Results 121 to 130 of about 22,796,869 (307)

O emprego de lipases como agentes de resolução cinética de enantiômeros em síntese orgânica: aspectos gerais sobre a influência do solvente

open access: yesQuímica Nova, 1999
In organic synthesis, lipases are the most frequently used biocatalysts. They are efficient stereoselective catalysts in the kinetic resolution of a wide variety of chiral compounds.
Costa Valentim Emilio Uberti   +1 more
doaj  

Drug-target identification in COVID-19 disease mechanisms using computational systems biology approaches

open access: yesFrontiers in Immunology
IntroductionThe COVID-19 Disease Map project is a large-scale community effort uniting 277 scientists from 130 Institutions around the globe. We use high-quality, mechanistic content describing SARS-CoV-2-host interactions and develop interoperable ...
Anna Niarakis   +108 more
doaj   +1 more source

Peptide‐based ligand antagonists block a Vibrio cholerae adhesin

open access: yesFEBS Letters, EarlyView.
The structure of a peptide‐binding domain of the Vibrio cholerae adhesin FrhA was solved by X‐ray crystallography, revealing how the inhibitory peptide AGYTD binds tightly at its Ca2+‐coordinated pocket. Structure‐guided design incorporating D‐amino acids enhanced binding affinity, providing a foundation for developing anti‐adhesion therapeutics ...
Mingyu Wang   +9 more
wiley   +1 more source

ESTUDIO COMPARATIVO ENTRE CORRELACIONES EMPÍRICAS Y MODELOS MECANÍSTICOS PARA FLUJO MULTIFÁSICO EN POZOS HORIZONTALES DE INYECCIÓN DE VAPOR

open access: yesRevista Fuentes El Reventón Energético, 2011
he steam injection in horizontal wells has great applicability to heavy oil reservoirs. However, one of the challenges of this technology is the prediction of the profiles of pressure, temperature and vapor quality along the well.
Gustavo Rojas Sosa   +1 more
doaj   +2 more sources

Multi-objective optimization in biotechnological processes: application to plant cell suspension cultures of Thevetia peruviana

open access: yesRevista Facultad de Ingeniería Universidad de Antioquia, 2018
Bioprocesses productivity is a compromise between two conflicting objectives, maximization of biomass growth rate and minimization of substrate consumption.
Adriana Patricia Villegas-Quiceño   +4 more
doaj  

Interplay between circadian and other transcription factors—Implications for cycling transcriptome reprogramming

open access: yesFEBS Letters, EarlyView.
This perspective highlights emerging insights into how the circadian transcription factor CLOCK:BMAL1 regulates chromatin architecture, cooperates with other transcription factors, and coordinates enhancer dynamics. We propose an updated framework for how circadian transcription factors operate within dynamic and multifactorial chromatin landscapes ...
Xinyu Y. Nie, Jerome S. Menet
wiley   +1 more source

Fast inference in nonlinear dynamical systems using gradient matching [PDF]

open access: yes, 2016
Parameter inference in mechanistic models of coupled differential equations is a topical problem. We propose a new method based on kernel ridge regression and gradient matching, and an objective function that simultaneously encourages goodness of ...
Filippone, Maurizio   +3 more
core  

Does "model-free" forecasting really outperform the "true" model? A reply to Perretti et al

open access: yes, 2013
Estimating population models from uncertain observations is an important problem in ecology. Perretti et al. observed that standard Bayesian state-space solutions to this problem may provide biased parameter estimates when the underlying dynamics are ...
Dormann, Carsten F., Hartig, Florian
core   +1 more source

Real‐time assay of ribonucleotide reductase activity with a fluorescent RNA aptamer

open access: yesFEBS Letters, EarlyView.
Ribonucleotide reductases (RNR) synthesize DNA building blocks de novo, making them crucial in DNA replication and drug targeting. FLARE introduces the first single‐tube real‐time coupled RNR assay, which enables isothermal tracking of RNR activity at nanomolar enzyme levels and allows the reconstruction of allosteric regulatory patterns and rapid ...
Jacopo De Capitani   +4 more
wiley   +1 more source

Disordered but rhythmic—the role of intrinsic protein disorder in eukaryotic circadian timing

open access: yesFEBS Letters, EarlyView.
Unstructured domains known as intrinsically disordered regions (IDRs) are present in nearly every part of the eukaryotic core circadian oscillator. IDRs enable many diverse inter‐ and intramolecular interactions that support clock function. IDR conformations are highly tunable by post‐translational modifications and environmental conditions, which ...
Emery T. Usher, Jacqueline F. Pelham
wiley   +1 more source

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