A. Sampietro

Publications50
h-index19
Citations2,007
Highly Influential Citations62
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  • Publications
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Comparison of the free radical-scavenging activity of propolis from several regions of Argentina.
Propolis is extensively used in Argentine folk medicine. Alcoholic extracts of propolis from different regions of Argentina were prepared. The extracts were analysed for the determination of total… Expand
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Screening antifungal activities of selected medicinal plants.
Plants synthesise a vast array of secondary metabolites that are gaining importance for their biotechnological applications. The antifungal activity of the ethanolic extracts of ten Argentinean… Expand
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Screening of antibacterial activity of Amaicha del Valle (Tucumán, Argentina) propolis.
Propolis is extensively used in Argentine folk medicine. Alcoholic extracts of propolis from four localities of Amaicha del Valle (El Paraiso, La Banda Este, La Banda Oeste and El Molino), Province… Expand
  • 178
  • 6
Essential groups at the active site of Trapaeolum invertase
Abstract Amino acid residues involved at the active site of Tropaeolum majus invertase (β- d -fructofuranoside fructohydrolase, EC 3.2.1.26) were determined. Photo-oxidation and Woodward's reagent K… Expand
  • 21
  • 6
Antioxidant activity of Argentine propolis extracts.
Propolis is used in Argentine folk medicine. We have examined its possible protective action against oxidative modification of lipid in unfractionated serum. The kinetics of copper-induced oxidation… Expand
  • 193
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Purification and characterization of Ricinus communis invertase.
An invertase from Ricinus communis leaves was purified 4,400-fold. The preparation was homogeneous by criteria of gel electrophoresis, gel permeation, adsorption, and ionic exchange chromatography.… Expand
  • 34
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Cell wall invertases from sugar cane
Abstract Invertases in sugar cane leaf sheaths are firmly bound to the cell wall. They consist of three different enzymes distinguished on the basis of optimum pH, K m and the response to inhibitors.… Expand
  • 24
  • 1
Hydrolysis of sucrose within isolated vacuoles from Solanum tuberosum L. tubers
Abstract. The soluble acid invertase (β-D-fructofuranoside fructohydrolase, EC 3.2.1.26) from potato (Solanum tuberosum L. cv. Kennebec) tubers was located in the vacuoles. Although the functionality… Expand
  • 33
  • 1
A simple and sensitive method for determining reducing sugars in plant tissues. Application to quantify the sugar content in quinoa (Chenopodium quinoa Willd.) seedlings
A simple and sensitive method for the colorimetric determination of reducing sugars in plant materials is proposed. The procedure is based on reduction under alkaline conditions of potassium… Expand
  • 32
  • 1
Localization of invertase activities in ricinus communis leaves
Leaf tissue from Ricinus communis possesses cell wall and soluble invertases. These activities may be distinguished on the basis of their optimum pH and Km and the action of various inhibitors. Ca… Expand
  • 37
  • 1