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	Provedor de dados BJMBR (14) Rev. Microbiol. (3) Scientia Agricola (1) Rev. Bras. Bot. (1) Rev. bras. sementes (1) Autor Bahia-Oliveira,L.M.G. (2) Coffman,R.L. (2) Corrêa-Oliveira,R. (2) Gazzinelli,G. (2) Abreu-e-Silva,F.A. (1) Aliberti,J.C.S. (1) BARBOSA,EDELCILIO (1) Belote,Juliana Gisele (1) Bernoux,Martial (1) Bertho,A.L. (1) Bonato,M. Christina M. (1) Bucaretchi,F. (1) Burity,Hélio Almeida (1) Cançado,J.R. (1) Cassal,A. (1) Cavalcante,D.I.M. (1) Cerri,Carlos Clemente (1) Chamber-Perez,Manuel (1) Chavéz-Olórtegui,C. (1) Collares,E.F. (1) Mais... Palavra-chave /font> (20) FONT FACE=Symbol> (20) A< (9) G< (6) < (3) D< (3) B< (2) -Galactosidase galactosyltransferase galactooligosaccharides lactose prebiotic effect (1) -MSH AV3V ANP natriuresis kaliuresis diuresis (1) -adrenergic receptors prostaglandin E2 arginine citrulline NMMA sodium nitroprusside (1) -amilase amido açúcares proteínas alterações bioquímicas sal (1) -amino N-ureide N-amide Bradyrhizobium (Lupinus) nodule cytosol (1) -blockers vagotomy (1) -hydroxyalkanoate PHA resistance to antibiotics sugarcane agroecosystem vinasse (1) -satellite DNA probes microwave treatment quantitative image analysis (1) -subunit pituitary gonadotropins hypogonadism cirrhosis (1) 13C carbono nitrogênio (1) 13C photosynthetic cycle C3 C4 (1) 2-adrenergic agonist (1) Blood volume expansion gastroduodenal resistance duodenum pylorus !-- $MVD$:face("Symbol") --< (1) Mais... Tipo do documento Info:eu-repo/semantics/article (15) Info:eu-repo/semantics/other (5) Ano 2008 (1) 1999 (7) 1998 (7) 1997 (5) País Brazil (20) Idioma Inglês (18) Português (2)		Ordenar por:  Relevância Autor Título Ano Registros recuperados: 20 Primeira ... 1 ... Última Natural abundance of 13C in tropical grasses from the INPA, Instituto Nacional de Pesquisas da Amazônia, herbarium Rev. Bras. Bot. MEDINA,ERNESTO; MARTINELLI,LUIZ ANTONIO; BARBOSA,EDELCILIO; VICTORIA,REYNALDO LUIZ. The stable carbon isotopic composition of 165 grass species was determined with the objective of verifying their photosynthetic pathway (C3 and C4). The samples, taken from the INPA herbarium, were mainly collected in the North of Brazil. Approximately 60% of the species proved to be of the C4 type, with <FONT FACE="Symbol">d</font> 13C values ranging from -13.6 to -9.5‰, while the remainder 40% belonged to the C3 type, with values ranging from -34.7 to -23.4‰. This relatively high proportion of C3 species is probably due to the high relative humidity of the sites where the species were collected. Tipo: Info:eu-repo/semantics/article Palavras-chave: Grasses Amazon <; FONT FACE=Symbol>; D<; /font>; 13C photosynthetic cycle C3 C4. Ano: 1999 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-84041999000100007 Composição química de sementes de trigo (Triticum aestivum L.) submetidas a estresse salino na germinação Rev. bras. sementes Silva,Rodrigo Nascimento da; Duarte,Gisela Loureiro; Lopes,Nei Fernandes; Moraes,Dario Munt de; Pereira,Ana Lúcia de Almeida. O objetivo do experimento foi determinar algumas alterações bioquímicas de sementes de duas cultivares de trigo (BRS 177 e BRS 179) sob influência de diferentes níveis de sal (zero, 15, 30, 45 e 60mM NaCl) no processo de germinação. O ensaio foi realizado para avaliar alterações na atividade da a-amilase e nos teores de amido, açúcares redutores, carboidratos solúveis totais e proteínas causadas pelo estresse salino. A atividade da a-amilase e os teores carboidratos solúveis totais, açúcares redutores e proteínas são reduzidos, porém o conteúdo de amido aumenta com o incremento da salinidade, em ambas cultivares de trigo. Em todas as concentrações de NaCl, os componentes químicos nas sementes da cultivar BRS 179 são maiores do que os da cv. BRS 177,... Tipo: Info:eu-repo/semantics/article Palavras-chave: Triticum aestivum L. <; FONT FACE=Symbol>; A<; /font>; -amilase amido açúcares proteínas alterações bioquímicas sal. Ano: 2008 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0101-31222008000100027 Nitrate levels and stages of growth in hypernodulating mutants of Lupinus albus. II. Enzymatic activity and transport of N in the xylem sap