Results 61 to 70 of about 889,852 (360)

The chronobiology of migraine: a systematic review

The Journal of Headache and Pain, 2021
Background The paroxysmal nature of migraine is a hallmark of the disease. Some patients report increased attack frequency at certain seasons or towards the end of the week, while others experience diurnal variations of migraine attack onset.
Amanda Holmen Poulsen, Samaira Younis, Janu Thuraiaiyah, Messoud Ashina   +3 more
doaj   +1 more source

Preparation and characterization of renal cell peptides from fetal rats for their antitumor activity

FEBS Open Bio, EarlyView.
This study aimed to prepare renal cells (RCs) from fetal rats which were digested by enzymes. Candidate peptides RCPs were characterized by capillary HPLC and MS and their bioactivity was predicted using peptideranker. The predicted top 10 bioactive peptides were synthesized.
Zhe Zhang, Yuan Cao, Jing Du, Ying Zhang, Junxia Wang, Ying Yuan, Lianqing Sun   +6 more
wiley   +1 more source

Sensitivity analysis of residency and site fidelity estimations to variations in sampling effort and individual catchability Análisis de sensibilidad en estimaciones de residencia y fidelidad al sitio a variaciones en el esfuerzo y capturabilidad individual

Revista Mexicana de Biodiversidad, 2012
Mark-recapture techniques are fundamental for assessing marine mammal population dynamics and individual temporal patterns. Since biases imposed by field conditions are generally unknown, we simulated variations in sampling effort (m) and maximum ...
Eduardo Morteo, Axayácatl Rocha-Olivares, Rodrigo Morteo   +2 more
doaj  

$R_0$ and the global behavior of an age-structured SIS epidemic model with periodicity and vertical transmission

Mathematical Biosciences and Engineering, 2014
In this paper, we study an age-structured SIS epidemic model with periodicity and vertical transmission. We show that the spectral radius of the Fréchet derivative of a nonlinear integral operator plays the role of a threshold value for the global ...
Toshikazu Kuniya, Mimmo Iannelli
doaj   +1 more source

Nitric oxide‐forming nitrite reductases in the anaerobic ammonium oxidizer Kuenenia stuttgartiensis

FEBS Open Bio, EarlyView.
Anammox bacteria remove fixed nitrogen from their environment via anaerobic ammonium oxidation (anammox) with nitrite as electron acceptor and dinitrogen gas as product. The first anammox step is the conversion of nitrite to nitric oxide by nitrite reductase.
Femke J. Vermeir, Lotte W. Nijman, Robert S. Jansen, Laura van Niftrik, Wouter Versantvoort   +4 more
wiley   +1 more source

Fractional Differential Equations with Impulsive Effects

Fractal and Fractional
This paper discusses impulsive effects on fractional differential equations. Two approaches are taken to obtain our results: either with fixed or changing lower limits in Caputo fractional derivatives.
Michal Fečkan, Marius-F. Danca, Guanrong Chen   +2 more
doaj   +1 more source

Polydatin ameliorates ovalbumin‐induced asthma in a rat model through NCOA4‐mediated ferroautophagy and ferroptosis pathway

FEBS Open Bio, EarlyView.
In this research, a rat model of asthma was created using OVA, and polydatin served as an intervention. By inhibiting ferroautophagy mediated by NCOA4 and averting ferroptosis, polydatin has been demonstrated to reduce asthma. This work presents new ideas for investigating the mechanism of polydatin's ability to alleviate asthma, in addition to ...
Wei Li, Yuwei Tang, Wenkang Liu, Fang Fang, Jiepeng Wang, Chaoyi Fang   +5 more
wiley   +1 more source

Unveiling Temporal Cyclicities in Seismic b-Values and Major Earthquake Events in Japan by Local Singularity Analysis and Wavelet Methods

Fractal and Fractional
Studying the temporal characteristics of earthquake activity contributes to enhancing earthquake prediction capabilities. The seismic b-value is a key indicator describing the relationship between seismic frequency and magnitude.
Siyuan Li, Yuanzhi Zhou, Qiuming Cheng
doaj   +1 more source

Periodicity Pitch Perception

Frontiers in Neuroscience, 2020
This study presents a computational model to reproduce the biological dynamics of “listening to music.” A biologically plausible model of periodicity pitch detection is proposed and simulated.
Frank Klefenz, Tamas Harczos, Tamas Harczos, Tamas Harczos   +3 more
doaj   +1 more source

Fetal Akinesia/Hypokinesia and Arthrogryposis of Neuromuscular Origin: Etiologic Groups, Genetics, and Phenotypic Spectrum

Annals of Clinical and Translational Neurology, EarlyView.
ABSTRACT Objective To provide a comprehensive clinical and genetic characterization of individuals with arthrogryposis multiplex congenita (AMC), focusing on the distribution of genetic etiologies across the neuromuscular spectrum and comparing myogenic and neurogenic subtypes. Methods A total of 105 individuals with AMC were clinically and genetically
Florencia Pérez‐Vidarte, Berta Estévez‐Arias, Leslie Matalonga, Delia Yubero, Anna Codina, Carlos Ortez, Julita Medina, Lidia DeSena DeCabo, Laura Carrera‐García, Jesica Expósito‐Escudero, Cristina Jou, Eduardo F. Tizzano, Andres Nascimento, Daniel Natera‐de Benito   +13 more
wiley   +1 more source