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Chlorococcum

About: Chlorococcum is a research topic. Over the lifetime, 268 publications have been published within this topic receiving 7317 citations.


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Journal ArticleDOI
TL;DR: Polyphyletic nature of three genera of green microalgae, Chlorococcum, Deasonia, and Neospongiococcums, was confirmed and proposals on taxonomic revision are based on morphological similarity, 18S rRNA distances, presence of compensatory base changes in ITS2 conserved regions, differences in the secondary structure of the spacer, and differences of the helix III conserved motif.
Abstract: Polyphyletic nature of three genera of green microalgae, Chlorococcum, Deasonia, and Neospongiococcum, was confirmed. Some Chlorococcum species, together with the type species C. infusionum, formed a true clade Chlorococcum within the macroclade Moewusinia. Its members were characterized by extremely long ITS2 regions with unusual secondary structure. Other species were found to belong to the Stephanosphaerinia macroclade, and should be reclassified accordingly. The research of authentic strains resulted in revised and enhanced morphological descriptions of N. gelatinosum, C. diplobionticum, C. isabeliense, and C. sphacosum. Proposals on taxonomic revision are based on morphological similarity, 18S rRNA distances, presence of compensatory base changes in ITS2 conserved regions, differences in the secondary structure of the spacer, and differences of the helix III conserved motif.

7 citations

Journal ArticleDOI
01 Jan 2018
TL;DR: In this article, a preliminary study aimed to exploit the biomass of microalgae Chlorella vulgaris; Scenedesmus obliquus; and Chlorococcum sp. in the form of a mixed culture as raw material of alternative fuels.
Abstract: This preliminary study aims to exploit the biomass of microalgae Chlorella vulgaris; Scenedesmus obliquus; and Chlorococcum sp. in the form of a mixed culture as raw material of alternative fuels. Microalgae were cultivated in the artificial growth medium of PHM (Provasoli Haematococcus Media) for 9 days to reach the exponential phase. Hydrolysis was carried out at a temperature variation of (oC) 25; 80; 100; 120; 140; 160 within 30 minutes by adding hydrochloric acid. Biomass fermentation by adding 50% (v/v) Saccharomyces cerevisiae for 5 day to produce alcohol compounds. The last stage is separation of the alcohol compounds from another compounds by distillation. The result showed that carbohydrate levels with color change indicator in luff schoorl solution at hydrolysis and fermentation stages severely were 12.20 mg/L. Carbohydrate levels in fermentation stage produced 17% (v/v) alcohol compounds while in the distillation stage, 98% (v/v) alcohol will be separated into intermediate compounds such as linoleic acid and methyl alcohol as a characteristic of bioethanol. At 80oC of hydrolysis temperature, 58% bioethanol was produced. Further research is needed, since the preliminary study proves the mixed culture of microalgae is potentially to be utilized in producing bioethanol.

7 citations

Journal ArticleDOI
TL;DR: In this article, the characteristics of 12 regional species of microalgae grown under controlled cultivation conditions (temperature = 24 ± 1 oC, illumination 150 µmol photons m-2 s-1, photoperiod of 12 h) in terms of their nutritional quality and lipid profiles were evaluated.
Abstract: There is an increasing demand for bioprospection focusing on microalgae isolated from the northeastern region of Brazil with potential importance for food industries. To attend that need, we evaluated the characteristics of 12 regional species of microalgae grown under controlled cultivation conditions (temperature = 24 ± 1 oC, illumination 150 µmol photons m-2 s-1, photoperiod of 12 h) in terms of their nutritional quality and lipid profiles. Significant differences in growth characteristics and chemical compositions were observed among the species investigated. High carbohydrate contents (> 25 g 100 g-1) were recorded in various strains of Chlorococcum and the marine microalga Amphidinium carterae; high protein contents (> 35 g 100 g-1) were observed in Scenedesmus acuminatus and Pediastrum tetras; and high lipid contents (> 25 g 100 g-1) in A. carterae and some strains of Chlorococcum sp. (cf. hypnosporum). Chlamydomonas sp. demonstrated the greatest production of carotenoids (64.92 mg g-1), chlorophyll-a (234.74 mg g-1), and chlorophyll-b (59.34 mg g-1). The lipid profiles of Chlorella cf. minutissima, four strains of Chlorococcum sp. (cf. hypnosporum), P. tetras, Planktothrix isothrix, and S. acuminatus indicated the presence of palmitic, oleic (ω-9), linoleic (ω-6) and α-linolenic (ω-3) acids, with more than 50% omegas in the total composition of their fatty acids. In terms of chemical nutrients, the microalgae cited were found to be potential sources of omegas, carotenoids, and chlorophylls that could be used in food industries.

7 citations

Journal ArticleDOI
TL;DR: The results suggest the possibility of cultivating biodiesel producing microalgae in industrial wash water effluents and Monoraphidium contortum showed the highest growth capacity and had the highest fatty acid content.
Abstract: Biodiesel wash water is a contaminating industrial effluent that must be treated prior to disposal. The use of this effluent as a low-cost alternative cultivation medium for microalgae could represent a viable supplementary treatment. We cultivated 11 microalgae species with potential use for biodiesel production to assess their growth capacities in biodiesel industrial washing waters. Only Monoraphidium contortum, Ankistrodesmus sp., Chlorococcum sp., and one unidentified Chlorophyceae species grew effectively in that effluent. M. contortum showed the highest growth capacity and had the second highest fatty acid content (267.9 mg g-1 of DW), predominantly producing palmitic (20.9%), 7,10,13-hexadecatrienoic (14%), oleic (16.2%), linoleic (10.5%), and linolenic acids (23.2%). In the second phase of the experiment, the microalgae were cultivated in biodiesel wash water at 75% of its initial concentration as well as in WC (control) medium. After 21 days of cultivation, 25.8 and 7.2% of the effluent nitrate and phosphate were removed, respectively, and the chemical oxygen demand was diminished by 31.2%. These results suggest the possibility of cultivating biodiesel producing microalgae in industrial wash water effluents.

6 citations

Journal Article
TL;DR: Algae samples were collected from temple tanks, saline water in Chennai, Mahapaliburam and Kovallam to surveyed the population, identification, morphological, and examined the Nile red method with microalgae genus of various classes.
Abstract: In the present study, the algal samples were collected from temple tanks, saline water in Chennai, Mahapaliburam and Kovallam. Collections were carried out during the month of September 2010 and February 2011. Samples were studied in the laboratory and identified. In their surveyed the population, identification, morphological, and examined the Nile red method with microalgae genus of various classes. Various physical and chemical treatments were applied to the existing Nile red method to improve the effectiveness and efficiency. The following algae were present Chlorella vulgaris, Nannnochloropsis, Dunaliella tertiolecta, Tetraselmis suecica, Chlorococcum humicolo, Scenedesmus acuminatus, Amphora coffeaformis, and Nitzschia longissima . Algae are described with photographs.

6 citations


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Performance
Metrics
No. of papers in the topic in previous years
YearPapers
20221
202121
202013
201923
201812
201714