Milan Fedurco - Academia.edu (original) (raw)

Papers by Milan Fedurco

Research paper thumbnail of Reinforcing metal or metallized whose surface is coated with a polybenzoxazine

Reinforcing metal or metallized whose surface is coated with a polybenzoxazine

Renfort metallique ou metallise, dont au moins la surface est au moins en partie metallique, au m... more Renfort metallique ou metallise, dont au moins la surface est au moins en partie metallique, au moins ladite partie metallique etant revetue d'une polybenzoxazine dont les unites recurrentes comportent au moins un motif repondant aux formules (I) ou (II) : dans lesquelles Z1 et Z2, identiques ou differents, representent un groupement de liaison au moins divalent, aliphatique, cycloaliphatique ou aromatique, comportant au moins un atome de carbone et optionnellement au moins un heteroatome choisi parmi O, S, N et P. Utilisation d'un tel renfort pour le renforcement d'un article en caoutchouc, en particulier un bandage pour vehicule automobile.

Research paper thumbnail of Graphenisation surface of a metal reinforcement or metallized by flame spray pyrolysis

Graphenisation surface of a metal reinforcement or metallized by flame spray pyrolysis

A process for depositing graphene parade on the surface of a metallic or metallic continuous rein... more A process for depositing graphene parade on the surface of a metallic or metallic continuous reinforcement at the periphery of which is arranged a surface layer of metal selected from copper, nickel and alloys of copper and nickel, said method comprising the least one projection by flame pyrolysis step ( "FSP" for flame Spray pyrolysis), under a reducing atmosphere, a carbon precursor into the flame generating at least one carbon-containing gas such as carbon monoxide, which is projected to the surface of the reinforcement being scrolled, and it decomposes to form one or more layers of graphene on the surface of the metal surface; an additional step of functionalizing the graphene allows adhering the reinforcement in a polymer matrix such as rubber.

Research paper thumbnail of Probe concentration and time dependence for the attachment of aminated oligonucleotides to BTA-derivatized slides monitored by hybridization using a TR-labeled oligonucleotide

Probe concentration and time dependence for the attachment of aminated oligonucleotides to BTA-derivatized slides monitored by hybridization using a TR-labeled oligonucleotide

<b>Copyright information:</b>Taken from "BTA, a novel reagent for DNA attachment... more <b>Copyright information:</b>Taken from "BTA, a novel reagent for DNA attachment on glass and efficient generation of solid-phase amplified DNA colonies"Nucleic Acids Research 2006;34(3):e22-e22.Published online 9 Feb 2006PMCID:PMC1363783.© The Author 2006. Published by Oxford University Press. All rights reserved () Concentration dependence for the grafting of 5′-amino-10T-P primer (34mer) on BTA glass. Grafting conditions: 10 mM EDC/10 mM 1-Methyl-imidazole (50°C)/1 h. Hybridization: 500 nM reverse-P-Texas Red in TMN buffer. The solid line is to guide the eye. Background fluorescence is subtracted. () Time dependence for the grafting of 5′amino-10T-SS-P primer on BTA glass. Grafting conditions: 1 µM primer, 10 mM EDC/10 mM 1-Methyl-Imidazole (50°C at different incubation times. Hybridization (circles), 500 nM reverse-P-Texas Red in TMN buffer. Denaturation (triangle): three times, 5 min at 80°C in 50% formamide (v/v in HO). Experimental data points are background subtracted.

Research paper thumbnail of Yield of DNA attachment using different cross-linkers between aminated slides (ATS) and modified oligonucleotides

Yield of DNA attachment using different cross-linkers between aminated slides (ATS) and modified oligonucleotides

<b>Copyright information:</b>Taken from "BTA, a novel reagent for DNA attachment... more <b>Copyright information:</b>Taken from "BTA, a novel reagent for DNA attachment on glass and efficient generation of solid-phase amplified DNA colonies"Nucleic Acids Research 2006;34(3):e22-e22.Published online 9 Feb 2006PMCID:PMC1363783.© The Author 2006. Published by Oxford University Press. All rights reserved Experiment is performed in one glass channel chip. The channels differ by the cross-linker used: First 3 channels are treated with s-MBS. Channels 4 to 6 are treated with TMA and 7–8 with BTA. The surfaces are then grafted and hybridized with the appropriate DNA material (see text for grafting and hybridization conditions).

