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| Registros recuperados: 16 | |
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| 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 |
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| 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 |
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| Moreira,Fabiana Guillen; Lima,Francieli Arrias de; Pedrinho,Sophia Renata Fazzano; Lenartovicz,Veridiana; Souza,Cristina Giatti Marques de; Peralta,Rosane Marina. |
| A strain of Aspergillus tamarii, a filamentous fungus isolated from soil, was able to produce both <FONT FACE="Symbol">a</FONT>-amylase and glucoamylase activities in mineral media supplemented with 1% (w/v) starch or maltose as the carbon source. Static cultivation led to significantly higher yields than those obtained using shaking culture. The production of amylases was tolerant to a wide range of initial culture pH values (from 4 to 10) and temperature (from 25 to 42oC). Two amylases, one <FONT FACE="Symbol">a</FONT>-amylase and one glucoamylase, were separated by ion exchange chromatography. Both partially purified enzymes had optimal activities at pH values between 4.5 and 6.0 and were stable under acid conditions (pH... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: <; FONT FACE=Symbol>; A<; /FONT>; -amylase Aspergillus tamarii glucoamylase. |
| Ano: 1999 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0001-37141999000200014 |
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| 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 & 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 |
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| <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 |
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| Registros recuperados: 16 | |
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