Gustavo Avitabile | Università degli Studi di Napoli "Federico II" (original) (raw)

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Papers by Gustavo Avitabile

Research paper thumbnail of Designing Courses on the Nature and History of Science

Research paper thumbnail of Crystal and molecular structure of α,α',α,α'-tetramethyl-β-ketoglutaric acid (triclinic modification). A model of polydimethylketene with ketonic enchainment

Acta Crystallographica Section B Structural Crystallography and Crystal Chemistry, 1969

Research paper thumbnail of Low temperature crystal structure of polyethylene: Results from a neutron diffraction study and from potential energy calculations

Journal of Polymer Science: Polymer Letters Edition, 1975

Research paper thumbnail of ChemInform Abstract: KRISTALL- UND MOLEKULARSTRUKTUR VON ALPHA,ALPHA,ALPHA′,ALPHA′-TETRAMETHYL-BETA-KETO-GLUTARSAEURE (I) (TRIKLINE MODIFIKATION), EIN MODELL VON POLYDIMETHYLKETEN MIT KETONISCHE VERKETTUNG

Chemischer Informationsdienst. Organische Chemie, 1970

Research paper thumbnail of Crystal and molecular structure of beta-ketoglutaric acid

La Ricerca Scientifica, Mar 1, 1967

Research paper thumbnail of ChemInform Abstract: POLYEN-MAKROLID-ANTIBIOTIKUM AMPHOTERICIN B, KRISTALLSTRUKTUR DES N-JODACETYL-DERIVATS

Chemischer Informationsdienst. Organische Chemie, 1971

Research paper thumbnail of Crystal and molecular structure of 1,3,5,7-tetramethylcycloocta-cis,cis,cis-1,3,5,7-tetraene

The Journal of Physical Chemistry

Research paper thumbnail of Applicazioni degli Elaboratori nella Didattica (AED) della Fisica elementare e dell'Informatica di base: un' esperienza nella scuola secondaria superiore

Research paper thumbnail of Formazione in informatica e formazione disciplinare, l'unità didattica Gravità

Research paper thumbnail of Termogas. Unità didattica sulle trasformazioni termodinamiche del gas ideale

Research paper thumbnail of Crystal and molecular structure of beta-ketoglutaric acid

La Ricerca scientifica, 1967

Research paper thumbnail of Modeling the structure of chain‐molecule liquids: A computer simulation of the n‐alkanes C8–C30

Computer models of a series of liquid n-alkanes were generated, allowing for continuous variation... more Computer models of a series of liquid n-alkanes were generated, allowing for continuous variation of torsion angles and of atomic positions. Torsional and intramolecular and intermolecular nonbonded potentials were introduced. Calculated fractions of gauche bonds are slightly higher than those calculated from a rotational isomeric state model. Calculated radial distribution functions exhibit peaks in good agreement with experimental data. No directional correlation between chains is found, except a t very short distances. Calculated end-to-end distances and radii of gyration indicate random coil conformations. These results are unaffected by extension of the range of interaction to the attractive region and by variations of temperature and density. 1 V(cp) =-V , [ X (1 + C O S~~) + (1x) (1 + cos 3cp)] 2

Research paper thumbnail of Computer assisted learning: a graphic dialogue on Schroedinger's equation

ACM Sigcue Outlook, 1981

SCHROE, a graphic interactive program, studies the one-dimensional time-independent Schroedinger&... more SCHROE, a graphic interactive program, studies the one-dimensional time-independent Schroedinger's equation for three symmetrical potentials: infinite depth square well, harmonic oscillator, anharmonic oscillator.The student enters an energy value and obtains the plot of the unnormalized solution of the equation, computed by the "middle point" numerical integration method. By visual analysis of the plot of the solution displayed on the terminal

Research paper thumbnail of A computer model of molecular arrangement in a n‐paraffinic liquid

The Journal of Chemical Physics, 1980

ABSTRACT A computer model of a bulk liquid polymer was built to investigate the problem of local ... more ABSTRACT A computer model of a bulk liquid polymer was built to investigate the problem of local order. The model is made of C30 n‐alkane molecules; it is not a lattice model, but it allows for a continuous variability of torsion angles and interchain distances, subject to realistic intra‐ and intermolecular potentials. Experimental x‐ray scattering curves and radial distribution functions are well reproduced. Calculated properties like end‐to‐end distances, distribution of torsion angles, radial distribution functions, and chain direction correlation parameters, all indicate a random coil conformation and no tendency to form bundles of parallel chains.

