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1. Anti-inflammatory and neuroprotective evaluation of diverse microalgae extracts enriched in carotenoids

Author:
Rocío Gallego; Alberto Valdés; Zully J. Suárez-Montenegro; José David Sánchez-Martínez; Alejandro Cifuentes; Elena Ibáñez; Miguel Herrero
Source:
Algal research 2022 v.67 pp. 102830
ISSN:
2211-9264
Subject:
Haematococcus pluvialis; Nannochloropsis; Porphyridium cruentum; antioxidants; bioactive compounds; carotenoids; cholinesterase; cytokines; cytotoxicity; health promotion; microalgae; research
Abstract:
... Microalgae represent one of the most promising sources of bioactive compounds for the pharmaceutical and food industries. Among these bioactives, carotenoids could be highlighted due to their health-promoting effects, including anti-inflammatory, neuroprotective or antioxidant properties. In this study, diverse microalgae extracts enriched in carotenoids, including extracts from Haematococcus pluv ...
DOI:
10.1016/j.algal.2022.102830

2. Effects of light intensity and culture medium on the chemical composition and growth parameters of Nannochloropsis oculata and Porphyridium cruentum

Author:
Rocio Janeth Aguilar‐Ruiz; Dalia Isabel Sánchez‐Machado; María del Rosario Martinez‐Macias; Jaime López‐Cervantes; Omar Nateras‐Ramírez; Olga Nydia Campas‐Baypoli; Yedidia Villegas‐Peralta
Source:
Aquaculture research 2022 v.53 no.15 pp. 5239-5252
ISSN:
1355-557X
Subject:
Nannochloropsis; Porphyridium cruentum; alpha-tocopherol; amino acids; aquaculture; carbohydrates; culture media; light intensity; microalgae; nutritive value; protein content; research
Abstract:
... Microalgae are considered sources of compounds of high nutritional value. This study determined whether 400 μE/m²/s (HL) and 80 μE/m²/s (LL) light intensities and algal medium (AM) and f/2 Guillard medium (f/2GM) influence kinetic parameters, moisture, ash, lipids, carbohydrate, protein, amino acid, vitamins contents of the microalgae Nannochloropsis oculata and Porphyridium cruentum. N. oculata r ...
DOI:
10.1111/are.16007

3. Impact of light wavelength on the transcriptome of Porphyridium cruentum and culture yield

Author:
Erika Juliana Obando-Montoya; Paola Andrea Zapata-Ocampo; Yesid Cuesta-Astroz; Lucía Atehortua
Source:
Algal research 2022 v.67 pp. 102856
ISSN:
2211-9264
Subject:
Porphyridium cruentum; biomass; cell cycle; cyclins; energy; gene expression regulation; microalgae; photosynthesis; phycobiliprotein; research; transcriptome; viability; wavelengths
Abstract:
... Changes in light wavelength can alter the phycobiliprotein content in photosynthetic organisms. These molecules are involved in harvesting light energy for photosynthesis and are interesting microalgal products. Furthermore, increasing or modifying phycobiliprotein content in eukaryotic microalgae is possible. Specifically, exposure to different wavelengths triggers their ability to switch their m ...
DOI:
10.1016/j.algal.2022.102856

4. Integrated green one-step strategy for concurrent recovery of phycobiliproteins and polyunsaturated fatty acids from wet Porphyridium biomass

Author:
Zicheng Huang; Shuai Guo; Zheng Guo; Yongjin He; Bilian Chen
Source:
Food chemistry 2022 v.389 pp. 133103
ISSN:
0308-8146
Subject:
Porphyridium cruentum; ammonium sulfate; biobased products; biomass; cost effectiveness; food chemistry; phycobiliprotein; renewable resources; slurries
Abstract:
... A novel and green one-step simultaneous extraction process of phycobiliproteins and polyunsaturated fatty acids (PUFAs) from wet Porphyridium biomass has been done and optimized by using three phase partitioning (TPP) process. Results showed that the coupling of ammonium sulfate and protein buoyancy-promoting t-butanol afforded the best TPP to extract phycobiliproteins and PUFAs in term of the ext ...
DOI:
10.1016/j.foodchem.2022.133103

5. Administration of Dietary Microalgae Ameliorates Intestinal Parameters, Improves Body Weight, and Reduces Thawing Loss of Fillets in Broiler Chickens: A Pilot Study

Author:
Miroslava Anna Šefcová; Francisco Santacruz; César Marcelo Larrea-Álvarez; Christian Vinueza-Burgos; David Ortega-Paredes; Gabriel Molina-Cuasapaz; Jessica Rodríguez; William Calero-Cáceres; Viera Revajová; Esteban Fernández-Moreira; Marco Larrea-Álvarez
Source:
Animals 2021 v.11 no.12 pp. -
ISSN:
2076-2615
Subject:
Porphyridium cruentum; Tetraselmis chuii; biomass; body weight; cell differentiation; growth performance; homeostasis; ileum; ingestion; males; meat quality; microalgae; morphometry; nutrient uptake; weight loss
Abstract:
... This pilot investigation aimed at studying the feasibility of using a low dose (0.2%) of dietary microalgae as a means of improving intestinal morphometry, body weight, and selected meat quality parameters in broilers. A total of 72 one-day-old ROSS 308 male chicks were randomly separated into four groups; three experimental pens in which the birds were fed with biomass from Tysochrysis lutea, Tet ...
DOI:
10.3390/ani11123601

6. Comparison on characterization and antioxidant activity of exopolysaccharides from two Porphyridium strains

Author:
Wei-Nan Wang; Yi Li; Ying Zhang; Wen-Zhou Xiang; Ai-Fen Li; Tao Li
Source:
Journal of applied phycology 2021 v.33 no.5 pp. 2983-2994
ISSN:
0921-8971
Subject:
Porphyridium cruentum; algology; antioxidant activity; cosmetics; exopolysaccharides; galactose; glucose; health services; medicine; sulfates; xylose
Abstract:
... The exopolysaccharides (EPS) excreted by the unicellular red alga, Porphyridium, have potential applications in medicine, cosmetics, and health care products. In the present study, two different Porphyridium stains, i.e., Porphyridium cruentum CCALA 415 and Porphyridium purpureum FACHB 806, were selected and their EPS productivity, chemical characteristics, and antioxidant activities were compared ...
DOI:
10.1007/s10811-021-02518-9

