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1. A comparison of methods for the non-destructive fresh weight determination of filamentous algae for growth rate analysis and dry weight estimation

Author:
Ross, Michael E.; Stanley, Michele S.; Day, John G.; Semião, Andrea J.C.
Source:
Journal of applied phycology 2017 v.29 no.6 pp. 2925-2936
ISSN:
0921-8971
Subject:
biomass; macroalgae; nitrates; physiology; pressing
Abstract:
... The determination of rates of macroalgal growth and productivity via temporal fresh weight (FW) measurements is attractive, as it does not necessitate the sacrifice of biomass. However, there is no standardised method for FW analysis; this may lead to potential discrepancies when determining growth rates or productivity and make literature comparison problematic. This study systematically assessed ...
DOI:
10.1007/s10811-017-1157-8

2. A nitrogen budget model with a user-friendly interface, to assess water renewal rates and nitrogen limitation in commercial seaweed farms

Author:
Nobre, A. M.; Valente, L. M. P.; Neori, A.
Source:
Journal of applied phycology 2017 v.29 no.6 pp. 3039-3055
ISSN:
0921-8971
Subject:
Ulva; aquaculture industry; aquaculture systems; economic sustainability; farmers; macroalgae; models; nitrogen; planning; surveys; user interface
Abstract:
... Key factors affecting the economic sustainability of any aquaculture industry and in particular the seaweed industry are its ecological interactions and impacts. Understanding these issues requires an extended production analysis and simulation, given the natural variability and dynamics of external factors that affect those interdependencies. As such, making sense of production data is required f ...
DOI:
10.1007/s10811-017-1164-9

3. A novel flat plate air-lift photobioreactor with inclined reflective broth circulation guide for improved biomass and lipid productivity by Desmodesmus subspicatus LC172266

Author:
Eze, Chijioke N.; Ogbonna, James C.; Ogbonna, Innocent O.; Aoyagi, Hideki
Source:
Journal of applied phycology 2017 v.29 no.6 pp. 2745-2754
ISSN:
0921-8971
Subject:
Desmodesmus; biomass; carbon; glucose; glycerol; lipids; liquids; photobioreactors; potato starch; starch; tap water; Nigeria
Abstract:
... The aim of this study was to construct a novel photobioreactor with improved mixing and light supply efficiencies. A 4-L flat panel airlift photobioreactor with inclined broth circulation guide installed in the downcomer column was constructed. The circulation time (θ c) and mixing time (θ ₘ) were determined, using the solid flow follower technique and dye method, respectively. The circulation flu ...
DOI:
10.1007/s10811-017-1153-z

4. Antidiabetic and antioxidant activities of brown and red macroalgae from the Persian Gulf

Author:
Pirian, Kiana; Moein, Soheila; Sohrabipour, Jelveh; Rabiei, Reza; Blomster, Jaanika
Source:
Journal of applied phycology 2017 v.29 no.6 pp. 3151-3159
ISSN:
0921-8971
Subject:
Rhodophyta; Sargassum; alpha-amylase; antioxidant activity; antioxidants; enzyme inhibition; ethyl acetate; inhibitory concentration 50; macroalgae; methanol; noninsulin-dependent diabetes mellitus; solvents; Persian Gulf
Abstract:
... The inhibition of pancreatic α-amylase and the prevention of pancreatic oxidative damage are considered possible strategies for the management of type 2 diabetes. The aim of our study was to evaluate in vitro the antioxidant properties and α-amylase inhibition of ten brown and red macroalgal species from the Persian Gulf. The α-amylase inhibition was tested using the chromogenic dinitrosalicylic a ...
DOI:
10.1007/s10811-017-1152-0

5. Antioxidant properties of whole-cell Spirulina (Arthrospira platensis) powder expressed in olive oil under accelerated storage conditions

