Periodic positive solutions of superlinear delay equations via topological degree. [PDF]
Philos Trans A Math Phys Eng Sci, 2021 Amster P, Benevieri P, Haddad J.
europepmc +1 more source
Positive solutions for the one-dimensional Sturm-Liouville superlinear p-Laplacian problem
Electronic Journal of Differential Equations, 2018 We prove the existence of positive classical solutions for the p-Laplacian problem $$\displaylines{ -(r(t)\phi (u'))'=f(t,u),\quad t\in (0,1), \cr au(0)-b\phi ^{-1}(r(0))u'(0)=0,\ cu(1)+d\phi ^{-1}(r(1))u'(1)=0, }$$ where $\phi (s)=|s|^{p-2}s$, $p ...
Khanh Duc Chu, Dang Dinh Hai
doaj
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
wiley +1 more source
Positive solutions of systems of perturbed Hammerstein integral equations with arbitrary order dependence. [PDF]
Philos Trans A Math Phys Eng Sci, 2021 Infante G.
europepmc +1 more source
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
wiley +1 more source
The Phenomenon of Social and Pastoral Service in Eastern Slovakia and Northwestern Czech Republic during the COVID-19 Pandemic: Comparison of Two Selected Units of Former Czechoslovakia in the Context of the Perspective of Positive Solutions. [PDF]
Int J Environ Res Public Health, 2022 Maturkanič P +8 more
europepmc +1 more source
Nonexistence of radial positive solutions for a nonpositone problem
Electronic Journal of Differential Equations, 2011 In this article we study the nonexistence of radial positive solutions for a nonpositone problem when the nonliearity is superlinear and has more than one zero.
Said Hakimi, Abderrahim Zertiti
doaj
Positive radial solutions for Dirichlet problems in the ball
, 2023 Petru Jebelean +2 more
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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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