7. Harvesting of Microalgae Biomass Using Ceramic Microfiltration at High Cross-Flow Velocity

Author:
Bio Sigui B. Bamba; Carole C. Tranchant; Allassane Ouattara; Paul Lozano
Source:
Applied biochemistry and biotechnology 2021 v.193 no.4 pp. 1147-1169
ISSN:
0273-2289
Subject:
Chlorella vulgaris; Porphyridium cruentum; adsorption; biochemistry; biomass; biotechnology; ceramics; feedstocks; filterability; hydrodynamics; microalgae; microfiltration; permeability
Abstract:
... This study aimed to investigate the harvesting of microalgae by microfiltration (MF) on a ceramic membrane at relatively high cross-flow velocity (CFV) of interest for commercial processes. Pilot-scale harvesting was conducted with algal suspensions (Chlorella vulgaris and Tisochrysis lutea (T-Iso)) and algal supernatants (Porphyridium cruentum) to assess the effect of feedstock characteristics an ...
DOI:
10.1007/s12010-020-03455-y

8. Phycobilin heterologous production from the Rhodophyta Porphyridium cruentum

Author:
Erika Juliana Obando Montoya; Sonia Dorion; Lucía Atehortua-Garcés; Jean Rivoal
Source:
Journal of biotechnology 2021 v.341 pp. 30-42
ISSN:
0168-1656
Subject:
Escherichia coli; Porphyridium cruentum; biochemical pathways; biotechnology; enzyme activity; fluorescence emission spectroscopy; oxidoreductases; phycobilin; phycobiliprotein; thin layer chromatography; transcriptome
Abstract:
... Phycobiliproteins are colored, active molecules with potential use in different industries. They are the union of proteins and bilins (Chromophores). The primary source of phycobiliproteins is algae; however, the traditional algae culture has production restrictions. The production in bacterial models can be a more efficient alternative to produce these molecules. However, the lack of knowledge in ...
DOI:
10.1016/j.jbiotec.2021.09.001

9. Rapid green synthesis of silver nanoparticles using sulfated polysaccharides originating from Porphyridium cruentum UTEX 161: evaluation of antibacterial and catalytic activities

Author:
Min Seo Jeon; Sang-Il Han; Yun Hwan Park; Ho Seon Kim; Yoon-E Choi
Source:
Journal of applied phycology 2021 v.33 no.5 pp. 3091-3101
ISSN:
0921-8971
Subject:
Bacillus subtilis; Escherichia coli; Porphyridium cruentum; Pseudomonas aeruginosa; Staphylococcus aureus; algology; catalytic activity; methylene blue; microalgae; nanosilver; particle size; polysaccharides; sodium borohydride; surface plasmon resonance
Abstract:
... Silver nanoparticles (AgNPs) have gained considerable attention amongst researchers in various applications, owing to their physiochemical and biological properties. Due to disadvantages of previous synthesis methods, various green synthesis methods have been tried recently. In this study, a one-pot method for the synthesis of silver nanoparticles (AgNPs) was investigated through an environmentall ...
DOI:
10.1007/s10811-021-02540-x

10. Semi-continuous immobilized cultivation of Porphyridium cruentum for sulfated polysaccharides production

Author:
Sang-Il Han; Min Seo Jeon; Yun Hwan Park; Sok Kim; Yoon-E Choi
Source:
Bioresource technology 2021 v.341 pp. 125816
ISSN:
0960-8524
Subject:
Porphyridium cruentum; bioactive properties; biomass; calcium alginate; chemical composition; lighting; phycobiliprotein; polymers; wavelengths
Abstract:
... In this study, semi-continuous immobilized cultivation of Porphyridium cruentum through calcium alginate beads was performed for sulfated polysaccharides (SPs) production. The cell biomass and daily SPs productivity in the calcium alginate bead immobilized culture were increased by up to 79 ± 3.4% and 45.6 ± 3.2%, compared to those in the control, respectively. Furthermore, simultaneous applicatio ...
DOI:
10.1016/j.biortech.2021.125816

11. Sulfated exopolysaccharides from Porphyridium cruentum: A useful strategy to extend the shelf life of minced beef meat

Author:
Hajer Ben Hlima; Slim Smaoui; Mohamed Barkallah; Khaoula Elhadef; Latifa Tounsi; Philippe Michaud; Imen Fendri; Slim Abdelkafi
Source:
International journal of biological macromolecules 2021 v.193 pp. 1215-1225
ISSN:
0141-8130
Subject:
DNA; Porphyridium cruentum; antioxidants; cations; cluster analysis; emulsions; exopolysaccharides; free radicals; lipid peroxidation; livestock and meat industry; microorganisms; minced beef; principal component analysis; refrigeration; shelf life; storage time
Abstract:
... Sulfated exopolysaccharides (EPS) from Porphyridium cruentum strain were extracted and their antioxidant and anti-bacterial potentials were evaluated based on DPPH free radical, ABTS•⁺ radical cation and DNA nicking assays, and against four foodborne pathogenic bacteria, respectively. They showed also interesting functional, foaming and emulsion properties. Moreover, microbiological and chemical e ...
DOI:
10.1016/j.ijbiomac.2021.10.161

12. Antihyperglycemic activity of Porphyridium cruentum biomass and extra-cellular polysaccharide in streptozotocin-induced diabetic rats

Author:
Iriani Setyaningsih; Himawan Prasetyo; Dewi Ratih Agungpriyono; Kustiariyah Tarman
Source:
International journal of biological macromolecules 2020 v.156 pp. 1381-1386
ISSN:
0141-8130
Subject:
Porphyridium cruentum; animal disease models; biomass; blood glucose; body weight; diabetes; food intake; glibenclamide; glycemic effect; health effects assessments; intestines; islets of Langerhans; microalgae; polysaccharides; rats; streptozotocin; villi
Abstract:
... Porphyridium cruentum, known as red microalga, is able to produce extra-cellular polysaccharides (EPs) that have beneficial health effects. In this study, the effect of P. cruentum biomass and EPs with various doses was studied in streptozotocin (STZ)-induced diabetic rats to determine their antihyperglycemic activity and its potential mechanism. The doses of biomass were 600, 1200 and 1800 mg/kg ...
DOI:
10.1016/j.ijbiomac.2019.11.178

13. Biochemical changes in microalga Porphyridium cruentum associated with silver nanoparticles biosynthesis

Author:
Liliana Cepoi; Ludmila Rudi; Inga Zinicovscaia; Tatiana Chiriac; Vera Miscu; Valeriu Rudic
Source:
Archives of microbiology 2021 v.203 no.4 pp. 1547-1554
ISSN:
0302-8933
Subject:
Fourier transform infrared spectroscopy; Porphyridium cruentum; X-ray diffraction; biomass; biosynthesis; drugs; industry; microalgae; microbiology; nanosilver; phycobilin; phycobiliprotein; silver nitrate; ultraviolet-visible spectroscopy
Abstract:
... For the first time, the microalga Porphyridium cruentum was tested for its ability to produce silver nanoparticles. To characterize formed silver nanoparticles UV–vis Spectrometry, Scanning Electron Microscopy, Energy-dispersive analysis of X-rays and X-ray diffraction were used. It was shown that after biomass exposure to silver nitrate solution the extracellular formation of spherical-like nanop ...
DOI:
10.1007/s00203-020-02143-z