Author:
Alavi, Nasireh; Golmakani, Mohammad-Taghi
Source:
Journal of applied phycology 2017 v.29 no.6 pp. 2971-2978
ISSN:
0921-8971
Subject:
Spirulina platensis; algae; alpha-tocopherol; antioxidant activity; antioxidants; bioactive compounds; butylated hydroxytoluene; olive oil; oxidation; oxidative stability; protective effect; storage conditions
Abstract:
... The antioxidant activity of whole-cell Spirulina (Arthrospira platensis) powder was assessed in olive oil at different concentrations of 0.5, 1.0, and 1.5% during accelerated storage. Also, antioxidant activity of Spirulina was compared with that of α-tocopherol and butylated hydroxytoluene (BHT). Spirulina samples exhibited lower primary, secondary, and total oxidation products than the control. ...
DOI:
10.1007/s10811-017-1190-7

6. Aqueous extracts of Ascophyllum nodosum obtained by ultrasound-assisted extraction: effects of drying temperature of seaweed on the properties of extracts

Author:
Moreira, Ramón; Sineiro, Jorge; Chenlo, Francisco; Arufe, Santiago; Díaz-Varela, Diego
Source:
Journal of applied phycology 2017 v.29 no.6 pp. 3191-3200
ISSN:
0921-8971
Subject:
2,2-diphenyl-1-picrylhydrazyl; Ascophyllum nodosum; air drying; antioxidant activity; carbohydrate content; color; drying temperature; freeze drying; macroalgae; milling; particle size; particle size distribution; powders; ultrasonic treatment
Abstract:
... The purpose of this study was to determine the effects of convective air-drying at different temperatures (35, 50, 60 and 75 °C) on the colour and particle size distribution of Ascophyllum nodosum seaweed powders obtained after milling (mesh 500 μm). The antioxidant activity and polyphenolic and carbohydrate content of the aqueous extracts obtained by ultrasound-assisted extraction from air-dried ...
DOI:
10.1007/s10811-017-1159-6

7. Atomic force microscopy (AFM) application to diatom study: review and perspectives

Author:
Luís, Ana T.; Hlúbiková, Daša; Vaché, Véronique; Choquet, Patrick; Hoffmann, Lucien; Ector, Luc
Source:
Journal of applied phycology 2017 v.29 no.6 pp. 2989-3001
ISSN:
0921-8971
Subject:
Amphipleura; atomic force microscopy; image analysis; mechanical properties; microorganisms; mucilages; taxonomy; ultrastructure
Abstract:
... Atomic force microscopy (AFM) allows high image resolution, based on slight differences in surface height and on imaging transparent structures, thus, is an excellent type of microscopy for imaging nano-sized objects, such as diatoms. Currently and since 1992, the number of publications applying AFM on diatom studies has increased significantly. Our study considers different aspects related with A ...
DOI:
10.1007/s10811-017-1177-4

8. A unique, highly variable mitochondrial gene with coding capacity of Heterosigma akashiwo, class Raphidophyceae

Author:
Higashi, Aiko; Nagai, Satoshi; Salomon, Paulo S.; Ueki, Shoko
Source:
Journal of applied phycology 2017 v.29 no.6 pp. 2961-2969
ISSN:
0921-8971
Subject:
Raphidophyceae; coasts; geographical distribution; latitude; mitochondria; mitochondrial genes; mitochondrial genome; open reading frames; phylogeography; poisonous algae; provenance; sequence analysis; transcription (genetics); Brazil; Japan; North America; Singapore
Abstract:
... Information related to geographical distribution and local strain composition is essential to an understanding of the dynamics of harmful algae in the environment. Previously, we identified a highly variable segment on the mitochondrial genome of Heterosigma akashiwo, a bloom-forming noxious unicellular algal species. Here, we assessed the utility of the mitochondrial hypervariable region for the ...
DOI:
10.1007/s10811-017-1142-2

9. Comparison of Scenedesmus acuminatus and Chlorella vulgaris cultivation in liquid digestates from anaerobic digestion of pulp and paper industry and municipal wastewater treatment sludge

Author:
Tao, Ran; Kinnunen, Viljami; Praveenkumar, Ramasamy; Lakaniemi, Aino-Maija; Rintala, Jukka A.
Source:
Journal of applied phycology 2017 v.29 no.6 pp. 2845-2856
ISSN:
0921-8971
Subject:
Chlorella vulgaris; Scenedesmus; ammonium; anaerobic digesters; anaerobic digestion; biofuels; biomass production; biorefining; carbohydrate content; industrial wastewater treatment; liquids; microalgae; municipal wastewater; phosphates; pulp and paper industry; sludge; total suspended solids
Abstract:
... Two microalgae, Chlorella vulgaris and Scenedesmus acuminatus, were batch cultivated separately in two types of diluted liquid digestates. The first digestate (ADPP) was obtained from a mesophilic laboratory digester treating biosludge from a pulp and paper industry wastewater treatment plant. The second digestate (ADMW) was collected from a full-scale mesophilic anaerobic digester treating-mixed ...
DOI:
10.1007/s10811-017-1175-6

