The Experts below are selected from a list of 65253 Experts worldwide ranked by ideXlab platform
Shoji Hara - One of the best experts on this subject based on the ideXlab platform.
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selective introduction of a fluorine atom into carbohydrates and a nucleoside by ring opening fluorination reaction of epoxides
Journal of Fluorine Chemistry, 2006Co-Authors: Yuriko Akiyama, Chiharu Hiramatsu, Tsuyoshi Fukuhara, Shoji HaraAbstract:Abstract Ring-opening fluorination reactions of epoxides using tetrabutylammonium bifluoride (TBABF)-KHF 2 , or Et 3 N-3HF under microwave irradiation were applied for the introduction of a fluorine atom into the carbohydrate molecules. When TBABF-KHF 2 was used as the fluorination reagent, a fluorine atom was introduced regioselectively and various functional groups can tolerate the conditions. When Et 3 N-3HF was used under microwave irradiation, the reaction time could be remarkably shortened compared with the Conventional Oil-bath heating.
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selective introduction of a fluorine atom into carbohydrates and a nucleoside by ring opening fluorination reaction of epoxides
Journal of Fluorine Chemistry, 2006Co-Authors: Yuriko Akiyama, Chiharu Hiramatsu, Tsuyoshi Fukuhara, Shoji HaraAbstract:Abstract Ring-opening fluorination reactions of epoxides using tetrabutylammonium bifluoride (TBABF)-KHF 2 , or Et 3 N-3HF under microwave irradiation were applied for the introduction of a fluorine atom into the carbohydrate molecules. When TBABF-KHF 2 was used as the fluorination reagent, a fluorine atom was introduced regioselectively and various functional groups can tolerate the conditions. When Et 3 N-3HF was used under microwave irradiation, the reaction time could be remarkably shortened compared with the Conventional Oil-bath heating.
Nicola Koper - One of the best experts on this subject based on the ideXlab platform.
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Conventional Oil and natural gas infrastructure increases brown headed cowbird molothrus ater relative abundance and parasitism in mixed grass prairie
Royal Society Open Science, 2017Co-Authors: Jacy Bernathplaisted, Heather R Nenninger, Nicola KoperAbstract:The rapid expansion of Oil and natural gas development across the Northern Great Plains has contributed to habitat fragmentation, which may facilitate brood parasitism of ground-nesting grassland songbird nests by brown-headed cowbirds ( Molothrus ater ), an obligate brood parasite, through the introduction of perches and anthropogenic edges. We tested this hypothesis by measuring brown-headed cowbird relative abundance and brood parasitism rates of Savannah sparrow ( Passerculus sandwichensis ) nests in relation to the presence of infrastructure features and proximity to potential perches and edge habitat. The presence of Oil and natural gas infrastructure increased brown-headed cowbird relative abundance by a magnitude of four times, which resulted in four times greater brood parasitism rates at infrastructure sites. While the presence of infrastructure and the proximity to roads were influential in predicting brood parasitism rates, the proximity of perch sites was not. This suggests that brood parasitism associated with Oil and natural gas infrastructure may result in additional pressures that reduce productivity of this declining grassland songbird.
Nader Karimi - One of the best experts on this subject based on the ideXlab platform.
