Results 41 to 50 of about 612,500 (304)

Shallow extra mixing in solar twins inferred from Be abundances [PDF]

, 2015
Lithium and beryllium are destroyed at different temperatures in stellar interiors. As such, their relative abundances offer excellent probes of the nature and extent of mixing processes within and below the convection zone.
Asplund, M., Castro, M., Maia, M. Tucci, Meléndez, J., Monroe, T. R., Nascimento Jr., J. D. do, Ramírez, I., Yong, D.   +7 more
core   +2 more sources

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

Understanding the various evolutionary stages of the low-mass star-formation process by SO and SO2

Frontiers in Astronomy and Space Sciences
SO and SO2 are two potential candidates to trace the different evolutionary phases of the low-mass star-formation process. Here, we report observations of SO and SO2 along with their isotopologues, 34SO and 34SO2, respectively, in four distinct phases of
Rana Ghosh, Rana Ghosh, Ankan Das, Ankan Das, Prasanta Gorai, Prasanta Gorai, Suman Kumar Mondal, Kenji Furuya, Kenji Furuya, Kei E. I. Tanaka, Takashi Shimonishi   +10 more
doaj   +1 more source

Chemical fingerprints of He-sdO stars

Open Astronomy, 2018
The chemical composition of helium-rich hot subluminous O stars plays an important role to understand and model their formation history. We present a spectroscopic analysis of four He-sdO stars,CD-31° 4800, [CW83] 0904- 02, LSS 1274 and LS IV +10° 9. The
Schindewolf Markus, Németh Peter, Heber Ulrich, Battich Tiara, Bertolami Marcelo M. Miller, Latour Marilyn   +5 more
doaj   +1 more source

Abundances of planetary nebulae in the Galactic bulge [PDF]

, 2015
Context. Planetary nebulae (PNe) abundances are poorly known for those nebulae in the Galactic bulge. This is because of the high and uneven extinction in the bulge which makes visual spectral measurements difficult.
Asplund, Chiappini, Cuisinier, Escudero, Exter, Gorny, Gorny, Gorny, Gutenkunst, Henry, Houck, Hummer, J. Bernard-Salas, Kingsburgh, Lebouteiller, Maciel, Marigo, Martín-Hernández, Mokiem, Perea-Calderon, Pottasch, Pottasch, Pottasch, Rudolph, S. R. Pottasch, Sahai, Sellwood, Shaver, Stanghellini, Surendiranath, Surendiranath, Wang, Webster   +32 more
core   +2 more sources

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

Gas-grain models for interstellar anion chemistry

, 2012
Long-chain hydrocarbon anions CnH- (n=4, 6, 8) have recently been found to be abundant in a variety of interstellar clouds. In order to explain their large abundances in the denser (prestellar/protostellar) environments, new chemical models are ...
Brown, Brown, Brünken, Caselli, Cernicharo, Charnley, Cordiner, Cordiner, Cordiner, Crapsi, Eichelberger, Gupta, Harada, Hasegawa, Hassel, Herbst, Lee, Lee, Leger, M. A. Cordiner, McCarthy, Millar, Peeters, Remijan, Roberts, S. B. Charnley, Sakai, Sakai, Sakai, Thaddeus, Umebayashi, Wakelam, Walsh, Öberg   +33 more
core   +1 more source

Elemental Abundances of Solar Sibling Candidates [PDF]

, 2014
Dynamical information along with survey data on metallicity and in some cases age have been used recently by some authors to search for candidates of stars that were born in the cluster where the Sun formed.
Bajkova, A. T., Bobylev, V. V., Cochran, W. D., Endl, M., Lambert, D. L., MacQueen, P. J., Ramirez, I., Roederer, I. U., Wittenmyer, R. A.   +8 more
core   +3 more sources

An intracellular transporter mitigates the CO2‐induced decline in iron content in Arabidopsis shoots

FEBS Letters, EarlyView.
This study identifies a gene encoding a transmembrane protein, MIC, which contributes to the reduction of shoot Fe content observed in plants under elevated CO2. MIC is a putative Fe transporter localized to the Golgi and endosomal compartments. Its post‐translational regulation in roots may represent a potential target for improving plant nutrition ...
Timothy Mozzanino, Meijie Li, Cécile Fizames, Mattia Adamo, Laurence Lejay, Christian Dubos, Matthieu Platre, Antoine Martin   +7 more
wiley   +1 more source

Slowly Rotating Peculiar Star BD00°1659 as a Benchmark for Stratification Studies in Ap/Bp Stars

Galaxies
We present the results of a self-consistent analysis of the magnetic silicon star BD+00°1659, based on its high-resolution spectra taken from the ESPaDOnS archive (R = 68,000).
Anna Romanovskaya, Tatiana Ryabchikova, Yury Pakhomov, Ilya Potravnov, Tatyana Sitnova   +4 more
doaj   +1 more source