Results 41 to 50 of about 174,381,677 (307)

Homochirality: a prerequisite or consequence of life?

open access: yes, 2020
Many of the building blocks of life such as amino acids and nucleotides are chiral, i.e., different from their mirror image. Contemporary life selects and synthesizes only one of two possible handednesses.
Brandenburg, Axel,   +2 more
core   +1 more source

Formamide and the origin of life [PDF]

open access: yesPhysics of Life Reviews, 2012
The complexity of life boils down to the definition: "self-sustained chemical system capable of undergoing Darwinian evolution" (Joyce, 1994) [1]. The term "self-sustained" implies a set of chemical reactions capable of harnessing energy from the environment, using it to carry out programmed anabolic and catabolic functions.
Raffaele Saladino   +4 more
openaire   +8 more sources

Self-Similar Patterns from Abiotic Decarboxylation Metabolism through Chemically Oscillating Reactions: A Prebiotic Model for the Origin of Life [PDF]

open access: yes, 2023
The origin of life must have included an abiotic stage of carbon redox reactions that involved electron transport chains and the production of lifelike patterns.
Kevin Devine   +7 more
core   +1 more source

RNP-world: The ultimate essence of life is a ribonucleoprotein process

open access: yesGenetics and Molecular Biology, 2022
The fundamental essence of life is based on process of interaction between nucleic acids and proteins. In a prebiotic world, amino acids, peptides, ions, and other metabolites acted in protobiotic routes at the same time on which RNAs performed catalysis
Sávio Torres de Farias   +1 more
doaj   +1 more source

Metagenomic Analysis of Soil Bacterial Community and Level of Genes Responsible for Biodegradation of Aromatic Hydrocarbons [PDF]

open access: yesPolish Journal of Microbiology, 2017
The aim of the studies was to compare the composition of soil bacterial metabiomes originating from urbanized areas and areas con­taminated with hydrocarbons with those from agricultural soil and forest soil obtained from a protected wild-life park ...
Jakub Czarny   +5 more
doaj   +1 more source

Microbiological quality of farmed grass carp, bighead carp, Siberian sturgeon, and wels catfish from Eastern Poland

open access: yesJournal of Veterinary Research, 2018
The purpose of this study was to determine the microbiological quality of food fish and its safety for consumers.
Pyz-Łukasik Renata   +1 more
doaj   +1 more source

Hygiene Quality and Consumer Safety of Traditional Short- and Long-Ripened Cheeses from Poland

open access: yesJournal of Food Quality, 2018
The aim of this study was the assessment of the microbiological quality of three types of traditional cheeses which are produced from raw and pasteurized cow’s milk. Two types of cheeses were of the short-ripened type, and one cheese was long-ripened.
Renata Pyz-Łukasik   +2 more
doaj   +1 more source

Distinguishing Biotic vs. Abiotic Origins of ‘Bio’signatures: Clues from Messy Prebiotic Chemistry for Detection of Life in the Universe

open access: yes, 2023
It is not a stretch to say that the search for extraterrestrial life is possibly the biggest of the cosmic endeavors that humankind has embarked upon.
Niraja V. Bapat   +3 more
core   +1 more source

Plankton samples of inland waters : [catalog]

open access: yes, 2022
The number of sampled waterbodies was 1017. Most of the samples (22,900) have been collected from Estonia. There are also more than 800 samples from Russia (mainly from the eastern and southern part of Lake Peipsi) and ca 100 from other countries.
Estonian University of Life Sciences. Institute of Agricultural and Environmental Sciences. Chair of Hydrobiology and Fisheries
core   +1 more source

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