Results 51 to 60 of about 5,737,181 (292)

Artificial molecular machines and motors—Design and control of nanoscale motion

FEBS Letters, EarlyView.
Molecules are constantly moving because of thermal fluctuations, but random motion alone cannot be exploited to perform directional tasks. Artificial molecular machines use chemical, electrical, or light energy to bias this motion. Molecular shuttles, rotary motors, and supramolecular pumps illustrate how nanoscale movement can be controlled and ...
Leonardo Andreoni, Alberto Credi
wiley   +1 more source

Invisible but not inaccessible—Revealing transient oligomers formed by intrinsically disordered proteins with solution NMR and complementary methods

FEBS Letters, EarlyView.
Transient oligomers formed by intrinsically disordered proteins may be ‘invisible’ to direct detection yet remain accessible to solution NMR through equilibrium‐exchange measurements and pressure‐jump experiments. Complementary methods report on mass, stoichiometry, selected distance distributions, morphology, and internal packing.
Martin D. Gelenter, Ad Bax
wiley   +1 more source

A Study of the Ionospheric Electron Measurement on the Medium-sized Scientific Rocket, KSR-II [PDF]

Journal of Astronomy and Space Sciences, 1998
This paper reports the results obtained from the Langmuir probe (LP) and Electron Temperature Probe (ETP) experiments on the sounding rocket KSR-II (Korean Scientific Rocket - II) which was launched on Jun 11, 1998 at 10:00 KST from Tae-An peninsula (37 ...
Jae-Jin Lee, Jhoon Kim, Soo-Jin Lee, Kyoung-Wook Min, You Surn Pyo, Gwang Rae Cho, Hwang-Jae Rhee   +6 more
doaj  

Self-consistent modelling of the daytime electron density profile in the ionospheric F region [PDF]

Annales Geophysicae, 1997
A theoretical self-consistent method for the description of daytime Ne(h) profiles in the ionospheric F region measured by EISCAT is proposed. It is based on the use of a theoretical F-region model and measured electron density, Ne(h), electron, Te(h)
A. Mikhailov, A. Mikhailov, K. Schlegel
doaj   +1 more source

Mechanisms and therapeutic opportunities of the ribotoxic stress response in cancer

Molecular Oncology, EarlyView.
Cancer cells' high translational demand creates opportunities to therapeutically target ribosome function. Ribosome stalling and collisions activate ZAKα and the ribotoxic stress response (RSR), which can trigger rapid, p53‐independent apoptosis in cancer.
Anastassiya Kim, Maryam Aslam, Elouise Torruella, Alphons Sony, Asif Rahman, Simira Smith, Columba de la Parra, Moira Sauane   +7 more
wiley   +1 more source

Laser Wakefield Electron Acceleration in a Periodically Modulated Plasma Density Profile

Plasma
We investigate laser wakefield electron acceleration in a periodic plasma density profile using 2D PIC simulations with the EPOCH code. The profile of the electron density has the form n(x)=n01+δsin2πx/x0, where n0 is the steady electron density, x0=100m
Rareș Iovănescu, Radu P. Daia, Anana C. Gîrlea, Emil I. Slușanschi, Cătălin M. Ticoș   +4 more
doaj   +1 more source

Mechanisms to control laser-plasma coupling in laser wakefield electron acceleration

Physical Review Accelerators and Beams, 2022
Experimental results, supported by precise modeling, demonstrate optimization of a plasma-based injector with intermediate laser pulse energy (
L. T. Dickson, C. I. D. Underwood, F. Filippi, R. J. Shalloo, J. Björklund Svensson, D. Guénot, K. Svendsen, I. Moulanier, S. Dobosz Dufrénoy, C. D. Murphy, N. C. Lopes, P. P. Rajeev, Z. Najmudin, G. Cantono, A. Persson, O. Lundh, G. Maynard, M. J. V. Streeter, B. Cros   +18 more
doaj   +1 more source

Polarization‐resolved femtosecond Vis/IR spectroscopy tailored for resolving weak signals in biological samples using minimal sample volume

FEBS Open Bio, EarlyView.
Unique biological samples, such as site‐specific mutant proteins, are available only in limited quantities. Here, we present a polarization‐resolved transient infrared spectroscopy setup with referencing to improve signal‐to‐noise tailored towards tracing small signals. We provide an overview of characterizing the excitation conditions for polarization‐
Clark Zahn, Karsten Heyne
wiley   +1 more source

Study of electron density and pressure profile behavior in a tokamak plasma [PDF]

, 1989
Simultaneous determinations of local electron density and magnetic flux surface in a tokamak plasma have been made feasible with multichannel interferometry using a new asymmetric Abel inversion method.
H.K. Park, G. Taylor, Taylor, G., R.J. Goldston, Park, H.K., Goldston, R.J.   +5 more
core   +1 more source

A light‐triggered Time‐Resolved X‐ray Solution Scattering (TR‐XSS) workflow with application to protein conformational dynamics

FEBS Open Bio, EarlyView.
Time‐resolved X‐ray solution scattering captures how proteins change shape in real time under near‐native conditions. This article presents a practical workflow for light‐triggered TR‐XSS experiments, from data collection to structural refinement. Using a calcium‐transporting membrane protein as an example, the approach can be broadly applied to study ...
Fatemeh Sabzian‐Molaei, Fredrik Orädd, Konstantinos Magkakis, Magnus Andersson   +3 more
wiley   +1 more source