Primary extracranial meningioma of the mandible

Meningiomas are benign tumors of mesodermal origin that arise from arachnoid cell clusters that penetrate the dura to form arachnoid villi. These neoplasms represent one of the most common neoplasms developing within the central nervous system and are usually located at points of entry of vessels and nerves through the dura. Extracranial meningiomas (EM) comprise only 2% of all meningiomas, and only six cases of primary EM of the jawbones have been described to date. They may arise as an extension of intracranial meningiomas or as primary tumors and may be clinically indistinguishable from other benign tumours of the jaws, as they usually present as a welldelineated unencapsulated tumors. In this article a case of primary intramandibular primary EM that appeared as a well-defined osteolytic radiolucent lesion of the jaw is reported. The salient clinico-pathological features of this case is compared to those previously reported in the literature and differential diagnosis and therapeutic considerations are discussed

Effect of Chitosan Edible Coating on the Biochemical and Physical Characteristics of Carp Fillet (Cyprinus carpio) Stored at −18ºC.

The effect of an edible coating (EC) with 1.5% chitosan as an additive, on common carp (Cyprinus carpio) fillet, was determined evaluating the biochemical, physicochemical, textural, microbiological, and nutritional characteristics periodically during its hydroperoxides content (HPC) (0.8324 nM hydroperoxides/mg of protein versus 0.5540 nM/mg with regard to the EC sample), as well as protein carbonyl content (PCC) (0.5860 nM versus 0.4743 nM of reactive carbonyl groups/mg of protein of noncoated material), keeping properties for a longer period of time, and a lower protein solubility (7.8 mg of supernatant protein/mg of total microbialgrowth,thecountwas2.2×10 CFU/gofsampleinmesophilesversus4.7×10 intheECsample.Theresultsindicatethat the use of EC added with chitosan maintains the quality of the product regarding lipid and protein oxidation until fourth month of storage, maintaining moisture content without variation for at least 3 months, and inhibits microbial growth up to 2 logarithmic units, during five months of frozen storage

Vejez y vulnerabilidad. Retratos de casos y perfiles de estudio en contextos diversos: grandes regiones, localidades rurales y territorios migrantes

México está inmerso en una acelerada transición demográfica, es el séptimo lugar entre los países con envejecimiento acelerado en Latinoamérica, con 9.7% de adultos mayores de 60 años (CONAPO, 2013). La investigación en nuestro país en torno a los sectores envejecidos tiene ya más de un cuarto de siglo, y ha contribuido al desarrollo de los estudios sobre este grupo de la población bajo las tendencias no sólo locales y regionales, sino también internacionales; respondiendo a las necesidades sociales que se modifican a través de la historia.Desde el área de especialización de cada autor, se pone particular atención en las condiciones de la vida cotidiana y las estrategias que se generan para enfrentar y reducir la vulnerabilidad, así como en los retos que se afrontarán por e l tendiente proceso de envejecimiento de la población, principalmente en los ámbitos socioculturales y de salud.Universidad Autónoma del Estado de Méxic

Sleep and brain morphological changes in the eighth decade of life

Objective: Sleep is important for brain health. We analysed associations between usual sleep habits and MRI markers of neurodegeneration (brain atrophy), vascular damage (white matter hyperintensities, WMH) and waste clearance (perivascular spaces, PVS) in older community-dwelling adults. Method: We collected self-reported usual sleep duration, quality and medical histories from the Lothian Birth Cohort 1936 (LBC1936) age 76 years and performed brain MRI. We calculated sleep efficiency, measured WMH and brain volumes, quantified PVS, and assessed associations between sleep measures and brain markers in multivariate models adjusted for demographic and medical history variables. Results: In 457 subjects (53% males, mean age 76±0.65 years), we found: brain and white matter loss with increased weekend daytime sleep (β=-0.114, P=0.03; β=-0.122, P=0.007 respectively), white matter loss with less efficient sleep (β=0.132, P=0.011) and PVS increased with interrupted sleep (OR 1.84 95% CI, P=0.025). Conclusion: Cross-sectional associations of sleep parameters with brain atrophy and more PVS suggest adverse relationships between usual sleep habits and brain health in older people that should be evaluated longitudinally

Constraints on the χ_(c1) versus χ_(c2) polarizations in proton-proton collisions at √s = 8 TeV

The polarizations of promptly produced χ_(c1) and χ_(c2) mesons are studied using data collected by the CMS experiment at the LHC, in proton-proton collisions at √s=8  TeV. The χ_c states are reconstructed via their radiative decays χ_c → J/ψγ, with the photons being measured through conversions to e⁺e⁻, which allows the two states to be well resolved. The polarizations are measured in the helicity frame, through the analysis of the χ_(c2) to χ_(c1) yield ratio as a function of the polar or azimuthal angle of the positive muon emitted in the J/ψ → μ⁺μ⁻ decay, in three bins of J/ψ transverse momentum. While no differences are seen between the two states in terms of azimuthal decay angle distributions, they are observed to have significantly different polar anisotropies. The measurement favors a scenario where at least one of the two states is strongly polarized along the helicity quantization axis, in agreement with nonrelativistic quantum chromodynamics predictions. This is the first measurement of significantly polarized quarkonia produced at high transverse momentum