Joseph Longworth

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Nitrogen starvation induced changes in carbohydrate and lipid content is described in several algal species. Although these phenotypic changes are desirable, such manipulations also significantly deteriorate culture health, ultimately halting growth. To optimize biofuel production from algae, it is desirable to induce lipid accumulation without compromising(More)
Some properties of a small RNA virus isolated from larvae of Heteronychus arator [Coleoptera: Scarabaeidae] are described. The virus develops in the cytoplasm of gut and fat body cells and is 30 nm in diamter. The sedimentation coefficient of virus was 137S and the buoyant density was 1-33 g/ml. The single stranded RNA was isolated as two species which(More)
Black beetle virus (BBV), one of a recently discovered class of viruses with a bipartite genome, multiplied readily in Schneider's line 1 of Drosophila cells. Virus yields, on the order of 100 mg per liter of culture, were unusually high and represented some 20% of the total cell protein within 3 days after infection. A derivative subline of these(More)
Some properties of a small RNA virus isolated from larvae of Heteronychus arator [Coleoptera: Scarabaeidae] are described. The virus develops in the cytoplasm of gut and fat body cells and is 3o nm in diameter. The sedimentation coefficient of virus was 137 S and the buoyant density was 1.33 g/ml. The single stranded R N A was isolated as two species which(More)
Nitrogen stress is a common strategy employed to stimulate lipid accumulation in microalgae, a biofuel feedstock of topical interest. Although widely investigated, the underlying mechanism of this strategy is still poorly understood. We examined the proteome response of lipid accumulation in the model diatom, Phaeodactylum tricornutum (CCAP 1055/1), at an(More)
Antibodies to cricket paralysis virus were demonstrated in sera from a pig, a horse, and numerous cattle in New Zealand. The reactions in immunodiffusion tests were variable, but significant and consistent reactions were obtained with these sere in virus neutralization assays using Drosophila cells. The sedimentation coefficient of the antibodies was 19S,(More)