Marine microalgae have been used for a long time as food for humans, such as Arthrospira (formerly, Spirulina), and for animals in aquaculture. The biomass of these microalgae and the compounds they produce have been shown to possess several biological applications with numerous health benefits. The present review puts up-to-date the research on the biological activities and applications of polysaccharides, active biocompounds synthesized by marine unicellular algae, which are, most of the times, released into the surrounding medium (exo- or extracellular polysaccharides, EPS). It goes through the most studied activities of sulphated polysaccharides (sPS) or their derivatives, but also highlights lesser known applications as hypolipidaemic or hypoglycaemic, or as biolubricant agents and drag-reducers. Therefore, the great potentials of sPS from marine microalgae to be used as nutraceuticals, therapeutic agents, cosmetics, or in other areas, such as engineering, are approached in this review.
Russia] For the past four years, a team of scientists from the Far Eastern Federal University (FEFU), Russian Academic Excellence Project participant, and an international group of toxicologists have been studying the effects of carbon and silicon nanoparticles on marine organisms (Environmental Research, "Effects of carbon and silicon nanotubes and carbon nanofibers on marine microalgae Heterosigma akashiwo").. "We already have data on the impact that these elements-which are used in plastic composites and products-have on terrestrial flora and fauna, but there has been no systematic study of the potential damage that nanoparticles can cause to marine life," said FEFUs Provost for Research, professor of the Russian Academy of Sciences, and Doctor of Biology Kirill Golokhvast. "Meanwhile, up to 80% of the plastic and composites on the planet end up in the World Ocean, where they decompose over a period of several hundred years.". Using carbon and silicate nanocomponents significantly improves ...
Microalgae are capable of producing sustainable bioproducts and biofuels by using carbon dioxide or other carbon substances in various cultivation modes. It is of great significance to exploit microalgae for the economical viability of biofuels and the revenues from high-value bioproducts. However, the industrial performance of microalgae is still challenged with potential conflict between cost of microalgae cultivation and revenues from them, which is mainly ascribed to the lack of comprehensive understanding of carbon metabolism and energy conversion. In this review, we provide an overview of the recent advances in carbon and energy fluxes of light-dependent reaction, Calvin-Benson-Bassham cycle, tricarboxylic acid cycle, glycolysis pathway and processes of product biosynthesis in microalgae, with focus on the increased photosynthetic and carbon efficiencies. Recent strategies for the enhanced production of bioproducts and biofuels from microalgae are discussed in detail. Approaches to alter microbial
Microalgae are capable of producing sustainable bioproducts and biofuels by using carbon dioxide or other carbon substances in various cultivation modes. It is of great significance to exploit microalgae for the economical viability of biofuels and the revenues from high-value bioproducts. However, the industrial performance of microalgae is still challenged with potential conflict between cost of microalgae cultivation and revenues from them, which is mainly ascribed to the lack of comprehensive understanding of carbon metabolism and energy conversion. In this review, we provide an overview of the recent advances in carbon and energy fluxes of light-dependent reaction, Calvin-Benson-Bassham cycle, tricarboxylic acid cycle, glycolysis pathway and processes of product biosynthesis in microalgae, with focus on the increased photosynthetic and carbon efficiencies. Recent strategies for the enhanced production of bioproducts and biofuels from microalgae are discussed in detail. Approaches to alter microbial
0025] Referring to FIG. 2, a pretreatment process flow diagram for extracting lipids from microalgae in accordance with an exemplary embodiment is depicted. In this exemplary embodiment, the aliphatic alcohol is left in contact with the microalgae for at least 15 minutes to allow for cellular membrane penetration. The contact time may be extended to as long as 4 hours in certain cases to maximize lipid liberation from the microalgae 205. Variations in contact time may be necessary due to environmental conditions and/or types of microalgae undergoing pretreatment. Several different aliphatic alcohols may be used to liberate lipids from the microalgae including methanol, ethanol, propanol and butanol 210. Empirically, 2-propanol, has been shown to be superior in the liberation of lipids from the microalgae. A study was conducted by the inventors which evaluated the effectiveness of various aliphatic alcohols for liberation of lipids from microalgae. The study, entitled "Extraction and ...
