74,492 research outputs found
A hedonic model of lamb carcass attributes
No full textLamb carcass value is widely reported to be a function of lean meat yield, which is the relationship between muscle, fat and bone. Five retailers and five wholesalers assessed 47 lamb carcasses from diverse genotypes and scored seven attributes. A hedonic model reveals that conformation attributes were more highly valued (16 c/kg) relative to yield characteristics (4 c/kg). Meat colour and fat distribution were significant for retailers, but less important for wholesalers. Genotype was not a strong indicator of conformation. Eye muscle area and depth were correlated with Fat C; however, these were not significant. These results indicate that carcass conformation, meat colour and fat distribution should be incorporated into carcass grading models.Hedonic, lamb, conformation and meat value, attributes, Livestock Production/Industries,
THE EFFECT OF MARKET CONCENTRATION ON LAMB MARKETING MARGINS
No full textThe national four-firm concentration ratio in the lamb slaughtering and processing industry increased from 55 percent in 1980 to 70 percent in 1992. The effect of increasing lamb packer concentration on lamb marketing margins is examined. A relative price spread (RPS) model for farm-to-wholesale and wholesale-to-retail marketing margins was estimated using three-stage least squares (3SLS). The 3SLS results indicate that increased lamb packer concentration has had relatively small, positive effects on lamb marketing margins.Lamb industry, Market concentration, Marketing margins, Livestock Production/Industries, Marketing,
Supporting Data for Incorporating Polar Oxazolidinones into Polycyclooctadiene via Frontal Ring-Opening Metathesis Polymerization
No full textA full description can be found in the README.txt file. The files below include raw data used in the corresponding manuscript including: nuclear magnetic resonance (NMR) data, size exclusion chromatography (SEC) data, thermal gravimetric analysis (TGA) data, differential scanning calorimetry (DSC) data, attenuated total reflectance Infrared (IR) data, front velocity data, and front temperature data. The ChemDraw schemes and photos of tensile samples are included as .jpg files. The videos recorded to calculate front velocity are included as .mp4 files. NMR data are included as .fid files and can be opened in any NMR analysis software (e.g. MestReNova). All other raw data was converted to .csv or .txt files for simplicity and can be opened using a spreadsheet editor such as Microsoft Excel.Frontal ring-opening metathesis polymerization (FROMP) is a rapid, facile method that requires little energy input by utilizing the polymerization exotherm to self-propagate. Although FROMP is efficient, its scope has been limited to highly strained monomers to provide enough energy to drive the polymerization front. Copolymerization has been a viable strategy to introduce more diverse monomers to make polar-functionalized dicyclopentadiene-based thermosets. In contrast, analagous FROMP copolymerizations to produce soluble thermoplastics containing polar repeat units have yet to be explored. Herein, we report the frontal copolymerization of cyclooctadiene (COD) with 1–5 mol % of a lower ring-strain oxazolidinone-fused cyclooctene (Oxa) to synthesize polybutadiene-based copolymers. As expected, as the Oxa loading increased, the front velocity decreased by up to 50% and maximum front temperature decreased by ~16 °C compared to pCOD homopolymer. While the degradation and glass transition temperatures were minimally affected, the polar Oxa units greatly influenced crystallization and tensile properties of the resulting materials. In particular, the ductility dramatically increased from 220% strain at break for pCOD to 1900% for copolymers with 5 mol % Oxa. This study provides an easy method to incorporate polar functionality into ubiquitous polyolefins and further demonstrates the impact of dipoles on material properties towards future applications.National Science Foundation (NSF) Center for Sustainable Polymers (CSP) (CHE-1901635)3M Non-Tenured Faculty AwardUniversity of Minnesota (UMN)Minnesota NMR Center: National Institutes of Health (NIH, S10OD011952)American Association for the Advancement of Science (AAAS) Marion Milligan Mason Award for Women in the Chemical SciencesLester C. and Joan M. Krogh Excellence FellowshipUMN Polymer Processing and Characterization Facility: NSF Materials Research Science and Engineering Center (MRSEC) (DMR-2011401)Aguilar-Romero, Jazmin E; Rogan, Elizabeth G; Wong, Allison R; Hosford, Brandon M; Mosconi, Angela L; Lamb, Jessica R. (2025). Supporting Data for Incorporating Polar Oxazolidinones into Polycyclooctadiene via Frontal Ring-Opening Metathesis Polymerization. Retrieved from the Data Repository for the University of Minnesota (DRUM), https://doi.org/10.13020/7fxw-6g59
