Results 51 to 60 of about 81,546 (283)

The Influence of Steric and Eletronic Effects on the Preparation of Cyclic Acetals Catalyzed by Sulfated Metal Oxides [PDF]

open access: yes, 2013
[[abstract]]Sulfated metal oxides (SMO) were able to catalyze the reaction of carbonyl compounds with ethylene glycol (EG), producing cyclic acetals at near ambient temperature.
Lin, Chiu-Hsun; Lin, Shawn D. ; Lin, Tsung-Po; Huang, Ya-Jean
core  

Intramolecular interactions in aminoacyl cyclic-3',5'-nucleotides [PDF]

open access: yes, 2007
Polymerization of amino-acid acyl cyclic-3',5'-nucleotides is postulated to be the origin of RNA and associated protein in prebiotic molecular evolution. The enthalpy change in the intramolecular interaction between the nucleotide base and the amino-acid
Bofinger, Neville D., Aylward, Nigel N.
core   +1 more source

Cell geometry and membrane protein crowding constrain Escherichia coli growth rate, overflow metabolism, respiration, and maintenance energy

open access: yesFEBS Letters, EarlyView.
The physical dimensions and shape of bacterial cells define the surface area available to acquire nutrients and the volume available for synthesizing proteins and DNA. Here, we use computational systems biology to decode the importance of cell geometry as a major determinant of prokaryotic phenotype, including growth rate and metabolic efficiency. This
Ross P. Carlson   +6 more
wiley   +1 more source

Microgastrinae (Hymenoptera: Braconidae) parasitizing Epirrita autumnata (Lepidoptera: Geometridae) larvae in Fennoscandia with description of Cotesia autumnatae Shaw, sp. n. [PDF]

open access: yes, 2013
The microgastrine subset of hymenopteran parasitoids of the geometrid Epirrita autumnata is investigated in Fennoscandia. Ecology, including population dynamics, of the moth has been intensively studied in northern and mountainous Finland, Norway and ...
Veijalainen, Anu   +13 more
core   +2 more sources

Synthesis and Characterization of Hexagonal Prism like Zinc Oxide for Electrochemical Determination of Gallic Acid in Wine Samples

open access: yesInternational Journal of Electrochemical Science, 2019
Metal oxides have stimulated significant attention due to their potential applications in various technology and applications. In this paper, facile and novel hexagonal prism like zinc oxide (HP-ZnO) has been successfully synthesized by mechanochemical ...
Kesavan Ganesh   +7 more
doaj   +1 more source

From mice to humans—divergent strategies for intestinal homeostasis and regeneration

open access: yesFEBS Letters, EarlyView.
Recent advances such as organoid genome editing, xenotransplantation, imaging, and whole‐genome sequencing have enabled direct studies of human intestinal stem cells (ISCs). These studies reveal species‐specific features, including slower ISC proliferation, distinct injury responses, slower somatic mutation accumulation in humans, and an inverse ...
Keiko Ishikawa   +2 more
wiley   +1 more source

Constitutive modelling of the behaviour of clays under cyclic loading [PDF]

open access: yes, 1989
Includes bibliography.This research work involved the implementation of a constitutive model based on plasticity theory to model the behaviour of a clay under cyclic loading.
Sellers, E J
core  

Regulation of cyclic lipopeptide biosynthesis in Pseudomonas fluorescens by the ClpP protease [PDF]

open access: yes, 2009
Cyclic lipopeptides produced by Pseudomonas species exhibit potent surfactant and broad-spectrum antibiotic properties. Their biosynthesis is governed by large multimodular nonribosomal peptide synthetases, but little is known about the genetic ...
Bruijn, I., de   +2 more
core   +1 more source

Asymmetric N-oxidation catalyzed by bisguanidinium dinuclear oxodiperoxomolybdosulfate

open access: yesNature Communications
N-oxides play a pivotal role in natural products and emerging drug design, while also serving as valuable ligand scaffolds in organometallic chemistry. Among heteroatom oxidations, the conversion of amines to N-oxides is a critical and challenging facet.
Wentao Wu   +7 more
doaj   +1 more source

Three phosphatase families form a community: The phosphohydrolases that act upon inositol pyrophosphates

open access: yesFEBS Letters, EarlyView.
Inositol pyrophosphates are energy‐rich signaling molecules that perform critical functions in cells. Three different families of phosphatases hydrolyze the β phosphate of the inositol pyrophosphate molecules: two have narrow specificities and one is promiscuous.
Ronda J. Rolfes
wiley   +1 more source

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