Results 41 to 50 of about 7,622,829 (352)

Chemical evolution of a protoplanetary disk [PDF]

, 2011
In this paper we review recent progress in our understanding of the chemical evolution of protoplanetary disks. Current observational constraints and theoretical modeling on the chemical composition of gas and dust in these systems are presented.
Agúndez, Aikawa, Bergin, Bisschop, Bouvier, Bradley, Brownlee, d'Hendecourt, Dartois, Dmitry A. Semenov, Dutrey, Dutrey, Dutrey, Gail, Gail, Guilloteau, Güdel, Habart, Habing, Hartquist, Hersant, Ilgner, Keller, Lee, Leger, Lin, Markwick, Nomura, Panić, Piétu, Piétu, Semenov, Semenov, Shakura, Thi, Tielens, Tscharnuter, van den Ancker, van der Plas, van Dishoeck, van Zadelhoff, Visser, Visser, Wehrstedt, Williams, Woodall, Öberg   +46 more
core   +1 more source

Linked cycles of oxidative decarboxylation of glyoxylate as protometabolic analogs of the citric acid cycle

Nature Communications, 2018
The citric acid cycle (TCA) is a fundamental metabolic pathway to release stored energy in living organisms. Here, the authors report two linked cycles of reactions that each oxidize glyoxylate into CO2 and generate intermediates shared with the modern ...
Greg Springsteen, Jayasudhan Reddy Yerabolu, Julia Nelson, Chandler Joel Rhea, Ramanarayanan Krishnamurthy   +4 more
doaj   +1 more source

Evolution of the Mass–Metallicity Relation from Redshift z ≈ 8 to the Local Universe

The Astrophysical Journal, 2023
A tight positive correlation between the stellar mass and the gas-phase metallicity of galaxies has been observed at low redshifts. The redshift evolution of this correlation can strongly constrain theories of galaxy evolution.
Danial Langeroodi, Jens Hjorth, Wenlei Chen, Patrick L. Kelly, Hayley Williams, Yu-Heng Lin, Claudia Scarlata, Adi Zitrin, Tom Broadhurst, Jose M. Diego, Xiaosheng Huang, Alexei V. Filippenko, Ryan J. Foley, Saurabh Jha, Anton M. Koekemoer, Masamune Oguri, Ismael Perez-Fournon, Justin Pierel, Frederick Poidevin, Lou Strolger   +19 more
doaj   +1 more source

Towards Bioleaching of a Vanadium Containing Magnetite for Metal Recovery

Frontiers in Microbiology, 2021
Vanadium – a transition metal – is found in the ferrous-ferric mineral, magnetite. Vanadium has many industrial applications, such as in the production of high-strength low-alloy steels, and its increasing global industrial consumption requires new ...
Sören Bellenberg, Stephanie Turner, Laura Seidel, Nathan van Wyk, Ruichi Zhang, Varvara Sachpazidou, Rodrigo F. Embile, Ingar Walder, Tiina Leiviskä, Mark Dopson   +9 more
doaj   +1 more source

Chemical Evolution of the Juvenile Universe [PDF]

, 2009
Only massive stars contribute to the chemical evolution of the juvenile universe corresponding to [Fe/H]
Barklem, Burbidge, Cayrel, François, G. J. Wasserburg, Hill, Käppeler, Qian, Woosley, Y.-Z. Qian   +9 more
core   +2 more sources

Stellar Chemical Evolution [PDF]

Symposium - International Astronomical Union, 1997
One of the major achievements of astrophysics has been the demonstration that most of the chemical elements have been synthesized in stars: nucleosynthesis calculations of homogeneous and inhomogeneous big bang cosmologies show that, in comparison with the most metal-poor stars currently known, essentially no elements heavier than B existed at the era ...
openaire   +2 more sources

A small molecule screen identifies novel inhibitors of mechanosensory nematocyst discharge in Hydra

Scientific Reports, 2021
Cnidarians are characterized by the possession of stinging organelles, called nematocysts, which they use for prey capture and defense. Nematocyst discharge is controlled by a mechanosensory apparatus with analogies to vertebrate hair cells.
Diana Hofmann, Niharika Garg, Simone Grässle, Sylvia Vanderheiden, Bruno Gideon Bergheim, Stefan Bräse, Nicole Jung, Suat Özbek   +7 more
doaj   +1 more source

Molecules to Microbes

Sci, 2020
How did life begin on Earth? And is there life elsewhere in the Cosmos? Challenging questions, indeed. The series of conferences established by NoR CEL in 2013 addresses these very questions.
Sohan Jheeta
doaj   +1 more source

Developmental transcriptomics of the brittle star Amphiura filiformis reveals gene regulatory network rewiring in echinoderm larval skeleton evolution

Genome Biology, 2018
Background Amongst the echinoderms the class Ophiuroidea is of particular interest for its phylogenetic position, ecological importance and developmental and regenerative biology.
David V. Dylus, Anna Czarkwiani, Liisa M. Blowes, Maurice R. Elphick, Paola Oliveri   +4 more
doaj   +1 more source

Review of Original Research, Processing Evolution, Chemical Constituents, and Pharmacological Effects of Semen Vaccariae

World Journal of Traditional Chinese Medicine
To review published literature, summarize information on the chemical composition and pharmacological effects of Semen Vaccariae (SV), and make it available for future researchers to understand the general research status of SV.
Yan-Feng Li, Ya-Shu Liu, Yuan-Liang Ai, Zheng Liu   +3 more
semanticscholar   +1 more source