Moving Magnetic Features around a Pore

Spectropolarimetric observations from Sunrise II/IMaX obtained in June 2013 are used for a statistical analysis to determine the physical properties of moving magnetic features (MMFs) observed near a pore. MMFs of the same and opposite polarity with respect to the pore are found to stream from its border at an average speed of 1.3 km s$^{-1}$ and 1.2 km s$^{-1}$ respectively, with mainly same-polarity MMFs found further away from the pore. MMFs of both polarities are found to harbor rather weak, inclined magnetic fields. Opposite-polarity MMFs are blue-shifted, while same-polarity MMFs do not show any preference for up- or downflows. Most of the MMFs are found to be of sub-arcsecond size and carry a mean flux of $\sim$ 1.2$\times 10^{17}$ Mx.Comment: 8 pages, 4 figures, accepted for publication in ApJ

Some reactions of acetylenic alcohols

The lithium aluminium hydride (deuteride) reduction of 2,2-di-(methoxymethyl)-3-phenylhex-4-yn-3-ol (98), in a range of ether solvents has been examined. Intramolecular solvation of the aluminium atom during the reduction process has been identified and the mode of formation of the reaction products discussed. Isolation and identification of the unexpected cyclopropane derivatives (115) and (116) resulted in extending studies to encompass the reaction of 1-methoxy- 2,2-dimethyl-3-phenylhex-4-yn-3-ol (90b) with lithium aluminium hydride (deuteride). Cyclopropane derivatives were also isolated and the mode of formation of propenyl-cyclopropane (125) established. In an attempt to determine the effect of ring size in intramolecular solvation, 1-methoxy-2-phenylpent-3-yn-2-ol (136), 1-methoxy-3-phenylhex-4-yn-3-ol (137) and 7-methoxy-4-phenylhept- 2-yn-4-ol (138), were synthesized and their reactions with lithium aluminium hydride (deuteride) in diethyl ether, tetrahydrofuran or 2,5-dimethyltetrahydrofuran were studied. It was observed that intramolecular solvation occurs for methoxy compounds (136) and (137) but not for (138); these results are discussed. A semi-quantitative rate comparison was made for the reactions of 2,2-dimethyl-3-phenylhex-4-yn-3-ol (90a), its 1-methoxy-(90b) and 1,1-dimethoxy-(98) derivatives, when reduced by lithium aluminium hydride (deuteride) in benzene solvent. Similar work was undertaken on 2-phenylpent-3-yn-2-ol (18), its 1-methoxy derivative (136), and methoxy alkynols (137) and (138). Rate enhancement was only observed when the alkynols contained an internal ether moiety

Total Diet Studies

XXVI, 550 p. 74 illus., 45 illus. in color.onlin