Research paper thumbnail of Characterization of BTA-derivatized slides () Slide staining with NBD

Characterization of BTA-derivatized slides () Slide staining with NBD

<b>Copyright information:</b>Taken from "BTA, a novel reagent for DNA attachment... more <b>Copyright information:</b>Taken from "BTA, a novel reagent for DNA attachment on glass and efficient generation of solid-phase amplified DNA colonies"Nucleic Acids Research 2006;34(3):e22-e22.Published online 9 Feb 2006PMCID:PMC1363783.© The Author 2006. Published by Oxford University Press. All rights reserved Example of staining of aminosilanized (ATS) slides with (A) 4-fluoro-7-nitrobenzofurazan (NBD-F) and of BTA slides with (7-nitrobenzo-2-oxa-1,3-diazol-4-yl)ethylenediamine (NBD-NH), and corresponding negative controls. Fluorescence of NBD-modified slides was measured in air with 5 s acquisition time, using the optical filter xf22 from Omega. () Consecutive hybridizations using a complementary TR-labeled probe. Four successive treatments of hybridization-denaturation (1 to 4) of the Texas Red-labeled reverse-P1 primer (500 nM) shown for 5′-amino-10T-P1 primer (34mer) grafted at 1 µM for 60 min. Hybridization conditions: 500 nM Texas Red-labeled oligonucleotide in TMN buffer. Denaturation conditions: three times soaking in 50% formamide (v/v in HO) for 5 min at 80°C.

Research paper thumbnail of () Simplified diagram of steps required for glass functionalization with amino (ATS) and carboxyl (BTA) groups

() Simplified diagram of steps required for glass functionalization with amino (ATS) and carboxyl (BTA) groups

<b>Copyright information:</b>Taken from "BTA, a novel reagent for DNA attachment... more <b>Copyright information:</b>Taken from "BTA, a novel reagent for DNA attachment on glass and efficient generation of solid-phase amplified DNA colonies"Nucleic Acids Research 2006;34(3):e22-e22.Published online 9 Feb 2006PMCID:PMC1363783.© The Author 2006. Published by Oxford University Press. All rights reserved Staining of derivatized glass surfaces using NBD reagents of () aminated (ATS) and () carboxylated (BTA) glass slides.

Research paper thumbnail of Benzoxazine halogen used for the synthesis of polybenzoxazine

Benzoxazine halogen used for the synthesis of polybenzoxazine

Benzoxazine halogenated compound used in particular as monomer for the synthesis of polybenzoxazi... more Benzoxazine halogenated compound used in particular as monomer for the synthesis of polybenzoxazine, of formula (A): wherein: - each benzene nucleus is at least one halogen carrier (represented by the symbol Hal), in particular bromine, chlorine or fluorine; - Z1 represents a linking group at least divalent aliphatic, cycloaliphatic or aromatic, having at least one carbon atom and optionally at least one heteroatom selected from O, S, N and P. The use of such a compound for the synthesis of a polybenzoxazine, polybenzoxazine after at least such a benzoxazine compound.

