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Auteur : Grafiati
Publié le 10 mars 2023

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1

Drissou, Hidaya, Yassine Ouagajjou et Adil Aghzar. « Ecophysiology of the Mediterranean mussel Mytilus galloprovincialis L ; effect of different microalgae diets and ration on broodstock conditioning ». E3S Web of Conferences 298 (2021) : 03006. http://dx.doi.org/10.1051/e3sconf/202129803006.

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Three diets based on three microalgae species (Tetraselmi ssuecica, Isochrysis galbana, and Chaetoceros calcitrans) and three feeding rations (1%, 2%, and 3%) were used to understand the ecophysiology of the Mediterranean mussel Mytilus galloprovincialis during Broodstock conditioning. Generally, mussels increase their consumption regarding food availability for all diets, and it is evident that the highest consumption was recorded with a feed ratio of 3%. During the study, I. galbana and C. calcitrans strains show the high consumption (1.58 µg. g-1. h–1 ±0.00) and (1.58µg. g-1. h–1 ±0.00) compared with T. suecica (1.542 µg. g-1. h–1 ±0.023) recorded at 3% food ration of monospecific diets. Same results were recorded for ingestion but with great learning for I. galbana in triscpecific diet (0.70 µg. g-1. h–1 ±0.052) compared to C. calcitrans(0.36 µg. g-1. h–1 ±0.037) and T. suecica (0.25 µg. g-1. h–1 ±0.126), respectively.The analysis of ANOVA has shown that both diet and food availability affect significantly the ingestion (F = 30.9, df = 2, p < 0.001 and F = 4.4, df = 6, p < 0.001) during mussel conditioning.
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Park, Bum Soo, Won-Ji Choi, Ruoyu Guo, Hansol Kim et Jang-Seu Ki. « Changes in Free-Living and Particle-Associated Bacterial Communities Depending on the Growth Phases of Marine Green Algae, Tetraselmis suecica ». Journal of Marine Science and Engineering 9, no 2 (8 février 2021) : 171. http://dx.doi.org/10.3390/jmse9020171.

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Bacteria are remarkably associated with the growth of green algae Tetraselmis which are used as a feed source in aquaculture, but Tetraselmis-associated bacterial community is characterized insufficiently. Here, as a first step towards characterization of the associated bacteria, we investigated the community composition of free-living (FLB) and particle-associated (PAB) bacteria in each growth phase (lag, exponential, stationary, and death) of Tetraselmis suecica P039 culture using pyrosequencing. The percentage of shared operational taxonomic units (OTUs) between FLB and PAB communities was substantially high (≥92.4%), but their bacterial community compositions were significantly (p = 0.05) different from each other. The PAB community was more variable than the FLB community depending on the growth phase of T. suecica. In the PAB community, the proportions of Marinobacter and Flavobacteriaceae were considerably varied in accordance with the cell number of T. suecica, but there was no clear variation in the FLB community composition. This suggests that the PAB community may have a stronger association with the algal growth than the FLB community. Interestingly, irrespective of the growth phase, Roseobacter clade and genus Muricauda were predominant in both FLB and PAB communities, indicating that bacterial communities in T. suecica culture may positively affect the algae growth and that they are potentially capable of enhancing the T. suecica growth.
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Moejes, Karin, Reshma Sherif, Simone Dürr, Sheelagh Conlan, Alex Mason et Olga Korostynska. « Real-Time Monitoring of Tetraselmis suecica in A Saline Environment as Means of Early Water Pollution Detection ». Toxics 6, no 4 (28 septembre 2018) : 57. http://dx.doi.org/10.3390/toxics6040057.

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Biological water pollution, including organic pollutants and their possible transportation, via biofouling and ballast water, has the potential to cause severe economic and health impacts on society and environment. Current water pollution monitoring methods are limited by transportation of samples to the laboratory for analysis, which could take weeks. There is an urgent need for a water quality monitoring technique that generates real-time data. The study aims to assess the feasibility of three sensing techniques to detect and monitor the concentrations of the model species Tetraselmis suecica in real-time using eleven samples for each method. Results showed UV-Vis spectrophotometer detected increasing concentration of Tetraselmis suecica with R2 = 0.9627 and R2 = 0.9672, at 450 nm and 650 nm wavelengths, respectively. Secondly, low-frequency capacitance measurements showed a linear relationship with increasing concentration of Tetraselmis suecica at 150 Hz (R2 = 0.8463) and 180 Hz (R2 = 0.8391). Finally, a planar electromagnetic wave sensor measuring the reflected power S11 amplitude detected increasing cell density at 4 GHz (R2 = 0.8019).
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Jo, Qtae, Eun Jung Choy et Doo Won Park. « The Sterolic Properties of Heterotrophic Tetraselmis suecica ». Fisheries and aquatic sciences 7, no 1 (1 mars 2004) : 34–38. http://dx.doi.org/10.5657/fas.2004.7.1.034.

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Paul, Roshni, Alla Silkina, Lynsey Melville, Sri Suhartini et Michael Sulu. « Optimisation of Ultrasound Pretreatment of Microalgal Biomass for Effective Biogas Production through Anaerobic Digestion Process ». Energies 16, no 1 (3 janvier 2023) : 553. http://dx.doi.org/10.3390/en16010553.

