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  1. Book ; Online: The bright side of life

    Barbosa, Maria J.

    2021  

    Abstract: Microalgae can provide nutritional food in places where agriculture is limited, can replace unsustainable oils such as palm and fish oil and provide proteins to cope with the growth in population. With an interdisciplinary team we create knowledge and ... ...

    Abstract Microalgae can provide nutritional food in places where agriculture is limited, can replace unsustainable oils such as palm and fish oil and provide proteins to cope with the growth in population. With an interdisciplinary team we create knowledge and technology to make this happen. This inaugural lecture shares my vision and journey to become Personal Professor in Microalgal Biotechnology, and the directions I will take in the future. Team, education, interdisciplinarity, society and art are the keywords reflecting my lecture.
    Keywords algae ; biobased economy ; photosynthesis ; algen ; fotosynthese
    Language English
    Publisher Wageningen University & Research
    Publishing country nl
    Document type Book ; Online
    Database BASE - Bielefeld Academic Search Engine (life sciences selection)

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  2. Article: Microalgae based production of single-cell protein

    Janssen, Marcel / Wijffels, Rene H / Barbosa, Maria J

    Current opinion in biotechnology. 2022 June, v. 75

    2022  

    Abstract: Microalgae express high protein levels and can be produced in contained cultivation systems with low water requirements and complete fertilizer use. The production potential is 22–44 tons of protein per hectare per year although the current production ... ...

    Abstract Microalgae express high protein levels and can be produced in contained cultivation systems with low water requirements and complete fertilizer use. The production potential is 22–44 tons of protein per hectare per year although the current production scale is small. Techno economic analyses have shown good potential for scale-up and cost reduction. Large-scale production of microalgae in the post-fossil era will rely on the capture of carbon dioxide from the air, or sugars from crops. Microalgal amino acid composition matches well with requirements for food and feed, which, in combination with novel biomass pre-treatment steps, will guarantee high-quality microalgal protein. For a broadening of the microalgae species available as single-cell protein, novel food approval is required.
    Keywords NPK fertilizers ; air ; algae culture ; amino acid composition ; biomass ; biotechnology ; carbon dioxide ; cost effectiveness ; fertilizer application ; microalgae ; novel foods ; single cell protein
    Language English
    Dates of publication 2022-06
    Publishing place Elsevier Ltd
    Document type Article
    ZDB-ID 1052045-4
    ISSN 1879-0429 ; 0958-1669
    ISSN (online) 1879-0429
    ISSN 0958-1669
    DOI 10.1016/j.copbio.2022.102705
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    In stock of ZB MED Cologne/Königswinter

    Zs.A 3071: Show issues Location:
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  3. Article ; Online: Microalgae based production of single-cell protein.

    Janssen, Marcel / Wijffels, Rene H / Barbosa, Maria J

    Current opinion in biotechnology

    2022  Volume 75, Page(s) 102705

    Abstract: Microalgae express high protein levels and can be produced in contained cultivation systems with low water requirements and complete fertilizer use. The production potential is 22-44 tons of protein per hectare per year although the current production ... ...

    Abstract Microalgae express high protein levels and can be produced in contained cultivation systems with low water requirements and complete fertilizer use. The production potential is 22-44 tons of protein per hectare per year although the current production scale is small. Techno economic analyses have shown good potential for scale-up and cost reduction. Large-scale production of microalgae in the post-fossil era will rely on the capture of carbon dioxide from the air, or sugars from crops. Microalgal amino acid composition matches well with requirements for food and feed, which, in combination with novel biomass pre-treatment steps, will guarantee high-quality microalgal protein. For a broadening of the microalgae species available as single-cell protein, novel food approval is required.
    MeSH term(s) Biofuels ; Biomass ; Carbon Dioxide/metabolism ; Microalgae/metabolism
    Chemical Substances Biofuels ; Carbon Dioxide (142M471B3J)
    Language English
    Publishing date 2022-02-26
    Publishing country England
    Document type Journal Article ; Review
    ZDB-ID 1052045-4
    ISSN 1879-0429 ; 0958-1669
    ISSN (online) 1879-0429
    ISSN 0958-1669
    DOI 10.1016/j.copbio.2022.102705
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  4. Article: Growth and fatty acid distribution over lipid classes in

    Ferrer-Ledo, Narcís / Stegemüller, Lars / Janssen, Marcel / Wijffels, René H / Barbosa, Maria J

    Frontiers in plant science

    2023  Volume 14, Page(s) 1078998

    Abstract: After light, temperature is the most relevant environmental parameter in outdoors cultivation of microalgae. Suboptimal and supraoptimal temperatures negatively impact growth and photosynthetic performance with a subsequent effect on lipid accumulation. ... ...

