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https://www.readbyqxmd.com/read/28497178/optimization-of-production-of-c-phycocyanin-and-extracellular-polymeric-substances-by-arthrospira-sp
#1
Monchai Dejsungkranont, Yusuf Chisti, Sarote Sirisansaneeyakul
The key factors influencing the production of C-phycocyanin (C-PC) and extracellular polymeric substances (EPS) by photoautotrophic culture of Arthrospira sp. were optimized using Taguchi method. Six factors were varied at either three or two levels as follows: light intensity at three levels; three initial culture pHs; two species of Arthrospira; three concentrations of Zarrouk's medium; three rates of aeration of the culture with air mixed with 2% v/v carbon dioxide; and two incubation temperatures. All cultures ran for 14 days...
May 11, 2017: Bioprocess and Biosystems Engineering
https://www.readbyqxmd.com/read/28441036/application-of-arthrospira-spirulina-platensis-biomass-for-silver-removal-from-aqueous-solutions
#2
Inga Zinicovscaia, Liliana Cepoi, Tatiana Chiriac, Tatiana Mitina, Dmitrii Grozdov, Nikita Yushin, Otilia Culicov
The cyanobacterium Arthrospira (Spirulina) platensis was used to study the process of silver biosorption. Effects of various parameters such as contact time, dosage of biosorbent, initial pH, temperature, and initial concentration of Ag(I) were investigated for a batch adsorption system. The optimal biosorption conditions were determined as pH 5.0, biosorbent dosage of 0.4 g, and initial silver concentration of 30 mg/L. Equilibrium adsorption data were analyzed by the Langmuir and Freundlich models - however, the Freundlich model provided a better fit with the experimental data...
April 25, 2017: International Journal of Phytoremediation
https://www.readbyqxmd.com/read/28429461/deodorization-of-arthrospira-platensis-biomass-for-further-scale-up-food-applications
#3
Sara P Cuellar-Bermúdez, Bertha Barba-Davila, Sergio O Serna-Saldivar, Roberto Parra-Saldivar, José Rodriguez-Rodriguez, Sandra Morales-Davila, Koen Goiris, Koenraad Muylaert, Cristina Chuck-Hernández
BACKGROUND: Given the importance of A. platensis as a potential food protein source, we achieve an affordable deodorization process that does not significantly affect the nutritional value of algae biomass. RESULTS: Ethanol, acetone or hexane were used to deodorize algae biomass and then to identify the profile of volatile compounds associated with its distinctive odor. Sensorial characteristics were improved in the biomass cake after the proposed solvent extraction...
April 21, 2017: Journal of the Science of Food and Agriculture
https://www.readbyqxmd.com/read/28422294/antiviral-activity-of-exopolysaccharides-from-arthrospira-platensis-against-koi-herpesvirus
#4
M Reichert, S M Bergmann, J Hwang, R Buchholz, C Lindenberger
Although koi herpesvirus (KHV) has a history of causing severe economic losses in common carp and koi farms, there are still no treatments available on the market. Thus, the aim of this study was to test exopolysaccharides (EPS) for its antiviral activity against KHV, by monitoring inhibition and cytotoxic effects in common carp brain cells. These substances can be easily extracted from extracellular algae supernatant and were identified as groups of sulphated polysaccharides. In order to reach this aim, Arthrospira platensis, which is well known for its antiviral activity of intra- and extracellular compounds towards mammalian herpesviruses, was investigated as standard organism and compared to commercial antiviral drug, ganciclovir, which inhibits the viral DNA polymerization...
April 19, 2017: Journal of Fish Diseases
https://www.readbyqxmd.com/read/28417328/characterization-and-pyrolysis-of-chlorella-vulgaris-and-arthrospira-platensis-potential-of-bio-oil-and-chemical-production-by-py-gc-ms-analysis
#5
Hanna N Almeida, Guilherme Q Calixto, Bruna M E Chagas, Dulce M A Melo, Fabio M Resende, Marcus A F Melo, Renata Martins Braga
Biofuels have been seen as potential sources to meet future energy demand as a renewable and sustainable energy source. Despite the fact that the production technology of first-generation biofuels is consolidated, these biofuels are produced from foods crops such as grains, sugar cane, and vegetable oils competing with food for crop use and agricultural land. In recent years, it was found that microalgae have the potential to provide a viable alternative to fossil fuels as source of biofuels without compromising food supplies or arable land...
April 17, 2017: Environmental Science and Pollution Research International
https://www.readbyqxmd.com/read/28416127/experimental-and-modelling-of-arthrospira-platensis-cultivation-in-open-raceway-ponds
#6
Panneerselvam Ranganathan, J C Amal, S Savithri, Ajith Haridas
In this study, the growth of Arthrospira platensis was studied in an open raceway pond. Furthermore, dynamic model for algae growth and CFD modelling of hydrodynamics in open raceway pond were developed. The dynamic behaviour of the algal system was developed by solving mass balance equations of various components, considering light intensity and gas-liquid mass transfer. A CFD modelling of the hydrodynamics of open raceway pond was developed by solving mass and momentum balance equations of the liquid medium...
