Results 131 to 140 of about 26,897,002 (317)

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

Psychometric Evaluation of the Physical Activity Enjoyment Scale in Adults with Functional Limitations [PDF]

open access: yes, 2016
Enjoyment is an important construct for understanding physical activity participation, and it has not been examined in adults with functional limitations.
Bekhet, Abir K.   +2 more
core   +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

Including Item Characteristics in the Probabilistic Latent Semantic Analysis Model for Collaborative Filtering [PDF]

open access: yes
We propose a new hybrid recommender system that combines some advantages of collaborative and content-based recommender systems. While it uses ratings data of all users, as do collaborative recommender systems, it is also able to recommend new items and ...
Kagie, M.   +2 more
core   +1 more source

Reducing the length of a Goldberg Based Personality Questionnaire using Item Response Theory & Confirmatory Factor Analysis : a thesis presented in partial fulfilment of the requirements for the degree of Masters of Science in Psychology at Massey University, Albany, New Zealand [PDF]

open access: yes, 2006
Objectives: This study seeks to reconstitute an existing personality questionnaire by identifying the items that capture the best quality information as measured through item Response Theory (IRT).
Phillips, Nathan Conrad
core  

Protein pyrophosphorylation by inositol pyrophosphates — detection, function, and regulation

open access: yesFEBS Letters, EarlyView.
Protein pyrophosphorylation is an unusual signaling mechanism that was discovered two decades ago. It can be driven by inositol pyrophosphate messengers and influences various cellular processes. Herein, we summarize the research progress and challenges of this field, covering pathways found to be regulated by this posttranslational modification as ...
Sarah Lampe   +3 more
wiley   +1 more source

Pour évaluer les qualités docimologiquesdes tests de maîtrise : l’intérêt de recourir à la généralisabilité

open access: yesMesure et Évaluation en Éducation, 2010
Bien des épreuves pédagogiques, contrôlant périodiquement les connaissances et compétences des apprenants, se présentent comme des tests de maîtrise. Elles visent en effet l’évaluation des acquis fixés comme objectifs par le plan d’études et sont souvent
Daniel Bain
doaj   +1 more source

ltm: An R Package for Latent Variable Modeling and Item Response Analysis [PDF]

open access: yes
The R package ltm has been developed for the analysis of multivariate dichotomous and polytomous data using latent variable models, under the Item Response Theory approach.
Dimitris Rizopoulos
core   +1 more source

Substrate specificity of Burkholderia pseudomallei multidrug transporters is influenced by the hydrophilic patch in the substrate‐binding pocket

open access: yesFEBS Letters, EarlyView.
Multidrug transporters BpeB and BpeF from the Gram‐negative pathogen Burkholderia pseudomallei have a hydrophilic patch in their substrate‐binding pocket. Drug susceptibility tests and growth curve analyses using an Escherichia coli recombinant expression system revealed that the hydrophilic patches of BpeB and BpeF are involved in the substrate ...
Ui Okada, Satoshi Murakami
wiley   +1 more source

Function‐driven design of a surrogate interleukin‐2 receptor ligand

open access: yesFEBS Letters, EarlyView.
Interleukin (IL)‐2 signaling can be achieved and precisely fine‐tuned through the affinity, distance, and orientation of the heterodimeric receptors with their ligands. We designed a biased IL‐2 surrogate ligand that selectively promotes effector T and natural killer cell activation and differentiation. Interleukin (IL) receptors play a pivotal role in
Ziwei Tang   +9 more
wiley   +1 more source

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