Research paper thumbnail of Polymer used in particular as primary adhesion for bonding metal to rubber

Polymer used in particular as primary adhesion for bonding metal to rubber

Research paper thumbnail of Sulphur-Containing and Sulphonated Aromatic Perfluoroalkane Monomer

Sulphur-Containing and Sulphonated Aromatic Perfluoroalkane Monomer

Research paper thumbnail of Improved Method of Nucleotide Detection

Improved Method of Nucleotide Detection

Research paper thumbnail of Aromatic Perfluoroalkane Monomer

Aromatic Perfluoroalkane Monomer

ABSTRACT Aromatic perfluoroalkane monomer that can be used for the synthesis of a polymer membran... more ABSTRACT Aromatic perfluoroalkane monomer that can be used for the synthesis of a polymer membrane for a fuel cell of PEM type, corresponding to the formula (I): Z1 - Ar3 - C(O) - Ar1- (CF2)n - Ar2 - C(O) - Ar4 - Z2 in which: - n is within a range from 1 to 20; - the symbols Ar1, Ar2, Ar3 and Ar4, which may be identical or different, represent a substituted or unsubstituted phenylene group; - the symbols Z1 and Z2, which may be identical or different, represent an electrophilic or nucleophilic polymerizable function.

Research paper thumbnail of Single-crystal X-ray structure of Cââ·6SbPhâ. A well-ordered structure of Cââ and a new fullerene solvent

Single-crystal X-ray structure of Cââ·6SbPhâ. A well-ordered structure of Cââ and a new fullerene solvent

Inorg Chem, 1995

Research paper thumbnail of Polyurea that is particularly useful as an adhesion primer for adhering metal to rubber

Polyurea that is particularly useful as an adhesion primer for adhering metal to rubber

The present invention relates to urea units having at least the formula -NH-CO-NH-, and polyureas... more The present invention relates to urea units having at least the formula -NH-CO-NH-, and polyureas comprising additional monomers. The polyurea is characterized in that the additional unit comprises at least one secondary alcohol functional group and further comprises a secondary ether, thioether or amino functional group at the alpha position relative to the secondary alcohol functional group. The invention also relates to the use of such a polymer as an anti-corrosion protective coating for metal substrates, or as an adhesive primer for adhering a substrate, such as glass or metal, to an unsaturated rubber. The invention also relates to a metal reinforcement such as wire, cable, film or plate coated with a polymer according to the invention.

Research paper thumbnail of Modulatory Effects ofEschscholzia californicaAlkaloids on Recombinant GABAAReceptors

Biochemistry Research International, 2015

The California poppy (Eschscholzia californicaCham.) contains a variety of natural compounds incl... more The California poppy (Eschscholzia californicaCham.) contains a variety of natural compounds including several alkaloids found exclusively in this plant. Because of the sedative, anxiolytic, and analgesic effects, this herb is currently sold in pharmacies in many countries. However, our understanding of these biological effects at the molecular level is still lacking. Alkaloids detected inE. californicacould be hypothesized to act at GABAAreceptors, which are widely expressed in the brain mainly at the inhibitory interneurons. Electrophysiological studies on a recombinantα1β2γ2GABAAreceptor showed no effect ofN-methyllaurotetanine at concentrations lower than 30 μM. However, (S)-reticuline behaved as positive allosteric modulator at theα3,α5, andα6isoforms of GABAAreceptors. The depressant properties of aerial parts ofE. californicaare assigned to chloride-current modulation by (S)-reticuline at theα3β2γ2andα5β2γ2GABAAreceptors. Interestingly,α1,α3, andα5were not significantly affec...

Research paper thumbnail of Sulphur-Containing Triazine Monomer That Can Be Used for the Synthesis of a Polymer Membrane for a Fuel Cell

Sulphur-Containing Triazine Monomer That Can Be Used for the Synthesis of a Polymer Membrane for a Fuel Cell

Sulphur-containing triazine monomer that can be used for the synthesis of a polymer membrane for ... more Sulphur-containing triazine monomer that can be used for the synthesis of a polymer membrane for a fuel cell of PEM type, said monomer corresponding to the formula (I) in which: - the symbol Tz represents the 1,3,5-triazine ring; - the symbols X1 and X2, which may be identical or different, represent S, SO or SO2; - the symbols Ar1, Ar2, Ar4 and Ar5, which may be identical or different, represent a substituted or unsubstituted phenylene group; - the symbol Ar3 represents a substituted or unsubstituted phenyl group; - the symbols Z1 and Z2, which may be identical or different, are chosen from the group constituted by halogens, hydroxyl, alkoxyls, thiol, carboxyls, carboxylates, amino, sulphonamido, acyl chloride, sulphonyl chloride, sulphonyl fluoride, isocyanate and mixtures thereof.

