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Showing 1 to 20 of 43 for “"RED ALGAE"”.
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Antimycobacterial activity of the red algae gelidium pristoides, plocamium corallorhiza and polysiphonia virgata
In 1993, the World Health Organisation declared tuberculosis a global health emergency. Currently, efforts are underway to improve the way the disease is managed and to find more effective treatments that would combat the problem of long treatment periods, toxicity, drug-resistance and …
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I. The Participation of Chlorophyll and Phycobilins in The Photosynthesisof Red Algae. Ii. Observations on Cellular Structures of Porphyridium Cruentum
Made available in DSpace on 2014-12-05T20:55:36Z (GMT). No. of bitstreams: 1 5801686.pdf: 4845393 bytes, checksum: cb9b77ee01dd47f5ed930e1e34b585ee (MD5) Previous issue date: 1958
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Measuring the growth of the articulated coralline red algae Corrallina officinalis and Arthrocardia corymbosa, (Corallinaceae, Rhodophyta) using a fluorescent brightener
Coralline algae are important components of the coastal marine ecosystem, making it crucial to understand influences on their production and their growth rate in general. A few attempts have been made to quantify coralline growth rate using various methods, however since they have been reported to …
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Using the growth patterns and geochemistry of coralline red algae to develop proxies for paleoclimate reconstruction in tropical and subarctic environments
… forms (i.e. rhodoliths) of crustose coralline red algae (CCA) as geochemical proxy sources for paleoenvironmental and paleoclimate reconstructions. Rhodoliths (Lithothamnion sp.) from the Gulf of Panama (GOP), Panama were grown in a microcosm experiment to evaluate growth patterns and rates. …
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Host pathogen interaction between European strains of red algae 'Bangia' and oomycete Olpidiopsis porphyrae var. scotiae, and phylogenetic analysis for European 'Bangia' strains
… var. scotiae. I studied the resistance of 11 red algae (‘Bangia’) strains against this new described variety by using microscopy inspection and qPCR assay. Results from microscopy inspection showed significant effect for ‘Bangia’ strains on incubation period (days from inoculation until …
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Rhodoliths as environmental archives in the tropics
… are free-living forms of calcareous, coralline red algae that are found worldwide, from the tropics to the poles, in relatively shallow (0->250m) waters. They can live hundreds of years and continuously form a high-Mg calcite skeleton that presents periodical growth bands. Recent coralline red …
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Rhodoliths as environmental archives in the tropics
… are free-living forms of calcareous, coralline red algae that are found worldwide, from the tropics to the poles, in relatively shallow (0->250m) waters. They can live hundreds of years and continuously form a high-Mg calcite skeleton that presents periodical growth bands. Recent coralline red …
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The Burrowing Barnacles (Cirripedia, Acrothoracica) of South Africa
… after the last publication on this group appeared. A new host category for acrothoracicans is described in Chapter 1, as Weltneria spinosa was collected from coralline red algae. This finding was not an isolated event, as this species was found inhabiting four different species of coralline …
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Resource Partitioning in Seven Species of Sympatric Intertidal Chitons (Mollusca: Polyplacophora)
… ~· ciliata, M. lignosa, and T. lineata preferred slopes or undersides of rocks while ~· muscosa, K. tunicata, and c. dentiens occurred on the top horizontal surfaces or in more exposed habitats. Chitons differed significantly in their associations with Lithothamnion, macrophytic algae, Ulva, …
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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 …
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The physiology and biochemistry of the Laminaria Pallida/Carpoblepharis Minima and Ecklonia Maxima/Suhria Vittata associations from South-Western Cape waters, South Africa
The two laminarian brown algae Laminaria pallida Grev. ex. J. Ag. and Eoklonia maxima (Osb.) Papenf. are important both economically and as major components of the South-western Cape waters, South Africa. Growing attached to these brown algae are several different species of red algae two of which, …
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Marine natural products as antimicrobial chemical defenses and sources of potential drugs
… of 15 novel natural products from two tropical red algae, Callophycus serratus and an unidentified crustose red alga. These new molecules included seven novel carbon-carbon connectivity patterns, not previously reported in the synthetic or natural product literature, illustrating the abundance …
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Integrated, Basin-To-Reservoir Scale, Geologic and Geophysical Studies of a Carbonate-Hosted, Hydrocarbon Reservoir of the La Vela Basin, Northwestern Venezuela
… gas giant - hosted in a 300-m-thick, carbonate (red algae) reservoir - stimulated reevaluation of potential hydrocarbon reservoirs in Cenozoic carbonate rocks in northwestern South America. I use regional gravity and magnetic data integrated with a basin-scale database of 1100 km2 of 3D seismic …
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A phenological study of coalescence in two South African Gigartinales, Gigartina polycarpa (Kützing) Setchell et Gardner and Sarcothalia stiriata (Turner) Leister
… has been described in a number of coalescing red algae, however the majority of studies are laboratory based. This study examines the phenology of clumping characteristics in Gigartina polycarpa and Sarcothalia stiriata in the field. Clumps of these two species appear to have a coalesced …
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Detached macrophyte accumulations in surf zones: Significance of macrophyte type and volume in supporting secondary production
Detached macrophytes (sea grass and macroalgae) are transported from more offshore areas and accumulate in large volumes in surf zones, where they are commonly called wrack. In coastal regions in other parts of the world, wrack transported from one habitat to a second habitat can be considered as a …
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SOME CHEMICAL CONSTITUENTS OF THE BROWN ALGA, AGARUM CRIBOSUM AND THE EFFECT OF ELECTROSTATIC INTERACTIONS ON THE STEREOCHEMISTRY OF THE S(N)2' REACTION
… constituents. Halogenated terpenes found in red algae were not present in this seaweed. The sterol content was determined by GC/MS analysis and six sterols were identified: fucosterol, 24-methylenecholesterol, cholesterol, 24-ketocholesterol, saringosterol, and desmosterol. The presence of …
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Shallow subtidal seaweed communities of the Agulhas Marine Province of South Africa
… from O.3m to 2.5m. Within these quadrats all algae were destructively sampled (excluding encrusting algae), invertebrate grazers present were counted, and environmental measurements were taken. These environmental measurements included depth and slope, with temperature data supplied from a …
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The abundance and diversity patterns of seaweed communities on natural and artificial substrata at Sodwana Bay, South Africa
… coral communities of southern Africa suffered minimal impacts during mass bleaching events in the recent past. However, during the 2005 warm-water anomaly in the southern Indian Ocean, coral bleaching reached unprecedented levels. There is surprisingly little known about the fate of …
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Nickel-catalyzed coupling reactions and synthetic studies toward ent-dioxepandehydrothyrsiferol via an epoxide-opening cascade
… ether natural product isolated from the red algae Laurencia viridis.
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