M. J. Musmar

Comparison of peak expiratory flow rates applying European and Iranian equations to Palestinian students.

Measurement of peak expiratory flow rate (PEFR) is required for effective asthma treatment, but ethnic differences affect the application of prediction equations for lung function. PEFR was measured in a representative sample of 1000 students in Nablus, Palestine. Predicted PEFR equations for Europeans and Iranians were applied to both males and females in age groups < 21 and > or = 21 years. There was a statistically significant correlation between the predicted PEFR values in Palestinians and both equations in both males and females regardless of age. Equations developed on Iranians were more useful for Palestinians than the European equations, but there is a need to develop our own nomograms.

Osmium(VIII)-Catalyzed Oxidation of Some Cyclic Amines by Potassium Hexacyanoferrate(III) in Alkaline Media: a Kinetics and Mechanistic Study

Reactions of morpholine, piperidine, and piperazine with Os(VIII)-catalyzed hexacyanoferrate(III) in alkaline media to produce the corresponding lactam have been studied at constant temperature and ionic strength. The reactions followed first-order kinetics with respect to [amine] and [Os(VIII)] but were independent of [Fe(CN)63-] and [OH-]. The effects of introduced electrolytes, potassium hexacyanoferrate(II), relative permitivity, and temperature have also been studied. A mechanism accounting for these results has been proposed.

Two Dimensional NMR Studies of Marine Natural Products. III.1 Reassignment of the 13C-NMR Spectrum of Brianthein-X Using Heteronuclear Relayed Coherence Transfer

Abstract During an investigation of the diterpene constituents of Briareum asbestinum we isolated the previously reported brianthein-X. Through the use of two-dimensional heteronuclear chemical shift correlation and relayed coherence transfer, four of the previously reported 13C-resonance assignments are revised.

1,4,6,9-Tetraazathianthrene: a planar thianthrene, C8H4N4S2

The molecule of the title compound, 5,10-dithia-1,4,6,9-tetraaza-5,10-dihydroanthracene, lies around an inversion center and is nearly planar the maximum deviation from planarity is 0.018(1) A for S5]. As a result of the planarity of the molecule, the C-S-C angle, 105.74 (7) o , is among the largest observed for thianthrenes, as are the C-C-S angles of the central ring which are 126.68 (11) and 127.57 (11) o