Results 111 to 120 of about 9,305 (228)
Dust and gas emission from cometary nuclei: the case of comet 67P/Churyumov–Gerasimenko
Advances in Physics: X, 2018 Comets display with decreasing solar distance an increased emission of gas and dust particles, leading to the formation of the coma and tail. Spacecraft missions provide insight into the temporal and spatial variations of the dust and gas sources located
Tobias Kramer +4 more
doaj +1 more source
Assessment of early-modern observations of comets and supernovae: Focus on pre-telescopic European astrometric and physical data [PDF]
, 2004 The two-century period prior to the publication of Newton's Principia (first edition 1687; third edition 1726) was most important in terms of the radical changes that occurred in the observation, perception, and understanding of celestial objects that in
Green, Daniel W. E., Green, Daniel W E
core
JOR SPINE, Volume 9, Issue 2, June 2026.IL‐1β‐preconditioned BM‐MSC‐derived secretome counteracts inflammation‐driven degeneration in hNPCs. BM‐MSCs were preconditioned with IL‐1β (10 ng/mL) for 24 h, and the resulting secretome (BM‐MSCsec) was collected. Degenerative hNPCs cultured in a 3D alginate bead model were exposed to IL‐1β to reproduce an inflammatory degenerative microenvironment ...
Veronica Tilotta +7 more
wiley +1 more source
Nuclear Spectra of Comet 28P Neujmin 1
, 2006 We present visible and near-IR spectra of the nucleus of comet 162P/Siding Spring (also known as 2004 TU12) obtained in 2004 December, while it had no detectable coma.
Ziffer, Julie, PhD +7 more
core
Mapping Immunity With Cutting‐Edge Spatial Biology and Tissue Cytometry Innovations
MedComm, Volume 7, Issue 6, June 2026.This review explores how spatial biology integrates multiplexed imaging and tissue cytometry to reveal immune organization within native tissue contexts. ABSTRACT The immune system operates within organized tissue landscapes, where spatial relationships between cells shape the nature and outcome of immune responses.
Lilibeth Cárdenas‐Piedra +5 more
wiley +1 more source
Salud Pública de México, 2001 Objective. To assess the genotoxic activity of N-nitroso diethylamine (NDEA), maleic hydrazide (MH), and ethyl methane sulfonate (EMS) using two systems: the comet assay on nuclei from Tradescantia, and the pink mutation test on Tradescantia staminal ...
Carlos Alvarez-Moya +5 more
doaj
Redox Regulation and Oxidative Stress in Health and Disease: Mechanisms and Therapeutic Targeting
MedComm – Future Medicine, Volume 5, Issue 2, June 2026.Reactive species serve crucial roles which are tightly regulated in both physiological as well as disease states. At physiological levels, these species are integral to redox signaling, while uncontrolled redox promotes disease pathology. This review examines the dysregulation of these processes.
Mohammad Hossein Azadi +2 more
wiley +1 more source
Tectonics, Volume 45, Issue 6, June 2026.Abstract The 1906 Manas Earthquake is the largest earthquake recorded in the Borohoro Shan (BRS) since 1900. The reported magnitude ranges from 7.2 to 8.3, but uncertainties remain regarding its size, mechanism, and responsible fault. Similar confusion exists for the 1812 Nilke and 1944 Xinyuan Earthquakes, the only other Mw > 7 earthquakes in the NE ...
C.‐H. Tsai +3 more
wiley +1 more source
The Physics of Cometary Nuclei
, 1997 The recent developments in cometary studies suggest rather low mean densities and weak structures for the nuclei. They appear to be accumulations of fairly discrete units loosely bound together, as deduced from the observations of Comet Shoemaker-Levy 9 ...
Whipple, Fred L.
core
Structure and density of cometary nuclei
, 2008 Understanding the nature of the cometary nucleus remains one of the major problems in solar system science. Whipples (1950) icy conglomerate model has been very successful at explaining a range of cometary phenomena, including the source of cometary ...
LOWRY, Stephen C., WEISSMAN, Paul R.
core +2 more sources