Syntaxonomic position of Hydrocharitetum morsus-ranae van Langendonck 1935

Symmetric and asymmetric mitosis and cytokinesis in the root tip of Hydrocharis morsus-ranae L.

In the roots of Hydrocharis morsus-ranae, certain cells of the protoderm divide asymmetrically to form a small, highly cytoplasmic trichoblast proximally, and a larger, more vacuolate epidermal cell distally. The former develops as a root hair without further division; the latter divides several times to form ordinary epidermal cells. During mitosis, presumed dictyosome vesicles and fragments o...

Shading as a Control Method for Invasive European Frogbit (Hydrocharis morsus-ranae L.)

Invasive European frogbit (Hydrocharis morsus-ranae L.) has negative environmental and economic impacts in North American water bodies. It is therefore important to develop effective management tools to control this invasive species. This study investigated shading as a control method for European frogbit in both greenhouse and lake mesocosm experiments. A series of shade treatments (0%, 50%, 6...

Spirochæta Morsus Muris, N.sp., the Cause of Rat-bite Fever

1. Since our first report on the discovery of the cause of rat-bite fever, we have been able to prove the existence of the same spirochete in five out of six more cases which have come under our observation. 2. The clinical symptoms of rat-bite fever are inflammation of the bitten parts, paroxysms of fever of the relapsing type, swelling of the lymph glands, and eruption of the skin, all occurr...

Prognosis. Volume I. 1935

Roger Needham, 1935-2003

Cambridge Research Lab, which he founded in 1997. Prior to joining Microsoft, he was associated with Cambridge University for nearly half a century—as an undergraduate and graduate student, as a researcher, and eventually as a professor and head of the Computer Laboratory. In this EIC message, I focus on the significance of Needham's research contributions to pervasive computing. These contribu...