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natural convection of cuo water nanofluid in a Conventional Oil water separator cavity application to combined cycle power plants
Journal of The Taiwan Institute of Chemical Engineers, 2021Co-Authors: Mohamad Sadegh Sadeghi, A S Dogonchi, Maryam Ghodrat, Ali J Chamkha, Hesham Alhumade, Nader KarimiAbstract:Abstract The Oily water from various sources in combined cycle power plants is collected in Oil/water separator in which the Oil separates from water due to the density difference. The idea of the presented geometry is taken from Conventional Oil/water separators. This paper studies the natural convection of the CuO-water nanoliquid in a rectangular cavity with fins attached to the insulated wall and porous media. Discretion of Navier-Stokes equations is done by Finite Element Method and assumptions are laminar, steady and incompressible flow. Heat transfer performance and entropy generation are investigated for distinct Rayleigh numbers (103–105), Darcy numbers (10−2–10−4), and Hartmann numbers (0, 10, 20). Different sizes of the fins are also studied to show consequences of fin size on heat transfer in cavity. This is the first time that these parameters and their impacts on Nusselt number and entropy generation are studied for a Conventional Oil/water separator cavity. Corollaries demonstrate that increasing Rayleigh number and Darcy number improves heat transfer performance and average Nusselt number. Nevertheless, Hartmann number has a reverse effect with average Nusselt number. Finally, a new equation for average Nusselt number is developed with regard to Rayleigh number, Hartmann number, and Darcy number.
Yuriko Akiyama - One of the best experts on this subject based on the ideXlab platform.
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selective introduction of a fluorine atom into carbohydrates and a nucleoside by ring opening fluorination reaction of epoxides
Journal of Fluorine Chemistry, 2006Co-Authors: Yuriko Akiyama, Chiharu Hiramatsu, Tsuyoshi Fukuhara, Shoji HaraAbstract:Abstract Ring-opening fluorination reactions of epoxides using tetrabutylammonium bifluoride (TBABF)-KHF 2 , or Et 3 N-3HF under microwave irradiation were applied for the introduction of a fluorine atom into the carbohydrate molecules. When TBABF-KHF 2 was used as the fluorination reagent, a fluorine atom was introduced regioselectively and various functional groups can tolerate the conditions. When Et 3 N-3HF was used under microwave irradiation, the reaction time could be remarkably shortened compared with the Conventional Oil-bath heating.
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selective introduction of a fluorine atom into carbohydrates and a nucleoside by ring opening fluorination reaction of epoxides
Journal of Fluorine Chemistry, 2006Co-Authors: Yuriko Akiyama, Chiharu Hiramatsu, Tsuyoshi Fukuhara, Shoji HaraAbstract:Abstract Ring-opening fluorination reactions of epoxides using tetrabutylammonium bifluoride (TBABF)-KHF 2 , or Et 3 N-3HF under microwave irradiation were applied for the introduction of a fluorine atom into the carbohydrate molecules. When TBABF-KHF 2 was used as the fluorination reagent, a fluorine atom was introduced regioselectively and various functional groups can tolerate the conditions. When Et 3 N-3HF was used under microwave irradiation, the reaction time could be remarkably shortened compared with the Conventional Oil-bath heating.
Jacy Bernathplaisted - One of the best experts on this subject based on the ideXlab platform.
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Conventional Oil and natural gas infrastructure increases brown headed cowbird molothrus ater relative abundance and parasitism in mixed grass prairie
Royal Society Open Science, 2017Co-Authors: Jacy Bernathplaisted, Heather R Nenninger, Nicola KoperAbstract:The rapid expansion of Oil and natural gas development across the Northern Great Plains has contributed to habitat fragmentation, which may facilitate brood parasitism of ground-nesting grassland songbird nests by brown-headed cowbirds ( Molothrus ater ), an obligate brood parasite, through the introduction of perches and anthropogenic edges. We tested this hypothesis by measuring brown-headed cowbird relative abundance and brood parasitism rates of Savannah sparrow ( Passerculus sandwichensis ) nests in relation to the presence of infrastructure features and proximity to potential perches and edge habitat. The presence of Oil and natural gas infrastructure increased brown-headed cowbird relative abundance by a magnitude of four times, which resulted in four times greater brood parasitism rates at infrastructure sites. While the presence of infrastructure and the proximity to roads were influential in predicting brood parasitism rates, the proximity of perch sites was not. This suggests that brood parasitism associated with Oil and natural gas infrastructure may result in additional pressures that reduce productivity of this declining grassland songbird.