Search results for "9a"

showing 10 items of 53 documents

Volcanological evolution of Pantelleria Island (Strait of Sicily) peralkaline volcano: a review

2022

International audience; Pantelleria volcano has a particularly intriguing evolutionary history intimately related to the peralkaline composition of its explosively erupted magmas. Due to the stratigraphic complexity, studies over the last two decades have explored either only the pre-Green Tuff ignimbrite volcanism or the post-Green Tuff activity. We here focus on the whole evolutionary history, detailing the achievements since the first pioneering studies, in order to illustrate how the adoption and integration of progressively more accurate methods (40 Ar/ 39 Ar, paleomagnetism, petrography, and detailed field study) have provided many important independent answers to unresolved questions…

PaleomagnetismPaleomagnetism010504 meteorology & atmospheric sciences[SDU.STU]Sciences of the Universe [physics]/Earth SciencesVolcanismVolcanic explosivity index010502 geochemistry & geophysics01 natural sciencesPeralkaline rockPetrographyPaleontologyCalderaRheomorphism0105 earth and related environmental sciencesGeneral Environmental Sciencegeographygeography.geographical_feature_categoryIgnimbritesPeralkaline volcanismSettore GEO/07 - Petrologia E Petrografia40 Ar/ 39 ArVolcano[SDU]Sciences of the Universe [physics]Period (geology)General Earth and Planetary SciencesPeralkaline volcanism Ignimbrites Paleomagnetism 40Ar/39Ar RheomorphismGeology
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Torsors for Difference Algebraic Groups

2016

We introduce a cohomology set for groups defined by algebraic difference equations and show that it classifies torsors under the group action. This allows us to compute all torsors for large classes of groups. We also develop some tools for difference algebraic geometry and present an application to the Galois theory of differential equations depending on a discrete parameter.

Pure mathematicsGroup (mathematics)Applied MathematicsGeneral Mathematics12H10 20G10 14L15 39A05Mathematics - Rings and AlgebrasCommutative Algebra (math.AC)Mathematics - Commutative AlgebraCohomologyAction (physics)Set (abstract data type)Mathematics - Algebraic GeometryRings and Algebras (math.RA)Mathematics::K-Theory and HomologyFOS: MathematicsAlgebraic numberAlgebraic Geometry (math.AG)Mathematics
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The Fatou coordinate for parabolic Dulac germs

2017

We study the class of parabolic Dulac germs of hyperbolic polycycles. For such germs we give a constructive proof of the existence of a unique Fatou coordinate, admitting an asymptotic expansion in the power-iterated log scale.

Pure mathematicsMonomialClass (set theory)Mathematics::Dynamical SystemsConstructive proofLogarithmTransseries[MATH.MATH-DS]Mathematics [math]/Dynamical Systems [math.DS]orbitsDulac germAsymptotic expansionDynamical Systems (math.DS)01 natural sciencesMSC: 37C05 34C07 30B10 30B12 39A06 34E05 37C10 37C1537C05 34C07 30B10 30B12 39A06 34E05 37C10 37C15Mathematics::Algebraic GeometryFOS: Mathematics0101 mathematicsMathematics - Dynamical SystemsMathematicsDulac germ ; Fatou coordinate ; Embedding in a flow ; Asymptotic expansion ; TransseriesdiffeomorphismsMathematics::Complex VariablesApplied Mathematics010102 general mathematicsFatou coordinate010101 applied mathematicsclassificationnormal formsepsilon-neighborhoodsEmbedding in a flowAsymptotic expansionAnalysis
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Unfolding the double shuffle structure of q-multiple zeta values

2015

We exhibit the double q-shuffle structure for the qMZVs recently introduced by Y. Ohno, J. Okuda and W. Zudilin.

