The Experts below are selected from a list of 162 Experts worldwide ranked by ideXlab platform
Attila Dagdeviren - One of the best experts on this subject based on the ideXlab platform.
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Investigation of the ultrastructurel of different cells in lymph nodules by using Zinc Iodide osmium tetroxide technique.
Okajimas folia anatomica Japonica, 1998Co-Authors: Engin Deveci, Attila Dagdeviren, Kemal Güven, Serap S. InalözAbstract:The Zinc Iodide -osmium tetroxide (ZIO) fixation/staining method was applied for neurocytological study and also to examine several other tissue samples including human blood and bone marrow on nerve endings in the median eminence, epidermal langerhans cells of lymphoid tissue. Although precise specificity can not be attributed to the staining reaction. Interesting staining patterns for different cell types in lymph node were observed by one of the ZIO staining solutions. The significance of ZIO positivity is briefly discussed.
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Light and Electron Microscopic Examination of Exocrine Pancreas Using Zinc Iodide-Osmium Tetroxide Technique
Okajimas folia anatomica Japonica, 1998Co-Authors: Pergin Atilla, Murat Akkus, Engin Deveci, Yilmaz Bilgin, Serap S. Inalöz, Attila DagdevirenAbstract:Zinc Iodide-osmium tetroxide (ZIO) fixation/staining technique is a metallophilic technique which has been used for the examination of various tissues and cell types. We examined the ZIO (+) cell types in rat exocrine pancreas to obtain further evidence for the significance of the reaction. Among mostly non-reactive pancreatic acinar cells there were ZIO (+) acinar cells of varying staining intensity. Zymogenic granules and centroacinar cells were completely non-reactive. Our electron microscopic findings support the view that the reactivity of the technique used is cell specific but not cell type or organelle specific.
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New applications for the Zinc Iodide-osmium tetroxide technique.
Journal of Anatomy, 1994Co-Authors: Attila Dagdeviren, H Alp, Ülken ÖrsAbstract:The Zinc Iodide-osmium tetroxide (ZIO) fixation/staining method was applied for neurocytological studies and also to examine several other tissue samples including epidermal Langerhans cells, blood and bone marrow cells and lymphoid tissue. Although precise specificity cannot be attributed to the staining reaction, interesting staining patterns for different cell types were observed by using one of the ZIO staining solutions. The significance of ZIO positivity is briefly discussed.
Ülken Örs - One of the best experts on this subject based on the ideXlab platform.
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New applications for the Zinc Iodide-osmium tetroxide technique.
Journal of Anatomy, 1994Co-Authors: Attila Dagdeviren, H Alp, Ülken ÖrsAbstract:The Zinc Iodide-osmium tetroxide (ZIO) fixation/staining method was applied for neurocytological studies and also to examine several other tissue samples including epidermal Langerhans cells, blood and bone marrow cells and lymphoid tissue. Although precise specificity cannot be attributed to the staining reaction, interesting staining patterns for different cell types were observed by using one of the ZIO staining solutions. The significance of ZIO positivity is briefly discussed.
Akira Tai - One of the best experts on this subject based on the ideXlab platform.
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A Stereochemical Study of the Isomerization of Cyclopropyl Ethers to Allyl Ethers Catalyzed with Zinc Iodide
The Journal of organic chemistry, 1996Co-Authors: Takashi Sugimura, Noboru Sonoda, Tohru Futagawa, Atsushi Mori, Ilhyong Ryu, Akira TaiAbstract:Optically active 1-alkoxybicyclo[4.1.0]heptane was converted using Zinc Iodide as a catalyst to 2-alkoxymethylidenecyclohexane without loss of optical purity. The mechanism of the isomerization was studied using a stereochemical analysis of the product and deuterium labeling experiments. The results indicated that the isomerization takes place through a stepwise mechanism that involves an attack of Zinc Iodide on the cyclopropane ring to cause ring opening, followed by an intramolecular 1,2-hydride shift with liberation of the Zinc Iodide.
