxidative stability. the behavior of the oils was analysed on their contents of polar compounds, minor glyceridic compounds, triglyceride composition, induction time at 100oc and a -tocopherol levels. the results indicated lower polar compounds contents in high oleic sunflower oil than in normal sunflower oil. the results also showed an increase on total polar compounds mainly related on high molecular weight compounds, polymers, dimers and oxidized triglycerides monomers as thermal and oxidative reaction products. in contrast, the contents of diglycerides and free fatty acids, indicatives of the hydrolytic alteration, remain constant, once there was no moisture in the medium. the quantitative loss of the triglyceride composition was dependent on their insaturation degree and it was higher in triglycerides that contain two or three molecules of linoleic acid. the normal sunflower oil showed, in all experiments, a higher tendency to the polymerization, a higher degree of total alteration and a higher loss on its major triglycerides that on high oleic sunflower oil. in general, the results showed an excellent behavior of the high oleic sunflower oil related to the thermoxidation, independently of the heating type and to the discontinuous frying. such results demonstrated that its thermal and oxidative stability was related on its low content of polyunsaturated fatty acids and high contents of oleic acid and triolein.
COMPORTAMENTO DO óLEO DE GIRASSOL COM ALTO TEOR DE áCIDO OLéICO EM TERMOXIDA O E FRITURA
JORGE Neuza,GONALVES Lireny Aparecida Guaraldo
Ciência e Tecnologia de Alimentos , 1998,
Abstract: óleos de sementes de girassol com diferentes níveis de ácido oléico foram utilizados sob condi es de termoxida o e fritura para avaliar o comportamento do óleo de girassol com alto teor de ácido oléico quanto ao seu grau de insatura o quando comparado com o óleo de girassol convencional. Os métodos analíticos aplicados incluíram a determina o de compostos polares totais, quantifica o de compostos glicerídicos menores, quantifica o da composi o triglicerídica, período de indu o a 100oC e níveis de a -tocoferol. Os resultados para compostos polares totais apresentaram menores valores em óleo de girassol com alto teor de ácido oléico quando comparados com óleo de girassol convencional. Quanto à distribui o dos compostos glicerídicos menores, verificou-se, de modo geral, que o aumento dos compostos polares totais estava relacionado essencialmente aos compostos de maior peso molecular, isto é, polímeros, dímeros e triglicerídios oxidados, os quais s o representantes das altera es térmica e oxidativa. Já os diglicerídios e ácidos graxos, indicativos da altera o hidrolítica, permaneceram praticamente nos níveis originais; uma vez que a umidade n o se encontrava presente no meio. A perda quantitativa da composi o triglicerídica dependeu do grau de insatura o do triglicerídio, sendo mais elevada em triglicerídios que contêm duas ou três moléculas de ácido linoléico. Em todos os casos, o óleo de girassol convencional teve uma maior tendência à polimeriza o, um maior grau de altera o total e uma maior perda de triglicerídios majoritários que o óleo de girassol com alto teor de ácido oléico. Assim, dentre os óleos utilizados neste estudo, os resultados mostraram um excelente comportamento do óleo de girassol com alto teor de ácido oléico em rela o à termoxida o, independente do tipo de aquecimento e à fritura descontínua. Tais resultados demonstraram que sua resistência à altera o termoxidativa estava relacionada com seu baixo teor em ácidos graxos polinsaturados e alto teor em ácido oléico e trioleína.
Varia??o nos hábitos alimentares da mosca de estábulos Stomoxys calcitrans L
Gonalves, Neuza Maria Ferraz de Mello;Veiga, L. A. S.;
Brazilian Archives of Biology and Technology , 1998, DOI: 10.1590/S1516-89131998000300011
Abstract: during the course of a study on the behaviour, of stomoxys calcitrans a research on the feeding habits of this fly was carried out. a total of 27l4 flies were caught in three poultry ranches from araucária, paraná. the source of the flie's sucked blood has been established by precipitin test. . the results showed that although almost all the flies usually feed mammal blood, some of them gave positive precipitin test for birds blood. although all flies were caught on poultry ranches, none had feed on chickens but 2,7% of the total had feed on ducks, 0.7% on geese and 0.37% on turkeys.