Microalgal lipids have drawn great attention as a promising sustainable resource for biodiesel or food supplement production. The development of high-performance strains of microalgae by metabolic engineering is invaluable for increasing the quantity or quality of desired lipids. The synthesis routes of lipids used as biodiesel in microalgae are based on fatty acid synthase (FAS) and triacylglycerols (TAG) biosynthesis pathway. Polyunsaturated fatty acids (PUFAs), including ω-6 and ω-3 fatty acids, are essential nutrients for humans. Notably, microalgae possess two distinct pathways for polyunsaturated fatty acids (PUFAs) biosynthesis, including the desaturase/elongase pathway and the polyketide synthase (PKS) pathway. Thus, it is necessary to identify which biosynthetic pathways are responsible for PUFA synthesis in particular microalgae species. In recent years, various key enzymes and functional domains involved in fatty acid and TAG biosynthesis pathway were identified and potentially ...
Biodiesel or ethanol derived from lipids or starch produced by microalgae may overcome many of the sustainability challenges previously ascribed to petroleum-based fuels and first generation plant-based biofuels. The paucity of microalgae genome sequences, however, limits gene-based biofuel feedstock optimization studies. Here we describe the sequencing and de novo transcriptome assembly for the non-model microalgae species, Dunaliella tertiolecta, and identify pathways and genes of importance related to biofuel production. Next generation DNA pyrosequencing technology applied to D. tertiolecta transcripts produced 1,363,336 high quality reads with an average length of 400 bases. Following quality and size trimming, ~ 45% of the high quality reads were assembled into 33,307 isotigs with a 31-fold coverage and 376,482 singletons. Assembled sequences and singletons were subjected to BLAST similarity searches and annotated with Gene Ontology (GO) and Kyoto Encyclopedia of Genes and Genomes (KEGG) orthology
The main source of n-3 long-chain polyunsaturated fatty acids (LC-PUFA) in human nutrition is currently seafood, especially oily fish. Nonetheless, due to cultural or individual preferences, convenience, geographic location, or awareness of risks associated to fatty fish consumption, the intake of fatty fish is far from supplying the recommended dietary levels. The end result observed in most western countries is not only a low supply of n-3 LC-PUFA, but also an unbalance towards the intake of n-6 fatty acids, resulting mostly from the consumption of vegetable oils. Awareness of the benefits of LC-PUFA in human health has led to the use of fish oils as food supplements. However, there is a need to explore alternatives sources of LC-PUFA, especially those of microbial origin. Microalgae species with potential to accumulate lipids in high amounts and to present elevated levels of n-3 LC-PUFA are known in marine phytoplankton. This review focuses on sources of n-3 LC-PUFA, namely eicosapentaenoic ...
Microalgae or microscopic algae grow in either marine or freshwater systems. They are primary producers in the oceans that convert water and carbon dioxide to biomass and oxygen in the presence of sunlight. The oldest documented use of microalgae was 2000 years ago, when the Chinese used the cyanobacteria Nostoc as a food source during a famine. Another type of microalgae, the cyanobacteria Arthrospira (Spirulina), was a common food source among populations in Chad and Aztecs in Mexico as far back as the 16th century. Today cultured microalgae is used as direct feed for humans and land-based farm animals, and as feed for cultured aquatic species such as molluscs and the early larval stages of fish and crustaceans. It is a potential candidate for biofuel production. Microalgae can grow 20 or 30 times faster than traditional food crops, and has no need to compete for arable land. Since microalgal production is central to so many commercial applications, there is a need for production techniques ...
0001] The present invention relates to an axenic inoculation system for microalgae using a triiodide resin (TR) tube of a triiodide resin, and a method for culturing an axenic culture. More particularly, a TR tube is fabricated using a triiodide resin and a method for culturing an axenic culture. More particularly, a TR tube is fabricated using a triiodide resin and attached on an upper portion of a photobioreactor (PBR), and used for passing a culture solution containing microalgae, pure liquid and air through the TR tube. The present invention relates to an axenic inoculation system for microalgae using the TR tube which principally prevents contamination with bacteria possibly occurred due to temporary exposure to external environments at the time of inoculation of microalgae during culture, while selectively passing air, the culture and microalgae only through a closed photobioreactor (PBR). Accordingly, the present invention relates a configuration of a selective channel for selectively ...
