Margaret N. Clayton

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1 Alfred Wegener Institute for Polar and Marine Research, Am Handelshafen 12, D-27570 Bremerhaven, Germany, 2 Biologische Anstalt Helgoland, Alfred Wegener Institute for Polar and Marine Research, PO Box 180, D-27483 Helgoland, Germany, 3 Plant Ecophysiology, University of Konstanz, Universitätsstr. 10, D-78464 Konstanz, Germany, 4 School of Biological(More)
Much evidence suggests that life originated in hydrothermal habitats, and for much of the time since the origin of cyanobacteria (at least 2.5 Ga ago) and of eukaryotic algae (at least 2.1 Ga ago) the average sea surface and land surface temperatures were higher than they are today. However, there have been at least four significant glacial episodes prior(More)
We investigated, for the first time in a microscopic study, the accumulation of phlorotannins as a possible inducible chemical defence against herbivory. Ecklonia radiata (C. Agardh) was mechanically wounded with a cork borer, simulating grazer action, and at intervals of 0, 1, 2, 3, 5, 7 and 9 days after wounding the distribution of phlorotannins and other(More)
BACKGROUND Social media (SoMe) use is quickly accelerating in healthcare delivery. Evidence-based SoMe use may improve patient engagement and communication, leading to better outcomes. AIM To assess patient use of and preferences regarding SoMe in their health care. METHODS A descriptive survey was conducted using an 11-item questionnaire that was(More)
 During visits to several localities on the South Shetland Islands and the Antarctic Peninsula in summer 1994 we made collections of marine benthic algae. Among the algae we collected were three new records for Antarctica [Petalonia fascia (OF Müller) Kuntze; Enteromorpha intestinalis (L.) Nees; Rhodymenia subantarctica Ricker] and seven other species(More)
The functional significance of phlorotannins as ultraviolet radiation screens in brown algae is presented. Spectral analysis of zoospore suspensions of the three Arctic Laminariales Saccorhiza dermatodea, Alaria esculenta and Laminaria digitata showed strong absorption in the UV waveband, characteristic of phlorotannins. An induction in the synthesis of the(More)
During the past decade, there has been a dramatic increase in the number of patients presenting with skin and soft tissue infections in the outpatient setting. The predominant causative bacterium for these infections has recently been identified as community-associated methicillin-resistant Staphylococcus aureus (CA-MRSA). It is estimated that nearly 80% of(More)
The linear hexitol altritol has only been identified in six genera, all of them in the order Fucales of the brown algae. Five of these genera are closely related according to molecular phylogenetic and other data, while the sixth (Notheia) is an obligate epiphyte on two other altritol-containing genera with which it is symphanic. The possibility that(More)
found that the prominent absorbance peaks in I-IPLC chromatograms of crude extracts of cockroach corpora cardiaca correspond to the myoactive as well as to the hypertrehalosaemic fractions; myoactive and hypertrehalosaemic factors have identical amino acid compositions and the purified peptides show the same chromatographic characteristics; on a molar(More)
Hormosira banksii is a taxonomically isolated brown seaweed endemic to Australia and New Zealand. The sperm attractant of this species has been isolated and identified as trans-1-vinyl-2-(1E, 3Z-hexadienyl)-cyclopropane (I) (hormosirene).Hormosira is the first organism in which a cyclopropane derivative has been found to act as a hormone in sexual(More)