290 research outputs found
Imaging ellipsometry of graphene
Imaging ellipsometry studies of graphene on SiO2/Si and crystalline GaAs are
presented. We demonstrate that imaging ellipsometry is a powerful tool to
detect and characterize graphene on any flat substrate. Variable angle
spectroscopic ellipsometry is used to explore the dispersion of the optical
constants of graphene in the visible range with high lateral resolution. In
this way the influence of the substrate on graphene's optical properties can be
investigatedComment: 3 pages, 3 figure
SysZNF: the C2H2 zinc finger gene database
C2H2 zinc finger (C2H2-ZNF) genes are one of the largest and most complex gene super-families in metazoan genomes, with hundreds of members in the human and mouse genome. The ongoing investigation of this huge gene family requires computational support to catalog genotype phenotype comparisons of C2H2-ZNF genes between related species and finally to extend the worldwide knowledge on the evolution of C2H2-ZNF genes in general. Here, we systematically collected all the C2H2-ZNF genes in the human and mouse genome and constructed a database named SysZNF to deposit available datasets related to these genes. In the database, each C2H2-ZNF gene entry consists of physical location, gene model (including different transcript forms), Affymetrix gene expression probes, protein domain structures, homologs (and synteny between human and mouse), PubMed references as well as links to relevant public databases. The clustered organization of the C2H2-ZNF genes is highlighted. The database can be searched using text strings or sequence information. The data are also available for batch download from the web site. Moreover, the graphical gene model/protein view system, sequence retrieval system and some other tools embedded in SysZNF facilitate the research on the C2H2 type ZNF genes under an integrative view. The database can be accessed from the URL http://epgd.biosino.org/SysZNF
Adenocarcinoma pancreático acinar, em cão
O artigo não apresenta resumo
Associação de implante metálico e implante intramedular de polímero de mamona (Ricinus comunis) na estabilização de fratura cominutiva em fêmur de guaxinim (Procyon cancrivorus)
O artigo não apresenta resumo
Persistent anthrax as a major driver of wildlife mortality in a tropical rainforest
Anthrax is a globally important animal disease and zoonosis. Despite this, our current knowledge of anthrax ecology is largely limited to arid ecosystems, where outbreaks are most commonly reported. Here we show that the dynamics of an anthrax-causing agent, Bacillus cereus biovar anthracis, in a tropical rainforest have severe consequences for local wildlife communities. Using data and samples collected over three decades, we show that rainforest anthrax is a persistent and widespread cause of death for a broad range of mammalian hosts. We predict that this pathogen will accelerate the decline and possibly result in the extirpation of local chimpanzee (Pan troglodytes verus) populations. We present the epidemiology of a cryptic pathogen and show that its presence has important implications for conservation
A Large Hadron Electron Collider at CERN
This document provides a brief overview of the recently published report on
the design of the Large Hadron Electron Collider (LHeC), which comprises its
physics programme, accelerator physics, technology and main detector concepts.
The LHeC exploits and develops challenging, though principally existing,
accelerator and detector technologies. This summary is complemented by brief
illustrations of some of the highlights of the physics programme, which relies
on a vastly extended kinematic range, luminosity and unprecedented precision in
deep inelastic scattering. Illustrations are provided regarding high precision
QCD, new physics (Higgs, SUSY) and electron-ion physics. The LHeC is designed
to run synchronously with the LHC in the twenties and to achieve an integrated
luminosity of O(100) fb. It will become the cleanest high resolution
microscope of mankind and will substantially extend as well as complement the
investigation of the physics of the TeV energy scale, which has been enabled by
the LHC
Bilateral paediatric cataract surgery - outcomes of 298 children from Kinshasa, the Democratic Republic of the Congo
Introduction: The leading cause of childhood blindness globally is
paediatric cataract. Bilateral cataract surgery can help to improve
visual performance and to diminish the burden of childhood blindness.
Objective: To report in a retrospective observational cohort study the
long-term outcomes of 298 children who had bilateral cataract surgery
with IOL implantation from 2001-2016 in Kinshasa. Methods: A
standardized surgical treatment of paediatric cataract was practiced on
298 children. Patient\u2019s follow-up, complications, and visual
outcomes were recorded and analysed. Results: The mean age was 5.7
\ub1 4.3 years and males were predominant (64.9%). Most of children
were living mainly in urban poorest areas (96.3%). Strabismus,
nystagmus and microcornea were encountered in 20.1%, 25.1% and 8.7% of
children, respectively. Using WHO criteria most of patients were
classified as blind preoperatively and 81.9% of them had improved
visual outcomes after surgery. Main reasons for reduced vision during
follow-up were secondary cataract (5.7%), IOL decentration (1.2%),
retinal detachment (1.2%), and secondary glaucoma (1.5%). Conclusion:
In spite of the post conflict challenges, elimination of cataract
blindness in children remains a priority. Children present at a late
age for surgery and long term follow-up is poor. There is need for
program strengthening in these areas
[cerebral Hemometabolism: Variability In The Acute Phase Of Traumatic Coma].
to evaluate the interrelationships between cerebral and systemic hemometabolic alterations in patients with severe traumatic brain injury managed according to a standardized therapeutic protocol. prospective, interventional study in patients with traumatic coma. a general Intensive Care Unit in a teaching hospital. twenty-seven patients (21M e 6F), aging 14 - 58 years, with severe acute brain trauma, presenting with three to eight points on the Glasgow Coma Scale, were prospectively evaluated according to a cumulative protocol for the management of acute intracranial hypertension, where intracranial pressure (ICP) and cerebral extraction of oxygen (CEO2) were routinely measured. Hemometabolic interrelationships involving mean arterial pressure (MAP), ICP, arterial carbon dioxide tension (PaCO2), CEO2, cerebral perfusion pressure (CPP) and systemic extraction of oxygen (SEO2) were analyzed. routine therapeutic procedures. no correlation was found between CEO2 and CPP (r = -0.07; p = 0.41). There was a significant negative correlation between PaCO2 and CEO2 (r = -0.24; p = 0.005) and a positive correlation between SEO2 and CEO2 (r = 0.24; p = 0.01). The mortality rate in this group of patients was 25.9% (7/27). 1) CPP and CEO2 are unrelated; 2) CEO2 and PaCO2 are closely related; 3) during optimized hyperventilation, CEO2 and SEO2 are coupled.58877-8
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