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Biological Aspects and Biotechnological Potential of Microalgae

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Dear Colleagues,

We invite you to submit a manuscript to the Journal of Marine Science and Engineering for a Special issue on the “Biological Aspects and Biotechnological Potential of Microalgae”. Recently, algae have drawn significant attention as a valuable source of biomass that is suitable for many industrial applications. The rising anthropogenic CO₂ levels and ongoing energy crisis have set our priorities high in the search for alternative energy sources, such as third generation biofuel. Furthermore, the high demand for alternative sources of nutrient additives and valuable nutraceutical compounds, such as vitamins, proteins and omega-3 fatty acids, encourages research and development activities in the field of suitable novel algal strains, as well as technological production improvements. Recent advances in biochemistry, molecular biology, recombinant biotechnology, remote- and nano-sensing and related cutting-edge technological solutions have led to new horizons and opportunities for novel industrial applications of microalgae. Authors are encouraged to submit original research articles that cover the areas of algal physiology, ecotoxicology, growth kinetic studies and methodological improvements that contribute to our understanding of algae metabolic pathways and the possibilities of qualitative and quantitative productivity enhancement.

Dr. Maria Blažina
Guest Editor

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Keywords

microalgae physiology
growth kinetics
lipids
vitamins
biomass productivity
bioremediation

Published Papers (2 papers)

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Research

14 pages, 1495 KiB

Open AccessArticle

Effect of Light Wavelength on Biomass, Growth, Photosynthesis and Pigment Content of Emiliania huxleyi (Isochrysidales, Cocco-Lithophyceae)

by Jing Zhang, Falong Liu, Qiaohan Wang, Qingli Gong and Xu Gao

J. Mar. Sci. Eng. 2023, 11(2), 456; https://doi.org/10.3390/jmse11020456 - 20 Feb 2023

Cited by 1 | Viewed by 7897

Abstract

Light wavelength is a critical abiotic factor in modulating the development and pigment accumulation of microalgae. In the present study, we investigated the influences of white, red, blue, yellow, and green light on biomass (cell density), growth (cell diameter and dry weight), net photosynthetic rate, and pigment contents (chlorophyll a, fucoxanthin, and lutein) of the coccolithophore Emiliania huxleyi. The effects of light wavelength change on its cell density and fucoxanthin content were also evaluated. The results showed that blue light significantly stimulated the cell proliferation and photosynthetic activity of E. huxleyi. The cell diameter, dry weight, net photosynthetic rate, and the content of fucoxanthin under red light were significantly greater than under white light. E. huxleyi could not effectively utilize green light and yellow light for growth, photosynthesis, and pigment synthesis. Compared with white, blue, and red light, significantly greater cell density and fucoxanthin content were found under blue light, followed by red light. These findings indicated that light wavelength could significantly affect the growth, photosynthesis, and pigments of E. huxleyi. The combination of blue and red light is likely to be an effective measure to enhance its biomass and fucoxanthin production. Full article

(This article belongs to the Special Issue Biological Aspects and Biotechnological Potential of Microalgae)

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23 pages, 3542 KiB

Open AccessArticle

Optimal Allocation of Biomass Distributed Generators Using Modified Hunger Games Search to Reduce CO₂ Emissions

by Ahmed M. Nassef, Essam H. Houssein, Hegazy Rezk and Ahmed Fathy

J. Mar. Sci. Eng. 2023, 11(2), 308; https://doi.org/10.3390/jmse11020308 - 01 Feb 2023

Cited by 3 | Viewed by 1004

Abstract

Biomass is a renewable energy source because it is contained in organic material such as plants. This paper introduces a modified hunger games search for solving global optimization and biomass distributed generator problems. The hunger search algorithm is a very recent optimization algorithm. Despite its merits, it still needs some modifications. The proposed approach includes a new binary τ-based crossover strategy with satisfaction fulfillment step mechanisms. This new algorithm is designed to improve the original hunger games search algorithm by addressing some of its shortcomings, specifically, in solving problems related to global optimization such as finding the best possible solutions for biomass distributed generators. To assess the power of the new approach, its performance was evaluated on the IEEE CEC’2020 test suite against five recent and competitive algorithms. This comparison process included applying the Wilcoxon sign rank and Friedman statistical tests. Reducing the system losses and enhancing the network’s voltage profile are two main issues in the stability of radial distribution networks. Optimal allocation of biomass distributed generators in radial distribution networks can not only improve their stability but also guarantee good service to the customers. Consequently, this research work suggests an effective strategy based on the proposed approach to produce the optimal positions, sizes, and power factors of the biomass distributed generators in the network. Accordingly, the target is to mitigate the network’s active power loss such that the power flow and the bus voltage have to be maintained at their standard limits. Three distribution networks were considered for validating the superiority of the new proposed algorithm. These networks are the IEEE 33-bus, IEEE 69-bus, and IEEE 119-bus. The obtained results were compared with the gravitational search algorithm, whale optimization algorithm, grey wolf optimizer, Runge Kutta method, and the original hunger search algorithm. The new approach outperformed the other considered approaches in obtaining the optimal parameters, which mitigated the power loss to 11.6300, 5.2291, and 145.489 kW, with loss reduction of 94.49%, 97.68%, and 88.79% for the three networks, respectively. Full article

(This article belongs to the Special Issue Biological Aspects and Biotechnological Potential of Microalgae)

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