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The anaerobic digestion, AD, process presents a solution for sustainable waste management, greenhouse gas mitigation and energy production for growing population needs and requirements. Adopting a biorefinery approach that utilises different feedstock may enhance energy production and support optimisation of the anaerobic digestion process. Algae is a promising feedstock that could be used for energy production via the anaerobic digestion process. Microalgal biomass is rich in carbohydrates and lipids; however, many species of algae exhibit tough cell walls that could also be difficult to digest and may influence or inhibit the efficiency of the AD process. This study concentrated on the comparison of AD remediation of two marine algal biomass species, Tetraselmis suecica and Nannochloropsis oceanica. The two species were pre-treated with an ultrasound technique and compared for their methane production using biochemical methane potential tests. For Tetraselmis, a specific methane production of 0.165 LCH4/KgVS was observed; however, for Nannochloropsis, a value of 0.101 LCH4/KgVS was observed for the samples treated with ultrasound. The BMP results from this study show that among the two micro-algae species tested, Tetraselmis suecica is found to be a better substrate for methane production potential. Contrary to increasing the specific methane production, ultrasound cavitation caused a slight decrease in the specific methane production values for both Nannochloropsis oceanica and Tetraselmis suecica biomass residues. The pre-treatment of the biomass using ultrasound techniques provided comparable results and can be recommended for effective bioenergy production. However, further research is required for the optimisation of the pre-treatment of microalgae and for the integration of microalgal biorefineries for circular economy.
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Kovalev, N. N., S. E. Leskova et E. V. Mikheev. « Evaluation of salicylic acid effect on Tetraselmis suecica growth, biochemical composition and caloric value ». IOP Conference Series : Earth and Environmental Science 981, no 4 (1 février 2022) : 042001. http://dx.doi.org/10.1088/1755-1315/981/4/042001.

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Abstract The microalgae Tetraselmis suecica is widely studied as a potential producer of triglycerides for biofuels production and number of biologically active substances. Artificial cultivation of microalgae is associated with its use as live food for bivalve molluscs cultivation, sea cucumbers and fish. The efficiency of microalgae cultivation depends on many environmental factors and is an economically demanding process. The use of exogenous stimulants - phytohormones, has a significant effect on the growth and cultivated microalgae biochemical parameters. It was shown that salicylic acid in concentrations of 1.0 - 3.8 x 10-8 M stimulated the growth of the Tetraselmis suecica culture. In comparison with the control, the growth of the culture by 415% was noted, with the addition of phytohormone at a concentration of 3.8 x 10-8 M. Under the influence of salicylic acid, the amount of protein increased 3.2 times, protein 1.3 times, and the synthesis of carbohydrates was suppressed. The caloric content of Tetraselmis suecica was determined by biochemical composition differences, which must be taken into account when determining the cultivation strategy for marine invertebrates, since a certain plastic material is required for each stage of metamorphosis. The toxicity of salicylic acid due to its accumulation in the environment is well known. The results obtained in our work will contribute to the expansion of knowledge about the effect of acid on microalgae and the potential for their use for wastewater bioremediation.
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Lee, Jae-Keun, Jun-Hyuk Lim et Tae-Yoon Lee. « Cultivation of Tetraselmis suecica under Different Types of Light Emitting Diodes ». Journal of Environmental Science International 21, no 6 (30 juin 2012) : 757–61. http://dx.doi.org/10.5322/jes.2012.21.6.757.

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Kim, Se Kwon, Hee Guk Byun, Pyo Jam Park et Kyoko Adachi. « Purification and Structure of Antioxidative Substance Derived from Tetraselmis suecica ». Korean Journal of Fisheries and Aquatic Sciences 35, no 2 (1 mars 2002) : 155–61. http://dx.doi.org/10.5657/kfas.2002.35.2.155.

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9

AUSTIN, B., E. BAUDET et M. STOBIE. « Inhibition of bacterial fish pathogens by Tetraselmis suecica ». Journal of Fish Diseases 15, no 1 (janvier 1992) : 55–61. http://dx.doi.org/10.1111/j.1365-2761.1992.tb00636.x.

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10

Hyung, Jun-Ho, Eun-Joo Kim, Seung-Joo Moon, Nam Seon Kang et Jaeyeon Park. « Tetraselmis jejuensis sp. nov. (Chlorodendrophyceae), a Euryhaline Microalga Found in Supralittoral Tide Pools at Jeju Island, Korea ». Plants 10, no 7 (24 juin 2021) : 1289. http://dx.doi.org/10.3390/plants10071289.

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We found the euryhaline microalga, Tetraselmis jejuensis sp. nov., which was adapted to supralittoral tide pools with salinities varying from 0.3–3.1%. Fifteen strains of T. jejuensis were isolated from Daejeong (DJ) and Yongduam (YO), and clonal cultures were established in the laboratory. Morphological characterization revealed that the cells have a compressed shape, four flagella emerging from a depression near the apex in two opposite pairs, a cup-shaped chloroplast containing one pyrenoid surrounded by starch, and eyespot regions not located near the flagellar base. T. jejuensis cells showed distinct characteristics compared to other Tetraselmis species. First, a regular subunit pattern with honeycomb-like structures was predominantly displayed on the surface in the middle of the cell body. Second, the pyrenoid was invaded by both cytoplasmic channels comprising electron-dense material separated from the cytoplasm, and two branches of small cytoplasmic channels (canaliculi) in various directions, which characterize the subgenus Tetrathele. Eyespot regions containing a large number of osmiophilic globules, packed closely together and arranged in subcircular close packing of diverse sizes, were dispersed throughout the chloroplast. In the phylogenetic analysis of small subunit (SSU) rDNA sequences, the 15 strains isolated from DJ and YO separated a newly branched clade in the Chlorodendrophyceae at the base of a clade comprising the T. carteriiformi/subcordiformis clade, T. chuii/suecica clade, and T. striata/convolutae clade. The strains in the diverging clade were considered to belong to the same species. The SSU rDNA sequences of the DJ and YO strains showed a maximum difference of 1.53% and 1.19% compared to Tetraselmis suecica (MK541745), the closest species of the family based on the phylogenetic analysis, respectively. Based on morphological, molecular, and physiological features, we suggest a new species in the genus Tetraselmis named Tetraselmis jejuensis, with the species name “jejuensis” referring to the collection site, Jeju Island, Korea.
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Jo, Wol Soon, Yoo Jin Choi, Hyoun Ji Kim, Byung Hyouk Nam, Sook Hee Hong, Gye An Lee, Sang Wha Lee, Su Yeong Seo et Min Ho Jeong. « Anti-inflammatory effect of microalgal extracts from Tetraselmis suecica ». Food Science and Biotechnology 19, no 6 (décembre 2010) : 1519–28. http://dx.doi.org/10.1007/s10068-010-0216-6.

