Results 91 to 100 of about 5,799,011 (326)
Periodic boundary value problems for first order difference equations
Electronic Journal of Qualitative Theory of Differential Equations, 2012 In this paper, existence criteria for single and multiple positive solutions of some of periodic boundary value problems for first order difference equation \[\left\{\begin{array}{ll} \Delta x(k)+f(k,x(k+1))=0, & k\in \left[ 0,T\right] ,\\ x(0)=x(T+1), &
Wen Guan, Suang-Hong Ma, Da-Bin Wang
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Revealing the structure of land plant photosystem II: the journey from negative‐stain EM to cryo‐EM
FEBS Letters, EarlyView.Advances in cryo‐EM have revealed the detailed structure of Photosystem II, a key protein complex driving photosynthesis. This review traces the journey from early low‐resolution images to high‐resolution models, highlighting how these discoveries deepen our understanding of light harvesting and energy conversion in plants.
Roman Kouřil
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Multiple positive solutions for second order impulsive differential equation
Electronic Journal of Qualitative Theory of Differential Equations, 2013 We investigate the existence of at least three positive solutions to a three-point boundary value problem of second order impulsive differential equation. Our analysis rely on the Avery-Peterson fixed point theorem in a cone.
Weihua Jiang, Qiang Zhang, Weiwei Guo
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Positive solutions of the diophantine equation
International Journal of Mathematics and Mathematical Sciences, 1981 Integral solutions of x3 + λy + 1 − xyz = 0 are observed for all integral λ. For λ = 2 the 13 solutions of the equation in positive integers are determined. Solutions of the equation in positive integers were previously determined for the case λ = 1.
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Positive solutions of elliptic nonpositone problems
Differential and Integral Equations, 1992 The authors give conditions for the existence or nonexistence of positive solutions of second order subcritical elliptic nonpositone problems. No assumption is made that the problems be radial nor that they possess a variational structure.
W. Allegretto +2 more
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Mapping the evolution of mitochondrial complex I through structural variation
FEBS Letters, EarlyView.Respiratory complex I (CI) is crucial for bioenergetic metabolism in many prokaryotes and eukaryotes. It is composed of a conserved set of core subunits and additional accessory subunits that vary depending on the organism. Here, we categorize CI subunits from available structures to map the evolution of CI across eukaryotes. Respiratory complex I (CI)
Dong‐Woo Shin +2 more
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Even number of positive solutions for 3nth order three-point boundary value problem on time scales
Electronic Journal of Qualitative Theory of Differential Equations, 2011 We establish the existence of at least two positive solutions for the 3nth order three-point boundary value problem on time scales by using Avery-Henderson fixed point theorem.
K. Prasad, N. Sreedhar
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FEBS Letters, EarlyView.Enteropathogenic E. coli (EPEC) infects the human intestinal epithelium, resulting in severe illness and diarrhoea. In this study, we compared the infection of cancer‐derived cell lines with human organoid‐derived models of the small intestine. We observed a delayed in attachment, inflammation and cell death on primary cells, indicating that host ...
Mastura Neyazi +5 more
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Electronic Journal of Qualitative Theory of Differential Equations, 2016 We study a variational property on the evolutionary bifurcation curves for the one-dimensional perturbed Gelfand problem from combustion theory \begin{equation*} \begin{cases} u^{\prime \prime }(x)+\lambda \exp \left( \frac{au}{a+u}\right) =0, & -10$ is ...
Shao-Yuan Huang, Shin-Hwa Wang
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