Two acidophilic algae, identified as strains of Chlorella protothecoides var. acidicola and Euglena mutabilis, were isolated in pure culture from abandoned copper mines in Spain and Wales and grown in pH- and temperature-controlled bioreactors. The Chlorella isolate grew optimally at pH 2.5 and 30°C, with a corresponding culture doubling time of 9 h. The isolates displayed similar tolerance (10...

Paramecium bursaria chlorella virus (PBCV-1) is the prototype of a family of large, icosahedral, plaque-forming, double-stranded-DNA-containing viruses that replicate in certain unicellular, eukaryotic chlorella-like green algae. DNA sequence analysis of its 330, 742-bp genome leads to the prediction that this phycodnavirus has 376 protein-encoding genes and 10 transfer RNA genes. The predicted...

Brassinosteroids play a significant role in the amelioration of various abiotic and biotic stresses. In order to elaborate their roles in plants subjected to heavy metals stress, Chlorella vulgaris cultures treated with 10(-8) M brassinolide (BL) were exposed to 10(-6)-10(-4) M heavy metals (cadmium, lead and copper) application. Under heavy metals stress, the growth and chemical composition (c...

The overall internal pH of the acid-tolerant green alga, Chlorella saccharophila, was determined in the light and in the dark by the distribution of 5,5-dimethyl-2-[(14)C]oxazolidine-2,4-dione ([(14)C]DMO) or [(14)C]benzoic acid ([(14)C]BA) between the cells and the surrounding medium. [(14)C]DMO was used at external pH of 5.0 to 7.5 while [(14)C]BA was used in the range pH 3.0 to pH 5.5. Neith...

Ozone exposure has been shown to increase the loss of K from Chlorella cells due to an increase in passive permeability and a depolarization of membrane potential. One factor which likely influences or can be influenced by these changes is the energy state of the cell. To study this relationship, various indicators of cell energy status were examined in the presence and absence of O(3).The acti...

with increasing world populations, production of cost-effective and proper nourishment sources that can rapidly produce large amounts of nutritional value are needed. microalgae are publicly used as nutrient supplement. in this research a screening of endemic potent microalgae was carried out. chlorella , scenedesmus and spirulina sp. were isolated and purified and cultivated in liquid proper m...

in order to evaluate the effects of chlorella on broiler performance and immune system, an experimentwas performed by using 80 ross 308 male broiler chicks. the experiment was accomplished incompletely randomized design including 5 treatments with 4 replication and 4 observations in eachreplicate. the basal diet was based on corn-soybean meal (control) and without any additives. agraded level o...

The fine structure of Cyanidium caldarium, as seen in thin sections of KMnO4-fixed cells examined with the electron microscope, is described. This organism, whose taxonomic position among algae is undetermined, contains a single well defined chloroplast, a nucleus, and mitochondria. Studies, with the electron microscope, of Chlorella pyrenoidosa and Nostoc are also reported. Structural differen...