March 27, 2017: Bioresource Technology
https://www.readbyqxmd.com/read/28400171/impact-of-different-nitrogen-sources-on-the-growth-of-arthrospira-sp-pcc-8005-under-batch-and-continuous-cultivation-a-biochemical-transcriptomic-and-proteomic-profile
#7
Frédéric Deschoenmaeker, Guillaume Bayon-Vicente, Neha Sachdeva, Orily Depraetere, Juan Carlos Cabrera Pino, Baptiste Leroy, Koenraad Muylaert, Ruddy Wattiez
The aim of the present study was to evaluate the effects of varying concentrations of different nitrogen sources (individually or in combination) on the biochemical, transcriptomic and proteomic profiles of Arthrospira sp. PCC 8005 under batch and continuous modes. In batch mode, while ammonium showed a repressive effect on nitrate-assimilation pathway of the cyanobacteria; better growth and nutrient uptake rate were observed in presence of urea than nitrate. The inhibitory effect of ammonium was further confirmed by the continuous photobioreactor study wherein the nutrient feed was transiently replaced from nitrate to ammonium (28mM turbiostat regime)...
March 27, 2017: Bioresource Technology
https://www.readbyqxmd.com/read/28371918/functional-lycopene-cyclase-crua-in-cyanobacterium-arthrospira-platensis-nies-39-and-its-role-in-carotenoid-synthesis
#8
Kenjiro Sugiyama, Masashi Ebisawa, Masaharu Yamada, Yoshiki Nagashima, Hideyuki Suzuki, Takashi Maoka, Shinichi Takaichi
The genus Arthrospira is filamentous, non-nitrogen-fixing cyanobacteria that is commercially important. We identified the molecular structures of carotenoids in Arthrospira platensis NIES-39. The major carotenoid identified was β-carotene. In addition, the hydroxyl derivatives of β-cryptoxanthin and (3R,3'R)-zeaxanthin were also found to be present. The carotenoid glycosides were identified as (3R,2'S)-myxol 2'-methylpentoside and oscillol 2,2'-dimethylpentoside. The methylpentoside moiety was a mixture of fucoside and chinovoside in an approximate ratio of 1 : 4...
April 1, 2017: Plant & Cell Physiology
https://www.readbyqxmd.com/read/28344389/reductive-activity-of-free-and-immobilized-cells-of-cyanobacteria-toward-oxophosphonates-comparative-study
#9
Monika Górak, Ewa Żymańczyk-Duda
This report, based on the previous studies, compares the reductive activity of different modes of following photobiocatalysts (on laboratory and preparative scale): Arthrospira maxima, Nostoc cf. muscorum and Nodularia sphaerocarpa, toward diethyl esters of 2-oxopropylphosphonate (1), 2-oxo-2-phenylethylphosphonate (2), and 2-oxobutylphosphonate (3). It was confirmed that immobilization in alginate matrix do not affect the activity and viability of the biocatalysts. Corresponding (S)-hydroxyphosphonates (1a-3a) were obtained with similar efficiency compared to the free-cell mode with the yield and of the optical purity e...
2017: Journal of Applied Phycology
https://www.readbyqxmd.com/read/28188780/structural-insights-into-the-cold-adaptation-of-the-photosynthetic-pigment-protein-c-phycocyanin-from-an-arctic-cyanobacterium
#10
Hai-Nan Su, Qian-Min Wang, Chun-Yang Li, Kang Li, Wei Luo, Bo Chen, Xi-Ying Zhang, Qi-Long Qin, Bai-Cheng Zhou, Xiu-Lan Chen, Yu-Zhong Zhang, Bin-Bin Xie
The cold adaptation mechanism of phycobiliproteins, the major photosynthetic pigment-proteins in cyanobacteria and red algae, has rarely been studied. Here we reported the biochemical, structural, and molecular dynamics simulation study of the C-phycocyanin from Arctic cyanobacterial strain Pseudanabaena sp. LW0831. We characterized the phycobilisome components of LW0831 and obtained their gene sequences. Compared to the mesophilic counterpart from Arthrospira platensis (Ar-C-PC), LW0831 C-phycocyanin (Ps-C-PC) has a decreased thermostability (∆Tm of -16°C), one of the typical features of cold-adapted enzymes...