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12

Kovalev, N. N., S. E. Leskova, E. V. Mikheev, Yu M. Pozdnyakova et R. V. Esipenko. « CULTURAL AND BIOCHEMICAL PARAMETERS OF TWO MICROALGAE, PHAEODACTYLUM TRICORNUTUM AND TETRASELMIS SUECIACA, IN CUMULATIVE CULTURES ». Bulletin оf Kamchatka State Technical University, no 53 (2020) : 54–65. http://dx.doi.org/10.17217/2079-0333-2020-53-54-65.

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A comparative study of cultural and biochemical parameters of two microalgal species, Tetraselmis sueciaca and Phaeodactylum tricornutum, was performed. Cell density in the storage culture was 2.88 million cells per one ml for T. sueciaca and 20.37 million cells per one ml for Ph. tricornutum. As shown, determination of op-tical density of the culture medium is a more objective characteristic of the cumulative culture growth. For T. sueciaca, cell growth rate during the course of experiment made 400% and for Ph. tricornutum – 700%. Dif-ference in the chemical composition of microalgal biomass was revealed. The microalgae did not differ in their energy value. The prospects of cumulative culture of microalgae in mariculture farms are discussed.
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Kermanshahi-pour, Azadeh, Toby J. Sommer, Paul T. Anastas et Julie B. Zimmerman. « Enzymatic and acid hydrolysis of Tetraselmis suecica for polysaccharide characterization ». Bioresource Technology 173 (décembre 2014) : 415–21. http://dx.doi.org/10.1016/j.biortech.2014.09.048.

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14

Laing, Ian, et Concepcion Gil Verdugo. « Nutritional value of spray-dried Tetraselmis suecica for juvenile bivalves ». Aquaculture 92 (janvier 1991) : 207–18. http://dx.doi.org/10.1016/0044-8486(91)90022-y.

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15

Biondi, Natascia, Giulia Cheloni, Enrico Tatti, Francesca Decorosi, Liliana Rodolfi, Luciana Giovannetti, Carlo Viti et Mario R. Tredici. « The bacterial community associated with Tetraselmis suecica outdoor mass cultures ». Journal of Applied Phycology 29, no 1 (14 octobre 2016) : 67–78. http://dx.doi.org/10.1007/s10811-016-0966-5.

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Kovalev, Nikolai Nikolayevich, Svetlana Evgenyevna Leskova, Evgeny Valerevich Mikheev, Yuliya Mihaylovna Pozdnyakova et Roman Vladimirovich Esipenko. « INFLUENCE OF SALICYLIC ACID ON PRODUCTION CHARACTERISTICS AND BIOCHEMICAL PARAMETERS OF TETRASELMIS SUECICA IN ENRICHMENT CULTURE ». Vestnik of Astrakhan State Technical University. Series : Fishing industry 2021, no 1 (17 mars 2021) : 90–99. http://dx.doi.org/10.24143/2073-5529-2021-1-90-99.

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The article considers the use of salicylic acid as a stimulator of microalgae growth. The influence of a wide range of salicylic acid concentrations on the growth dynamics of Tetra-selmis suecica in enrichment culture has been evaluated. Cultivation was carried out in monoculture. An increase in algal biomass was measured by the increasing number of cells counted in each experiment in three Goryaev chambers under a light microscope. The duration of the experiments was 14 days. It is shown that salicylic acid in concentrations of 0.4-1.9 • 10–5 M inhibits the growth of algae. The growth of the control culture has two pronounced peak numbers on 4th and 12th days of the experiment. The introduction of salicylic acid in concentrations of 0.44-1.9 • 10–5 M was accompanied by a change of the growth curves: the maximum number of cells was observed on 12th day of the experiment. A higher concentration of phytohormone (3.75.• 10–5 M) provided an increase in crop density by 414% over 14 days of the experiment. The growth of T. suecica culture in the control group was 332%. The values of the specific growth rate of T. suecica were calculated for different periods of cultivation. After 14 days of the experiment, the biochemical composition of the microalgae biomass was evaluated, which showed stimulation with salicylic acid at a con-centration of 3.75 • 10–5 M carbohydrate accumulation. The high concentration of phytohormone suppressed the accumulation of protein, lipids and chlorophyll in the culture and stimulated the accumulation of carbohydrates. It has been suggested that a possible mechanism for the multidirectional action of salicylic acid is its effect on synthesis and catabolism through inhibition of the synthesis and metabolism of endogenous plant hormones.
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Lee, Kang Hyun, Ye Won Jang, Hansol Kim, Jang-Seu Ki et Hah Young Yoo. « Optimization of Lutein Recovery from Tetraselmis suecica by Response Surface Methodology ». Biomolecules 11, no 2 (28 janvier 2021) : 182. http://dx.doi.org/10.3390/biom11020182.

