Results 61 to 70 of about 1,043,960 (288)

In situ detection of boron by ChemCam on Mars [PDF]

, 2017
We report the first in situ detection of boron on Mars. Boron has been detected in Gale crater at levels Curiosity rover ChemCam instrument in calcium-sulfate-filled fractures, which formed in a late-stage groundwater circulating mainly in phyllosilicate-
Anderson, Baldridge, Benton Clark, Blake, Boutlerow, Bridges, Bridges, Clegg, Cloutis, Couch, Cousin, Crowley, Dorothea M. Delapp, Ehlmann, Ethan B. Haldeman, Eugster, Fraeman, Fredrickson, Frydenvang, Furukawa, Garrett, Goldberg, Gooding, Grew, Grotzinger, Grotzinger, Harder, Hesse, Hicks, Hurowitz, Hynek, Ingri, Jens Frydenvang, John C. Bridges, Karahan, Kenneth Herkenhoff, Keren, Keren, Kim, Lahav, Lahav, Lanza, Larralde, Le Mouélic, Lerman, Lodders, Lowenstein, Madeleine R. Bodine, Malin, Mangold, Maurice, Milliken, Morris, Nachon, Nachon, Nina L. Lanza, Orti, Osterloo, Osterloo, Patrick J. Gasda, Perry, Rampe, Rapin, Rhonda McInroy, Ricardo, Roger C. Wiens, Ruiz-Mirazo, Samuel Clegg, Sansonetti, Schubert, Schwenzer, Scorei, Spivack, Stephenson, Susanne P. Schwenzer, Sylvestre Maurice, Tanner, Thomas F. Bristow, Vaniman, Vaniman, Veronica L. Sanford, Wiens, Wiens, William Rapin, Williams, Yen, You   +86 more
core   +6 more sources

Widespread Presence of Glycolaldehyde and Ethylene Glycol Around Sagittarius B2

, 2017
We report the detection of widespread CH$_2$OHCHO and HOCH$_2$CH$_2$OH emission in Galactic center giant molecular cloud Sagittarius B2 using the Shanghai Tianma 65m Radio Telescope.
Chen, Xi, Dong, Jian, Gou, Wei, Li, Di, Li, Juan, Li, Shanghuo, Shen, Zhiqiang, Wang, Bingru, Wang, Jinqing, Wang, Junzhi, Wu, Yajun, Zhao, Rongbing, Zheng, Xingwu   +12 more
core   +1 more source

Prebiotic chemistry and origins of life research with atomistic computer simulations.

Physics of Life Reviews, 2020
Research in origins of life is an intrinsically multi-disciplinary field, aimed at finding answers to the formidably complex problem of understanding the emergence of life from the modern versions of Charles Darwin's celebrated "primordial soup".
Andrea Pérez-Villa, F. Pietrucci, A. M. Saitta   +2 more
semanticscholar   +1 more source

Smart, Bio‐Inspired Polymers and Bio‐Based Molecules Modified by Zwitterionic Motifs to Design Next‐Generation Materials for Medical Applications

Advanced Functional Materials, EarlyView.
Bio‐based and (semi‐)synthetic zwitterion‐modified novel materials and fully synthetic next‐generation alternatives show the importance of material design for different biomedical applications. The zwitterionic character affects the physiochemical behavior of the material and deepens the understanding of chemical interaction mechanisms within the ...
Theresa M. Lutz, Jonas De Breuck, Sahar Salehi, Meike N. Leiske   +3 more
wiley   +1 more source

Open questions in understanding life’s origins

Communications Chemistry, 2021
The chemical space of prebiotic chemistry is extremely large, while extant biochemistry uses only a few thousand interconnected molecules. Here we discuss how the connection between these two regimes can be investigated, and explore major outstanding ...
Christopher J. Butch, Markus Meringer, Jean-Sebastien Gagnon, H. James Cleaves   +3 more
doaj   +1 more source

Chiral Polymerization in Open Systems From Chiral-Selective Reaction Rates

, 2012
We investigate the possibility that prebiotic homochirality can be achieved exclusively through chiral-selective reaction rate parameters without any other explicit mechanism for chiral bias.
A Bakasov, A Salam, Bradley J. Nelson, C Chyba, C McKay, D Fitz, DG Fraser, DK Kondepudi, DP Glavin, F Frank, FHC Crick, J Bailey, JAD Wattis, JAD Wattis, JB Corliss, JD Dunitz, JR Cronin, LD Landau, LE Orgel, M Gleiser, M Gleiser, MA Zuilen van, Marcelo Gleiser, PC Joshi, PCW Davies, PCW Davies, PGH Sandars, R Gomes, R Hazen, R Plasson, SA Benner, Sara Imari Walker, SJ Mojzsis, W Gilbert, WA Bonner, Y Saito, Y Yamagata, Z Martins   +37 more
core   +1 more source

Gut Mycobiota‐Associated Tryptophan Catabolites Protect Against Metabolic Dysfunction‐Associated Steatotic Liver Disease

Advanced Science, EarlyView.
ABSTRACT Accumulating evidence suggests that the intestinal microbiota participates in the progression of metabolic dysfunction‐associated steatotic liver disease (MASLD) through microbiota‐host interaction. However, the beneficial role of commensal mycobiota in MASLD progression remains poorly understood.
Shuping Qiao, Shuangya Fan, Juan Xu, Zhen Xu, Chen Peng, Junxing Qu, Ziqian Bing, Shizhen Zhou, Sunan Shen, Guifang Xu, Yue Zhao, Tingting Wang   +11 more
wiley   +1 more source

Titan Mare Explorer (TiME): first in situ exploration of an extraterrestrial sea [PDF]

, 2010
The lakes and seas of Titan are a sink of products of photolysis in the atmosphere, and a crucial component in Titan's active methane cycle.
Aharonson, O., Bierhaus, E., Clark, B., Griffith, C., Harri, A.-M., Kantsiper, B., Karkoschka, E., Kirk, R., Lorenz, R. D., Lunine, J. I., Mahaffy, P., Newman, C., Ravine, M., Stofan, E. R., Trainer, M., Waite, H, Zarnecki, J.   +16 more
core  

From Cosmos to Intelligent Life: The Four Ages of Astrobiology

, 2012
The history of life on Earth and in other potential life-bearing planetary platforms is deeply linked to the history of the universe. Since life as we know it relies on chemical elements forged in dying heavy stars, the universe needs to be old enough ...
Abel, Arrhenius, Bonner, Fenchel, Fitz, Gleiser, Kaltenegger, Lunine, Marcelo Gleiser, Oparin, Prigogine, Salama, Smoot, Susskind, Susskind, Ward, Webb, Weinberg   +17 more
core   +1 more source

Atmospheric Prebiotic Chemistry and Organic Hazes [PDF]

Current Organic Chemistry, 2013
Earth's atmospheric composition at the time of the origin of life is not known, but it has often been suggested that chemical transformation of reactive species in the atmosphere was a significant source of prebiotic organic molecules. Experimental and theoretical studies over the past half century have shown that atmospheric synthesis can yield ...
openaire   +2 more sources