Biology subjects

Golberg, A.

Publications and source records attributed to Golberg, A..

2 recordsLinked to original sources

bioRxiv2020

Marine Bacteria Associated with the Green Seaweed Ulva sp. for the Production of Polyhydroxyalkanoates

The biosynthesis of polyhydroxyalkanoate (PHA) biopolymers from certain marine microbes, associated with green macroalgae Ulva sp., has attracted significant attention. The Ulva sp. is abundant biomass in numerous locations around the world and could be easily cultivated by marine farming. The variety of sugars found in Ulva sp. homogenate could be used as a carbon source for microbial growth and PHA production. In this work, we isolated and explored a series of bacterial strains that function as potential producers of P(3HB), utilizing a range of common sugars found in Ulva sp. Analysis of 16S rDNA gene-sequence revealed that the PHA-producing bacteria were phylogenetically related to species of the genus Cobetia, Bacillus, Pseudoaltermonas, and Sulfito-bacter. The highest-yield of P(3HB) was observed in the case of new Cobetia strain, C. amphilecti, with up to 61% (w/w) in the presence of mannitol and 12% (w/w) on Ulva sp. acid hydrolysate as a substrate.

microbiology↗

bioRxiv2020

Multi-Scale Modeling of Intensive Macroalgae Cultivation and Marine Nitrogen Sequestration

Multi-scale macroalgae growth models are required for the efficient design of sustainable, economically viable and environmentally safe farms. Here, we develop a multi-scale model for Ulva sp. macroalgae growth and nitrogen sequestration in an intensive cultivation farm, regulated by temperature, light and nutrients. The model incorporates a range of scales by incorporating spatial effects in two steps: light extinction at the reactor scale (1 m) and nutrient absorption at the farm scale (1 km). The model was validated on real data from an experimental reactor installed in the sea. Biomass production rates, chemical compositions and nitrogen removal were simulated under different seasons, levels of dilution in the environment and water-exchange rate in the reactor. This multi-scale model provides an important tool for environmental authorities and seaweed farmers who desire to upscale to large bioremediation and/or macroalgae biomass production farms, thus promoting the marine sustainable development and the macroalgae-based bioeconomy.

bioengineering↗