April 2017: Biochimica et Biophysica Acta
https://www.readbyqxmd.com/read/28185041/variety-in-excitation-energy-transfer-processes-from-phycobilisomes-to-photosystems-i-and-ii
#11
Yoshifumi Ueno, Shimpei Aikawa, Kyosuke Niwa, Tomoko Abe, Akio Murakami, Akihiko Kondo, Seiji Akimoto
The light-harvesting antennas of oxygenic photosynthetic organisms capture light energy and transfer it to the reaction centers of their photosystems. The light-harvesting antennas of cyanobacteria and red algae, called phycobilisomes (PBSs), supply light energy to both photosystem I (PSI) and photosystem II (PSII). However, the excitation energy transfer processes from PBS to PSI and PSII are not understood in detail. In the present study, the energy transfer processes from PBS to PSs in various cyanobacteria and red algae were examined in vivo by selectively exciting their PSs or PBSs, and measuring the resulting picosecond to nanosecond time-resolved fluorescences...
February 9, 2017: Photosynthesis Research
https://www.readbyqxmd.com/read/28182098/antioxidant-immunomodulating-and-microbial-modulating-activities-of-the-sustainable-and-ecofriendly-spirulina
#12
REVIEW
Alberto Finamore, Maura Palmery, Sarra Bensehaila, Ilaria Peluso
The highly nutritional and ecofriendly Spirulina (Arthrospira platensis) has hypolipidemic, hypoglycemic, and antihypertensive properties. Spirulina contains functional compounds, such as phenolics, phycocyanins, and polysaccharides, with antioxidant, anti-inflammatory, and immunostimulating effects. Studies conducted on Spirulina suggest that it is safe in healthy subjects, but attitude to eating probably affects the acceptability of Spirulina containing foods. Although the antioxidant effect of Spirulina is confirmed by the intervention studies, the concerted modulation of antioxidant and inflammatory responses, suggested by in vitro and animal studies, requires more confirmation in humans...
2017: Oxidative Medicine and Cellular Longevity
https://www.readbyqxmd.com/read/28166438/supplementation-of-spirulina-arthrospira-platensis-improves-lifespan-and-locomotor-activity-in-paraquat-sensitive-dj-1%C3%AE-%C3%AE-93-flies-a-parkinson-s-disease-model-in-drosophila-melanogaster
#13
Ajay Kumar, Pearl K Christian, Komal Panchal, B R Guruprasad, Anand K Tiwari
Spirulina (Arthrospira platensis) is a cyanobacterium (blue-green alga) consumed by humans and other animals because of its nutritional values and pharmacological properties. Apart from high protein contents, it also contains high levels of antioxidant and anti-inflammatory compounds, such as carotenoids, β-carotene, phycocyanin, and phycocyanobilin, indicating its possible pharmaco-therapeutic utility. In the present study using DJ-1β(Δ93) flies, a Parkinson's disease model in Drosophila, we have demonstrated the therapeutic effect of spirulina and its active component C-phycocyanin (C-PC) in the improvement of lifespan and locomotor behavior...
September 3, 2017: Journal of Dietary Supplements
https://www.readbyqxmd.com/read/28158667/overcoming-intrinsic-restriction-enzyme-barriers-enhances-transformation-efficiency-in-arthrospira-platensis-c1
#14
Wattana Jeamton, Sudarat Dulsawat, Morakot Tanticharoen, Avigad Vonshak, Supapon Cheevadhanarak
The development of a reliable genetic transformation system for Arthrospira platensis has been a long-term goal, mainly for those trying either to improve its performance in large-scale cultivation systems or to enhance its value as food and feed additives. However, so far, most of the attempts to develop such a transformation system have had limited success. In this study, an efficient and stable transformation system for A. platensis C1 was successfully developed. Based on electroporation and transposon techniques, exogenous DNA could be transferred to and stably maintained in the A...
April 1, 2017: Plant & Cell Physiology
https://www.readbyqxmd.com/read/28074411/biomass-and-terpenoids-produced-by-mutant-strains-of-arthrospira-under-low-temperature-and-light-conditions
#15
Jian Guan, Songdong Shen, Hao Wu, Xin Liu, Weijie Shen, Yuan He, R Duan
The filamentous Cyanobacterium Arthrospira is commercially produced and is a functional, high-value, health food. We identified 5 low temperature and low light intensity tolerant strains of Arthrospira sp. (GMPA1, GMPA7, GMPB1, GMPC1, and GMPC3) using ethyl methanesulfonate mutagenesis and low temperature screening. The 5 Arthrospira strains grew rapidly below 14 °C, 43.75 μmol photons m(-2) s(-1) and performed breed conservation at 2.5 °C, 8.75 μmol photons m(-2) s(-1). We used morphological identification and molecular genetic analysis to identify GMPA1, GMPA7, GMPB1 and GMPC1 as Arthrospira platensis, while GMPC3 was identified as Arthrospira maxima...