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Microalgae have been attracting attention as feedstock for biorefinery because they have various advantages, such as carbon fixation, high growth rate and high energy yield. The bioactive compounds and lutein contained in microalgae are known to be beneficial for human health, especially eye and brain health. In this study, in order to improve the recovery of bioactive extracts including lutein from Tetraselmis suecica with higher efficiency, an effective solvent was selected, and the extraction parameters such as temperature, time and solid loading were optimized by response surface methodology. The most effective solvent for lutein recovery was identified as 100% methanol, and the optimum condition was determined (42.4 °C, 4.0 h and 125 g/L biomass loading) by calculation of the multiple regression model. The maximum content of recovered lutein was found to be 2.79 mg/mL, and the ABTS radical scavenging activity (IC50) and ferric reducing antioxidant power (FRAP) value were about 3.36 mg/mL and 561.9 μmol/L, respectively. Finally, the maximum lutein recovery from T. suecica through statistical optimization was estimated to be 22.3 mg/g biomass, which was 3.1-fold improved compared to the control group.
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Quesada-Salas, María Catalina, Guillaume Delfau-Bonnet, Gaëlle Willig, Nils Préat, Florent Allais et Irina Ioannou. « Optimization and Comparison of Three Cell Disruption Processes on Lipid Extraction from Microalgae ». Processes 9, no 2 (17 février 2021) : 369. http://dx.doi.org/10.3390/pr9020369.

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This study reports on the optimization of the operating conditions using response surface methodology and a comparative study of three promising technologies of cell disruption (bead milling, microwaves and ultrasound) to increase the lipid extraction from Nannochloropsis oceanica, Nannochloropsis gaditana and Tetraselmis suecica. Central composite designs were used for the optimization of ultrasound and microwave processes. The performance of the cell disruption processes in breaking down microalgae cells is dependent on the strain of microalgae. Microwaves (91 °C for 25 min) were the most efficient for the recovery of lipids from N. oceanica, reaching a lipid content of 49.0% dry weight. For N. gaditana, ultrasound process (80% of amplitude for 30 min) was the most efficient in terms of lipid recovery (21.7% dry weight). The two aforementioned processes are ineffective in disturbing T. suecica whatever the operating conditions used. Only the bead milling process at low flow feed rate with 0.4 mm zirconia beads made it possible to extract 12.6% dry weight from T. suecica. The fatty acid profiles of N. oceanica and T. suecica are affected by the cell disruption process applied. The calculation of specific energy consumption has shown that this criterion should not be neglected. The choice of the most suitable cell disruption process can be defined according to numerous parameters such as the microalgae studied, the total lipid extracted, the fatty acids sought, or the energy consumption.
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Pérez-Rama, M. « Cadmium removal by living cells of the marine microalga Tetraselmis suecica ». Bioresource Technology 84, no 3 (septembre 2002) : 265–70. http://dx.doi.org/10.1016/s0960-8524(02)00045-7.

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Jung, Joo-Young, Kyochan Kim, Sun-A. Choi, Heewon Shin, Donghyun Kim, Sungchul C. Bai, Yong Keun Chang et Jong-In Han. « Dynamic filtration with a perforated disk for dewatering of Tetraselmis suecica ». Environmental Technology 38, no 24 (mars 2017) : 3102–8. http://dx.doi.org/10.1080/09593330.2017.1290145.

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Piampiano, Elisa, Francesco Pini, Natascia Biondi, Roberta Pastorelli, Luciana Giovannetti et Carlo Viti. « Analysis of microbiota in cultures of the green microalga Tetraselmis suecica ». European Journal of Phycology 54, no 3 (26 juin 2019) : 497–508. http://dx.doi.org/10.1080/09670262.2019.1606940.

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Kawaroe, Mujizat, Tri Prartono, Adriani Sunuddin et Deni Saputra. « Marine Microalgae Tetraselmis suecica as Flocculant Agent of Bio-flocculation Method ». HAYATI Journal of Biosciences 23, no 2 (avril 2016) : 62–66. http://dx.doi.org/10.1016/j.hjb.2015.09.003.

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Nassiri, Youssef, Thomas Ginsburger-Vogel, Jean-Louis Mansot et Jany Wery. « Eels investigation of cadmium and copper in contaminated microalga Tetraselmis suecica ». Biology of the Cell 84, no 3 (1995) : 221. http://dx.doi.org/10.1016/0248-4900(96)89434-2.

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Nassiri, Y. « EELS investigation of cadmium and copper in contaminated microalga tetraselmis suecica ». Biology of the Cell 84, no 3 (1995) : 221. http://dx.doi.org/10.1016/02484-9009(68)94342-.

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Azma, Mojtaba, Rosfarizan Mohamad, Raha Abdul Rahim et Arbakariya B. Ariff. « Improved Protocol for the Preparation of Axenic Culture and Adaptation to Heterotrophic Cultivation ». Open Biotechnology Journal 4, no 1 (8 juillet 2010) : 36–46. http://dx.doi.org/10.2174/1874070701004010036.