14. Cold stress treatment enhances production of metabolites and biodiesel feedstock in Porphyridium cruentum via adjustment of cell membrane fluidity

Author:
Jim Junhui Huang; Peter Chi Keung Cheung
Source:
Science of the total environment 2021 v.780 pp. 146612
ISSN:
0048-9697
Subject:
Porphyridium cruentum; biodiesel; biomass; biosynthesis; cell membranes; cold stress; eicosatrienoic acid; environment; feedstocks; linoleic acid; membrane fluidity; metabolites; microalgae; principal component analysis; zeaxanthin
Abstract:
... Porphyridium cruentum, a cell-wall-free marine Rhodophyta microalga was cultured under a 5-day cold stress at 0 °C and 15 °C, after reaching the late logarithmic growth phase. Compared with the control at 25 °C, the cold stress treatment significantly (p < 0.05) increased the microalgal biomass (1.21-fold); the amounts of total polyunsaturated fatty acids (1.22-fold); individual fatty acids includ ...
DOI:
10.1016/j.scitotenv.2021.146612

15. Effect of Pseudoalteromonas sp. MEBiC 03485 on biomass production and sulfated polysaccharide biosynthesis in Porphyridium cruentum UTEX 161

Author:
Sang-Il Han; Min Seo Jeon; Young Mok Heo; Sok Kim; Yoon-E Choi
Source:
Bioresource technology 2020 v.302 pp. 122791
ISSN:
0960-8524
Subject:
Porphyridium cruentum; Pseudoalteromonas; bioactive properties; biomass production; biosynthesis; coculture; phycocyanin; phycoerythrin; polysaccharides
Abstract:
... The effect of co-cultivation of Porphyridium cruentum UTEX 161 with Pseudoalteromonas sp. MEBiC 03485 on P. cruentum growth and its sulfated polysaccharide (EPS) production were examined. The strain MEBiC 03485 had beneficial effects on P. cruentum growth, EPS production, and EPS quality. These effects were due to a compound secreted by the strain MEBiC 03485. Notably, secretory compound treatment ...
DOI:
10.1016/j.biortech.2020.122791

16. Enhanced biogas production of red microalgae via enzymatic pretreatment and preliminary economic assessment

Author:
Ece Kendir Çakmak; Aysenur Ugurlu
Source:
Algal research 2020 v.50 pp. 101979
ISSN:
2211-9264
Subject:
Porphyridium cruentum; biomass; cell membranes; cell walls; dosage; economic feasibility; gas production (biological); logit analysis; methane; methane production; microalgae; microorganisms; organic matter; pretreatment; proteinases; research; solubilization
Abstract:
... Microalgal biomass is a promising candidate for biogas production, however; cell characteristics may prevent accessibility of anaerobic microorganisms to organic matter and limits methane production from microalgae. Pretreatments provide enhancement in methane yields via cell wall disruption and cell membrane solubilization. In this study, improvement of methane production from Porphyridium cruent ...
DOI:
10.1016/j.algal.2020.101979

17. Exopolysaccharide from Porphyridium cruentum (purpureum) is Not Toxic and Stimulates Immune Response against Vibriosis: The Assessment Using Zebrafish and White Shrimp Litopenaeus vannamei

Author:
Yenny Risjani; Nurul Mutmainnah; Praprianita Manurung; Siti Narsito Wulan; Yunianta
Source:
Marine drugs 2021 v.19 no.3 pp. -
ISSN:
1660-3397
Subject:
Danio rerio; Litopenaeus vannamei; Porphyridium cruentum; Vibrio; embryogenesis; embryotoxicity; exopolysaccharides; hemocytes; immune response; immunostimulants; metabolites; microalgae; models; mortality; respiratory burst; shrimp; toxicity testing; vibriosis
Abstract:
... Exopolysaccharides, or extracellular polysaccharides (EPS, sPS), represent a valuable metabolite compound synthesized from red microalgae. It is a non-toxic natural agent and can be applied as an immunostimulant. The toxicity test of exopolysaccharides from Porphyridium has been done in vivo using zebrafish (Danio rerio) embryonic model, or the ZET (zebrafish embryotoxicity test). The administrati ...
DOI:
10.3390/md19030133

18. Filterability of exopolysaccharides solutions from the red microalga Porphyridium cruentum by tangential filtration on a polymeric membrane

Author:
Lisa Zaouk; Anthony Massé; Patrick Bourseau; Samir Taha; Murielle Rabiller-Baudry; Sébastien Jubeau; Benoit Teychené; Jérémy Pruvost; Pascal Jaouen
Source:
Environmental technology 2020 v.41 no.9 pp. 1167-1184
ISSN:
1479-487X
Subject:
Porphyridium cruentum; culture media; exopolysaccharides; filterability; fouling; microalgae; pigments; polymers; temperature; ultrafiltration
Abstract:
... The red microalga Porphyridium cruentum is exploited industrially for its exopolysaccharides (EPS) and pigments production. EPS produced by P. cruentum are partially released and dissolved into the surrounding environment, they can be recovered from the culture medium after removing the cells. This paper presents a parametric study of the ultrafiltration of EPS solutions on organic membrane. The E ...
DOI:
10.1080/09593330.2018.1523234

19. Simultaneous enhancement on renewable bioactive compounds from Porphyridium cruentum via a novel two-stage cultivation

Author:
Zicheng Huang; Chen Zhong; Jingxuan Dai; Shuning Li; Mingmin Zheng; Yongjin He; Mingzi Wang; Bilian Chen
Source:
Algal research 2021 v.55 pp. 102270
ISSN:
2211-9264
Subject:
Porphyridium cruentum; biomass; cell growth; cosmetics; drugs; exopolysaccharides; microalgae; research; wavelengths
Abstract:
... Porphyridium cruentum is a versatile cell factory to produce various bioactive and vital substances for food, feed, cosmetics and pharmaceuticals. In this study, a novel two-stage cultivation was the first time to establish for microalgal growth and bioactive compounds production by regulating light-emitting diodes wavelengths using marine microalga Porphyridium cruentum. Firstly, the best light l ...
DOI:
10.1016/j.algal.2021.102270