Research paper thumbnail of Aromatic Perfluoroalkane Monomer

Aromatic Perfluoroalkane Monomer

Aromatic perfluoroalkane monomer that can be used for the synthesis of a polymer membrane for a f... more Aromatic perfluoroalkane monomer that can be used for the synthesis of a polymer membrane for a fuel cell of PEM type, corresponding to the formula (I): Z1 - Ar3 - C(O) - Ar1- (CF2)n - Ar2 - C(O) - Ar4 - Z2 in which: - n is within a range from 1 to 20; - the symbols Ar1, Ar2, Ar3 and Ar4, which may be identical or different, represent a substituted or unsubstituted phenylene group; - the symbols Z1 and Z2, which may be identical or different, represent an electrophilic or nucleophilic polymerizable function.

Research paper thumbnail of Triazine polymer that can be used as membrane in a fuel cell

Triazine polymer that can be used as membrane in a fuel cell

Triazine polymer comprising at least one plurality of base structural units comprising at least o... more Triazine polymer comprising at least one plurality of base structural units comprising at least one unit corresponding to the formula: in which: the symbols X1 and X2, which may be identical or different, represent S, SO or SO2; the symbols Ar1 and Ar2, which may be identical or different, represent a substituted or unsubstituted phenylene group; the symbol Ar3 represents a substituted or unsubstituted phenyl group; the symbol Tz represents the 1,3,5-triazine ring. This polymer of the invention, that can be used as an electrolyte in a PEM fuel cell, makes it possible to obtain membranes having high chemical and dimensional stability, and which also have a high ionic conductivity.

Research paper thumbnail of Oxygen - The Essential Environmental Component. As a Classical Electrochemical Element

Oxygen - The Essential Environmental Component. As a Classical Electrochemical Element

Research paper thumbnail of Application of spin trapping in the study of the electrochemical and photochemical synthesis of phenylated C60 derivatives with iodonium salts

Berichte der Bunsengesellschaft für physikalische Chemie, 1997

A spin trap technique was used to investigate the fullerene phenylation both electrochemically an... more A spin trap technique was used to investigate the fullerene phenylation both electrochemically and photochemically using the reactions of iodonium salts. Phenyl radicals, produced in the cathodic reduction as well as during the photolysis of iodonium salts, were trapped by nitroso-tert-butane ('BuNO) and nitrosodurene (ND) spin traps. However, no phenyl radicals could be detected by ESR during the irradiation of diphenyliodonium iodide, or during its electrochemical reduction, in the presence of C ,. This indicates that prior trapping of phenyl radicals to 'BuNO and ND spin trap agents, their trapping by fullerenes occurred. The radical mechanism of electrochemical and photochemical phenylation of C , using iodonium salts are discussed and these two phenylation techniques are compared.

Research paper thumbnail of The inhibiting effects of tetraalkylammonium cations on simple heterogeneous electron transfer reactions in polar aprotic solvents

The Journal of Physical Chemistry, 1992

In ref 59, the average tilt angle of the chain axes of cadmium arachidate monomolecular f h was r... more In ref 59, the average tilt angle of the chain axes of cadmium arachidate monomolecular f h was reported to be less than 15O as measured by NEXAFS. The reason for the difference between their result and the present one is unclear at preamt. Possible reaso~ may be the following: (i) difference in surface roughness of the solid substrates u s 4 (ii) different experimental conditions. for example, usc of buffer solution; or (iii) different techniques (NEXAFS vs FTIR-ATR).

