6 results on '"Silvia Marchesan"'
Search Results
2. Nanotubes and water-channels from self-assembling dipeptides
- Author
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Ottavia Bellotto, Paola D’Andrea, and Silvia Marchesan
- Subjects
Biomedical Engineering ,General Materials Science ,General Chemistry ,General Medicine - Abstract
Nanotubes and water-filled channels arising from self-assembling dipeptides display interesting physico-chemical and electronic properties that find potential applications spanning from drug delivery and medicine, to bioelectronics and bioimaging.
- Published
- 2023
3. A biocatalytic and thermoreversible hydrogel from a histidine-containing tripeptide
- Author
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Ana M. Garcia, Silvia Marchesan, Marina Kurbasic, Michele Melchionna, Slavko Kralj, GARCIA FERNANDEZ, ANA MARIA, Kurbasic, Marina, Kralj, Slavko, Melchionna, Michele, and Marchesan, Silvia
- Subjects
amino acids ,chirality ,D-amino acid ,peptide ,hydrogels ,self-assembly ,catalysis ,hydrolysis ,nanomaterials ,nanostructures ,Peptide ,catalysi ,02 engineering and technology ,Tripeptide ,010402 general chemistry ,01 natural sciences ,Catalysis ,Hydrolysis ,Materials Chemistry ,Organic chemistry ,Histidine ,hydrolysi ,chemistry.chemical_classification ,Metals and Alloys ,General Chemistry ,021001 nanoscience & nanotechnology ,Combinatorial chemistry ,0104 chemical sciences ,Surfaces, Coatings and Films ,Electronic, Optical and Magnetic Materials ,Amino acid ,chemistry ,Self-healing hydrogels ,Ceramics and Composites ,nanomaterial ,Self-assembly ,hydrogel ,0210 nano-technology ,Chirality (chemistry) ,amino acid - Abstract
We report the first histidine-containing self-assembling tripeptide devoid of capping groups that forms a thermoreversible hydrogel under physiological conditions and catalyses hydrolysis of an ester, providing a minimalist building block for functional soft materials.
- Published
- 2017
4. Carbon nanotubes and catalysis: the many facets of a successful marriage
- Author
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Michele Melchionna, Maurizio Prato, Silvia Marchesan, Paolo Fornasiero, Melchionna, Michele, Marchesan, Silvia, Prato, Maurizio, and Fornasiero, Paolo
- Subjects
carbon nanotubes ,catalysis ,nanoparticles ,Materials science ,chemistry.chemical_element ,Nanoparticle ,Nanotechnology ,catalysi ,Carbon nanotube ,Electrocatalyst ,Catalysis ,law.invention ,Metal ,chemistry.chemical_compound ,chemistry ,law ,visual_art ,visual_art.visual_art_medium ,Photocatalysis ,Organic synthesis ,carbon nanotube ,Carbon - Abstract
Carbon nanotubes have emerged as unique carbon allotropes that bear very interesting prospects in catalysis. Their use is mostly related to that of supports for inorganic metal catalysts, including molecular catalysts, metal nanoparticles, metal oxides or even more complex hierarchical hybrids. However, several reports have shown that they can intriguingly act as metal-free catalysts, with performance often superior to that of other carbon materials, in particular when ad hoc organic functional groups are attached prior to catalytic screening. The range of catalytic reactions is quite wide, and it includes standard organic synthesis, electrocatalysis, photocatalysis as well as other important industrial processes. In the last few years, the energy sector has acquired a dominant role as one of the most sought-after fields of application, given its ever-increasing importance in society.
