Influence de la température, de l'intensité lumineuse et du stade de croissance sur la composition biochimique de<i>Chlorella sorokiniana</i>Shihira &amp; Krauss

Belkoura, M.; Benider, Amina; Dauta, A.

doi:10.1051/limn/1997004

Cited by 13 publications

(4 citation statements)

References 43 publications

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“…The values obtained reveal that, due to interspecies variations (Morris, 1981), protein levels can vary from one species to another. Protein content differed also for the same species according to growth phase, in agreement with (Belkoura et al 1997). In the present study, protein levels varied from 45.05% DW during the exponential phase to 25.40% DW in the latent phase for the green algae Scenedesmus protuberans, and from 4.21% DW during the stationary phase to 2.42% DW in the lag phase for the blue-green algae Isocystis sp.…”

Section: Discussionsupporting

confidence: 89%

Growth performance and biochemical composition of nineteen microalgae collected from different Moroccan reservoirs

Abdelkhalek

Mohamed

Mohammed³

et al. 2016

Medit. Mar. Sci.

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Macro- and microalgae have recently received much attention due to their valuable chemical constituents. In order to increase existing data, the authors studied nineteen microalgae species isolated from different reservoirs in the Fez region (northern Morocco), undertaking experiments to determine for each species the specific growth rate, their total amounts of proteins, carbohydrates and lipids and the influence of the growth phase on these chemical constituents. Conditions of cultivation were as follows: light intensity equal to 300 μmol photons m-2 s-1, with a temperature regime of 25/20°C (day/night) and a 16/8 (light/dark) photoperiod cycle. The growth rates of the nineteen studied species of microalgae showed a wide variation between species, ranging from 0.27 g l-1 d-1 for Chlamydomonas ovalis to 3.64 g l-1 d-1 for Chlorococcum wemmeri. Protein, carbohydrate and lipid contents varied greatly between taxa and within genera. Ankistrodesmus falcatus, Chlamydomonas ovalis, Chlorococcum sp., Hyaloraphidium contortum, Scenedesmus protuberans, and Synechocystis aquatilis tended to synthesize proteins, the concentrations exceeding 20% dry weight (DW). Ankistrodesmus falcatus, Ankistrodesmus sp., Chlorococcum wemmeri, Coenocystis sp., Isocystis sp., Lyngbya bergei, Oscillatoria amphibia, Polytoma papillatum, Scenedesmus protuberans, Scenedesmus sp. and Synechocystis aquatilis showed a high capacity for lipid storage, greater than 20% DW. For carbohydrate contents, only Scenedesmus protuberans and Scenedesmus quadricauda showed an excessive level compared to other scanned species with 29.21% and 24.76% DW, respectively.

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Section: Discussionsupporting

confidence: 89%

Growth performance and biochemical composition of nineteen microalgae collected from different Moroccan reservoirs

Abdelkhalek

Mohamed

Mohammed³

et al. 2016

Medit. Mar. Sci.

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“…In particular, according to the authors, the initial purpose for which the use of biofuels was conceived was beneficial, but, unfortunately, the intention to be environmentally friendly at that moment when you see this technology as a potential source of economic resources and mass production produced without assessing the consequences that it will have on a social level. On the other hand, although it has shown a positive effect that the correct use of biofuels or a negative effect that is excessive and irresponsible use, society also affects their application regardless of the consequences, since their needs, priorities and interests will be determined in each social context or region, as the historical context and social development (Belkoura et al, 1997).…”

Section: Discussionmentioning

confidence: 99%

Introduction of Biofuels as a Way of Solving Ecological Problems

Burkhardt

Stepanova

Ratkin

et al. 2021

IJEEP

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Since environmental issues have become a priority for everyone on the planet, and the fact that growing demand for fossil fuels will soon lead to a reduction in world reserves, except for climate change due to their use and greenhouse gas emissions. The aim of this work was to assess the potential for the introduction of biofuels and find the optimal conditions for the enzymatic hydrolysis of Japonica Rice husk. In addition, evaluate the positive and negative consequences because of the use and implementation of this technology. The methodology used variables: substrate FPU, pH, time, temperature and concentration surfactants using the screening construct obtained statistically, all variables are significant. Then an optimization plan was applied for the variables: pH, FPU and time, dropping those with a lower level of significance. Finally, the best conditions found in previous projects were (pH 5.0, 13 h, and 30 FPU/g of substrate); later, these conditions were applied in experiments to assess the effect of an increase in hydrolyzed cellulose. They use 6%; 8% and 10% of pulp is available with a recycling yield of 74%, 42% and 16%. The community has its own interests in the use of biofuels; therefore, this study provides an opportunity for biofuel producers to reduce environmental, economic, and social costs.

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“…The mean protein content under continuous light culture conditions (57% w/w) was lower than that of light-dark regulated cultures with either fixed light intensity (62.5% w/w) or variable light intensity (68%). However, the carbohydrate contents in continuous light cultures were 58% (variable light intensity) and 100% (fixed light intensity) higher than that of the light-dark regulated culture [115][116][117][118][119]. Kim et al cultured Chlorella sp.…”

Section: Lightmentioning

confidence: 99%

Phytoplankton Carbon Utilization Strategies and Effects on Carbon Fixation

Wang

Yin

Chen

et al. 2023

Water

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Phytoplankton have a crucial role in the conversion of greenhouse gas sources and sinks in natural water bodies, such as lakes, rivers, and oceans. In response to environmental changes, phytoplankton adapt by altering their carbon utilization strategies, which affect carbon sequestration rates and carbon fluxes at the water–air interface. This paper classifies and summarizes the main carbon utilization strategies of phytoplankton in terms of carbon acquisition, carbon metabolism, and carbon emission. Their carbon acquisition strategy determines their carbon uptake rate, while their carbon metabolism strategy affects their carbon sequestration potential. Moreover, their carbon emission strategy determines the final net carbon sequestration. A systematic study of phytoplankton carbon utilization strategies is important for the development of phytoplankton-based wastewater treatment technologies, understanding of algal greenhouse gas fixation, and assessment of greenhouse gas sources and sinks in natural water bodies. This article provides a comprehensive understanding of the ecological role of phytoplankton in natural water bodies and offers valuable references for related research. Furthermore, our research sheds light on the carbon metabolism and emission processes of phytoplankton. By analyzing the carbon metabolism and emission of phytoplankton under different carbon utilization strategies, we can more accurately evaluate the impact of phytoplankton on the carbon cycle in natural water bodies, which can contribute to environmental protection and sustainable development.

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Influence de la température, de l'intensité lumineuse et du stade de croissance sur la composition biochimique deChlorella sorokinianaShihira & Krauss

Cited by 13 publications

References 43 publications

Growth performance and biochemical composition of nineteen microalgae collected from different Moroccan reservoirs

Growth performance and biochemical composition of nineteen microalgae collected from different Moroccan reservoirs

Introduction of Biofuels as a Way of Solving Ecological Problems

Phytoplankton Carbon Utilization Strategies and Effects on Carbon Fixation

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