10. Competitive adsorption in a ternary system of toxic metals and rare earth elements using Desmodesmus multivariabilis: empirical and kinetic modelling

Author:
Birungi, Z. S.; Chirwa, E. M. N.; Botai, O. J.
Source:
Journal of applied phycology 2017 v.29 no.6 pp. 2899-2910
ISSN:
0921-8971
Subject:
Desmodesmus; adsorption; binding sites; biosorbents; biosorption; cadmium; correlation; desorption; environmental factors; eutrophication; freshwater; lanthanum; metal ions; models; sorption isotherms; thallium; toxicity; wastewater
Abstract:
... The presence of competing metals in industrial wastewater creates problems of selectivity for binding sites during biosorption of cationic metallic species on microbial cell surfaces. For this reason, modelling of adsorption and uptake of multimetal solutions based on observation of performance of single metal species since this neglects the competition for reactive sites typical in multimetal sol ...
DOI:
10.1007/s10811-017-1197-0

11. Competitive algal biosorption of Al3+, Fe3+, and Zn2+ and treatment application of some industrial effluents from Borg El-Arab region, Egypt

Author:
Shaaban, Abd El-Salam M.; Badawy, Reham K.; Mansour, Hoda A.; Abdel-Rahman, Mohamed E.; Aboulsoud, Yasmin I. E.
Source:
Journal of applied phycology 2017 v.29 no.6 pp. 3221-3234
ISSN:
0921-8971
Subject:
Fourier transform infrared spectroscopy; Gelidium; Ulva lactuca; algae; aluminum; aqueous solutions; biomass; biosorption; cell walls; chromium; cobalt; copper; endothermy; industrial effluents; iron; manganese; models; molybdenum; nickel; pH; roughness; scanning electron microscopy; sorption isotherms; temperature; thermodynamics; vanadium; zinc; Egypt
Abstract:
... Three marine algal biomasses, namely Gelidium latifolium (Grev.) Bornet et Thuret, Ulva lactuca Linnaeus and Colpomenia sinuosa (Mertens et Roth) Derbes et Solier, were used in their raw dried forms to biosorb Al³⁺, Fe³⁺, and Zn²⁺ from aqueous solutions. The optimum biosorption conditions were initial element concentration, 1000 mg L⁻¹; temperature, 40 °C; contact time, 1 h; pH, 4, 3, and 6 for Al ...
DOI:
10.1007/s10811-017-1185-4

12. Consumption of carrageenophyte Sarconema filiforme by Platynereis insolita (Polychaeta: Phyllodocida: Nereididae)—laboratory experiments and outplanting

Author:
Ganesan, M.; Monisha, N.
Source:
Journal of applied phycology 2017 v.29 no.6 pp. 3029-3037
ISSN:
0921-8971
Subject:
Nereididae; animals; biomass production; body weight; crop losses; food consumption; grazing intensity; laboratory experimentation; macroalgae
Abstract:
... Laboratory experiments and outplanting were conducted to understand the consumption of the economically important carrageenophyte Sarconema filiforme by the polychaete Platynereis insolita. When S. filiforme was outplanted, the harvested biomass reached its lowest value (0.56 ± 0.12 kg fresh wt m⁻²) when the polychaete density showed its highest abundance (10 individuals per g fresh wt of alga), i ...
DOI:
10.1007/s10811-017-1182-7

13. Coupling a bio-accumulator organism and MALDI-TOF MS: an early warning detection system for microcystins in water bodies