Research paper thumbnail of Synthesis, structure, and reactions of a benziodolium cation

The Journal of Organic …, 1972

... F. l/IARSHALL BERINGER,” PAOLO GANIS,~ GUSTAVO AVITABILE,~ ... The C=C ir stretching bands in... more ... F. l/IARSHALL BERINGER,” PAOLO GANIS,~ GUSTAVO AVITABILE,~ ... The C=C ir stretching bands in both 2 and 3 are very weak or absent as expected for tetrasubstituted olefins.' (1) On sabbatical leave from Universitk Di Napoli, V. Mezzocannone 4, 80134 Napoli, Italy, 1969 ...

Research paper thumbnail of Polyene macrolide antibiotic amphotericin B. Crystal structure of the N-iodoacetyl derivative

Journal of the …, 1971

... Paolo Ganis,* 2,8 Gustavo Avitabile,*v4 Witold Mechlin~ki,*~ and Carl P. Schaffner5 ... (2) P... more ... Paolo Ganis,* 2,8 Gustavo Avitabile,*v4 Witold Mechlin~ki,*~ and Carl P. Schaffner5 ... (2) Polytechnic Institute of Brooklyn. (3) On sabbatical leave from Universita' di Napoli, Istituto Chimico, (4) Postdoctoral Fellow on leave from Universita' di Napoli, (5) Institute of Microbiology. ...

Research paper thumbnail of Structure and absolute configuration of the polyene macrolide antibiotic amphotericin B

Tetrahedron Letters, 1970

Research paper thumbnail of Configurational Statistics of Polyethylene Chains

Chemical Physics, 1972

A mathematical procedure is described to handle the configurational statistics of a chain placed ... more A mathematical procedure is described to handle the configurational statistics of a chain placed on a rigid lattice, allowing for first-neighbor interaction between consecutive rotational states. Many statistics connected with chain bonds orientation with respect to a fixed reference frame are calculated easily. Assuming a diamond lattice, results are reported for polyethylene chains with different lengths: They include the W

Research paper thumbnail of La ricerca a Napoli sulle applicazioni dell'elaboratore nella didattica della fisica

Research paper thumbnail of The crystal structure of β-phenylglutaric acid, a model compound of polystyrene

J. Chem. Soc. D

The molecules of p-phenylglutaric acid in the crystal are linked in rows through hydrogen bonds; ... more The molecules of p-phenylglutaric acid in the crystal are linked in rows through hydrogen bonds; the rows are characterized by glide-plane symmetry.

Research paper thumbnail of Designing Courses on the Nature and History of Science

Research paper thumbnail of Crystal and molecular structure of α,α',α,α'-tetramethyl-β-ketoglutaric acid (triclinic modification). A model of polydimethylketene with ketonic enchainment

Acta Crystallographica Section B Structural Crystallography and Crystal Chemistry, 1969

Research paper thumbnail of Low temperature crystal structure of polyethylene: Results from a neutron diffraction study and from potential energy calculations

Journal of Polymer Science: Polymer Letters Edition, 1975

Research paper thumbnail of ChemInform Abstract: KRISTALL- UND MOLEKULARSTRUKTUR VON ALPHA,ALPHA,ALPHA′,ALPHA′-TETRAMETHYL-BETA-KETO-GLUTARSAEURE (I) (TRIKLINE MODIFIKATION), EIN MODELL VON POLYDIMETHYLKETEN MIT KETONISCHE VERKETTUNG

Chemischer Informationsdienst. Organische Chemie, 1970

Research paper thumbnail of Crystal and molecular structure of beta-ketoglutaric acid

La Ricerca Scientifica, Mar 1, 1967

Research paper thumbnail of ChemInform Abstract: POLYEN-MAKROLID-ANTIBIOTIKUM AMPHOTERICIN B, KRISTALLSTRUKTUR DES N-JODACETYL-DERIVATS

Chemischer Informationsdienst. Organische Chemie, 1971

Research paper thumbnail of Crystal and molecular structure of 1,3,5,7-tetramethylcycloocta-cis,cis,cis-1,3,5,7-tetraene

The Journal of Physical Chemistry

Research paper thumbnail of Applicazioni degli Elaboratori nella Didattica (AED) della Fisica elementare e dell'Informatica di base: un' esperienza nella scuola secondaria superiore

Research paper thumbnail of Formazione in informatica e formazione disciplinare, l'unità didattica Gravità

Research paper thumbnail of Termogas. Unità didattica sulle trasformazioni termodinamiche del gas ideale

Research paper thumbnail of Crystal and molecular structure of beta-ketoglutaric acid

La Ricerca scientifica, 1967

Research paper thumbnail of Modeling the structure of chain‐molecule liquids: A computer simulation of the n‐alkanes C8–C30

