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Effects of Size and Rate of Maturing on Carcass Composition of Pasture- or Feedlot- Developed Steers
Brown, A.H. Jr.,Camfield, P.K.,Baublits, R.T.,Pohlman, F.W.,Johnson, Z.B.,Brown, C.J.,Tabler, G.T.,Sandelin, B.A. Asian Australasian Association of Animal Productio 2006 Animal Bioscience Vol.19 No.5
Steers (n = 335) of known genetic backgrounds from four fundamentally different growth types were subjected to two production systems to study the main effects and possible interactive effects on carcass composition. Growth types were animals with genetic potential for large mature weight (LL), intermediate mature weight-late maturing (IL), intermediate mature weight-early maturing (IE), and small mature weight-early maturing (SE). Each year, in a nine year study, calves of each growth type were weaned and five steers of each growth type were developed on pasture or feedlot and harvested at approximately 20 and 14 mo of age, respectively. Data recorded were chilled carcass weight and percentages of forequarter, foreshank, chuck, rib, plate, brisket, hindquarter, round, rump, shortloin, sirloin, flank, lean, fat, bone, and retail cuts. The growth $type{\times}production$ system interaction was an important source of variation in chilled carcass weight (p = 0.0395) and percentage retail cuts (p = 0.001), lean (p = 0.001), fat (p = 0.001), rump (p = 0.0454), shortloin (p = 0.0487), and flank (p = 0.001). The ranking of the growth $type{\times}production$ system means for percentage lean was LL-pasture>IL-pasture = IE-pasture = SE-pasture>LL-feedlot, IL-feedlot>IE-feedlot = SE-feedlot. The growth $type{\times}production$ system interaction was non-significant (p>0.05) for forequarter, foreshank, chuck, rib, plate, brisket, hindquarter, round and bone. Growth types of IE and SE yielded greater (p<0.05) mean forequarter than did growth types of IL and LL ($51.6{\pm}0.3$ and $51.5{\pm}0.3$ vs. $51.1{\pm}0.3$ and $50.8{\pm}0.3%$). Mean bone was highest (p<0.05) for the LL growth type and lowest (p<0.05) for the SE growth type ($19.5{\pm}0.5$ vs. $16.8{\pm}0.5%$). Mean bone was greater (p<0.05) for the pastured steers than for the feedlot steers ($21.8{\pm}0.8$ vs. $14.5{\pm}0.6%$). These data indicate that growth type responded differently in the two production systems and that these results should be helpful in the match of genetics to production resources.
Characterising and reducing the blank response from mercury vapour sorbent tubes
Brown, R. C.,Braysher, E.,McGhee, E.,Goddard, S.,Ent, H.,Kim, K. H.,Nielsen, J. Royal Society of Chemistry 2017 Analytical methods Vol.9 No.18
<P>An investigation into the factors contributing to the blank response of sorbent tubes used for sampling and measuring mercury vapour is presented. These contributing factors are quantified and strategies to mitigate or remove their effects have been proposed - the most effective of which on a routine operational basis is the cleaning of the sorbent tubes in air to remove surface adsorbed mercury and any organic contaminants that can be oxidised. Contributions of up to 175 pg of mercury, or mercury equivalent mass, were identified and removed. The largest contributors were deeply absorbed mercury and hydrocarbons and other organic compounds oxidised and removed by heating in air. Decreasing the blank response resulted in an improvement in detection limit of a factor of two. This estimate was corroborated by a novel technique for assessing the detection limit of analytical methods employing multiple desorptions that relies on determining when the ratio of the third desorption response was equivalent to the first desorption response.</P>
Interaction of Beef Growth Type${\times}$Production System for Carcass Traits of Steers
Brown , A.H. Jr.,Camfield, P.K.,Johnson, Z.B.,Rakes, L.Y.,Pohlman, F.W.,Brown, C.J.,Sandelin, B.A.,Baublits, R.T. Asian Australasian Association of Animal Productio 2005 Animal Bioscience Vol.18 No.2
Steers (n=335) of known genetic backgrounds from four fundamentally different growth types were subjected to two production systems to study differences in carcass traits. Growth types were animals with genetic potential for large mature weight-late maturing, intermediate mature weight-late maturing, intermediate mature weight-early maturing and small mature weight-early maturing. Each year, in a nine-year study, calves of each growth type were weaned and five steers of each growth type were developed on pasture or feedlot and slaughtered at approximately 20 and 14 months of age, respectively. Data collected were pre-slaughter shrunk body weight (SBW); hot carcass weight (HCW); dressing percentage (DRESS); fat thickness at the $12^{th}$ and $13^{th}$ rib interface (FAT); percentage kidney, pelvic, and heart fat (KPH); longissimus muscle area (LMA); marbling score (MARB); quality grade (QG); and yield grade (YG). Year and growth type were significant for all carcass traits. The growth type${\times}$production system interaction was an important source of variation in SBW, HCW; FAT, YG and MARB. The same interaction was non-significant for DRESS, KPH, LMA and QG. Carcass differences in measures of fatness were greater in the feedlot system than in the pasture system. These data could aid producers in matching beef growth type to the production system most suitable for efficient use of resources.
New decay scheme of theSb8551136<sup>6−</sup>isomer
Lozeva, R.,Odahara, A.,Moon, C.-B.,Nishimura, S.,Doornenbal, P.,Naï,dja, H.,Nowacki, F.,Sö,derströ,m, P.-A.,Sumikama, T.,Lorusso, G.,Wu, J.,Xu, Z. Y.,Baba, H.,Browne, F.,Daido, R.,Daugas, American Physical Society 2015 PHYSICAL REVIEW C - Vol.92 No.2
International key comparison CCQM-K94: 10 μmol/mol dimethyl sulfide in nitrogen
Lee, S,Heo, G S,Kim, Y,Oh, S,Han, Q,Wu, H,Konopelko, L A,Kustikov, Y A,Kolobova, A V,Efremova, O V,Pankratov, V V,Pavlov, M V,Culleton, L P,Brown, A S,Brookes, C,Li, J,Ziel, P R,van der Veen, A M H IOP 2016 Metrologia Vol.53 No.-
<P></P> <P>Dimethyl sulfide (DMS) is an important compound in monitoring climate change and is monitored by the World Meteorological Organization Global Atmospheric Watch Volatile Organic Compounds (WMO-GAW VOC) program at several monitoring sites. It is essential that measurement results are accurate and consistent among the assigned values for primary gas mixtures to meet the WMO requirement. The purpose of this comparison is to compare the measurement capability of DMS at approximately 10 μmol/mol and expectation to contribute the establishment of traceability to single measurement scale for DMS between NMIs.</P> <H2>Main text</H2> <P>To reach the main text of this paper, click on <A HREF='http://www.bipm.org/utils/common/pdf/final_reports/QM/K94/CCQM-K94_Final_Report.pdf'>Final Report</A>. Note that this text is that which appears in Appendix B of the BIPM key comparison database <A HREF='http://kcdb.bipm.org/'>kcdb.bipm.org/</A>.</P> <P>The final report has been peer-reviewed and approved for publication by the CCQM, according to the provisions of the CIPM Mutual Recognition Arrangement (CIPM MRA).</P>