Showing papers on "Chlorococcum published in 2011"

Preliminary phycochemical analysis and in vitro antibacterial screening of green micro algae, Desmococcus Olivaceous, Chlorococcum humicola and Chlorella vulgaris

Abstract: Antibacterial activity of the Acetone, methanolic, ethanolic and DMSO extract of dried green microalgae Desmococcus olivaceous, chlorococcum humicola and chlorella vulgaris was assayed against five gram-ve (Klebsiella pneumoniae, Pseudomonas, Vibriocholerae, Streptococccus pyrogenes and Escherichia coli) and one gram +ve (Staphylococcus aureus) bacteria under culture conditions, using the agar disc diffusion technique. Incubation of the Mullar-Hinton agar plates for 24hrs. at 30°C, supplemented with the six test bacteria along with 50ml of acetone, methanolic, ethanolic and DMSO (Dimethyl sulphoxide) extract revealed inhibitory effect. The highest inhibition zone (25 mm& 21 mm ) was observed in acetone extract of Chlorococcum sp against gram +ve bacteria (Staphylococcus aureus) & gram -ve bacteria ( Escherichia coli). Preliminary phycochemical analysis was also performed on the dried algal sample by employing chemical methods and thin layer chromatography technique to assay the bioactive compounds which revealed the presence of seven principle bioactive compounds viz., phenolic, tannin, flavanoids, saponins, terpenes, carbohydrates & cardiac glycosides.

Influence of organic waste and inorganic nitrogen source on biomass productivity of Scenedesmus and Chlorococcum sp.

Abstract: Algae gaining the more attention in the recent years in order to supplement the futuristic demand of fuel requirement because of its unique feature like high productivity, short duration and higher fatty acids content. However algal culturing for large-scale production is limited due to many technical and engineering challenges. One of the main constraints for large-scale biomass production is the nonavailability of cost effective and affordable growth medium for open pond condition. In order to overcome this lacuna, the present study was carried out to find out the suitable cost effective growth medium using locally available resources. Farm Yard Manure an easily available organic waste yet, rich in nutrients and used for agriculture over the generations. FYM coupled with inorganic nitrogen source like urea was found to be better alternative to the synthetic growth medium, which may make wider acceptability at farmers’ field for large-scale algal mass production. The present study reveals that FYM extract of 50% supplemented with 0.1% Urea was performing better for algal biomass growth in outdoor open pond condition. Copyright © 2011 International Energy and Environment Foundation All rights reserved.

Unusual habitat of algae

Abstract: In a recent survey of algal diversity from different habitat of Eastern India, 3 algal genera commonly occurring in aquatic habitat and in free living condition, viz. Chlorococcum and Cladophora of Chlorophyceae and Euglena of Euglenophyceae were recorded away from their usual habitat. Chlorococcum was found in endozoic condition within slug (mollusc without shell), Euglena in endophytic condition within the leaf of the pteridophytic genus Selaginella of Eastern Himalaya region and Cladophora was found to grow in terrestrial condition near the bank of the river Matla of the marine region of Sundarban mangrove forest of India.

Extracts of microalgae and their application

Abstract: Suggested are new extracts of microalgae selected from the group consisting of (i) Monodus sp. (ii) Thalassiosira sp. (iii) Chaetoceros sp. and/or (iv) Chlorococcum sp. obtainable by treating said microalgae with a solvent selected from the group consisting of C 1 -C 4 aliphatic alcohols, ethyl acetate, water or their mixtures, removing the dissolved extracts from the residues and recovering the pure extracts from the solvent. The extracts show excellent properties particularly in modulating the metabolism of human skin and hair follicles.

Isolation, identification, morphological studies and lipid granules staining (Nile red) of different micro-algae for biodiesel production from fresh water and saline water.

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.

Electrocoagulation of marine microalgae

Abstract: This paper focuses on the operation of a batch electrolytic cell for the electrocoagulation and separation of marine microalgae from the growth media. This is a promising technique for the separation of cellular and colloidal material from saline water. Metal ions are introduced into the solution by electrolysis using a sacrificial anode. This is advantageous compared with traditional flocculation as flocculants such as alum introduce anionic species and polymer flocculants are often less effective in saline conditions. The cations introduced by electrolysis are adsorbed onto the suspended material allowing coagulation to occur. Simultaneously, hydrogen bubbles produced at the cathode lift the solid flocs to the surface. In this study the separation efficiency defined by the removal ratio of microalgae has been quantified as a function of the electrolytic cell parameters: voltage, current, and time. Two marine microalgae species Chlorococcum sp. and Tetraselmis sp. and two sacrificial electrodes, aluminium and ferritic stainless steel have been tested. The results indicate that the aluminium anode yields the most rapid algae removal with respect to electrolysis time. However the removal was limited to a maximum of 89.7 % at 5 V after 600 s. The recovery with the use of the stainless steel anode at the same voltage and time was somewhat higher at 93.3 %. The difference in the peak performance is attributed to the impeded coagulation ability of aluminium ions as an acidic pH threshold is approached. In general, Tetraselmis sp. exhibited consistently higher removal percentages than Chlorococcum sp.

Cu2+ uptake by Chlorococcum hemicolum - A Xeric Chlorophycean Alga

Abstract: Bioremediation of copper by xeric chlorophycean bioremediator, Chlorococcum hemicolum was investigated. The growth rates at various concentrations of Cu2+ were assessed in terms of protein level and 8 mg L-1 (37.67 % level in growth kinetics) is the tolerance limit. Absorption/adsorption kinetics was estimated after 240 hrs of Cu2+ treatments. Absorptions were higher than adsorption with maximum accumulation factor (AF) of 1.40. The Cu2+ concentration and absorption were linearly related (r = 0.99; p>0.01). Other biochemical parameters like total sugar, chlorophyll and carotenoids were also quantified to correlate the state of metabolism and these exhibited reduction due to heavy metal stress.

Extracts of microalgae and their application

Abstract: Suggested are new extracts of microalgae selected from the group consisting of (i) Monodus sp. (ii) Thalassiosira sp. (iii) Chaetoceros sp. and/or (iv) Chlorococcum sp. obtainable by treating said microalgae with a solvent selected from the group consisting of C1-C4 aliphatic alcohols, ethyl acetate, water or their mixtures, removing the dissolved extracts from the residues and recovering the pure extracts from the solvent. The extracts show excellent properties particularly in modulating the metabolism of human skin and hair follicles.