Results 31 to 40 of about 267,753 (326)

Detection of a Super Star Cluster as the Ionizing Source in the Low Luminosity AGN NGC 4303 [PDF]

, 2002
HST UV STIS imaging and spectroscopy of the low luminosity AGN (LLAGN) NGC 4303 have identified the previously detected UV-bright nucleus of this galaxy, as a compact, massive and luminous stellar cluster. The cluster with a size (FWHM) of 3.1 pc, and an
Claus Leitherer, Elena Jimenez Bailon, J. Miguel Mas‐Hesse, Luis Colina, Rosa Gonzalez Delgado   +4 more
core   +2 more sources

Real‐time assay of ribonucleotide reductase activity with a fluorescent RNA aptamer

FEBS Letters, EarlyView.
Ribonucleotide reductases (RNR) synthesize DNA building blocks de novo, making them crucial in DNA replication and drug targeting. FLARE introduces the first single‐tube real‐time coupled RNR assay, which enables isothermal tracking of RNR activity at nanomolar enzyme levels and allows the reconstruction of allosteric regulatory patterns and rapid ...
Jacopo De Capitani, Noemi E. Nwosu, Viktoria Gocke, Müge Kasanmascheff, Hannes Mutschler   +4 more
wiley   +1 more source

Ultraviolet Spectroscopy of Circumnuclear Star Clusters in M83

, 2010
We analyze archival HST/STIS/FUV-MAMA imaging and spectroscopy of 13 compact star clusters within the circumnuclear starburst region of M83, the closest such example.
Adelberger, Aida Wofford, Bonatto, Bosch, Bresolin, Brown, Buta, Calzetti, Calzetti, Chandar, Chandar, Chandar, Chandar, Chen, Claus Leitherer, Comerón, Conti, de Mello, de Vaucouleurs, Dopita, Díaz, Díaz, Elmegreen, Elmegreen, Feldmeier, Hao, Harris, Heckman, Hillier, Hunt, Jogee, Knapen, Leitherer, Leitherer, Leitherer, Maeder, Maoz, Meurer, Meynet, Miller, Miskey, Pauldrach, Pellerin, Pellerin, Pettini, Puls, Puxley, Regan, Rix, Rodrigues, Rupali Chandar, Sakamoto, Schaller, Schlegel, Schmidt-Kaler, Thatte, Thim, Tody, Tody, Tremonti, van de Ven, Vázquez, Vázquez, Wiklind   +63 more
core   +1 more source

Sequence determinants of RNA G‐quadruplex unfolding by Arg‐rich regions

FEBS Letters, EarlyView.
We show that Arg‐rich peptides selectively unfold RNA G‐quadruplexes, but not RNA stem‐loops or DNA/RNA duplexes. This length‐dependent activity is inhibited by acidic residues and is conserved among SR and SR‐related proteins (SRSF1, SRSF3, SRSF9, U1‐70K, and U2AF1).
Naiduwadura Ivon Upekala De Silva, Puspa Kunwar, Md Ibnul Rifat Rahman, Joanna Koryo Kwao, Nathan Lehman, Zihan Zhang, Trenton Paul, Claire Cheng, Nicholas Truex, Hui‐Ting Lee, Jun Zhang   +10 more
wiley   +1 more source

Preparation and Photocatalytic Properties of N-Doped Graphene/TiO2 Composites

Journal of Chemistry, 2020
N-doped graphene (NG)/TiO2 composites were prepared by a two-step hydrothermal method using HF as the surface etchant and urea as the nitrogen source. The morphology, structure, and bonding conditions of the NG/TiO2 composites were characterized by X-ray
Jing Liu, Kun-Yu Chen, Jie Wang, Min Du, Zheng-Yang Gao, Chun-Xiao Song   +5 more
doaj   +1 more source

Structural instability impairs function of the UDP‐xylose synthase 1 Ile181Asn variant associated with short‐stature genetic syndrome in humans

FEBS Letters, EarlyView.
The Ile181Asn variant of human UDP‐xylose synthase (hUXS1), associated with a short‐stature genetic syndrome, has previously been reported as inactive. Our findings demonstrate that Ile181Asn‐hUXS1 retains catalytic activity similar to the wild‐type but exhibits reduced stability, a looser oligomeric state, and an increased tendency to precipitate ...
Tuo Li, Pedro A. Sánchez‐Murcia, Bernd Nidetzky   +2 more
wiley   +1 more source

HST/FOS Eclipse mapping of IP Pegasi in outburst

, 2004
We report the results of a time-resolved eclipse mapping of the dwarf nova IP Pegasi during the decline of its May 1993 outburst from HST/FOS fast spectroscopy covering 3 eclipses in the ultraviolet spectral range.Comment: 1 page 0 ...
Baptista, R., Horne, K., Saito, R. K.
core   +2 more sources

Ultrafast Molecular Spectroscopy Using a Hollow-Core Photonic Crystal Fibre Light Source [PDF]

, 2018
We demonstrate, for the first time, the application of rare-gas filled hollow-core photonic crystal fibres (HC-PCFs) as tuneable ultraviolet light sources in femtosecond pump-probe spectroscopy.
Belli, Federico, Gao, Shou-fei, Kotsina, Nikoleta, Townsend, Dave, Travers, John C., Wang, Pu, Wang, Ying-ying   +6 more
core   +2 more sources

Structural biology of ferritin nanocages

FEBS Letters, EarlyView.
Ferritin is a conserved iron‐storage protein that sequesters iron as a ferric mineral core within a nanocage, protecting cells from oxidative damage and maintaining iron homeostasis. This review discusses ferritin biology, structure, and function, and highlights recent cryo‐EM studies revealing mechanisms of ferritinophagy, cellular iron uptake, and ...
Eloise Mastrangelo, Flavio Di Pisa
wiley   +1 more source

The LOUVRE Laboratory: State-of-the-Art Ultrafast Ultraviolet Spectroscopies for Molecular and Materials Science

CHIMIA, 2017
We describe the facilities for ultraviolet studies in the femtosecond to nanosecond time domain. These facilities consist of: i) a set-up for deep-ultraviolet spectroscopy in the 260–380 nm range in both pump and probe pulses for transient ...
Malte Oppermann, Frank van Mourik, Thomas Rossi, Tania Palmieri, Benjamin Bauer, Lars Mewes, Edoardo Baldini, Aurelio Oriana, Natalia S. Nagornova, Majed Chergui   +9 more
doaj   +1 more source