Research paper thumbnail of Reinforcing metal or metallized whose surface is coated with a polybenzoxazine

Reinforcing metal or metallized whose surface is coated with a polybenzoxazine

Renfort metallique ou metallise, dont au moins la surface est au moins en partie metallique, au m... more Renfort metallique ou metallise, dont au moins la surface est au moins en partie metallique, au moins ladite partie metallique etant revetue d'une polybenzoxazine dont les unites recurrentes comportent au moins un motif repondant aux formules (I) ou (II) : dans lesquelles Z1 et Z2, identiques ou differents, representent un groupement de liaison au moins divalent, aliphatique, cycloaliphatique ou aromatique, comportant au moins un atome de carbone et optionnellement au moins un heteroatome choisi parmi O, S, N et P. Utilisation d'un tel renfort pour le renforcement d'un article en caoutchouc, en particulier un bandage pour vehicule automobile.

Research paper thumbnail of Graphenisation surface of a metal reinforcement or metallized by flame spray pyrolysis

Graphenisation surface of a metal reinforcement or metallized by flame spray pyrolysis

A process for depositing graphene parade on the surface of a metallic or metallic continuous rein... more A process for depositing graphene parade on the surface of a metallic or metallic continuous reinforcement at the periphery of which is arranged a surface layer of metal selected from copper, nickel and alloys of copper and nickel, said method comprising the least one projection by flame pyrolysis step ( "FSP" for flame Spray pyrolysis), under a reducing atmosphere, a carbon precursor into the flame generating at least one carbon-containing gas such as carbon monoxide, which is projected to the surface of the reinforcement being scrolled, and it decomposes to form one or more layers of graphene on the surface of the metal surface; an additional step of functionalizing the graphene allows adhering the reinforcement in a polymer matrix such as rubber.

Research paper thumbnail of Probe concentration and time dependence for the attachment of aminated oligonucleotides to BTA-derivatized slides monitored by hybridization using a TR-labeled oligonucleotide

Probe concentration and time dependence for the attachment of aminated oligonucleotides to BTA-derivatized slides monitored by hybridization using a TR-labeled oligonucleotide

<b>Copyright information:</b>Taken from "BTA, a novel reagent for DNA attachment... more <b>Copyright information:</b>Taken from "BTA, a novel reagent for DNA attachment on glass and efficient generation of solid-phase amplified DNA colonies"Nucleic Acids Research 2006;34(3):e22-e22.Published online 9 Feb 2006PMCID:PMC1363783.© The Author 2006. Published by Oxford University Press. All rights reserved () Concentration dependence for the grafting of 5′-amino-10T-P primer (34mer) on BTA glass. Grafting conditions: 10 mM EDC/10 mM 1-Methyl-imidazole (50°C)/1 h. Hybridization: 500 nM reverse-P-Texas Red in TMN buffer. The solid line is to guide the eye. Background fluorescence is subtracted. () Time dependence for the grafting of 5′amino-10T-SS-P primer on BTA glass. Grafting conditions: 1 µM primer, 10 mM EDC/10 mM 1-Methyl-Imidazole (50°C at different incubation times. Hybridization (circles), 500 nM reverse-P-Texas Red in TMN buffer. Denaturation (triangle): three times, 5 min at 80°C in 50% formamide (v/v in HO). Experimental data points are background subtracted.

Research paper thumbnail of Yield of DNA attachment using different cross-linkers between aminated slides (ATS) and modified oligonucleotides

Yield of DNA attachment using different cross-linkers between aminated slides (ATS) and modified oligonucleotides

<b>Copyright information:</b>Taken from "BTA, a novel reagent for DNA attachment... more <b>Copyright information:</b>Taken from "BTA, a novel reagent for DNA attachment on glass and efficient generation of solid-phase amplified DNA colonies"Nucleic Acids Research 2006;34(3):e22-e22.Published online 9 Feb 2006PMCID:PMC1363783.© The Author 2006. Published by Oxford University Press. All rights reserved Experiment is performed in one glass channel chip. The channels differ by the cross-linker used: First 3 channels are treated with s-MBS. Channels 4 to 6 are treated with TMA and 7–8 with BTA. The surfaces are then grafted and hybridized with the appropriate DNA material (see text for grafting and hybridization conditions).

