Changes in organ blood flow between high and low voltage electrocortical activity in fetal sheep

The effect of spontaneous changes in high or low voltage electrocortical activity, in the absence of uterine contractions, on the regional distribution of blood flow was studied in normoxic unanaesthetized fetal sheep at 124-134 days gestation in utero, using the isotope-labelled microsphere method. On transition from high to low voltage there was a significant fall in arterial pressure (7%) and an increase in flow (19-38%) to areas of the brain corresponding to the arborization of the reticular formation, i.e. excluding the cerebrum and cerebellum. Blood flow to the gastro-intestinal tract, pancreas and liver (portal vein) also increased.     

The effects of phosphate on the biomineralization of the green alga, Halimeda incrassata (Ellis) Lam.

Field surveys indicated that individuals of Halimeda incrassata (Ellis) Lamouroux, a rhizophytic alga, were significantly more mineralized when collected from phosphate-limited carbonate sediments of the Florida Keys than those collected from siliciclastic sediments at Tarpon Springs on the west coast of Florida. Results from field experiments in Tarpon Springs, which compared growth of H. incrassata in enriched conditions to unmanipulated controls, indicated that biomineralization of new growth was significantly lower when phosphate was added to plots. After 18 days in a tank culture experiment, newly produced segments of H. incrassata grown in 20 µM phosphate showed a significant decrease in mineralization compared to the new growth in control tanks. Phosphate enrichment also led to a non-significant increase in segment mortality and a significant decrease in amount of new growth. Results from the survey and experimental studies suggest that biomineralization of H. incrassata is negatively impacted by elevated phosphate levels.     

Neurotensin is an anti-thermogenic peptide produced by lymphatic endothelial cells

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Interaction of phosphonium ions with Arthrobacter globiformis: evidence for the operation of an efflux system

Abstract Substrate-induced efflux of methyltriphenylphosphonium ion (MTP) from Arthrobacter globiformis has been demonstrated using organisms depleted of endogenous reserves by starvation. Further evidence for the operation of a mediated efflux system was provided by studies on the effect of analogues of MTP on MTP accumulation.