Since the original description of Helicosporidium parasiticum in 1921, members of the genus Helicosporidium have been reported to infect a wide variety of invertebrates, but their characterization has remained dependent on occasional reports of infection. Recently, several new Helicosporidium isolates have been successfully maintained in axenic cultures. The ability to produce large quantity of...

Marine-derived bacteria and fungi are promising sources of novel bioactive compounds that are important for drug discovery programs. However, as encountered in terrestrial microorganisms there is a high rate of redundancy that results in the frequent re-discovery of known compounds. Apparently only a part of the biosynthetic genes that are harbored by fungi and bacteria are transcribed under ro...

We conducted a long term (4 week) continuous culture study to measure the chronic effects of UV radiation on the alga, Cryptomonas erosa, using three different fluence rates of UV radiation. We measured carbon allocation into carbohydrate, protein and lipid pools, as well as chlorophyll a concentrations and algal and bacterial density. After 21 days, algal density in the control and lowest UV t...

An axenic culture o f Symphyogyna brongniartii has been initiated from spores on modified Benecke medium. Growth was best on Gamborg B5 medium with 0.3% sucrose, with a doubling time o f 36 days. The culture produced the same terpenoids as plants growing in their natural habitat, perrottetianal A being the major constituent. Also found were bicyclogermacrene, ß-barbatene, 8-selinene, ß-cubebene...

Algal growth is often inhibited in full-strength anaerobic digestate. The objective of this study was to investigate conditions under which digestate pretreatment using bacteria effective promoting algal growth, nutrient removal, and favorable changes biomass composition. Batch culture experiments were carried out low- high-strength municipal sludge digestate, two algae strains varying sensitiv...

Some compounds articulated around a piperazine or an ethylenediamine linker have been evaluated in vitro to determine their activity in the presence of a 3T6 fibroblast cell line and an axenic culture of Pneumocystis carinii, respectively. The most efficient antifungal derivatives, namely N,N'-bis(benzamidine-4-yl)ethane-1,2-diamine (compound 6, a diamidine) and N-(benzamidine-4-yl)-N'-phenylet...

Leptolyngbya sp. strain Heron Island is a cyanobacterium exhibiting chromatic acclimation. However, this strain has strong interactions with other bacteria, making it impossible to obtain axenic cultures for sequencing. A protocol involving an analysis of tetranucleotide frequencies, G+C content, and BLAST searches has been described for separating the cyanobacterial scaffolds from those of its...