Research paper thumbnail of Characterization of BTA-derivatized slides () Slide staining with NBD

Characterization of BTA-derivatized slides () Slide staining with NBD

<b>Copyright information:</b>Taken from "BTA, a novel reagent for DNA attachment... more <b>Copyright information:</b>Taken from "BTA, a novel reagent for DNA attachment on glass and efficient generation of solid-phase amplified DNA colonies"Nucleic Acids Research 2006;34(3):e22-e22.Published online 9 Feb 2006PMCID:PMC1363783.© The Author 2006. Published by Oxford University Press. All rights reserved Example of staining of aminosilanized (ATS) slides with (A) 4-fluoro-7-nitrobenzofurazan (NBD-F) and of BTA slides with (7-nitrobenzo-2-oxa-1,3-diazol-4-yl)ethylenediamine (NBD-NH), and corresponding negative controls. Fluorescence of NBD-modified slides was measured in air with 5 s acquisition time, using the optical filter xf22 from Omega. () Consecutive hybridizations using a complementary TR-labeled probe. Four successive treatments of hybridization-denaturation (1 to 4) of the Texas Red-labeled reverse-P1 primer (500 nM) shown for 5′-amino-10T-P1 primer (34mer) grafted at 1 µM for 60 min. Hybridization conditions: 500 nM Texas Red-labeled oligonucleotide in TMN buffer. Denaturation conditions: three times soaking in 50% formamide (v/v in HO) for 5 min at 80°C.

Research paper thumbnail of () Simplified diagram of steps required for glass functionalization with amino (ATS) and carboxyl (BTA) groups

() Simplified diagram of steps required for glass functionalization with amino (ATS) and carboxyl (BTA) groups

<b>Copyright information:</b>Taken from "BTA, a novel reagent for DNA attachment... more <b>Copyright information:</b>Taken from "BTA, a novel reagent for DNA attachment on glass and efficient generation of solid-phase amplified DNA colonies"Nucleic Acids Research 2006;34(3):e22-e22.Published online 9 Feb 2006PMCID:PMC1363783.© The Author 2006. Published by Oxford University Press. All rights reserved Staining of derivatized glass surfaces using NBD reagents of () aminated (ATS) and () carboxylated (BTA) glass slides.

Research paper thumbnail of Benzoxazine halogen used for the synthesis of polybenzoxazine

Benzoxazine halogen used for the synthesis of polybenzoxazine

Benzoxazine halogenated compound used in particular as monomer for the synthesis of polybenzoxazi... more Benzoxazine halogenated compound used in particular as monomer for the synthesis of polybenzoxazine, of formula (A): wherein: - each benzene nucleus is at least one halogen carrier (represented by the symbol Hal), in particular bromine, chlorine or fluorine; - Z1 represents a linking group at least divalent aliphatic, cycloaliphatic or aromatic, having at least one carbon atom and optionally at least one heteroatom selected from O, S, N and P. The use of such a compound for the synthesis of a polybenzoxazine, polybenzoxazine after at least such a benzoxazine compound.

