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You searched for: Journal name Algal research Remove constraint Journal name: Algal research Publication year rev 7982-2018 Remove constraint Publication year rev: 7982-2018 Source 2018 v.32 Remove constraint Source: 2018 v.32
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1. Biological stoichiometry of oleaginous microalgal lipid synthesis: The role of N:P supply ratios and growth rate on microalgal elemental and biochemical composition

Author:
Baoyan Gao; Jing Liu; Chengwu Zhang; Dedmer B. Van de Waal
Source:
Algal research 2018 v.32 pp. 353-361
ISSN:
2211-9264
Subject:
Tetradesmus; carbon nitrogen ratio; glycolipids; lipid content; microalgae; nitrogen content; phospholipids; protein content; stoichiometry; triacylglycerols
Abstract:
... Biological Stoichiometry is an ecological framework connecting the balance of elements to the functioning of organisms. Here, we applied this framework to study the relationships between carbon:nitrogen:phosphorus (C:N:P) ratios and synthesis of industrial high value biochemicals in the highly oleaginous alga Tetradesmus bernardii. We expected an increase in protein content with increasing cellula ...
DOI:
10.1016/j.algal.2018.04.019

2. 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

3. Docosahexaenoic acid production by a novel high yielding strain of Thraustochytrium sp. of Indian origin: Isolation and bioprocess optimization studies

Author:
Kabilan Chandrasekaran; Rony K. Roy; Anju Chadha
Source:
Algal research 2018 v.32 pp. 93-100
ISSN:
2211-9264
Subject:
functional foods; lipid content; microalgae; screening; Thraustochytrium; ribosomal RNA; docosahexaenoic acid; bioprocessing; ribosomal DNA; phylogeny; fatty acid methyl esters; urea; heterotrophs; fish; biomass; fluorescence emission spectroscopy; India
Abstract:
... Docosahexaenoic acid [DHA], an important nutraceutical, generally isolated from fish can be derived from a marine heterotroph microalgae of the thraustochytrid family. In this study, strategic screening for a high yielding strain from the mangroves of South India for the production of DHA resulted in a strain which showed promising yields of biomass and DHA. Phylogenetic (18S rRNA) analysis of thi ...
DOI:
10.1016/j.algal.2018.03.011

4. Dynamic response of Synechocystis sp. PCC 6803 to changes in light intensity

Author:
Levi Straka; Bruce E. Rittmann
Source:
Algal research 2018 v.32 pp. 210-220
ISSN:
2211-9264
Subject:
Synechocystis sp. PCC 6803; absorption; biomass; light intensity; microalgae; models; specific growth rate
Abstract:
... With changing light intensities, microalgae exhibit the inter-connected phenomena of photoacclimation, photodamage, and photodamage repair. Together they result in unique growth responses to changes in light intensity. In this work, we experimentally evaluated the growth responses using Synechocystis sp. PCC 6803 subjected to a series of light-step experiments. In these experiments, the biomass de ...
DOI:
10.1016/j.algal.2018.04.004

5. Effect of microalgae addition on active biodegradable starch film

Author:
Mariel Carissimi; Simone Hickmann Flôres; Rosane Rech
Source:
Algal research 2018 v.32 pp. 201-209
ISSN:
2211-9264
Subject:
Dunaliella tertiolecta; antioxidant activity; bio-packaging; biodegradability; biomass; cassava starch; foods; lipid peroxidation; microalgae; modulus of elasticity; opacity; permeability; salmon; solubility; starch; tensile strength; thiobarbituric acid-reactive substances; water content; water vapor
Abstract:
... Despite its great importance, the traditional packaging is produced from non-renewable and non-biodegradable sources, causing several environmental problems. Therefore, biodegradable packaging has been attracting attention and interest from researchers and industries worldwide. This work developed biodegradable films with antioxidant properties, using cassava starch combined with biomass or biomas ...
DOI:
10.1016/j.algal.2018.04.001

6. Effects of air bubble size on algal growth rate and lipid accumulation using fine-pore diffuser photobioreactors

Author:
Zhigang Yang; Haiyan Pei; Fei Han; Yuting Wang; Qingjie Hou; Yang Chen
Source:
Algal research 2018 v.32 pp. 293-299
ISSN:
2211-9264
Subject:
aeration; air; biodiesel; biomass production; bubbles; carbon dioxide; diffusers; droplets; feedstocks; lipid content; lipids; microalgae; microorganisms; photobioreactors; starch; transmission electron microscopes
Abstract:
... Microalgae are a potential feedstock for biodiesel and aeration is a reliable method to improve the growth of microalgae. Previous studies revealed the influence of bubbles on a variety of microorganisms, yet so far few studies have focused on the effects of bubble size on microalgal lipid production. In this study, four different fine-pore diffusers that could produce different bubble sizes were ...
DOI:
10.1016/j.algal.2018.04.016