Rev. Microbiol. Burity,Hélio Almeida; Chamber-Perez,Manuel; Lyra,Maria do Carmo Catanho Pereira de; Figueiredo,Márcia do Vale Barreto. The enzymatic study and transport of N in the xylem sap was carried out with a view to observing the influence of different nitrate levels and growth stages of the plant in chemically treated mutants of Lupinus albus. Several stresses induce a reduction in plant growth, resulting in the accumulation of free amino acids, amides or ureides, not only in the shoot, but also in the roots and nodules. Although enzyme activity is decisive in avoiding products that inhibit nitrogenase by ammonium, little is known about the mechanism by which the xylem carries these products. However, this process may be the key to the function of avoiding the accumulation of amino acids in the cells of infected nodules. The behaviour of the enzymes nitrate reductase (NR),... Tipo: Info:eu-repo/semantics/article Palavras-chave: Nitrate reductase phosphoenolpyruvate carboxylase glutamine synthetase N-<; FONT FACE=Symbol>; A<; /font>; -amino N-ureide N-amide Bradyrhizobium (Lupinus) nodule cytosol. Ano: 1999 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0001-37141999000200002 Bacteria isolated from a sugarcane agroecosystem: their potential production of polyhydroxyalcanoates and resistance to antibiotics Rev. Microbiol. Lima,Teresa Cristina S. de; Grisi,Breno M.; Bonato,M. Christina M.. In this investigation, a sugarcane agroecosystem at a coastal tableland, in the northeast of Brazil, was screened to obtain bacteria strains able to synthesize poly-<FONT FACE="Symbol">b</font>-hydroxyalkanoates (PHA), using sucrose as the main carbon source. The potential to synthesize PHA was tested qualitatively by Sudan Black staining of colonies growing in different carbon sources: sucrose, glucose, fructose, propionate and cellulose. In a typical sugarcane crop management system, the plantation is burned before harvesting and vinasse, a byproduct of alcohol production, is used in a fertirrigation system causing, probably, selective pressures on the microbiota of natural environments. Eightytwo bacteria strains, belonging to 16 different... Tipo: Info:eu-repo/semantics/article Palavras-chave: Soil bacteria poly-<; FONT FACE=Symbol>; B<; /font>; -hydroxyalkanoate PHA resistance to antibiotics sugarcane agroecosystem vinasse. Ano: 1999 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0001-37141999000300006 Properties of a new fungal b-galactosidase with potential application in the dairy industry Rev. Microbiol. Cruz,Rubens; Cruz,Vinícius D'Arcádia; Belote,Juliana Gisele; Khenayfes,Marcelo de Oliveira; Dorta,Claudia; Oliveira,Luiza Helena dos Santos. <FONT FACE="Symbol">b</font>-Galactosidase or <FONT FACE="Symbol">b</font>-D-galactoside-galactohydrolase (EC. 3.2.1.23) is an important enzyme industrially used for the hydrolysis of lactose from milk and milk whey for several applications. Lately, the importance of this enzyme was enhanced by its galactosyltransferase activity, which is responsible for the synthesis of transgalactosylated oligosaccharides (TOS) that act as functional foods, with several beneficial effects on consumers. Penicillium simplicissimum, a strain isolated from soil, when grown in semi-solid medium showed good productivity of <FONT FACE="Symbol">b</font>-galactosidase with galactosyltransferase activity. The optimum pH for hydrolysis was in the... Tipo: Info:eu-repo/semantics/article Palavras-chave: <; FONT FACE=Symbol>; B<; /font>; -Galactosidase galactosyltransferase galactooligosaccharides lactose prebiotic effect. Ano: 1999 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0001-37141999000300014 Carbono e nitrogênio em solo de uma cronossequência de floresta tropical - pastagem de Paragominas Scientia Agricola Bernoux,Martial; Feigl,Brigitte Josefine; Cerri,Carlos Clemente; Geraldes,Ana Paula de Arauda; Fernandes,Silvana Aparecida Pavan. Amostras de terra de áreas desmatadas há 4, 10 e 15 anos e utilizadas como pastagem e uma floresta nativa na região de Paragominas-PA, foram analisadas quanto à constituição isotópica e teor de carbono (C) e nitrogênio (N) com o objetivo de quantificar os estoques de C e N e as