Zobrazeno 1 - 10
of 66
pro vyhledávání: '"Shigeo Umetani"'
Mutual Extraction Separation of Al, Ga, In and Zn with Trifluoroacetylcycloalkanones and β-Diketones
Publikováno v:
Bunseki kagaku. 66:817-824
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::485aa3e0c87ef3138f2f0aa149409313
https://doi.org/10.2116/bunsekikagaku.66.817
https://doi.org/10.2116/bunsekikagaku.66.817
Publikováno v:
Solvent Extraction Research and Development, Japan. 19:177-181
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::0ec378d5806a804cfb3b576601ba48df
https://doi.org/10.15261/serdj.19.177
https://doi.org/10.15261/serdj.19.177
Publikováno v:
Journal of Molecular Liquids. 145:24-32
In propylene carbonate (PC), the higher ion-aggregation behavior of lithium fluoroalkanoates (the total number of carbons: 2 to 8) was investigated by means of conductometry at 25 °C. At lower salt concentrations, the molar conductivities ( Λ calcd
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::f4e37ae38a05153b5d8457b2acd8ea3b
https://doi.org/10.1016/j.molliq.2008.11.009
https://doi.org/10.1016/j.molliq.2008.11.009
Autor:
M. Lutfi Firdaus, Shouhei Urushihara, Shigeo Umetani, Yusuke Nakagawa, Kazuhiro Norisuye, Yoshiki Sohrin, Taishi Sato
Publikováno v:
Analytica Chimica Acta. 583:296-302
Here, we present the first simultaneous preconcentration and determination of ultratrace (pmol kg−1 level) Zr, Hf, Nb, Ta and W in seawater, both in the form of dissolved and acid-dissolvable species. 8-Hydroxyquinoline (8HQ) bonded covalently to a
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::7b3420a9990744af4154fdd5dd55c4cc
https://doi.org/10.1016/j.aca.2006.10.033
https://doi.org/10.1016/j.aca.2006.10.033
Publikováno v:
BUNSEKI KAGAKU. 56:47-50
The lanthanoids in shell of shellfish were determined by ICP-MS. The intensities of lanthanoids were very highly suppressed by large amounts of calcium ions, which made their determination difficult. It was necessary to separate any lantanoids from c
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::3dc1d91f04c951075a7536959eb0b2ec
https://doi.org/10.2116/bunsekikagaku.56.47
https://doi.org/10.2116/bunsekikagaku.56.47
Publikováno v:
Deep Sea Research Part II: Topical Studies in Oceanography. 54:14-37
Here we present the first vertical distribution of dissolved (D) and acid-dissolvable (AD) bioactive trace metals (Fe, Co, Ni, Cu, Zn and Cd) in the Sulu Sea and the South China Sea, together with those observed previously by the same method in the w
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::31c135a4def19f8e958cd5ab9a784c20
https://doi.org/10.1016/j.dsr2.2006.04.019
https://doi.org/10.1016/j.dsr2.2006.04.019
Autor:
Shigeo Umetani
Publikováno v:
Journal of Alloys and Compounds. :981-984
Some s-diketones in which the distance between the two donating oxygens was controlled have been designed and synthesized. The structures of the s-diketones derivatives were evaluated by semi-empirical MNDO/H molecular orbital calculation and 1H NMR.
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::9f85bdb53af13bca62cc0cdfd3a25373
https://doi.org/10.1016/j.jallcom.2004.12.089
https://doi.org/10.1016/j.jallcom.2004.12.089
Autor:
Shigeo Umetani
Publikováno v:
Journal of Society of Materials Engineering for Resources of Japan. 17:1-7
Improved extraction-separation could be achieved in the extraction of alkali, alkaline earth and rare earth metal ions using macrocyclic ligands as ion size selective masking reagents. By adding macrocyclic ligand to the aqueous phase in the conventi
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::4dfea234ce5b449aa459ffc28ddd34bb
https://doi.org/10.5188/jsmerj.17.1
https://doi.org/10.5188/jsmerj.17.1
Publikováno v:
BUNSEKI KAGAKU. 53:1329-1334
The magnesium in hard tissues (shell and pearl) of shellfish inhabiting freshwater and sea water was determined by inductively coupled plasma-atomic emission spectrometry (ICP-AES) after solvent extraction separation. We examined whether ICP-AES sign
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::0a6d50aebbef1d13c67e36e2894f645b
https://doi.org/10.2116/bunsekikagaku.53.1329
https://doi.org/10.2116/bunsekikagaku.53.1329
Publikováno v:
Solvent Extraction and Ion Exchange. 21:73-90
The substituent effect of ortho‐substituted 4‐aroyl derivatives of 1‐phenyl‐3‐methylpyrazol‐5‐one (HA) on the adduct formation reaction between their scandium or lanthanum (M) chelates and a neutral ligand, tri‐n‐octylphosphine oxid
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::528f9fe2b8deaf59387d07f3d75e3b49
https://doi.org/10.1081/sei-120017548
https://doi.org/10.1081/sei-120017548