Search Results - "Navarro, Diego A."

Amidation of arabinoglucuronoxylans to modulate their flow behavior by Sznaider, Frank, Rojas, Ana M., Stortz, Carlos A., Navarro, Diego A.

“…Arabinoglucuronoxylans obtained from the exudate of Cercidium praecox (Brea gum) were subjected to an amidation reaction to modulate their flow behavior to…”
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Chemical structure and rheological studies of arabinoglucuronoxylans from the Cercidium praecox exudate brea gum by Sznaider, Frank, Rojas, Ana M., Stortz, Carlos A., Navarro, Diego A.

“…•Brea gum is composed of highly branched arabinoglucuronoxylans.•The substituents of the xylan chain were identified by NMR and chemical methods.•The acetyl…”
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Structure and rheology of the polysaccharides from Schizymenia dubyi: Isolation of an unusual glucurono-carrageenan by Benech-Arnold, Tomás, Navarro, Diego A., Rodríguez, Cristian, Schmidt, William, Fredericq, Suzanne, Rojas, Ana M., Stortz, Carlos A.

“…The system of polysaccharides from Schizymenia dubyi (Nemastomatales) was investigated. It contains a mixture of hybrid dl galactans (SH-S) and…”
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Disaccharides obtained from carrageenans as potential antitumor agents by Calvo, Gustavo H., Cosenza, Vanina A., Sáenz, Daniel A., Navarro, Diego A., Stortz, Carlos A., Céspedes, Mariela A., Mamone, Leandro A., Casas, Adriana G., Di Venosa, Gabriela M.

“…Carrageenans are sulfated galactans found in certain red seaweeds with proven biological activities. In this work, we have prepared purified native and…”
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Fucoidans from the phaeophyta Scytosiphon lomentaria: Chemical analysis and antiviral activity of the galactofucan component by Ponce, Nora M.A., Flores, María L., Pujol, Carlos A., Becerra, Mónica B., Navarro, Diego A., Córdoba, Osvaldo, Damonte, Elsa B., Stortz, Carlos A.

“…The brown seaweed Scytosiphon lomentaria produces moderate amounts of fucoidans. By cetrimide fractionation, typical heavily sulfated galactofucans are…”
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Rheology of partially and totally oxidized red seaweed galactans by Cosenza, Vanina A., Navarro, Diego A., Stortz, Carlos A., Rojas, Ana M.

“…•κ-carrageenan and agarose were oxidized in different degrees by TEMPO.•The gelling behavior differs from that of the parent polysaccharides.•Derivatives with…”
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Perennial halophyte Salicornia neei Lag.: Cell wall composition and functional properties of its biopolymers by Villarreal, Matias R., Navarro, Diego A., Ponce, Nora M.A., Rojas, Ana M., Stortz, Carlos A.

“…•Sequential extraction of Salicornia neei halophyte gave 4.7% of pectin and protein.•These water and Na2CO3 soluble pectin fractions gave weak-gel type systems…”
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Minor polysaccharidic constituents from the red seaweed Hypnea musciformis. Appearance of a novel branched uronic acid by Cosenza, Vanina A., Navarro, Diego A., Stortz, Carlos A.

“…[Display omitted] •Hypnea musciformis contains agaran and carrageenan/agaran hybrids as minor constituents.•Several different fractions can be isolated from…”
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The system of fucoidans from the brown seaweed Dictyota dichotoma: Chemical analysis and antiviral activity by Rabanal, Melissa, Ponce, Nora M.A., Navarro, Diego A., Gómez, Ricardo M., Stortz, Carlos A.

“…•Dictyota dichotoma thalli were extracted with room temperature and hot acid solutions.•Extracts were fractionated by cetrimide precipitation and NaCl…”
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Partial and total C-6 oxidation of gelling carrageenans. Modulation of the antiviral activity with the anionic character by Cosenza, Vanina A., Navarro, Diego A., Pujol, Carlos A., Damonte, Elsa B., Stortz, Carlos A.