alterações devidas a mudanças do uso da terra. O conteúdo de C e N aumentaram ao longo do tempo de uso do solo como pastagem. Após 4 e 15 anos de cultivo o conteúdo de C aumentou 0,28 e 0,86 kg.m-2 na camada superficial 0-30 cm do solo; a pastagem de 10 anos ficou estável (diminuição de 0,02 kg.m-2) em relação à mata natural para a camada 0-30 cm, mas diminuiu de 0,15 na camada 0-10 cm. Na camada superficial 0-30 cm, a matéria orgânica da área sob mata natural é composta por 2,6... Tipo: Info:eu-repo/semantics/article Palavras-chave: Matéria orgânica pastagem floresta Amazônica <; FONT FACE=Symbol>; D<; /font>; 13C carbono nitrogênio. Ano: 1999 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-90161999000400003 Pituitary glycoprotein hormone a-subunit secretion by cirrhotic patients BJMBR Oliveira,M.C.; Pizarro,C.B.; Cassal,A.; Cremonese,R.; Vieira,J.G.H.. Secretion of the <FONT FACE="Symbol">a</font>-subunit of pituitary glycoprotein hormones usually follows the secretion of intact gonadotropins and is increased in gonadal failure and decreased in isolated gonadotropin deficiency. The aim of the present study was to determine the levels of the <FONT FACE="Symbol">a</font>-subunit in the serum of patients with cirrhosis of the liver and to compare the results obtained for eugonadal cirrhotic patients with those obtained for cirrhotic patients with hypogonadotropic hypogonadism. Forty-seven of 63 patients with cirrhosis (74.6%) presented hypogonadism (which was central in 45 cases and primary in 2), 7 were eugonadal, and 9 women were in normal menopause. The serum <FONT... Tipo: Info:eu-repo/semantics/article Palavras-chave: <; FONT FACE=Symbol>; A<; /font>; -subunit pituitary gonadotropins hypogonadism cirrhosis. Ano: 1999 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-879X1999000100011 Optimized Fast-FISH with a-satellite probes: acceleration by microwave activation BJMBR It has been shown for several DNA probes that the recently introduced Fast-FISH (fluorescence in situ hybridization) technique is well suited for quantitative microscopy. For highly repetitive DNA probes the hybridization (renaturation) time and the number of subsequent washing steps were reduced considerably by omitting denaturing chemical agents (e.g., formamide). The appropriate hybridization temperature and time allow a clear discrimination between major and minor binding sites by quantitative fluorescence microscopy. The well-defined physical conditions for hybridization permit automatization of the procedure, e.g., by a programmable thermal cycler. Here, we present optimized conditions for a commercially available X-specific <FONT... Tipo: Info:eu-repo/semantics/other Palavras-chave: Fluorescence in situ hybridization Fast-FISH metaphase chromosomes <; FONT FACE=Symbol>; A<; /font>; -satellite DNA probes microwave treatment quantitative image analysis. Ano: 1997 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-879X1997000100003 The role of IL-12 in experimental Trypanosoma cruzi infection BJMBR Silva,J.S.; Aliberti,J.C.S.; Martins,G.A.; Souza,M.A.; Souto,J.T.; Pádua,M.A.. Host resistance to Trypanosoma cruzi infection is dependent on both natural and acquired immune responses. During the early acute phase of infection in mice, natural killer (NK) cell-derived IFN-<FONT FACE="Symbol">g</font> is involved in controlling intracellular parasite replication, mainly through the induction of nitric oxide biosynthesis by activated macrophages. We have shown that IL-12, a powerful inducer of IFN-<FONT FACE="Symbol">g</font> production by NK cells, is synthesized soon after trypomastigote-macrophage interaction. The role of IL-12 in the control of T. cruzi infection in vivo was determined by treating infected mice with anti-IL-12 monoclonal antibody (mAb) and analyzing both parasitemia and mortality during the... Tipo: Info:eu-repo/semantics/article Palavras-chave: IL-12 Trypanosoma cruzi NK cells IFN-<; FONT FACE=Symbol>; G<; /font>; Nitric oxide. Ano: 1998 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-879X1998000100014 IFN-g in human Chagas' disease: protection or pathology? BJMBR