Results 41 to 50 of about 8,132,244 (286)

THE PROTOBIOLOGICAL THEORY OF CEILINGS AND FLOORS, OR CHEMICAL EVOLUTION AS A PLANETARY PROCESS [PDF]

Filozofia i Nauka
The article presents a modern protobiological theory based on the classical archetype. It connects the issues of origins of life with the theory of the hierarchy of matter and recognizes that error correction occurs within hierarchical and dynamic living
Alicja Kubica
doaj   +1 more source

A plausible pathway to prebiotic peptides via amino acid amides on the primordial Earth

Earth and Planetary Physics
The prebiotic synthesis of peptides prior to ribosome-catalyzed processes remains an enigma. The synthesis of abiotic peptides from amino acids (AAs) is primarily constrained by high activation energies and unfavorable thermodynamics, necessitating the ...
DingWei Gan, XiangMin Lei, RenWu Zhou, SongSen Fu, Jing Sun, RuSen Zhou, Kostya (Ken) Ostrikov, YuFen Zhao, JianXi Ying   +8 more
doaj   +1 more source

CHEMICAL EVOLUTION IN VeLLOs [PDF]

Journal of The Korean Astronomical Society, 2007
A new type of object called "Very Low Luminosity Objects (VeLLOs)" has been discovered by the Spitzer Space Telescope. VeLLOs might be substellar objects forming by accretion. However, some VeLLOs are associated with strong outflows, indicating the previous existence of massive accretion.
openaire   +2 more sources

Chemical Literature

, 1961
Quarterly supplement for "the regular journals of the American Chemical Society," containing annotated bibliographies of chemical documentation literature as well as information about meetings, conferences, awards, scholarships, and other news from the ...
American Chemical Society. Division of Chemical Literature., Igelsrud, Iver   +1 more
core   +3 more sources

EURAD State-of-the-Art Report: ACED assessment of the chemical evolution at the disposal cell scale—part I—processes at interfaces and evolution at disposal cell scale

Frontiers in Nuclear Engineering
Within the framework of the European Joint Programme on Radioactive Waste Management, the work package ACED–Assessment of chemical evolution of intermediate level (ILW) and high level (HLW) waste at disposal cell scale–used combined experimental and ...
Erika Neeft, Guido Deissmann, Diederik Jacques   +2 more
doaj   +1 more source

Feeding Our Microbiota: Stimulation of the Immune/Semiochemical System and the Potential Amelioration of Non-Communicable Diseases

Life, 2022
Non-communicable diseases are those conditions to which causative infectious agents cannot readily be assigned. It is increasingly likely that at least some of these conditions are due to the breakdown of the previously mutualistic intestinal microbiota ...
David Smith, Sohan Jheeta, Hannya V. Fuentes, Miryam Palacios-Pérez   +3 more
doaj   +1 more source

Chemical Literature

, 1962
Quarterly supplement for "the regular journals of the American Chemical Society," containing annotated bibliographies of chemical documentation literature as well as information about meetings, conferences, awards, scholarships, and other news from the ...
American Chemical Society. Division of Chemical Literature., Valeri, Virginia   +1 more
core   +3 more sources

EURAD State-of-the-Art Report: Assessment of the chemical evolution at the disposal cell scale – part II – gaining insights into the geochemical evolution

Frontiers in Nuclear Engineering
Long time frames are to be considered in the safety and performance assessment of deep geological disposal of intermediate and high level radioactive waste.
Guido Deissmann, Erika Neeft, Diederik Jacques   +2 more
doaj   +1 more source

Origin of the Reductive Tricarboxylic Acid (rTCA) Cycle-Type CO2 Fixation: A Perspective

Life, 2017
The reductive tricarboxylic acid (rTCA) cycle is among the most plausible candidates for the first autotrophic metabolism in the earliest life. Extant enzymes fixing CO2 in this cycle contain cofactors at the catalytic centers, but it is unlikely that ...
Norio Kitadai, Masafumi Kameya, Kosuke Fujishima   +2 more
doaj   +1 more source

Microbiome–Gut Dissociation in the Neonate: Autism-Related Developmental Brain Disease and the Origin of the Placebo Effect

Gastrointestinal Disorders, 2022
While the importance of the intestinal microbiome has been realised for a number of years, the significance of the phrase microbiota–gut–brain axis is only just beginning to be fully appreciated.
David Smith, Sohan Jheeta, Hannya V. Fuentes, Bernadette Street, Miryam Palacios-Pérez   +4 more
doaj   +1 more source