Results 51 to 60 of about 1,838,056 (157)

Energy at Origins: Favorable Thermodynamics of Biosynthetic Reactions in the Last Universal Common Ancestor (LUCA)

Frontiers in Microbiology, 2021
Though all theories for the origin of life require a source of energy to promote primordial chemical reactions, the nature of energy that drove the emergence of metabolism at origins is still debated. We reasoned that evidence for the nature of energy at
Jessica L. E. Wimmer, Joana C. Xavier, Andrey d. N. Vieira, Delfina P. H. Pereira, Jacqueline Leidner, Filipa L. Sousa, Karl Kleinermanns, Martina Preiner, William F. Martin   +8 more
doaj   +1 more source

Disk Growth in Bulge-Dominated Galaxies: Molecular Gas and Morphological Evolution

, 2007
Substantial numbers of morphologically regular early-type (elliptical and lenticular) galaxies contain molecular gas, and the quantities of gas are probably sufficient to explain recent estimates of the current level of star formation activity.
Alison Crocker, Francoise Combes, Lisa Young, Martin Bureau, Wiklind, Wiklind   +5 more
core   +1 more source

The Global Evolution of Giant Molecular Clouds II: The Role of Accretion [PDF]

, 2011
We present virial models for the global evolution of giant molecular clouds. Focusing on the presence of an accretion flow, and accounting for the amount of mass, momentum, and energy supplied by accretion and star formation feedback, we are able to ...
Abdo, Ballesteros-Paredes, Ballesteros-Paredes, Bigiel, Blitz, Bolatto, Christopher D. Matzner, Christopher F. McKee, Dickel, Engargiola, Evans, Fall, Fukui, Glover, Heiles, Heyer, Heyer, Heyer, Hughes, Imara, Kawamura, Kegel, Kennicutt, Kim, Kim, Kim, Krumholz, Krumholz, Krumholz, Krumholz, Krumholz, Krumholz, Lada, Larson, Leroy, Leroy, Li, Li, Li, Li, Lopez, Mark R. Krumholz, Matzner, Matzner, Matzner, McKee, McKee, McKee, Meynet, Mizuno, Murray, Nathan J. Goldbaum, Onodera, Parravano, Roman-Duval, Rosolowsky, Schaerer, Schlegel, Schruba, Schruba, Stark, Stone, Strong, Tamburro, Tan, Tan, Tasker, Tasker, Thilker, Troland, Vazquez-Semadeni, Vázquez-Semadeni, Wang, Wang, Williams, Wise, Wolfire, Wong, Wong, Yang   +79 more
core   +2 more sources

Transcriptional profiles of the fish parasite Neoechinorhynchus agilis (Acanthocephala) emphasize energetic stress in males and high cell-division activity in females

BMC Genomics
Background Thorny-headed worms (Acanthocephala) occur worldwide in gnathostome vertebrates feeding on mandibulate arthropods. They can manipulate host behavior, accumulate heavy metals, and have lately gained economic relevance as a pest in fish ...
Camille-Sophie Cozzarolo, Alexandros Vasilikopoulos, Olivier De Thier, Laura Hagemann, Bahram Sayyaf Dezfuli, Karine van Doninck, Holger Herlyn   +6 more
doaj   +1 more source

Imaging the Breakdown of Molecular-Frame Dynamics through Rotational Uncoupling

, 2017
We demonstrate the breakdown of molecular-frame dynamics induced by the uncoupling of molecular rotation from electronic motion in molecular Rydberg states. We observe this non-Born-Oppenheimer regime in the time domain through photoelectron imaging of a
Bucksbaum, Philip H., Natan, Adi, Zipp, Lucas J.   +2 more
core   +1 more source

Molecular gastronomy : basis for a new culinary movement or modern day alchemy? [PDF]

, 2010
To explore the phenomenon of molecular gastronomy by conducting empirical research focusing on renowned chefs. Design/methodology/approach - Literature review summarising past culinary innovations then focusing on the origins and evolution of molecular ...
Cousins, John, O'Gorman, Kevin D., Stierand, Marc   +2 more
core   +1 more source

Molecular Cloud Evolution III. Accretion vs. stellar feedback

, 2010
We numerically investigate the effect of feedback from the ionizing radiation heating from massive stars on the evolution of giant molecular clouds (GMCs) and their star formation efficiency (SFE).
Alan W. Watson, Ballesteros-Paredes, Brunt, Carpenter, Carroll, Caselli, Ceverino, Diaz-Miller, Dib, Elmegreen, Elmegreen, Enrique Vázquez-Semadeni, Evans, Federrath, Gazol, Gilberto C. Gómez, Hartmann, Hartmann, Heitsch, Heitsch, Hennebelle, Hennebelle, Heyer, Hillenbrand, Hillenbrand, Javier Ballesteros-Paredes, Klessen, Klessen, Klessen, Koyama, Koyama, Kravtsov, Kravtsov, Krumholz, Krumholz, Krumholz, Li, Li, Matzner, Matzner, McKee, Nakamura, Nordlund, Ostriker, Ostriker, Padoan, Padoan, Pedro Colín, Rathborne, Rosas-Guevara, Scalo, Spaans, Spezzi, Tan, Tobin, Truelove, Vázquez-Semadeni, Vázquez-Semadeni, Vázquez-Semadeni, Vázquez-Semadeni, Vázquez-Semadeni, Vázquez-Semadeni, Wada, Wada, Wang, Whitworth, Williams, Yorke   +67 more
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Climate change affects the parasitism rate and impairs the regulation of genes related to oxidative stress and ionoregulation of Colossoma macropomum

Scientific Reports, 2021
Global climate change represents a critical threat to the environment since it influences organismic interactions, such as the host-parasite systems, mainly in ectotherms including fishes.
Jaqueline Custodio da Costa, Samara Silva de Souza, Jonatas da Silva Castro, Renan Diego Amanajás, Adalberto Luis Val   +4 more
doaj   +1 more source

Evolutionary ecology of opsin gene sequence, expression and repertoire. [PDF]

, 2017
Linking molecular evolution to biological function is a long-standing challenge in evolutionary biology. Some of the best examples of this involve opsins, the genes that encode the molecular basis of light reception.
Owens, Gregory L, Rennison, Diana J
core   +1 more source

El origen de la vida y la primera molécula capaz de replicarse a sí misma

Revista de Química, 2014
El origen de la vida en la Tierra es una de las preguntas más difíciles presentadas a la ciencia. En los últimos 60 años, ha habido un progreso considerable en entender cómo moléculas relativamente sencillas, que son relevantes para la vida, pueden ser ...
Roberto Laos, Steven Benner
doaj