7. Effects of extracts and isolated molecules of two species of Gracilaria (Gracilariales, Rhodophyta) on early growth of lettuce

Author:
Priscila Torres; Paula Novaes; Luciana Garcia Ferreira; Janaína Pires Santos; Ester Mazepa; Maria Eugênia R. Duarte; Miguel D. Noseda; Fungyi Chow; Deborah Y.A.C. dos Santos
Source:
Algal research 2018 v.32 pp. 142-149
ISSN:
2211-9264
Subject:
Gracilaria caudata; Gracilaria domingensis; algae; hexane; hydrocolloids; lettuce; methanol; methylene chloride; palmitic acid; polysaccharides; sulfates
Abstract:
... Crude extracts using hexane, dichloromethane, methanol, 80% methanol or water of two agarophytes (Gracilaria caudata and Gracilaria domingensis) and their phase partitions were evaluated on early growth of lettuce. Hexane, methanol, 80% methanol and aqueous extracts of G. caudata and dichloromethane and aqueous extracts of G. domingensis were biostimulants. Palmitic acid, the major compound of non ...
DOI:
10.1016/j.algal.2018.03.016

8. Fucoidanase inhibitory activity of phlorotannins from brown algae

Author:
Tatiana I. Imbs; Artem S. Silchenko; Sergey A. Fedoreev; Vladimir V. Isakov; Svetlana P. Ermakova; Tatiana N. Zvyagintseva
Source:
Algal research 2018 v.32 pp. 54-59
ISSN:
2211-9264
Subject:
Costaria costata; Fucus evanescens; algae; aquatic bacteria; enzyme inhibition; enzyme inhibitors; enzymes; mass spectrometry; metabolites; molecular weight; nuclear magnetic resonance spectroscopy; polymerization
Abstract:
... The inhibitors of recombinant fucoidanase FFA2 from the marine bacterium Formosa algae KMM 3553ᵀ were found among the metabolites of brown algae Fucus evanescens and Costaria costata. NMR spectroscopy and mass spectrometry analysis showed that high molecular weight phlorethols (degree of polymerization (DP) of 12–25 monomers) from C. costata (ICc) and fucophloretol (DP = 3) from F. evanescens (IFe ...
DOI:
10.1016/j.algal.2018.03.009

9. How to combine CO2 abatement and starch production in Chlorella vulgaris

Author:
Rafael García-Cubero; José Moreno-Fernández; F.G. Acién-Fernández; Mercedes García-González
Source:
Algal research 2018 v.32 pp. 270-279
ISSN:
2211-9264
Subject:
Chlorella vulgaris; algae; algae culture; biomass production; carbon dioxide; ethanol production; light intensity; lipids; models; nitrogen; pH; pigments; prediction; proteins; starch; temperature; vitamins
Abstract:
... Microalgae production has gained attention in recent years as promising systems for CO₂ abatement as well as a source of proteins, pigments, vitamins, lipids, and carbohydrates. Particularly, starch can be used for bioethanol production in a well-established fermentative process. The aim of this work was to maximize and model biomass productivity and CO₂ assimilation in continuous cultures of Chlo ...
DOI:
10.1016/j.algal.2018.04.006

10. Isolation and evaluation of phytoconstituents from red alga Acanthophora spicifera as potential apoptotic agents towards A549 and HeLa cancer cells lines

Author:
Veeresh Kumar Sali; R. Malarvizhi; V.M. Manikandamathavan; Hannah R. Vasanthi
Source:
Algal research 2018 v.32 pp. 172-181
ISSN:
2211-9264
Subject:
Acanthophora; Fourier transform infrared spectroscopy; Western blotting; algae; antineoplastic activity; apoptosis; autophagy; bioactive compounds; caspases; cell cycle checkpoints; chemical constituents of plants; cytotoxicity; dose response; gas chromatography-mass spectrometry; human cell lines; inhibitory concentration 50; membrane potential; mitochondrial membrane; neoplasm cells; neoplasms; nuclear magnetic resonance spectroscopy; solvents; staining
Abstract:
... In the present work, we isolated, characterized and examined the anticancer effect of bioactive molecules from Acanthophora spicifera (red algae) on A549 and HeLa cancer cell lines and compared with normal HEK cells. Among the different solvent fractions subjected to chromatographic purification, three molecules isolated showed potential cytotoxicity and induced apoptosis in a dose dependent manne ...
DOI:
10.1016/j.algal.2018.02.031