Computer models of a series of liquid n-alkanes were generated, allowing for continuous variation... more Computer models of a series of liquid n-alkanes were generated, allowing for continuous variation of torsion angles and of atomic positions. Torsional and intramolecular and intermolecular nonbonded potentials were introduced. Calculated fractions of gauche bonds are slightly higher than those calculated from a rotational isomeric state model. Calculated radial distribution functions exhibit peaks in good agreement with experimental data. No directional correlation between chains is found, except a t very short distances. Calculated end-to-end distances and radii of gyration indicate random coil conformations. These results are unaffected by extension of the range of interaction to the attractive region and by variations of temperature and density. 1 V(cp) =-V , [ X (1 + C O S~~) + (1x) (1 + cos 3cp)] 2

Research paper thumbnail of Computer assisted learning: a graphic dialogue on Schroedinger's equation

ACM Sigcue Outlook, 1981

SCHROE, a graphic interactive program, studies the one-dimensional time-independent Schroedinger&... more SCHROE, a graphic interactive program, studies the one-dimensional time-independent Schroedinger's equation for three symmetrical potentials: infinite depth square well, harmonic oscillator, anharmonic oscillator.The student enters an energy value and obtains the plot of the unnormalized solution of the equation, computed by the "middle point" numerical integration method. By visual analysis of the plot of the solution displayed on the terminal

Research paper thumbnail of A computer model of molecular arrangement in a n‐paraffinic liquid

The Journal of Chemical Physics, 1980

ABSTRACT A computer model of a bulk liquid polymer was built to investigate the problem of local ... more ABSTRACT A computer model of a bulk liquid polymer was built to investigate the problem of local order. The model is made of C30 n‐alkane molecules; it is not a lattice model, but it allows for a continuous variability of torsion angles and interchain distances, subject to realistic intra‐ and intermolecular potentials. Experimental x‐ray scattering curves and radial distribution functions are well reproduced. Calculated properties like end‐to‐end distances, distribution of torsion angles, radial distribution functions, and chain direction correlation parameters, all indicate a random coil conformation and no tendency to form bundles of parallel chains.

Research paper thumbnail of Synthesis, structure, and reactions of a benziodolium cation

The Journal of Organic …, 1972

... F. l/IARSHALL BERINGER,” PAOLO GANIS,~ GUSTAVO AVITABILE,~ ... The C=C ir stretching bands in... more ... F. l/IARSHALL BERINGER,” PAOLO GANIS,~ GUSTAVO AVITABILE,~ ... The C=C ir stretching bands in both 2 and 3 are very weak or absent as expected for tetrasubstituted olefins.' (1) On sabbatical leave from Universitk Di Napoli, V. Mezzocannone 4, 80134 Napoli, Italy, 1969 ...

Research paper thumbnail of Polyene macrolide antibiotic amphotericin B. Crystal structure of the N-iodoacetyl derivative

Journal of the …, 1971

... Paolo Ganis,* 2,8 Gustavo Avitabile,*v4 Witold Mechlin~ki,*~ and Carl P. Schaffner5 ... (2) P... more ... Paolo Ganis,* 2,8 Gustavo Avitabile,*v4 Witold Mechlin~ki,*~ and Carl P. Schaffner5 ... (2) Polytechnic Institute of Brooklyn. (3) On sabbatical leave from Universita' di Napoli, Istituto Chimico, (4) Postdoctoral Fellow on leave from Universita' di Napoli, (5) Institute of Microbiology. ...

Research paper thumbnail of Structure and absolute configuration of the polyene macrolide antibiotic amphotericin B

Tetrahedron Letters, 1970

Research paper thumbnail of Configurational Statistics of Polyethylene Chains

Chemical Physics, 1972

A mathematical procedure is described to handle the configurational statistics of a chain placed ... more A mathematical procedure is described to handle the configurational statistics of a chain placed on a rigid lattice, allowing for first-neighbor interaction between consecutive rotational states. Many statistics connected with chain bonds orientation with respect to a fixed reference frame are calculated easily. Assuming a diamond lattice, results are reported for polyethylene chains with different lengths: They include the W

Research paper thumbnail of La ricerca a Napoli sulle applicazioni dell'elaboratore nella didattica della fisica

Research paper thumbnail of The crystal structure of β-phenylglutaric acid, a model compound of polystyrene

J. Chem. Soc. D

The molecules of p-phenylglutaric acid in the crystal are linked in rows through hydrogen bonds; ... more The molecules of p-phenylglutaric acid in the crystal are linked in rows through hydrogen bonds; the rows are characterized by glide-plane symmetry.