20. Using spray-dried microalgae in ice cream formulation as a natural colorant: Effect on physicochemical and functional properties

Author:
Yaşar Durmaz; Mahmut Kilicli; Omer Said Toker; Nevzat Konar; Ibrahim Palabiyik; Faruk Tamtürk
Source:
Algal research 2020 v.47 pp. 101811
ISSN:
2211-9264
Subject:
Nannochloropsis; Porphyridium cruentum; biomass; color; dyes; functional properties; ice cream; melting; microalgae; models; sensory properties; spray drying
Abstract:
... Microalgae can potentially be used as a food ingredient due to its biochemical composition that can enrich the bioactive compound content of the food products. In the present study, spray-dried Nannochloropsis oculata, Porphyridium cruentum and Diacronema vlkianum microalgae species were added to ice cream formulation at different concentrations (0.10, 0.20 and 0.30 g 100 g⁻¹). The effect of micro ...
DOI:
10.1016/j.algal.2020.101811

21. Carotenoid profiling of five microalgae species from large-scale production

Author:
Gabriella Di Lena; Irene Casini; Massimo Lucarini; Ginevra Lombardi-Boccia
Source:
Food research international 2019 v.120 pp. 810-818
ISSN:
0963-9969
Subject:
Isochrysis galbana; Nannochloropsis; Phaeodactylum tricornutum; Porphyridium cruentum; Tetraselmis suecica; aquaculture; beta-carotene; biomass; functional foods; microalgae; photobioreactors; ultrasonics; vegetables; xanthophylls
Abstract:
... The carotenoid profiles of biomass from five eukaryotic microalgae, Porphyridium cruentum, Isochrysis galbana, Phaeodactylum tricornutum, Tetraselmis suecica and Nannochloropsis gaditana, produced at an industrial plant in outdoor photobioreactors, were investigated. Pigments were solvent-extracted after an ultrasonic pre-treatment and separated by HPLC-photodiode-array using a reversed-phase C18 ...
DOI:
10.1016/j.foodres.2018.11.043

22. Effect of high hydrostatic pressure on extraction of B-phycoerythrin from Porphyridium cruentum: Use of confocal microscopy and image processing

Author:
Thierry Tran; Emmanuel Denimal; Céline Lafarge; Ludovic Journaux; John Aldo Lee; Pascale Winckler; Jean-Marie Perrier-Cornet; Rémi Pradelles; Camille Loupiac; Nathalie Cayot
Source:
Algal research 2019 v.38 pp. 101394
ISSN:
2211-9264
Subject:
Porphyridium cruentum; algae; confocal laser scanning microscopy; denaturation; fluorescence; high pressure treatment; image analysis; spectroscopy
Abstract:
... The aim of the study was to extract B-phycoerythrin from Porphyridium cruentum while preserving its structure. The high hydrostatic pressure treatments were chosen as extraction technology. Different methods have been used to observe the effects of the treatment: spectrophotometry and confocal laser scanning microscopy followed by image processing analysis. Image processing led to the generation o ...
DOI:
10.1016/j.algal.2018.101394

23. Effect of high hydrostatic pressure on the structure of the soluble protein fraction in Porphyridium cruentum extracts

Author:
Thierry Tran; Céline Lafarge; Rémi Pradelles; Jean-Marie Perrier-Cornet; Nathalie Cayot; Camille Loupiac
Source:
Innovative food science & emerging technologies 2019 v.58 pp. 102226
ISSN:
1466-8564
Subject:
Porphyridium cruentum; cosmetics; dyes; electrophoresis; emulsions; fluorescence; high pressure treatment; medicine; microalgae; protein structure; texture; turbidity; yields
Abstract:
... High hydrostatic pressure (HHP) treatments are trending as “green” stabilization and extraction process. The extraction of B-phycoerythrin from microalgae is getting more and more interest due to its numerous potentialities in foods, cosmetics and medicine. Thus, the effects of high pressure on the structural characteristics of B-phycoerythrin extracted from Porphyridium cruentum are explored in t ...
DOI:
10.1016/j.ifset.2019.102226

24. Green ultra-high pressure extraction of bioactive compounds from Haematococcus pluvialis and Porphyridium cruentum microalgae

Author:
Mónica Bueno; Rocío Gallego; Angelica M. Chourio; Elena Ibáñez; Miguel Herrero; Marleny D.A. Saldaña
Source:
Innovative food science & emerging technologies 2020 v.66 pp. 102532
ISSN:
1466-8564
Subject:
Haematococcus pluvialis; Porphyridium cruentum; bioactive compounds; carotenoids; dietary supplements; eicosapentaenoic acid; ethanol; ethyl acetate; food science; linoleic acid; microalgae
Abstract:
... Microalgae are considered prolific sources of bioactive compounds that can be useful for nutraceuticals. In this study, the potential of ultra-high pressure extraction (UHPE) for the simultaneous cell disruption and extraction of bioactives from two microalgae species, Haematococcus pluvialis and Porphyridium cruentum, was evaluated. The variables studied to extract carotenoids for H. pluvialis we ...
DOI:
10.1016/j.ifset.2020.102532

25. High-resolution melting analysis for identification of microalgae species

Author:
Daniela Rojo; Manuel Zapata; Alejandro Maureira; Ricardo Guiñez; Cristian Wulff-Zottele; Mariella Rivas
Source:
Journal of applied phycology 2020 v.32 no.6 pp. 3901-3911
ISSN:
0921-8971
Subject:
Botryococcus braunii; Chlamydomonas reinhardtii; Chlorella sorokiniana; Haematococcus pluvialis; Isochrysis galbana; Nannochloropsis; Phaeodactylum tricornutum; Porphyridium cruentum; Scenedesmus obliquus; algology; biodiversity; biotechnology; genes; industrialization; industry; microalgae
Abstract:
... There is great microalgae biodiversity and their rediscovery as an inexhaustible source of biotechnological resources for all types of applications is leading to the already demonstrated benefits of their bioactive compounds which has boosted their industrial development. For this development, it is essential to have available technologies to easily control large-scale cultures. In this study, a h ...
DOI:
10.1007/s10811-020-02240-y

26. Lipid and unsaturated fatty acid productions from three microalgae using nitrate and light-emitting diodes with complementary LED wavelength in a two-phase culture system

