Learn More
Microbial community composition and structure were characterized in marine sediments contaminated for >80 years with cadmium, copper, lead, and zinc. Four sampling sites that encompass a wide range of sediment metal loads were compared in a Norwegian fjord (Sorfjord). HCl-extractable metals and organic matter constantly decreased from the most contaminated(More)
The accumulation of Cd, Pb, Zn, and Cu in the starfish Asterias rubens was studied in a Norwegian fjord characterized by a gradient of metal pollution in the sediments, ranging from very high metal concentrations at its head to much lower levels at its opening. The concentrations of metals in starfish from natural populations along the gradient (long-term(More)
In anaesthetized dog, the adrenaline induced hypertension is reversed by both alpha 1- and alpha 2-adrenoceptor blocking agents such as AR-C 239 and yohimbine. After alpha 1 or alpha 2 and beta-blockade, adrenaline induced again an increase in blood pressure. This hypertensive effect was suppressed by an alpha 2-adrenoceptor blocking agent when an alpha(More)
To study the effects of metals on starfish in field conditions, immune responses were measured in starfish from natural populations along a metal pollution gradient (long-term contamination) and in starfish that were transferred up the gradient (short-term contamination). Coelomic amoebocyte concentration (CAC) and production of reactive oxygen species(More)
In the pithed rat, (imidazolinyl-2)-2 dihydro 2,3 benzofuran or S 9871 and its stereoisomers were found to block alpha-adrenoceptors. In the present investigation the agonistic effect were studied in pithed rats. With (+/-) and (+) S 9871 this effect is compatible with a stimulation of alpha 1-adrenoceptors and the effect of (-) stereoisomer with a(More)
Peripheral postsynaptic alpha-adrenoceptor blocking properties of six new dihydrobenzofurane and imidazoline derivatives have been investigated in pithed rat against the pressor effects of phenylephrine and cirazoline (alpha 1-agonists) and clonidine and azepexole (alpha 2-agonists). Except for (N-methylimidazolinyl-2)-2 dihydro-2,3 benzofurane (II) that(More)
This poster outlines two application areas developed inside the COSIDE group at the Department of Computer Science, University College London, in particular the Cognitive Browser, “CogBrow” and “Graphical Knowledge Interfaces.” The latter has been carried out in collaboration with The Unit for Architectural Studies at the Bartlett School of Architecture at(More)
The equivalence problem in general relativity arises from the arbitrariness of coordinate choice and is the problem of deciding whether two apparentl Z different space-times are (locally) identical or not. Here we review the basic procedure for resolving this question, and its practical implementation, as presented in previous papers, and report on recent(More)
The effects of the stereoisomers of two alpha adrenoceptor antagonists [S 10089 (Imidazolinyl-2)-2 benzocyclobutane and S 9871 (Imidazolinyl-2)-2 dihydro 2,3 benzofuran] were studied in pithed Rats. Vasoconstriction elicited via stimulation of alpha 1 adrenoceptors by cirazoline was antagonized, stimulation of alpha 2 adrenoceptors by azepexole was also(More)