Bahia-Oliveira,L.M.G.; Gomes,J.A.S.; Rocha,M.O.C.; Moreira,M.C.V.; Lemos,E.M.; Luz,Z.M.P.; Pereira,M.E.S.; Coffman,R.L.; Dias,J.C.P.; Cançado,J.R.; Gazzinelli,G.; Corrêa-Oliveira,R.. An apparently paradoxical role for IFN-<FONT FACE="Symbol">g</font> in human Chagas' disease was observed when studying the pattern of cytokine production by peripheral blood mononuclear cells (PBMC) obtained from two groups of chagasic patients after specific stimulation with Trypanosoma cruzi-derived antigens. The groups studied were 1) patients treated with benznidazole during the acute phase of Trypanosoma cruzi infection and 2) chronically infected untreated patients. In the treated group, higher levels of IFN-<FONT FACE="Symbol">g</font> were produced by PBMC from individuals cured after treatment when compared to non-cured patients. In contrast, in the chronically infected group (not treated) higher levels of IFN-<FONT... Tipo: Info:eu-repo/semantics/article Palavras-chave: Trypanosoma cruzi Chagas' disease cardiomyopathy peripheral blood mononuclear cells (PBMC) cytokines INF-<; FONT FACE=Symbol>; G<; /font>. Ano: 1998 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-879X1998000100017 Cytokines as determinants of resistance and pathology in human Schistosoma mansoni infection BJMBR Corrêa-Oliveira,R.; Malaquias,L.C.C.; Falcão,P.L.; Viana,I.R.C.; Bahia-Oliveira,L.M.G.; Silveira,A.M.S.; Fraga,L.A.O.; Prata,A.; Coffman,R.L.; Lambertucci,J.R.; Cunha-Melo,J.R.; Martins-Filho,O.A.; Wilson,R.A.; Gazzinelli,G.. The role of different cytokines in the peripheral blood mononuclear cell (PBMC) proliferative response and in in vitro granuloma formation was evaluated in a cross-sectional study with patients with the different clinical forms and phases of Schistosoma mansoni infection, as well as a group of individuals "naturally" resistant to infection named normal endemic (NE). The blockage of IL-4 and IL-5 using anti-IL-4 and anti-IL-5 antibodies significantly reduced the PBMC proliferative response to soluble egg (SEA) and adult worm (SWAP) antigens in acute (ACT), chronic intestinal (INT) and hepatosplenic (HS) patients. Similar results were obtained in the in vitro granuloma formation. Blockage of IL-10 had no significant effect on either assay using PBMC from ACT... Tipo: Info:eu-repo/semantics/article Palavras-chave: Schistosoma mansoni human schistosomiasis mansoni cytokines IL-10 IL-4 IFN-<; FONT FACE=Symbol>; G<; /font>. Ano: 1998 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-879X1998000100024 Immunologic patterns associated with cure in human American cutaneous leishmaniasis BJMBR Coutinho,S.G.; Da-Cruz,A.M.; Bertho,A.L.; Santiago,M.A.; De-Luca,P.. Patients with American cutaneous leishmaniasis were studied before therapy (active lesion) and at the end of therapy (cured patients). Assays of lymphocyte proliferative responses of peripheral blood mononuclear cells induced in vitro by Leishmania braziliensis promastigote antigens (Lb) were performed. Antigen-stimulated cells were harvested for CD4 and CD8 phenotype analysis and the levels of gamma interferon (IFN-<FONT FACE="Symbol">g</font>) and interleukin 4 (IL-4) produced were also determined in the culture supernatants. Two different patterns of Lb-induced T cell responses were observed: a) predominance of responding CD4+ cells and mixed type 1 and type 2 cytokine production (IFN-<FONT FACE="Symbol">g</font> and IL-4) during... Tipo: Info:eu-repo/semantics/article Palavras-chave: Human cutaneous leishmaniasis Leishmania braziliensis CD4+ and CD8+ cells IFN-<; FONT FACE=Symbol>; G<; /font>; IL-4. Ano: 1998 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-879X1998000100019 Eosinophil-active chemokines: assessment of in vivo activity BJMBR Teixeira,M.M.. The selective recruitment of eosinophils in tissue is a striking feature of allergic diseases. Recently, a family of chemoattractant molecules, namely chemokines, has been described which potently activates eosinophil function in vitro. We have developed a murine model of eosinophil recruitment to compare the relative potency and efficacy of chemokines in vivo. Of the chemokines tested, only eotaxin and MIP-1<FONT FACE="Symbol">a</font> induced significant accumulation of eosinophils in vivo, but