Results 181 to 190 of about 10,279 (217)

Studies on urease extracted from Ulva lactuca

Hydrobiologia, 1984
Urea 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, K. M. Kandil, N. Z. Shaban   +2 more
openaire   +1 more source

Energy Production from Sea Lettuce (Ulva Lactuca)

2010
In 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, Dahl, Jonas, Bech, Karin Svane, Bruhn, Annette, Rasmussen, Michael Bo, Thomsen, Anne Belinda, Nielsen, Henrik Bangsø, Sander, Bo   +7 more
openaire   +2 more sources

Ulva lactuca

2006
Enthält 1 Bild des Meersalats.
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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.
openaire   +1 more source

Osmotic adaptation in Ulva lactuca under fluctuating salinity regimes

Planta, 1982
A 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, R G, Wyn Jones, J, Davenport   +2 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
openaire   +3 more sources

Fresh Ulva Lactuca Alcoholic Fermentation Products and yields

Revista de Chimie, 2018
The 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, Claudia Irina Koncsag, Dragos Gudovan, Tanase Dobre   +3 more
openaire   +1 more source

Ulva Lactuca: Adsorption, Bioaccumulation and Remediation

2020
Pollution 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, Salomone, Vanesa Natalia, Dos Santos Afonso, María   +2 more
openaire   +1 more source

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
openaire   +1 more source

Extracellular alkaline phosphatase activity in Ulva lactuca L.

Journal of Experimental Marine Biology and Ecology, 1989
Extracellular alkaline phosphatase activity (APA) was detected in the marine macroalga Ulva lactuca, cultivated in laboratory conditions under phosphate limitation. Algal discs were grown in continuous light and in darkness for a maximum of 205 h in sterilized seawater supplied with ammonium nitrate and various phosphate concentrations.
Rainer G. Weich, Edna Granéli
openaire   +1 more source