Results 31 to 40 of about 895,341 (164)

Emergence of catalytic function in prebiotic information-coding polymers

open access: yeseLife
Life as we know it relies on the interplay between catalytic activity and information processing carried out by biological polymers. Here we present a plausible pathway by which a pool of prebiotic information-coding oligomers could acquire an early ...
Alexei V Tkachenko, Sergei Maslov
doaj   +1 more source

La Création du Monde, Œuvre monumentale de Jean-Pierre Pincemin  

open access: yesCeROArt : Conservation, Exposition, Restauration d'Objets d'Art, 2010
This article describes a study of a huge work of art realized by Jean-Pierre Pincemin which state of conservation was in a necessity of emergency restoration.
Coline Braye
doaj   +1 more source

Linker-Free Synthesis of Antimicrobial Peptides Using a Novel Cleavage Reagent: Characterisation of the Molecular and Ionic Composition by nanoESI-HR MS

open access: yesPharmaceutics, 2023
The efficient preparation of novel bioactive peptide drugs requires the availability of reliable and accessible chemical methodologies together with suitable analytical techniques for the full characterisation of the synthesised compounds.
Roser Segovia   +4 more
doaj   +1 more source

Characterization of Eucalyptus maidenii Timber for Structural Application: Physical and Mechanical Properties at Two Moisture Conditions

open access: yesSouth-East European Forestry, 2018
Background and Purpose: Eucalypt is an important raw material source of several industrial purposes. However, some eucalypt essences are still underutilized, possibly due to the lack of more embracing information about their properties.
Marta Cristina de Jesus Albuquerque Nogueira   +7 more
doaj   +1 more source

Zebrafish Embryos Display Characteristic Bioelectric Signals during Early Development

open access: yesCells, 2022
Bioelectricity is defined as endogenous electrical signaling mediated by the dynamic distribution of charged molecules. Recently, increasing evidence has revealed that cellular bioelectric signaling is critical for regulating embryonic development ...
Martin R. Silic   +4 more
doaj   +1 more source

Characterization of factors involved in the coupling of 3' end processing and splicing and in the 3' end formation of mRNA precursors [PDF]

open access: yes, 2006
Eukaryotic mRNA precursors are processed at their 5’ and 3’ ends and are spliced prior to their export from the nucleus to the cytoplasm. Although all three processing reactions can be studied separately in vitro, they are coupled in vivo.
Kyburz Kooznetsoff, Andrea Martina
core   +1 more source

Reconstitution of CPSF active in polyadenylation: recognition of the polyadenylation signal by WDR33 [PDF]

open access: yes, 2014
Cleavage and polyadenylation specificity factor (CPSF) is the central component of the 3' processing machinery for polyadenylated mRNAs in metazoans: CPSF recognizes the polyadenylation signal AAUAAA, providing sequence specificity in both pre-mRNA ...
Zavolan, Mihaela   +7 more
core   +1 more source

Metal-free reductive cleavage of c-o sigma-bonds in acyloin derivatives by an organic neutral super-electron-donor

open access: yes, 2009
Neutral organic electron-donor 7, formally a pyridinylidene carbene dimer, effects reductive cleavage of C-O sigma-bonds in acyloin derivatives Ar(CO)CRR'OX (X = OAc, OPiv, OBz, OMs) and this represents the first cleavage of C-O sigma-bonds by a neutral ...
Cutulic, S.P.Y.   +4 more
core   +3 more sources

Treatment with Exogenous Trypsin Expands In Vitro Cellular Tropism of the Avian Coronavirus Infectious Bronchitis Virus

open access: yesViruses, 2020
The Gammacoronavirus infectious bronchitis virus (IBV) causes a highly contagious and economically important respiratory disease in poultry. In the laboratory, most IBV strains are restricted to replication in ex vivo organ cultures or in ovo and do not ...
Phoebe Stevenson-Leggett   +2 more
doaj   +1 more source

The Effects of Ethanol and Strontium on Growth and Development of Two-Cell Arrested Mouse Embryos [PDF]

open access: yesInternational Journal of Fertility and Sterility, 2012
Background Arresting at a certain stage of development like the two-cell stage could be one of the causes of infertility. The aim of this study is to evaluate the effects of ethanol and strontium on growth and development of mice embryos arrested at ...
Mohammad Reza Darabi   +2 more
doaj  

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