1,095 research outputs found
Adding value to cull cow beef
End of project reportThis project addressed the prospects of increasing the value of cull cow beef and examined the potential of a number of different management and dietary strategies. In Ireland, the national cow herd contributes 350,000 animals to total beef production annually, which represents 22% of all cattle slaughtered (DAF, 2007). A dominant feature of beef production in Ireland is the disposal of cows from the dairy and beef industries, the time of year at which culling occurs influences the number of cows available for slaughter. Suitability of a cow for slaughter is generally not a consideration for dairy or beef farmers
Magnetic Fields in Star-Forming Molecular Clouds I. The First Polarimetry of OMC-3 in Orion A
The first polarimetric images of the OMC-3 region of the Orion A filamentary
molecular cloud are presented. Using the JCMT, we have detected polarized
thermal emission at 850 microns from dust along a 6' length of the dense
filament. The polarization pattern is highly ordered and is aligned with the
filament throughout most of the region. The plane-of-sky magnetic field
direction is perpendicular to the measured polarization. The mean percentage
polarization is 4.2% with a 1 sigma dispersion of 1%. This region is part of
the integral-shaped filament, and active star formation is ongoing along its
length. The protostellar outflow directions do not appear to be consistently
correlated with the direction of the plane-of-sky field or the filament
structure itself. Depolarization toward the filament center, previously
detected in many other star-forming cores and protostars, is also evident in
our data. (abstract abridged)Comment: 9 pages plus 2 figures (1 colour); accepted for publication in the
March 10, 2000 issue (vol. 531 #2) of The Astrophysical Journa
From Capture to Sale
Based on exceptionally rich private papers of Portuguese slave traders, this study provides unique insight into the diet, health and medical care of slaves during their journey from Africa to Peru in the early seventeenth century.; Readership: All those interested in the history of the slave trade and slavery in both Africa and Spanish America, as well as the history of food and medicine in the early modern period
Prediction of cull cow carcass characteristics from live weight and body condition score measured pre slaughter
peer-reviewedA study was conducted to provide information on the degree of carcass finish of Irish
cull cows and to investigate the usefulness of live animal measurements for the prediction beef breeds (albeit with a moderate R2 value compared to the carcass weight prediction)
using objective, non-intrusive and easily measured live animal measurements, should
be of benefit to farmers finishing cull cows in Ireland.
of cull cow carcass characteristics. Live weight (LW) and body condition score
(BCS) were recorded on cows entering an Irish commercial slaughter facility between
September and November, 2005. Data pertaining to sire breed, age and carcass characteristics
were collected and subsequently collated for each cow. For analysis, cows
(n = 2163) were subdivided into three breed categories: dairy breed sired by Holstein/
Friesian (FR), sired by early-maturing beef breeds (EM) and sired by late-maturing
beef breeds (LM). The proportion of cows slaughtered at the desired (TARGET)
carcass standard (cold carcass weight ≥ 272 kg, carcass conformation class ≥ P+ and
carcass fat class ≥ 3) was low (on average 0.30), but did differ (P < 0.001) between the
dairy and beef breed categories (0.22, 0.47 and 0.53 for FR, EM and LM categories,
respectively). Regression procedures were used to develop equations to predict cold
carcass weight, carcass conformation score, carcass fat score and proportion in the
TARGET category from LW and BCS. Equations predicting cold carcass weight had
high R2 values for all breed categories (0.81, 0.85 and 0.79 for the FR, EM and LM,
respectively). Equations predicting carcass fatness had moderate R2 values for the beef
breed categories (0.65 and 0.59 for the EM and LM, respectively). Equations predicting
carcass conformation and the TARGET category yielded lower R2 values. The successful
prediction of carcass weight for all breed categories and of carcass fatness for th
Deepest Near-IR Surface Photometry of Galaxies in the Local Sphere of Influence
We present near-IR, deep (4 mag deeper than 2MASS) imaging of 56 Local Volume
galaxies. Global parameters such as total magnitudes and stellar masses have
been derived and the new near-IR data combined with existing 21cm and optical
B-band data. We present multiwavelength relations such as the HI mass-to-light
ratio and investigate the maximum total baryonic mass a galaxy can have.Comment: 4 pages, 3 figures, To be published in the proceedings of "Galaxies
in the Local Volume", ed. B. Koribalski, H. Jerje
From Capture to Sale
Based on exceptionally rich private papers of Portuguese slave traders, this study provides unique insight into the diet, health and medical care of slaves during their journey from Africa to Peru in the early seventeenth century.; Readership: All those interested in the history of the slave trade and slavery in both Africa and Spanish America, as well as the history of food and medicine in the early modern period
"GiGa": the Billion Galaxy HI Survey -- Tracing Galaxy Assembly from Reionization to the Present
In this paper, we review the Billion Galaxy Survey that will be carried out
at radio--optical wavelengths to micro--nanoJansky levels with the telescopes
of the next decades. These are the Low-Frequency Array, the Square Kilometer
Array and the Large Synoptic Survey Telescope as survey telescopes, and the
Thirty Meter class Telescopes for high spectral resolution+AO, and the James
Webb Space Telescope (JWST) for high spatial resolution near--mid IR follow-up.
With these facilities, we will be addressing fundamental questions like how
galaxies assemble with super-massive black-holes inside from the epoch of First
Light until the present, how these objects started and finished the
reionization of the universe, and how the processes of star-formation, stellar
evolution, and metal enrichment of the IGM proceeded over cosmic time. We also
summarize the high-resolution science that has been done thus far on high
redshift galaxies with the Hubble Space Telescope (HST). Faint galaxies have
steadily decreasing sizes at fainter fluxes and higher redshifts, reflecting
the hierarchical formation of galaxies over cosmic time. HST has imaged this
process in great structural detail to z<~6. We show that ultradeep
radio-optical surveys may slowly approach the natural confusion limit, where
objects start to unavoidably overlap because of their own sizes, which only SKA
can remedy with HI redshifts for individual sub-clumps. Finally, we summarize
how the 6.5 meter James Webb Space Telescope (JWST) will measure first light,
reionization, and galaxy assembly in the near--mid-IR.Comment: 8 pages, LaTeX2e requires 'aip' style (included), 8 postscript
figures. To appear in the proceedings of the `The Evolution of Galaxies
through the Neutral Hydrogen Window' conference, Arecibo Observatory Feb 1-3,
2008; Eds. R. Minchin & E. Momjian, AIP Conf Pro
An equatorial wind from the massive young stellar object S140 IRS 1
The discovery of the second equatorial ionized stellar wind from a massive
young stellar object is reported. High resolution radio continuum maps of S140
IRS 1 reveal a highly elongated source that is perpendicular to the larger
scale bipolar molecular outflow. This picture is confirmed by location of a
small scale monopolar near-IR reflection nebula at the base of the blueshifted
lobe. A second epoch of observations over a five year baseline show little
ordered outward proper motion of clumps as would have been expected for a jet.
A third epoch, taken only 50 days after the second, did show significant
changes in the radio morphology. These radio properties can all be understood
in the context of an equatorial wind driven by radiation pressure from the
central star and inner disc acting on the gas in the surface layers of the disc
as proposed by Drew et al. (1998). This equatorial wind system is briefly
compared with the one in S106IR, and contrasted with other massive young
stellar objects that drive ionized jets.Comment: 19 pages, 5 figures, accepted by ApJ, minor changes in light of
referees repor
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