scholarly journals Characterization of a trans–trans Carbonic Acid–Fluoride Complex by Infrared Action Spectroscopy in Helium Nanodroplets

2019 ◽  
Vol 141 (14) ◽  
pp. 5815-5823 ◽  
Author(s):  
Daniel A. Thomas ◽  
Eike Mucha ◽  
Maike Lettow ◽  
Gerard Meijer ◽  
Mariana Rossi ◽  
...  
Keyword(s):  
Carbonic Acid ◽  
Helium Nanodroplets ◽  
Action Spectroscopy ◽  
Fluoride Complex ◽  
Acid Fluoride

scholarly journals Fabrication and characterization of hydrogels formed from designer coiled-coil fibril-forming peptides

RSC Advances ◽  
2017 ◽  
Vol 7 (44) ◽  
pp. 27260-27271 ◽  
Author(s):  
A. F. Dexter ◽  
N. L. Fletcher ◽  
R. G. Creasey ◽  
F. Filardo ◽  
M. W. Boehm ◽  
...  
Keyword(s):  
Carbonic Acid ◽  
Coiled Coil ◽  
Peptide Sequence ◽  
Fabrication And Characterization

A peptide sequence was designed to form α-helical fibrils and hydrogels at physiological pH, utilising transient buffering by carbonic acid.

scholarly journals Probing the conformational landscape and thermochemistry of DNA dinucleotide anions via helium nanodroplet infrared action spectroscopy

2020 ◽  
Vol 22 (33) ◽  
pp. 18400-18413
Author(s):  
Daniel A. Thomas ◽  
Rayoon Chang ◽  
Eike Mucha ◽  
Maike Lettow ◽  
Kim Greis ◽  
...  
Keyword(s):  
Infrared Spectroscopy ◽  
Helium Nanodroplets ◽  
Action Spectroscopy ◽  
Conformational Landscape ◽  
Kinetic Trapping

Kinetic trapping in helium nanodroplets enables measurement of conformer thermochemistry via infrared spectroscopy at 0.4 K.

scholarly journals Characterization of Bottled Waters by Multielemental Analysis, Stable and Radiogenic Isotopes

Water ◽  
2020 ◽  
Vol 12 (9) ◽  
pp. 2454 ◽  
Author(s):  
Tea Zuliani ◽  
Tjaša Kanduč ◽  
Rok Novak ◽  
Polona Vreča
Keyword(s):  
Carbonic Acid ◽  
Water Source ◽  
Major Elements ◽  
Mineral Waters ◽  
Human Consumption ◽  
Geochemical Processes ◽  
Soil Zone ◽  
Low Concentrations ◽  
First Time

Multi-elemental (Ca, Mg, Na, K, Al, As, Ba, Cd, Co, Cr, Cu, Fe, Li, Mn, Mo, Ni, P, Pb, Sb, Se, Tl, V, and Zn) and stable isotope (i.e., δ2H, δ18O, and δ13CDIC) analyses were performed on 13 (8 Slovenian and 5 imported) bottled mineral and spring waters from the Slovenian market. In addition, 87Sr/86Sr isotope ratios were determined for the first time. In all analyzed bottled waters, the majority of elements were present although in low concentrations, and according to EU legislation, all were suitable for human consumption. Also, concentrations of major elements (Ca, Mg, Na, and K) were in general agreement with the values reported on the bottle labels, and any differences were the consequence of the natural variability of the water source used for bottling. The exception was one spring water, for which the source location changed, which was confirmed by the δ2H, δ18O, and δ13CDIC data. Two mineral waters had distinctive elemental compositions due to the particular geology of their recharge areas. The δ13CDIC was also investigated to decipher the carbonate contribution in the bottled waters. The results suggest that dissolution of carbonates and non-equilibrium carbonate dissolution by carbonic acid produced from soil zone CO2 are the predominant geochemical processes influencing the δ13CDIC values of bottled water.

Characterization of laser ablation as a means for doping helium nanodroplets

2003 ◽  
Vol 74 (9) ◽  
pp. 4071-4076 ◽  
Author(s):  
P. Claas ◽  
S.-O. Mende ◽  
F. Stienkemeier
Keyword(s):  
Laser Ablation ◽  
Helium Nanodroplets
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