Results 71 to 80 of about 5,702,760 (334)

Microbial exopolysaccharide production by polyextremophiles in the adaptation to multiple extremes

FEBS Letters, EarlyView.
Polyextremophiles are microorganisms that endure multiple extreme conditions by various adaptation strategies that also include the production of exopolysaccharides (EPSs). This review provides an integrated perspective on EPS biosynthesis, function, and regulation in these organisms, emphasizing their critical role in survival and highlighting their ...
Tracey M Gloster, Ebru Toksoy Öner
wiley   +1 more source

A working model for cytoplasmic assembly of H/ACA snoRNPs

FEBS Letters, EarlyView.
Dyskerin is the component of nuclear H/ACA ribonucleoproteins (RNPs) endowed with pseudouridine synthase catalytic activity. Two isoforms of human dyskerin have been characterized: the abundant Iso1, mainly nuclear, and the shorter Iso3, mainly cytoplasmic but occasionally imported into nuclei.
Alberto Angrisani, Maria Furia
wiley   +1 more source

The Rate, Amplitude, and Duration of Outbursts from Class 0 Protostars in Orion

The Astrophysical Journal Letters, 2022
At least half of a protostar’s mass is accreted in the Class 0 phase, when the central protostar is deeply embedded in a dense, infalling envelope. We present the first systematic search for outbursts from Class 0 protostars in the Orion clouds.
Wafa Zakri, S. T. Megeath, William J. Fischer, Robert Gutermuth, Elise Furlan, Lee Hartmann, Nicole Karnath, Mayra Osorio, Emily Safron, Thomas Stanke, Amelia M. Stutz, John J. Tobin, Thomas S. Allen, Sam Federman, Nolan Habel, P. Manoj, Mayank Narang, Riwaj Pokhrel, Luisa Rebull, Patrick D. Sheehan, Dan M. Watson   +20 more
doaj   +1 more source

Imeglimin attenuates liver fibrosis by inhibiting vesicular ATP release from hepatic stellate cells

FEBS Letters, EarlyView.
Imeglimin, at clinically relevant concentrations, inhibits vesicular ATP accumulation and release from hepatic stellate cells, thereby attenuating purinergic signaling and reducing fibrogenic activation. This mechanism reveals a newly identified antifibrotic action of imeglimin beyond glycemic control.
Seiji Nomura, Lixiang Wang, Nao Hasuzawa, Ayako Nagayama, Sawako Moriyama, Kenji Ashida, Yoshinori Moriyama, Masatoshi Nomura, Ken Yamamoto   +8 more
wiley   +1 more source

Revealing the structure of land plant photosystem II: the journey from negative‐stain EM to cryo‐EM

FEBS Letters, EarlyView.
Advances in cryo‐EM have revealed the detailed structure of Photosystem II, a key protein complex driving photosynthesis. This review traces the journey from early low‐resolution images to high‐resolution models, highlighting how these discoveries deepen our understanding of light harvesting and energy conversion in plants.
Roman Kouřil
wiley   +1 more source

A new Luminous Variable in M33

, 2009
We present a new luminous star in M33 located in the nuclear region. The star shows strong FeII and [FeII] forest, hydrogen emissions in the spectrum, as well as nebular lines.
A. F. Valeev, Afanasiev, Afanasiev, Barbon, Bonanos, Calzetti, Claret, Corral, Corral, Fabrika, Fabrika, Fabrika, Fabrika, Fabrika, Hubble, Humphreys, Humphreys, Humphreys, Jacoby, Kurtev, Macri, Massey, Massey, Massey, Mochejska, O. Sholukhova, Osterbrock, Reakes, Romano, S. Fabrika, Sholukhova, Sholukhova, Shporer, Smith, Smith, Sterken, Szeifert, Viotti, Viotti, Zharova   +39 more
core   +2 more sources

Smearing model and restoration of star image under conditions of variable angular velocity and long exposure time.

Optics Express, 2014
The star tracker is one of the most promising attitude measurement devices widely used in spacecraft for its high accuracy. High dynamic performance is becoming its major restriction, and requires immediate focus and promotion.
Ting Sun, F. Xing, Z. You, Xiaochun Wang, Bin Li   +4 more
semanticscholar   +1 more source

An improved A-Star based path planning algorithm for autonomous land vehicles

International Journal of Advanced Robotic Systems, 2020
This article presents a novel path planning algorithm for autonomous land vehicles. There are four main contributions: Firstly, an evaluation standard is introduced to measure the performance of different algorithms and to select appropriate parameters ...
Shang Erke, Dai Bin, Yiming Nie, Zhu Qi, X. Liang, Z. Dawei   +5 more
semanticscholar   +1 more source

RAD50 missense variants differentially affect the DNA damage response and mitotic progression

FEBS Letters, EarlyView.
RAD50 incorporates into the MRN complex and initiates the DNA damage response. Furthermore, RAD50 promotes mitotic progression. RAD50 missense variants capable of forming an MRN complex supported the DNA damage response and mitotic features to different extents in complementation experiments, indicating these functions are separable and might impact ...
Hanna Redeker, Swantje Kebel, Lea Völkening, Anna Vatselia, Louisa Weinhold, Girmay Asgedom, Axel Schambach, Detlev Schindler, Thilo Dörk, Kristine Bousset   +9 more
wiley   +1 more source

Variability in Early Post-main-sequence Stars in Globular Cluster NGC 3201

The Astronomical Journal, 2023
In this paper we study stellar variability in the globular cluster NGC 3201 in the magnitude range V = 16–17, corresponding to the subgiant branch and blue stragglers region of the cluster.
D. Ulloa-Solís, C. C. Cortés, S. Villanova, Á. Llancaqueo Albornoz, J. A. Ahumada, C. Parisi   +5 more
doaj   +1 more source