    Abstract After light, temperature is the most relevant environmental parameter in outdoors cultivation of microalgae. Suboptimal and supraoptimal temperatures negatively impact growth and photosynthetic performance with a subsequent effect on lipid accumulation. It is generally recognised that lower temperatures trigger an increase in fatty acid desaturation while higher temperatures trigger the opposite reaction. The effect of temperature on lipid classes has been less studied in microalgae and in certain cases, the effect of light cannot be completely excluded. In this research, the effect of temperature on growth, photosynthesis, and lipid class accumulation in
    Language English
    Publishing date 2023-02-10
    Publishing country Switzerland
    Document type Journal Article
    ZDB-ID 2613694-6
    ISSN 1664-462X
    ISSN 1664-462X
    DOI 10.3389/fpls.2023.1078998
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  5. Article ; Online: Expression of glycerol-3-phosphate acyltransferase increases non-polar lipid accumulation in Nannochloropsis oceanica.

    Südfeld, Christian / Kiyani, Aamna / Wefelmeier, Katrin / Wijffels, René H / Barbosa, Maria J / D'Adamo, Sarah

    Microbial cell factories

    2023  Volume 22, Issue 1, Page(s) 12

    Abstract: Microalgae are considered a suitable production platform for high-value lipids and oleochemicals. Several species including Nannochloropsis oceanica produce large amounts of essential [Formula: see text]-3 polyunsaturated fatty acids (PUFAs) which are ... ...

    Abstract Microalgae are considered a suitable production platform for high-value lipids and oleochemicals. Several species including Nannochloropsis oceanica produce large amounts of essential [Formula: see text]-3 polyunsaturated fatty acids (PUFAs) which are integral components of food and feed and have been associated with health-promoting effects. N. oceanica can further accumulate high contents of non-polar lipids with chemical properties that render them a potential replacement for plant oils such as palm oil. However, biomass and lipid productivities obtained with microalgae need to be improved to reach commercial feasibility. Genetic engineering can improve biomass and lipid productivities, for instance by increasing carbon flux to lipids. Here, we report the overexpression of glycerol-3-phosphate acyltransferase (GPAT) in N. oceanica during favorable growth conditions as a strategy to increase non-polar lipid content. Transformants overproducing either an endogenous (NoGPAT) or a heterologous (Acutodesmus obliquus GPAT) GPAT enzyme targeted to the endoplasmic reticulum had up to 42% and 51% increased non-polar lipid contents, respectively, compared to the wild type. Biomass productivities of transformant strains were not substantially impaired, resulting in lipid productivities that were increased by up to 37% and 42% for NoGPAT and AoGPAT transformants, respectively. When exposed to nutrient stress, transformants and wild type had similar lipid contents, suggesting that GPAT enzyme exerts strong flux control on lipid synthesis in N. oceanica under favorable growth conditions. NoGPAT transformants further accumulated PUFAs in non-polar lipids, reaching a total of 6.8% PUFAs per biomass, an increase of 24% relative to the wild type. Overall, our results indicate that GPAT is an interesting target for engineering of lipid metabolism in microalgae, in order to improve non-polar lipid and PUFAs accumulation in microalgae.
    MeSH term(s) Glycerol/metabolism ; Oils/metabolism ; Genetic Engineering ; Glycerol-3-Phosphate O-Acyltransferase/genetics ; Glycerol-3-Phosphate O-Acyltransferase/metabolism ; Stramenopiles/genetics ; Microalgae/genetics ; Microalgae/metabolism ; Biomass ; Phosphates/metabolism
    Chemical Substances Glycerol (PDC6A3C0OX) ; Oils ; Glycerol-3-Phosphate O-Acyltransferase (EC 2.3.1.15) ; Phosphates
    Language English
    Publishing date 2023-01-16
    Publishing country England
    Document type Journal Article
    ZDB-ID 2091377-1
    ISSN 1475-2859 ; 1475-2859
    ISSN (online) 1475-2859
    ISSN 1475-2859
    DOI 10.1186/s12934-022-01987-y
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  6. Article ; Online: Hypes, hopes, and the way forward for microalgal biotechnology.

