Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
Results
Showing 1 to 20 of 48 for “"Blue-green algae"”.
-
The use of image processing techniques for the automated detection of blue-green algae
… existence of particular organisms, for example blue-green algae. Currently the detection of these algae is done in a very time consuming manual way, involving highly trained biologists, for example those employed by the National Rivers Authority. This thesis is a first investigation in the …
-
Mathematical modelling of the development of cyanobacteria (blue-green algae) in an eutrophical lake, including aspects of toxicology
Cyanobacteria (blue-green algae) are present in most natural water systems throughout the world. They have a tendency, under certain conditions, to become over-buoyant and thus form a water bloom or "surface scum". Often, in conjunc tion with the formation of a water bloom, a release of …
-
Study of mutation, mutants, and repair in the blue-green alga Agmenellum quadruplicatum
The study of induced mutation in blue-green algae can be expected to yield significant information in several areas. First, it is desirable to know which mutagens are capable of causing stable mutations in blue-greens. Several mutagens have been reported to cause mutation in blue-green algae; but …
-
Autecology, Development and Diagenesis of a Phylloid Stromatolitic Blue Green Algal bioherm, Laborcita formation, Sacramento Mountains, New Mexico
… near Tularosa, New Mexico, is comprised of blue green algal bound phylloid algal wackestones and packstones. It contains a restricted fauna of erect, interlocking phylloid algae encrusted by wavy, digitate, and botryoidal masses of blue green algae and other minor epibionts. Primary void …
-
Ammonia uptake by phytoplankton and limnological studies of Mountain Lake, Virginia
… declined and the community became dominated by blue-green algae. When allochthonous inputs of inorganic nitrogen renewed the levels of ammonia-nitrogen, Vmax values increased and the community changed, replacing the blue-green algae. Communities dominated by green algae (Chlorophyta) had higher …
-
ΕΡΕΥΝΕΣ ΕΠΙ ΚΥΑΝΟΦΥΚΩΝ ΕΔΑΦΟΥΣ ΠΕΡΙΟΧΩΝ ΤΗΣ ΕΥΒΟΙΑΣ. ΤΑΞΙΝΟΜΙΚΗ, ΧΛΩΡΙΔΙΚΗ ΦΥΤΟΓΕΩΓΡΑΦΙΚΗ, ΟΙΚΟΛΟΓΙΚΗ ΜΕΛΕΤΗ
A SHORT HISTORICAL REVIEW OF THE SOIL BLUE-GREEN ALGAE RESEARCH THROUGHOUT THE WORLD IS SUMMARIZED IN THE BEGINNING. DATA ON THE ECOLOGY OF THE EDAPHIC BLUE-GREEN ALGAE AND THEIR ROLE IN THE SOIL ARE NOTED. THE METHODS APPLIED IN THE SAMPLING AND TREATMENT OF THE MATERIAL, AS WELL AS THE …
-
Trihalomethane-forming potential of algal extracellular products and biomass
… trihalogenated methanes. Two species each of green and blue-green algae were cultured in an inorganic medium and harvested on several days throughout the growth cycle. Media filtrates and cell suspensions were analyzed for total organic carbon and chloroform produced after chlorination. Pure …
-
Effects of light and temperature on nitrogen-fixation rates in arable soils and seasonal fluctuations in nitrogen-fixation rates in arable soils
… the fixation was a surface area phenomenon with blue-green algae being responsible for most of the N₂[C₂H₂]-fixation which occurred. The responses of the two soils to light and day temperature varied widely among the four sampling dates indicating that it was not possible to predict amounts of …
-
Trihalomethane formation potential of algal extracellular products and biomass
… was conducted to determine the importance of algae as sources of orgnanic precursors in the haloform reaction. Two species each of green and blue-green algae were grown in laboratory conditions and harvested periodically during their growth cycle. The principal part of the study was directed …
-
Microbiological influences on phosphorus release from aerobic lake sediments
… in cultures inoculated with bacteria and/or blue-green algae collected from the Occoquan Reservoir. Inoculum composition was maintained for the thirty-five-day incubation period with selective inhibitors. An abiotic culture series served as a control. Cultures were harvested at five-day …
-
The response of 'Buttercrunch' lettuce to applications of cyanobacterium (Nostoc muscorum) in nutrient solution
Two separate greenhouse esperiments were conducted to determine the effects of additions of a blue-green algae (Nostoc muscorum) to nutrient solution cultures with different rates of nitrogen fertilizer on the growth of lettuce (Lactuca sativa L. cv. Buttercrunch). Lettuce yields increased with …
-
Phytoplankton Dynamics of Two Northern Prairie Lakes and Possible Relations to Dissolved Nutrients
… a diatom lake while Lake Herman contained mostly blue-green algae. Genera of algae found in Enemy Swim Lake were: Anabaena, Aphanizomenon, Lyngbya, Pediastrum, Staurastrum, Dinobyron, Asterionella, Fragilaria, Melosira, Stephanodiscus, and Ceratium. All of the above genera occurred in Lake Herman …
-
Food Habits and Biology of Stonerollers (Campostoma) in Southwest Missouri
… Diet also included (by volume): diatoms, 11-45%; green-blue green algae, 0-17%; and detritus, 41-70%. Young-of-year stonerollers were found to have a consumption rate of 0.0144 ml/g body wt. /hour during the day with maximum intestinal volume occurring at dusk. Daily ration, measured in September, …
-
Effects of selected pollutants on grazer utilization of Aufwuchs
… caloric content through gravimetric, Coomassie blue staining, anthrone staining, and wet chemical oxidation procedures, respectively. Snail (Pleuroceridae:Anculosa) utilization of Aufwuchs from the variously perturbed environments was assessed through laboratory feeding studies employing …
-
Limnology of Three Farm Ponds in South-Central South Dakota
… Phytoplankton population were dominated by a blue-green algae, Microcystis, which reached a maximum population of 9.3 cc/m3. Maximum primary production recorded was 0.78 gms/m2/day. Copepods in the ponds constituted approximately 75% of the total zooplankton, while cladocerans constituted 15%, …
-
Some South African red seaweed polysaccharides
Algae have been classified by botanists into four large groups: the Chlorophyceae or green algae, the Phaeophyceae or brown algae, the Rhodophyceae or red algae, and the Cyanophyceae or blue-green algae. The polysaccharides which are extracted from marine algae may be differentiated into reserve …
-
Synthesis of Novel Chiral Heterocyclic Compounds for Antibacterial Agents and Peptidomimetics
… of marine natural products isolated from a blue-green algae, which display inhibitory activity against serine proteases such as thrombin, trypsin, and factor VIIa. Most aeruginosins contain an heterocyclic moiety called the 2-carboxy-6-hydroxyoctahydroindole (Choi) ring; this Choi moiety is …
Page 1 of 3