To achieve high productivity of different components, or to make microalgae more suitable for production at an industrial scale, improving of physiological properties of microalgae is often required. To this end we are focusing on microalgae strain development via classical selection methods or by genetic modification.
...Microalgae are single-cell plants that comprise natures smallest and ...The Ben-Gurion team created a physics model that explains some of the ...These bioreactors produce biomass yields an order-of-magnitude greater......,Bioreactor,redesign,dramatically,improves,yield,biological,advanced biology technology,biology laboratory technology,biology device technology,latest biology technology
Incredible Aquarium Easy Reefs Easybooster 1.8ml x 28 dose [EDB28] - Easybooster is a suspension in gel form comprised of marine microalgae and marine minerals that can be preserved at room temperature for over 18 months. Phytoplankton or marine microalgae are microscopic vegetable cells that can be found dispersed in the sea. Phytoplankton is at the base of the food chain in
Biodiesel production from microalgae is being widely developed at different scales as a potential source of renewable energy with both economic and environmental benefits. Although many microalgae species have been identified and isolated for lipid production, there is currently no consensus as to which species provide the highest productivity. Different species are expected to function best at different aquatic, geographical and climatic conditions. In addition, other value-added products are now being considered for commercial production which necessitates the selection of the most capable algae strains suitable for multiple-product algae biorefineries. Here we present and review practical issues of several simple and robust methods for microalgae isolation and selection for traits that maybe most relevant for commercial biodiesel production. A combination of conventional and modern techniques is likely to be the most efficient route from isolation to large-scale cultivation.
Microalgae have been largely commercialized as food and feed additives, and their potential as a source of high-added value compounds is well known. Yet, only a few species of microalgae have been genetically transformed with efficiency. A better understanding of the mechanisms that control the regulation of gene expression in eukaryotes is therefore needed. In this book a group of outstanding researchers working on different areas of microalgae biotechnology offer a global vision of the genetic manipulation of microalgae and their applications ...
TY - JOUR. T1 - Integrated utilization of microalgae cultured in aquaculture wastewater. T2 - wastewater treatment and production of valuable fatty acids and tocopherols. AU - Tossavainen, Marika. AU - Lahti, Katariina. AU - Edelmann, Minnamari. AU - Eskola, Reetta. AU - Lampi, Anna-Maija. AU - Piironen, Vieno. AU - Korvonen, Pasi. AU - Ojala, Anne. AU - Romantschuk, Martin. PY - 2019/6. Y1 - 2019/6. KW - Euglena gracilis. KW - Selenastrum. KW - PUFA. KW - RAS. KW - Wastewater. KW - Feed. KW - NANNOCHLOROPSIS-OCULATA EUSTIGMATOPHYCEAE. KW - SALMON SALMO-SALAR. KW - VITAMIN-E. KW - MARINE MICROALGAE. KW - EUGLENA-GRACILIS. KW - ALGAL BIOMASS. KW - CHLORELLA SP. KW - FRESH-WATER. KW - GROWTH. KW - BIOFUEL. KW - 1172 Environmental sciences. U2 - 10.1007/s10811-018-1689-6. DO - 10.1007/s10811-018-1689-6. M3 - Article. VL - 31. SP - 1753. EP - 1763. JO - Journal of Applied Phycology. JF - Journal of Applied Phycology. SN - 0921-8971. IS - 3. ER - ...
ABS = Access & Benefit Sharing according to the Nagoya Protocol to the Convention for Biological Diversity (find out more here ...
ABS = Access & Benefit Sharing according to the Nagoya Protocol to the Convention for Biological Diversity (find out more here ...
