Results 181 to 190 of about 10,870 (220)

Is Ascophyllum nodosum Lichenized ?

Botanica Marina, 1972
In a recent synopsis on Ascophyllum nodosum (L.) LE JOLIS, BAARDSETH (1970) accumulates all Information available on this common brown alga. This author rnentions briefly the presence o£ fungal hyphae that are never absent from any part o£ Ascophyllum and expresses bis uncertainty about the question if these hyphae belong t o the Asconnycete, described
JAN KOHLMEYER, ERIKA KOHLMEYER
openaire   +1 more source

A fucoidan fraction from Ascophyllum nodosum

Carbohydrate Research, 2001
A fucoidan fraction was purified from the brown alga Ascophyllum nodosum. The polysaccharide contained L-fucose and sulfate as the only constituents. Combination of methylation analysis, Smith degradation, FTIR and NMR spectroscopy on the native and the de-sulfated polymers demonstrated that the fucoidan consisted of a highly branched core region with ...
Marais, M.F., Joseleau, J.P.
openaire   +2 more sources

Biological degradation of Ascophyllum nodosum

Journal of Applied Phycology, 1997
The alginate forms the major structural component of the cell wall and the intercellular matrix of the brown alga Ascophyllum nodosum. Successful biological degradation of A. nodosum would largely depend on the dissolution of the alginate, but reactive compounds in the alga such as polyphenols may also have toxic effects on the microbial population ...
Einar Moen, Svein Horn, Kjetill Østgaard   +2 more
openaire   +1 more source

THE UPTAKE OF RADIOACTIVE IODINE BY ASCOPHYLLUM

The Biological Bulletin, 1951
During the course of experiments designed to determine the relation between respiration and iodine uptake in brown algae (to be published elsewhere), it was observed that the uptake of radioactive iodine followed over a period of 15-20 hours gave a definite pattern of behavior.
S, KELLY, N A, BAILY
openaire   +2 more sources

Sterols in Ascophyllum nodosum

Phytochemistry, 1970
Abstract In stored, milled, dried Ascophyllum nodosum, saringosterol, 24-ketocholesterol, fucosterol, 24-methylenecholesterol, 24-methyl-Δ5,22-cholestadien-3β-ol, cholesterol and a trace of 24-ethylcholesterol were detected in the sterol fraction. Whereas, from freshly harvested and dried A.
openaire   +1 more source

Some structural aspects of vanadium bromoperoxidase from Ascophyllum nodosum

Biochimica et Biophysica Acta (BBA) - Protein Structure and Molecular Enzymology, 1990
The stability of the vanadium containing bromoperoxidase from Ascophyllum nodosum was studied. The enzyme was very resistant against chemical denaturation. Denaturation did not occur upon incubation in 4 M guanidine hydrochloride. Circular dichroism measurements showed that the secondary structure was not affected upon incubation in 4% sodium dodecyl ...
M G, Tromp, G, Olafsson, B E, Krenn, R, Wever   +3 more
openaire   +2 more sources

Vanadium K-edge absorption spectrum of bromoperoxidase from Ascophyllum nodosum

Biochimica et Biophysica Acta (BBA) - Protein Structure and Molecular Enzymology, 1988
With synchrotron radiation from the Bonn 2.5 GeV synchrotron, high-resolution absorption spectra have been measured at the vanadium K-edge of bromoperoxidase from the marine brown alga Ascophyllum nodosum and several model compounds. The near-edge structure (XANES) of these spectra was used to determine the charge state and the coordination geometry ...
J, Hormes, U, Kuetgens, R, Chauvistre, W, Schreiber, N, Anders, H, Vilter, D, Rehder, C, Weidemann   +7 more
openaire   +2 more sources

Bromoperoxidase from Ascophyllum nodosum: a novel class of enzymes containing vanadium as a prosthetic group?

Biochimica et Biophysica Acta (BBA) - Protein Structure and Molecular Enzymology, 1986
Abstract Reconstitution experiments showed that the transition metal vanadium is essential for enzymic activity of bromoperoxidase from the marine brown alga Ascophyllum nodosum. A linear relationship existed between brominating activity and the amount of vanadium incorporated in the enzyme.
de Boer, E., van Kooyk, Y., Tromp, M. G.M., Plat, H., Wever, R.   +4 more
openaire   +2 more sources

Cytokinin-like activity in sea water from theFucus-Ascophyllum zone

Experientia, 1972
Les resultats indiquent la presence de cytokinines dans l'eau de mer de la zone deFucus-Ascophyllum. Des cultures de tissus deNicotiana ont ete employes pour prouver l'activite des cytokinines.
M, Pedersén, G, Fridborg
openaire   +2 more sources

Do littorinids affect the survival of Ascophyllum nodosum germlings?

Journal of Experimental Marine Biology and Ecology, 1997
Abstract The survival of germlings of the brown alga Ascophyllum nodosum on the west coast of Sweden were investigated in two field experiments. In the first experiment the role of Littorina fabalis , L. littorea , L. obtusata and L. saxatilis for the survival of 5 days old germlings were tested at two spatial scales, by comparing plots ...
Gunnar Cervin, Per Åberg
openaire   +1 more source