The protective effect of methylene blue in lungs, small bowel and kidney after intestinal ischemia and reperfusion
Greca, Fernando Hintz;Gonalves, Neuza Maria Ferraz de Mello;Souza Filho, Zacarias Alves de;Noronha, Lúcia de;Silva, Ruy Fernando Kuenzer Caetano da;Rubin, Michel Risnic;
Acta Cirurgica Brasileira , 2008, DOI: 10.1590/S0102-86502008000200007
Abstract: purpose: to study the role of methylene blue as an inhibitor of superoxide production by xanthine oxidase. methods: thirty-two wistar rats were divided into 2 groups of 16 animals: the control group and the experimental group. all were submitted to a laparotomy for the occlusion of the cranial mesenteric artery during 60 minutes. the reperfusion was confirmed by the pulsation of the artery after the release of the temporary ligature and color change of the intestines. in the animals of the control group, 2 ml of saline were injected in the peritoneal cavity and in the animals of the experimental group, 2 ml of methylene blue were injected in the peritoneal cavity. after reperfusion for 4 hours, the animals were then sacrificed. the lungs were excised from all 32 rats. simultaneously, the small intestine and kidneys were ressected in 20 animals (10 from the control group and 10 from the experimental group). samples of the organs were taken to evaluate the action of xanthine-oxidase, for histopathology studies and for characterization of the edema. results: in the animals of the experimental group, the inflammatory lesion as well as the edema in the lung was greater than in the control group. the intestinal and renal lesions were similar in both groups, but the lung damage was superior to that observed in the intestines and kidneys. . conclusion: despite similar action of the xanthine oxidase in the control and the experimental group, after intestinal ischemia and reperfusion, the protective effect of methylene blue was observed only in the lungs of the experimental group.
A influência do azul de metileno na preven??o da les?o pulmonar após isquemia-reperfus?o intestinal
Greca, Fernando Hintz;Gonalves, Neuza Maria Ferraz de Mello;Souza Filho, Zacarias Alves de;Silva, Ant?nio Pádua Gomes da;Mima, Wilson Hiroshi;Mima, Humberto Hideki;
Acta Cirurgica Brasileira , 2004, DOI: 10.1590/S0102-86502004000400013
Abstract: purpose: to study the role of methylene blue as an inibitor of superoxide production by xantine oxidase. methods: thirty two wistar rats were divided in 2 groups of 16 animals: the control group and the experimental group. all the animals were submitted to a laparotomy for the occlusion of the cranial mesenteric artery during 60 minutes. the reperfusion was confirmed by the 'pulsation of the artery after releasing the temporary ligature. in the animals of the control group, 2 ml of saline were injected in the peritoneal cavity and in the animals of the experimental group 2 ml of methylene blue were injected in the peritoneal cavity. after reperfusion for 4 hours, the animals were sacrificed. the lungs were excised for histological studies, for evaluation of the pulmonary edema and the activity of xantine oxidase. results: in the animals of the experimental group the inflammatory lesion of the lung was grater in the control group as well as the edema. the activity of the xantine oxidase was similar in both groups. conclusion: in rats, methylene blue can protect the lung against the toxic effects of oxygen radical in ischemia-reperfusion injuries.
Situa??o epidemiológica da leishmaniose visceral, na Ilha de S?o Luís, Estado do Maranh?o
Silva, Antonio Rafael da;Tauil, Pedro Luiz;Cavalcante, Maria Neuza Souza;Medeiros, Maria Nilza;Pires, Benedito Nascimento;Gonalves, Eloísa da Gra?a do Rosário;
Revista da Sociedade Brasileira de Medicina Tropical , 2008, DOI: 10.1590/S0037-86822008000400007
Abstract: the results from a field study on autochthonous visceral leishmaniasis on the island of s?o luís are presented. this study started in 2004 and finished in 2006 and had the aim of ascertaining the determinant epidemiological and clinical characteristics of this endemic disease. two hundred ninety nine autochthonous cases were analyzed, of which 83.6% were children younger than 9 years old and 54.1% were male. the disease occurred in all months of the year, with a peak in june. the coefficient of incidence decreased from 46.1 to 35.2 cases per 100,000 inhabitants over the years studied. the diagnosis was confirmed by laboratory tests in 93.3% of the cases. the treatment of choice was based on n-methylglucamine, with a cure rate of 96.1%. the mean lethality rate was 3.7%. because of the absence of systematic control actions, the authors propose the creation of a specific program to be developed by the municipalities under the coordination of the state department of health.
Efeitos dos óleos de amendoim, a?afr?o e oliva na composi??o corporal, metabolismo energético, perfil lipídico e ingest?o alimentar de indivíduos eutróficos normolipidêmicos
Sales, Regiane Lopes;Costa, Neuza Maria Brunoro;Monteiro, Josefina Bressan Resende;Peluzio, Maria do Carmo Gouveia;Coelho, Sandra Bragan?a;Oliveira, Cristiane Gonalves de;Mattes, Richard;
Revista de Nutri??o , 2005, DOI: 10.1590/S1415-52732005000400006
Abstract: objective: the present study aimed at evaluating the effects of peanut, safflower and olive oils on the lipid profile, body composition and satiety of eutrophic, normolipidemic subjects. methods: thirty-two 18 to 50 year-old subjects were recruited and randomly divided into four groups, each with 4 men and 4 women. one group received no treatment and the others received a milk shake for their breakfast, containing an amount of one of the oils (peanut, safflower or olive) equivalent to 30% of their basal energy metabolism, for a period of 8 weeks. the levels of total blood cholesterol and fractions, triacylglycerols, body weight, body composition, basal metabolic rate, dietary induced thermogenesis, satiety and food intake were evaluated on the basal, 4th and 8th weeks. results: no significant difference was observed in the lipid profile or satiety, but the safflower oil group showed lower levels of blood lipids. oil intake, irrespective of its composition, led to an increase in body weight, and olive oil consumption increased the hip circumference. conclusion: contrary to reports in the literature, the addition of oils to the diet increased body fat deposition, and had no effect on blood lipid profile or satiety. the use of oil to substitute other energetic nutrients of the diet should be investigated in future studies, with a larger number of volunteers and a longer period of intervention.
