74 research outputs found
Technological and nutritional aspects of gluten-free pasta based on chickpea flour and tiger nut flour
[EN] Gluten-free (GF) dry egg pappardelle was prepared with tigernut flour (50%), chickpea flour (50%) and pregelatinized TNF (0, 5, 10%), and compared to plain pasta (100% durum wheat semolina). The GF pasta may have a significant higher content of insoluble fibre, minerals and fat rich in oleic acid and a similar protein content. It was not found any clear relationship between the flour functional properties and its proximate composition. The use of PG did not imply an improvement on the firmness but did provide some continuity to the pasta structure.MartÃn-Esparza, M.; Bressi, GB.; Raga, A.; Albors, A. (2018). Technological and nutritional aspects of gluten-free pasta based on chickpea flour and tiger nut flour. En IDS 2018. 21st International Drying Symposium Proceedings. Editorial Universitat Politècnica de València. 1-25. https://doi.org/10.4995/IDS2018.2018.7760OCS12
Modelling the strongest silicate emission features of local type 1 AGN
We measure the 10 and m silicate features in a sample of 67 local
() type 1 active galactic nuclei (AGN) with available {\it Spitzer}
spectra dominated by non-stellar processes. We find that the m silicate
feature peaks at m with a strength (Si = ln
f(spectrum)/f(continuum)) of , while the
m one peaks at m with a strength of
. We select from this sample sources with the strongest
10m silicate strength (, 10 objects). We carry
out a detailed modeling of the IRS/{\it Spitzer} spectra by comparing several
models that assume different geometries and dust composition: a smooth torus
model, two clumpy torus models, a two-phase medium torus model, and a
disk+outflow clumpy model. We find that the silicate features are well modeled
by the clumpy model of Nenkova et al. 2008, and among all models those
including outflows and complex dust composition are the best (Hoenig et al.
2017). We note that even in AGN-dominated galaxies it is usually necessary to
add stellar contributions to reproduce the emission at the shortest
wavelengths.Comment: Accepted for publication in Ap
The Galaxy Activity, Torus, and Outflow Survey (GATOS). III: Revealing the inner icy structure in local AGN
We use JWST/MIRI MRS spectroscopy of a sample of six local obscured type
1.9/2 active galactic nuclei (AGN) to compare their nuclear mid-IR absorption
bands with the level of nuclear obscuration traced by X-rays. This study is the
first to use sub-arcsecond angular resolution data of local obscured AGN to
investigate the nuclear mid-IR absorption bands with a wide wavelength coverage
(4.9-28.1 m). All the nuclei show the 9.7 m silicate band in
absorption. We compare the strength of the 9.7 and 18 m silicate features
with torus model predictions. The observed silicate features are generally well
explained by clumpy and smooth torus models. We report the detection of the 6
m dirty water ice band (i.e., a mix of water and other molecules such as
CO and CO) at sub-arcsecond scales (0.26 arcsec at 6 m; inner
50 pc) in a sample of local AGN with different levels of nuclear
obscuration in the range log N(cm). We
find a good correlation between the 6 m water ice optical depths and
N. This result indicates that the water ice absorption
might be a reliable tracer of the nuclear intrinsic obscuration in AGN. The
weak water ice absorption in less obscured AGN (log N
(cm)23.0 cm) might be related to the hotter dust
temperature (T110 K) expected to be reached in the outer
layers of the torus due to their more inhomogeneous medium. Our results suggest
it might be necessary to include the molecular content, such as, HO,
aliphatic hydrocarbons (CH-) and more complex PAH molecules in torus models to
better constrain key parameters such as the torus covering factor (i.e. nuclear
obscuration).Comment: Accepted for publication in A&A. 13 pages, 12 Figure
The Galaxy Activity, Torus, and Outflow Survey (GATOS): III. Revealing the inner icy structure in local active galactic nuclei
We use JWST/MIRI MRS spectroscopy of a sample of six local obscured type 1.9/2 active galactic nuclei (AGN) to compare their nuclear mid-IR absorption bands with the level of nuclear obscuration traced by X-rays. This study is the first to use subarcsecond angular resolution data of local obscured AGN to investigate the nuclear mid-IR absorption bands with a wide wavelength coverage (4.9–28.1 μm). All the nuclei show the 9.7 μm silicate band in absorption. We compare the strength of the 9.7 and 18 μm silicate features with torus model predictions. The observed silicate features are generally well explained by clumpy and smooth torus models. We report the detection of the 6 μm dirty water ice band (i.e., a mix of water and other molecules such as CO and CO2) at subarcsecond scales (∼0.26″ at 6 μm; inner ∼50 pc) in a sample of local AGN with different levels of nuclear obscuration in the range log NHX-Ray (cm−2)∼22 − 25. We find good correlation between the 6 μm water ice optical depths and NHX-Ray. This result indicates that the water ice absorption might be a reliable tracer of the nuclear intrinsic obscuration in AGN. The weak water ice absorption in less obscured AGN (log NHX-ray (cm−2)≲23.0 cm−2) might be related to the hotter dust temperature (> TsubH2O ∼ 110 K) expected to be reached in the outer layers of the torus due to their more inhomogeneous medium. Our results suggest it might be necessary to include the molecular content, such as H2O, aliphatic hydrocarbons (CH−), and more complex polycyclic aromatic hydrocarbon (PAH) molecules, in torus models to better constrain key parameters such as the torus covering factor (i.e., nuclear obscuration)
