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Jean Ann Wyer

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Articles 14
Citations 37
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Recent Articles
1.
Wyer J, Kristensen M, Jones N, Vronning Hoffmann S, Nielsen S
Phys Chem Chem Phys . 2014 Aug; 16(35):18827-39. PMID: 25078080
The hybridisation and melting of DNA strands are critical steps in many biological processes, but still a deeper understanding of the kinetics is lacking. This is evident from the absence...
2.
Wyer J, Nielsen S
Angew Chem Int Ed Engl . 2012 Sep; 51(41):10256-60. PMID: 22965621
No abstract available.
3.
Wyer J, Stochkel K, Nielsen S
J Chem Phys . 2012 Mar; 136(8):084303. PMID: 22380038
In this article, we show that photoexcitation of radical anions facilitates electron transfer from sodium atoms in femtosecond encounters. Thus, excitation of 7,7,8,8-tetracyano-p-quinodimethane (TCNQ) and fluorinated TCNQ (TCNQ-F(4)) anions to...
4.
Jensen C, Wyer J, Houmoller J, Hvelplund P, Nielsen S
Phys Chem Chem Phys . 2011 Aug; 13(41):18373-8. PMID: 21826349
Electron capture by doubly charged peptide cations leads to neutral losses in addition to N-C(α) bond cleavages that give c and z fragments. In this work we discuss the influence...
5.
Jensen C, Wyer J, Nielsen S
Phys Chem Chem Phys . 2010 Sep; 12(40):12961-3. PMID: 20820577
Charge partitioning after electron capture induced dissociation of dipeptide dications is determined by proton mobility in the evanescent ion-molecule complex as the remaining proton has enough time to choose the...
6.
Wyer J, Nielsen S
J Chem Phys . 2010 Sep; 133(8):084306. PMID: 20815568
Absorption by heme proteins is determined by the heme microenvironment that is often vacuumlike (hydrophobic pocket). Here we provide absorption spectra in the Q-band region of isolated ferric heme(+) and...
7.
Stochkel K, Wyer J, Suhr Kirketerp M, Nielsen S
J Am Soc Mass Spectrom . 2010 Aug; 21(11):1884-8. PMID: 20696594
Here we demonstrate that pump-probe experiments can be carried out on microsecond to millisecond timescales using an electrostatic ion storage ring. As a test case, we have chosen protoporhyrin IX...
8.
Wyer J, Feketeova L, Nielsen S, OHair R
Phys Chem Chem Phys . 2010 May; 11(39):8752-8. PMID: 20449019
Betaine [(CH(3))(3)N(+)CH(2)COO(-)] is a methylated version of glycine and is a zwitterion in its neutral form. In this work, we have subjected protonated betaine, (+)(CH(3))(3)NCH(2)COOH, to a range of fragmentation...
9.
Ehlerding A, Wyer J, Zettergren H, Suhr Kirketerp M, Nielsen S
J Phys Chem A . 2009 Dec; 114(1):299-303. PMID: 19958010
Photodissociation of protonated GW, WG (G = glycine, W = tryptophan), and their complexes with 18-crown-6-ether (CE) was performed in an electrostatic ion storage ring using a tunable laser system....
10.
Wyer J, Cederquist H, Haag N, Huber B, Hvelplund P, Johansson H, et al.
Eur J Mass Spectrom (Chichester) . 2009 Nov; 15(6):681-8. PMID: 19940334
In this work, we have subjected protonated nucleobases MH(+) (M = guanine, adenine, thymine, uracil and cytosine) to a range of experiments that involve high-energy (50 keV) collision induced dissociation...