All living cells produce reactive oxygen species (ROS) as a byproduct of metabolism. ROS are reduced oxygen intermediates that include the superoxide radical (O2−) and the hydroxyl radical (OH•), as well as the non-radical species hydrogen peroxide (H2O2). These ROS are important in the normal functioning of cells, playing a role in signal transduction and the expression of transcription factors. However, when present in excess, ROS can cause damage to proteins, lipids and DNA by reacting with these biomolecules to modify or destroy their intended function. As an example, the occurrence of ROS have been linked to the aging process in humans, as well as several other diseases including Alzheimers, rheumatoid arthritis, Parkinsons, and some cancers. Their potential for damage also makes reactive oxygen species useful in direct protection from invading pathogens, as a defense response to physical injury, and as a mechanism for stopping the spread of bacteria and viruses by inducing programmed ...
Microalgae have recently drawn attention as a potential resource for biofuels generation. In the short term, anaerobic digestion seems the most viable downstream process. Still, microalgae cell wall restrains the hydrolysis, hampering the methane production potential. This work aimed at improving the anaerobic biodegradability of microalgae through different pretreatment methods: microwave, low temperature and high temperature. For the microwave pretreatment, the specific energy was the main parameter affecting biomass solubilisation, increasing up to 800 % compared to untreated biomass. For the low and high temperature pretreatments, temperature was the most important factor, increasing biomass solubilisation up to 1190 and 2140 % in each case. BMP tests showed an increased methane yield after all pretreatments (40-80 %), with the highest results for the microwave pretreatment. In semi-continuous reactors operated at 15 days HRT, the methane production was increased by 30 and 33 % after ...
The crisis of energy producing molecules (fuels) is expected to increase in future, which is currently produced from crude mineral oil. Biodiesel is most reliable, non-toxic, biocompatible liquid fuel that can replace the existing unsustainable sources of energy. Among all the known sources, microalgae display high potential for the production of biodiesel owing to their numerous benefits like higher biomass productivities than plants, no agricultural land requirement, cultivation in waste water and accumulation of 20-50% triacylglycerols. Microalgae biomass and lipid content plays an important role in commercial production of biodiesel. The present work was carried out to develop an axenic culture of a potential microalga Chlorella sp. for high biomass and enhanced lipid accumulation. The important growth parameters like pH, light colour, light intensity and photoperiod were studied for better production of Chlorella biomass. The effect of salinity on cell growth was also studied and compared with
Sustainable and clean fuels are in demand due to the perceived negative effects on health and environment with current use of fossil fuels. Lipids from microalgae offer a potential approach to obtain sustainable biofuels. In this study a two step process was adopted: investigation of culture conditions to find optimal points for lipid productivity and cellulose content, followed by an investigation of microalgae disruption for lipid recovery. In the first phase of the research the effect of culture conditions on Chlorella vulgaris biomass concentration and the ratio of lipid productivity/cellulose content were studied. Response surface methodology was applied to optimize the culture conditions. The response model for biomass concentration led to a predicted maximum of 1.12 g dw L-1 when carbon dioxide and sodium nitrate concentrations were 2.33% vv-1 and 5.77 mM, respectively. For lipid productivity/cellulose content ratio the maximum predicted value was 0.46 (mg lipid L-1d-1)(mg cellulose mg biomass-1)
The potential of Nannochloropsis sp. microalga to biodiesel production was assessed. The work deals with the optimization of the cell disruption, a required step when the..
Biofuels are the most awaited products of scientific research. The fossil fuels are being exhausted, and pollution is increasing globally. Algal biofuels are one of the promising options. They are wonderful tiny factories that yield a variety of substances that have the property to act as sources of ecofriendly fuels. More attention has been focused on microalgae-derived biomass for generating diverse renewable energy sources. The distinct features that microalgae possess include high biomass yield, abundant oil content, no requirement for land and easy cultivation in wastewaters coupled with carbon dioxide mitigation. Microalgae are tiny reservoirs of a plethora of biofuels. The diverse algal biofuels range from biodiesel, straight vegetable oil (SVO), lipids, ethanol and hydrogen. Biofuels are the need of today, and researchers around the globe are exploring the options for biological fuel production.