    Barbosa, Maria J / Janssen, Marcel / Südfeld, Christian / D'Adamo, Sarah / Wijffels, Rene H

    Trends in biotechnology

    2023  Volume 41, Issue 3, Page(s) 452–471

    Abstract: The urge for food security and sustainability has advanced the field of microalgal biotechnology. Microalgae are microorganisms able to grow using (sun)light, fertilizers, sugars, ... ...

    Abstract The urge for food security and sustainability has advanced the field of microalgal biotechnology. Microalgae are microorganisms able to grow using (sun)light, fertilizers, sugars, CO
    MeSH term(s) Microalgae/genetics ; Microalgae/metabolism ; Fertilizers ; Biotechnology ; Crops, Agricultural ; Biomass
    Chemical Substances Fertilizers
    Language English
    Publishing date 2023-01-25
    Publishing country England
    Document type Journal Article ; Review
    ZDB-ID 47474-5
    ISSN 1879-3096 ; 0167-7799
    ISSN (online) 1879-3096
    ISSN 0167-7799
    DOI 10.1016/j.tibtech.2022.12.017
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    In stock of ZB MED Cologne/Königswinter

    Zs.A 2750: Show issues Location:
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  7. Article ; Online: Light and carbon limited photosynthesis of Chlorella sorokiniana

    Yoshida, Hiroki / van Oossanen, Sabine / Barbosa, Maria J. / Janssen, Marcel

    Algal Research

    2023  Volume 69

    Abstract: Carbon dioxide (CO2) and light are essential for high photosynthetic rates of microalgal cultures. Microalgal photosynthetic behavior at low CO2 concentrations has not been revealed yet at the same level of detail as leaf photosynthesis. In the present ... ...

    Abstract Carbon dioxide (CO2) and light are essential for high photosynthetic rates of microalgal cultures. Microalgal photosynthetic behavior at low CO2 concentrations has not been revealed yet at the same level of detail as leaf photosynthesis. In the present study, we investigated the short-term photosynthetic response of suspended Chlorella sorokiniana to limiting light intensity and CO2 concentration. We used a novel CO2-based photosynthesis monitor originating from leaf research but equipped with an aquatic chamber sparged with CO2 enriched air. Photosynthesis was measured by employing a steady-state CO2 mass balance over the chamber. Light and carbon response curves were determined under constant pH, temperature, dissolved oxygen, light intensity or dissolved carbon dioxide. We determined the volumetric mass transfer coefficient of the aquatic chamber to accurately convert gaseous CO2 partial pressure into aqueous CO2 concentration to evaluate the CO2 response measurements. Light response measurements on dilute algal cultures revealed a high photosynthetic capacity on a time scale of minutes which by far exceeded the average CO2 uptake on a time scale of hours (cell growth). Light response measurements with dense and fully absorbing cultures provided accurate insight into the response of microalgal mass culture to changing incident irradiance, including the efficiency of photosynthesis of the algal culture as a whole. CO2 response measurements demonstrated severe CO2 limitation at dissolved CO2 levels of <20 μM giving a concrete target for optimization of CO2 supply in large-scale cultivation systems. Measurements at a background of either 21 % O2 (air) or 2 % O2 indicated the existence of photorespiration in Chlorella. Moreover, the magnitude of photorespiration first increased and then decreased again while reduced dissolved CO2 levels, indicating the activation of a carbon concentrating mechanism at low CO2. Simultaneous measurement of the quantum yield of PSII linear electron transport (ϕPSII) and CO2 ...
    Keywords CO-based photosynthesis monitor ; Carbon concentrating mechanism ; Carbon response ; Light response ; Photorespiration
    Subject code 580
    Language English
    Publishing country nl
    Document type Article ; Online
    ISSN 2211-9264
    Database BASE - Bielefeld Academic Search Engine (life sciences selection)

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  8. Article: Fucoxanthin and docosahexaenoic acid production by cold-adapted Tisochrysis lutea

    Gao, Fengzheng / Cabanelas, Iago Teles Dominguez / Wijffels, René H. / Barbosa, Maria J.

    New biotechnology. 2022 Jan. 25, v. 66

    2022  

    Abstract: Tisochrysis lutea is an important microalgal species for fucoxanthin and docosahexaenoic acid (DHA) production with an optimum cultivation temperature of approximately 30 °C. The aim of the present work was to develop a winter strain with high ... ...