Author:
So Hee Kim; In Yung Sunwoo; Hee Jun Hong; Che Clovis Awah; Gwi-Taek Jeong; Sung-Koo Kim
Source:
Bioprocess and biosystems engineering 2019 v.42 no.9 pp. 1517-1526
ISSN:
1615-7591
Subject:
Chlorella vulgaris; Pavlova lutheri; Porphyridium cruentum; biomass production; color; docosahexaenoic acid; eicosapentaenoic acid; light emitting diodes; microalgae; nitrates; wavelengths
Abstract:
... In this study, Pavlova lutheri, Chlorella vulgaris, and Porphyridium cruentum were cultured using modified F/2 media in a 1 L flask culture. Various nitrate concentrations were tested to determine an optimal nitrate concentration for algal growth. Subsequently, the effect of light emitted at a specific wavelength on biomass and lipid production by three microalgae was evaluated using various wavel ...
DOI:
10.1007/s00449-019-02149-y

27. Comparison of microalgal biomasses as functional food ingredients: Focus on the composition of cell wall related polysaccharides

Author:
Tom M.M. Bernaerts; Lore Gheysen; Clare Kyomugasho; Zahra Jamsazzadeh Kermani; Stéphanie Vandionant; Imogen Foubert; Marc E. Hendrickx; Ann M. Van Loey
Source:
Algal research 2018 v.32 pp. 150-161
ISSN:
2211-9264
Subject:
Arthrospira platensis; Chlorella vulgaris; Nannochloropsis; Phaeodactylum tricornutum; Porphyridium cruentum; Schizochytrium; Tetraselmis chuii; biomass; cell walls; functional foods; ingredients; lipids; microalgae; monosaccharides; polysaccharides; proteins; sulfates; uronic acids
Abstract:
... Microalgae are rich in several nutritional and health-beneficial components, showing great potential as functional food ingredients. To this extent, knowledge of the biomass composition is essential in the selection of suitable microalgae species for specific food applications. Surprisingly, although cell wall polysaccharides are generally reported to play a role in functionality, limited attentio ...
DOI:
10.1016/j.algal.2018.03.017

28. Concentration and purification of Porphyridium cruentum exopolysaccharides by membrane filtration at various cross-flow velocities

Author:
Rafik Balti; Romain Le Balc’h; Nicolas Brodu; Marthe Gilbert; Benjamin Le Gouic; Sophie Le Gall; Corinne Sinquin; Anthony Massé
Source:
Process biochemistry 2018 v.74 pp. 175-184
ISSN:
1359-5113
Subject:
Porphyridium cruentum; ceramics; dry matter content; exopolysaccharides; microfiltration; proteins; rheological properties; salts; sugars
Abstract:
... Exopolysaccharides (EPS) from cell-free Porphyridium cruentum media were concentrated then purified (diafiltration) on a 0.14 μm ceramic membrane. The influence of cross-flow velocities on filtration performances was investigated. Mean permeate fluxes equal to 49.8, 68.9 and 81.9 L h⁻¹. m⁻² were obtained during the concentration at 4 bars for respectively cross-flow velocities inside the membrane ...
DOI:
10.1016/j.procbio.2018.06.021

29. Effects of nitrogen and phosphorous stress on the formation of high value LC-PUFAs in Porphyridium cruentum

Author:
Hao Hu; Hou-Feng Wang; Lin-Lin Ma; Xiao-Fei Shen; Raymond Jianxiong Zeng
Source:
Applied microbiology and biotechnology 2018 v.102 no.13 pp. 5763-5773
ISSN:
0175-7598
Subject:
Porphyridium cruentum; arachidonic acid; biodiesel; eicosapentaenoic acid; fatty acid composition; linoleic acid; nitrogen; phosphorus; starvation; wastewater
Abstract:
... This study systematically examined the effect of nitrogen and phosphorous stress on the formation of linoleic acid (LA), arachidonic acid (ARA), and eicosapentaenoic acid (EPA) in Porphyridium cruentum gy-h56. P. cruentum was cultivated in six different media conferring different conditions of nitrogen (N) sufficiency/deprivation and phosphorous (P) sufficiency/limitation/deprivation. Over a 16-da ...
DOI:
10.1007/s00253-018-8943-3

30. Effects of nitrogen source and irradiance on Porphyridium cruentum

Author:
M. del Pilar Sánchez-Saavedra; Fátima Y. Castro-Ochoa; Viridiana Margarita Nava-Ruiz; Duahmet A. Ruiz-Güereca; Ana Laura Villagómez-Aranda; Fabián Siqueiros-Vargas; Ceres A. Molina-Cárdenas
Source:
Journal of applied phycology 2018 v.30 no.2 pp. 783-792
ISSN:
0921-8971
Subject:
Porphyridium cruentum; ammonium; aquaculture; ash content; carbohydrates; carotenes; chlorophyll; electron transfer; functional foods; industry; light intensity; lipids; nitrates; nitrogen; photons; photosynthesis; phycocyanin; phycoerythrin; proximate composition
Abstract:
... We determined the effects of two nitrogen sources (ammonium and nitrate) and two irradiance levels (50 and 200 μmol photons m⁻² s⁻¹) on the growth rate, cell size, proximate composition, pigment content, and photosynthesis of the unicellular red alga, Porphyridium cruentum. Irradiance significantly affects growth rate, as well as carbohydrate, protein, and phycoerythrin content. Nitrogen form sign ...
DOI:
10.1007/s10811-017-1284-2

31. Evaluation of the effect of agitation speed on the growth and high‐value LC‐PUFA formation of Porphyridium cruentum based on basic rheological analysis

Author:
Hao Hu; Hou‐Feng Wang; Jia‐Yun Li; Lin‐Lin Ma; Xiao‐Fei Shen; Raymond J Zeng
Source:
Journal of chemical technology and biotechnology 2019 v.94 no.7 pp. 2158-2166
ISSN:
0268-2575
Subject:
Porphyridium cruentum; agitation; arachidonic acid; biomass; eicosapentaenoic acid; fatty acid composition; high-value products; hydrodynamics; linoleic acid; microalgae; models; viscosity
Abstract:
... BACKGROUND: The selection of hydrodynamic properties of microalgae such as agitation speed is usually done according to empirical values without a technical basis, and the selected agitation speeds are not consistent with each other in many references. In this study, we aimed to provide a possible technical basis for the setup of the agitation speed of microalgae suspensions based on basic rheolog ...
DOI:
10.1002/jctb.5996

32. Ex situ and in situ investigation of protein/exopolysaccharide complex in Porphyridium cruentum biomass resuspension

Author:
Thierry Tran; Céline Lafarge; Pascale Winckler; Rémi Pradelles; Nathalie Cayot; Camille Loupiac
Source:
Algal research 2019 v.41 pp. 101544
ISSN:
2211-9264
Subject:
Porphyridium cruentum; algae; biomass; chloroplasts; confocal laser scanning microscopy; exopolysaccharides; extracellular matrix; fluorescence; fluorescence microscopy; high pressure treatment; ionic strength; models; pH; phycobiliprotein; sodium chloride
Abstract:
... During the extraction processes of B-phycoerythrin from P. cruentum, the possibility of the occurrence of extraction-inhibiting B-phycoerythrin/exopolysaccharide (EPS) complexes was highlighted. The use of confocal laser scanning microscopy allowed the observation of the cells including their sheath and their chloroplast, the bound EPS matrix, and extracellular vesicles involving phycobiliproteins ...
DOI:
10.1016/j.algal.2019.101544