Research paper thumbnail of Polymer used in particular as primary adhesion for bonding metal to rubber

Polymer used in particular as primary adhesion for bonding metal to rubber

Research paper thumbnail of Sulphur-Containing and Sulphonated Aromatic Perfluoroalkane Monomer

Sulphur-Containing and Sulphonated Aromatic Perfluoroalkane Monomer

Research paper thumbnail of Improved Method of Nucleotide Detection

Improved Method of Nucleotide Detection

Research paper thumbnail of Aromatic Perfluoroalkane Monomer

Aromatic Perfluoroalkane Monomer

ABSTRACT Aromatic perfluoroalkane monomer that can be used for the synthesis of a polymer membran... more ABSTRACT Aromatic perfluoroalkane monomer that can be used for the synthesis of a polymer membrane for a fuel cell of PEM type, corresponding to the formula (I): Z1 - Ar3 - C(O) - Ar1- (CF2)n - Ar2 - C(O) - Ar4 - Z2 in which: - n is within a range from 1 to 20; - the symbols Ar1, Ar2, Ar3 and Ar4, which may be identical or different, represent a substituted or unsubstituted phenylene group; - the symbols Z1 and Z2, which may be identical or different, represent an electrophilic or nucleophilic polymerizable function.

Research paper thumbnail of Single-crystal X-ray structure of Cââ·6SbPhâ. A well-ordered structure of Cââ and a new fullerene solvent

Single-crystal X-ray structure of Cââ·6SbPhâ. A well-ordered structure of Cââ and a new fullerene solvent

Inorg Chem, 1995

Research paper thumbnail of Polyurea that is particularly useful as an adhesion primer for adhering metal to rubber

Polyurea that is particularly useful as an adhesion primer for adhering metal to rubber

The present invention relates to urea units having at least the formula -NH-CO-NH-, and polyureas... more The present invention relates to urea units having at least the formula -NH-CO-NH-, and polyureas comprising additional monomers. The polyurea is characterized in that the additional unit comprises at least one secondary alcohol functional group and further comprises a secondary ether, thioether or amino functional group at the alpha position relative to the secondary alcohol functional group. The invention also relates to the use of such a polymer as an anti-corrosion protective coating for metal substrates, or as an adhesive primer for adhering a substrate, such as glass or metal, to an unsaturated rubber. The invention also relates to a metal reinforcement such as wire, cable, film or plate coated with a polymer according to the invention.

Research paper thumbnail of Modulatory Effects ofEschscholzia californicaAlkaloids on Recombinant GABAAReceptors

Biochemistry Research International, 2015

The California poppy (Eschscholzia californicaCham.) contains a variety of natural compounds incl... more The California poppy (Eschscholzia californicaCham.) contains a variety of natural compounds including several alkaloids found exclusively in this plant. Because of the sedative, anxiolytic, and analgesic effects, this herb is currently sold in pharmacies in many countries. However, our understanding of these biological effects at the molecular level is still lacking. Alkaloids detected inE. californicacould be hypothesized to act at GABAAreceptors, which are widely expressed in the brain mainly at the inhibitory interneurons. Electrophysiological studies on a recombinantα1β2γ2GABAAreceptor showed no effect ofN-methyllaurotetanine at concentrations lower than 30 μM. However, (S)-reticuline behaved as positive allosteric modulator at theα3,α5, andα6isoforms of GABAAreceptors. The depressant properties of aerial parts ofE. californicaare assigned to chloride-current modulation by (S)-reticuline at theα3β2γ2andα5β2γ2GABAAreceptors. Interestingly,α1,α3, andα5were not significantly affec...

Research paper thumbnail of Sulphur-Containing Triazine Monomer That Can Be Used for the Synthesis of a Polymer Membrane for a Fuel Cell

Sulphur-Containing Triazine Monomer That Can Be Used for the Synthesis of a Polymer Membrane for a Fuel Cell

Sulphur-containing triazine monomer that can be used for the synthesis of a polymer membrane for ... more Sulphur-containing triazine monomer that can be used for the synthesis of a polymer membrane for a fuel cell of PEM type, said monomer corresponding to the formula (I) in which: - the symbol Tz represents the 1,3,5-triazine ring; - the symbols X1 and X2, which may be identical or different, represent S, SO or SO2; - the symbols Ar1, Ar2, Ar4 and Ar5, which may be identical or different, represent a substituted or unsubstituted phenylene group; - the symbol Ar3 represents a substituted or unsubstituted phenyl group; - the symbols Z1 and Z2, which may be identical or different, are chosen from the group constituted by halogens, hydroxyl, alkoxyls, thiol, carboxyls, carboxylates, amino, sulphonamido, acyl chloride, sulphonyl chloride, sulphonyl fluoride, isocyanate and mixtures thereof.