The invention relates to Algologie and Microbiology, and in particular to methods of allocation bacteriologically pure cultures of marine blue-green microalgae.. Currently, much attention is paid to the development of test systems for the evaluation of toxicity of the components of the marine ecosystems of water bodies, which requires the isolation of pure cultures of aquatic organisms, in particular microalgae. The standard procedure consists of isolating and growing algological pure cultures of algae, which then selects the most promising for biological testing. However, cultures of microalgae always be contaminated by bacterial microflora, spores and mycelium of fungi, which prevents further research, distorts the results. Purification from bacteria is a very time consuming process, because between algae and bacteria are dense biocenotic relationships. The mucous membranes of the algae serve as food source and shelter for microorganisms. Such a close relationship determines the difficulty of ...
VARGAS, Gustavo; DONOSO-BRAVO, Andrés; VERGARA, Christian e RUIZ-FILIPPI, Gonzalo. Assessment of microalgae and nitrifiers activity in a consortium in a continuous operation and the effect of oxygen depletion. Electron. J. Biotechnol. [online]. 2016, vol.19, n.5, pp.63-68. ISSN 0717-3458. http://dx.doi.org/10.1016/j.ejbt.2016.08.002.. Background: Industrial wastewaters with a high content of nitrogen are a relevant environmental problem. Currently, treatments to remove nitrogen are not efficient, so is necessary to develop alternative methods. The objective of this study is to investigate a consortium of microalgae - nitrifying, that due to the symbiosis between them could be an interesting alternative. Results: In this study, it was possible to obtain a consortium of nitrifying bacteria (NB) and microalgae (MA) capable of operating with low requirements of dissolved oxygen, using aerobic sludge from wastewater treatment plants. During the operation, this consortium presents removal percentages ...
[119 Pages Report] Check for Discount on Global (North America, Europe and Asia-Pacific, South America, Middle East and Africa) Microalgae Market 2017 Forecast to 2022 report by Global Info Research. Microphytes or microalgae are microscopic algae, typically found in freshwater...
Utricularia species capture small prey in traps. The prey spectrum of aquatic Utricularia species includes a large variety of organisms (e.g. copepods, cladocerans, crustacea, rotifers, algae). This study focuses on selected attributes (species richness, density, biovolume, C and N contents) of microalgae captured inside the traps of aquatic Utricularia spp.. A total of 850 traps of four aquatic bladderwort species (Utricularia australis, U. foliosa, U. gibba and U. vulgaris) from tropical (Ivory Coast) and temperate (Canada, Germany) regions has been investigated concerning the algae captured. In total, 302 microalgal taxa have been identified with Bacillariophyceae, Chlorophyceae and Charophyceae being most species rich. The number of microalgae species captured was different among the Utricularia spp. It was relatively low inside the traps of U. gibba and U. foliosa from tropical Africa, with the greatest species diversity observed within the Charophyceae (Desmidiaceae). The highest ...
Photosynthetic microalgae hold promise as green cell factories for sustainable light-driven bio-production processes. These organisms can be cultivated with freely available sunlight energy and CO2 as a sole carbon source, making them ideal chassis for sustainable production processes. Microalgae are already natural sources of many interesting bio-products including carotenoids, lipids, and polysaccharides. However, expanding the range as well as value of the compounds produced by microalgae through genetic engineering can increase the economic competitiveness of light-driven algal production platforms. In comparison to bacteria or yeasts, genetic engineering of eukaryotic microalgae has lagged significantly behind due to characteristically low transgene expression levels. Work in our research group has focused on engineering increased and reliable levels of nuclear transgene expression in the fast growing, Chlorophyceaen microalga Chlamydomonas reinhardtii, with the aim of generating ...