Luke F. Lamb Papers
No full textLuke F. Lamb was the associate director of ITV (Instructional Television) at the University of Missouri. In the early 1960s, Lamb was the director of educational media for the Division of Continuing Education of the Oregon State System of Higher Education, representing stations KOAP and KOAC (Corvallis/Portland). In December 1964, Lamb was nominated to National Association of Educational Broadcasters' (NAEB) Television Board of Directors. Starting in February 1966, he chaired NAEB's Standing Network Committee of the NAEB and was chair of the Network Committee by November. From 1967 to 1968, Lamb presided over the Western Education Network, which had its host station at KVIE, Sacramento, California. In 1968, Lamb started his association with the University of Wisconsin as director of Educational Communications with University Extension. In September 1972, he became dean of Educational Communications and chair of the Wisconsin Educational Communications Board. Currently, Lamb is Director of Broadcasting, Wisconsin Educational Communications Board and Director of the Extension Communications Division, University of Wisconsin-Extension. The collection contains early Western Educational Network files from 1964 to 1968. It also contains the 50th anniversary publication of station WHA, University of Wisconsin, and the 75th anniversary publication commemorating Wisconsin Public Broadcasting
Supporting Data for Accessing broader vinyl ether scope for sequential cationic–anionic polymerization to synthesize multi-mechanism block copolymers
No full textFiles Contained:
NMR: nuclear magnetic resonance (NMR) spectroscopy data is included for each sample. In each folder is the data as downloaded from the instrument. The .fid file can be opened in any NMR analysis software (e.g. MestReNova).
SEC dRI: size exclusion chromatography (SEC) data for each polymer is included in a separate .csv or .txt file.
TGA data: thermogravimetric analysis (TGA) data for each polymer is included in a separate .csv file
DSC data: differential scanning calorimetry (DSC) data for each polymer is included in a separate .csv file.
Figures: This folder contains .jpg files for the figures in the main text and SI.
UV-Vis data: UV-Vis data is included in a separate .csv file.Experimental data from manuscript and supplementary information for the publication: Hosford, B. M.; Li, J. O'Connor, N. D.; Lamb, J. R.* "Accessing broader vinyl ether scope for sequential cationic–anionic polymerization to synthesize multi-mechanism block copolymers" Polym. Chem. 2026, Advance Article.National Science Foundation (NSF) Materials Research Science and Engineering Center (MRSEC) (DMR-2011401)University of MinnesotaResearch Experience for Undergraduates (REU) Program of the National Science Foundation (DMR-2244111)Lester C. and Joan M. Krogh Excellence Fellowship2025–26 Doctoral Dissertation Fellowship (DDF) from the University of Minnesota Graduate SchoolResearch and Innovation Office (RIO)College of Science and Engineering (CSE)Department of Chemistry at UMNOffice of the Director, National Institutes of Health (NIH, S10OD011952)Hosford, Brandon; Li, Jinxiao; O'Connor, Nora; Lamb, Jessica. (2026). Supporting Data for Accessing broader vinyl ether scope for sequential cationic–anionic polymerization to synthesize multi-mechanism block copolymers
. Retrieved from the Data Repository for the University of Minnesota (DRUM), https://doi.org/10.13020/e0kz-8g26
The ultra-rapid chilling of lamb carcasses
No full textEnd of Project ReportThe practice in Irish commercial abattoirs is to chill lamb carcasses for a period of approximately 16 hours at 2 - 4°C, at which stage the core temperature of the carcass has reached 7°C. Chilling in this manner is considered necessary because it is generally held that faster chilling leads to toughening of the meat. The objective of this work was to develop a continuous ultra-rapid chilling system for lambs which would reduce carcass chilling time without adversely affecting the quality of the meat.Food Sub-Programme (Sub-measure 3 (ii) - Institutional R&D) of the Operational Programme for Industrial Development - Department of Agriculture and Foo
FEASIBILITY OF OPERATING A LAMB SLAUGHTER PLANT IN NORTH DAKOTA