Author:
Lauceri, Rosaria; Austoni, Martina; Caviglia, Francesca; Kamburska, Lyudmila; Lami, Andrea; Morabito, Giuseppe; Pflueger, Valentin; Benavides, Ana Margarita Silva; Tonolla, Mauro; Torzillo, Giuseppe; Riccardi, Nicoletta
Source:
Journal of applied phycology 2017 v.29 no.6 pp. 2979-2988
ISSN:
0921-8971
Subject:
Cyanobacteria; Unio; algal blooms; diodes; drinking water; enzyme-linked immunosorbent assay; freshwater; high performance liquid chromatography; human health; matrix-assisted laser desorption-ionization mass spectrometry; microcystins; monitoring; rapid methods; risk management; surface water; water reservoirs; water supply
Abstract:
... Microcystins produced by freshwater cyanobacteria pose serious threats to human health and are a growing problem in drinking water supplies worldwide. Toxin detection and identification in water reservoirs when cyanobacterial density is still low is a key step to predict harmful algal blooms and to allow the safe use of the resource. For this purpose, developing sensitive and rapid methods of anal ...
DOI:
10.1007/s10811-017-1193-4

14. Crude fucoidan content in two North Atlantic kelp species, Saccharina latissima and Laminaria digitata—seasonal variation and impact of environmental factors

Author:
Bruhn, Annette; Janicek, Tina; Manns, Dirk; Nielsen, Mette Møller; Balsby, Thorsten Johannes Skovbjerg; Meyer, Anne S.; Rasmussen, Michael Bo; Hou, Xiaoru; Saake, Bodo; Göke, Cordula; Bjerre, Anne Belinda
Source:
Journal of applied phycology 2017 v.29 no.6 pp. 3121-3137
ISSN:
0921-8971
Subject:
Laminaria; Saccharina latissima; bioactive properties; biomass; chemical composition; ecotypes; environmental factors; fucoidan; industry; interspecific variation; laboratory experimentation; light intensity; macroalgae; nutrient availability; salinity; seasonal variation; North Sea
Abstract:
... Fucoidans are sulphated fucose-rich polysaccharides predominantly found in the cell walls of brown algae. The bioactive properties of fucoidans attract increasing interest from the medico-pharmaceutical industries and may drive an increase in demand of brown algae biomass. In nature, the biochemical composition of brown algae displays a seasonal fluctuation driven by environmental factors and endo ...
DOI:
10.1007/s10811-017-1204-5

15. Cyclic fractionation process for Saccharina latissima using aqueous chelator and ion exchange resin

Author:
Sterner, Martin; Ribeiro, Mauricio Sodré; Gröndahl, Fredrik; Edlund, Ulrica
Source:
Journal of applied phycology 2017 v.29 no.6 pp. 3175-3189
ISSN:
0921-8971
Subject:
Saccharina latissima; acid deposition; algae; alginates; biomass; cations; chelating agents; energy; fractionation; greenhouse gas emissions; ion exchange resins; life cycle assessment; molecular weight; sodium citrate; solubility; uronic acids; water utilization
Abstract:
... A new approach to process Saccharina latissima algal biomass was developed using sodium citrate and a polyvalent cation-specific resin to sequentially extract the alginate into several usable fractions. The fractionation was performed in a cyclic manner, utilizing a stepwise removal of the native polyvalent ions present in the algae to isolate fractions of alginate with different solubility in the ...
DOI:
10.1007/s10811-017-1176-5

16. Diurnal carbon dioxide exchange rates of Saccharina latissima and Laminaria digitata as affected by salinity levels in Norwegian fjords

Author:
Mortensen, Leiv M.
Source:
Journal of applied phycology 2017 v.29 no.6 pp. 3067-3075
ISSN:
0921-8971
Subject:
Laminaria; Saccharina latissima; brackish water; carbon dioxide; freezing point; freshwater; light intensity; macroalgae; runoff; salinity; salt tolerance; sporophytes
Abstract:
... The Norwegian fjords are strongly influenced by freshwater runoff from the mountain regions as a result of high precipitation. The macroalgae growing in the fjords may therefore be frequently exposed to low salinity levels. This may affect the potential for cultivating kelp in the fjords. In the present study, the sensitivity to salinity levels of 10, 16, 24 or 34‰ was studied by measuring the car ...
DOI:
10.1007/s10811-017-1183-6

17. Ecophysiological traits of various genotypes of a green key alga in biological soil crusts from the semi-arid Colorado Plateau, USA

