Results 131 to 140 of about 6,090,423 (307)
A Tutte Polynomial for Partially Ordered Sets
Journal of Combinatorial Theory, Series B, 1993 We investigate the Tutte polynomial of a greedoid associated to a partially ordered set. In this case, we explore the deletion-contraction formula in two ways and develop an antichain expansion for the polynomial. We show that the polynomial can determine the number of order ideals, order filters and antichains of all sizes of a poset \(P\), but ...
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FEBS Letters, EarlyView.Synechocystis strains deficient in succinate dehydrogenase (SDH) secrete more succinate than the WT under dark anaerobic conditions, supporting that SDH then primarily acts as SDH, not as a fumarate reductase. L‐aspartate oxidase (Laspo) from Synechocystis is functional under anaerobic conditions, reducing fumarate to succinate.
Kateryna Kukil +3 more
wiley +1 more source
Metrics on partially ordered sets—A survey
Discrete Mathematics, 1981 AbstractWe review more or less recent results on metrics associated with valuations or (and) minimum weighted paths in posets, metric characterizations of posets and we point out some applications of these results to problems involving uses of distances in social sciences.
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Artificial molecular machines and motors—Design and control of nanoscale motion
FEBS Letters, EarlyView.Molecules are constantly moving because of thermal fluctuations, but random motion alone cannot be exploited to perform directional tasks. Artificial molecular machines use chemical, electrical, or light energy to bias this motion. Molecular shuttles, rotary motors, and supramolecular pumps illustrate how nanoscale movement can be controlled and ...
Leonardo Andreoni, Alberto Credi
wiley +1 more source
پژوهشهای ریاضی, 2021 For an f-ring with bounded inversion property, we show that , the set of all basic z-ideals of , partially ordered by inclusion is a bounded distributive lattice.
Ali Taherifar
doaj
Partially Ordered Sets Associated with Permutations
European Journal of Combinatorics, 1989 Let \(\Sigma\) be a set of permutations of \([n]=\{1,...,n\}\). A poset P is called chain-permutational with respect to \(\Sigma\) iff the edges of the Hasse diagram of P can be labeled with labels from [n] so that the sequence of labels along each maximal chain of P is a permutation in \(\Sigma\), each permutation in \(\Sigma\) arises exactly once in ...
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Leucine‐rich glioma inactivated 1 (LGI1) is a ganglioside‐binding protein
FEBS Letters, EarlyView.Neuronal hyperexcitability associated with a decrease/absence of the extracellular protein LGI1 has been suggested to be primarily due to the downregulation of Kv1 channel expression. The molecular mechanisms underlying this decrease have not yet been elucidated.
Kévin Debreux +7 more
wiley +1 more source
, 1989 Summary. In the beginning of this article we define the choice function of a nonempty set family that does not contain /0 as introduced in [6, pages 88–89].
Wojciech A. Trybulec
core
Metastatic niche shaped by host factors influences disseminated cancer cell fate
FEBS Letters, EarlyView.Metastasis is shaped not only by cancer cells but also by the environments they encounter. This review explores how factors such as aging, diet, the microbiome, lifestyle, and environmental exposures remodel organ‐specific niches in the lung, liver, bone, and brain, influencing where metastatic cells survive, remain dormant, or grow, and ultimately ...
Gwennan Delyth Ward +2 more
wiley +1 more source
FEBS Letters, EarlyView.Transient oligomers formed by intrinsically disordered proteins may be ‘invisible’ to direct detection yet remain accessible to solution NMR through equilibrium‐exchange measurements and pressure‐jump experiments. Complementary methods report on mass, stoichiometry, selected distance distributions, morphology, and internal packing.
Martin D. Gelenter, Ad Bax
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