Results 121 to 130 of about 7,604,095 (315)

Galactic and Cosmic Chemical Evolution with Hypernovae

, 2005
We provide new nucleosynthesis yields depending on metallicity and energy (i.e., (normal supernovae and hypernovae), and show the evolution of heavy element abundances from C to Zn in the solar neighborhood.
Kobayashi, Chiaki
core   +1 more source

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 Novel Non-Alcoholic Einkorn-Based Beverage Produced by Lactic Acid Fermentation: Microbiological, Chemical, and Sensory Assessment

Foods
Einkorn (Triticum monococcum L. ssp. monococcum) is gaining renewed interest for its high nutritional value and digestibility. Lactic acid fermentation could enhance these properties by improving micronutrient bioavailability, sensory properties, and ...
Antonietta Maoloni, Martina Cirlini, Lorenzo Del Vecchio, Raquel Torrijos, Eleonora Carini, Giorgia Rampanti, Federica Cardinali, Vesna Milanović, Cristiana Garofalo, Andrea Osimani, Lucia Aquilanti   +10 more
doaj   +1 more source

Chemical evolution in the early phases of massive star formation - II. Deuteration [PDF]

, 2015
The chemical evolution in high-mass star-forming regions is still poorly constrained. Studying the evolution of deuterated molecules allows to differentiate between subsequent stages of high-mass star formation regions due to the strong temperature ...
T. Gerner, Y. Shirley, H. Beuther, D. Semenov, H. Linz, T. Albertsson, T. Henning   +6 more
semanticscholar   +1 more source

On the origin of fluorine in the Milky Way

, 2004
The main astrophysical factories of fluorine (19F) are thought to be Type II supernovae, Wolf-Rayet stars, and the asymptotic giant branch (AGB) of intermediate mass stars.
Agostino Renda, Alessandro Chieffi, Alibés, Allende Prieto, Amanda I. Karakas, Bekki, Bertelli, Brad K. Gibson, Cappellaro, Cunha, Dray, Fenner, Forestini, Frost, Frost, Gibson, Holweger, Iglesias, Iwamoto, John C. Lattanzio, Jorissen, Karakas, Karakas, Katia Cunha, Kroupa, Limongi, Lugaro, Meynet, Mowlavi, Myra, Rana, Renzini, Russell, Schaller, Simon Campbell, Smith, Timmes, Vassiliadis, Verne V. Smith, Woosley, Woosley, Woosley, Woosley, Yeshe Fenner   +43 more
core   +2 more sources

The nicotinamide hypothesis revisited—plant defense signaling integrating PARP, nicotinamide, nicotinic acid, epigenetics, and glutathione

FEBS Letters, EarlyView.
Nicotinamide (NIC) and nicotinic acid (NIA) are proposed as stress signaling compounds in plants. Oxidative stress may lead to single strand breaks (SSB) in DNA, which activate poly(ADP‐ribose) polymerase (PARP). NIC and NIA are then formed from NAD. NIC and NIA can promote epigenetic changes leading to the expression of defense genes specific for the ...
Torkel Berglund, Anna B. Ohlsson
wiley   +1 more source

The role of neutron star mergers in the chemical evolution of the Galactic halo [PDF]

, 2015
Aims. We explore the problem of the site of production of Eu. We use also the information present in the observed spread in the Eu abundances in the early Galaxy, not only its average trend.
G. Cescutti, D. Romano, F. Matteucci, F. Matteucci, C. Chiappini, R. Hirschi, R. Hirschi   +6 more
semanticscholar   +1 more source

Chemical Evolution in the Carina Dwarf Spheroidal

, 2004
We present metallicities for 487 red giants in the Carina dwarf spheroidal (dSph) galaxy that were obtained from FLAMES low-resolution Ca triplet (CaT) spectroscopy. We find a mean [Fe/H] of -1.91 dex with an intrinsic dispersion of 0.25 dex, whereas the
Evans, N. W., Gilmore, G. F., Grebel, E. K., Harbeck, D., Kleyna, J. T., Koch, A., Wilkinson, M. I., Wyse, R. F. G.   +7 more
core   +1 more source

Single cis‐elements in brassinosteroid‐induced upregulated genes are insufficient to recruit both redox states of the BIL1/BZR1 DNA‐binding domain

FEBS Letters, EarlyView.
Phytohormone brassinosteroid‐induced gene regulation by the transcription factor BIL1/BZR1 involves redox‐dependent DNA‐binding alternation and interaction with the transcription factor PIF4. The reduced BIL1/BZR1 dimer binds preferred cis‐elements, while oxidation alters its oligomerization state and disrupts DNA‐binding ability.
Shohei Nosaki, Masae Ohtsuka, Takeshi Nakano, Masaru Tanokura, Takuya Miyakawa   +4 more
wiley   +1 more source

Structural dynamics of the plant hormone receptor ETR1 in a native‐like membrane environment

FEBS Letters, EarlyView.
The present study unveils the structural and signaling dynamics of ETR1, a key plant ethylene receptor. Using an optimized nanodisc system and solution NMR, we captured full‐length ETR1 in a native‐like membrane environment. Our findings reveal dynamic domain uncoupling and Cu(I)‐induced rigidification, providing the first evidence of metal‐triggered ...
Moritz Lemke, Nils Alexander Lakomek, Georg Groth   +2 more
wiley   +1 more source