Results 41 to 50 of about 486,624 (356)

Recent Progresses in Stable Isotope Analysis of Cellulose Extracted from Tree Rings

Plants, 2021
In this work, the challenges and progression in stable isotope investigation, from the analytical tools and technical sample preparation procedures to the dendroclimatological experiments, were reviewed in terms of their use to assess tree physiological ...
Silviu-Laurentiu Badea, Oana Romina Botoran, Roxana Elena Ionete   +2 more
doaj   +1 more source

Isotope analysis in the transmission electron microscope

Nature Communications, 2016
AbstractThe Ångström-sized probe of the scanning transmission electron microscope can visualize and collect spectra from single atoms. This can unambiguously resolve the chemical structure of materials, but not their isotopic composition. Here we differentiate between two isotopes of the same element by quantifying how likely the energetic imaging ...
Toma Susi, Christoph Hofer, Giacomo Argentero, Gregor T. Leuthner, Timothy J. Pennycook, Clemens Mangler, Jannik C. Meyer, Jani Kotakoski   +7 more
openaire   +7 more sources

A Fully Automated Chemical Separation and Purification System and Its Application to Isotope Analysis

Yankuang ceshi, 2020
BACKGROUND Critical problems such as ion diffusion and uncontrollable flow rate exist when applying the traditional natural flow chromatography column method to isotope analysis. The proposed automated chemical purification system improves the efficiency
ZHU Zhi-yong, ZHU Xiang-kun, YANG Tao
doaj   +1 more source

Isotope analysis in central heavy ion collisions at intermediate energies [PDF]

, 2006
Symmetry energy is a key quantity in the study of the equation of state of asymmetric nuclear matter. Heavy ion collisions at low and intermediate energies, performed at Laboratori Nazionali di Legnaro and Laboratori Nazionali del Sud, can be used to ...
:, Abbondanno, U., Bardelli, L., Barlini, S., Bini, M., Bruno, M., Cannata, F., Casini, G., Chiari, M., Collaboration, NUCL-EX, D'Agostino, M., DeSanctis, J., Geraci, E., Giussani, A., Gramegna, F., Kravchuk, V. L., Lanchais, A. L., Marini, P., Moroni, A., Nannini, A., Olmi, A., Ordine, A., Pasquali, G., Piantelli, S., Poggi, G., Vannini, G.   +25 more
core   +2 more sources

Amount‐dependent isotopic fractionation during compound‐specific isotope analysis [PDF]

Rapid Communications in Mass Spectrometry, 2003
AbstractThe performance of a gas chromatography‐combustion‐isotope ratio mass spectrometry system (GC‐C‐IRMS) with respect to the dependence of δ13C values on the amount of sample is presented. Particular attention is paid to the localization of the amount‐dependent isotopic fractionation within the system. Injection experiments with varying amounts of
Schmitt, Jochen, Glaser, B., Zech, W.
openaire   +4 more sources

Thermostable neutral metalloprotease from Geobacillus sp. EA1 does not share thermolysin's preference for substrates with leucine at the P1′ position

FEBS Letters, EarlyView.
Knowing how proteases recognise preferred substrates facilitates matching proteases to applications. The S1′ pocket of protease EA1 directs cleavage to the N‐terminal side of hydrophobic residues, particularly leucine. The S1′ pocket of thermolysin differs from EA's at only one position (leucine in place of phenylalanine), which decreases cleavage ...
Grant R. Broomfield, Torsten Kleffmann, David J. Saul, Sigurd M. Wilbanks   +3 more
wiley   +1 more source

Impact of the Lorentz force on electron track structure and early DNA damage yields in magnetic resonance-guided radiotherapy

Scientific Reports, 2022
Magnetic resonance-guided radiotherapy (MRgRT) has been developed and installed in recent decades for external radiotherapy in several clinical facilities.
Yoshie Yachi, Takeshi Kai, Yusuke Matsuya, Yuho Hirata, Yuji Yoshii, Hiroyuki Date   +5 more
doaj   +1 more source

Structural dynamics of the plant hormone receptor ETR1 in a native‐like membrane environment

FEBS Letters, EarlyView.
The present study unveils the structural and signaling dynamics of ETR1, a key plant ethylene receptor. Using an optimized nanodisc system and solution NMR, we captured full‐length ETR1 in a native‐like membrane environment. Our findings reveal dynamic domain uncoupling and Cu(I)‐induced rigidification, providing the first evidence of metal‐triggered ...
Moritz Lemke, Nils Alexander Lakomek, Georg Groth   +2 more
wiley   +1 more source

Food fit for a Khan: Stable isotope analysis of the elite Mongol Empire cemetery at Tavan Tolgoi, Mongolia [PDF]

, 2014
The creation and expansion of the Mongol Empire during the thirteenth century A.D. brought with it many changes, both for the conquered peoples and for the conquerors themselves.
Fenner, Jack, Khatanbaatar, Dorjpurev, Tumen, Dashtseveg   +2 more
core   +2 more sources

Spatiotemporal and quantitative analyses of phosphoinositides – fluorescent probe—and mass spectrometry‐based approaches

FEBS Letters, EarlyView.
Fluorescent probes allow dynamic visualization of phosphoinositides in living cells (left), whereas mass spectrometry provides high‐sensitivity, isomer‐resolved quantitation (right). Their synergistic use captures complementary aspects of lipid signaling. This review illustrates how these approaches reveal the spatiotemporal regulation and quantitative
Hiroaki Kajiho, Shin Morioka, Junko Sasaki, Takehiko Sasaki   +3 more
wiley   +1 more source