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Chemical Interpretation on the Multi-Stage Oxidation of Diethyl Ether

Journal of Thermal Science 2023年第2期32卷 513-520页

作者： SAKAI Yasuyuki NAKAMURA Hisashi SUGITA Toru tezuka takuya UYGUN Yasar Department of Mechanical Systems Engineering Ibaraki UniversityIbaraki 316-8511Japan Institute of Fluid Science Tohoku UniversityMiyagi 980-8577Japan Graduate School of Engineering Tohoku UniversityMiyagi 980-8579Japan Mathematics and Logistics Jacobs University BremenBremen 28759Germany

Multi-stage ignition and/or double NTC(negative temperature coefficient)behavior resulted from the low-temperature oxidation of ether compounds are still not clearly *** have investigated the oxidation mechanism of a stoichiometric DEE(diethyl ether)/air mixture by using a micro flow reactor with a controlled temperature profile to see the detail of low-temperature weak flame *** simulation was also performed to understand the chemical kinetics mechanism of observed weak flame *** measurement showed separated weak flame in the temperature range of 600 K-800 *** simulation also qualitatively reproduced this separated weak flame,and showed four peak of heat *** the reaction flow analysis,it was found that(1)O-O bond scission reaction of keto-hydroperoxide produced by DEE,(2)O-O bond scission reaction of CH3O2H,CH3CO3H,and C2H5O2H,(3)O-O bond scission reaction of H2O2,and(4)H+O2=O+OH are key chain branching reactions to explain the multi-stage oxidation.

关键词： diethyl ether micro flow reactor weak flame multi-stage oxidation reaction path

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Cyclic Bis(3'-5')diadenylic Acid (c-di-AMP) Analogs Promote the Activities of Photosynthesis and Respiration of <i>Chlamydomonas reinhardtii</i>

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American Journal of Plant Sciences 2014年第1期5卷 24-28页

作者： Takafumi tezuka Hiroshi Shirouzu Keigo Ishida Noritaka Suzuki takuya Matsuo Kin-ichi Oyama Setsuyuki Aoki Masaki Tsukamoto Center for Gene Research Division of Biological Science Graduate School of Science Nagoya University Nagoya Japan Chemical Instrumentation Facility Research Center for Materials Science Nagoya University Nagoya Japan Graduate School of Information Science Nagoya University Nagoya Japan

Physiological changes in the photosynthesis, respiration and cell division of Chlamydomonas reinhardtii, a freshwater green alga, in response to adenine nucleotides were investigated. In advance of this investigation, two adenine nucleotides, di(2'-O-methyl)-cyclic bis(3'-5')diadenylic acid (1) and its N-benzoyl-protected analog 2 were synthesized from the commercially available adenosine phosphoramidite. The respective analogs significantly promoted the cell division (cell number) of C. reinhardtii strains 137c mt+ and BR mt+. Moreover, they significantly enhanced the O2 evolution (photosynthesis) and O2 uptake (respiration) of both strains. c-di-AMP analogs seem to play an effective role as a physiological activator in planta.

关键词： c-di-AMP O2 Evolution (Photosynthesis) O2 Uptake (Respiration) Chlamydomonas reinhardtii

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