Author:
Donner, Antje; Ryšánek, David; Mikhailyuk, Tatiana; Karsten, Ulf
Source:
Journal of applied phycology 2017 v.29 no.6 pp. 2911-2923
ISSN:
0921-8971
Subject:
Klebsormidium; algae; arid lands; arid zones; biological soil crusts; ecophysiology; genotype; habitats; microorganisms; photoinhibition; photons; photosystem II; phylogeny; plasticity; plateaus; rehydration; ribulose-bisphosphate carboxylase; temperature; United States
Abstract:
... Biological soil crusts (BSCs) represent a micro-ecosystem consisting of various microorganisms including algae in drylands worldwide. The green algal genus Klebsormidium is a typical member of such communities, and because of its filamentous morphology and sticky cells, it plays an ecological key role in the stabilization of soil surfaces. In the present study, we investigated for the first time t ...
DOI:
10.1007/s10811-017-1158-7

18. Effect of drying and extraction conditions on the recovery of bioactive compounds from Chlorella vulgaris

Author:
Stramarkou, Marina; Papadaki, Sofia; Kyriakopoulou, Konstantina; Krokida, Magdalini
Source:
Journal of applied phycology 2017 v.29 no.6 pp. 2947-2960
ISSN:
0921-8971
Subject:
2,2-diphenyl-1-picrylhydrazyl; Chlorella vulgaris; bioactive compounds; biofuels; biomass; carotenoids; chlorophyll; cosmetics; drugs; ethanol; freeze drying; high performance liquid chromatography; industrial applications; microalgae; microorganisms; protein content; raw materials; solvents; ultraviolet-visible spectroscopy
Abstract:
... Microalgae and especially green algae are microorganisms that are used in a wide range of industrial applications of high economic interest, such as fish farming, food, cosmetics, pharmaceuticals, and biofuel. In this study, the green microalga Chlorella vulgaris was examined as raw material for the recovery of bioactive compounds and the production of multifunctional extracts. Firstly, the drying ...
DOI:
10.1007/s10811-017-1181-8

19. Effect of photoautotrophic and heteroautotrophic conditions on growth and lipid production in Chlorella vulgaris cultured in industrial wastewater with the yeast Rhodotorula glutinis

Author:
Zhang, Kun; Zheng, Jiahui; Xue, Daling; Ren, Difeng; Lu, Jun
Source:
Journal of applied phycology 2017 v.29 no.6 pp. 2783-2788
ISSN:
0921-8971
Subject:
Chlorella vulgaris; Rhodotorula glutinis; biodiesel; biomass; coculture; fatty acid composition; fuel production; microalgae; microbial growth; oleic acid; palmitic acid; wastewater; yeasts
Abstract:
... The photoautotrophic co-culture of Chlorella vulgaris and the yeast Rhodotorula glutinis (MP culture) from industrial wastewater was investigated. Cell numbers, biomass, lipid production, and fatty acid content were measured. Owing to co-culture interaction with yeast and microalgae, the MP culture resulted in the highest number of cells (27.73 × 10⁵ cells mL⁻¹) and biomass (0.808 g L⁻¹). Lipid pr ...
DOI:
10.1007/s10811-017-1168-5

20. Effect of salicylic acid on fatty acid accumulation in Phaeodactylum tricornutum during stationary growth phase

Author:
Xu, Jiahui; Fan, Xiaoji; Li, Xingxing; Liu, Guanfu; Zhang, Zhenyan; Zhu, Youchao; Fu, Zhengwei; Qian, Haifeng
Source:
Journal of applied phycology 2017 v.29 no.6 pp. 2801-2810
ISSN:
0921-8971
Subject:
Phaeodactylum tricornutum; biodiesel; developmental stages; energy; fatty acid composition; fatty acids; fuel production; genes; glycolysis; metabolomics; microalgae; raw materials; salicylic acid; transcription (genetics)
Abstract:
... Microalgae possess great potential for use as raw materials for biofuel production. The marine diatom Phaeodactylum tricornutum accumulates lipids as its major form of energy storage when grown under specific conditions. This study investigated the effects of salicylic acid (SA) on the accumulation of fatty acids in P. tricornutum in the stationary growth phase. Our results showed that 40 μM SA in ...
DOI:
10.1007/s10811-017-1191-6