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  • 2020-2023  (2)
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  • 1
    Publication Date: 2022-10-24
    Description: "Mak-Pak" or "Mak-Pak Scale-Up" is a project for the industrial implementation and use of a packaging concept consisting of macroalgae in the food sector. The aim is to develop a biode-gradable, sustainable and edible packaging material from macroalgae as a dosage form and for "out-of-home" consumption. For this, different algae strains will be studied and the best conditions for high productivity will be researched. The growth and the complex reproduc-tion cycle play a major role in biomass production. This thesis intends to answer the ques-tion how different salinity treatments (10,15,20 and 30 PSU) affect the growth and photo-synthetic activity of germlings from Ulva lacinulata, Ulva californica and Ulva linza. By meas-uring the photosynthetic activity and growth, optimization of the experimental method was developed. The different salinities of 10,15,20 and 30 PSU showed significant differences in grow area and relative growth rate. The photosynthetic activity differed, but not signifi-cantly. Differences in the tolerability of different salt levels have been shown between spe-cies. The method of experimental setting was optimized and discussed. Based on the opti-mized method the question if it’s possible to use this method to differentiate between phases of the life cycle (between Gameto- and Sporophytes) was explored for Ulva califor-nica. In cultivation selective breeding plays a major role. Using the photosynthetic activity to differentiate between lifecycle stages seemed inconclusive and is discussed.
    Repository Name: EPIC Alfred Wegener Institut
    Type: Thesis , notRev
    Format: application/pdf
    Location Call Number Limitation Availability
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  • 2
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    In:  EPIC3SeaWheat COST Action Conference: From fundamental biology to aquaculture: state-of-the-art, bottlenecks and gaps, Cádiz, Spain, 2022-09
    Publication Date: 2022-10-16
    Description: The mission of the Mak Pak Scale Up project 2021 present) is to develop a seaweed based food packaging material and to sustainably scale up the production of seaweed, including Ulva spp in a recirculating land based facility supplemented with artificial seawater that requires a selection and optimization of the seaweed of interest The Ulva genus has previously shown high plasticity and capacity to acclimate and develop under broad ranges of environmental conditions, suggesting this may be a promising candidate for production in a RAS with low salinity artificial seawater Selecting an Ulva strain well adapted to such conditions will help reduce the costs of salt and, therefore, optimize production The aim of this study was to determine how salinity can be used and adapted throughout the entire Ulva production to define several key points 1 strain selection 2 nursery and seeding 3 optimized production in adult Ulva and 4 increasing functionality (e g high antioxidant activity) Based on the results of three different experiments, it was possible to conclude how salinity impacts different strains of Ulva (tubular and blade species) from warm temperate environments, during three key moments of their development and with that, conclude which strains would be more suited to be scaled up within the scope of land based production At the same time, the data presented serve as a baseline for further work with Ulva under different cultivation conditions
    Repository Name: EPIC Alfred Wegener Institut
    Type: Conference , NonPeerReviewed
    Format: application/pdf
    Location Call Number Limitation Availability
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