eotaxin was more effective than MIP-1<FONT FACE="Symbol">a</font>. Chemokines, especially eotaxin acting via the CCR-3 receptor, may have a fundamental role in determining selective eosinophil recruitment in vivo Tipo: Info:eu-repo/semantics/article Palavras-chave: Eosinophils chemokines eotaxin MIP-1<; FONT FACE=Symbol>; A<; /font>; Chemokine receptors. Ano: 1998 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-879X1998000100003 Gastroduodenal resistance and neural mechanisms involved in saline flow decrease elicited by acute blood volume expansion in anesthetized rats BJMBR Graça,J.R.V.; Gondim,F. de-A.A.; Cavalcante,D.I.M.; Xavier-Neto,J.; Messias,E.L.M.; Rego,M.C.V.; Marques,J.A.P.; Santos,A.A.; Rola,F.H.. We have previously demonstrated that blood volume (BV) expansion decreases saline flow through the gastroduodenal (GD) segment in anesthetized rats (Xavier-Neto J, dos Santos AA &amp; Rola FH (1990) Gut, 31: 1006-1010). The present study attempts to identify the site(s) of resistance and neural mechanisms involved in this phenomenon. Male Wistar rats (N = 97, 200-300 g) were surgically manipulated to create four gut circuits: GD, gastric, pyloric and duodenal. These circuits were perfused under barostatically controlled pressure (4 cmH2O). Steady-state changes in flow were taken to reflect modifications in circuit resistances during three periods of time: normovolemic control (20 min), expansion (10-15 min), and expanded (30 min). Perfusion flow rates... Tipo: Info:eu-repo/semantics/article Palavras-chave: Blood volume expansion gastroduodenal resistance duodenum pylorus !-- $MVD$:face("Symbol") --<; FONT FACE=Symbol>; A<; /font>; -blockers vagotomy. Ano: 1997 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-879X1997001000019 Cytokine profiles during experimental Chagas' disease BJMBR Morato,M.J.F.; Colley,D.G.; Powell,M.R.. People infected with Trypanosoma cruzi remain so for life, yet only 30-40% of these individuals develop characteristic chagasic cardiomyopathies. Similarly, when infected with the Brazilian strain of T. cruzi, DBA/2 mice develop severe cardiac damage while B10.D2 mice do not. To better understand the immunological parameters that may be involved in the disease process, we have used this murine model (DBA/2 vs B10.D2) and compared the changes in cytokine production during the course of infection with T. cruzi. Concanavalin A (Con A) stimulation of spleen cells harvested during the acute phase (day 30) resulted in similarly high levels of IFN-<FONT FACE="Symbol">g</font> in both mouse strains. However, the amount of IFN-<FONT... Tipo: Info:eu-repo/semantics/article Palavras-chave: Experimental Chagas' disease Trypanosoma cruzi cytokines IFN-<; FONT FACE=Symbol>; G<; /font>; IL-10 IL-4. Ano: 1998 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-879X1998000100016 Analysis of the DF508 mutation in a Brazilian cystic fibrosis population: comparison of pulmonary status of homozygotes with other patients BJMBR Maróstica,P.J.C.; Raskin,S.; Abreu-e-Silva,F.A.. Sixty-one cystic fibrosis patients admitted for check-up or antibiotic treatment were enrolled for genetic and clinical evaluation. Genetic analysis was performed on blood samples stored on neonatal screening cards using PCR techniques to determine the presence of <FONT FACE="Symbol">D</font>F508 mutations. Clinical evaluation included Shwachman and Chrispin-Norman scores, age at onset of symptoms and diagnosis, spirometry, awake and sleep pulse oximetry, hyponychial angle measurement and presence of chronic Pseudomonas aeruginosa colonization. Eighteen patients (29.5%) were homozygous for the <FONT FACE="Symbol">D</font>F508 mutation, 26 (42.6%) had one <FONT FACE="Symbol">D</font>F508 mutation and 17 (27.9%) were... Tipo: Info:eu-repo/semantics/article Palavras-chave: Cystic fibrosis <; FONT FACE=Symbol>; D<; /font>; F508 gene mutation genotype phenotype. Ano: 1998 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-879X1998000400009 Effect of toxin-g from Tityus serrulatus scorpion venom on gastric emptying in rats BJMBR Bucaretchi,F.; Vinagre,A.M.; Chavéz-Olórtegui,C.; Collares,E.F.. The effect of toxin-<FONT FACE="Symbol">g</font> from Tityus