787 research outputs found
Neurotensin localization in adenomatoid cystic malformation versus normal lung: Preliminary report of six consecutive cases
No full textNeuropeptides are considered a new class of neurotransmitters, several of which interact with the immune system as well as the macrophagic activity. Among these, neurotensin (NT) enhances the phagocitic response of macrophages and is the only neuropeptide that can enhance the cytolytic effects of activated macrophages. In this way, it may play a role as an inflammatory mediator. In order to investigate the possible relationship between NT and the defence mechanisms of the lung, we started to localize the presence of NT in pulmonary adenomatoid cystic malformation (CCAM). This series consists of 6 children affected by CCAM. In every case, at operation, we obtained specimens of both normal and pathological lung. Tissue sections from the pathological lung showed a significant increase of NT-like immunoreactivity in respect to sections of normal lung. NT influences and activates the macrophages, thus suggesting that it could represent a defence mechanism in children's lung activated in some malformative conditions. Finally, the increasing evidence of NT immunoreactivity in CCAM could explicate an in utero infectious pathogenesis of this malformation
Spectropolarimetry of superlumious supernovae: insight into their geometry
No full textWe present the first spectropolarimetric observations of a hydrogen-free superluminous supernova (SLSN) at z = 0.1136, namely SN 2015bn. The transient shows significant polarization at both of the observed epochs: one 24 days before maximum light in the rest-frame, and the other at 27 days after peak luminosity. Analysis of the Q - U plane suggests the presence of a dominant axis and no physical departure from the main axis at either epoch. The polarization spectrum along the dominant axis is characterized by a strong wavelength dependence and an increase in the signal from the first to the second epoch. We use a Monte Carlo code to demonstrate that these properties are consistent with a simple toy model that adopts an axisymmetric ellipsoidal configuration for the ejecta. We find that the wavelength dependence of the polarization is possibly due to a strong wavelength dependence in the line opacity, while the higher level of polarization at the second epoch is a consequence of the increase in the asphericity of the inner layers of the ejecta or the fact that the photosphere recedes into less spherical layers. The geometry of the SLSN is similar to that of stripped-envelope core-collapse SNe connected to GRB, while the overall evolution of the ejecta shape could be consistent with a central engine
INFLUENZA DELLA TROMBOSI NEOPLASTICA NEL TUMORE DI WILMS SULLA PROGNOSI DEI PAZIENTI AFFETTI
No full textNeurotensin activity in adenomatoid cystic malformation of the lung:preliminary report on six consecutive cases.
No full textLa concessione dell’imprimatur nel Regno di Napoli: il Registro della revisione delle opere (1774-1798)
No full textPratylenchus jaehni Inserra, Duncan, Troccoli, Dunn, Dos Santos, Kaplan & Vovlas 2001
No full text12. P. jaehni Inserra, Duncan, Troccoli, Dunn, Dos Santos, Kaplan & Vovlas 2001 ( Divsalar et al. 2011) 9 ♀: L= 470 (403–533) µm; a = 24.2 (22.8–26.6); b = 5.7 (5–6.5); b´ = 3.9 (3.2–4.4); c = 21.6 (16.8–23.8); c´ = 2.3 (1.8–3.3); St = 14.5 (14–15) µm; V = 79.4 (78.6–80.1) 4 ♂: L = 505 (500–510) µm; a = 28.8 (27–30.4); b = 5.7 (5.6–5.9); b' = 4 (3.9–4.1); c = 19 (18.7–20.4); c' = 2.5 (2.3–2.6); St = 14.5 (14–15) µm; Spicules = 17.3 (17–17.6) µm Associated plant and locality. Orange (Mazandaran). References. Divsalar et al. 2011 [F], 2012. Remarks. The Iranian population of P. jaehni (Divsalar et al. 2011) closely corresponds to the original description (Inserra et al. 2001). It is characterized by having a labial region with two annuli, lateral fields with four lines, longitudinal and interrupted striations present in central band, stylet≤ 15 µm, oval spermatheca filled with sperm, hemispherical tail with rounded terminus and precence of males. One slide collected from Mazandaran (Noshahr and Chalus city) was kindly sent by the authors and examined in present study. The Iranian population was determined to be close to P. l oo s i and P. coffeae. It differs from these two species by the length of the stylet and stylet knobs (less than 15 and 2.7 µm respectively vs more than 15 and 2.7 µm), V factor (less than 79 vs more than 79), shorter overlapping of oesophageal glands vs longer in others and tail terminus rounded vs smooth in P. coffeae and pointed in P. loosi.Published as part of Alvani, Somaye, Mahdikhani-Moghadam, Esmat, Rouhani, Hamid & Mohammadi, Abbas, 2016, A checklist of the family Pratylenchidae Thorne, 1949 from Iran, pp. 179-204 in Zootaxa 4079 (2) on page 187, DOI: 10.11646/zootaxa.4079.2.2, http://zenodo.org/record/105061
Observing intertidal coastal areas using full-polarimetric C- and X-band synthetic aperture radar measurements
No full textThis study is to analyze the multi-polarization/multi-frequency backscattering from intertidal areas using polarimetric Synthetic Aperture Radar (SAR) imagery collected by the C-band Radarsat-2 (RS2) and the X-band Cosmo-SkyMed Second Generation (CSG) satellite missions
A spatio-temporal variability assessment of the C33 iceberg using multi-polarisation C-band SAR satellite data
No full textIn this study, relevant features are extracted from multi-polarization Sentinel-1 synthetic aperture radar measurements and investigated to characterize the spatial pattern and the temporal evolution of the C33 iceberg formed on 7 April 2016 by partial collapsing of the Nansen Ice Shelf (Terra Nova Bay, Ross Sea, Antarctica). A time series consisting of four dual-polarimetric (HH+HV) C-band synthetic aperture radar measurements is collected from 9 April to 3 May 2016 and processed to extract the iceberg profile - according to an unsupervised state-of-the-art methodology - from three multi-polarization features, namely HH- and HV-polarized normalised radar cross-section and the product of HH- and HV-polarized scattering amplitudes. Once the edge of the C33 icberg is obtained, meaningful features as displacement, drift velocity and rotation are estimated to characterize its spatio-temporal variability.Results show that in such complex environment the HV-polarized NRCS performs best in extracting the iceberg profile and that the C33 iceberg drifted offshore for more than 65 km with an average velocity of about 3 km per day, experiencing non-negligible rotation and stabilizing its behavior over time
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