Results 81 to 90 of about 107,525 (295)

Raman‐based label‐free microscopic analysis of the pancreas in living zebrafish larvae

FEBS Open Bio, EarlyView.
Forward stimulated Raman scattering (F‐SRS) and epi coherent anti‐Stokes Raman scattering (E‐CARS) allow label‐free discrimination of distinct subcellular structures in the pancreas of living zebrafish larvae. Given the straightforward applicability, we anticipate broad implementation of Raman microscopy in other organs and across various biomedical ...
Noura Faraj, Eline M. F. de Lange, Klaas A. Sjollema, Ben N. G. Giepmans   +3 more
wiley   +1 more source

Global Period-Doubling Bifurcation of Quadratic Fractional Second Order Difference Equation

Discrete Dynamics in Nature and Society, 2014
We investigate the local stability and the global asymptotic stability of the difference equation xn+1=αxn2+βxnxn-1+γxn-1/Axn2+Bxnxn-1+Cxn-1, n=0,1,… with nonnegative parameters and initial conditions such that Axn2+Bxnxn-1+Cxn-1>0, for all n≥0.
Senada Kalabušić, M. R. S. Kulenović, M. Mehuljić   +2 more
doaj   +1 more source

Bifurcation and chaos behaviors of Lyapunov function controlled PWM boost converter

Energy Reports, 2021
In this paper, we have derived the mathematical model of the Lyapunov function-based boost converter, which is essentially a voltage and current double-loop controller, and studied the stability of the closed-loop modulation system.
Xinbing Chen, Xiaoli Long, Wei Hu, Binsheng Xie   +3 more
doaj   +1 more source

Single‐molecule DNA flow‐stretch assays for high‐throughput DNA–protein interaction studies

FEBS Open Bio, EarlyView.
We describe an optimised single‐molecule DNA flow‐stretch assay that visualises DNA–protein interactions in real time. Linear DNA fragments are tethered to a surface and stretched by buffer flow for fluorescence imaging. Using λ and φX174 DNA, this protocol enhances reproducibility and accessibility, providing a versatile approach for studying diverse ...
Ayush Kumar Ganguli, Mohammad Nour Alsamsam, Ugnė Bagdonaitė, Van Truc Vu, Chun‐Jen Huang, Polina Kuzhir, Mindaugas Zaremba, Aurimas Kopūstas, Marijonas Tutkus   +8 more
wiley   +1 more source

Effects of Calcium-Channel Noise on Dynamics of Excitation-Contraction Coupling in Paced Cardiac Cells

Discrete Dynamics in Nature and Society, 2013
We study a simple discrete model with the impact of calcium-channel noise on the beat-to-beat dynamics of cardiac cells. The effects of the noise are assessed by bifurcation analysis and power spectrum analysis, respectively.
Jiying Ma, Dongmei Xiao
doaj   +1 more source

Influence of perturbations on period-doubling bifurcation [PDF]

Physical Review A, 1987
The influence of noise and resonant perturbation on a dynamical system in the vicinity of a period-doubling bifurcation is investigated. It is found that the qualitative dynamics can be revealed by simple considerations of the Poincar\'e map. These considerations lead to a shift of the bifurcation point which is proportional to the square of the ...
Svensmark, Henrik; id_orcid 0000-0003-2843-3417, Samuelsen, Mogens Rugholm   +1 more
openaire   +2 more sources

Exon 7 splicing of ERα predicts poor prognosis and increases phenotypic heterogeneity in luminal a subtype breast cancer

FEBS Open Bio, EarlyView.
ERα splice variant ERα∆7 lacks the C‐terminus, and its expression may change phenotypes of breast cancers. Our results showed that ERα∆7 is found in the luminal A subtype, and elevated ERα∆7 levels are linked to improved cell survival with lower proliferation and migration.
Long Wai Tsui, Taobo Hu, Thomson Christian Husein, Wai Hei Shek, Bingrong Chen, Depeng Wang, Shu Wang, Weichuan Yu, Xiaodan Fan, Mengping Long, Toyotaka Ishibashi   +10 more
wiley   +1 more source

Doubling of the gallbladder in children with intrauterine growth retardation: two clinical cases

Лечащий Врач
Background. Several variants of congenital gallbladder anomalies are distinguished: by position (median, suprahepatic, intrahepatic), shape (kinks, constrictions), number (doubling or tripling), presence of partitions in the gallbladder.
A. F. Kiosov, S. A. Mikhailova
doaj   +1 more source

Bifurcation and chaos in a discrete mutualism model with proportional harvesting rate

پژوهش‌های ریاضی, 2021
In this paper, we use the Euler method to introduce a discrete mutualism model with proportional harvesting rate and analyze its dynamics. Using the center manifold theorem, we show that the model is subjected to a period-doubling bifurcation.
Mohammad Hossein Akrami
doaj  

Dynamical complexities in a tri-trophic hybrid food chain model with Holling type II and Crowley–Martin functional responses

Nonlinear Analysis, 2010
We study how predator behavior influences community dynamics of predatorprey systems. It turns out that predator behavior plays a dominant role in community dynamics. The hybrid model studied in this paper reveals that period-doubling and period-doubling
R. K. Upadhyay, S. N. Raw, V. Rai
doaj   +1 more source