Research paper thumbnail of Aromatic Perfluoroalkane Monomer

Aromatic Perfluoroalkane Monomer

Aromatic perfluoroalkane monomer that can be used for the synthesis of a polymer membrane for a f... more Aromatic perfluoroalkane monomer that can be used for the synthesis of a polymer membrane for a fuel cell of PEM type, corresponding to the formula (I): Z1 - Ar3 - C(O) - Ar1- (CF2)n - Ar2 - C(O) - Ar4 - Z2 in which: - n is within a range from 1 to 20; - the symbols Ar1, Ar2, Ar3 and Ar4, which may be identical or different, represent a substituted or unsubstituted phenylene group; - the symbols Z1 and Z2, which may be identical or different, represent an electrophilic or nucleophilic polymerizable function.

Research paper thumbnail of Triazine polymer that can be used as membrane in a fuel cell

Triazine polymer that can be used as membrane in a fuel cell

Triazine polymer comprising at least one plurality of base structural units comprising at least o... more Triazine polymer comprising at least one plurality of base structural units comprising at least one unit corresponding to the formula: in which: the symbols X1 and X2, which may be identical or different, represent S, SO or SO2; the symbols Ar1 and Ar2, which may be identical or different, represent a substituted or unsubstituted phenylene group; the symbol Ar3 represents a substituted or unsubstituted phenyl group; the symbol Tz represents the 1,3,5-triazine ring. This polymer of the invention, that can be used as an electrolyte in a PEM fuel cell, makes it possible to obtain membranes having high chemical and dimensional stability, and which also have a high ionic conductivity.

Research paper thumbnail of Oxygen - The Essential Environmental Component. As a Classical Electrochemical Element

Oxygen - The Essential Environmental Component. As a Classical Electrochemical Element

Research paper thumbnail of Application of spin trapping in the study of the electrochemical and photochemical synthesis of phenylated C60 derivatives with iodonium salts

Berichte der Bunsengesellschaft für physikalische Chemie, 1997

A spin trap technique was used to investigate the fullerene phenylation both electrochemically an... more A spin trap technique was used to investigate the fullerene phenylation both electrochemically and photochemically using the reactions of iodonium salts. Phenyl radicals, produced in the cathodic reduction as well as during the photolysis of iodonium salts, were trapped by nitroso-tert-butane ('BuNO) and nitrosodurene (ND) spin traps. However, no phenyl radicals could be detected by ESR during the irradiation of diphenyliodonium iodide, or during its electrochemical reduction, in the presence of C ,. This indicates that prior trapping of phenyl radicals to 'BuNO and ND spin trap agents, their trapping by fullerenes occurred. The radical mechanism of electrochemical and photochemical phenylation of C , using iodonium salts are discussed and these two phenylation techniques are compared.

Research paper thumbnail of The inhibiting effects of tetraalkylammonium cations on simple heterogeneous electron transfer reactions in polar aprotic solvents

The Journal of Physical Chemistry, 1992

In ref 59, the average tilt angle of the chain axes of cadmium arachidate monomolecular f h was r... more In ref 59, the average tilt angle of the chain axes of cadmium arachidate monomolecular f h was reported to be less than 15O as measured by NEXAFS. The reason for the difference between their result and the present one is unclear at preamt. Possible reaso~ may be the following: (i) difference in surface roughness of the solid substrates u s 4 (ii) different experimental conditions. for example, usc of buffer solution; or (iii) different techniques (NEXAFS vs FTIR-ATR).