2,170 research outputs found
PEF assisted extraction of valuable compounds from microalgae C. vulgaris
No full textIn recent years the cultivation and exploitation of Microalgae biomass has stimulated intensive research due both to its high productivity, when compared to agriculturally grown biomass, and the large relative content of more than 50% of valuable cell components, like lipids, proteins, polysaccharides, antioxidants, vitamins and pigments (Goettel et al., 2013; Luengo et al., 2014). However, the extraction of these compounds is limited by the mass transfer of these compounds through cell membranes.
In this frame, thanks to the reduction of the resistances to mass transfer due to the induced permeabilization of plant cells, Pulsed Electric Field (PEF) technology can be used as a pre-treatment of concentrated microalgae suspension in order to enhance the extraction yield of valuable compounds (such as antioxidants and colorants) from the inner parts of the cells(Mahnič-Kalamiza et al., 2014).
In this work the effect of different PEF treatment intensity on the extraction of valuable compound from microalgae Chlorella Vulgaris was investigated.
Culture of C. vulgaris strain inoculated in TAP-medium, were cultivated in batch 26 L photo-bioreactor. Growth conditions were monitored by OD measurements at 750 nm. The algae were harvested after 18-24 days and concentrated up to a final biomass concentration of about 40-50 gdw/kgsus.
PEF experiments of different intensities (E=27-35 kV/cm, and WT=50-100- 150 kJ/kg) were carried out in a laboratory scale continuous flow unit. Determinations of time-conductivity profile as well as quantification of dry matter, protein content, total polyphenolics (TP), and antioxidant activity (AA) of the supernatant were performed.
Results showed a higher increase of the electrical conductivity of PEF treated suspension, when compared to the untreated sample. Moreover, the PEF treatment increased the dry matter content as well as the amount of proteins released into the supernatant from inside the algae cells. Additionally, increments of total phenolics and antioxidant activity were also detected.
The results obtained from this study demonstrate the potential of PEF for improving extraction of compounds of interest from the microalgae C. vulgaris
Effect of PEF Treatment on Extraction of Valuable Compounds from Microalgae C. vulgaris
No full textRecovery of intracellular components from microalgae requires a cell disruption step. In recent years, pulsed
electric field (PEF) treatment has been discussed to be an efficient alternative to conventional cell disruption
techniques, i.e. homogenization or bead milling.
In this work the effect of the main processing parameters of the PEF treatment on the extraction of valuable
compounds from microalgae Chlorella Vulgaris was investigated.
Culture of C. vulgaris strain inoculated in TAP-medium, were cultivated in batch 26 L photo-bioreactor. The
algae were harvested after 24 days and concentrated up to a final biomass concentration of 40.8 gdw/kg of
suspension. PEF experiments at different field strength (E=27-35 kV/cm) and energy input (WT=50-100-150
kJ/kg) were carried out in a laboratory scale continuous flow unit. Determinations of time-conductivity profile
as well as quantification of dry matter, carbohydrates, protein content, and total phenolics of the supernatant
collected after 1 h extraction, were performed.
Results showed a higher increase of the electrical conductivity of PEF treated suspension, when compared to
the untreated samples, as a result of the irreversible electroporation induced by pulse treatment. Moreover,
the PEF treatment increased the dry matter content as well as the amount of carbohydrates, proteins and
phenolic compounds released into the supernatant from inside the algae cells.
The results obtained from this study demonstrate the potential of PEF for improving extraction yield of
valuable compounds from microalgae
Martina Drijverová and her literary works for children (author´s portrait)
No full textThis thesis Martina Drijverova and her literatur for children (the author´s portrait) is engaged in work of writer and screenwriter Martina Drijeverová. She is an excellent writer of literature for children. In the first part of this work her story writing is mentioned and the second part deals with her fairy-tale writing. The other author´s work written for children is in the third part. The conclusion of this thesis appreciates the author´s credit in literature for chidlren. Analysis of some books are available. The supplementary part is composed of autor´s biography and her photograph, some book covers, list of the autor´s work {--} televiews, radio plays and serials, audio tapes and CDs, stage plays, books written in Braille
HERStory Makers 2022: Martina Čagalj
No full textMartina Čagalj is a PhD candidate at the University of Split studying seaweeds as a potential source of bioactive compounds. She took part in HERStory Makers 2022.What is HERStory Makers?HERStory Makers is a social media competition for female-identifying early career researchers to share their research, their career journeys, and to inspire the next generation. Winners are selected by public vote. HERStory Makers is also part of EXPLORATHON, Scotland's contribution to European Researchers' Night.In 2022-23, EXPLORATHON was supported by the Engineering & Physical Sciences Research Council [grant number EP/X020894/1].Author contributions to contentMartina Čagalj conceived, planned, and recorded the video content. Kirsty Ross edited the video content to insert HERStory Maker credits, add subtitles, and maintain video length below Twitter/X limit of 2 mins and 20 secs, prior to scheduling the social media posts.</p
The role of data science in software development
No full textauthor: Martina WeberMasterarbeit Universität Innsbruck 201
The role of data science in software development
No full textauthor: Martina WeberMasterarbeit Universität Innsbruck 201
The role of data science in software development
No full textauthor: Martina WeberMasterarbeit Universität Innsbruck 201
Man kann nicht nicht vergleichen. Sprachvergleich und Sprachreflexion in einer integrierten Mehrsprachigkeitsdidaktik mit Englisch als Brückensprache
No full textPlurilinguism and plurilingual didactics have gained an important position in scientific discussion, even though interlingual and integrated approaches to teaching practice are still lacking. After a short description of various approaches, all based on language comparison and metalingual reflection, the author suggests adopting English as a bridge-language in plurilingual didactics, independent of the language family and languages studied. On the basis of various learner profiles, the author illustrates the benefit of using English as an element of language comparison and reflection in the learning process of other languages
Author Correction: Gluten consumption and inflammation affect the development of celiac disease in at-risk children
No full textThe original version of this Article contained an error in the spelling of the authors Renata Auricchio, Ilaria Calabrese, Martina Galatola, Donatella Cielo, Fortunata Carbone, Marianna Mancuso, Giuseppe Matarese, Riccardo Troncone, Salvatore Auricchio & Luigi Greco which were incorrectly given as Auricchio Renata, Calabrese Ilaria, Galatola Martina, Cielo Donatella, Carbone Fortunata, Mancuso Marianna, Matarese Giuseppe, Troncone Riccardo, Auricchio Salvatore & Greco Luigi. The original article has been corrected
Bottlebrush HPMA co-polymers based on a polyphosphazene backbone
No full textAuthor Martina Cornelia Huber BScMasterarbeit Universität Linz 2023Arbeit auf den öffentlichen PCs in den Bibliotheken der JKU+Medizin abrufba
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