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The effectiveness of various physical and chemical methods for the removal of contaminants from the microalgae, Tetraselmis suecica, culture was investigated. The information obtained was used as the basis for the development of improved protocol for the preparation of axenic culture to be adapted to heterotrophic cultivation. Repeated centrifugation and rinsing effectively removed the free bacterial contaminants from the microalgae culture while sonication helped to loosen up the tightly attached bacterial contaminants on the microalgae cells. Removal of bacterial spores was accomplished using a mixture of two antibiotics, 5 mg/mL vancomycine and 10 mg/mL neomycine. Walne medium formulation with natural seawater was preferred for the enhancement of growth of T. suecica. Adaptation of growth from photoautotrophic to heterotrophic conditions was achieved by the repeated cultivation of photoautotrophic culture with sequential reduction in illumination time, and finally the culture was inoculated into the medium containing 10 g/L glucose, incubated in total darkness to obtain heterotrophic cells. Changes in the morphology and composition of T. suecica cells during the adaptation from photoautotrophic to heterotrophic condition, as examined under Transmission Electron Microscope, were also reported.
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Haoujar, Imane, Francesco Cacciola, Jamal Abrini, Domenica Mangraviti, Daniele Giuffrida, Yassine Oulad El Majdoub, Ayoub Kounnoun et al. « The Contribution of Carotenoids, Phenolic Compounds, and Flavonoids to the Antioxidative Properties of Marine Microalgae Isolated from Mediterranean Morocco ». Molecules 24, no 22 (7 novembre 2019) : 4037. http://dx.doi.org/10.3390/molecules24224037.

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This study aimed to investigate the potential of four sea water microalgae, isolated and cultivated at M′diq Bay in Morocco, as a new source of natural antioxidants. These microalgae belong to different classes, including Phaedactylium tricornitum (Bacillariophyceae), Nannochloropsis gaditana (Eustigmatophyceae), Nannochloris sp (Trebouxiophyceae), and Tetraselmis suecica (Chlorodendrophycea). The antioxidant properties were screened by the use of in vitro assays, namely 2,2-difenil-1-picrylhydrazyl, Ferric reducing antioxidant power, and Ferrous ions chelating activity, and compoundidentification was carried out in methanol and acetone extracts of both dried and fresh microalgae biomass by HPLC–PDA–MS analysis. Among the investigated microalgae, Phaedactylium tricornutum was the richest one regarding its carotenoid (especially all-E-fucoxanthin) and phenolic (especially protocatechuic acid) contents, as well as antioxidant activity (65.5%), followed by Nannochloris sp, Tetraselmis suicica, and Nannochloropsis gaditana, with antioxidant activity of 56.8%, 54.9%, and 51.1%, respectively.
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Ohse, Silvana, Roberto Bianchini Derner, Renata Ávila Ozório, Maurício Villela Da Costa Braga, Paulo Cunha, Cláudia Pavan Lamarca et Márcia Estevão Dos Santos. « Produção de biomassa e teores de carbono, hidrogênio, nitrogênio e proteína em microalgas ». Ciência Rural 39, no 6 (septembre 2009) : 1760–67. http://dx.doi.org/10.1590/s0103-84782009000600019.

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O aumento da emissão de CO2 e de outros gases efeito estufa tem gerado debates em nível mundial sobre alterações climáticas e estimulado o desenvolvimento de estratégias mitigadoras. Trabalhos nessa área incluem sequestro de CO2 por meio da produção de microalgas aquáticas. Por essa razão, desenvolveu-se um estudo visando determinar os teores de carbono, hidrogênio, nitrogênio e proteína e a produção de biomassa seca de nove espécies de microalgas marinhas (Nannochloropsis oculata, Thalassiosira pseudonana, Phaeodactylum tricornutum, Isochrysis galbana, Tetraselmis suecica, Tetraselmis chuii Chaetoceros muelleri, Thalassiosira fluviatilis e Isochrysis sp.) e uma de água doce (Chlorella vulgaris), em cultivo autotrófico estacionário com objetivo de identificar as mais produtivas e com maior capacidade de fixação de carbono. O experimento foi desenvolvido em sala de cultivo, na Universidade Federal de Santa Catarina, com iluminação contínua e radiação em torno de 150µmol m-2 s-1, temperatura de 25±2°C, suplementação de ar constante, sendo utilizados erlenmeyers com 800mL de meio de cultura. O delineamento experimental foi de blocos casualizados no tempo com três repetições. As espécies C. vulgaris e T. suecica são menos produtivas. Quando se visa à suplementação alimentar, as espécies C. vulgaris e T. Chuii são consideradas interessantes, uma vez que apresentam altos teores de C, N, H e proteína. As espécies N. Oculata, T. pseudonana e C. vulgaris apresentam altos teores de C, demonstrando alta capacidade de fixação de carbono.
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Meza-Escalante, Edna R., Larissa Lepe-Martinié, Carlos Díaz-Quiroz, Denisse Serrano-Palacios, Luis H. Álvarez-Valencia, Ana Rentería-Mexía, Pablo Gortáres-Moroyoqui et Gabriela Ulloa-Mercado. « Capacity of Marine Microalga Tetraselmis suecica to Biodegrade Phenols in Aqueous Media ». Sustainability 14, no 11 (30 mai 2022) : 6674. http://dx.doi.org/10.3390/su14116674.

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Phenolic compounds are toxic and dangerous to the environment and human health. Although the removal of phenols and their derivatives is very difficult, it has been achieved by applying some biological processes. The capacity of microalga to remove phenolic compounds has been demonstrated; however, few reports of the removal of these compounds in a mixture have been published. The removal of phenol, p-cresol and o-cresol was performed by batch kinetics at 50 and 100 mg L−1, and the simultaneous degradation of phenol, p-cresol and o-cresol was carried out in a mixture at 40 mg L−1 using the marine microalga Tetraselmis suecica. The kinetic study was carried out for 192 h. For concentrations of 50 mg L−1 and 100 mg L−1, phenolic compound consumption efficiencies greater than 100% and 85%, respectively, were obtained, and up to 73.6% removal in the mixture. The results obtained indicate that the marine microalga carries out a process of the oxidation of organic matter and phenolic compounds, mineralizing up to 31.4% to CO2 in the mixture. Biological treatments using the marine microalga T. suecica can be considered feasible to treat effluents with concentrations similar to those of the present study.
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Mendoza Espinoza, Sorayda, Juan Fernando Merino Moya, Carmen Yzásiga Barrera et Mirian Noemi Velásquez Guarniz. « Tasa de remoción de fósforo de aguas marinas mediante el cultivo de Tetraselmis suecica ». Revista Científica PUNKURI 1, no 1 (18 juillet 2021) : 8–18. http://dx.doi.org/10.55155/punkuri.v1i1.5.

