Results 131 to 140 of about 2,249 (177)

The effects of chloramphenicol on Ulva lactuca

Chemosphere, 2013
The administration of pharmacological substances in the food producing industry is a crucial and long established practice in ensuring animal welfare. However, a very high percentage of the drugs used will directly or indirectly be present in the various compartments of natural ecosystems therefore constituting a source of pollution. The reactions that
Sara, Leston, Margarida, Nunes, Ivan, Viegas, Fernando, Ramos, Miguel Ângelo, Pardal   +4 more
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The effects of the nitrofuran furaltadone on Ulva lactuca

Chemosphere, 2011
The use of pharmaceuticals in the food production industry as prophylatic and therapeutic agents is necessary to promote animal health, but may entail significant consequences to natural ecosystems, especially in the cases of overdosing and use of banned pharmaceuticals. The vast effects that antibiotics released into the environment have on non-target
Leston, Sara, Nunes, Margarida, Viegas, Ivan, Lemos, Marco F. L., Freitas, Andreia, Barbosa, Jorge, Ramos, Fernando, Pardal, Miguel A.   +7 more
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Photosynthetic studies on Ulva lactuca

Phytochemistry, 1972
Abstract The photosynthetic fixation of 14CO2 was studied in Ulva lactuca. Sucrose was the most highly labelled sugar, although glucose, fructose, xylose and myo-inositol also incorporated radioactivity. Starch and the sulphated polysaccharide were extracted and the radioactivity of each was measured, as was that of the constituent sugars of the ...
Elizabeth Percival, Berit Smestad
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Glycoproteins from ulva lactuca

Phytochemistry, 1987
Abstract Ulva lactuca yielded glycoprotein materials which differed significantly in their carbohydrate and protein moieties. The electrophoretic patterns of the isolated materials showed the presence in each of glycoprotein and polysaccharide components. All the glycoprotein components moved towards the cathode. The glycoprotein material isolated
A.Fouad Abdel-fattah, H.Hussein Sary
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Norisoprenoids fromUlvalactuca

Journal of Asian Natural Products Research, 2007
Five norisoprenoids were isolated from the green marine alga Ulva lactuca. Two new compounds were assigned to (3R,5R,6R,7E)3,5,6-trihydroxy-7-megastigmen-9-one (1) and (3S,5R,6S,7E)3,5,6-trihydroxy-7-megastigmen-9-one (2). The structures and absolute configurations of the five compounds were determined by analyses of NMR, MS and circular dichroism (CD).
Y, Sun, Y-C, Zhan, Y, Sha, Y-H, Pei
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Seasonal changes in the constituents of Ulva lactuca

Phytochemistry, 1973
Abstract The green marine algal species Ulva lactuca, contains appreciable amounts of lipids, but there is no correlation between the lipid content and its unsaponified fraction. The sterol content of this alga depended on the proportion of the unsaponified lipid fraction in total lipids.
A.F. Abdel-Fattah, M. Edrees
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Interactions of silver nanoparticles with the marine macroalga, Ulva lactuca

Ecotoxicology, 2011
The marine macroalga, Ulva lactuca, has been exposed for 48 h to different concentrations of Ag added as either silver nanoparticles (AgNP) or aqueous metal (AgNO(3)) and the resulting toxicity, estimated from reductions in quenching of chlorophyll-a fluorescence, and accumulation of Ag measured.
Andrew, Turner, David, Brice, Murray T, Brown   +2 more
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Ulva lactuca

2006
Enthält 1 Bild des Meersalats.
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Isolation of a Polysaccharide with Antiviral Effect from Ulva Lactuca

Preparative Biochemistry, 1994
A polysaccharide from the green marine algae Ulva lactuca has been isolated. The substance has been investigated after acid hydrolysis by thin-layer and gas chromatography. The following carbohydrate components have been found: arabinose-xylose-rhamnose-galactose-mannose-glucose in ratio 1:1:9:5:2.5:16 respectively.
V, Ivanova, R, Rouseva, M, Kolarova, J, Serkedjieva, R, Rachev, N, Manolova   +5 more
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The Ionic Relations of Ulva lactuca

Journal of Plant Physiology, 1988
Summary The ionic relations of the marine green alga, Ulva lactuca (L.) Grev. have been studied in seawater ([K+]o, 10.1 mol m-3; [Na+]o, 468 mol m-3; [CI-]o, 547 mol m-3). The membrane potential (Δψi,o) was -39 ∓ 1.1mV in the light and -25∓1.9mV in the dark (∓95% confidence limits), based on micro-electrode measurements.
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