Pure mathematicsNumber theory11M32 39A13Mathematics - Number TheoryGeneral MathematicsRegularization (physics)Jackson integralFOS: MathematicsNumber Theory (math.NT)[MATH]Mathematics [math]16. Peace & justice[MATH.MATH-NT]Mathematics [math]/Number Theory [math.NT]Mathematics
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miR-29s: A family of epi-miRNAs with therapeutic implications in hematologic malignancies

2015

A wealth of studies has highlighted the biological complexity of hematologic malignancies and the role of dysregulated signal transduction pathways. Along with the crucial role of genetic abnormalities, epigenetic aberrations are nowadays emerging as relevant players in cancer development, and significant research efforts are currently focusing on mechanisms by which histone post-translational modifications, DNA methylation and noncoding RNAs contribute to the pathobiology of cancer. As a consequence, these studies have provided the rationale for the development of epigenetic drugs, such as histone deacetylase inhibitors and demethylating compounds, some of which are currently in advanced p…

ReviewTumor initiationhematologic malignancieEpigenesis GeneticmicroRNAmedicineAnimalsHumansMolecular Targeted TherapyEpigeneticsmiR-29cbiologymiR-29abusiness.industrymiR-29bCancerDNA Methylationhematologic malignanciesmedicine.diseasemultiple myelomaMicroRNAsHistoneOncologyHematologic NeoplasmsDNA methylationImmunologyCancer researchbiology.proteinHistone deacetylaseSignal transductionbusiness
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CCDC 1583208: Experimental Crystal Structure Determination

2018

Related Article: Nicolas Sok, Claire Bernhard, Pauline Désogère, Christine Goze, Yoann Rousselin, Frédéric Boschetti, Isabelle Baglin, Franck Denat|2018|Eur.J.Org.Chem.|2018|4762|doi:10.1002/ejoc.201800801

Space GroupCrystallography1-(anthracen-9-yl)-N-[(9b9c-dimethyldecahydro-5H-2a4a7a9a-tetraazacyclopenta[cd]phenalen-1-yl)methyl]methanimineCrystal SystemCrystal StructureCell ParametersExperimental 3D Coordinates
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CCDC 866800: Experimental Crystal Structure Determination

2012

Related Article: A.V.B.Djoumessi, L.P.Sandjo, J.C.Liermann, D.Schollmeyer, V.Kuete, V.Rincheval, A.M.Berhanu, S.O.Yeboah, P.Wafo, B.T.Ngadjui, T.Opatz|2012|Tetrahedron|68|4621|doi:10.1016/j.tet.2012.04.027

Space GroupCrystallography1327-Cyclo-19alpha-hydroxy-3-oxo-24-nor-olean-11-en-28-oic acidCrystal SystemCrystal StructureCell ParametersExperimental 3D Coordinates
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CCDC 866801: Experimental Crystal Structure Determination

2012

Related Article: A.V.B.Djoumessi, L.P.Sandjo, J.C.Liermann, D.Schollmeyer, V.Kuete, V.Rincheval, A.M.Berhanu, S.O.Yeboah, P.Wafo, B.T.Ngadjui, T.Opatz|2012|Tetrahedron|68|4621|doi:10.1016/j.tet.2012.04.027

Space GroupCrystallography1327-Cyclo-3alpha19alpha-dihydroxyolean-11-ene-2428-dioic acid methanol solvateCrystal SystemCrystal StructureCell ParametersExperimental 3D Coordinates
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CCDC 902371: Experimental Crystal Structure Determination

2013

Related Article: P.Desogere,C.Bernhard,C.Goze,M.-J.Penouilh,Y.Rousselin,F.Denat|2013|Eur.J.Org.Chem.|2013|1538|doi:10.1002/ejoc.201201337

Space GroupCrystallography2a7a-Dibenzyl-1-cyanodecahydro-5H-4a9a-diaza-2a7a-diazoniacyclopenta[cd]phenalene dibromide trihydrateCrystal SystemCrystal StructureCell ParametersExperimental 3D Coordinates
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CCDC 902370: Experimental Crystal Structure Determination

2013

Related Article: P.Desogere,C.Bernhard,C.Goze,M.-J.Penouilh,Y.Rousselin,F.Denat|2013|Eur.J.Org.Chem.|2013|1538|doi:10.1002/ejoc.201201337

Space GroupCrystallography2a-Benzyl-1-cyanodecahydro-5H-4a7a9a-triaza-2a-azoniacyclopenta[cd]phenalene bromide methanol solvateCrystal SystemCrystal StructureCell ParametersExperimental 3D Coordinates
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