Minna Juvonen

Overview of T and D–T results in JET with ITER-like wall

Domenico Abate, N. Abid, Paulo Abreu, O. Adabonyan et autres

Abstract In 2021 JET exploited its unique capabilities to operate with T and D–T fuel with an ITER-like Be/W wall (JET-ILW). This second major JET D–T campaign (DTE2), after DTE1 in 1997, represented the culmination of a series of JET enhancements—new fusion …

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Enhanced performance in fusion plasmas through turbulence suppression by megaelectronvolt ions

S. Mazzi, Jeronimo Garcia, D. Zarzoso, Ye. O. Kazakov et autres

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Overview of JET results for optimising ITER operation

J. Mailloux, N. Abid, K. Abraham, Paulo Abreu et autres

Abstract The JET 2019–2020 scientific and technological programme exploited the results of years of concerted scientific and engineering work, including the ITER-like wall (ILW: Be wall and W divertor) installed in 2010, improved diagnostic capabilities now fully available, a major neutral beam …

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Separation of isomeric cereal-derived arabinoxylan-oligosaccharides by collision induced dissociation-travelling wave ion mobility spectrometry-tandem mass spectrometry (CID-TWIMS-MS/MS)

Minna Juvonen, Edwin J. Bakx, Henk Arie Schols, Maija Tenkanen

The potential of travelling wave ion mobility spectroscopy in combination with collision induced dissociation tandem mass spectrometry (CID-TWIMS-MS/MS) to separate cereal-derived isomeric arabinoxylan-oligosaccharides (A)XOS was investigated. Three trisaccharide, four tetrasaccharide, and four pentasaccharide (A)XOS isomers were analyzed by positive and negative ionization …

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Mass spectrometry methods for the structural analysis of glucan- and arabinoxylan-derived oligosaccharides

Minna Juvonen

Oligosaccharides potentially present in cereal matrices have attracted attention because of their health-related properties, such as prebiotic potential. In addition to those that are naturally present, oligosaccharides can be formed during processing by the hydrolysis of cereal polysaccharides, such as arabinoxylan, by …

Identification and structural analysis of cereal arabinoxylan-derived oligosaccharides by negative ionization HILIC-MS/MS

Minna Juvonen, Markus Kotiranta, Jouni Kalevi Jokela, Päivi M. Tuomainen et autres

Recent works provide evidence of the prebiotic potential of arabinoxylan-derived oligosaccharides (A)XOS. In this study, we developed a structural analysis for cereal-derived (A)XOS by negative ionization HILIC-MS/MS. Initially, we assessed twelve (A)XOS samples of known structures with different linkage positions and branching …

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A Novel Colletotrichum graminicola Raffinose Oxidase in the AA5 Family

Martina Blomster Andberg, Filip Mollerup, Kirsti Parikka, Sanna Koutaniemi et autres

ABSTRACT We describe here the identification and characterization of a copper radical oxidase from auxiliary activities family 5 (AA5_2) that was distinguished by showing preferential activity toward raffinose. Despite the biotechnological potential of carbohydrate oxidases from family AA5, very few members have …

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Optimization of Isomaltooligosaccharide Size Distribution by Acceptor Reaction of Weissella confusa Dextransucrase and Characterization of Novel α-(1→2)-Branched Isomaltooligosaccharides

Qiao Shi, Yaxi Hou, Minna Juvonen, Päivi M. Tuomainen et autres

Long-chain isomaltooligosaccharides (IMOs) are promising prebiotics. IMOs were produced by a Weissella confusa dextransucrase via maltose acceptor reaction. The inputs of substrates (i.e., sucrose and maltose, 0.15-1 M) and dextransucrase (1-10 U/g sucrose) were used to control IMO yield and profile. According …

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Glucuronic acid in Arabidopsis thaliana xylans carries a novel pentose substituent

Sun‐Li Chong, Sanna Koutaniemi, Minna Juvonen, Marta Derba‐Maceluch et autres

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Lactose- and cellobiose-derived branched trisaccharides and a sucrose-containing trisaccharide produced by acceptor reactions of Weissella confusa dextransucrase

Qiao Shi, Minna Juvonen, Yaxi Hou, Ilkka Kajala et autres

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Supercritical water treatment for cello-oligosaccharide production from microcrystalline cellulose

Lasse K. Tolonen, Minna Juvonen, Klaus Niemelä, Atte Mikkelson et autres

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O-Acetylation of glucuronoxylan in Arabidopsis thaliana wild type and its change in xylan biosynthesis mutants

Sun‐Li Chong, Liisa Virkki, Hannu Maaheimo, Minna Juvonen et autres

O-Acetylglucuronoxylans (AcGX) in Arabidopsis thaliana carry acetyl residues on the 2-O and/or 3-O positions of the xylopyranosyl (Xylp) units, but the distribution of different O-acetylated Xylp units is partly unclear. We studied a possible correlation of xylan acetylation and the activities of …

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