M. Benvenuti | University of Siena / Università di Siena (original) (raw)

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Papers by M. Benvenuti

Research paper thumbnail of Crystal structure of OXA-10loop48 in complex with hydrolyzed doripenem

Research paper thumbnail of New refinement of the crystal structure of BJP-1, a subclass B3 metallo-beta-lactamase of Bradyrhizobium japonicum

Research paper thumbnail of Applied macroinorganics. IV. Effect of the crosslinking agent on protonation, and metal ions complexing abilities, of ion exchange resins with poly(amido–amine) structure

Journal of Applied Polymer Science, 1983

ABSTRACT

Research paper thumbnail of Crystal structure of the complex between class B3 beta-lactamase BJP-1 and 4-nitrobenzene-sulfonamide - new refinement

Research paper thumbnail of Crystal structure of CTX-M-15 extended-spectrum beta-lactamase in complex with avibactam (NXL104)

Research paper thumbnail of Heparinizable materials, 5. Preparation and FTIR characterization of polyurethane surfaces grafted with heparin-complexing poly(amido-amine) chains

Abstract The chains of poly (amido-amine)(1) were grafted on the surface of two different polyure... more Abstract The chains of poly (amido-amine)(1) were grafted on the surface of two different polyurethanes (2 and 3), one of which being a commercial product. All the chemical steps of the grafting reaction were monitored by chemical analysis and FTIR spectroscopy. The ...

Research paper thumbnail of Crystal Structure of FUS-1 (OXA-85), a Class D beta-lactamase from Fusobacterium nucleatum subsp. polymorphum

Research paper thumbnail of Uptake of metal ions from aqueous sulphuric acid by resins

Polymer, 1987

ABSTRACT The uptake capacity towards heavy metal ions in aqueous sulphuric acid of fourteen cross... more ABSTRACT The uptake capacity towards heavy metal ions in aqueous sulphuric acid of fourteen crosslinked polymer resins has been studied. Some resins contain poly(amido-amine)s or poly(amido-aminoacid)s crosslinked with 1,4-diaminobutane, others contain free NH2 or oxime groups on a tightly crosslinked structure. All the resins are highly swellable in sulphuric acid solution and, except for the resin containing oxime groups, degrade in a 7–20 days period. All the resins show capacity of retention for Ni2+ in 1.53 M sulphuric acid. The resins of the first group also show some selectivity towards several metal ions in this order: . The resin containing oxime as a donor group does not show such a selectivity, but does exhibit larger retention capacity. N.m.r. spectra indicate the presence of ion pairs in H2SO4 solution containing metal ions as M(HSO4)x − nn, vis. negative species, which are retained from the positively charged resins. For the resin containing oxime groups, the retention seems to occur via a coordination mechanism.

Research paper thumbnail of Crystal structure of native AmpC beta-lactamase from Pseudomonas aeruginosa PAO1

Research paper thumbnail of Crystal structure of class D Beta-lactamase OXA-48 in complex with meropenem

Research paper thumbnail of Crystal structure of class D Beta-lactamase OXA-48 in complex with ertapenem

Confinement plays an important role in preventing cracking and premature shear failure, increasin... more Confinement plays an important role in preventing cracking and premature shear failure, increasing the compressive strength and increasing the ductility of the element. One of the most efficient retrofitting methods is the reinforcement method with external restraints using high quality materials. Based on previous research, the use of external restraints using high quality materials can be in the form of steel wire mesh and wire rope restraints, and high-quality fiber such as CFRP (carbon fiber reinforced polymer). In this research, a study will be conducted to determine the effect of CFRP confinement reinforcement on a concrete cylinder that will be modeled with finite element software. The dimensions of the concrete cylinder used have a height of 300 mm and a diameter of 150 mm. The concrete cylinder is reinforced with CFRP with a thickness variation of 0.

Research paper thumbnail of Crystal structure of the VIM-2 acquired metallo-beta-Lactamase in Complex with compound 8 (JMV-7207)

Research paper thumbnail of Crystal structure of the VIM-2 acquired metallo-beta-Lactamase in Complex with compound 14 (JMV-6931)

Research paper thumbnail of Crystal structure of P104H mutant of SOD-like protein from Bacillus subtilis

Research paper thumbnail of Crystal structure of the double mutant Y88H-P104H of a SOD-like protein from Bacillus subtilis

Research paper thumbnail of Crystal structure of OXA-48 beta-lactamase

Research paper thumbnail of Crystal structure of the bromide adduct of AphA class B acid phosphatase/phosphotransferase from E. coli at 2.2 A resolution

Research paper thumbnail of Crystal Structure of an Engineered OXA-10 Variant with Carbapenemase Activity, OXA-10loop24

of Law for the invitation to write this Essay for the conference at Bar-Ilan on "Religious Perspe... more of Law for the invitation to write this Essay for the conference at Bar-Ilan on "Religious Perspectives on the Rule of Law." I received helpful comments and criticisms from participants in presentations or workshops at the Fourth Meeting of the International Consortium of Law and Religion Studies (iclars) at the

