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Pectin influences the kinetics of in vitro lipid digestion in oil-in-water emulsions KU Leuven
Oil-in-water emulsions were prepared with 5% (w/v) carrot-enriched olive oil and stabilized with Tween 80 (TW), phosphatidylcholine (PC), citrus pectin (CP) or a combination of these emulsifiers. Additionally, the methylesterification degree (DM) of citrus pectin was modified, resulting in three different studied pectin structures: CP82, CP38 and CP10. All initial emulsions presented small initial oil droplet sizes and were submitted to an in ...
Emulsion stability during gastrointestinal conditions effects lipid digestion kinetics KU Leuven
Oil-in-water emulsions were prepared with carrot- or tomato-enriched olive oil (5%w/v) and stabilized with Tween80 or sucrose esters (0.5%w/v) with different hydrophilic-lipophilic balance (8; 11 or 16). All emulsions had similar initial oil droplet sizes and were submitted to simulated gastrointestinal conditions using a kinetic digestion procedure. Sucrose esters induced an unstable system after gastric conditions leading to coalesced oil ...
The development of an integrated environmental techno-economic assessment framework. How to assess the potential of microalgal-based biorefineries Universiteit Hasselt
During the development of a new technology, three main questions need to be answered: 1) “Is the process technologically feasible?”; 2) “Is the process economically profitable?”; 3) “Is the process environmentally sustainable?”. The answers on these questions are currently provided by different assessment methodologies at different moments of technology development. This leads to differing system boundaries and a large variation in results. An ...
Salinity induces specific metabolic changes in sugarcane shoot explants in temporary immersion bioreactors Universiteit Antwerpen
There is a great demand of salt-tolerant sugarcane planting material in Cuba. Temporary immersion bioreactors (TIB) are effective to significantly increase sugarcane in vitro shoot proliferation rate from 1: 4 in conventional containers to about 1:35. Sugarcane micropropagation in TIBs under NaCl stress may help screen mutants with salinity tolerance. We developed the experiment shown here to identify a NaCl concentration able to stress shoot in ...
Carotene degradation and isomerization during thermal processing: a review on the kinetic aspects KU Leuven
Kinetic models are important tools for process design and optimization to balance desired and undesired reactions taking place in complex food systems during food processing and preservation. This review covers the state of the art on kinetic models available to describe heat-induced conversion of carotenoids, in particular lycopene and β-carotene. First, relevant properties of these carotenoids are discussed. Second, some general aspects of ...
Bioactive compounds and antioxidant activities of different grape (**Vitis vinifera** L.) seed oils extracted by supercritical $CO_{2}$ and organic solvent Universiteit Antwerpen
This study evaluates and compares the composition in bioactives and the antioxidant activity of six different grape seed oils. In addition, the comparison also concerns two different techniques, namely supercritical carbon dioxide (SC-CO2) extraction and conventional solvent extraction (Soxhlet method with n-hexane as solvent). Tocopherols, tocotrienols, chlorophylls, carotenoids and total phenol contents, as well as lipophilic and hydrophilic ...
Dynamics of omega-3 long chain polyunsaturated fatty acid incorporation in egg yolk by autotrophic microalgal supplementation KU Leuven
© 2015 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim. Four different microalgal species (Phaeodactylum tricornutum, Isochrysis galbana, Nannochloropsis oculata, and Chlorella fusca) in two doses (125 and 250mg ALA+EPA+DHA per 100g feed) were supplemented to the diet of laying hens to examine the impact on the dynamics of long chain omega-3 polyunsaturated fatty acid (n-3 LC-PUFA) incorporation in the egg and yolk color changes. However, no ...
Impact of nutrient stress on antioxidant production in three species of microalgae KU Leuven
Microalgae are a novel source of sustainable natural antioxidants with various applications, including food preservation. To optimize antioxidant production in microalgae, we investigated the influence of nutrient limitation on antioxidant content in three species, Phaeodactylum tricornutum, Tetraselmis suecica and Chlorella vulgaris. Microalgae were cultivated in batch culture under nutrient replete, P- and N-limited conditions. Total ...
Comparing the impact of high pressure high temperature and thermal sterilization on the volatile fraction of vegetable purees: a fingerprinting and kinetics approach KU Leuven
Since 2000, high pressure high temperature (HPHT) has been cited as an interesting processing technology to produce shelf-stable low-acid foods (although without industrial implementation so far). However, the knowledge on the effect of HPHT processing on food quality-related chemical reactions is far from being fully documented. Therefore, there is a need for a thorough approach to investigate the impact of HPHT processing on chemical ...