“…•TEMPO (a nitroxyl radical) oxidizes ι-carrageenans exclusively on C-6.•For κ-carrageenan oxidation of C-2 of 3,6-AnGal also occurs.•The side reaction can be…”
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Chemical and rheological characterization of the carrageenans from Hypnea musciformis (Wulfen) Lamoroux by Cosenza, Vanina A., Navarro, Diego A., Fissore, Eliana N., Rojas, Ana M., Stortz, Carlos A.

“…•Carrageenans from Hypnea musciformis were extracted with water both at room temperature and at 90°C.•Hot water extracted six times more κ-carrageenan than…”
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DFT/PCM theoretical study of the conversion of methyl 4-O-methyl-α-d-galactopyranoside 6-sulfate and its 2-sulfated derivative into their 3,6-anhydro counterparts by Cosenza, Vanina A., Navarro, Diego A., Stortz, Carlos A.

“…•The alkaline treatment of carrageenans was modeled by DFT.•The substitution step (SN2) is the rate-limiting step.•Preferably, deprotonation precedes chair…”
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Hydrolytic Stability of l-(+)-Ascorbic Acid in Low Methoxyl Pectin Films with Potential Antioxidant Activity at Food Interfaces by De’Nobili, María Dolores, Pérez, Carolina Daiana, Navarro, Diego A., Stortz, Carlos A., Rojas, Ana M.

“…l -(+)-Ascorbic acid (AA) was compartmentalized into a low methoxyl pectin (LMP) film in view of localized antioxidant activity at food interfaces. The AA…”
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Microwave-assisted desulfation of sulfated polysaccharides by Navarro, Diego A., Flores, María L., Stortz, Carlos A.

“…Several sulfated polysaccharides were desulfated by heating their pyridinium salts dissolved in dimethyl sulfoxide in a microwave oven. The procedure was…”
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The system of xylogalactans from the red seaweed Jania rubens (Corallinales, Rhodophyta) by Navarro, Diego A., Stortz, Carlos A.

“…The main acidic polysaccharides from the red seaweed Jania rubens share the general characteristics of corallinans (agar-like xylogalactans). After…”
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Usage of α-picoline borane for the reductive amination of carbohydrates by Cosenza, Vanina A., Navarro, Diego A., Stortz, Carlos A.

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Xylogalactans from Lithothamnion heterocladum, a crustose member of the Corallinales (Rhodophyta) by Navarro, Diego A., Ricci, Alejandra M., Rodríguez, María C., Stortz, Carlos A.

“…The main polysaccharides from the red seaweed Lithothamnion heterocladum share the general characteristics of corallinans (agar-like xylogalactans), even…”
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DIFFERENCES IN POLYSACCHARIDE STRUCTURE BETWEEN CALCIFIED AND UNCALCIFIED SEGMENTS IN THE CORALLINE CALLIARTHRON CHEILOSPORIOIDES (CORALLINALES, RHODOPHYTA) by Martone, Patrick T, Navarro, Diego A, Stortz, Carlos A, Estevez, José M

“…The articulated coralline Calliarthron cheilosporioides Manza produces segmented fronds composed of calcified segments (intergenicula) separated by uncalcified…”
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DFT/MM modeling of the five-membered ring in 3,6-anhydrogalactose derivatives and its influence on disaccharide adiabatic maps by Navarro, Diego A., Stortz, Carlos A.

“…Different conformations of methyl 3,6-anhydro-4- O-methyl-α- d-galactoside ( 1) and 3,6-anhydro-4- O-methylgalactitol ( 2) were studied by molecular mechanics…”
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Microwave-assisted alkaline modification of red seaweed galactans by Navarro, Diego A, Stortz, Carlos A

“…The production of 3,6-anhydrogalactose units from galactose 6-sulfated residues by alkaline treatment is an important reaction undergone by many red seaweed…”
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