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La disposición de fósforo en los océanos es una de las principales causas de contaminación de los ecosistemas marinos, con severos impactos sobre la vida acuática y por lo cual urge desarrollar medidas de mitigación. En este estudio, se evaluó el uso de la microalga Tetraselmis suecica para remover fósforo (P) del agua marina. Se emplearon tratamientos experimentales de 23.03, 44.80, 79.50 y 94.20 mg L-1 de (NH4)2 HPO4 y un control con medio Heussler-Merino (HM). Las unidades de cultivo consistieron de fotobiorreactores (2000 mL) conservados con aireación e iluminación constante. Durante el cultivo, las unidades mantuvieron crecimientos similares, sin embargo, los controles presentaron mayores tasas de crecimiento. Al final del experimento, los porcentajes de remoción disminuyen con el aumento de la concentración del P, con valores de 77.83 % en los controles y 36.20 % en los dosificados con 94.2 mg L-1 de P. Estos resultados demuestran las excelentes posibilidades de utilizar cultivos masivos de T. suecica, para remover el exceso de P del ambiente acuático marino.
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Sas, A. A., A. J. Turki, A. Affan, W. A. Al-Taisan, S. K. Das, S. N. Su et Z. C. Cob. « The influence of temperature and nutrient concentrations on growth rate, biomass, Chlorophyll-a, and biochemical compositions of Tetraselmis suecica (Chlorophyta) ». IOP Conference Series : Earth and Environmental Science 880, no 1 (1 octobre 2021) : 012014. http://dx.doi.org/10.1088/1755-1315/880/1/012014.

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Abstract Microalgae have been got high attention due to its potentiality in aquaculture as live feed, and in industries as ingredients for pharmaceutical, cosmetics, and biofuel industries. The objective of this study was to know the optimum culture condition for profuse growth and biochemical composition of Tetraselmis suecica under two parameters: temperature (20°C, 25°C, and 30°C) and modified F/2 medium nutrients concentrations. Culture of group “A” 20°C was categorized as A1 (F/2 stock solution-A; 0.50 ml. L-1 and F/2 stock solution-B; 0.20 ml. L-1), A2 (F/2 stock solution-A; 1. 00 ml L-1 and F/2 stock solution-B; 0.40 ml. L-1) and A3 (F/2 stock solution-A;1.50 ml. L-1 and F/2 stock solution-B; 0.60 ml. L-1). Cultures in 25°C and 30°C were also categorized as groups “B” 25° C (B1, B2, and B3) and “C” 30°C (C1, C2, and C3), respectively. The culture was done for 2 weeks with L:D cycle of 12:12 by using fluorescent light. The highest biomass production was 0.80, 0.64, and 0.45 gL-1 in C2, B3, and A3, respectively. Biochemical analysis showed that protein; 21.92, 20.83, and 18.68 %, lipid; 10.76, 9.42, and 11.71 %, carbohydrate; 38.51, 37.78, and 41.49 %, ash; 15.89, 15.61, and 13.7 %, and moisture; 14.26, 15.02, and 14.42 % in biomass grown of “A”, “B” and “C” culture group, respectively. From the study, it could be said that T. suecic is a eurythermal and mesotrophic habitant microalga which produce high protein and high carbohydrate in low and high temperature, respectively.
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Lee, Seung-Hong, Dong-Uk Chang, Bae-Jin Lee et You-Jin Jeon. « Antioxidant Activity of Solubilized Tetraselmis suecica and Chlorella ellipsoidea by Enzymatic Digests ». Preventive Nutrition and Food Science 14, no 1 (31 mars 2009) : 21–28. http://dx.doi.org/10.3746/jfn.2009.14.1.021.

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Garcia, E. Suarez, J. J. A. van Leeuwen, C. Safi, L. Sijtsma, L. A. M. van den Broek, M. H. M. Eppink, R. H. Wijffels et C. van den Berg. « Techno-Functional Properties of Crude Extracts from the Green Microalga Tetraselmis suecica ». Journal of Agricultural and Food Chemistry 66, no 29 (5 juillet 2018) : 7831–38. http://dx.doi.org/10.1021/acs.jafc.8b01884.

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Robert, René, Giuliana Parisi, Liliana Rodolfi, Bianca Maria Poli et Mario R. Tredici. « Use of fresh and preserved Tetraselmis suecica for feeding Crassostrea gigas larvae ». Aquaculture 192, no 2-4 (janvier 2001) : 333–46. http://dx.doi.org/10.1016/s0044-8486(00)00456-7.

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Nassiri, Y., J. Wéry, J. L. Mansot et T. Ginsburger-Vogel. « Cadmium Bioaccumulation in Tetraselmis suecica : An Electron Energy Loss Spectroscopy (EELS) Study ». Archives of Environmental Contamination and Toxicology 33, no 2 (1 août 1997) : 156–61. http://dx.doi.org/10.1007/s002449900237.

