The Experts below are selected from a list of 225 Experts worldwide ranked by ideXlab platform
Osamu Onomura - One of the best experts on this subject based on the ideXlab platform.
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Efficient Oxidation of Adamantanes by Sodium Nitrite with Molecular Oxygen in Trifluoroacetic Acid
Synlett, 2006Co-Authors: Osamu Onomura, Noriaki Moriyama, Yutaka Yamamoto, Fumiaki Iwasaki, Yoshihiro MatsumuraAbstract:Oxidation of adamantanes by oxygen was effectively achieved by use of Sodium Nitrite as a catalyst in trifluoroacetic acid (TFA) to give 1-adamantyl trifluoroacetates, from which adamantanols were obtained in good yields. A catalytic amount of Sodium Nitrite was essential and TFA was the best solvent among solvents examined for this oxidation.
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efficient oxidation of cycloalkanols by Sodium Nitrite with molecular oxygen in trifluoroacetic acid
Tetrahedron Letters, 2004Co-Authors: Yoshihiro Matsumura, Yutaka Yamamoto, Noriaki Moriyama, Shigeru Furukubo, Fumiaki Iwasaki, Osamu OnomuraAbstract:Abstract Oxidation of aliphatic cycloalkanols by Sodium Nitrite in trifluoroacetic acid gave α,ω-dicarboxylic acids in good yields. Adipic acid was obtained in a quantitative yield from cyclohexanol using 1 equiv of Sodium Nitrite under oxygen atmosphere but the oxidation required more than 3 equiv of Sodium Nitrite under nitrogen atmosphere. The oxidation method was applicable to the conversion of 1-alkanols to the corresponding carboxylic acids.
Stefaan De Smet - One of the best experts on this subject based on the ideXlab platform.
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effect of Sodium ascorbate and Sodium Nitrite on protein and lipid oxidation in dry fermented sausages
Meat Science, 2016Co-Authors: Alberto Berardo, Hannelore De Maere, Despoina Angeliki Stavropoulou, Tine Rysman, Frédéric Leroy, Stefaan De SmetAbstract:The effects of Sodium Nitrite and ascorbate on lipid and protein oxidation were studied during the ripening process of dry fermented sausages. Samples were taken at day 0, 2, 8, 14, 21 and 28 of ripening to assess lipid (malondialdehyde) and protein (carbonyls and sulfhydryl groups) oxidation. Sodium ascorbate and Nitrite were separately able to reduce the formation of malondialdehyde. Their combined addition resulted in higher amounts of carbonyl compounds compared to their separate addition or the treatment without any of both compounds. Moreover, Sodium Nitrite limited the formation of γ-glutamic semialdehyde whereas Sodium ascorbate showed a pro-oxidant effect. A loss of thiol groups was observed during ripening, which was not affected by the use of Sodium ascorbate nor Sodium Nitrite. In conclusion, Sodium Nitrite and ascorbate affected protein and lipid oxidation in different manners. The possible pro-oxidant effect of their combined addition on carbonyl formation might influence the technological and sensory properties of these products.
Yoshihiro Matsumura - One of the best experts on this subject based on the ideXlab platform.
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Efficient Oxidation of Adamantanes by Sodium Nitrite with Molecular Oxygen in Trifluoroacetic Acid
Synlett, 2006Co-Authors: Osamu Onomura, Noriaki Moriyama, Yutaka Yamamoto, Fumiaki Iwasaki, Yoshihiro MatsumuraAbstract:Oxidation of adamantanes by oxygen was effectively achieved by use of Sodium Nitrite as a catalyst in trifluoroacetic acid (TFA) to give 1-adamantyl trifluoroacetates, from which adamantanols were obtained in good yields. A catalytic amount of Sodium Nitrite was essential and TFA was the best solvent among solvents examined for this oxidation.
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efficient oxidation of cycloalkanols by Sodium Nitrite with molecular oxygen in trifluoroacetic acid
Tetrahedron Letters, 2004Co-Authors: Yoshihiro Matsumura, Yutaka Yamamoto, Noriaki Moriyama, Shigeru Furukubo, Fumiaki Iwasaki, Osamu OnomuraAbstract:Abstract Oxidation of aliphatic cycloalkanols by Sodium Nitrite in trifluoroacetic acid gave α,ω-dicarboxylic acids in good yields. Adipic acid was obtained in a quantitative yield from cyclohexanol using 1 equiv of Sodium Nitrite under oxygen atmosphere but the oxidation required more than 3 equiv of Sodium Nitrite under nitrogen atmosphere. The oxidation method was applicable to the conversion of 1-alkanols to the corresponding carboxylic acids.
Alberto Berardo - One of the best experts on this subject based on the ideXlab platform.
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effect of Sodium ascorbate and Sodium Nitrite on protein and lipid oxidation in dry fermented sausages
Meat Science, 2016Co-Authors: Alberto Berardo, Hannelore De Maere, Despoina Angeliki Stavropoulou, Tine Rysman, Frédéric Leroy, Stefaan De SmetAbstract:The effects of Sodium Nitrite and ascorbate on lipid and protein oxidation were studied during the ripening process of dry fermented sausages. Samples were taken at day 0, 2, 8, 14, 21 and 28 of ripening to assess lipid (malondialdehyde) and protein (carbonyls and sulfhydryl groups) oxidation. Sodium ascorbate and Nitrite were separately able to reduce the formation of malondialdehyde. Their combined addition resulted in higher amounts of carbonyl compounds compared to their separate addition or the treatment without any of both compounds. Moreover, Sodium Nitrite limited the formation of γ-glutamic semialdehyde whereas Sodium ascorbate showed a pro-oxidant effect. A loss of thiol groups was observed during ripening, which was not affected by the use of Sodium ascorbate nor Sodium Nitrite. In conclusion, Sodium Nitrite and ascorbate affected protein and lipid oxidation in different manners. The possible pro-oxidant effect of their combined addition on carbonyl formation might influence the technological and sensory properties of these products.
Noriaki Moriyama - One of the best experts on this subject based on the ideXlab platform.
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Efficient Oxidation of Adamantanes by Sodium Nitrite with Molecular Oxygen in Trifluoroacetic Acid
Synlett, 2006Co-Authors: Osamu Onomura, Noriaki Moriyama, Yutaka Yamamoto, Fumiaki Iwasaki, Yoshihiro MatsumuraAbstract:Oxidation of adamantanes by oxygen was effectively achieved by use of Sodium Nitrite as a catalyst in trifluoroacetic acid (TFA) to give 1-adamantyl trifluoroacetates, from which adamantanols were obtained in good yields. A catalytic amount of Sodium Nitrite was essential and TFA was the best solvent among solvents examined for this oxidation.
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efficient oxidation of cycloalkanols by Sodium Nitrite with molecular oxygen in trifluoroacetic acid
Tetrahedron Letters, 2004Co-Authors: Yoshihiro Matsumura, Yutaka Yamamoto, Noriaki Moriyama, Shigeru Furukubo, Fumiaki Iwasaki, Osamu OnomuraAbstract:Abstract Oxidation of aliphatic cycloalkanols by Sodium Nitrite in trifluoroacetic acid gave α,ω-dicarboxylic acids in good yields. Adipic acid was obtained in a quantitative yield from cyclohexanol using 1 equiv of Sodium Nitrite under oxygen atmosphere but the oxidation required more than 3 equiv of Sodium Nitrite under nitrogen atmosphere. The oxidation method was applicable to the conversion of 1-alkanols to the corresponding carboxylic acids.