Results 31 to 40 of about 5,372 (258)
Robust Adaptation and Homeostasis by Autocatalysis [PDF]
The Journal of Physical Chemistry B, 2012 Robust homeostatic mechanisms are essential for the protection and adaptation of organisms in a changing and challenging environment. Integral feedback is a control-engineering concept that leads to robust, i.e., perturbation-independent, adaptation and homeostatic behavior in the controlled variable. Addressing two-component negative feedback loops of
T, Drengstig +4 more
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Anion–π catalysis on carbon allotropes
Beilstein Journal of Organic Chemistry, 2023 Anion–π catalysis, introduced in 2013, stands for the stabilization of anionic transition states on π-acidic aromatic surfaces. Anion–π catalysis on carbon allotropes is particularly attractive because high polarizability promises access to really strong
M. Ángeles Gutiérrez López +7 more
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Indonesian Journal of Chemistry, 2018 This study examined the effect of ingredients mixing sequence to the vulcanization kinetics of natural rubber. The effects of mixing temperature, vulcanization temperature, and the carbon black type upon the kinetics were also studied by using rheography
Abu Hasan +3 more
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Life, 2019 How did chemicals first become organized into systems capable of self-propagation and adaptive evolution? One possibility is that the first evolvers were chemical ecosystems localized on mineral surfaces and composed of sets of molecular species that ...
Lena Vincent +8 more
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Platinum Group Metals: A Review of Resources, Production and Usage with a Focus on Catalysts
Resources, 2021 The major applications of PGMs are as catalysts in automotive industry, petroleum refining, environmental (gas remediation), industrial chemical production (e.g., ammonia production, fine chemicals), electronics, and medical fields.
Anthony E. Hughes +3 more
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Using Patchy Particles to Shed New Light on the Autocatalytic Aggregation of Soft Matter
Proceedings, 2019 Autocatalysis, i.e., the speeding up of a reaction through the very same molecule which is [...]
Silvia Corezzi +2 more
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Stereodynamics of Hemiacetal Formation in Pyridine-3-Carbaldehyde and Pyrimidine-5-Carbaldehyde Derivatives: Implications for the Soai Reaction. [PDF]
ChiralityKinetic studies of the hemiacetal formation of pyridine‐3‐carbaldehyde and pyrimidine‐5‐carbaldehyde derivatives with alcohols by 1H NMR and dynamic HPLC show a high correlation between hemiacetal formation and autocatalytic reactivity in Soai's asymmetric autocatalysis with Gibbs activation energies between 85.9 and 95.5 kJ/mol.
Möhler P, Siegle AF, Trapp O.
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Autocatalysis in a Reconstituted Chloroplast System [PDF]
Plant Physiology, 1974 In whole plants and intact chloroplasts, photosynthesis does not reach its full rate immediately upon illumination but only after a lag which is believed to reflect an autocatalytic increase in the concentration of carbon cycle intermediates. Autocatalysis has now been observed in a reconstituted system containing envelope-free chloroplasts augmented ...
D A, Walker, R M, Lilley
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Autocatalysis in Lithium Diisopropylamide-Mediated Ortholithiations
, 2016 Ortholithiation of 3-fluorophenyl-N,N-diisopropyl carbamate by lithium diisopropylamide (LDA) in THF at −78 °C affords unusual rate behavior including linear decays of the carbamate, delayed formation of LDA−aryllithium mixed dimers, and evidence of ...
David B. Collum (1308378) +2 more
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The occurrence of prime numbers revisited
GECONTEC: Revista Internacional de Gestión del Conocimiento y la Tecnología, 2016 Based on an arithmetical and autocatalytic approach, the authors propose a solution for the occurrence of prime numbers. Exact arithmetical calculations are provided for: the closest prime to any given positive integer (or any number of bigger or smaller
Ernesto Tapia Moore, José Tapia Yañez
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