33. Molecular and rheological characterization of different cell wall fractions of Porphyridium cruentum

Author:
Tom M.M. Bernaerts; Clare Kyomugasho; Noor Van Looveren; Lore Gheysen; Imogen Foubert; Marc E. Hendrickx; Ann M. Van Loey
Source:
Carbohydrate polymers 2018 v.195 pp. 542-550
ISSN:
0144-8617
Subject:
Porphyridium cruentum; aqueous solutions; cell walls; commercialization; galactose; gels; glucose; glucuronic acid; hydrocolloids; microalgae; molecular weight; polymers; polysaccharides; sulfates; thickeners; viscosity; water solubility; xylose
Abstract:
... Cell wall related polysaccharides of the red microalga Porphyridium sp. were shown to be a promising source of new sustainable thickening agents. Isolated extracellular polysaccharides (EPS) consisted of high molecular weight polymers, showing a higher intrinsic viscosity compared to several commercially used hydrocolloids. Aqueous solutions of EPS (2% w/w) were characterized by substantial viscos ...
DOI:
10.1016/j.carbpol.2018.05.001

34. Pulsed electric field permeabilization and extraction of phycoerythrin from Porphyridium cruentum

Author:
Juan M. Martínez; Carlota Delso; Ignacio Álvarez; Javier Raso
Source:
Algal research 2019 v.37 pp. 51-56
ISSN:
2211-9264
Subject:
Porphyridium cruentum; autolysis; biomass; cell membranes; dissociation; electric field; electroporation; microalgae; permeability; phycoerythrin; pulsed electric fields
Abstract:
... This paper assesses the extraction of β-phycoerythrin (BPE) into aqueous media by the application of pulsed electric field treatments (PEF) to the fresh biomass of Porphyridium cruentum.An increase in electric field strength from 2 to 10 kV/cm, or a prolongation of treatment time increased electroporation and inactivation of P. cruentum in the range investigated (2–10 kV/cm; 30–150 μs). A perfect ...
DOI:
10.1016/j.algal.2018.11.005

35. A simple method for rapid purification of phycobiliproteins from Arthrospira platensis and Porphyridium cruentum biomass

Author:
Rosaria Lauceri; Graziella Chini Zittelli; Giuseppe Torzillo
Source:
Algal research 2019 v.44 pp. 101685
ISSN:
2211-9264
Subject:
Arthrospira platensis; Porphyridium cruentum; algae; ammonium sulfate; biomass; chromatography; freeze drying; hydrophilicity; microfiltration; phycocyanin; protein binding; purification methods; thermoplastics; ultrafiltration
Abstract:
... Membrane chromatography was exploited to purify allophycocyanin, phycocyanin and B-phycoerythrin from aqueous extracts of fresh or freeze-dried biomass of Arthrospira platensis (Cyanobacteria) and Porphyridium cruentum (Rhodophyta). The method can be tuned to obtain products having various degree of purity and avoids expensive and time consuming column chromatography and ultrafiltration steps. A c ...
DOI:
10.1016/j.algal.2019.101685

36. Comparison of red microalgae (Porphyridium cruentum) culture conditions for bioethanol production

Author:
Ho Myeong Kim; Chi Hoon Oh; Hyeun-Jong Bae
Source:
Bioresource technology 2017 v.233 pp. 44-50
ISSN:
0960-8524
Subject:
Porphyridium cruentum; biofuels; biomass; enzymatic hydrolysis; ethanol; ethanol production; fermentation; freshwater; fuel production; glucose; hydrolysates; hydrolysis; microalgae; saccharification; seawater
Abstract:
... Microalgae biomass are useful resources in biofuel production. The objective of this study was to evaluate bioethanol production in response to Porphyridium cruemtum culture conditions. Enzymatic hydrolysis of seawater P. cruemtum (SPC) and freshwater P. cruemtum (FPC, 1% substrate loading, w/v) resulted in glucose conversion yields of 89.8 and 85.3%, respectively, without any pretreatment. Howeve ...
DOI:
10.1016/j.biortech.2017.02.040

37. Connecting color with assembly in the fluorescent B‐phycoerythrin protein complex

Author:
Aneika C. Leney; Aline Tschanz; Albert J. R. Heck
Source:
FEBS journal 2018 v.285 no.1 pp. 178-187
ISSN:
1742-464X
Subject:
Porphyridium cruentum; biotechnology; color; economic impact; flow cytometry; fluorescence; fluorescence emission spectroscopy; fluorescence microscopy; fluorescent dyes; food coloring; industry; mass spectrometry; phycoerythrin
Abstract:
... Phycoerythrin is the major light‐harvesting pigment protein in red algae and is nowadays widely used as a fluorescent probe in biotechnological applications such as flow cytometry and immunofluorescence microscopy. In addition, it has had substantial economic impact due to its potential as a natural food colorant. However, knowledge on the precise molecular composition of phycoerythrin is limited. ...
DOI:
10.1111/febs.14331

38. Enhanced production of fatty acids in three strains of microalgae using a combination of nitrogen starvation and chemical inhibitors of carbohydrate synthesis

Author:
Seong-Joo Hong; Yong Sung Park; Mi-Ae Han; Z.-Hun Kim; Byung-Kwan Cho; Hookeun Lee; Hyung-Kyoon Choi; Choul-Gyun Lee
Source:
Biotechnology and bioprocess engineering 2017 v.22 no.1 pp. 60-67
ISSN:
1226-8372
Subject:
Dunaliella tertiolecta; Nannochloropsis; Porphyridium cruentum; acetic acid; biochemical pathways; biodiesel; biosynthesis; carbohydrate content; carbon; chemical inhibitors; cyclohexanes; fatty acid composition; fatty acids; hydrogen; microalgae; nitrogen; starvation
Abstract:
... Microalgae are attracting much attention as superior biodiesel producers. In particular, under stressful conditions, they accumulate organic compounds consisting entirely of carbon and hydrogen. The aim of this work was to increase intracellular fatty acid content in Dunaliella tertiolecta (Chlorophyceae), Nannochloropsis oculata (Eustigmatophyceae), and Porphyridium cruentum (Rhodophyceae) using ...
DOI:
10.1007/s12257-016-0575-9

