Sterols in Microalgae

Volkman, John K.

doi:10.1007/978-3-319-24945-2_19

Cited by 48 publications

(44 citation statements)

References 151 publications

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“…A summary of the main classes of microalgae producing campesterol, β-sitosterol and stigmasterol, is given in Table 1. More detailed information concerning the main microalgal producers, are reported in an exhaustive review written by Volkman [29] and in Mimouni et al [30].…”

Section: Production Of Phytosterols By Microalgaementioning

confidence: 99%

“…Phytosterols are essential components of membranes [43], controlling fluidity, permeability or activities of membrane-bound enzymes [44]. In microalgae, there is a wide range of structures due to the great diversity of microalgal classes, genera and species, combined with a long evolutionary history of most microalgae [29]. Some sterols can be restricted to few microalgal classes while others are widespread.…”

Section: Characteristics and Synthesis Of Phytosterolsmentioning

confidence: 99%

“…A large diversity of sterols are found in microalgae. For a review, it can be consulted a very interesting work in this field [29]. The aim of our review is to focus on some phytosterols that are known to have benefits on human health.…”

Section: Characteristics and Synthesis Of Phytosterolsmentioning

confidence: 99%

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Microalgal carotenoids and phytosterols regulate biochemical mechanisms involved in human health and disease prevention

et al. 2019

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HAL is a multidisciplinary open access archive for the deposit and dissemination of scientific research documents, whether they are published or not. The documents may come from teaching and research institutions in France or abroad, or from public or private research centers. L'archive ouverte pluridisciplinaire HAL, est destinée au dépôt et à la diffusion de documents scientifiques de niveau recherche, publiés ou non, émanant des établissements d'enseignement et de recherche français ou étrangers, des laboratoires publics ou privés.

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Section: Production Of Phytosterols By Microalgaementioning

confidence: 99%

Section: Characteristics and Synthesis Of Phytosterolsmentioning

confidence: 99%

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Microalgal carotenoids and phytosterols regulate biochemical mechanisms involved in human health and disease prevention

et al. 2019

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“…It is known that diatoms can synthesize different classes of sterols [30]. In H. coffeaeformis cultures we found the main sterol species to be phytosterols, with cholesterol as a minor component.…”

Section: Discussionmentioning

confidence: 65%

Assessment of Halamphora coffeaeformis Growth and Biochemical Composition for Aquaculture Purposes

Bilbao

Martín

Popovich

et al. 2020

JMSE

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The vast majority of the world's fishery by-products are utilized in the fish farming industry. However, due to the high cost and unsustainability of these by-products, alternative sources must be found. Marine diatoms produce important amounts of fatty acids, sterols, proteins and carbohydrates. In this work, we assessed the nutritional value of Halamphora coffeaeformis at the exponential growth phase, to determine its suitability for aquafeed. The strain was grown in a photobioreactor at 20 • C for 6 days. The production of proteins, lipids and carbohydrates was determined, and essential fatty acid, sterol and amino acid composition was assessed. The highest values of triacylglycerides (TAG), free and esterified sterols, proteins and carbohydrates were found after 6 days of growth in the photobioreactor. Fatty acid analysis by gas chromatography showed the presence of eicosapentaenoic (EPA) and arachidonic (ARA) in amounts similar to those for fish oils. In terms of sterols, a predominance of stigmasterol was observed, followed by cholesterol. The amino acid composition revealed 50% of them to be among those essential for fish and other aquatic animals. Finally, a suitable amount of carbohydrates was found in H. coffeaeformis cultures. Together, these findings support the use of H. coffeaeformis as an alternative and sustainable source for aquafeed to partially replace the use of fishery by-products.

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“…Drilling and seismic data are mostly used to characterize tectonic activity and sedimentary history, preservation conditions, and water properties (Demaison & Moore, 1980;Glenn & Kelts, 1991;Garcés et al, 1995;Huang et al, 2013;Moldowan, Sundararaman, & Schoell, 1986). Similarly, geochemical parameters and microfossil data can also record information about palaeoclimate, the supply of organic matter, and preservation conditions (Barron, 1990;Berger, Loutre, & Laskar, 1992;Eugster & Kelts, 1983;Garcées, Gierlowski-Kordesch, & Bragonier, 1997;Hao et al, 2011;Volkman, 1986Volkman, , 2016. Therefore, the integration of all of these types of data (as emphasized above) is preferable for deciphering the depositional conditions of source rocks.…”

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confidence: 99%

Characterizations and accumulation of lacustrine source rocks in the Zhu I Depression, Pearl River Mouth Basin, China

Wang

Dong

et al. 2019

Geological Journal

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The study of source rocks is a key component in the exploration and discovery of hydrocarbon plays in the offshore petroliferous basins of China. Geochemical analyses, drilling, seismic, and microfossil data were integrated to document the formation mechanism of lacustrine source rocks contained in the Wenchang Formation in the Zhu I Depression of the Pearl River Mouth Basin, China. Several factors that control the development of lacustrine source rocks were evaluated in this study, including tectonics, sedimentary conditions, palaeoclimate, the supply of organic matter, and redox conditions. The deposition and occurrence of source rocks is a combined function of these factors. Lacustrine source rocks are characterized by high organic matter contents (average TOC value = 1.33 wt.%) and are dominated by type I and type II1–2 kerogen, which primarily originate from planktonic algae. The rifting of basement rocks, syn‐sedimentary faults, and palaeoclimate played significant roles in controlling the geochemical properties of the source rocks (e.g., controlling the abundance and types of organic matter). The Eocene lacustrine source rocks were deposited when the palaeoclimate was characterized by humid to semi‐humid, subtropical to tropical weather that did not have a stable temperature or humidity. Controlled by large‐scale faults, “Half‐graben patterns” and “Graben patterns” are the two main palaeotopographic patterns where the thermal stratification of deep lake water resulted in flourishing planktonic algae in its surface zones. Dysoxic to anoxic conditions prevailed during the deposition of the lacustrine source rocks. An underfilled basin situation caused the occurrence of abundant organic matter during the period of maximum surface flooding.

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Sterols in Microalgae

Cited by 48 publications

References 151 publications

Microalgal carotenoids and phytosterols regulate biochemical mechanisms involved in human health and disease prevention

Microalgal carotenoids and phytosterols regulate biochemical mechanisms involved in human health and disease prevention

Assessment of Halamphora coffeaeformis Growth and Biochemical Composition for Aquaculture Purposes

Characterizations and accumulation of lacustrine source rocks in the Zhu I Depression, Pearl River Mouth Basin, China

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