1,948 research outputs found
Formation and stability of a two-dimensional nickel silicide on Ni (111) an Auger, LEED, STM, and high-resolution photoemission Study
Using low energy electron diffraction (LEED), Auger electron spectroscopy
(AES), scanning tunnelling microscopy (STM) and high resolution photo-electron
spectroscopy (HR-PES) techniques we have studied the annealing effect of one
silicon monolayer deposited at room temperature onto a Ni (111) substrate. The
variations of the Si surface concentration, recorded by AES at 300{\deg}C and
400{\deg}C, show at the beginning a rapid Si decreasing followed by a slowing
down up to a plateau equivalent to about 1/3 silicon monolayer. STM images and
LEED patterns, both recorded at room temperature just after annealing, reveal
the formation of an ordered hexagonal superstructure(rot3xrot3)R30{\deg}-type.
From these observations and from a quantitative analysis of HR-PES data,
recorded before and after annealing, we propose that the (rot3 x
rot3)R30{\deg}superstructure corresponds to a two dimensional (2D) Ni2Si
surface silicide.Comment: Journal Physical Review B (2012
What is the best drug to treat COVID-19? The need for randomized controlled trials
The severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2) is currently the biggest public health challenge to the biomedical community of the last century. Despite multiple public health measures,1, 2, 3 there remains an urgent need for pharmacologic therapies to treat infected patients, minimize mortality, and decrease pressures on intensive care units and health systems and optimally, they should also decrease subsequent transmission
The curve of lines on a prime Fano threefold of genus 8
We show that a general prime Fano threefold X of genus 8 can be reconstructed
from the pair , where is its Fano curve of lines and
is the theta-characteristic which gives a natural embedding
\Gamma \subset \matbb{P}^5.Comment: 24 pages, misprints corrected, to appear in International Journal of
Mathematic
Dominant BIN1-related centronuclear myopathy (CNM) revealed by lower limb myalgia and moderate CK elevation
We report a BIN1-related CNM family with unusual clinical phenotype. The proband, a 56-year-old man suffered of lower limbs myalgia since the age of 52. Clinical examination showed short stature, mild symmetric eyelid ptosis without ophthalmoplegia, scapular winging and Achilles tendon retraction. A muscle weakness was not noted. CK levels were up to 350 UI/L. Deltoid muscle biopsy showed nuclear centralization and clustering, deep sarcolemmal invaginations and type 1 fiber hypotrophy. Whole body MRI revealed fatty infiltration of posterior legs compartments, lumbar paraspinal and serratus muscles. Myotonic dystrophy type1 and 2, Pompe disease and MTM1 and DNM2-related CNM were ruled out. By sequencing BIN1, we identified a heterozygous pathogenic mutation [c.107C > A (p.A36E)], and we demonstrate that the mutation strongly impairs the membrane tubulation property of the protein. One affected sister carried the same mutation. Her clinical examination and muscle MRI revealed a similar phenotype. Our findings expand the clinical and genetic spectrum of the autosomal dominant CNM associated with BIN1 mutations
The Virgin Mary on Screen: Mater Dei or Just a Mother in Guido Chiesa’s Io Sono con Te (I Am with You)
Guido Chiesa’s Io Sono con Te (I Am with You) offers a unique, albeit controversial take on Mary, the mother of Jesus. Filmed in Tunisia, and subject to criticism by Italian Catholic authorities and film critics alike, Io Sono con Te presents a rich anthropological-theological reflection on religion, culture, gender, and sacrifice. Not surprisingly, Chiesa draws on René Girard’s scapegoat theory throughout his film as he fashions Mary as the forceful protagonist in a familiar yet controversial story
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