39. Feasibility of attached cultivation for polysaccharides production by Porphyridium cruentum

Author:
Giovanni Antonio Lutzu; Lanlan Zhang; Zhaohui Zhang; Tianzhong Liu
Source:
Bioprocess and biosystems engineering 2017 v.40 no.1 pp. 73-83
ISSN:
1615-7591
Subject:
Porphyridium cruentum; aeration; biomass; carbon dioxide; energy use and consumption; exopolysaccharides; light intensity; lighting; methodology; microalgae; mixing; nutrition; photobioreactors; pigments; ponds; viscosity
Abstract:
... Porphyridium cruentum is one of the most valued microalgae species able to produce both pigments and exopolysaccharides. Conventional liquid suspended cultivation in ponds and photobioreactors show its disadvantages in lower cultivation efficiency and higher stirring power consumption due to the high viscosity of the medium by the accumulation of polysaccharides. In this work, a new method of cult ...
DOI:
10.1007/s00449-016-1676-8

40. Impact of different sequences of mechanical and thermal processing on the rheological properties of Porphyridium cruentum and Chlorella vulgaris as functional food ingredients

Author:
Tom M. M. Bernaerts; Agnese Panozzo; Katrien A. F. Verhaegen; Lore Gheysen; Imogen Foubert; Paula Moldenaers; Marc E. Hendrickx; Ann M. Van Loey
Source:
Food & function 2018 v.9 no.4 pp. 2433-2446
ISSN:
2042-650X
Subject:
Chlorella vulgaris; Porphyridium cruentum; bioavailability; biomass; enriched foods; functional foods; gel strength; gelation; heat treatment; homogenization; ingredients; microalgae; nutritive value; polymers; solubilization; viscosity
Abstract:
... Microalgae are a promising and sustainable source for enhancing the nutritional value of food products. Moreover, incorporation of the total biomass might contribute to the structural properties of the enriched food product. Our previous study demonstrated the potential of Porphyridium cruentum and Chlorella vulgaris as multifunctional food ingredients, as they displayed interesting rheological pr ...
DOI:
10.1039/c8fo00261d

41. Chemical Characterization of Six Microalgae with Potential Utility for Food Application

Author:
Ângelo Paggi Matos; Rafael Feller; Elisa Helena Siegel Moecke; José Vladimir de Oliveira; Agenor Furigo Junior; Roberto Bianchini Derner; Ernani Sebastião Sant’Anna
Source:
The journal of the American Oil Chemists' Society 2016 v.93 no.7 pp. 963-972
ISSN:
0003-021X
Subject:
foods; fatty acid composition; Arthrospira platensis; palmitic acid; dietary supplements; carbohydrates; Porphyridium cruentum; long chain polyunsaturated fatty acids; freshwater; triacylglycerols; Phaeodactylum tricornutum; gamma-linolenic acid; proteins; docosahexaenoic acid; eicosapentaenoic acid; Nannochloropsis; alpha-linolenic acid; food industry; arachidonic acid; microorganisms; nutritive value; Chlorella vulgaris; microalgae
Abstract:
... Microalgae contain high levels of proteins, carbohydrates, and lipids, and have found a useful application in enhancing the nutritional value of foods. These organisms can also synthesize long-chain fatty acids in the form of triacylglycerols, such as α-linolenic acid (ALA), eicosapentaenoic acid (EPA), docosahexaenoic acid (DHA), linolenic acid (LA), γ-linolenic acid (GLA) and arachidonic acid (A ...
DOI:
10.1007/s11746-016-2849-y

42. Microalgal biomass as a (multi)functional ingredient in food products: Rheological properties of microalgal suspensions as affected by mechanical and thermal processing

Author:
Tom M.M. Bernaerts; Agnese Panozzo; Veerle Doumen; Imogen Foubert; Lore Gheysen; Koen Goiris; Paula Moldenaers; Marc E. Hendrickx; Ann M. Van Loey
Source:
Algal research 2017 v.25 pp. 452-463
ISSN:
2211-9264
Subject:
microstructure; microalgae; foods; storage modulus; blood serum; Nannochloropsis; viscosity; exopolysaccharides; Schizochytrium; pasteurization; gels; Arthrospira platensis; Phaeodactylum tricornutum; ingredients; Chlorella vulgaris; Porphyridium cruentum; biomass; homogenization
Abstract:
... Microalgae show great potential for use as novel ingredients in food products, as they are rich in several nutritional and health-beneficial components. However, addition of total microalgal biomass might alter the structural properties of the food system. Therefore, information is required about their rheological characteristics towards selection of microalgae species for specific food products. ...
DOI:
10.1016/j.algal.2017.05.014

43. Rapid analysis and quantification of major neutral lipid species and free fatty acids by HPLC‐ELSD from microalgae

Author:
Florentin Donot; Caroline Strub; Angélique Fontana; Nicolas Jouy; Christelle Delbes; Ziya Gunata; Sabine Schorr‐Galindo
Source:
European journal of lipid science and technology 2016 v.118 no.10 pp. 1550-1556
ISSN:
1438-7697
Subject:
screening; microalgae; detection limit; light scattering; bioprocessing; diacylglycerols; free fatty acids; hydrocarbons; Botryococcus braunii; high performance liquid chromatography; biochemical pathways; algae culture; carbon; rapid methods; Arthrospira platensis; biofuels; triacylglycerols; Chlorella vulgaris; Porphyridium cruentum
Abstract:
... A method based on normal‐phase high performance liquid chromatography combined with evaporative light‐scattering detector was developed to quantify major neutral lipids from microalgae. A binary gradient enabled a good resolution of hydrocarbons and major neutral lipids by classes in less than 13 min. A good linearity was observed from 0.9 to 30 μg. Limits of detection (LOD) and quantification (LO ...
DOI:
10.1002/ejlt.201500545

44. Supramolecular architecture of photosynthetic membrane in red algae in response to nitrogen starvation

Author:
Long-Sheng Zhao; Hai-Nan Su; Kang Li; Bin-Bin Xie; Lu-Ning Liu; Xi-Ying Zhang; Xiu-Lan Chen; Feng Huang; Bai-Cheng Zhou; Yu-Zhong Zhang
Source:
Biochimica et biophysica acta 2016 v.1857 no.11 pp. 1751-1758
ISSN:
0005-2728
Subject:
Cyanobacteria; Porphyridium cruentum; algae; autotrophs; nitrogen; photosynthesis; phycobilisome; starvation; thylakoids
Abstract:
... The availability of nitrogen is one of the most important determinants that can limit the growth of photosynthetic organisms including plants and algae; however, direct observations on the supramolecular architecture of photosynthetic membranes in response to nitrogen stress are still lacking. Red algae are an important evolutionary group of algae which contain phycobilisomes (PBSs) on their thyla ...
DOI:
10.1016/j.bbabio.2016.08.005

