Results 61 to 70 of about 571,215 (288)

Low-power compact radio galaxies at high angular resolution [PDF]

Proceedings of 8th European VLBI Network Symposium — PoS(8thEVN), 2005
We present sub-arcsecond resolution multi-frequency (8 and 22 GHz) VLA images of five low power compact (LPC) radio sources, and phase referenced VLBA images at 1.6 GHz of their nuclear regions. At the VLA resolution we resolve the structure and identify component positions and flux densities.
GIROLETTI, MARCELLO, GIOVANNINI, GABRIELE, Taylor G. B.   +2 more
openaire   +4 more sources

Adaptaquin is selectively toxic to glioma stem cells through disruption of iron and cholesterol metabolism

Molecular Oncology, EarlyView.
Adaptaquin selectively kills glioma stem cells while sparing differentiated brain cells. Transcriptomic and proteomic analyses show Adaptaquin disrupts iron and cholesterol homeostasis, with iron chelation amplifying cytotoxicity via cholesterol depletion, mitochondrial dysfunction, and elevated reactive oxygen species.
Adrien M. Vaquié, Davod R. Shah, Eliane E. S. Brechbühl, Michael McNicholas, Zhaoyang Xu, John H. Stockley, Laura Morcom, Diana Gold Diaz, Gemma C. Girdler, Rachel V. Seear, Gabriel Balmus, Rajiv R. Ratan, Harry Bulstrode, James A. Nathan, Manav Pathania, Kevin M. Brindle, David H. Rowitch   +16 more
wiley   +1 more source

Eighteen Exoplanet Host Stars from the NPOI Data Archive

The Astronomical Journal
During the course of publishing angular diameters from the Navy Precision Optical Interferometer data archive, we found we had data on 17 confirmed exoplanet host stars and 1 exoplanet candidate (HD 20902/ α Per). Here, we update our previously published
Ellyn K. Baines, Jeremy Jones, James H. Clark III, Henrique R. Schmitt, Jordan M. Stone   +4 more
doaj   +1 more source

The Haystack Telescope as an Astronomical Instrument

Galaxies, 2023
The Haystack Telescope is an antenna with a diameter of 37 m and an elevation-dependent surface accuracy of ≤100μm that is capable of millimeter-wave observations.
Jens Kauffmann, Ganesh Rajagopalan, Kazunori Akiyama, Vincent Fish, Colin Lonsdale, Lynn D. Matthews, Thushara G.S. Pillai   +6 more
doaj   +1 more source

Peroxidasin enables melanoma immune escape by inhibiting natural killer cell cytotoxicity

Molecular Oncology, EarlyView.
Peroxidasin (PXDN) is secreted by melanoma cells and binds the NK cell receptor NKG2D, thereby suppressing NK cell activation and cytotoxicity. PXDN depletion restores NKG2D signaling and enables effective NK cell–mediated melanoma killing. These findings identify PXDN as a previously unrecognized immune evasion factor and a potential target to improve
Hsu‐Min Sung, David Bickel, Lena C. M. Krause, Daria Ezeriņa, Christian Ickes, Julian Wojtachnia, Christine S. Gibhardt, Magdalena Shumanska, Khadija Wahni, Andrea Paluschkiwitz, Julia Malo Pueyo, Ekaterina Baranova, Wim Vranken, Hedwig Stanisz, Ioana Stejerean‐Todoran, Michael P. Schön, Joris Messens, Ivan Bogeski   +17 more
wiley   +1 more source

Sub-Airy disk angular resolution with high dynamic range in the near-infrared

EPJ Web of Conferences, 2011
Lunar occultations (LO) are a simple and effective high angular resolution method, with minimum requirements in instrumentation and telescope time. They rely on the analysis of the diffraction fringes created by the lunar limb.
Richichi A.
doaj   +1 more source

Sensor for the Characterization of 2D Angular Actuators with Picoradian Resolution and Nanoradian Accuracy with Microradian Range

Sensors, 2020
High precision angular actuators are used for high demanding applications such as laser steering for photolithography. Piezo technology allows developing actuators with a resolution as low as a few nanoradians, with bandwidths as high as several ...
Marco Pisani, Milena Astrua, Srijith Bangaru Thirumalai Raj   +2 more
doaj   +1 more source

High-resolution x-ray telescopes

, 2010
High-energy astrophysics is a relatively young scientific field, made possible by space-borne telescopes. During the half-century history of x-ray astronomy, the sensitivity of focusing x-ray telescopes-through finer angular resolution and increased ...
Brissenden, R. J., Davis, W. N., Elsner, R. F., Elvis, M., Freeman, M., Gaetz, T., Gorenstein, P., Gubarev, M. V., Jerius, D., Juda, M., Kolodziejczak, J. J., Murray, S., O'Dell, S. L., Petre, R., Podgorski, W., Ramsey, B. D., Reid, P. B., Saha, T., Schwartz, D. A., Trolier-McKinstry, S., Weisskopf, M. C., Wilke, R. H. T., Wolk, S., Zhang, W. W.   +23 more
core   +1 more source

Laser interference lithography with highly accurate interferometric alignment [PDF]

, 2005
It is shown experimentally that in laser interference lithography, by using a reference grating, respective grating layers can be positioned with high relative accuracy.
Hoekstra, Hugo J.W.M., Lambeck, Paul V., Ridder, René M. de, Soest, Frank J. van, Wolferen, Henk A.G.M. van, Wörhoff, Kerstin   +5 more
core   +4 more sources

High Angular Resolution Observations of Protostellar Disks [PDF]

Symposium - International Astronomical Union, 1994
The existence of circumstellar disks around young stellar objects like T Tauri stars is now well accepted. Such disks would have solar system sizes and, at the distance of the nearest star forming cloud, an angular diameter of 0.01 to 1 arcsecond at most, requiring very high angular resolution to be detected.
J.-L. Monin, J. Bouvier, F. Malbet
openaire   +1 more source