TY  - GEN
A1  - Olejko, Lydia
A1  - Cywiński, P. J.
A1  - Bald, Ilko
T1  - An ion-controlled four-color fluorescent telomeric switch on DNA origami structures
N2  - The folding of single-stranded telomeric DNA into guanine (G) quadruplexes is a conformational change that plays a major role in sensing and drug targeting. The telomeric DNA can be placed on DNA origami nanostructures to make the folding process extremely selective for K+ ions even in the presence of high Na+ concentrations. Here, we demonstrate that the K+-selective G-quadruplex formation is reversible when using a cryptand to remove K+ from the G-quadruplex. We present a full characterization of the reversible switching between single-stranded telomeric DNA and G-quadruplex structures using Förster resonance energy transfer (FRET) between the dyes fluorescein (FAM) and cyanine3 (Cy3). When attached to the DNA origami platform, the G-quadruplex switch can be incorporated into more complex photonic networks, which is demonstrated for a three-color and a four-color FRET cascade from FAM over Cy3 and Cy5 to IRDye700 with G-quadruplex-Cy3 acting as a switchable transmitter.
T3  - Zweitveröffentlichungen der Universität Potsdam : Mathematisch-Naturwissenschaftliche Reihe - 254 
KW  - resonance energy-transfer
KW  - g-quadruplex
KW  - quantum dots
KW  - strand breakage
KW  - photonic wires
KW  - 3-color fret
KW  - nanostructures
KW  - recognition
KW  - sensitivity
KW  - assemblies
Y1  - 2016
U6  - http://nbn-resolving.de/urn/resolver.pl?urn:nbn:de:kobv:517-opus4-95831
SP  - 10339
EP  - 10347
ER  - 
TY  - GEN
A1  - Bhatara, Anjali
A1  - Laukka, Petri
A1  - Boll-Avetisyan, Natalie
A1  - Granjon, Lionel
A1  - Elfenbein, Hillary Anger
A1  - Bänziger, Tanja
T1  - Second language ability and emotional prosody perception
T2  - Postprints der Universität Potsdam : Humanwissenschaftliche Reihe
N2  - The present study examines the effect of language experience on vocal emotion perception in a second language. Native speakers of French with varying levels of self-reported English ability were asked to identify emotions from vocal expressions produced by American actors in a forced-choice task, and to rate their pleasantness, power, alertness and intensity on continuous scales. Stimuli included emotionally expressive English speech (emotional prosody) and non-linguistic vocalizations (affect bursts), and a baseline condition with Swiss-French pseudo-speech. Results revealed effects of English ability on the recognition of emotions in English speech but not in non-linguistic vocalizations. Specifically, higher English ability was associated with less accurate identification of positive emotions, but not with the interpretation of negative emotions. Moreover, higher English ability was associated with lower ratings of pleasantness and power, again only for emotional prosody. This suggests that second language skills may sometimes interfere with emotion recognition from speech prosody, particularly for positive emotions.
T3  - Zweitveröffentlichungen der Universität Potsdam : Humanwissenschaftliche Reihe - 503 
KW  - recognizing emotions
KW  - basic emotions
KW  - recognition
KW  - language
KW  - vocalizations
KW  - speech
KW  - models
Y1  - 2019
U6  - http://nbn-resolving.de/urn/resolver.pl?urn:nbn:de:kobv:517-opus4-411860
SN  - 1866-8364
IS  - 503
ER  -