Algae collections

A month-long study of the effects of ultraviolet radiation (UV) on phytoplankton and ice-algae collected from Arthur Harbor, Anvers Island, Antarctica, was carried out during November-December 1987. The parameters studied included primary production rates, photosynthetic... 

Tin concentrations in algae collected near the Scripps Institution of Oceanography, Calif, and in coastal marine sediments from Narragansett Bay, USA, were determined by Hodge and coworkers42. Tin concentrations of the blades of Pelagophycus porra, Macrocystis pyrifera and Eisenia arborea were 0.71 0.01, 0.83 0.01 and 1.06 0.02 i-gSng 1 dry wt., respectively. Tin concentrations in the core of sediments are shown in Table 8. 

Although there had been earlier reports (1-3) of the presence of arsenic in marine samples, the first comprehensive study was presented by Jones (4) in 1922. He examined marine algae collected from British coastal waters, reporting concentrations of arsenic and information on its extraction with water and ethanol. He referred to the arsenic as organic arsenic and, perhaps somewhat mischievously, remarked that the reputed medicinal properties of some algae may be due to their organic arsenic content. 

One liter in situ samples directly taken on-site, were concentrated by the membrane filtration method for enumerating nannoplankton. A measured volume of a well-mixed sample (20 -100 mL, depending on the number concentration of algae) was filtered at a constant suction rate through a membrane filter having a pore diameter of 0.45 um. The algae collected on the membrane were identified and counted by means of optical compound microscopy. If the identification after membrane filtration is too difficult as a result of alteration of cell shape, the above mentioned settling chamber technique is used. 

National Facility on Blue Green Algae Collection at IARI, New Delhi... 

Optically active polybrominated biindoles 344 and 345 presenting a hindered rotation about the N-C bond have been isolated from Rivularia firma algae collected in Westernport Bay (Australia). They were fully characterized by spin-lattice relaxation data. 

Amounts of agar-agar extracted from marine algae collected at two locations... 

Ali, M., Jahangir, M., Saleem, M., Pervez, M., Hameed, S., and Ahmad, V. (2000). Metabolites of marine algae collected from Karachi-coasts of Arabian sea. Nat. Prod. Sci. 6,61-65. 

Athukorala, Y., Lee, K. W., Kim, S. K., and Jeon, Y. J. (2007). Anticoagulant activity of marine green and brown algae collected from Jeju Island in Korea. Bioresour. Technol. 98, 1711-1716. 

Fucodiphlorethol G (Fig. 33.3), a new compoimd isolated from the methanol extract of E. cava, a brown alga, collected offshore in Jeju Island by Ham et al. (2007). By the examination of and NMR data, it was foimd that the structure of the compoimd is similar to that of trimeric phlorotannin triphlorethol-A (Fig. 33.3). Although these studies evidenced that these compoimds can stimulate osteoblast differentiation at various stages, there is no clear demonstration of whether the phlorotannin compound, Fucodiphlorethol G, has direct effect on osteoblast differentiation. 

HCO utilization can vary considmbly between specimens of green algae collected at different localities. 

Each alga collected was washed with sea water, frozen in liquid nitrogen, ground and extracted by Bligh Dyer method. Positional distribution of fatty acids in lipids were determined by Arao et al.<1987). 

Wake and Hillen (73) first analyzed several wild samples of the A race of B. braunii they noted that hydrocarbon compositions in algae collected in two Australian lakes (Tarago and Sorrento) resembled that observed for a strain from the culture center at Cambridge (75), with essentially the odd carbon numbered C27-C31 cis dienes (1) and the C29 triene (3). Such a hydrocarbon profile where C29 compounds predominate was also found in the collection strain from the culture center at Austin (Table 2) (16). 

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