Browsing Kjemisk institutt by Issue Date
Now showing items 21-40 of 1543
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(Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 1992)© 1992 Acta Chemica Scandinavica
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(Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 1992)The nuclear and magnetic structures of YBa 2 Fe 3 O 8 have been investigated by powder neutron diffraction at room temperature. The nuclear structure of the compound has the symmetry of space group P4/mmm and lattice ...
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(Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 1992)© 1992 Acta Chemica Scandinavica
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(Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 1992)
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(Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 1992)A convenient of synthesizing pure threo-1-oxiranylethanol is described. Its microwave spectrum has been investigated at the 6-31G* level. The NMR spectrum has been studied extensively for comparison of the conformations ...
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(Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 1993)© 1993 Acta Chemica Scandinavica
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(Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 1994)The nuclear and magnetic structures of ( Y 1 − x Ca x ) Ba 2 Fe 3 O 8 + δ with x=0.05, 0.10, and 0.20 have been investigated by neutron-powder diffraction at room temperature. The compound crystallizes with the symmetry ...
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(Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 1994)© 1994 Acta Chemica Scandinavica
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(Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 1994)The results of polarized micro-Raman scattering experiments on YBa 2 Fe 3 O 8 + δ with δ=0.1 are reported. We identified seven out of the total ten by symmetry Raman-allowed phonons at 134 cm − 1 ( A 1 g ), 148 cm − 1 ...
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(Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 1996)
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(Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 1998)
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(Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 1998)
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(Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 1999)A mixed-valence state, formally denoted as Fe 2 . 5 + , is observed in the 300 K Mössbauer spectra of the most reduced samples of SmBaFe 2 O 5 + w . Upon cooling below the Verwey-type transition temperature (TV≈ 200 K ) ...
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(Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 2000)The oxygen-deficient double perovskite YBaCo 2 O 5 , containing corner-linked CoO 5 square pyramids as principal building units, undergoes a paramagnetic to antiferromagnetic spin ordering at 330 K. This is accompanied ...
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(Master thesis / Hovedoppgave, 2001)I dette arbeidet ble det studert hvilken innvirkning 2-fluoretanol, 2,2-difluoretanol og 2,2,2-trifluoretanol har på miljøet og klimaet. Disse forbindelsene er foreslått som nye erstatningsstoffer for klorfluorkarboner ...
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(Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 2001)Electronic, magnetic, and structural phase transitions in nearly stoichiometric TbBaFe 2 O 5 + w ( 0.00 < w < 0.05 ) have been investigated. At high temperatures this compound is a paramagnetic, mixed-valence (Fe 2 . 5 + ...
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(Master thesis / Hovedoppgave, 2003)A review on the use of packed capillary columns in gas chromatography (GC) is presented. Several articles on the invention of packed capillary columns have been published, as well as on the progress and the development of ...
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(Master thesis / Hovedoppgave, 2003)Målet for denne oppgaven er å beskrive de fysiokjemiske egenskapene til fem forsøksfelt i Norden. Oppgaven er en del av et større internasjonalt prosjekt som omhandler naturlig organisk materiale (NOM) i Norden ...
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(Master thesis / Hovedoppgave, 2003)Oppgaven er en grunnleggende undersøkelse av sol-gel overganger i vandige dispersjoner av Microsilica. Den er delt i tre deler: 1) undersøkelse av Microsilica kolloid- og overflateegenskaper 2) identifisering av parametere ...
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(Master thesis / Hovedoppgave, 2003)A packed capillary column switching system has been developed, suitable for solute focusing of large sample volumes on a short precolumn prior to temperature-programmed elution on an analytical column. The peptides angiotensin ...