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Delran, Pauline, Christine Frances, Freddy Guihéneuf, Jérôme Peydecastaing, Pierre-Yves Pontalier et Laurie Barthe. « Tetraselmis suecica biofilm cell destruction by high-pressure homogenization for protein extraction ». Bioresource Technology Reports 21 (février 2023) : 101372. http://dx.doi.org/10.1016/j.biteb.2023.101372.

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Martignier, Agathe, Montserrat Filella, Kilian Pollok, Michael Melkonian, Michael Bensimon, François Barja, Falko Langenhorst, Jean-Michel Jaquet et Daniel Ariztegui. « Marine and freshwater micropearls : biomineralization producing strontium-rich amorphous calcium carbonate inclusions is widespread in the genus <i>Tetraselmis</i> ; (Chlorophyta) ». Biogeosciences 15, no 21 (7 novembre 2018) : 6591–605. http://dx.doi.org/10.5194/bg-15-6591-2018.

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Abstract. Unicellular algae play important roles in the biogeochemical cycles of numerous elements, particularly through the biomineralization capacity of certain species (e.g., coccolithophores greatly contributing to the “organic carbon pump” of the oceans), and unidentified actors of these cycles are still being discovered. This is the case of the unicellular alga Tetraselmis cordiformis (Chlorophyta) that was recently discovered to form intracellular mineral inclusions, called micropearls, which had been previously overlooked. These intracellular inclusions of hydrated amorphous calcium carbonates (ACCs) were first described in Lake Geneva (Switzerland) and are the result of a novel biomineralization process. The genus Tetraselmis includes more than 30 species that have been widely studied since the description of the type species in 1878. The present study shows that many other Tetraselmis species share this biomineralization capacity: 10 species out of the 12 tested contained micropearls, including T. chui, T. convolutae, T. levis, T. subcordiformis, T. suecica and T. tetrathele. Our results indicate that micropearls are not randomly distributed inside the Tetraselmis cells but are located preferentially under the plasma membrane and seem to form a definite pattern, which differs among species. In Tetraselmis cells, the biomineralization process seems to systematically start with a rod-shaped nucleus and results in an enrichment of the micropearls in Sr over Ca (the Sr∕Ca ratio is more than 200 times higher in the micropearls than in the surrounding water or growth medium). This concentrating capacity varies among species and may be of interest for possible bioremediation techniques regarding radioactive 90Sr water pollution. The Tetraselmis species forming micropearls live in various habitats, indicating that this novel biomineralization process takes place in different environments (marine, brackish and freshwater) and is therefore a widespread phenomenon.
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Hotos, George N., Evi Kourelea et Ioannis Fotodimas. « Salinity Tolerance and the Effect of Salinity and Algal Feed on the Demographics of Cultured Harpacticoid Copepods Tisbe holothuriae and Tigriopus sp. from the Messolonghi Lagoon (W. Greece) ». Journal of Marine Science and Engineering 10, no 11 (4 novembre 2022) : 1663. http://dx.doi.org/10.3390/jmse10111663.

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The locally isolated harpacticoid copepods Tigriopus sp. and Tisbe holothuriae were subjected to salinity tolerance experimentation at salinities under and above of 40 ppt, and presented high halotolerances in Tigriopus LC50 (24 h) of 1 ± 4.43 ppt and 132 ± 5.35 ppt, respectively, and in Tisbe of 15 ± 2.41 ppt and 93 ± 3.23 ppt, respectively. Tetraselmis suecica, among other microalgal feeds (Asteromonas gracilis, Rhodomonas salina, Dunaliella salina and Isochrysis galbana), resulted in the higher production of nauplii in Tigriopus and R. salina and D. salina in Tisbe (also close to T. suecica in Tigriopus). The demographics (number of nauplii, egg sacs, completion of hatching) of both copepods, using combinations of salinities in the range of 22–60 ppt and D. salina and R. salina as feeds, exhibited almost the same preference for microalgae but were negatively affected by the salinity of 60 ppt. The present experiments showed that these local copepods that have extreme salinity tolerance and a wide preference for easily cultured microalgae can be used in ecological studies and for mass production as live feed in marine fish hatcheries.
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Kassim, Mohd Asyraf, Tan Kean Meng et Noor Aziah Serri. « Alkaline-assisted Microwave Pretreatment of Tetraselmis suecica Biomass for Fed-batch Enzymatic Hydrolysis ». Journal of Engineering and Technological Sciences 51, no 2 (30 avril 2019) : 272. http://dx.doi.org/10.5614/j.eng.technol.sci.2019.51.2.8.

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Biondi, Natascia, Giulia Cheloni, Liliana Rodolfi, Carlo Viti, Luciana Giovannetti et Mario R. Tredici. « Tetraselmis suecica F&M-M33 growth is influenced by its associated bacteria ». Microbial Biotechnology 11, no 1 (3 novembre 2017) : 211–23. http://dx.doi.org/10.1111/1751-7915.12865.

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Serri, N. A., L. Anbalagan, N. Z. Norafand, M. A. Kassim et MS Abu Mansor. « Preliminary study on the growth of Tetraselmis suecica in centred-light photobioreactor (CLPBR) ». IOP Conference Series : Materials Science and Engineering 716 (11 février 2020) : 012008. http://dx.doi.org/10.1088/1757-899x/716/1/012008.

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Fábregas, J., A. Otero, E. Morales, B. Cordero et M. Patiño. « Tetraselmis suecica cultured in different nutrient concentrations varies in nutritional value to Artemia ». Aquaculture 143, no 2 (juillet 1996) : 197–204. http://dx.doi.org/10.1016/0044-8486(95)01219-2.