- Published
- 2015
5. Natural and artificial photosynthesis: general discussion
- Author
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John M. Kelly, Dario M. Bassani, Alejandro Díaz-Moscoso, Filippo Monti, Amilra Prasanna De Silva, Julia A. Weinstein, Marcelino Maneiro, Elena Galoppini, Randolph P. Thummel, Paola Ceroni, Stafford W. Sheehan, Albert Ruggi, Qing Pan, Sebastiano Campagna, Johannes G. Vos, Anthony Harriman, Clémence Allain, Andrea Sartorel, Elizabeth A. Gibson, Per-Arno Plötz, Devens Gust, Cornelia Bohne, Gary W. Brudvig, Antonín Vlček, Villy Sundström, Frank Würthner, Osamu Ishitani, Frederick D. Lewis, Silvia Marchesan, Karl Börjesson, Christopher M. Lemon, Daniel G. Nocera, Jana Rohacova, Franco Scandola, Bohne, Cornelia, Pan, Qing, Ceroni, Paola, Börjesson, Karl, Rohacova, Jana, Lewis, Frederick, Vlcek, Antonin, Bassani, Dario M., Würthner, Frank, Sartorel, Andrea, De Silva, Amilra Prasanna, Nocera, Dan, Scandola, Franco, Lemon, Christopher, Allain, Clémence, Brudvig, Gary W., Marchesan, Silvia, Sundstrom, Villy, Campagna, Sebastiano, Sheehan, Stafford W., Plötz, Per-Arno, Monti, Filippo, Kelly, John M., Gibson, Elizabeth, Maneiro, Marcelino, Harriman, Anthony, Ruggi, Albert, Galoppini, Elena, Thummel, Randolph, Weinstein, Julia, Vos, Johanne, Ishitani, Osamu, Gust, Deven, Díaz-Moscoso, Alejandro, Bohne, C., Pan, Q., Ceroni, P., Börjesson, K., Rohacova, J., Lewis, F., Vlcek, A., Bassani, D. M., Würthner, F., Sartorel, A., de Silva, A. P., Nocera, D., Scandola, F., Lemon, C., Allain, C., Brudvig, G. W., Sundstrom, V., Campagna, S., Sheehan, S. W., Plötz, P., Monti, F., Kelly, J. M., Gibson, E., Maneiro, M., Harriman, A., Ruggi, A., Galoppini, E., Thummel, R., Weinstein, J., Vos, J., Ishitani, O., Gust, D., and Díaz Moscoso, A.
- Subjects
photosynthesis ,supramolecular chemistry ,photosynthesi ,Chemistry ,Biochemical engineering ,Photosynthesis ,Physical and Theoretical Chemistry ,Supramolecular Photochemistry ,Artificial photosynthesis ,Natural (archaeology) - Abstract
General discussion on natural and artificial photosynthesis.
- Published
- 2015
6. Unzipping the role of chirality in nanoscale self-assembly of tripeptide hydrogels
- Author
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Liz Goodall, John S. Forsythe, Lynne J. Waddington, Silvia Marchesan, Christopher D. Easton, David A. Winkler, Patrick G. Hartley, Marchesan, Silvia, Waddington, Lynne, Easton, Christopher D., Winkler, David A., Goodall, Liz, Forsythe, John, and Hartley, Patrick G.
- Subjects
Protein Structure ,Secondary ,Nanostructure ,Stereochemistry ,Supramolecular chemistry ,Stereoisomerism ,Peptide ,Tripeptide ,Dipeptides ,Hydrogels ,Hydrogen-Ion Concentration ,Hydrophobic and Hydrophilic Interactions ,Nanostructures ,Protein Binding ,Protein Structure, Secondary ,Thiazoles ,Materials Science (all) ,Hydrophobic and Hydrophilic Interaction ,Protein structure ,Dipeptide ,General Materials Science ,Benzothiazoles ,chemistry.chemical_classification ,Chemistry ,Hydrogel ,Self-healing hydrogels ,Biophysics ,Self-assembly ,Thiazole ,Chirality (chemistry) - Abstract
Change of chirality is a useful tool to manipulate the aqueous self-assembly behaviour of uncapped, hydrophobic tripeptides. In contrast with other short peptides, these tripeptides form hydrogels at a physiological pH without the aid of organic solvents or end-capping groups (e.g. Fmoc). The novel hydrogel forming peptide (D)Leu-Phe-Phe ((D)LFF) and its epimer Leu-Phe-Phe (LFF) exemplify dramatic supramolecular effects induced by subtle changes to stereochemistry. Only the d-amino acid-containing peptide instantly forms a hydrogel in aqueous solution following a pH switch, generating long fibres (100 μm) that entangle into a 3D network. However, unexpected nanostructures are observed for both peptides and they are particularly heterogeneous for LFF. Structural analyses using CD, FT-IR and fluorescent amyloid staining reveal anti-parallel beta-sheets for both peptides. XRD analysis also identifies key distances consistent with beta-sheet formation in both peptides, but suggests additional high molecular order and extended molecular length for (D)LFF only. Molecular modelling of the two peptides highlights the key interactions responsible for self-assembly; in particular, rapid self-assembly of (D)LFF is promoted by a phenylalanine zipper, which is not possible because of steric factors for LFF. In conclusion, this study elucidates for the first time the molecular basis for how chirality can dramatically influence supramolecular organisation in very short peptide sequences.
- Published
- 2012
Catalog
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