Results 91 to 100 of about 3,896,846 (293)

JWST-TST High Contrast: JWST/NIRCam Observations of the Young Giant Planet β Pic b

The Astronomical Journal
We present the first JWST/NIRCam observations of the directly imaged gas giant exoplanet β Pic b. Observations in six filters using NIRCam's round coronagraphic masks provide a high-signal-to-noise-ratio detection of β Pic b and the archetypal debris ...
Jens Kammerer, Kellen Lawson, Marshall D. Perrin, Isabel Rebollido, Christopher C. Stark, Tomas Stolker, Julien H. Girard, Laurent Pueyo, William O. Balmer, Kadin Worthen, Christine Chen, Roeland P. van der Marel, Nikole K. Lewis, Kimberly Ward-Duong, Jeff A. Valenti, Mark Clampin, C. Matt Mountain   +16 more
doaj   +1 more source

Linking neurogenesis, oligodendrogenesis, and myelination defects to neurodevelopmental disruption in primary mitochondrial disorders

FEBS Letters, EarlyView.
Mitochondrial remodeling shapes neural and glial lineage progression by matching metabolic supply with demand. Elevated OXPHOS supports differentiation and myelin formation, while myelin compaction lowers mitochondrial dependence, revealing mitochondria as key drivers of developmental energy adaptation.
Sahitya Ranjan Biswas, Porter L. Tomsick, Alicia M. Pickrell, Paul D. Morton   +3 more
wiley   +1 more source

A First Look with JWST Aperture Masking Interferometry: Resolving Circumstellar Dust around the Wolf–Rayet Binary WR 137 beyond the Rayleigh Limit

The Astrophysical Journal
We present infrared aperture-masking interferometry (AMI) observations of newly formed dust from the colliding winds of the massive binary Wolf–Rayet system WR 137 with JWST using the Near Infrared Imager and Slitless Spectrograph (NIRISS).
Ryan M. Lau, Matthew J. Hankins, Joel Sanchez-Bermudez, Deepashri Thatte, Anthony Soulain, Rachel A. Cooper, Anand Sivaramakrishnan, Michael F. Corcoran, Alexandra Z. Greenbaum, Theodore R. Gull, Yinuo Han, Olivia C. Jones, Thomas Madura, Anthony F. J. Moffat, Mark R. Morris, Takashi Onaka, Christopher M. P. Russell, Noel D. Richardson, Nathan Smith, Peter Tuthill, Kevin Volk, Gerd Weigelt, Peredur M. Williams   +22 more
doaj   +1 more source

Ultra-low contrast coronary angiography and zero-contrast percutaneous coronary intervention for prevention of contrast-induced nephropathy: step-by-step approach and review

Advances in Interventional Cardiology, 2019
Contrast-induced nephropathy is a serious complication after intravascular administration of iodinated contrast media and is associated with numerous adverse outcomes.
Jerzy Sacha, Marek Gierlotka, Piotr Feusette, Dariusz Dudek   +3 more
doaj   +1 more source

Organizing the interface—Plasma membrane architecture and receptor dynamics in virus‐cell interactions

FEBS Letters, EarlyView.
Plasma membranes contain dynamic nanoscale domains that organize lipids and receptors. Because viruses operate at similar scales, this architecture shapes early infection steps, including attachment, receptor engagement, and entry. Using influenza A virus and HIV‐1 as examples, we highlight how receptor nanoclusters, multivalent glycan interactions ...
Jan Schlegel, Christian Sieben
wiley   +1 more source

The MIRI Excesses Around Degenerates (MEAD) Survey. II. A Probable Planet Detected via IR Excess around WD 0644+025

The Astronomical Journal
The MIRI Excesses Around Degenerates (MEAD) Survey is a Cycle 2 JWST program designed to image nearby white dwarfs with MIRI at 10 and 15 μ m. This survey targeted 56 white dwarfs within 25 pc to search for mid-infrared excesses, flux deficits from ...
Sabrina Poulsen, John Debes, Ashley Messier, Érika Le Bourdais, Carl Melis, Misty Cracraft, Samuel Boucher, Mukremin Kilic, Scott Kenyon, Mark C. Wyatt, Seth Redfield, Patrick Dufour, Loic Albert, Susan E. Mullally, William T. Reach, Fergal Mullally, David A. Golimowski   +16 more
doaj   +1 more source

An efficient super-resolution approach for obtaining isotropic 3-D imaging using 2-D multi-slice MRI

Egyptian Informatics Journal, 2013
An approach for obtaining both a high-resolution and high-contrast 3D MRI image volume, desirable for image-guided minimally invasive brain surgery, is proposed. Current MRI imaging techniques, especially in situations where contrast requirements dictate
Alaa A. Hefnawy
doaj   +1 more source

Waveguide-mode interference lithography technique for high contrast subwavelength structures in the visible region

Optics Express, 2014
We explore possibilities of waveguide-mode interference lithography (WMIL) technique for high contrast subwavelength structures in the visible region. Selecting an appropriate waveguide-mode, we demonstrate high contrast resist mask patterns for the first time.
K. Kusaka, H. Kurosawa, S. Ohno, Y. Sakaki, K. Nakayama, Y. Moritake, T. Ishihara   +6 more
openaire   +3 more sources

pH‐mediated activation of the lysosomal arginine sensor SLC38A9

FEBS Letters, EarlyView.
Cells monitor nutrient levels via the lysosomal transporter SLC38A9 to activate the mechanistic target of rapamycin complex 1 (mTORC1). This study reveals that SLC38A9 function is regulated by pH. We identified histidine 544 as a critical pH sensor that undergoes conformational changes to control amino acid efflux from lysosomes; therefore, it ...
Xuelang Mu, Ampon Sae Her, Tamir Gonen
wiley   +1 more source

A Second Visit to Eps Ind Ab with JWST: New Photometry Confirms Ammonia and Suggests Thick Clouds in the Exoplanet Atmosphere of the Closest Super-Jupiter

The Astrophysical Journal Letters
With JWST, we are directly imaging cold (∼200–300 K) solar-age giant exoplanets for the first time. At these temperatures, many molecular features appear, and water-ice clouds may condense and affect the emission spectrum; early photometric measurements ...
Elisabeth C. Matthews, James Mang, Aarynn L. Carter, Mathlide Mâlin, Caroline V. Morley, Bhavesh Rajpoot, Leindert A. Boogaard, Jennifer A. Burt, Ian J. M. Crossfield, Fabo Feng, Anne- Marie Lagrange, Mark W. Phillips   +11 more
doaj   +1 more source