February 2017: World Journal of Microbiology & Biotechnology
https://www.readbyqxmd.com/read/28045976/microbial-diversity-and-cyanobacterial-production-in-dziani-dzaha-crater-lake-a-unique-tropical-thalassohaline-environment
#16
Christophe Leboulanger, Hélène Agogué, Cécile Bernard, Marc Bouvy, Claire Carré, Maria Cellamare, Charlotte Duval, Eric Fouilland, Patrice Got, Laurent Intertaglia, Céline Lavergne, Emilie Le Floc'h, Cécile Roques, Gérard Sarazin
This study describes, for the first time, the water chemistry and microbial diversity in Dziani Dzaha, a tropical crater lake located on Mayotte Island (Comoros archipelago, Western Indian Ocean). The lake water had a high level of dissolved matter and high alkalinity (10.6-14.5 g L-1 eq. CO32-, i.e. 160-220 mM compare to around 2-2.5 in seawater), with salinity up to 52 psu, 1.5 higher than seawater. Hierarchical clustering discriminated Dziani Dzaha water from other alkaline, saline lakes, highlighting its thalassohaline nature...
2017: PloS One
https://www.readbyqxmd.com/read/28044454/effects-of-fasting-and-refeeding-on-the-digestive-tract-of-zebrafish-danio-rerio-fed-with-spirulina-arthrospira-platensis-a-high-protein-feed-source
#17
Patrizia Lo Cascio, Concetta Calabrò, Clara Bertuccio, Irene Paterniti, Deborah Palombieri, Margherita Calò, Ambrogina Albergamo, Andrea Salvo, Maria Gabriella Denaro
In the present work, morphological and molecular effects of short-term feed deprivation and refeeding with Spirulina (Arthrospira platensis) on zebrafish digestive tract were determined. Once elucidated the proximate composition of Spirulina feed, immunohistochemical and western blot analyses of peptide transporter (PepT1) and cholecystokinin (CCK8) were carried out in the gastrointestinal tract of zebrafish, previously morphologically investigated. Two and five fasting days caused not only morphostructural alterations, but also the downregulation of PepT1 and CCK8 proteins...
January 3, 2017: Natural Product Research
https://www.readbyqxmd.com/read/28043868/evaluation-of-anaerobic-digestates-from-different-feedstocks-as-growth-media-for-tetradesmus-obliquus-botryococcus-braunii-phaeodactylum-tricornutum-and-arthrospira-maxima
#18
Marina Massa, Silvia Buono, Antonio Luca Langellotti, Luigi Castaldo, Anna Martello, Antonello Paduano, Raffaele Sacchi, Vincenzo Fogliano
In this paper, two freshwater microalgae (Tetradesmus obliquus and Botryococcus braunii), a marine diatom (Phaeodactylum tricornutum) and a photosynthetic cyanobacterium (Arthrospira maxima) were investigated for their ability to grow on liquid digestates (LDs). Three LDs were obtained from anaerobic digestion of different organic wastes: zootechnical (ZW LD), vegetable biomass (VW LD) and the organic fraction of municipal solid wastes (MW LD). All the strains showed the same growth performance on VW LD as on the respective standard media (SM), while ZW LD was efficient only for growth of T...
May 25, 2017: New Biotechnology
https://www.readbyqxmd.com/read/28025700/use-of-the-effluent-from-biogas-production-for-cultivation-of-spirulina
#19
Malin Hultberg, Olle Lind, Göran Birgersson, Håkan Asp
The effluent from the biogas process was tested as a nutrient source during cultivation of the protein-rich and edible microalgae Spirulina (Arthrospira platensis) and compared with conventional Spirulina medium. Equal biomass production was observed until late exponential phase and no significant differences could be observed between the treatments in protein amount, amino acid composition, and total lipid concentration. The concentration of the pigment phycocyanin differed significantly between Spirulina medium and the effluent-based medium (63...
April 2017: Bioprocess and Biosystems Engineering
https://www.readbyqxmd.com/read/28004519/antimicrobial-assay-and-genetic-screening-of-selected-freshwater-cyanobacteria-and-identification-of-a-biomolecule-dihydro-2h-pyran-2-one-derivative
#20
A Srivastava, V K Singh, S Patnaik, J Tripathi, P Singh, G Nath, R K Asthana
AIMS: Explorations of freshwater Cyanobacteria as antimicrobial (bacteria, fungi and methicillin-resistant Staphylococcus aureus (MRSA) strains) drug resource using bioassay, NRPS (non-ribosomal polypeptide synthetase) and PKS (polyketide synthase) genes, as well as in silico approach. METHODS AND RESULTS: We have bioassayed the extracts of Phormidium CCC727, Geitlerinema CCC728, Arthrospira CCC729, Leptolyngbya CCC732, Phormidium CCC730, Phormidium CCC731 against six pathogenic bacteria comprising Gram (+ve): S...
April 2017: Journal of Applied Microbiology
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