Estresse oxidativo: conceito, implica??es e fatores modulatórios
Barbosa, Kiriaque Barra Ferreira;Costa, Neuza Maria Brunoro;Alfenas, Rita de Cássia Gonalves;De Paula, Sérgio Oliveira;Minim, Valéria Paula Rodrigues;Bressan, Josefina;
Revista de Nutri??o , 2010, DOI: 10.1590/S1415-52732010000400013
Abstract: there is evidence that oxidative stress, defined as a persistent imbalance between the production of highly oxidative compounds and antioxidant defenses, leads to tissue damage. oxygen metabolism generates free radicals and/or non-radical reactive oxygen species. the mitochondria, through the electron transport chain, are the main generator of these species. the antioxidant defense system has the function of inhibiting and/or reducing the damage caused by the deleterious free radicals and/or non-radical reactive oxygen species. this system is divided into enzymatic (superoxide dismutase, catalase and glutathione peroxidase), and nonenzymatic. the nonenzymatic system consists of a variety of antioxidant substances, which may be endogenous or dietary. this study proposed to review the main mechanisms of reactive oxygen species generation and the role of the most relevant agents of the antioxidant defense system on the biomarkers of oxidative stress. the main exogenous factors that modulate oxidative stress will also be discussed.
índices dietéticos para avalia??o da qualidade de dietas
Volp, Ana Carolina Pinheiro;Alfenas, Rita de Cássia Gonalves;Costa, Neuza Maria Brunoro;Minim, Valéria Paula Rodrigues;Stringueta, Paulo César;Bressan, Josefina;
Revista de Nutri??o , 2010, DOI: 10.1590/S1415-52732010000200011
Abstract: the relation between diet and health can be evaluated by the level of some food components (nutrients), kinds of food, group or food groups and eating patterns. the association between these parameters and some chronic diseases can be examined by dietary instruments of global diet assessments and some indices have been considered for this end. the aim of this work was to describe the different indices for assessing diet quality, including the index of nutrients, dietary variety score, dietary diversity score, diet quality index, healthy eating index, diet quality index revised, alternative healthy eating index, recommended food score, alternative mediterranean diet score, as well as their derivations. these indices show an improvement in the concept of quality, emphasizing the functional properties of food components related to risk reduction of the most prevalent diseases nowadays.
Stress prevention by modulation of autonomic nervous system (heart rate variability): A preliminary study using transcranial direct current stimulation  [PDF]
Eduardo Manuel Gonalves
Open Journal of Psychiatry (OJPsych) , 2012, DOI: 10.4236/ojpsych.2012.22016
Abstract: Introduction: Transcranial Direct Current Stimulation (tDCS) is a non-invasive, technique for brain stimulation. Anodal stimulation causes neuronal depolarisation and long-term potentiation, while cathodal stimulation causes hyperpolarisation and long-term depression. Stressors are associated with an increase in sympathetic cardiac control, a decrease in parasympathetic control, or both. Associated with these reactions is a frequently reported increase in Low Frequency (LF) Heart Rate Variability (HRV), a decrease in High Frequency (HF) power, and/or an increase in the LF/HF ratio. Objectives and aims: The present work aims to explore the tDCS potential in the modulation of the Autonomic Nervous System (ANS), through indirect stimulation of Anterior Cingulate Cortex (ACC). Methods: Two subjects, a 39 year old female and a 49 year old male, gave informed consent. Saline soaked synthetic sponges involving two, thick, metalic (stainless steel) rectangles, with an area of 25 cm2 each have been used as electrodes, connected to Iomed Phoresor II Auto device. It has been delivered a 2 mA current, for 20 minutes, over the left Dorsolateral Prefrontal Cortex (DLPFC) (Anode). Spectrum analysis (cStress software) of HRV has been performed before and after tDCS administration. Results: The female/male subject results of LF power, HF power and LF/HF ratio, before tDCS administration, were, respectively: 50.1 nu/60 nu, 46.1 nu/21.7 nu and 1.087/2.771; and, after tDCS administration, respectively: 33.5 nu/52.7 nu, 47.6 nu/ 22.8 nu and 0.704/2.312. Conclusions: tDCS over the left DLPFC (left ACC) increased parasympathetic activity and decreased sympathetic activity, suggesting the importance of tDCS in the management of stress-related disorders.
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