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Technologies for electron beam direct writing

Kato, T. ; Watakabe, Y. ; Saitoh, K. ; [et al.]

Amsterdam : Elsevier

Microelectronic Engineering 1 (1983), S. 69-90

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ISSN: 0167-9317

Keywords: CAD-EBES network ; EB direct writing ; EB technology

Source: Elsevier Journal Backfiles on ScienceDirect 1907 - 2002

Topics: Electrical Engineering, Measurement and Control Technology

Type of Medium: Electronic Resource

URL: http://linkinghub.elsevier.com/retrieve/pii/0167-9317(83)90013-8

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Non-aqueous, reversed-phase, high-performance, thin-layer chromatography and column liquid chromatography of metal complexes of porphine (1986)

Wakui, Y. ; Saitoh, K. ; Suzuki, N.

Springer

Chromatographia 22 (1986), S. 160-164

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ISSN: 1612-1112

Keywords: Thin layer chromatography ; Column liquid chromatography ; 21H, 23H-Porphine ; Metalloporphyrin complexes

Source: Springer Online Journal Archives 1860-2000

Topics: Chemistry and Pharmacology

Notes: Summary The chromatographic mobility of 21H, 23H-porphine and its Ni(II), Cu(II), Zn(II) and Pd(II) complexes were investigated by high-performance thin-layer chromatography on an octadecyl-bonded, silica gel plate with various polar organic solvents including alcohols, acetonitrile, dimethylsulfoxide and propylenecarbonate. The mobility generally decreases according to the central metal ion of the complex as follows: Zn(II)〉(free porphine)〉Ni(II)〉Pd(II)〉Cu(II). Methanol is a good choice of solvent for the separation of these metal porphine complexes. Successful separation of porphine and the four metal complexes is accomplished within 13 min on a LiChrosorb RP-18 column with methanol eluent.

Type of Medium: Electronic Resource

URL: http://dx.doi.org/10.1007/BF02257319

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High-performance thin-layer chromatography of etioporphyrin and its vanadium (IV), nickel (II) and coper (II) complexes (1985)

Miyake, S. ; Saitoh, K. ; Suzuki, N.

Springer

Chromatographia 20 (1985), S. 417-420

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ISSN: 1612-1112

Keywords: High-Performance TLC ; Metal complexes ; Etioporphyrin

Source: Springer Online Journal Archives 1860-2000

Topics: Chemistry and Pharmacology

Notes: Summary The RF values were obtained for etioporphyrin I (H2Etio) and its vanadyl, nickel and copper complexes on cellulose, silica gel, and octyl-bonded silica HPTLC plates, with various organic solvents. The mobility of these compounds tends to increase in the following order: (1) on cellulose, VOEtio 〈 H2Etio 〈 CuEtio ≤ NiEtio; (2) on silica gel, H2Etio 〈 VOEtio 〈 NiEtio ≤ CuEtio; (3) on octyl-bonded silica, CuEtio 〈 NiEtio 〈 VOEtio and the apparent mobility of H2Etio relative to metal-Etio complexes depends on the developing solvent used. Complete separation of these four Etio compounds can be accomplished on an octyl-bonded silica plate with either methanol or acetone.

Type of Medium: Electronic Resource

URL: http://dx.doi.org/10.1007/BF02265483

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