Results 181 to 190 of about 10,236 (220)
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Photosynthetic studies on Ulva lactuca
Phytochemistry, 1972Abstract 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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The effects of chloramphenicol on Ulva lactuca
Chemosphere, 2013The 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 +4 more
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Studies on urease extracted from Ulva lactuca
Hydrobiologia, 1984Urea is an excellent nitrogen source for the growth of many algae (Syrett 1962; Naylor 1970). In algae, the enzymes which degrade urea are urease and ATP: urea amidolyase (U ALase) (Leftley & Syrett 1973). The properties of urease and U ALase are obviously different; consequently, they can be easily distinguished in extracts. U ALase requires ATP, Mg2+,
I. A. Bekheet +2 more
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Energy Production from Sea Lettuce (Ulva Lactuca)
2010In cooperation with National Environmental Research Institute, Risø DTU National Laboratory for Sustainable Energy and DONG Energy, Danish Technological Institute is manager of the project “Energy Production from Marine Biomass (Ulva lactuca)” which runs from 2008 to 2011.
Nikolaisen, Lars +7 more
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The Ionic Relations of Ulva lactuca
Journal of Plant Physiology, 1988Summary 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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Osmotic adaptation in Ulva lactuca under fluctuating salinity regimes
Planta, 1982A study has been made of the osmotic responses of the green intertidal alga, Ulva lactuca, under two fluctuating salinity regimes; sinusoidal and square-wave fluctuations between 30 and 100% sea water in a 12 h cycle. These regimes closely resemble the tidal fluctuation of salinity encountered by the alga in its natural estuarine habitat.
D M, Dickson +2 more
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The effects of the nitrofuran furaltadone on Ulva lactuca
Chemosphere, 2011The 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 +7 more
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Fresh Ulva Lactuca Alcoholic Fermentation Products and yields
Revista de Chimie, 2018The optimization of the ethanol yield obtained by alcoholic fermentation of fresh Ulva lactuca in the presence of cellulase and Saccharomyces cerevisiae yeast was performed. Three main factors affecting the process were considered: the solid-to-liquid ratio (S), cellulase-to-algal biomass ratio (R), expressed as cellulase units (U) per gram of dry ...
Doinita Roxana Cioroiu +3 more
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Ulva Lactuca: Adsorption, Bioaccumulation and Remediation
2020Pollution of natural waters has become a major issue all over the world. As a result, scientists are studying new and alternative technologies not only to identify the presence of different pollutants in the environments but to remove them from waters and industrial effluents.
Areco, María del Mar +2 more
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