Results 41 to 50 of about 440,979 (305)

A methionine‐lined active site governs carbocation stabilization and product specificity in a bacterial terpene synthase

FEBS Letters, EarlyView.
This study reveals a unique active site enriched in methionine residues and demonstrates that these residues play a critical role by stabilizing carbocation intermediates through novel sulfur–cation interactions. Structure‐guided mutagenesis further revealed variants with significantly altered product profiles, enhancing pseudopterosin formation. These
Marion Ringel, Carl P. O. Helmer, Shani Zev, Ronja Driller, Emily Buhr, Markus Reinbold, Renana Schwartz, Gabriel Foley, Mikael Boden, Daniel Garbe, Gerhard Schenk, Dan Thomas Major, Bernhard Loll, Thomas Brück   +13 more
wiley   +1 more source

Review of Electronic Cooling and Thermal Management in Space and Aerospace Applications

Engineering Proceedings
The continuous miniaturization of electronics, high processing capacity, compact microelectronic devices, and high circuit density contribute to an increasing demand for the efficient cooling of electronics.
Kivilcim Ersoy
doaj   +1 more source

Cooling of mechanical motion with a two level system: the high temperature regime

, 2010
We analyze cooling of a nano-mechanical resonator coupled to a dissipative solid state two level system focusing on the regime of high initial temperatures.
Rabl, P.
core   +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

Startup Characteristics and Thermal Instability of a Visual Loop Heat Pipe Under Acceleration Force

Aerospace
Loop heat pipes are efficiently two-phase heat transfer devices in the field of aircraft thermal management. To investigate the startup behavior and thermal instability of loop heat pipes under acceleration force, this study designed a novel loop heat ...
Lijun Chen, Yongqi Xie, Longzhu Han, Huifeng Kang, Hongwei Wu   +4 more
doaj   +1 more source

Heat transfer enhancement of a microchannel cooler with V-shaped partitions

International Journal of Thermofluids, 2023
The ongoing evolution of electronic systems that operate under extreme conditions has led to persistent concern about potential failures caused by escalating temperature levels which provokes the decline the operating quality.
El Bachir Lahmer, Jaouad Benhamou, Mostafa Amine Elouazzani, Mohammed Amine Moussaoui, Ahmed Mezrhab   +4 more
doaj   +1 more source

Vibrational cooling and thermoelectric response of nanoelectromechanical systems [PDF]

, 2014
An important goal in nanoelectromechanics is to cool the vibrational motion, ideally to its quantum ground state. Cooling by an applied charge current is a particularly simple and hence attractive strategy to this effect. Here, we explore this phenomenon
Arrachea, Liliana, Bode, Niels, von Oppen, Felix   +2 more
core   +3 more sources

Evolutionarily divergent DUF4465 domains have a common vitamin B12‐binding function

FEBS Open Bio, EarlyView.
We show that DUF4465 family proteins, widespread across bacteria from gut microbiomes, hydrothermal vents, and soil, share a common vitamin B12‐binding function. These augmented β‐jellyroll proteins bind vitamin B12 via extended loops. Our findings establish sequence‐diverse DUF4465 proteins as a widespread class of B12‐binding proteins, highlighting ...
Charlea Clarke, Michal Banasik, Rokas Juodeikis, Martin J. Warren, Richard W. Pickersgill   +4 more
wiley   +1 more source

Observation of vacancy-induced suppression of electronic cooling in defected graphene

, 2014
Previous studies of electron-phonon interaction in impure graphene have found that static disorder can give rise to an enhancement of electronic cooling.
Chen, Yi, Han, Qi, Liu, Gerui, Wu, Xiaosong, Yu, Dapeng   +4 more
core   +1 more source

Cooling rate for microbunched electron cooling without amplification [PDF]

Physical Review Accelerators and Beams, 2018
The Microbunched Electron Cooling (MBEC) proposed by D. Ratner is a promising cooling technique that can find applications in future hadron and electron-ion colliders. In this paper, we develop a new framework for the study of MBEC which is based on the analysis of the dynamics of microscopic 1D fluctuations in the electron and hadron beams during ...
openaire   +3 more sources