11. Magnetic beads, a particularly effective novel method for extraction of NGS-ready DNA from macroalgae

Author:
Antoine Fort; Michael D. Guiry; Ronan Sulpice
Source:
Algal research 2018 v.32 pp. 308-313
ISSN:
2211-9264
Subject:
DNA; Ulva; alleles; barcoding; genetic variation; high-throughput nucleotide sequencing; macroalgae; magnetism; microsatellite repeats; phylogeny; polymerase chain reaction; polyphenols; polysaccharides; protocols; single nucleotide polymorphism
Abstract:
... Next Generation Sequencing (NGS) technologies allow for the generation of robust information on the genetic diversity of organisms at the individual, species and higher taxon levels. Indeed, the number of single nucleotide polymorphisms (SNPs) detected using next-generation sequencing is order of magnitudes higher than SNPs and/or alleles detected using traditional barcoding or microsatellites. Ho ...
DOI:
10.1016/j.algal.2018.04.015

12. Manipulation of a glycolytic regulator alters growth and carbon partitioning in the marine diatom Thalassiosira pseudonana

Author:
Raffaela Abbriano; Nurcan Vardar; Daniel Yee; Mark Hildebrand
Source:
Algal research 2018 v.32 pp. 250-258
ISSN:
2211-9264
Subject:
Bacillariophyceae; Thalassiosira pseudonana; algae; carbohydrates; carbon; carbon metabolism; eukaryotic cells; gene overexpression; genome; glycolysis; interphase; lipids; phosphofructokinases; photosynthesis; protein content
Abstract:
... The regulation of carbon partitioning in diatoms is key to understanding mechanisms related to their high productivity, and the mechanisms controlling carbon flux towards different metabolic fates are currently not well understood. A unique variant of 6-phosphofructo-2-kinase/fructose 2,6 bisphosphatase (PFK2/F2BP), a regulator of glycolytic flux previously uncharacterized in single-cell photosynt ...
DOI:
10.1016/j.algal.2018.03.018

13. Microalgae harvesting by buoy-bead flotation process using Bioflocculant as alternative to chemical Flocculant

Author:
Xiaotong Zou; Yanpeng Li; Kaiwei Xu; Hao Wen; Zhou Shen; Xiangying Ren
Source:
Algal research 2018 v.32 pp. 233-240
ISSN:
2211-9264
Subject:
Chlorella vulgaris; Scenedesmus obliquus; chitosan; ferric chloride; flocculants; harvesting; mechanism of action; microalgae; zeta potential
Abstract:
... To evaluate the use of bioflocculants as potential alternatives to chemical flocculants in improving the harvesting efficiency of buoy-bead flotation (BBF) process, harvesting experiments for Scenedesmus obliquus (S. obliquus) and Chlorella vulgaris (C. vulgaris) were first carried out by the BBF method combined with pre-flocculation in a bench scale flotation column. Chitosan and ferric chloride ...
DOI:
10.1016/j.algal.2018.04.010

14. Microalgal CO2 capture at extreme pH values

Author:
Jonna Piiparinen; Dorothee Barth; Niels T. Eriksen; Sebastian Teir; Kristian Spilling; Marilyn G. Wiebe
Source:
Algal research 2018 v.32 pp. 321-328
ISSN:
2211-9264
Subject:
Chlamydomonas; Coccomyxa; Euglena gracilis; Phaeodactylum tricornutum; Thalassiosira pseudonana; air; algae culture; bicarbonates; biomass production; carbon; carbon dioxide; microalgae; pH; specific growth rate
Abstract:
... Although algae are often grown at pH values between 6 and 8, shifting to more alkali or acidic conditions may benefit CO₂ delivery to algal cultures. To assess the impact of culture pH on growth rate and uptake of CO₂, we grew three relatively fast growing acidophilic (Coccomyxa sp., Euglena mutabilis and Euglena gracilis) and three alkaliphilic (Thalassiosira pseudonana, Phaeodactylum tricornutum ...
DOI:
10.1016/j.algal.2018.04.021

15. Multi-parametric modelling and kinetic sensitivity of microalgal cells

Author:
Hamzat Tijani; Ali Yuzir; Wan Rosmiza Zana Wan Dagang; Arash Zamyadi; Norhayati Abdullah
Source:
Algal research 2018 v.32 pp. 259-269
ISSN:
2211-9264
Subject:
biomass; carbon; cell proliferation; cognition; environmental factors; light intensity; mass transfer; mathematical models; microalgae; nitrogen; nutrients; phosphorus; photosynthesis; prediction
Abstract:
... Mathematical modelling is a cognitive tool employed to describe the cellular response of microalgal cells to changes in nutrient inputs and other environmental factors. Currently, there exists no accurate model that simultaneously incorporates multi-parametric inputs such as carbon, nitrogen, phosphorus and light intensity as defining parameters for algae life. The main objective of this study is ...
DOI:
10.1016/j.algal.2018.04.009