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Mechanism of isomerization of cyclopropyl ethers with Zinc Iodide. New synthetic route to optically active allyl alcohols
Journal of the Chemical Society Chemical Communications, 1992Co-Authors: Takashi Sugimura, Tohru Futagawa, Ilhyong Ryu, Akira TaiAbstract:Isomerization of cyclopropyl ethers to allyl ethers in the presence of Zinc Iodide is confirmed to proceed by a 1,2-hydride shift mechanism by stereochemical and deuterium labelling experiments.
John E. Bercaw - One of the best experts on this subject based on the ideXlab platform.
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enhanced selectivity in the conversion of methanol to 2 2 3 trimethylbutane triptane over Zinc Iodide by added phosphorous or hypophosphorous acid
Chemical Communications, 2007Co-Authors: John E. Bercaw, Robert H. Grubbs, Nilay Hazari, Jay A. LabingerAbstract:The yield of triptane from the reaction of methanol with Zinc Iodide is dramatically increased by addition of phosphorous or hypophosphorous acid, via transfer of hydride from a P–H bond to carbocationic intermediates.
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On the Mechanism of the Conversion of Methanol to 2,2,3-Trimethylbutane (Triptane) over Zinc Iodide
The Journal of organic chemistry, 2006Co-Authors: John E. Bercaw, Paula L. Diaconescu, Robert H. Grubbs, Kay Richard Daniel, Sarah Kitching, Jay A. Labinger, Parisa Mehrkhodavandi, George E. Morris, Glenn J. SunleyAbstract:Methanol is converted to a mixture of hydrocarbons by reaction with Zinc Iodide at 200 °C with one highly branched alkane, 2,2,3-trimethylbutane (triptane), being obtained in surprisingly high selectivity. Mechanistic studies implicate a two-stage process, the first involving heterogeneously catalyzed formation of a carbon−carbon-bonded species, probably ethylene, that undergoes homogeneously catalyzed sequential cationic methylation to higher hydrocarbons. The first stage can be bypassed by addition of olefins, higher alcohols, or arenes, which act as initiators. Rationales for the particular activity of Zinc Iodide and for the selectivity to triptane are proposed.
Jay A. Labinger - One of the best experts on this subject based on the ideXlab platform.
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enhanced selectivity in the conversion of methanol to 2 2 3 trimethylbutane triptane over Zinc Iodide by added phosphorous or hypophosphorous acid
Chemical Communications, 2007Co-Authors: John E. Bercaw, Robert H. Grubbs, Nilay Hazari, Jay A. LabingerAbstract:The yield of triptane from the reaction of methanol with Zinc Iodide is dramatically increased by addition of phosphorous or hypophosphorous acid, via transfer of hydride from a P–H bond to carbocationic intermediates.
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On the Mechanism of the Conversion of Methanol to 2,2,3-Trimethylbutane (Triptane) over Zinc Iodide
The Journal of organic chemistry, 2006Co-Authors: John E. Bercaw, Paula L. Diaconescu, Robert H. Grubbs, Kay Richard Daniel, Sarah Kitching, Jay A. Labinger, Parisa Mehrkhodavandi, George E. Morris, Glenn J. SunleyAbstract:Methanol is converted to a mixture of hydrocarbons by reaction with Zinc Iodide at 200 °C with one highly branched alkane, 2,2,3-trimethylbutane (triptane), being obtained in surprisingly high selectivity. Mechanistic studies implicate a two-stage process, the first involving heterogeneously catalyzed formation of a carbon−carbon-bonded species, probably ethylene, that undergoes homogeneously catalyzed sequential cationic methylation to higher hydrocarbons. The first stage can be bypassed by addition of olefins, higher alcohols, or arenes, which act as initiators. Rationales for the particular activity of Zinc Iodide and for the selectivity to triptane are proposed.
