Results 51 to 60 of about 63,862 (294)

Limitations of Stellar Abundance Determinations [PDF]

Symposium - International Astronomical Union, 1991
The information content of (photospheric) stellar spectra and the accuracy of abundance determinations are discussed. Besides the physical properties of the line spectra, the spectral resolution, the signal-to-noise ratio, but also the incompleteness of the knowledge of the contributing blends limit the abundance information.
openaire   +1 more source

Mapping the evolution of mitochondrial complex I through structural variation

FEBS Letters, EarlyView.
Respiratory complex I (CI) is crucial for bioenergetic metabolism in many prokaryotes and eukaryotes. It is composed of a conserved set of core subunits and additional accessory subunits that vary depending on the organism. Here, we categorize CI subunits from available structures to map the evolution of CI across eukaryotes. Respiratory complex I (CI)
Dong‐Woo Shin, Tingting Chen, James A. Letts   +2 more
wiley   +1 more source

Spatiotemporal and quantitative analyses of phosphoinositides – fluorescent probe—and mass spectrometry‐based approaches

FEBS Letters, EarlyView.
Fluorescent probes allow dynamic visualization of phosphoinositides in living cells (left), whereas mass spectrometry provides high‐sensitivity, isomer‐resolved quantitation (right). Their synergistic use captures complementary aspects of lipid signaling. This review illustrates how these approaches reveal the spatiotemporal regulation and quantitative
Hiroaki Kajiho, Shin Morioka, Junko Sasaki, Takehiko Sasaki   +3 more
wiley   +1 more source

Barium Abundances of Common Stars in the Gaia-ESO Survey and the LAMOST Medium-resolution Survey

The Astrophysical Journal
Barium (Ba) abundance has been used as a crucial tracer of both slow and rapid neutron-capture processes to constrain the evolutionary models of the Galaxy.
Tian-Yi Chen, Jian-Rong Shi, Hong-Liang Yan, Shuai Liu, Chun-Qian Li, Xiao-Jin Xie, Ze-Ming Zhou, Yao-Jia Tang, Ming-Yi Ding   +8 more
doaj   +1 more source

The GAPS Programme with HARPS-N at TNG. X. Differential abundances in the XO-2 planet hosting binary [PDF]

, 2015
Binary stars hosting exoplanets are a unique laboratory where chemical tagging can be performed to measure with high accuracy the elemental abundances of both stellar components, with the aim to investigate the formation of planets and their subsequent ...
Affer, L., Biazzo, K., Boccato, C., Bonomo, A. S., Borsa, F., Claudi, R., Cosentino, R., Covino, E., Damasso, M., Desidera, S., Gandolfi, D., Gratton, R., Knapic, C., Lanza, A. F., Lucatello, S., Maldonado, J., Marzari, F., Micela, G., Molaro, P., Pagano, I., Pedani, M., Pillitteri, I., Piotto, G., Poretti, E., Rainer, M., Sanchez, R. Zanmar, Santos, N. C., Scandariato, G., Sozzetti, A.   +28 more
core   +2 more sources

Stellar abundances from line statistics

The Astrophysical Journal, 1980
The method of linear statistical modeling has been combined with a rudimentary model of stellar photospheres to obtain abundance estimates for a large member of ''normal'' and peculiar, upper main sequence stars. The adopted standard abundances, obtained from published fine analyses, can be fitted by our algorithms with about 0.5 dex as the standard ...
Cowley, C. R., Aikman, G. C. L.
openaire   +2 more sources

Protein pyrophosphorylation by inositol pyrophosphates — detection, function, and regulation

FEBS Letters, EarlyView.
Protein pyrophosphorylation is an unusual signaling mechanism that was discovered two decades ago. It can be driven by inositol pyrophosphate messengers and influences various cellular processes. Herein, we summarize the research progress and challenges of this field, covering pathways found to be regulated by this posttranslational modification as ...
Sarah Lampe, Tanmay Kumar Mohanty, Rashna Bhandari, Dorothea Fiedler   +3 more
wiley   +1 more source

Stellar Nucleosynthesis in the Hyades Open Cluster [PDF]

, 2009
We report a comprehensive light element (Li, C, N, O, Na, Mg, and Al) abundance analysis of three solar-type main sequence (MS) dwarfs and three red giant branch (RGB) clump stars in the Hyades open cluster using high-resolution and high signal-to-noise ...
Allende Prieto, Armstrong, Arnett, Asplund, Böhm-Vitense, Carlsson, Clayton, Denissenkov, Duncan, El Eid, El Eid, Ferguson, Fitzpatrick, Gratton, Gratton, Gustafsson, Hamdani, Jacobson, Jacobson, Jeremy R. King, Kjaergaard, Kunz, Kupka, Lambert, Lih-Sin The, Luck, Mandell, Paulson, Piskunov, Rolfs, Ryabchikova, Schuler, Schuler, Schuler, Shetrone, Simon C. Schuler, Smith, Stürenburg, Takeda, Takeda, Takeda, Tautvaišiene, Taylor, The, The, Timmes, Varenne, Yi, Yong   +48 more
core   +3 more sources

An upstream open reading frame regulates expression of the mitochondrial protein Slm35 and mitophagy flux

FEBS Letters, EarlyView.
This study reveals how the mitochondrial protein Slm35 is regulated in Saccharomyces cerevisiae. The authors identify stress‐responsive DNA elements and two upstream open reading frames (uORFs) in the 5′ untranslated region of SLM35. One uORF restricts translation, and its mutation increases Slm35 protein levels and mitophagy.
Hernán Romo‐Casanueva, Ariann E. Mendoza‐Martínez, P. Abril Medina‐Flores, Carlos Campero‐Basaldua, Alexander DeLuna, Soledad Funes   +5 more
wiley   +1 more source

Determining Stellar Elemental Abundances from DESI Spectra with the Data-driven Payne

The Astrophysical Journal Supplement Series
Stellar abundances for a large number of stars provide key information for the study of Galactic formation history. Large spectroscopic surveys such as the Dark Energy Spectroscopic Instrument (DESI) and LAMOST take median-to-low-resolution ( R ≲ 5000 ...
Meng Zhang, Maosheng Xiang, Yuan-Sen Ting, Jiahui Wang, Haining Li, Hu Zou, Jundan Nie, Lanya Mou, Tianmin Wu, Yaqian Wu, Jifeng Liu   +10 more
doaj   +1 more source