The production of biofuels from microalgae is a promising and sustainable alternative. Its production is determined by the content of lipids and carbohydrates, which is different for each microalgae species and is affected by environmental factors, being lighting one of the principal determining their biochemical composition. The colour temperature (electromagnetic radiation and light spectrum) is a determining factor for the production of lipids and carbohydrates in microalgae. The aim of this assay was to evaluate the effect of three colour temperatures (6500, 10,000 and 20,000 °K) on the biomass (cel mL−1), biomass production and productivity (g L−1 and g L−1 day−1), lipid and carbohydrate content (%), lipid and carbohydrate production and productivity (mg L−1 and mg L−1 day−1), composition and content of fatty acids (%) in two microalgae species: Dunaliella salina and Nannochloropsis oculata. The highest cell density was observed for N. oculata in stationary phase in the ...
Isolation of high neutral lipid-containing microalgae is key to the commercial success of microalgae-based biofuel production. The Nile red fluorescence method has been successfully applied to the determination of lipids in certain microalgae, but has been unsuccessful in many others, particularly those with thick, rigid cell walls that prevent the penetration of the fluorescence dye. The conventional "one sample at a time" method was also time-consuming. In this study, the solvent dimethyl sulfoxide (DMSO) was introduced to microalgal samples as the stain carrier at an elevated temperature. The cellular neutral lipids were determined and quantified using a 96-well plate on a fluorescence spectrophotometer with an excitation wavelength of 530 nm and an emission wavelength of 575 run. An optimized procedure yielded a high correlation coefficient (R-2 = 0.998) with the lipid standard triolein and repeated measurements of replicates. Application of the improved method to several green algal strains ...
Abstract. It has become more evident that many microalgae respond very differently than land plants to diverse stimuli. Therefore, we cannot reduce microalgae biology to what we have learned from land plants biology. However, we are still at the beginning of a comprehensive understanding of microalgae biology. Microalgae have been posited several times as prime candidates for the development of sustainable energy platforms, making thus the in-depth understanding of their biological features an important objective. Thus, the knowledge related to the basics of microalgae biology must be acquired and shared rapidly, fostering the development of potential applications. Microalgae biology has been studied for more than forty years now and more intensely since the 1970s, when genetics and molecular biology approaches were integrated into the research programs. Recently, studies on the molecular physiology of microalgae have provided evidences on the particularities of these organisms, mainly in model ...
Microalgae are prime targets for research on biofuels. Leading candidates as alternative sources of biodiesel, their culture has the unquestionable advantage, compared to oleaginous land plants, of not competing with cultivated land necessary for human food. Producing fuel from water, sunlight and carbon dioxide from the atmosphere appears as a miracle solution that has fostered numerous research programs since the 1970s. Chlorella is particularly interesting for the development of second-generation biodiesel thanks to its high lipid content (it only contains 30 % dry matter). Although several genomes of green algae (Chlorophyta) have already been sequenced (Chlamydomonas, Micromonas and Ostreococcus), Chlorella had not been analyzed until now, despite its economic role as long-established food supplement. The analysis of the Chlorella genome, coordinated by Guillaume Blanc, CNRS researcher, predicts 9,791 protein genes, a total comparable to that of its cousin Micromonas. This new genomic data ...
It was hypothesised that Nannochloropsis limnetica due to the specific chemical composition and fatty acids profile, may positively affect rumen fermentation. To confirm this hypothesis the batch culture experiment was conducted to evaluate N. limnetica supplemented at 0, 2, 4 and 6% of the...
It was hypothesised that Nannochloropsis limnetica due to the specific chemical composition and fatty acids profile, may positively affect rumen fermentation. To confirm this hypothesis the batch culture experiment was conducted to evaluate N. limnetica supplemented at 0, 2, 4 and 6% of the...
Discussion Long-term study. The objectives of this study were to determine the microalgal biomass and community composition in the Sundays Estuary. Results show a unique case where the chlorophyll a blooms in the estuary consist of multiple microalgal groups. High chlorophyll a concentrations (,20 μgℓ-1) in the shallow upper reaches of the Sundays Estuary have previously been found where nitrate concentrations were greater than 14 μM, water residence time was 6 - 7 tidal cycles and where there was marked salinity stratification (Hilmer and Bate, 1991; Adams and Bate, 1999; Scharler, 2000). Scharler (2000) recorded a bloom in the middle and upper reaches of the Sundays Estuary and recorded a mean chlorophyll biomass of 22 μgℓ-1 at nitrate concentrations of 33 μM in the upper reaches. Similarly, in the Great Fish Estuary consistent freshwater inflow carrying a high nutrient load supported high (,20 μgℓ-1) phytoplankton biomass (Allanson and Read, 1995). High (,20 μgℓ-1) chlorophyll a ...
