Results 61 to 70 of about 605,731 (305)

Gut microbiota alterations in patients with non‐small‐cell lung cancer undergoing chemoradiotherapy

open access: yesMolecular Oncology, EarlyView.
We investigated the impact of concurrent chemoradiotherapy (CRT) on the gut microbiota in patients with locally advanced non‐small‐cell lung cancer. Overall gut microbiota composition remained largely stable throughout CRT while antibiotic exposure may influence microbial diversity.
Hanne Marte Nymoen   +19 more
wiley   +1 more source

Extremal metrics on graphs I [PDF]

open access: yesform, 2002
We define a number of natural (from geometric and combinatorial points of view) deformation spaces of valuations on finite graphs, and study functions over these deformation spaces. These functions include both direct metric invariants (girth, diameter), and spectral invariants (the determinant of the Laplace operator, or complexity; bottom non-zero ...
Jakobson, Dmitry, Rivin, Igor
openaire   +2 more sources

Analysing the significance of small conformational changes and low occupancy states in serial crystallographic data

open access: yesFEBS Open Bio, EarlyView.
This protocol paper outlines methods to establish the success of a time‐resolved serial crystallographic experiment, by means of statistical analysis of timepoint data in reciprocal space and models in real space. We show how to amplify the signal from excited states to visualise structural changes in successful experiments.
Jake Hill   +4 more
wiley   +1 more source

Extremal Graphs for Intersecting Triangles

open access: yesJournal of Combinatorial Theory, Series B, 1995
A \(k\)-fan is a graph with \(2k+ 1\) vertices consisting of \(k\) 3-cycles having one vertex in common. The authors show that if \(n\geq 50k^2\) and the graph \(G_n\) has more than \([n^2/4]+ k^2- ck\) edges, where \(c\) equals 1 or 3/2 according as \(k\) is odd or even, then \(G_n\) contains a \(k\)-fan; furthermore, the bound for the number of edges
Paul Erdös   +3 more
openaire   +3 more sources

Transcripts enriched in codons that trigger P‐site tRNA‐mediated mRNA decay possess stable mRNA

open access: yesFEBS Open Bio, EarlyView.
PTMD codons were first described by Mendel et al. as mediators of an mRNA decay pathway dependent on the human protein CNOT3, homologous to yeast Not5. Our findings confirm that PTMD codons destabilize transcripts; however, unlike in yeast, the human pathway specifically targets and slightly destabilizes primarily stable mRNAs.
Rodolfo Lopes Carneiro   +1 more
wiley   +1 more source

The hyper-Zagreb index of cacti with perfect matchings

open access: yesAKCE International Journal of Graphs and Combinatorics, 2020
Let be a simple connected graph. The hyper-Zagreb index is defined as . A connected graph is a cacti if all blocks of are either edges or cycles. Let be the set of cacti of order with a perfect matching and cycles. In this paper, we determine sharp upper
Hechao Liu, Zikai Tang
doaj   +1 more source

Extremal graph theory: Ramsey-Turán numbers, chromatic thresholds, and minors [PDF]

open access: yes, 2011
This dissertation investigates several questions in extremal graph theory and the theory of graph minors. It consists of three independent parts; the first two parts focus on questions motivated by Turan's Theorem and the third part investigates a ...
Lenz, John E.
core  

MagmaFlow: A desktop platform for artificial intelligence‐driven expression analysis

open access: yesFEBS Open Bio, EarlyView.
MagmaFlow is a free, no‐code platform for gene expression analysis. It generates interactive volcano plots, links genes to literature, pathways, and diseases, prioritizes candidates using millions of publications, identifies affected biological processes, builds network diagrams, and exports publication‐ready figures and reports for macOS and Windows ...
Carlos E. Buss   +7 more
wiley   +1 more source

General Neighborhood Multiplicative Zagreb Indices: Extremal Results and Structural Characterization of Molecular Trees

open access: yesMathematics
Degree-based topological indices play a central role in characterizing graph structures and their chemical applications. Among these, multiplicative Zagreb indices have attracted considerable attention due to their strong discriminative power and ...
Mahdieh Azari   +2 more
doaj   +1 more source

Extremal Results in Random Graphs [PDF]

open access: yes, 2013
According to Paul Erdős [Some notes on Turán's mathematical work, J. Approx. Theory 29 (1980), page 4] it was Paul Turán who "created the area of extremal problems in graph theory". However, without a doubt, Paul Erdős popularized extremal combinatorics, by his many contributions to the field, his numerous questions and conjectures, and his influence ...
Rödl, Vojtěch, Schacht, Mathias
openaire   +2 more sources

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