Hydrolysable N
Mostrando 1-12 de 34 artigos, teses e dissertações.
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1. Phenolic Compounds from Leaves of Cariniana estrellensis (Raddi) Kuntze (Lecythidaceae): A Brazilian Atlantic Forest Tree
Cariniana estrellensis (Raddi) Kuntze seedlings have been used in forest restoration programs in the Atlantic Forest biome. However, despite the economic and ecological relevance of this species, to date no general method for rapid identification of primary and secondary metabolites of C. estrellensis leaves has been reported. In this work, we explore the fe
Journal of the Brazilian Chemical Society. Publicado em: 2023
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2. The role of condensed tannins in ruminant animal production: advances, limitations and future directions
ABSTRACT Tannins represent one of the most abundant polyphenolic compounds in plants. Tannins exist as a multitude of chemically unique entities in nature. The most commonly occurring tannins are typically divided into two major classes based on chemical structure: hydrolysable (HT) or condensed tannins (CT). Hydrolysable tannins are esters of gallic or ella
R. Bras. Zootec.. Publicado em: 2017-12
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3. Cellulase activity and dissolved organic carbon release from lignocellulose macrophyte-derived in four trophic conditions
Abstract Considering the importance of lignocellulose macrophyte-derived for the energy flux in aquatic ecosystems and the nutrient concentrations as a function of force which influences the decomposition process, this study aims to relate the enzymatic activity and lignocellulose hydrolysis in different trophic statuses. Water samples and two macrophyte spe
Braz. J. Microbiol.. Publicado em: 2016-06
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4. Environmental factors affecting the concentration of phenolic compounds in Myrcia tomentosa leaves
Myrcia tomentosa (Aubl.) DC., Myrtaceae, found in Central Brazilian Cerrado and popularly known as "goiaba-brava", belongs to the Myrcia genus, which has several species with medicinal properties such as: hypoglycemic, diuretic, hypotensive, antidiarrheal, antimicrobial and antitumor. The present study aimed to analyzed the environmental influence on concent
Rev. bras. farmacogn.. Publicado em: 25/02/2013
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5. Influence of foliar nutrients on phenol levels in leaves of Eugenia uniflora
Eugenia uniflora L., Myrtaceae, leaves contain high amounts of phenolic compounds which are responsible for several pharmacological activities. In order to evaluate the phenolics seasonal variation leaves were analysed on a monthly basis during the period of two years for the contents of hydrolysable tannins, total phenols, flavonoids, and nutrients (N, P, K
Revista Brasileira de Farmacognosia. Publicado em: 24/06/2011
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6. Tempo de hidrolise e concentracao de acido para fracionamento do nitrogenio organico do solo.
Foram estudados tempos de hidrolise (3,6,12,20,24 e 36h) e concentracoes de acido (HCl 1N, 3N e 6N) na recuperacao de formas organicas de N provenientes de substancias nitrogenadas conhecidas ou presentes no solo pelos metodos de "hidrolise continua" e "hidrolise sequencial". Os polimeros de maior peso molecular, como a quitina, necessitaram mais de 36 horas
Pesquisa Agropecuaria Brasileira. Publicado em: 2011
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7. [Difluro(phosphono)methyl]phenylalanine-containing peptide inhibitors of protein tyrosine phosphatases.
Peptides containing the non-hydrolysable phosphotyrosine analogue 4-[difluro(phosphono)methyl]phenylalanine [Phe(CF2P)] were synthesized and tested as inhibitors of the protein tyrosine phosphatases (PTPs) PTP1B, CD45, PTPbeta, LAR and SHP-1. We have identified peptides containing two adjacent Phe(CF2P) residues as potent inhibitors of PTPs. The tripeptide h
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8. Mechanism of extracellular ATP-induced increase of cytosolic Ca2+ concentration in isolated rat ventricular myocytes.
1. Changes in the cytosolic Ca2+ concentration ([Ca2+]i) of isolated rat ventricular myocytes in suspension were measured in response to extracellular ATP using the fluorescent Ca2+ indicators Quin-2 and Fura-2. 2. ATP produced a concentration-, time- and Mg(2+)-dependent, biphasic increase of [Ca2+]i whereas slowly hydrolysable ATP analogues produced a slow
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9. Characterization of proteolytic fragments of bacteriophage T7 DNA ligase.
Treatment of T7 DNA ligase with a range of proteases generates two major fragments which are resistant to further digestion. These fragments, of molecular weight 16 and 26 kDa, are derived from the N- and C-termini of the protein, respectively. The presence of ATP or a non-hydrolysable analogue, ADPNP, during limited proteolysis greatly reduces the level of
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10. Rho guanine nucleotide dissociation inhibitor protein (RhoGDI) inhibits exocytosis in mast cells.
Introducing non-hydrolysable analogues of GTP into the cytosolic compartment of mast cells results in exocytotic secretion through the activation of GTP binding proteins. The identity and mechanism of action of these proteins are not established. We have investigated the effects of Rho GDP dissociation inhibitor (RhoGDI) on exocytosis induced by guanosine 5'
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11. Muscarinic modulation of calcium current in neurones from the interatrial septum of bull-frog heart.
1. The effects of activation of muscarinic receptors on the voltage-dependent calcium current, ICa, in parasympathetic neurones were examined. 2. Neurones were enzymatically isolated from the interatrial septum of bull-frog (Rana catesbeiana) heart, and were maintained in short-term (1-6 day) tissue culture. ICa was recorded from the cells using whole-cell p
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12. Selective downregulation of an inactivating K+ conductance by analogues of cAMP in mouse Schwann cells.
1. Voltage-dependent K+ conductances on Schwann cells in organotypic cultures of mouse dorsal root ganglia were classified as inactivating or sustained (responsible for currents IA and IK, respectively). IA is known to be much reduced on Schwann cells that contact neurites. 2. In the absence of neurones, IA and IK were present. IA, but not IK, was markedly r