221 research outputs found
SDSSJ143244.91+301435.3 at VLBI: a compact radio galaxy in a narrow-line Seyfert 1
We present VLBI observations, carried out with the European Very Long
Baseline Interferometry Network (EVN), of SDSSJ143244.91+301435.3, a radio-loud
narrow-line Seyfert 1 (RLNLS1) characterized by a steep radio spectrum. The
source, compact at Very Large Array (VLA) resolution, is resolved on the
milliarcsec scale, showing a central region plus two extended structures. The
relatively high brightness temperature of all components (5x10^6-1.3x10^8 K)
supports the hypothesis that the radio emission is non-thermal and likely
produced by a relativistic jet and/or small radio lobes. The observed radio
morphology, the lack of a significant core and the presence of a low frequency
(230 MHz) spectral turnover are reminiscent of the Compact Steep Spectrum
sources (CSS). However, the linear size of the source (~0.5kpc) measured from
the EVN map is lower than the value predicted using the turnover/size relation
valid for CSS sources (~6kpc). This discrepancy can be explained by an
additional component not detected in our observations, accounting for about a
quarter of the total source flux density, combined to projection effects. The
low core-dominance of the source (CD<0.29) confirms that
SDSSJ143244.91+301435.3 is not a blazar, i.e. the relativistic jet is not
pointing towards the observer. This supports the idea that
SDSSJ143244.91+301435.3 may belong to the "parent population" of flat-spectrum
RLNLS1 and favours the hypothesis of a direct link between RLNLS1 and compact,
possibly young, radio galaxies.Comment: 8 pages, 3 figures, accepted for publication in MNRA
A new class of stem cells in South Africa: iPS cells
Created from adult rather than embryonic cells, induced pluripotent stem (iPS) cells represent a breakthrough in stem cell science, and their pioneers have been recognised with the 2012 Nobel Prize in Medicine. These cells offer new hope in the treatment of pathogenetic diseases, but there is still a way to go on the road to effective therapeutic applications
Intake and Digestibility of Cattle's Ration on Complete Feed Based-On Fermented Ammonization Rice Straw with Different Protein Level
Complete feed (CF) utilization is expected to have impact on higher productivity due to increased intake and digestibility. The objective of research was to evaluate the effects of different level protein of CF based-on fermented ammonization (amofer) rice straw to Simmental offspring intake and digestibility Twenty males Simmental offspring with average live weight 372.15± 26.64 kg (coefficient of variance 7.16%) were used in this study. Feed treatment consisted of BC Nutrifeed 132 concentrate as control feed (T0) and CF based-on amofer rice straw consisted of T1, T2, T3 and T4 which had crude protein content 11, 12, 13 and 14% respectively and also total digestible nutrients (TDN) ± 62%. Completely randomized design with five treatments and four replicates were designed for this research. Data was analyzed by analysis of variance (ANOVA) at 95% significance level. The results showed that different crude protein did not affect the intake of dry matter, organic matter, crude protein and TDN. It was significantly affected the digestibility of dry matter, organic matter and crude protein (p<0.01). The highest digestibility was obtained to treatment with 12% crude protein and ± 62% TDN. Conclusion of this study was different level of crude protein constituted in CF which produced from specific material resource was proven to have impact in increasing cattle's digestibility.Doi: 10.12777/ijse.4.2.2013.86-91 [How to cite this article: Mayulu, H., Sunarso, S., Christiyanto, M. and Ballo, F. (2013). Intake and Digestibility of Cattle's Ration On Complete Feed Based-On Fermented Ammonization Rice Straw With Different Protein Level. International Journal of Science and Engineering, 4(2),86-91. Doi: 10.12777/ijse.4.2.2013.86-91
SDSSJ143244.91+301435.3: a link between radio-loud narrow-line Seyfert 1 galaxies and compact steep-spectrum radio sources?
We present SDSSJ143244.91+301435.3, a new case of radio-loud narrow line
Seyfert 1 (RL NLS1) with a relatively high radio power (P1.4GHz=2.1x10^25 W
Hz^-1) and large radioloudness parameter (R1.4=600+/-100). The radio source is
compact with a linear size below ~1.4 kpc but, contrary to most of the RL NLS1
discovered so far with such a high R1.4, its radio spectrum is very steep
(alpha=0.93) and not supporting a 'blazar-like' nature. Both the small mass of
the central super-massive black-hole and the high accretion rate relative to
the Eddington limit estimated for this object (3.2x10^7 Msun and 0.27,
respectively, with a formal error of ~0.4 dex on both quantities) are typical
of the class of NLS1. Through a modeling of the spectral energy distribution of
the source we have found that the galaxy hosting SDSSJ143244.91+301435.3 is
undergoing a quite intense star-formation (SFR=50 Msun y^-1) which, however, is
expected to contribute only marginally (~1 per cent) to the observed radio
emission. The radio properties of SDSSJ143244.91+301435.3 are remarkably
similar to those of compact steep spectrum (CSS) radio sources, a class of AGN
mostly composed by young radio galaxies. This may suggest a direct link between
these two classes of AGN, with the CSS sources possibly representing the
misaligned version (the so-called parent population) of RL NLS1 showing blazar
characteristics.Comment: 14 pages, 7 figures, 4 tables, accepted for publication in MNRA
Time-course of left ventricle function during mild therapeutic hypothermia in out-of-hospital cardiac arrest patients
Peer reviewe
On the nuclear obscuration of H2O maser galaxies
To shed light onto the circumnuclear environment of 22 GHz H2O maser
galaxies, we have analyzed some of their multi-wavelength properties, including
the far infrared luminosity (FIR), the luminosity of the [O III]\lambda5007
emission line, the nuclear X-ray luminosity, and the equivalent width of the
neutral iron Ka emission line (EW (Ka)). Our statistical analysis includes a
total of 85 sources, most of them harboring an active galactic nucleus (AGN).