Biotech Supplies China, Auto Controlled Microalgae Phototroph Bioreactor 10 31, Auto- controlled Microalgae phototroph bioreactor Technical parameters: 1, Volume of 6-20L 2, The main part of reactor i...
At Synthetic Genomics, were harnessing the power of algae to produce biofuels that recycle the atmospheres excess amounts of CO2. Microalgae are excellent at converting CO2 and sunlight into biomass, especially when compared to land-based crop plants like oil palm, sugar cane or corn. But there are some challenges that must be worked out before we can use microalgae to make fuel. In their natural form, microalgae, while having impressive productivity, are not economical due to the comparatively high costs of algal farm installations and costs of processing. Productivity and oil yields have to significantly increase before algal biofuels are scalable and cost competitive. Since algae mostly reproduce asexually, traditional plant optimization through cross-breeding is infeasible to impart the needed characteristics into the microalgae.. With advancements in genome sequencing, bioinformatics and precise gene editing technologies, improving algaes productivity is now becoming a reality. Synthetic ...
Microalgae are very promising organisms for the production of high-value compounds such as carotenoids. Nevertheless, their commercial use is so far hampered by the lack ..
The availability of only limited number of microalgae genome sequences hinders the efforts of optimization and metabolic engineering studies in biofuel production from microalgae. Here we describe a comprehensive sequencing, and de novo assembly of a non-model microalgae species, Dunaliella tertiolecta, transcriptome, and provide its pathway descriptions along with identified key genes of importance related to biofuel production. D. tertiolecta transcriptome was sequenced using 454 pyrosequencing technology with Titanium chemistry. Assembled sequences were subjected to BLAST similarity search against "nr" databases of National Center for Biotechnology Information (NCBI) and annotated with Gene Ontology (GO) and Kyoto Encyclopedia of Genes and Genomes (KEGG) orthology (KO) identifiers. These target-based analyses identified the majority of biosynthesis and catabolism of lipids and starch pathways in D. tertiolecta. The presented work describes the first de novo sequencing and analysis of a ...
Bio Extract use whole dried Dunaliella salina Marine Microalgae as Dunaliella Beta carotene is an excellent The macula sits in the center and allows you to see fine details and gives you central vision.. Benefit Eye Bright (Instant Eye Brightener) - 1.4g/0.05oz. Many people are looking for the best contact eye pain blurry vision floaters glaucoma uk solution for dry eyes. Beta carotene will help the skin fight away future aging. Doctors Best Astaxanthin Special Visit Manufacturers Website 1-5 black eyed free humps mp3 pea. What kind of vitamins should you take having MS? My doctor is B12 fish oil astaxanthin (Bioastin a red microalgae) Weeratunge and Vitamin B12 Foods And Fruits Scientfic Blindness Definition Color Perera acute glaucoma intraocular pressure conjunctivitis complications allergic Chemistry Central Journal Formulation of a fish feed for goldfish with natural astaxanthin extracted from shrimp waste W. All together the annual production of marine fish in Israel is over 3000 tons. ...
Despite being established as a sustainable feedstock for biofuel production with tremendous potential, the microalgae biofuel industry still struggles to make large-scale production economically viable. An overriding aspect in microalgae oil production is strain selection, as it affects nearly all stages of production. This chapter presents the key traits that microalgae should possess for successful lipid production, as well as suitable isolation and selection strategies. It highlights the various metabolic engineering methods that are currently available for the biological improvement of microalgae strains, comparing GM vs non-GM approaches.