serrulatus scorpion venom on the gastric emptying of liquids was studied in 176 young adult male Wistar rats (2-3 months of age) divided into subgroups of 8 animals each. Toxin-<FONT FACE="Symbol">g</font> was injected iv at doses of 25, 37.5, 50 or 100 µg/kg and the effect on gastric emptying was assessed 30 min and 8 h later. A time-course study was also performed by injecting 50 µg of toxin-<FONT FACE="Symbol">g</font> /kg and measuring the effect on gastric emptying at times 0.25, 0.5, 1, 2, 4, 8, 24 and 48 h post-venom. Each envenomed animal was paired with its saline control and all received a saline test meal solution containing phenol red (60 µg/ml) as... Tipo: Info:eu-repo/semantics/other Palavras-chave: Gastric emptying Tityus serrulatus scorpion venom toxin-<; FONT FACE=Symbol>; G<; /font>. Ano: 1999 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-879X1999000400009 Interaction between NO and oxytocin: Influence on LHRH release BJMBR Nitric oxide synthase (NOS)-containing neurons have been localized in various parts of the CNS. These neurons occur in the hypothalamus, mostly in the paraventricular and supraoptic nuclei and their axons project to the neural lobe of the pituitary gland. We have found that nitric oxide (NO) controls luteinizing hormone-releasing hormone (LHRH) release from the hypothalamus acting as a signal transducer in norepinephrine (NE)-induced LHRH release. LHRH not only releases LH from the pituitary but also induces sexual behavior. On the other hand, it is known that oxytocin also stimulates mating behavior and there is some evidence that oxytocin can increase NE release. Therefore, it occurred to us that oxytocin may also stimulate LHRH release via NE and NO. To... Tipo: Info:eu-repo/semantics/other Palavras-chave: Nitric oxide synthase norepinephrine <; FONT FACE=Symbol>; A<; /font>; -adrenergic receptors prostaglandin E2 arginine citrulline NMMA sodium nitroprusside. Ano: 1997 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-879X1997000400004 Multifactorial control of water and saline intake: role of a2-adrenoceptors BJMBR Water and saline intake is controlled by several mechanisms activated during dehydration. Some mechanisms, such as the production of angiotensin II and unloading of cardiovascular receptors, activate both behaviors, while others, such as the increase in blood osmolality or sodium concentration, activate water, but inhibit saline intake. Aldosterone probably activates only saline intake. Clonidine, an <FONT FACE="Symbol">a</font>2-adrenergic agonist, inhibits water and saline intake induced by these mechanisms. One model to describe the interactions between these multiple mechanisms is a wire-block diagram, where the brain circuit that controls each intake is represented by a summing point of its respective inhibiting and activating factors. The... Tipo: Info:eu-repo/semantics/other Palavras-chave: Sodium intake water intake clonidine noradrenaline dehydration <; FONT FACE=Symbol>; A<; /font>; 2-adrenergic agonist. Ano: 1997 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-879X1997000400011 Does plasma ANP participate in natriuresis induced by a-MSH? BJMBR <FONT FACE="Symbol">a</font>-Melanocyte-stimulating hormone (<FONT FACE="Symbol">a</font>-MSH; 0.6 and 3 nmol) microinjected into the anteroventral region of the third ventricle (AV3V) induced a significant increase in diuresis without modifying natriuresis or kaliuresis. Intraperitoneal (ip) injection of <FONT FACE="Symbol">a</font>-MSH (3 and 9.6 nmol) induced a significant increase in urinary sodium, potassium and water excretion. Intraperitoneal (3 and 4.8 nmol) or iv (3 and 9.6 nmol) administration of <FONT FACE="Symbol">a</font>-MSH did not induce any significant changes in plasma atrial natriuretic peptide (ANP), suggesting that the natriuresis, kaliuresis and diuresis induced by the systemic action of... Tipo: Info:eu-repo/semantics/other Palavras-chave: <; FONT FACE=Symbol>; A<; /font>; -MSH AV3V ANP natriuresis kaliuresis diuresis. Ano: 1997 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-879X1997000400005 Registros recuperados: 20 Primeira ... 1 ... 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