There are strong anti-correlations between EW (Ka) and two "optical thickness
parameters", i.e. the ratios of the X-ray luminosity versus the presumably more
isotropically radiated [O III] and far infrared (FIR) luminosities. Based on
these anti-correlations, a set of quantitative criteria, EW (Ka) > 300eV,
L_{2-10keV} 600L_{2-10keV} can be established for
Compton-thick nuclear regions. 18 H2O maser galaxies belong to this category.
There are no obvious correlations between the EW (Ka), the [O III] luminosity
and the isotropic H2O maser luminosity. When comparing samples of Seyfert 2s
with and without detected H2O maser lines, there seem to exist differences in
EW (Ka) and the fraction of Compton-thick nuclei. This should be studied
further. For AGN masers alone, there is no obvious correlation between FIR and
H2O maser luminosities. However, including masers associated with star forming
regions, a linear correlation is revealed. Overall, the extragalactic FIR-H2O
data agree with the corresponding relation for Galactic maser sources,
extrapolated by several orders of magnitude to higher luminosities.Comment: 32 pages with 5 figures and 2 tables, accepted for publication in Ap
Adjuvant radiation therapy in metastatic lymph nodes from melanoma
<p>Abstract</p> <p>Purpose</p> <p>To analyze the outcome after adjuvant radiation therapy with standard fractionation regimen in metastatic lymph nodes (LN) from cutaneous melanoma.</p> <p>Patients and methods</p> <p>86 successive patients (57 men) were treated for locally advanced melanoma in our institution. 60 patients (69%) underwent LN dissection followed by radiation therapy (RT), while 26 patients (31%) had no radiotherapy.</p> <p>Results</p> <p>The median number of resected LN was 12 (1 to 36) with 2 metastases (1 to 28). Median survival after the first relapse was 31.8 months. Extracapsular extension was a significant prognostic factor for regional control (p = 0.019). Median total dose was 50 Gy (30 to 70 Gy). A standard fractionation regimen was used (2 Gy/fraction). Median number of fractions was 25 (10 to 44 fractions). Patients were treated with five fractions/week. Patients with extracapsular extension treated with surgery followed by RT (total dose ≥50 Gy) had a better regional control than patients treated by surgery followed by RT with a total dose <50 Gy (80% vs. 35% at 5-year follow-up; p = 0.004).</p> <p>Conclusion</p> <p>Adjuvant radiotherapy was able to increase regional control in targeted sub-population (LN with extracapsular extension).</p
Swift detection of all previously undetected blazars in a micro-wave flux-limited sample of WMAP foreground sources
Almost the totality of the bright foreground sources in the WMAP CMB maps are
blazars, a class of sources that show usually also X-ray emission. However, 23
objects in a flux-limited sample of 140 blazars of the WMAP catalog (first
year) were never reported before as X-ray sources. We present here the results
of 41 Swift observations which led to the detection of all these 23 blazars in
the 0.3-10 keV band. We conclude that all micro-wave selected blazars are X-ray
emitters and that the distribution of the micro-wave to X-ray spectral slope
of LBL blazars is very narrow, confirming that the X-ray flux
of most blazars is a very good estimator of their micro-wave emission. The
X-ray spectral shape of all the objects that were observed long enough to allow
spectral analysis is flat and consistent with inverse Compton emission within
the commonly accepted view where the radiation from blazars is emitted in a
Sychrotron-Inverse-Compton scenario. We predict that all blazars and most radio
galaxies above the sensitivity limit of the WMAP and of the Planck CMB missions
are X-ray sources detectable by the present generation of X-ray satellites. An
hypothetical all-sky soft X-ray survey with sensitivity of approximately
erg/s would be crucial to locate and remove over 100,000 blazars
from CMB temperature and polarization maps and therefore accurately clean the
primordial CMB signal from the largest population of extragalactic foreground
contaminants.Comment: 13 pages, 4 figures, 5 tables, A&A in pres
Successful treatment of desmoid tumor of the chest wall with tranilast: a case report
<p>Abstract</p> <p>Introduction</p> <p>Desmoid tumor is characterized by infiltrative growth and local recurrence often occurs after surgery. To reduce the local recurrence rate, adjuvant therapy, such as radiotherapy and pharmacotherapy with cytotoxic agents, anti-estrogen agents and non-steroidal anti-inflammatory drugs, is often applied. In addition, these non-surgical treatments are also performed in patients with unresectable desmoid tumors. We successfully treated a patient with a desmoid tumor with tranilast; an anti-allergic agent.</p> <p>Case presentation</p> <p>A 48-year-old Japanese man with a slow-growing desmoid tumor on his chest wall was treated with an oral administration of tranilast (300 mg per day, three times a day). Two years and two months after the commencement of his therapy, the tumor became impalpable. At this time, the oral administration of tranilast was discontinued. Two years after discontinuation of the treatment, a physical examination showed no recurrence of the tumor and he continued in a state of remission. We were successfully able to reduce the size of the tumor and thereafter maintain the reduced size.</p> <p>Conclusion</p> <p>Tranilast was clinically effective in our case, and is probably comparable to cytotoxic agents or anti-estrogen agents. Because tranilast has substantially fewer adverse effects than cytotoxic agents, it could be a very useful therapeutic agent for desmoid tumor.</p
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