Results 81 to 90 of about 236,736 (305)
The TRGB-SBF Project. IV. A Color Calibration of the TRGB in the JWST F090W+F150W Filters
The Astrophysical JournalObservations with JWST in the F090W band provide a powerful tool for determining galaxy distances based on tip of the red giant branch (TRGB) measurements. It is a great convenience that the TRGB lies at an almost constant absolute magnitude level at low
Maksim I. Chazov +9 more
doaj +1 more source
Distance Indicators in the Magellanic Clouds [PDF]
Highlights of Astronomy, 1983 In talking about the overall distance scale of the Universe and the Hubble Constant, the Magellanic Clouds are good places to start. They are stellar systems large enough to contain stars, clusters and nebulae of all types, covering a wide age range. With modern telescopes and detectors, we are able to observe stars from the very bright down to those ...
openaire +1 more source
Structural insights into an engineered feruloyl esterase with improved MHET degrading properties
FEBS Letters, EarlyView.A feruloyl esterase was engineered to mimic key features of MHETase, enhancing the degradation of PET oligomers. Structural and computational analysis reveal how a point mutation stabilizes the active site and reshapes the binding cleft, expading substrate scope.
Panagiota Karampa +5 more
wiley +1 more source
QUALITY INDICATORS AND INTERMEDIATE PRODUCTS: A NON-PARAMETRIC APPROACH [PDF]
In this paper we propose a methodology to measure the characteristics and composition of intermediate products using productivity indicators based on directional distance functions.
Zago, Angelo M.
core +1 more source
Greater Access to Higher Education through Communication Technologies in Sub-Saharan Africa: E-Learning Readiness of Distance Education Students in Nigeria [PDF]
, 2012 This concurrent mixed methods study sought to determine e-learning readiness by distance education students in Nigeria based on their level of communication technology usage and perceptions of distance education delivery methods, and comparing learning ...
Fakinlede, Charity Onovughakpo
core
The Astrophysical JournalThe TRGB−SBF Project team is developing an independent distance ladder using a geometrical calibration of the tip of the red giant branch (TRGB) method in elliptical galaxies that can, in turn, be used to set the surface brightness fluctuation (SBF ...
Joseph B. Jensen +7 more
doaj +1 more source
FEBS Letters, EarlyView.Ascidian Ciona larvae initially show strong clockwise tail twisting, which is largely corrected during development. However, a small residual twist remains. This study shows that organized helical myofibrils in tail muscles mechanically stabilize this residual asymmetry, preventing complete restoration of bilateral symmetry and revealing how embryos ...
Yuki S. Kogure +3 more
wiley +1 more source
Using RR Lyrae Stars as High-Precision Distance Indicators in the Infrared [PDF]
, 2018 RR Lyrae stars have the potential to be high-precision distance indicators, and serve as the anchor for a distance ladder composed of Population II stars. Theoretical pulsation models predict a significant contribution of metallicity on the zero point of
Neeley, JR +6 more
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Gamma-Ray Bursts as Distance Indicators by a Statistical Learning Approach
The Astrophysical Journal LettersGamma-ray bursts (GRBs) can be probes of the early Universe, but currently, only 26% of GRBs observed by the Neil Gehrels Swift Observatory have known redshifts ( z ) due to observational limitations.
Maria Giovanna Dainotti +8 more
doaj +1 more source
FEBS Letters, EarlyView.Septin 9 polybasic domains couple phosphoinositide‐rich membrane binding to centrosome positioning, Golgi organization, and microtubule acetylation to control epithelial polarity. Their loss disrupts this axis, causing centrosome mispositioning, Golgi fragmentation, reduced microtubule acetylation, and polarity inversion via upregulation of the ...
Ting ting Cai +4 more
wiley +1 more source