12 research outputs found
A Case Report on the Spontaneous Intraperitoneal Rupture of Urinary Bladder Presenting as Acute Intestinal Obstruction – Lessons Learnt
Acute intestinal obstruction is a common surgical emergency. Most of the time, the cause lies in the gastrointestinal track. A 19 year old boy presented with clinical features of acute intestinal obstruction and radiological features suggestive of large bowel obstruction was taken up for surgery. During evaluation we found extravasation of urine inside pelvic cavity. Exploratory laparotomy showed intraperitoneal rent in dome of urinary bladder with dense adhesion of omentum kinking the transverse colon causing acute intestinal obstruction. We were surprised to see the resolution of obstruction with excision of omental band. The bladder was repaired and he was relieved of the problem. This article is a rare example of nongastrointestinal cause for intestinal obstruction. Most of these cases are seen by a general surgeon in an emergency setting. Hence this report is to enlighten the medical caregivers about the existence of this rare entity
Radio Continuum and HI study of Blue Compact Dwarf Galaxies
The multifrequency radio continuum and 21cm HI observations of five blue
compact dwarf (BCD) galaxies, Mrk 104, Mrk 108, Mrk 1039, Mrk 1069 and I Zw 97
using the Giant Meterwave Radio Telescope (GMRT) are presented here. Radio
continuum emission at 610 MHz and 325 MHz is detected from all the observed
galaxies whereas only a few are detected at 240 MHz. In our sample, three
galaxies are members of groups and two galaxies (Mrk 1069 and I Zw 97) are
isolated galaxies. The radio emission from Mrk 104 and Mrk 108 is seen to
encompass the entire optical galaxy whereas the radio emission from Mrk 1039,
Mrk 1069, I Zw 97 is confined to massive HII regions. This, we suggest,
indicates that the star formation in the latter group of galaxies has recently
been triggered and that the environment in which the galaxy is evolving plays a
role. Star formation rates (SFR) calculated from 610 MHz emission is in the
range 0.01-0.1 M_sun/yr; this is similar to the SFR obtained for individual
star forming regions in BCDs. The integrated radio spectra of four galaxies are
modelled over the frequency range where data is available. We find that two of
the galaxies Mrk 1069 and Mrk 1039, show a turnover at low frequencies which is
well fitted by free-free absorption whereas the other two galaxies, Mrk 104 and
Mrk 108, show a power law at the lowest GMRT frequencies. The flatter spectrum,
localized star formation and radio continuum in isolated galaxies lend support
to stochastic self-propagating star formation (SSPSF). The HI observations of
four galaxies Mrk 104, Mrk 108, Mrk 1039 and Mrk 1069 show extended disks as
large as ~1.1-6 times the optical size. All the observed BCDs (except Mrk 104)
show rotating disk with a half power width of ~50-124 km/s. Solid body rotation
is common in our sample. We note that the tidal dwarf (TD) origin is possible
for two of the BCDs in our sample.Comment: 39 pages, 8 figures, 38 sub-figures. Accepted for publication in Ap
GMRT Observations of the 2006 outburst of the Nova RS Ophiuchi: First detection of emission at radio frequencies < 1.4 GHz
The first low radio frequency (<1.4 GHz) detection of the outburst of the
recurrent nova RS Ophiuchi is presented in this letter. Radio emission was
detected at 0.61 GHz on day 20 with a flux density of ~48 mJy and at 0.325 GHz
on day 38 with a flux density of ~ 44 mJy. This is in contrast with the 1985
outburst when it was not detected at 0.327 GHz even on day 66. The emission at
low radio frequencies is clearly non-thermal and is well-explained by a
synchrotron spectrum of index alpha ~ -0.8 (S propto nu^alpha) suffering
foreground absorption due to the pre-existing, ionized, warm, clumpy red giant
wind. The absence of low frequency radio emission in 1985 and the earlier
turn-on of the radio flux in the current outburst are interpreted as being due
to higher foreground absorption in 1985 compared to that in 2006, suggesting
that the overlying wind densities in 2006 are only ~30% of those in 1985.Comment: 14 pages, 1 figure. Accepted for publication in ApJ
A multiwavelength study of the massive star forming region IRAS 06055+2039 (RAFGL 5179)
We present a multiwavelength study of the massive star forming region
associated with IRAS 06055+2039 which reveals an interesting scenario of this
complex where regions are at different stages of evolution of star formation.
Narrow band near-infrared (NIR) observations were carried out with UKIRT-UFTI
in molecular hydrogen and Br lines to trace the shocked and ionized
gases respectively. We have used 2MASS data to study the nature of
the embedded cluster associated with IRAS 06055+2039. We obtain a power-law
slope of 0.430.09 for the -band Luminosity Function (KLF) which is
in good agreement with other young embedded clusters. We estimate an age of 2
-- 3 Myr for this cluster. The radio emission from the ionized gas has been
mapped at 610 and 1280 MHz using the Giant Metrewave Radio Telescope (GMRT),
India. Apart from the diffuse emission, the high resolution 1280 MHz map also
shows the presence of several discrete sources which possibly represent high
density clumps. The morphology of shocked molecular hydrogen forms an arc
towards the N-E of the central IRAS point source and envelopes the radio
emission. Submillimetre emission using JCMT-SCUBA show the presence of a dense
cloud core which is probably at an earlier evolutionary stage compared to the
ionized region with shocked molecular gas lying in between the two. Emission
from warm dust and the Unidentified Infrared Bands (UIBs) have been estimated
using the mid-infrared (8 -- 21 m) data from the MSX survey. From the
submillimetre emission at 450 and 850 m the total mass of the cloud is
estimated to be 7000 -- 9000 .Comment: Accepted for publication in A &
A bibliography of parasites and diseases of marine and freshwater fishes of India
With the increasing demand for fish as human food, aquaculture both in freshwater
and salt water is rapidly developing over the world. In the developing countries,
fishes are being raised as food. In many countries fish farming is a very important
economic activity. The most recent branch, mariculture, has shown advances in
raising fishes in brackish, estuarine and bay waters, in which marine, anadromous and
catadromous fishes have successfully been grown and maintained