Zobrazeno 1 - 10
of 30
pro vyhledávání: '"Masami Okamura"'
Autor:
Masami Okamura, Takayuki Ohyoshi, Shota Funakubo, Yuto Onozaki, Hideo Kigoshi, Kazuaki Suzuki, Ichiro Hayakawa, Dai Kawamura
Publikováno v:
Organic Letters. 19:5713-5716
The total synthesis of biselide E, a marine polyketide isolated from the Okinawan ascidian, has been accomplished. The highlight of this approach is the use of the β-elimination reaction of the chloroacetoxy group for the construction of an unstable
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::01f853be4789c184bf2fda6be9c9c51b
https://doi.org/10.1021/acs.orglett.7b03009
https://doi.org/10.1021/acs.orglett.7b03009
Autor:
Mami Shimanuki, Kazuaki Suzuki, Hideo Kigoshi, Ichiro Hayakawa, Takuya Yamada, Masami Okamura, Kizuku Kimura, Takayuki Ohyoshi
Publikováno v:
Synthesis. 49:2958-2970
The total synthesis of biselide A based on our earlier strategy of synthesizing haterumalides is reported. The highlights of this approach are the use of regioselective enzymatic hydrolysis for the installation of a C20 oxygen functional group and an
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::cb1355fffd94722ea947c075678efd78
https://doi.org/10.1055/s-0036-1588169
https://doi.org/10.1055/s-0036-1588169
Autor:
Tetsuji Okamura, Toru Kuriyama, Y. Ohtani, Massimo Fabbri, Luca Trevisani, Francesco Negrini, Masami Okamura
Publikováno v:
Cryogenics. 42:653-657
A newly developed magnetic regenerator material Er(Ni 0.075 Co 0.925 ) 2 , having high specific heat at temperatures from 10 to 20 K, has been tested inside the second regenerator of a two-stage GM cryocooler. Different working conditions have been e
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::b9445b1da4626ba71890b316aa2a7b57
https://doi.org/10.1016/s0011-2275(02)00101-7
https://doi.org/10.1016/s0011-2275(02)00101-7
Autor:
Y. Miyata, Masami Okamura, H. Nakagome, T. Numazawa, Takasu Hashimoto, S. Fujii, Hiroshi Nakane
Publikováno v:
Journal of the Magnetics Society of Japan. 23:1157-1160
In order to obtain high regenerative effectiveness, the heat capacity of the regenerator materials must be larger than that of helium, which is used as the working gas. For a magnetic regenerator material to be effective in the low temperature range,
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::94f1122d3cafc71ac8ea9d87061dded9
https://doi.org/10.3379/jmsjmag.23.1157
https://doi.org/10.3379/jmsjmag.23.1157
Autor:
Naoyuki Sori, Masami Okamura
Publikováno v:
TEION KOGAKU (Journal of Cryogenics and Superconductivity Society of Japan). 31:150-155
Various magnetic regenerator materials, such as Er3Ni, Er3Co, ErNi and ErNi2, are fabricated in the form of a spherical particle by centrifugal atomization. 4K level refrigeration has been achieved by a GM refrigerator using these materials. However,
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::e8ac0485f7b8c9fc7862565c73e23b55
https://doi.org/10.2221/jcsj.31.150
https://doi.org/10.2221/jcsj.31.150
Autor:
Ichiro Hayakawa, Kazuaki Suzuki, Masami Okamura, Shota Funakubo, Yuto Onozaki, Dai Kawamura, Takayuki Ohyoshi, Hideo Kigoshi
Publikováno v:
Organic Letters; 10/20/2017, Vol. 19 Issue 20, p5713-5716, 4p
Autor:
Ichiro Hayakawa, Masami Okamura, Kazuaki Suzuki, Mami Shimanuki, Kizuku Kimura, Takuya Yamada, Takayuki Ohyoshi, Hideo Kigoshi
Publikováno v:
Synthesis; 2017, Vol. 49 Issue 13, p2958-2970, 13p
Autor:
Hiroyuki Fujishiro, T. Yamaguchi, Sadao Yamazaki, S. Yoshizawa, H. Nakane, T. Numazawa, Masami Okamura
Publikováno v:
Cryocoolers 11 ISBN: 9780306465673
Materials including rare-earth and Sb compounds were developed as regenerator materials for a 4K GM refrigerator. Sb compounds have a remarkably large peak value of specific heat in the low temperature range. First, the heat capacities, thermal condu
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::bf0f9522333448ed128942b81ad1c07d
https://doi.org/10.1007/0-306-47112-4_56
https://doi.org/10.1007/0-306-47112-4_56
Publikováno v:
Cryocoolers 10 ISBN: 9780306461200
In order to obtain high regenerative effectiveness, the heat capacity of the regenerator materials must be larger than that of helium as the working gas. For a magnetic regenerator material to be effective in the low temperature range, its transition
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::a12df3effc941badd8f4d63c6b44c088
https://doi.org/10.1007/0-306-47090-x_73
https://doi.org/10.1007/0-306-47090-x_73
Publikováno v:
Advances in Cryogenic Engineering Materials ISBN: 9781461369264
The heat capacities of rare-earth intermetallic compounds RAlxGa2-x (R=Nd,Ho,Er,Dy; 0≤x≤2) and rare-earth garnets Gd3Ga5012, Dy3Al5012 were investigated for regenerator use below 4 K region. The ErAl0.5Ga1.5 sample had a comparable heat capacity
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::e5ee76d80b4282472660ce7adb929dca
https://doi.org/10.1007/978-1-4615-4293-3_54
https://doi.org/10.1007/978-1-4615-4293-3_54