Results 31 to 40 of about 18,407 (265)

Liver organoids: modelling complexity in homeostasis and disease

FEBS Letters, EarlyView.
Studying liver in vitro has been challenging because simple 2D cell cultures fail to capture liver's cellular and architectural complexity. To bridge this gap, scientists increasingly use organoids, 3D liver models which better mimic liver composition and function. This review examines recent advances in liver organoid complexity and realism, discusses
Anna M. Dowbaj, Meritxell Huch
wiley   +1 more source

The Carbon-dependent Binary Frequency of CEMP-no Stars

The Astrophysical Journal
Studies of the oldest and most metal-poor stars in the Milky Way confirm a common chemical signature of high carbon abundances and subsolar neutron-capture enrichment.
John D. Dixon, Terese T. Hansen, Jennifer Marshall, Vinicius M. Placco, Timothy C. Beers, Anke Ardern-Arentsen, Birgitta Nordström, Lauren N. Aldoroty, Jared Cathey, Peter S. Ferguson, Katherine Kristofek, Karin Lind, Hudson Malone, Ferner Moreno, Jessica Myron, Alexander H. Riley, Else Starkenburg, Kaitlin B. Webber   +17 more
doaj   +1 more source

Partial depletion of plasminogen activator inhibitor‐1 decreases subcutaneous fat cell hypertrophy and liver cholesterol in high‐fat‐fed female mice

FEBS Letters, EarlyView.
Obesity raises blood levels of PAI‐1, a protein linked to metabolic dysfunction‐associated steatotic liver disease in people with obesity. In female mice fed a high‐fat diet, partially lowering PAI‐1 led to smaller subcutaneous fat cells and lower liver cholesterol, without changing body weight or insulin sensitivity.
Claudia E. Ramirez Bustamante, Robert Sharp, Pradip K. Saha, Elizabeth S. Anaya, Elizabeth L. Lieu, Evelyn L. de Groot, Pooja Patel, Mi Jeong Heo, Aaron R. Cox, Kang Ho Kim, Sean M. Hartig   +10 more
wiley   +1 more source

Identifying Carbon Star Candidates from LAMOST DR11 and SDSS DR18 Based on a Parallel Feature Recognition Method

The Astrophysical Journal Supplement Series
Carbon stars are critical for understanding stellar evolution and exploring cosmic chemistry. This paper provides 7809 carbon star candidates identified from the Large-Area Multi-Object Fiber Optic Spectroscopic Telescope (LAMOST) DR11 and Sloan Digital ...
Lichan Zhou, Jianghui Cai, Haifeng Yang, Ali Luo, Yinbi Li, Chenhui Shi, Boyu Zhang, Jianing Tian, Yinan Yuan, Yuqing Yang   +9 more
doaj   +1 more source

The Evolution of Carbon Stars [PDF]

Publications of the Astronomical Society of the Pacific, 1993
This dissertation is concerned with the nature of the carbon stars, unusual late-type stars in which the abundance of carbon in the photosphere is greater than that of oxygen. Data from the Infrared Astronomical Satellite (IRAS) survey has shown that carbon stars which were identified from optical surveys and those identified from the SiC dust features
openaire   +1 more source

The Frequency of Carbon Stars among Extremely Metal-poor Stars [PDF]

The Astrophysical Journal, 2005
We demonstrate that there are systematic scale errors in the [Fe/H] values determined by the Hamburg/ESO Survey (and by inference by the HK Survey in the past) for certain extremely metal poor highly C-enhanced giants. The consequences of these scale errors are that a) the fraction of carbon stars at extremely low metallicities has been overestimated ...
Cohen, Judith G., Shectman, Stephen, Thompson, Ian, McWilliam, Andrew, Christlieb, Norbert, Meléndez, Jorge, Zickgraf, Franz-Josef, Ramírez, Solange, Swenson, Amber   +8 more
openaire   +3 more sources

Functional comparison of EncB and EncC cargo proteins in iron storage within the Myxococcus xanthus encapsulin

FEBS Letters, EarlyView.
Encapsulins are protein nanocompartments that play an important role in iron storage. In the Myxococcus xanthus encapsulin system, two cargo proteins called EncB and EncC contribute to iron mineralization. Here, we show that EncB and EncC generate iron‐containing minerals with distinct chemical compositions, suggesting that the composition of stored ...
Harry B. McDowell, Thomas Walther, Egbert Hoiczyk   +2 more
wiley   +1 more source

Discovery of the First Five Carbon-enhanced Metal-poor Stars in the LMC

The Astrophysical Journal Letters
A substantial fraction of metal-poor stars in the local Milky Way halo exhibit large overabundances of carbon. These stars, dubbed carbon-enhanced metal-poor (CEMP) stars, provide crucial constraints on the nature of the early Universe, including the ...
Madeline Lucey, Vedant Chandra, Alexander P. Ji, Andrew R. Casey, David Nidever, Sean Morrison, Robyn E. Sanderson, Slater Oden, José G. Fernández-Trincado, Guilherme Limberg   +9 more
doaj   +1 more source

L‐aspartate oxidase provides new insights into fumarate reduction in anaerobic darkness in Synechocystis sp. PCC6803

FEBS Letters, EarlyView.
Synechocystis strains deficient in succinate dehydrogenase (SDH) secrete more succinate than the WT under dark anaerobic conditions, supporting that SDH then primarily acts as SDH, not as a fumarate reductase. L‐aspartate oxidase (Laspo) from Synechocystis is functional under anaerobic conditions, reducing fumarate to succinate.
Kateryna Kukil, Jeffrey A. Hawkes, Cecilia Blikstad, Pia Lindberg   +3 more
wiley   +1 more source

Carbon Star Identification in LAMOST DR12 Based on a Multiscale Global and Local Spectral Feature Fusion Model

The Astrophysical Journal Supplement Series
Carbon stars are important kinematic tracers for investigating the structure and evolutionary history of the Milky Way. Therefore, the efficient identification of carbon stars from large-scale spectroscopic surveys is of great scientific importance.
Jianhua Xie, Zhong Cao
doaj   +1 more source