Results 81 to 90 of about 324,788 (288)

The local $h$-vector of the cluster subdivision of a simplex [PDF]

, 2012
The cluster complex $\Delta (\Phi)$ is an abstract simplicial complex, introduced by Fomin and Zelevinsky for a finite root system $\Phi$. The positive part of $\Delta (\Phi)$ naturally defines a simplicial subdivision of the simplex on the vertex set of
Athanasiadis, Christos A., Savvidou, Christina   +1 more
core   +2 more sources

Marriage \`a-la-MOND: Baryonic dark matter in galaxy clusters and the cooling flow puzzle

, 2008
I start with a brief introduction to MOND phenomenology and its possible roots in cosmology--a notion that may turn out to be the most far reaching aspect of MOND.
Afshordi, Aguirre, Angus, Barnes, Bauer, Begeman, Bekenstein, Bekenstein, Bekenstein, Bottema, Bournaud, Brada, Brada, Brada, Brada, Bruneton, Carr, Chuzhoy, Clowe, Corbelli, de Blok, Fohlmeister, Fukugita, Gentile, Gentile, Genzel, Gerbal, Hennawi, Jee, Kalberla, Kamaya, Kent, Mahdavi, McGaugh, McGaugh, Milgrom, Milgrom, Milgrom, Milgrom, Milgrom, Milgrom, Milgrom, Milgrom, Milgrom, Milgrom, Milgrom, Milgrom, Milgrom, Milgrom, Milgrom, Milgrom, Milgrom, Milgrom, Mordehai Milgrom, Nipoti, Omma, Peterson, Peterson, Pfenniger, Pointecouteau, Sanders, Sanders, Sanders, Sanders, Sanders, Sanders, Sanders, Sanders, Sanders, The, Tiret, Walker, Wu   +72 more
core   +1 more source

A methionine‐lined active site governs carbocation stabilization and product specificity in a bacterial terpene synthase

FEBS Letters, EarlyView.
This study reveals a unique active site enriched in methionine residues and demonstrates that these residues play a critical role by stabilizing carbocation intermediates through novel sulfur–cation interactions. Structure‐guided mutagenesis further revealed variants with significantly altered product profiles, enhancing pseudopterosin formation. These
Marion Ringel, Carl P. O. Helmer, Shani Zev, Ronja Driller, Emily Buhr, Markus Reinbold, Renana Schwartz, Gabriel Foley, Mikael Boden, Daniel Garbe, Gerhard Schenk, Dan Thomas Major, Bernhard Loll, Thomas Brück   +13 more
wiley   +1 more source

Cluster Root Formation in Macadamia integrifolia Seedlings: Responses to Phosphorus and Variation Among Grafted Scions

Agronomy
Cluster roots enhance phosphorus (P) acquisition in macadamia (Macadamia integrifolia), yet their development under different P levels and effects of different grafted scion/rootstock combinations are not well understood. This study examined cluster root
Kwanho Jeong, Suzy Rogiers, Abraham J. Gibson, Jos Mieog, Manisha Thapa, Tobias Kretzschmar, Bronwyn J. Barkla, Terry J. Rose   +7 more
doaj   +1 more source

Metabolic adaptations of white lupin roots and shoots under phosphorus deficiency

Frontiers in Plant Science, 2015
White lupin (Lupinus albus L.) is highly adapted to phosphorus-diminished soils. P-deficient white lupin plants modify their root architecture and physiology to acquire sparingly available soil phosphorus. We employed gas chromatography–mass spectrometry
Julia eMüller, Christian eZörb, Karsten eNiehaus, Victoria eGödde   +3 more
doaj   +1 more source

The neural crest‐associated gene ERRFI1 is involved in melanoma progression and resistance toward targeted therapy

Molecular Oncology, EarlyView.
ERRFI1, a neural crest (NC)‐associated gene, was upregulated in melanoma and negatively correlated with the expression of melanocytic differentiation markers and the susceptibility of melanoma cells toward BRAF inhibitors (BRAFi). Knocking down ERRFI1 significantly increased the sensitivity of melanoma cells to BRAFi.
Nina Wang, Qian Sun, Daniel Novak, Lei Zhu, Juliane Poelchen, Tamara Steinfass, Yiman Wang, Viktor Umansky, Jochen Utikal   +8 more
wiley   +1 more source

Towards Robust Demographic Models: A Systematic Approach to 14C Data Aggregation and Analysis: Lessons from the Southern Levant

Journal of Open Archaeology Data
This study presents a robust seven-step framework for curating and analysing extensive radiocarbon (14C) datasets, optimised to construct accurate Summed Probability Distribution (SPD) models.
Magdalena Maria Elisabeth Bunbury
doaj   +1 more source

Unsupervised induction of Arabic root and pattern lexicons using machine learning [PDF]

, 2013
We describe an approach to building a morphological analyser of Arabic by inducing a lexicon of root and pattern templates from an unannotated corpus. Using maximum entropy modelling, we capture orthographic features from surface words, and cluster the ...
Carroll, John, Khaliq, Bilal
core   +1 more source

Quivers with relations arising from clusters (A_n case)

, 2004
Cluster algebras were introduced by S. Fomin and A. Zelevinsky in connection with dual canonical bases. Let U be a cluster algebra of type A_n. We associate to each cluster C of U an abelian category Cat_C such that the indecomposable objects of Cat_C ...
Caldero, Philippe, Chapoton, Frederic, Schiffler, Ralf   +2 more
core   +1 more source

Cytoplasmic p21 promotes stemness of colon cancer cells via activation of the NFκB pathway

Molecular Oncology, EarlyView.
Cytoplasmic p21 promotes colorectal cancer stem cell (CSC) features by destabilizing the NFκB–IκB complex, activating NFκB signaling, and upregulating BCL‐xL and COX2. In contrast to nuclear p21, cytoplasmic p21 enhances spheroid formation and stemness transcription factor CD133.
Arnatchai Maiuthed, Kerstin Huebner, Katharina Erlenbach‐Wuensch, Chuanpit Hampel, Daniela Thalheim, Adriana Vial‐Roehe, Bodee Nutho, Susanne Merkel, Arndt Hartmann, Pithi Chanvorachote, Regine Schneider‐Stock   +10 more
wiley   +1 more source