Results 51 to 60 of about 4,647 (247)
Catalysts, autocatalysis and the origin of metabolism [PDF]
Interface Focus, 2019 If life on Earth started out in geochemical environments like hydrothermal vents, then it started out from gasses like CO 2 , N 2 and H 2 . Anaerobic autotrophs still live from these gasses today, and they still inhabit the Earth's crust.
Martina Preiner +5 more
openaire +4 more sources
Ascorbic acid and copper in linoleate oxidation. II. Ascorbic acid and copper as oxidation catalysts
Journal of Lipid Research, 1969 Both ascorbic acid and copper were strong prooxidants in the oxidation of linoleate in a buffered (pH 7.0) aqueous dispersion at 37°C. Minimum concentrations at which catalytic activity was detected were 1.3 × 10-7m for copper and 1.8 × 10-6m for ...
Gottfried Haase, W.L. Dunkley
doaj +1 more source
Ecological Clues to the Nature of Consciousness
Entropy, 2020 Some dynamics associated with consciousness are shared by other complex macroscopic living systems. For example, autocatalysis, an active agency in ecosystems, imparts to them a centripetality, the ability to attract resources that identifies the system ...
Robert E. Ulanowicz
doaj +1 more source
Electrochemically Triggered Supramolecular Polymerization Under Kinetic Control
Angewandte Chemie, EarlyView.Chemical and electrochemical stimuli enable controlled supramolecular polymerization of perylene diimide–histidine (PDI–His). Redox processes mediate the transformation of kinetically trapped aggregates into thermodynamically stable nanofibers, thereby supporting seeded growth. This approach provides a strategy for regulating self‐assembly pathways and
Eun Gyu Lee +6 more
wiley +2 more sources
Rapid screening of staphylokinase protein variants using an unpurified cell‐free expression system
FEBS Open Bio, EarlyView.An unpurified cell‐free protein synthesis (CFPS) platform enables rapid functional screening of staphylokinase variants. Direct plasminogen‐activation assays performed in microplate format provide real‐time activity readouts, allowing rapid identification and ranking of variants with improved or reduced fibrinolytic activity without protein ...
Maria Tomková +3 more
wiley +1 more source
Prebiotic Reaction Networks in Water
Life, 2020 A prevailing strategy in origins of life studies is to explore how chemistry constrained by hypothetical prebiotic conditions could have led to molecules and system level processes proposed to be important for life’s beginnings. This strategy has yielded
Quoc Phuong Tran +2 more
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Chemically Fueled Systems Chemistry Across Length Scales
Advanced Functional Materials, EarlyView.Chemically fueled reaction cycles regulate processes through single and multiple catalytic sites on the molecular and assembly scale. This gives rise to unique kinetically controlled properties/functions like spatio‐temporal catalysis, oscillations, optical properties, and perform work.
Brigitte A. K. Kriebisch, Job Boekhoven
wiley +1 more source
Dimensions Missing from Ecology
Philosophies, 2018 Ecology, with its emphasis on coupled processes and massive heterogeneity, is not amenable to complete mechanical reduction, which is frustrated for reasons of history, dimensionality, logic, insufficiency, and contingency. Physical laws are not violated,
Robert E. Ulanowicz
doaj +1 more source
Non-Equilibrium Thermodynamics View on Kinetics of Autocatalytic Reactions—Two Illustrative Examples
Molecules, 2021 Autocatalytic reactions are in certain contrast with the linear algebra of reaction stoichiometry, on which rate equations respecting the permanence of atoms are constructed. These mathematical models of chemical reactions are called conservative.
Miloslav Pekař
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Advanced Functional Materials, EarlyView.Ultrasoft silicone elastomers often sacrifice surface functionality for mechanical compliance. In Mold Star, low‐molecular‐weight species form a dispersed phase that weakens the network and passivates the surface. Solvent extraction removes this phase, unexpectedly improving both extensibility and metallization performance, enabling conductive ...
Gloria M. D'Amaral +7 more
wiley +1 more source