Studies of visible oscillating chemiluminescence in luminol–H2O2–KSCN–CuSO4 system using (2‐hydroxyethyl) trimethylammonium hydroxide

Visible oscillating chemiluminescence (CL) of luminol–H₂O₂–KSCN–CuSO₄ was studied using the organic base (2‐hydroxyethyl)trimethylammonium hydroxide. The effect of concentrations of luminol, H₂O₂, KSCN, CuSO₄ and the base were investigated in a batch reactor. This report shows how the concentration of components involved in the oscillating CL system influenced the oscillation period, light amplitude and total time of light emission. The oscillating CL with different bases was also investigated. Results indicated that using 2‐HETMAOH causes regular oscillating CL with nearly the same oscillating period. Copyright © 2008 John Wiley & Sons, Ltd.     

Gentianella tumailica (Gentianaceae) – A new species from cold deserts of northwest Himalaya,India

A new species of Gentianella, G. tumailica sp. nov., from Tumail in the Kargil district of Ladakh, northwest Himalaya, India is described and illustrated. This novelity is morphologically similar to the sympatric G. stoliczka in inflorescence pattern, calyx and corolla shapes, sagitate anthers, more or less rounded seeds, but differs in smaller size of vegetative and floral structures, larger basal leaves, few cauline leaves, leaf apex obtuse to rounded, calyx lobes unequal (2 longer, 3 shorter), inflorescence enveloped by 4 foliaceous bracts, capsule elliptic to oblong and seed coat smooth. In addition, a diagnostic key to all Indian species of Gentianella is presented.