Confirmation of an He I evaporating atmosphere around the 650-Myr-old sub-Neptune HD235088 b (TOI-1430 b) with CARMENES
HD235088 (TOI-1430) is a young star known to host a sub-Neptune-sized planet
candidate. We validated the planetary nature of HD235088 b with multiband
photometry, refined its planetary parameters, and obtained a new age estimate
of the host star, placing it at 600-800 Myr. Previous spectroscopic
observations of a single transit detected an excess absorption of He I
coincident in time with the planet candidate transit. Here, we confirm the
presence of He I in the atmosphere of HD235088 b with one transit observed with
CARMENES. We also detected hints of variability in the strength of the helium
signal, with an absorption of 0.910.11%, which is slightly deeper
(2) than the previous measurement. Furthermore, we simulated the He I
signal with a spherically symmetric 1D hydrodynamic model, finding that the
upper atmosphere of HD235088 b escapes hydrodynamically with a significant mass
loss rate of (1.5-5) 10g s, in a relatively cold outflow,
with =3125375 K, in the photon-limited escape regime. HD235088 b
( = 2.0450.075 R) is the smallest planet found to date
with a solid atmospheric detection - not just of He I but any other atom or
molecule. This positions it a benchmark planet for further analyses of evolving
young sub-Neptune atmospheres.Comment: Accepted for publication in A&A. 17 pages, 18 figure
Risk factors for non-diabetic renal disease in diabetic patients
Background. Diabetic patients with kidney disease have a high prevalence of non-diabetic renal disease (NDRD). Renal and
patient survival regarding the diagnosis of diabetic nephropathy (DN) or NDRD have not been widely studied. The aim of
our study is to evaluate the prevalence of NDRD in patients with diabetes and to determine the capacity of clinical and
analytical data in the prediction of NDRD. In addition, we will study renal and patient prognosis according to the renal
biopsy findings in patients with diabetes.
Methods. Retrospective multicentre observational study of renal biopsies performed in patients with diabetes from 2002 to
2014.
Results. In total, 832 patients were included: 621 men (74.6%), mean age of 61.7 6 12.8 years, creatinine was 2.8 6 2.2 mg/dL
and proteinuria 2.7 (interquartile range: 1.2–5.4) g/24 h. About 39.5% (n ¼ 329) of patients had DN, 49.6% (n ¼ 413) NDRD and
10.8% (n ¼ 90) mixed forms. The most frequent NDRD was nephroangiosclerosis (NAS) (n ¼ 87, 9.3%). In the multivariate
logistic regression analysis, older age [odds ratio (OR) ¼ 1.03, 95% CI: 1.02–1.05, P < 0.001], microhaematuria (OR ¼ 1.51, 95%
CI: 1.03–2.21, P ¼ 0.033) and absence of diabetic retinopathy (DR) (OR ¼ 0.28, 95% CI: 0.19–0.42, P < 0.001) were independently
associated with NDRD. Kaplan–Meier analysis showed that patients with DN or mixed forms presented worse renal
prognosis than NDRD (P < 0.001) and higher mortality (P ¼ 0.029). In multivariate Cox analyses, older age (P < 0.001), higher
serum creatinine (P < 0.001), higher proteinuria (P < 0.001), DR (P ¼ 0.007) and DN (P < 0.001) were independent risk factors for
renal replacement therapy. In addition, older age (P < 0.001), peripheral vascular disease (P ¼ 0.002), higher creatinine
(P ¼ 0.01) and DN (P ¼ 0.015) were independent risk factors for mortality.
Conclusions. The most frequent cause of NDRD is NAS. Elderly patients with microhaematuria and the absence of DR are
the ones at risk for NDRD. Patients with DN presented worse renal prognosis and higher mortality than those with NDRD.
These results suggest that in some patients with diabetes, kidney biopsy may be useful for an accurate renal diagnosis and
subsequently treatment and prognosis
Absence of nuclear polycyclic aromatic hydrocarbon emission from a compact starburst: the case of the type-2 quasar Mrk 477
Mrk 477 is the closest type-2 quasar, at a distance of 163 Mpc. This makes it an ideal laboratory for studying the interplay between nuclear activity and star formation with a great level of detail and signal-to-noise. In this Letter we present new mid-infrared (mid-IR) imaging and spectroscopic data with an angular resolution of 0.4″ (∼300 pc) obtained with the Gran Telescopio Canarias instrument CanariCam. The N-band (8–13 μm) spectrum of the central ∼400 pc of the galaxy reveals [S IV]λ10.51 μm emission, but no 8.6 or 11.3 μm polycyclic aromatic hydrocarbon (PAH) features, which are commonly used as tracers of recent star formation. This is in stark contrast with the presence of a nuclear starburst of ∼300 pc in size, an age of 6 Myr, and a mass of 1.1×108 M⊙, as constrained from ultraviolet Hubble Space Telescope observations. Considering this, we argue that even the more resilient, neutral molecules that mainly produce the 11.3 μm PAH band are most likely being destroyed in the vicinity of the active nucleus despite the relatively large X-ray column density, log NH = 23.5 cm−2, and modest X-ray luminosity, 1.5×1043 erg s−1. This highlights the importance of being cautious when using PAH features as star formation tracers in the central region of galaxies to evaluate the impact of feedback from active galactic nuclei
- …