45. Phytochemical profiles of marine phytoplanktons: an evaluation of their in vitro antioxidant and anti-proliferative activities

Author:
Jim Jun-Hui Huang; Wen-Wen Xu; Shao-Ling Lin; Peter Chi-Keung Cheung
Source:
Food & function 2016 v.7 no.12 pp. 5002-5017
ISSN:
2042-650X
Subject:
2,2-diphenyl-1-picrylhydrazyl; Chlorophyta; Isochrysis; Nitzschia closterium; Porphyridium cruentum; Synechocystis; acetone; active ingredients; amino acids; antineoplastic agents; antioxidant activity; antioxidants; bioactive compounds; carotenoids; chemical constituents of plants; chlorophyll; functional foods; methanol; microalgae; microorganisms; phytoplankton; pigments; solvents
Abstract:
... Marine microorganisms such as phytoplanktons are a rich resource of bioactive components with antioxidant and anti-proliferative activities that can act as novel functional food ingredients. In this study, the pigment profiles, total mycosporine-like amino acids (MAAs) and total phenolic contents (TPCs) in solvent extracts including 90% acetone and methanol from five marine phytoplanktons includin ...
DOI:
10.1039/c6fo01033d

46. Recovery of nutrients from swine wastewater using ultrafiltration: Applications for microalgae cultivation in photobioreactors

Author:
Heather N. Sandefur; Maryam Asgharpour; Jason Mariott; Emily Gottberg; Jessica Vaden; Marty Matlock; Jamie Hestekin
Source:
Ecological engineering 2016 v.94 pp. 75-81
ISSN:
0925-8574
Subject:
Porphyridium cruentum; algae culture; bacteria; biomass production; bioreactors; fertilizers; heat treatment; lipids; microalgae; nitrogen content; nutrients; phosphorus; swine; ultrafiltration; wastewater
Abstract:
... The large-scale production of microalgae poses a number of challenges, including a costly fertilizer demand. While wastewater provides a concentrated source of nutrients, the presence of biological contaminants and the expense of heat treatment are challenging for large-scale production. The goal of this study was to use ultrafiltration to purify wastewater for use in the cultivation of microalgae ...
DOI:
10.1016/j.ecoleng.2016.05.066

47. Accumulation of Photoassimilatory Products by Phycobiliprotein- Containing Algae with Special Reference to Cyanidium caldarium

Author:
Bruno P. Kremer; Guido B. Feige
Source:
Zeitschrift für Naturforschung 2014 v.34 no.12 pp. 1209-1214
ISSN:
1865-7125
Subject:
Anabaena cylindrica; Chroomonas; Cyanidium caldarium; Gloeotrichia; Hemiselmis; Porphyridium cruentum; Rhodella; Rhodomonas; algae; chemotaxonomy; fructose; glucose; sucrose
Abstract:
... Representatives of phycobiliprotein-containing algae such as Anabaena cylindrica, Anacystis ni- dulans, Gloeotrichia echinulata (Cyanophyceae), Chroomonas spec., Hemiselmis rufescens, Rhodomonas spec. (Cryptophyceae), Porphyridium cruentum, Rhodella violacea (Rhodophyceae) along with the unicellular Cyanidium caldarium (unspecified systematic status) have been investigated for their typical photoa ...
DOI:
10.1515/znc-1979-1221

48. Distribution of Thioredoxins in Cyanobacteria

Author:
Ahlert Schmidt; Ursula s
Source:
Zeitschrift für Naturforschung 2014 v.34 no.12 pp. 1272-1274
ISSN:
1865-7125
Subject:
Porphyridium cruentum; Rhodovulum sulfidophilum; Synechococcus; Thiobacillus denitrificans; photosynthetic bacteria; thioredoxins
Abstract:
... The presence of thioredoxin was demonstrated in 20 strains of cyanobacteria as well as in one phototrophic bacterium Rhodopseudomonas sulfidophila and in Thiobacillus denitrificans. Thioredoxin activity was not found in Cyanophora paradoxa and in Porphyridium cruentum using the thioredoxin-dependent PAPS-sulfotransferase activity from Synechococcus 6301 as assay system. ...
DOI:
10.1515/znc-1979-1234

49. Influence of sulphate on the composition and antibacterial and antiviral properties of the exopolysaccharide from Porphyridium cruentum

Author:
Maria Filomena de Jesus Raposo; Alcina Maria Miranda Bernardo de Morais; Rui Manuel Santos Costa de Morais
Source:
Life sciences 2014 v.101 no.1-2 pp. 56-63
ISSN:
0024-3205
Subject:
Escherichia coli; Porphyridium cruentum; Salmonella Enteritidis; Staphylococcus aureus; Vaccinia virus; Vesiculovirus; antibacterial properties; antiviral properties; bacteria; culture media; exopolysaccharides; microalgae; protein content; rheometers; sulfates; uronic acids; viruses; viscoelasticity; viscosity
Abstract:
... The influence of two culture media and three different concentrations of sulphate in the medium on the growth of two strains of Porphyridium cruentum and on the production, composition and viscoelastic characteristics, and antimicrobial properties of the sulphated exopolysaccharide (EPS) were studied.A Bohlin C50 rheometer was used to evaluate the viscosity and elasticity of the EPS solutions. HSV ...
DOI:
10.1016/j.lfs.2014.02.013

50. Microalgae respond differently to nitrogen availability during culturing

Author:
Liliana G Gigova; Natalia J Ivanova
Source:
Journal of biosciences 2015 v.40 no.2 pp. 365-374
ISSN:
0250-5991
Subject:
aspartate transaminase; glutamate dehydrogenase; physiological state; malate dehydrogenase; starvation; pigmentation; Xanthophyceae; Porphyridium cruentum; metabolism; superoxide dismutase; enzyme activity; antioxidant activity; isozymes; antioxidants; glutathione-disulfide reductase; catalase; nitrogen; Scenedesmus; glutathione peroxidase; microalgae; glutamic acid
Abstract:
... Variations in the exogenous nitrogen level are known to significantly affect the physiological status and metabolism of microalgae. However, responses of red, green and yellow-green algae to nitrogen (N) availability have not been compared yet. Porphyridium cruentum, Scenedesmus incrassatulus and Trachydiscus minutus were cultured in the absence of N in the medium and subsequent resupply of N to t ...
DOI:
10.1007/s12038-015-9510-z