Research paper thumbnail of Acinetobacter baumanii OXA-24 complex with Avibactam

Research paper thumbnail of OXA-48 covalent complex with Avibactam inhibitor

Research paper thumbnail of Crystal structure of OXA-10loop48 in complex with hydrolyzed doripenem

Research paper thumbnail of New refinement of the crystal structure of BJP-1, a subclass B3 metallo-beta-lactamase of Bradyrhizobium japonicum

Research paper thumbnail of Applied macroinorganics. IV. Effect of the crosslinking agent on protonation, and metal ions complexing abilities, of ion exchange resins with poly(amido–amine) structure

Journal of Applied Polymer Science, 1983

ABSTRACT

Research paper thumbnail of Crystal structure of the complex between class B3 beta-lactamase BJP-1 and 4-nitrobenzene-sulfonamide - new refinement

Research paper thumbnail of Crystal structure of CTX-M-15 extended-spectrum beta-lactamase in complex with avibactam (NXL104)

Research paper thumbnail of Heparinizable materials, 5. Preparation and FTIR characterization of polyurethane surfaces grafted with heparin-complexing poly(amido-amine) chains

Abstract The chains of poly (amido-amine)(1) were grafted on the surface of two different polyure... more Abstract The chains of poly (amido-amine)(1) were grafted on the surface of two different polyurethanes (2 and 3), one of which being a commercial product. All the chemical steps of the grafting reaction were monitored by chemical analysis and FTIR spectroscopy. The ...

Research paper thumbnail of Crystal Structure of FUS-1 (OXA-85), a Class D beta-lactamase from Fusobacterium nucleatum subsp. polymorphum

Research paper thumbnail of Uptake of metal ions from aqueous sulphuric acid by resins

Polymer, 1987

ABSTRACT The uptake capacity towards heavy metal ions in aqueous sulphuric acid of fourteen cross... more ABSTRACT The uptake capacity towards heavy metal ions in aqueous sulphuric acid of fourteen crosslinked polymer resins has been studied. Some resins contain poly(amido-amine)s or poly(amido-aminoacid)s crosslinked with 1,4-diaminobutane, others contain free NH2 or oxime groups on a tightly crosslinked structure. All the resins are highly swellable in sulphuric acid solution and, except for the resin containing oxime groups, degrade in a 7–20 days period. All the resins show capacity of retention for Ni2+ in 1.53 M sulphuric acid. The resins of the first group also show some selectivity towards several metal ions in this order: . The resin containing oxime as a donor group does not show such a selectivity, but does exhibit larger retention capacity. N.m.r. spectra indicate the presence of ion pairs in H2SO4 solution containing metal ions as M(HSO4)x − nn, vis. negative species, which are retained from the positively charged resins. For the resin containing oxime groups, the retention seems to occur via a coordination mechanism.

Research paper thumbnail of Crystal structure of native AmpC beta-lactamase from Pseudomonas aeruginosa PAO1

Research paper thumbnail of Crystal structure of class D Beta-lactamase OXA-48 in complex with meropenem

Research paper thumbnail of Crystal structure of class D Beta-lactamase OXA-48 in complex with ertapenem

Confinement plays an important role in preventing cracking and premature shear failure, increasin... more Confinement plays an important role in preventing cracking and premature shear failure, increasing the compressive strength and increasing the ductility of the element. One of the most efficient retrofitting methods is the reinforcement method with external restraints using high quality materials. Based on previous research, the use of external restraints using high quality materials can be in the form of steel wire mesh and wire rope restraints, and high-quality fiber such as CFRP (carbon fiber reinforced polymer). In this research, a study will be conducted to determine the effect of CFRP confinement reinforcement on a concrete cylinder that will be modeled with finite element software. The dimensions of the concrete cylinder used have a height of 300 mm and a diameter of 150 mm. The concrete cylinder is reinforced with CFRP with a thickness variation of 0.

Research paper thumbnail of Crystal structure of the VIM-2 acquired metallo-beta-Lactamase in Complex with compound 8 (JMV-7207)

Research paper thumbnail of Crystal structure of the VIM-2 acquired metallo-beta-Lactamase in Complex with compound 14 (JMV-6931)

Research paper thumbnail of Crystal structure of P104H mutant of SOD-like protein from Bacillus subtilis

Research paper thumbnail of Crystal structure of the double mutant Y88H-P104H of a SOD-like protein from Bacillus subtilis

Research paper thumbnail of Crystal structure of OXA-48 beta-lactamase

Research paper thumbnail of Crystal structure of the bromide adduct of AphA class B acid phosphatase/phosphotransferase from E. coli at 2.2 A resolution

Research paper thumbnail of Crystal Structure of an Engineered OXA-10 Variant with Carbapenemase Activity, OXA-10loop24

of Law for the invitation to write this Essay for the conference at Bar-Ilan on "Religious Perspe... more of Law for the invitation to write this Essay for the conference at Bar-Ilan on "Religious Perspectives on the Rule of Law." I received helpful comments and criticisms from participants in presentations or workshops at the Fourth Meeting of the International Consortium of Law and Religion Studies (iclars) at the

Research paper thumbnail of Acinetobacter baumanii OXA-24 complex with Avibactam

Research paper thumbnail of OXA-48 covalent complex with Avibactam inhibitor

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