Results 81 to 90 of about 95,067 (301)

Impurity Analysis and Microstructure Along the Climatic Transition From MIS 6 Into 5e in the EDML Ice Core Using Cryo-Raman Microscopy

Frontiers in Earth Science, 2019
Impurities in polar ice cores have been studied so far mainly for the purpose of reconstructions of past atmospheric aerosol concentrations. However, impurities also critically influence physical properties of the ice matrix itself.
Jan Eichler, Jan Eichler, Christian Weikusat, Anna Wegner, Birthe Twarloh, Melanie Behrens, Hubertus Fischer, Maria Hörhold, Daniela Jansen, Sepp Kipfstuhl, Urs Ruth, Frank Wilhelms, Frank Wilhelms, Ilka Weikusat, Ilka Weikusat   +14 more
doaj   +1 more source

Disorder Analysis in Infrared Spectroscopy of Acetylene Ice

The Journal of Physical Chemistry A
A new method to investigate disorder in ice films is proposed and applied to acetylene ice. It is based on a quantitative analysis of the infrared spectrum data, which includes: the Brendel-Bormann model for the material's dielectric function; molecular vibration modes calculated by density functional theory (DFT); a monomer-dimer model for amorphous ...
S. L. A. Mello, R. C. Pereira, C. F. S. Codeço, R. Martinez, E. F. da Silveira, M. M. Sant’Anna   +5 more
openaire   +2 more sources

Time‐restricted feeding prior to Mycobacterium tuberculosis infection reduces tissue CD4+ T cells with limited impact on bacterial clearance

FEBS Open Bio, EarlyView.
Time‐restricted feeding (TRF) in mice increased liver fatty acid oxidation and decreased fatty acid biosynthesis. These alterations persisted when TRF was discontinued and the host was infected with Mycobacterium tuberculosis. Pre‐exposure to TRF did not alter tissue (lung and spleen) mycobacterial burden but significantly reduced CD3+ T cells in lungs
Ashish Gupta, Nidhi Yadav, Subhasmita Das, R. Rajendra Kumar Reddy, Nupur Sharma, Amol Ratnakar Suryawanshi, Jaswinder Singh Maras, Ranjan Kumar Nanda   +7 more
wiley   +1 more source

Detection of Aerobic Bacterial Endospores: From Air Sampling, Sterilization Validation to Astrobiology [PDF]

, 2008
Bacterial endospores are formed in genera such as Bacillus and Clostridium in times of incipient stresses. Derivative of their remarkable resistance and ubiquity, endospores are delivery vehicles for anthrax attack, biological indicators for checking ...
Yung, Pun To (Douglas)
core   +1 more source

Absorption Coefficients of Condensed O2: Application to Ganymede

The Planetary Science Journal
Two absorption features in the visible reflectance spectra of the icy Galilean satellites are associated with dense phase molecular oxygen (O _2 ). These were identified from ground-based and Hubble Space Telescope data on Ganymede, Europa, and Callisto.
Wendy M. Calvin
doaj   +1 more source

A Continuous Cryosphere Index for Snow and Ice Reflectance

Remote Sensing
Because of high visible and near-infrared (VNIR) reflectance, and deep shortwave infrared (SWIR) absorption, snow and ice are unique among terrestrial land cover.
Christopher Small
doaj   +1 more source

Hyperactive ice‐binding proteins stabilize cell membranes and improve resistance to dehydration stress in Caenorhabditis elegans

FEBS Open Bio, EarlyView.
TisIBP8, a fungal‐derived hyperactive ice‐binding protein, helps Caenorhabditis elegans survive dehydration. It localizes near cell membranes, reduces cell damage, and helps maintain membrane structure during drying. These results suggest that ice‐binding proteins can protect cells from dehydration stress as well as freezing stress.
Daiki Shimose, Kotaro Ozaki, Ryohei Kuriyama, Yuka Ikemoto, Kazuhiro Mio, Yuji C. Sasaki, Tatsuya Arai, Sakae Tsuda, Yoichi Shinkai, Masahiro Kuramochi   +9 more
wiley   +1 more source

Molecular characterization of covRS mutations in M1UK Streptococcus pyogenes

FEBS Open Bio, EarlyView.
Group A Streptococcus (GAS) acquires covRS mutations driving a hypervirulent bacterial state, frequently associated with invasive disease‐like necrotizing fasciitis. We demonstrate that the newly emerged M1UK GAS lineage can also acquire these mutations.
Jarrad Pritchard, Emma‐Jayne Proctor, Jiawa Wang, Nikolas P. Johnston, Andrew Hayes, Georgia McCorkell, Haibo Yu, Jai Tree, Mark R. Davies, Mark J. Walker, Ronald Sluyter, Stephan Brouwer, Martina L. Sanderson‐Smith   +12 more
wiley   +1 more source

Plasma EV Proteomics Identifies ECM Remodeling and Inflammatory Proteins LUM and C7 as Candidate Biomarkers in FSHD

Annals of Clinical and Translational Neurology, EarlyView.
ABSTRACT Objective Facioscapulohumeral muscular dystrophy (FSHD) is one of the most debilitating and common muscular dystrophies. Despite its severity, no approved therapy exists for FSHD patients. However, several therapeutic candidates are currently under development, and some have recently entered clinical trials, marking the need for reliable ...
Mustafa Bilal Bayazit, Chiranth K. Nagaraj, Jackson S. Newell, Kim Truc Nguyen, Xilal Y. Rima, Jacob Doon‐Ralls, Eduardo Reátegui, Jeffrey M. Statland, Rabi Tawil, Kevin M. Flanigan, Scott Q. Harper, Nizar Y. Saad   +11 more
wiley   +1 more source

Photolysis and Sublimation Chemistry of Ammonium Cyanide with Relevance to Cometary Environments

The Planetary Science Journal
Bulk nitrogen is depleted in solar system objects, including the terrestrial planets, chondritic meteorites, and comets. Recently, it was suggested that cometary nitrogen may be locked up in ammonium salts—ionic solids comprising ammonia (NH _3 ) and an ...
O. H. Wilkins, K. M. Yocum, V. J. Esposito, E. Harel, S. N. Milam, P. A. Gerakines   +5 more
doaj   +1 more source