Zobrazeno 1 - 10
of 308
pro vyhledávání: '"Keisuke OHTO"'
Autor:
Keisuke Ohto
Publikováno v:
Separations, Vol 9, Iss 10, p 299 (2022)
The reservation of metallic resources has been an urgent global issue with increased demand in an advanced industry [...]
Externí odkaz:
https://doaj.org/article/8162c9fcefcc46a2849a59806d52097f
Autor:
Yehezkiel Steven Kurniawan, Mizuki Ryu, Ramachandra Rao Sathuluri, Wataru Iwasaki, Shintaro Morisada, Hidetaka Kawakita, Keisuke Ohto, Masatoshi Maeki, Masaya Miyazaki, Jumina Jumina
Publikováno v:
Indonesian Journal of Chemistry, Vol 19, Iss 2, Pp 368-375 (2019)
In this study, the microreactor system was investigated and compared with the batch-wise system as rapid and effective extractive Pb(II) separation over Fe(III), Cu(II) and Zn(II) with tetraacetic acid calix[4]arene. By using a microreactor system, t
Externí odkaz:
https://doaj.org/article/01c62da891634f34b1c58b36576a0c76
Publikováno v:
Separations, Vol 9, Iss 5, p 120 (2022)
Microalgae are now known as potential microorganisms in the production of chemicals, fuel, and food. Since microalgae live in the sea and the river, they need to be harvested and separated and cultured for further usage. In this study, to separate mi
Externí odkaz:
https://doaj.org/article/9739c17a6293414489548924e067a039
Autor:
Keisuke Ohto, Nako Fuchiwaki, Hiroaki Furugou, Shintaro Morisada, Hidetaka Kawakita, Marco Wenzel, Jan J. Weigand
Publikováno v:
Separations, Vol 8, Iss 11, p 211 (2021)
We prepared acetic acid derivatives using three different frameworks, calix[4]arene, alkenyltrimethylol, and trihydroxytriphenylmethane, which differ in the number and size of their coordination sites. We further investigated the extraction propertie
Externí odkaz:
https://doaj.org/article/d07f6bc8b30840068eb8c22a7e96cf5d
Publikováno v:
Separations, Vol 8, Iss 9, p 139 (2021)
The recycling of rare metals such as platinum (Pt) from secondary resources, such as waste electronic and electrical equipment and automotive catalysts, is an urgent global issue. In this study, simple secondary amides and urea, N-(2-ethylhexyl)aceta
Externí odkaz:
https://doaj.org/article/cafd9532ed114c3db8089cb3ef956f28
Autor:
Keisuke Ohto, Hiromasa Murashima, Hiroshi Murakami, Shintaro Morisada, Hidetaka Kawakita, Marco Wenzel, Jan J. Weigand, Karsten Gloe
Publikováno v:
Indonesian Journal of Chemistry, Vol 17, Iss 3, Pp 491-499 (2017)
Tripodal extraction reagent with three phosphoric acid groups, together with the corresponding monopodal molecule has been prepared to investigate some metals extraction behavior, in particular, trivalent rare earth elements (REEs). The tripodal reag
Externí odkaz:
https://doaj.org/article/fbe25efd410d4ae79714f7a2444f40fa
Autor:
Yehezkiel Steven Kurniawan, Ramachandra Rao Sathuluri, Keisuke Ohto, Wataru Iwasaki, Hidetaka Kawakita, Shintaro Morisada, Masaya Miyazaki, Jumina Jumina
Publikováno v:
Separations, Vol 8, Iss 5, p 70 (2021)
Lithium extraction remains a challenge in the hydrometallurgy process due to its economic value and maldistribution sources. Employing calix[4]arene derivatives in solvent extraction techniques results in high selectivity and extraction capability, b
Externí odkaz:
https://doaj.org/article/eaf43f52bc0c483fb57c0c253e5c1d61
Autor:
Edi Suharyadi, Sri Handika Pratiwi, I Putu Tedy Indrayana, Takeshi Kato, Satoshi Iwata, Keisuke Ohto
Publikováno v:
Materials Research Express, Vol 8, Iss 3, p 036101 (2021)
Zn-Ni ferrite nanoparticles were successfully synthesized by coprecipitation method. The samples were annealed at various temperatures, i.e., 200 °C, 400 °C, 600 °C, 800 °C, and 1000 °C. The nanoparticles have the mixed spinel phase structure as
Externí odkaz:
https://doaj.org/article/47a34d328208424db1e26f021a107df6
Publikováno v:
Membranes, Vol 11, Iss 2, p 71 (2021)
After filtration, filtered residue is recovered by a spoon, during which, the structure of the residue is destroyed, and the activity of the microorganism would be reduced. Thus, a more efficient recovery method of filtered residue is required. This
Externí odkaz:
https://doaj.org/article/bc9eb912abe4456a8ed05a8c470d0cf6
Autor:
Takanori Hidane, Hidemi Kitani, Shintaro Morisada, Keisuke Ohto, Hidetaka Kawakita, Sachiko Furuta
Publikováno v:
Membranes, Vol 11, Iss 1, p 22 (2020)
A 120-nm silica suspension was permeated through a porous polyethylene (PE) hollow-fiber membrane, as was a solution of deformable elastic particles of poly(N-isopropylacrylamide) (PNIPAM) gel and dextran. The amount adsorbed and flux of permeation w
Externí odkaz:
https://doaj.org/article/4785e103ff5947458dcdbf63076d2b6d