16. Novel approach for the direct transesterification of fresh microalgal cells via micro-reactor

Author:
Jiao Liu; Xupeng Cao; Yadong Chu; Yuchao Zhao; Peichun Wu; Song Xue
Source:
Algal research 2018 v.32 pp. 38-43
ISSN:
2211-9264
Subject:
biodiesel; biomass; drying; fatty acids; fuel production; mass transfer; microalgae; polyethylene glycol; transesterification
Abstract:
... Transesterification is prevalent in the fatty acid (FA) analysis of lipids, as well as in biodiesel preparation. However, it is very inefficient to obtain the FA composition from microalgal biomass via traditional transesterification. Therefore, to satisfy the demand for rapid FA analysis in microalgal research and to simplify the microalgal biodiesel production process, we developed an approach f ...
DOI:
10.1016/j.algal.2018.03.008

17. Optimising light conditions increases recombinant protein production in Chlamydomonas reinhardtii chloroplasts

Author:
Saskya E. Carrera Pacheco; Ben Hankamer; Melanie Oey
Source:
Algal research 2018 v.32 pp. 329-340
ISSN:
2211-9264
Subject:
Chlamydomonas reinhardtii; algae; autotrophs; chloroplast genes; chloroplasts; gene expression; green fluorescent protein; light intensity; photophase; protein content; protein synthesis; recombinant proteins
Abstract:
... The green alga Chlamydomonas reinhardtii provides a platform for cheap, scalable and safe production of complex proteins. Despite the fact that chloroplast gene expression in photosynthetic organisms is tightly regulated by light, most expression studies have analysed chloroplast recombinant protein production under constant light. Here, the influence of light period and intensity on expression of ...
DOI:
10.1016/j.algal.2018.04.011

18. Pyrolysis of Spirulina maxima: Kinetic modeling and selectivity for aromatic hydrocarbons

Author:
Bárbara L. Simão; José A. Santana Júnior; Bruna M.E. Chagas; Cássia R. Cardoso; Carlos H. Ataíde
Source:
Algal research 2018 v.32 pp. 221-232
ISSN:
2211-9264
Subject:
Bronsted acids; Spirulina maxima; activation energy; active sites; aromatic hydrocarbons; biomass; carbohydrates; catalysts; industry; microalgae; models; pyrolysis; raw materials; temperature; thermogravimetry; value added; zeolites
Abstract:
... Microalgae, such as Spirulina maxima biomass is considered a potential raw material for fast pyrolysis process due to its low-lipid and high-protein contents. Aromatic hydrocarbons, which are widely used in industry, are the main derivatives of protein pyrolysis. In this study, thermogravimetric analyses were performed and activation energy values were identified using three methodologies: Friedma ...
DOI:
10.1016/j.algal.2018.04.007

19. Recovery ratio and quality of an agricultural bio-stimulant and semi-refined carrageenan co-produced from the fresh biomass of Kappaphycus alvarezii with respect to seasonality

Author:
M. Shanmugam; Abhiram Seth
Source:
Algal research 2018 v.32 pp. 362-371
ISSN:
2211-9264
Subject:
Kappaphycus alvarezii; biomass; biorefining; carrageenan; coasts; gel strength; macroalgae; manufacturing; streams; water content; weeds; India
Abstract:
... In general, to date, the majority of cultivated, dried biomass of Kappaphycus spp. has been used for the manufacture of refined (RC) or semi-refined carrageenan (SRC) on a commercial scale. However, the present study was focused on the production of SRC using wet fibrous residue left over after an agricultural bio-stimulant was extracted from the fresh biomass of Kappaphycus alvarezii in the manne ...
DOI:
10.1016/j.algal.2018.04.014

20. Seasonal and depth variations in the chemical composition of cultivated Saccharina latissima

Author:
Sandeep Sharma; Luiza Neves; Jon Funderud; Liv Torunn Mydland; Margareth Øverland; Svein Jarle Horn
Source:
Algal research 2018 v.32 pp. 107-112
ISSN:
2211-9264
Subject:
Saccharina latissima; amino acids; ash content; biomass production; coasts; culture media; feedstocks; fucose; fuels; glucose; harvest date; industry; macroalgae; mannitol; microbial growth; minerals; nitrogen; seaweed culture; uronic acids; xylose
Abstract:
... Sugar kelp (Saccharina latissima) is an abundantly available macroalgae species along the Norwegian coast, and there is currently emerging an industry based on seaweed cultivation. In this study, the biomass growth of cultivated S. latissima deployed in February was studied at cultivation depths of 3 and 8 meters (m) and monitored over the period of May, June, and August. The highest biomass produ ...
DOI:
10.1016/j.algal.2018.03.012