Results 141 to 150 of about 7,581,489 (212)
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Chemical Evolution of Galaxies
Annual Review of Astronomy and Astrophysics, 1976The various nucleosynthetic processes needed to account for the formation of the different nuclear species have been described in the previous chapters as well as the location of these nucleosynthetic events. At the beginning of this monograph, the evolution of the matter which constitutes the celestial bodies such as planets, stars and galaxies was ...
Audouze, J., Tinsley, B.M.
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Chemical evolution of photosynthesis
Origins of Life, 1976The principles of biological evolution of photosynthesis are established, but the ways of chemical evolution are unclear yet. The model systems will help to elucidate the problem. Every type of photosynthesis requires photoreceptor absorbing solar radiation. We studied as photoreceptors inorganic components of Earth crust, some coenzymes and porphyrins
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Chemical evolution and the evolution of the Earth's crust
Origins of Life, 1977It is hypothesized that there is a close relationship between the geologic evolution of the global plates of the Earth's crust and the chemical evolution of life on the Earth. Characteristics of the axes of plate spreading are discussed in relation to postulated environments conductive to the synthesis of chemical compounds thought to be important ...
D E, Ingmanson, M J, Dowler
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Chemical Evolution of the Galaxy
Annual Review of Astronomy and Astrophysics, 1991Since the discovery of the cosmic microwave background ( 1 84), it is gen erally assumed that the universe originated from a hot big bang (78). Detailed nucleosynthesis calculations based on the hot big bang model (e.g. 4, 1 82, 221 ) showed that no element heavier than 9Be could have been synthesized primordially with an abundance exceeding 101 4 by ...
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Rare travertine systems in Jordan evolution, chemical and biogenic composition
Quarterly journal of engineering geology and hydrogeologyThis study examines two rare travertine systems in Jordan, shedding light on distinctive hydrogeochemical and environmental processes. Uniquely, the Maqarin travertines form through absorption of atmospheric CO₂, interacting with oil shale and leading to
Elias Salameh, Ikhlas Alhejoj
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Directed Evolution: Methodologies and Applications.
Chemical Reviews, 2021Directed evolution aims to expedite the natural evolution process of biological molecules and systems in a test tube through iterative rounds of gene diversifications and library screening/selection.
Yajie Wang +5 more
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Chemical Evolution of Enzyme-Catalyzed Glycosylation.
Accounts of Chemical ResearchConspectusThe limited availability of structurally well-defined diverse glycans remains a major obstacle for deciphering biological functions as well as biomedical applications of carbohydrates.
Chang-Cheng Liu +2 more
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ACS Energy Letters, 2019
The question of whether the metal chalcogenides (phosphides) that have been acknowledged to be efficient materials for bifunctional electrocatalysts really perform as the active species or just “pre-catalysts” has been debated.
Yanping Zhu +7 more
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The question of whether the metal chalcogenides (phosphides) that have been acknowledged to be efficient materials for bifunctional electrocatalysts really perform as the active species or just “pre-catalysts” has been debated.
Yanping Zhu +7 more
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Fuel, 2019
Insights into evolution pathways of chemical structures during HTC are essential in acquiring the mechanisms controlling the structure-reactivity of biowaste-derived hydrochars.
X. Zhuang +6 more
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Insights into evolution pathways of chemical structures during HTC are essential in acquiring the mechanisms controlling the structure-reactivity of biowaste-derived hydrochars.
X. Zhuang +6 more
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The role of phosphorus in chemical evolution
Chemical Society Reviews, 2005AbstractFor Abstract see ChemInform Abstract in Full Text.
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