Results 101 to 110 of about 15,333,834 (330)
An intracellular transporter mitigates the CO2‐induced decline in iron content in Arabidopsis shoots
FEBS Letters, EarlyView.This study identifies a gene encoding a transmembrane protein, MIC, which contributes to the reduction of shoot Fe content observed in plants under elevated CO2. MIC is a putative Fe transporter localized to the Golgi and endosomal compartments. Its post‐translational regulation in roots may represent a potential target for improving plant nutrition ...
Timothy Mozzanino +7 more
wiley +1 more source
Nuclear Physics B, 2010 59 pages, 8 tables; v2: typos corrected, discussion of gauge coupling unification and various minor comments added; v3: more typos ...
Blumenhagen, Ralph +3 more
openaire +5 more sources
F-theory with hyperelliptic fibrations
Journal of High Energy PhysicsWe discuss the role of hyperelliptic fibrations in F-theory. For each even integer n we give a noncompact Calabi-Yau threefold X containing a hyperelliptically fibered surface Y, such that X and Y are homotopy equivalent and c 2(X) = n.
E. Ballico +3 more
doaj +1 more source
Orientifold limits of singular F-theory vacua
Nuclear Physics B, 2020 We construct global orientifold limits of singular F-theory vacua whose associated gauge groups are SO(3), SO(5), SO(6), F4, SU(4), and Spin(7). For each limit we show a universal tadpole relation is satisfied, which is a homological identity whose ...
James Fullwood, Dongxu Wang
doaj +1 more source
Frozen singularities in M and F theory
, 2016 A bstractWe revisit the duality between ALE singularities in M-theory and 7-branes on a circle in F-theory. We see that a frozen M-theory singularity maps to a circle compactification involving a rotation of the plane transverse to the 7-brane, showing ...
Y. Tachikawa
semanticscholar +1 more source
F-theory and all things rational: surveying U(1) symmetries with rational sections [PDF]
, 2015 A bstractWe study elliptic fibrations for F-theory compactifications realizing 4d and 6d supersymmetric gauge theories with abelian gauge factors. In the fibration these U(1) symmetries are realized in terms of additional rational section.
C. Lawrie +2 more
semanticscholar +1 more source
FEBS Letters, EarlyView.Bifidobacterium bifidum establishes symbiosis with infants by metabolizing lacto‐N‐biose I (LNB) from human milk oligosaccharides (HMOs). The extracellular multidomain enzyme LnbB drives this process, releasing LNB via its catalytic glycoside hydrolase family 20 (GH20) lacto‐N‐biosidase domain.
Xinzhe Zhang +5 more
wiley +1 more source
, 2015 12 Pages, 1 Figure, to appear in Math ...
Bini, Gilberto, PENEGINI, MATTEO
openaire +3 more sources
Journal of High Energy PhysicsWe discuss F-theory backgrounds associated to flat torus bundles over Ricci-flat manifolds. In this setting the F-theory background can be understood as a IIB orientifold with a large radius limit described by a supersymmetric compactification of IIB ...
Peng Cheng +2 more
doaj +1 more source