Results 51 to 60 of about 568,795 (292)

Metformin promotes mitochondrial integrity through AMPK‐signaling in Leber's hereditary optic neuropathy

FEBS Open Bio, EarlyView.
Metformin mediates mitochondrial quality control in Leber's hereditary optic neuropathy (LHON) fibroblasts carrying mtDNA mutations. At therapeutic levels, metformin activates AMPK signaling to restore mitochondrial dynamics by promoting fusion and restraining fission, while preserving mitochondrial mass, enhancing autophagy/mitophagy and biogenesis ...
Chatnapa Panusatid, Rapasviranda Soiyangsuk, Maneeluck Tanadjindarat, Chayanon Peerapittayamongkol   +3 more
wiley   +1 more source

Obtaining the diffusion coefficient for cosmic ray propagation in the Galactic Centre Ridge through time-dependent simulations of their gamma-ray emission

, 2008
Recent observations by the H.E.S.S. collaboration of the Galactic Centre region have revealed what appears to be gamma-ray emission from the decay of pions produced by interactions of recently accelerated cosmic rays with local molecular hydrogen clouds.
Dimitrakoudis, Stavros, Geranios, Athanasios, Mastichiadis, Apostolos   +2 more
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

Study on Liquid Hydrogen Leakage and Diffusion Behavior in a Hydrogen Production Station

Fire
Liquid hydrogen storage is an important way of hydrogen storage and transportation, which greatly improves the storage and transportation efficiency due to the high energy density but at the same time brings new safety hazards.
Xiang Fu, Guodong Li, Shiyu Chen, Chunyan Song, Zhili Xiao, Hao Luo, Jiaqi Wan, Tianqi Yang, Nianfeng Xu, Jinsheng Xiao   +9 more
doaj   +1 more source

Microstructure Anisotropy Effect on Stress and Hydrogen Distribution in Micro Area for Martensitic Stainless Steel

Cailiao gongcheng, 2016
Elastic stiffness distribution of martensite microstructure was analyzed by using Electron Back Scatter Diffraction(EBSD) experiment, based on which the coupled finite element model of stress-hydrogen interaction was established to study the influence of
ZHONG Zhen-qian, TIAN Zhi-ling, YANG Chun   +2 more
doaj   +1 more source

HYDROGEN DIFFUSION IN HCP Zr

Anales (Asociación Física Argentina), 2022
We study the behavior of hydrogen (H) in the α and β phases of Zr and in the β phase of Nb, using the Siesta and Vasp first principles codes based on the density functional theory (DFT).
C. García, V. P. Ramunni
doaj   +1 more source

Interaction of Atomic and Molecular Hydrogen with Tholin Surfaces at Low Temperatures

, 2010
We study the interaction of atomic and molecular hydrogen with a surface of tholin, a man-made polymer considered to be an analogue of aerosol particles present in Titan's atmosphere, using thermal programmed desorption at low temperatures below 30 K ...
Biham, Ofer, Frank, Yechiel, Li, Ling, Lohmar, Ingo, Perets, Hagai B., Vidali, Gianfranco, Zhao, Hui   +6 more
core   +1 more source

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

Modeling bulk diffusion of hydrogen in X70 pipeline steel

Scientific Reports
Hydrogen bulk diffusion and saturation of X70 pipeline steel was investigated by employing high-pressure gaseous hydrogen charging, thermal desorption analysis/spectroscopy (TDA/TDS) and numerical modeling/simulation of bulk diffusion. The trapping model
Andreas Drexler, Sergio Pastore, Josef Domitner   +2 more
doaj   +1 more source

Compensation of the Meyer‐Neldel Compensation Law for H diffusion in minerals

Geochemistry, Geophysics, Geosystems, 2014
The Meyer‐Neldel Rule (MNR), or compensation law, linearly relates the preexponent term to the logarithm of the excitation enthalpy for any process that is thermally driven in an Arrhenian manner, and MNR fits can be used to calibrate and validate ...
Alan G. Jones
doaj   +1 more source