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Furthermore, some species present high lipid content that can be easily converted into biodiesel. Accordingly, this study aims to analyze the effect of light supply (one of the most important culture parameters) on lipid production of selected microalgae, <jats:italic>Chlorella vulgaris<\/jats:italic> and <jats:italic>Pseudokirchneriella subcapitata.<\/jats:italic>\n            <\/jats:p>\n          <\/jats:sec>\n          <jats:sec>\n            <jats:title>Methods<\/jats:title>\n            <jats:p>Both microalgal species were cultured under different light irradiance values (36, 72, 96, and 126 \u03bcE m<jats:sup>\u22122<\/jats:sup> s<jats:sup>\u22121<\/jats:sup>) and for each light irradiance value, three light\/dark ratios (10:14, 14:10, and 24:0) were tested. Lipid contents of both microalgae were then determined using a recently developed colorimetric method.<\/jats:p>\n          <\/jats:sec>\n          <jats:sec>\n            <jats:title>Results\/Conclusions<\/jats:title>\n            <jats:p>\n              <jats:italic>P. subcapitata<\/jats:italic> presented higher lipid productivity than <jats:italic>C. vulgaris<\/jats:italic>. High lipid concentration was achieved in microalgal cultures with higher light irradiance values. However, for 96 and 126 \u03bcE m<jats:sup>\u22122<\/jats:sup> s<jats:sup>\u22121<\/jats:sup>, lipid productions of both microalgae were not significantly higher than with 72 \u03bcE m<jats:sup>\u22122<\/jats:sup> s<jats:sup>\u22121<\/jats:sup>, which means that microalgal light saturation point may be achieved.<\/jats:p>\n          <\/jats:sec>","DOI":"10.1186\/2251-6832-4-14","type":"journal-article","created":{"date-parts":[[2013,4,3]],"date-time":"2013-04-03T12:14:25Z","timestamp":1364991265000},"update-policy":"https:\/\/doi.org\/10.1007\/springer_crossmark_policy","source":"Crossref","is-referenced-by-count":29,"title":["Lipid production of Chlorella vulgaris and Pseudokirchneriella subcapitata"],"prefix":"10.1007","volume":"4","author":[{"given":"Ana L","family":"Gon\u00e7alves","sequence":"first","affiliation":[]},{"given":"Jos\u00e9 CM","family":"Pires","sequence":"additional","affiliation":[]},{"given":"Manuel","family":"Sim\u00f5es","sequence":"additional","affiliation":[]}],"member":"297","published-online":{"date-parts":[[2013,4,3]]},"reference":[{"key":"48_CR1","doi-asserted-by":"publisher","first-page":"11","DOI":"10.1186\/2251-6832-3-11","volume":"3","author":"SO Oyedepo","year":"2012","unstructured":"Oyedepo SO: Efficient energy utilization as a tool for sustainable development in Nigeria. 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