    Abstract Tisochrysis lutea is an important microalgal species for fucoxanthin and docosahexaenoic acid (DHA) production with an optimum cultivation temperature of approximately 30 °C. The aim of the present work was to develop a winter strain with high productivity at 15 °C. The response of the original strain to a decrease in temperature from 30 °C to 15 °C was investigated in continuous turbidostat experiments. This was followed by adaptation for >180 days at 15 °C and 2 rounds of sorting for cells with high chlorophyll fluorescence (top 5%) using fluorescence-activated cell sorting (FACS). For the original strain the productivity of biomass, fucoxanthin, and DHA decreased by 92 %, 98 % and 85 % respectively when decreasing the temperature from 30 °C to 15 °C. In the sorted cold-adapted ‘winter strain’, biomass, fucoxanthin, and DHA productivities were similar to those at 30 °C. In addition, the fucoxanthin concentration increased from 1.11 to 4.24 mg g⁻¹ dry weight and the polar lipid fraction in total fatty acids increased from 21 % to 55 %. The winter strain showed a robust and stable phenotype after one year of cultivation, expanding the outdoor fucoxanthin and lipid production seasons for this species.
    Keywords biomass ; biotechnology ; chlorophyll ; docosahexaenoic acid ; microalgae ; phenotype ; temperature
    Language English
    Dates of publication 2022-0125
    Size p. 16-24.
    Publishing place Elsevier B.V.
    Document type Article
    ZDB-ID 2400836-9
    ISSN 1876-4347 ; 1871-6784
    ISSN (online) 1876-4347
    ISSN 1871-6784
    DOI 10.1016/j.nbt.2021.08.005
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  9. Article ; Online: Microalgae based production of single-cell protein

    Janssen, Marcel / Wijffels, Rene H. / Barbosa, Maria J.

    Current Opinion in Biotechnology

    2022  Volume 75

    Abstract: Microalgae express high protein levels and can be produced in contained cultivation systems with low water requirements and complete fertilizer use. The production potential is 22–44 tons of protein per hectare per year although the current production ... ...

    Abstract Microalgae express high protein levels and can be produced in contained cultivation systems with low water requirements and complete fertilizer use. The production potential is 22–44 tons of protein per hectare per year although the current production scale is small. Techno economic analyses have shown good potential for scale-up and cost reduction. Large-scale production of microalgae in the post-fossil era will rely on the capture of carbon dioxide from the air, or sugars from crops. Microalgal amino acid composition matches well with requirements for food and feed, which, in combination with novel biomass pre-treatment steps, will guarantee high-quality microalgal protein. For a broadening of the microalgae species available as single-cell protein, novel food approval is required.
    Keywords Life Science
    Language English
    Publishing country nl
    Document type Article ; Online
    ZDB-ID 1052045-4
    ISSN 1879-0429 ; 0958-1669
    ISSN (online) 1879-0429
    ISSN 0958-1669
    Database BASE - Bielefeld Academic Search Engine (life sciences selection)

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    In stock of ZB MED Cologne/Königswinter

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  10. Article: Heterotrophic vs autotrophic production of microalgae: Bringing some light into the everlasting cost controversy

    Ruiz, Jesús / Wijffels, Rene H. / Dominguez, Manuel / Barbosa, Maria J.

    Algal research. 2022 May, v. 64

    2022  

    Abstract: Heterotrophic or autotrophic? This is the continuous question the industry faces when microalgae production is the endeavor. Surprisingly, nowadays specialists have not reached a consensus on which is the most economical option. The current work analyses ...

    Abstract Heterotrophic or autotrophic? This is the continuous question the industry faces when microalgae production is the endeavor. Surprisingly, nowadays specialists have not reached a consensus on which is the most economical option. The current work analyses costs for heterotrophic and autotrophic cultivation of microalgae at an industrial scale. Heterotrophic cultivation of microalgae results in a production cost of 4.00 €·kg⁻¹ of dry weight as a centrifuged paste. This is within the range of autotrophic costs, but still above the production cost in some photobioreactors. The study also identifies the current limitations on the technology and studies the effect on the cost of overcoming these. Once achieved, the advances in the process could result in a heterotrophic production cost reduced to 1.08 €·kg⁻¹. Autotrophic cultivation seems competitive with heterotrophic production. It is time to leap forward in the autotrophic production scale to achieve the critical reduction in production cost.
    Keywords algae culture ; industry ; microalgae ; photobioreactors ; research
    Language English
    Dates of publication 2022-05
    Publishing place Elsevier B.V.
    Document type Article
    ISSN 2211-9264
    DOI 10.1016/j.algal.2022.102698
    Database NAL-Catalogue (AGRICOLA)

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