In view of increasing commercial applications of metal oxide nanoparticles their toxicity assessment becomes important. Alumina (Al2O3) nanoparticles have wide range of applications in industrial as w
... is a mixture of zooplankton and marine microalgae designed for the specific nutrition of LPS corals. Available now at Swell UK.
Fatty acids (FA) were widely used as taxonomic indicators to distinguish algal groups by the presence, the abundance and the distribution of particular FA. This work aimed to compare between species FA composition of three green algae (Chlorophyceae: Chlorella vulgaris, Pseudokirchneriella subcapitata and Scenedesmus subspicatus) grown under comparable conditions, and to assess the suitability of using FA as indicators of taxonomic groups and environmental conditions for microalgae. Results showed that FA composition could not be used as a taxonomic feature of particular species because close species may present different FA composition due to their physiological state which in turn depends on environmental conditions. In this context, FA should be used as indicator at the class rather than the genus and/or species level. We propose two FA indices, the ω3/ω6 polyunsaturated FA ratio and an unsaturation index as indicators of physiological state and the growth phase of algae and a signs of ...
African Journal of Microbiology Research Vol. 3(13) pp December, 2009 Available online ISSN Academic Journals Review Microalgae: A promising
CiteWeb id: 20080000110. CiteWeb score: 3092. DOI: 10.1111/j.1365-313X.2008.03492.x. Summary Microalgae represent an exceptionally diverse but highly specialized group of micro-organisms adapted to various ecological habitats. Many microalgae have the ability to produce substantial amounts (e.g. 20-50% dry cell weight) of triacylglycerols (TAG) as a storage lipid under photo-oxidative stress or other adverse environmental conditions. Fatty acids, the building blocks for TAGs and all other cellular lipids, are synthesized in the chloroplast using a single set of enzymes, of which acetyl CoA carboxylase (ACCase) is key in regulating fatty acid synthesis rates. However, the expression of genes involved in fatty acid synthesis is poorly understood in microalgae. Synthesis and sequestration of TAG into cytosolic lipid bodies appear to be a protective mechanism by which algal cells cope with stress conditions, but little is known about regulation of TAG formation at the molecular and cellular level. ...
Procedures for determining the optimal pre-freezing protocol for cryo-preservation of microalgae are discussed. Three algal species were used (Chlorella vulgaris, Isochrysis galbana and Dunaliella salina) and cryo-stored using two different methods: the slow cooling and the fast freezing. In the slow cooling, each algae batch was treated with or without cryo-protectant (dimethyl sulfoxide: Me2SO 5% v/v). After 20 min at 4 degrees C, the midi-straws were filled and cooled slowly (1.5 degrees C min(-1)) to -140 degrees C, by a programmable freezer (Digitcool-IMV), before putting them directly into liquid nitrogen. Fast freezing was performed with 10% or 15% Me2SO prior to plunging into liquid nitrogen. The three algal species followed the same re-growth pattern as that of the controls. The post-thawed viability with Me2SO was good for all the selected algae (C. vulgaris > 95%, I. galbana and D. sauna > 70% of the control), applying the slow cooling. The post-thawed viability without Me2SO was 60% ...
A select set of microalgae are reported to be able to catalyse photobiological H(2) production from water. Based on the model organism Chlamydomonas reinhardtii, a method was developed for the screening of naturally occurring H(2)-producing microalgae. By purging algal cultures with N(2) in the dark and subsequent illumination, it is possible to rapidly induce photobiological H(2) evolution. Using NMR spectroscopy for metabolic profiling in C. reinhardtii, acetate, formate, and ethanol were found to be key compounds contributing to metabolic variance during the assay. This procedure can be used to test algal species existing as axenic or mixed cultures for their ability to produce H(2). Using this system, five algal isolates capable of H(2) production were identified in various aquatic systems. A phylogenetic tree was constructed using ribosomal sequence data of green unicellular algae to determine if there were taxonomic patterns of H(2) production. H(2)-producing algal species were seen to be ...
Article Digestion of wastewater pond microalgae and potential inhibition by alum and ammoniacal-N. Algae are produced in considerable quantities in oxidation ponds, and may negatively affect receiving waters when discharged at high concentration. Thu...