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Pati�o, M., E. Vecino, F. Ch�zaro, A. Otero et J. F�bregas. « Productivity and biochemical composition of cyclostat cultures of the marine microalga Tetraselmis suecica ». Applied Microbiology and Biotechnology 43, no 4 (1 août 1995) : 617–21. http://dx.doi.org/10.1007/s002530050460.

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Herold, Clemens, Tasneema Ishika, Emeka G. Nwoba, Stephan Tait, Andrew Ward et Navid R. Moheimani. « Biomass production of marine microalga Tetraselmis suecica using biogas and wastewater as nutrients ». Biomass and Bioenergy 145 (février 2021) : 105945. http://dx.doi.org/10.1016/j.biombioe.2020.105945.

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Go, Sugeun, Seok-Joo Lee, Gwi-Taek Jeong et Sung-Koo Kim. « Factors affecting the growth and the oil accumulation of marine microalgae, Tetraselmis suecica ». Bioprocess and Biosystems Engineering 35, no 1-2 (20 octobre 2011) : 145–50. http://dx.doi.org/10.1007/s00449-011-0635-7.

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Chini Zittelli, Graziella, Liliana Rodolfi, Natascia Biondi et Mario R. Tredici. « Productivity and photosynthetic efficiency of outdoor cultures of Tetraselmis suecica in annular columns ». Aquaculture 261, no 3 (décembre 2006) : 932–43. http://dx.doi.org/10.1016/j.aquaculture.2006.08.011.

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F�bregas, J., M. Pati�o, E. Vecino, F. Ch�zaro et A. Otero. « Productivity and biochemical composition of cyclostat cultures of the marine microalga Tetraselmis suecica ». Applied Microbiology and Biotechnology 43, no 4 (septembre 1995) : 617–21. http://dx.doi.org/10.1007/bf00164763.

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Kassim, Mohd Asyraf, Kawnish Kirtania, David De La Cruz, Nasser Cura, Srikanth Chakravartula Srivatsa et Sankar Bhattacharya. « Thermogravimetric analysis and kinetic characterization of lipid-extracted Tetraselmis suecica and Chlorella sp. » Algal Research 6 (octobre 2014) : 39–45. http://dx.doi.org/10.1016/j.algal.2014.08.010.

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Cid, Angeles, Julio Abalde et Concepción Herrero. « High yield mixotrophic cultures of the marine microalga Tetraselmis suecica (Kylin) Butcher (Prasinophyceae) ». Journal of Applied Phycology 4, no 1 (mars 1992) : 31–37. http://dx.doi.org/10.1007/bf00003958.

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Sánchez-García, Didier, Anayelli Resendiz-Isidro, Thelma Villegas-Garrido, César Flores-Ortiz, Benjamín Chávez-Gómez et Eliseo Cristiani-Urbina. « Effect of nitrate on lipid production by T. suecica, M. contortum, and C. minutissima ». Open Life Sciences 8, no 6 (1 juin 2013) : 578–90. http://dx.doi.org/10.2478/s11535-013-0173-6.

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AbstractMicroalgae are an alternative and sustainable source of lipids that can be used as a feedstock for biodiesel production. Nitrate is a good nitrogen source for many microalgae and affects biomass and lipid yields of microalgae. In this study, the effect of nitrate on cell growth and lipid production and composition in Monoraphidium contortum, Tetraselmis suecica, and Chlorella minutissima was investigated. Nitrate affected the production of biomass and the production and composition of lipids of the three microalgae tested. Increasing the nitrate concentration in the culture medium resulted in increased biomass production and higher biomass productivity. Furthermore, increasing the nitrate concentration resulted in a reduction in lipid content and productivity in M. contortum; however, the opposite effect was observed in T. suecica and C. minutissima cultures. C. minutissima and M. contortum lipids contain high levels of oleic acid, with values ranging from 26 to 45.7% and 36.4 to 40.1%, respectively. The data suggest that because of its high lipid productivity (13.79 mg L−1 d−1) and high oleic acid productivity (3.78 mg L−1 d−1), Chlorella minutissima is a potential candidate for the production of high quality biodiesel.
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Ouagajjou, Yassine, Adil Aghzar, Meriem Ahensal, Nadia Berday et Mohamed Idhalla. « Behavioural pattern in changes to diets and food availability during broodstock conditioning of captive clam Ruditapes decussates ». E3S Web of Conferences 337 (2022) : 03002. http://dx.doi.org/10.1051/e3sconf/202233703002.

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In terms of the nutritional needs, the choice of the appropriate phytoplankton strain is the main criterion during bivalves breeding improvement in captivity. Seven nutritional diets based on tree microalgae species (Chaetoceros calcitrans, Tetraselmis suecica and Pavlova lutheri), and seven feeding rations (0%, 1%, 2%, 3%, 4%, 5% and 6%) were used to assess the nutritional pattern of Ruditapes decussatus during conditioning practices. All regimes have shown the highest ingestion rate at low food availability (1% to 3%) with a leaning to diets based on C. Calcitrans followed by T. suecica and P. lutheri respectively.A significant influence of diets quality on absorption efficiency of phytoplankton was observed for both monospecific and bispecific diets (F = 21.78, p =3.2 10-7 *** and F = 250.09, p= 2.2 10-16 ***respectively). Whereas, low influence of food availability on absorption efficiency among all used rations has been revealed by clams reared under mono, bi and trispecific diets respectively (F = 11,19, p= 1.9 10-7 ***; F = 16,63, p= 1.03 10-9 *** and F = 2.78, p=0.0534ns). Consequently, this study could be handled as a standard protocol for conditioning process in furtherance of yield maximizing and cost minimizing during spat production of bivalves in hatcheries.
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