No full textA group of North Dakota lamb producers who are members of Valley Wool Growers Association identified several niche markets for high quality North Dakota lambs. The potential availability of a closed, but formerly federally inspected, livestock slaughter and meat processing facility in Steele County heightened their interest in determining the feasibility of a cooperatively owned lamb slaughter and processing facility. The cooperative would be patterned after existing and proposed slaughter cooperatives, whereby cooperative members would own shares to supply lambs to the plant on a year-round basis. The analysis was conducted in several sections corresponding to critical factors which affect feasibility of the plant. The critical factors analyzed included federal inspection requirements, the potential of an adequate supply of lambs, the potential for a viable niche market, plant investment and operating costs, expected return, alternative lamb purchase prices, alternative lamb carcass sales prices, and several investment and expense scenarios. The building and equipment investment was projected to be 3,013,877 per year which included 2,340,000 for lamb purchase. Income from lamb meat sales and pelts was estimated at 0.90 per pound and selling for 213,877 at full capacity. Therefore, other scenarios were investigated which would enable the plant to operate profitably. The maximum price that could be paid for lambs to pay all investment and operating costs, including a 7.5 percent return to member equity, was 0.7358, or a reduction in the lamb carcass sales price to 0.7004. The range in probable prices that could be paid for lambs is 0.80 per pound with a likely price of $0.75. The proposers of the cooperative will need to decide if prices in this range would be sufficient to lure enough member investors to provide the 20,000 lambs necessary to operate the plant.lambs, slaughter, processing, niche market, lamb prices, lamb carcass prices, feasibility, cooperative, federal meat inspection, plant operating expenses, Agribusiness,
Ewe-lamb bonding behaviours at birth are affected by maternal undernutrition in pregnancy
No full textMaternal undernutrition in pregnancy results in low birth-weights and impaired postnatal survival in sheep. Largely anecdotal evidence suggests that the expression of appropriate maternal and neonate behaviours may also be disrupted by undernutrition. In the present study, we investigated the effect of a moderate (35 %) reduction in ewe nutritional intake in pregnancy on the expression of ewe-lamb bonding behaviours in primiparous Scottish Blackface ewes. Low-intake (L) ewes had significantly higher plasma progesterone than high-intake (H) ewes from mid-gestation onwards (e.g. plasma progesterone at 20 weeks (ng/ml): H 15.72, L 22.38, SED 1.80, P</p
Simulation of ultrasonic lamb wave generation, propagation and detection for an air coupled robotic scanner
No full textA computer simulator, to facilitate the design and assessment of a reconfigurable, air-coupled ultrasonic scanner is described and evaluated. The specific scanning system comprises a team of remote sensing agents, in the form of miniature robotic platforms that can reposition non-contact Lamb wave transducers over a plate type of structure, for the purpose of non-destructive evaluation (NDE). The overall objective is to implement reconfigurable array scanning, where transmission and reception are facilitated by different sensing agents which can be organised in a variety of pulse-echo and pitch-catch configurations, with guided waves used to generate data in the form of 2-D and 3-D images. The ability to reconfigure the scanner adaptively requires an understanding of the ultrasonic wave generation, its propagation and interaction with potential defects and boundaries. Transducer behaviour has been simulated using a linear systems approximation, with wave propagation in the structure modelled using the local interaction simulation approach (LISA). Integration of the linear systems and LISA approaches are validated for use in Lamb wave scanning by comparison with both analytic techniques and more computationally intensive commercial finite element/difference codes. Starting with fundamental dispersion data, the paper goes on to describe the simulation of wave propagation and the subsequent interaction with artificial defects and plate boundaries, before presenting a theoretical image obtained from a team of sensing agents based on the current generation of sensors and instrumentation
Lamb carcass quality and yield grade standards
No full text1 online resource (PDF, 2 pages)This archival publication may not reflect current scientific knowledge or recommendations. Current information available from the University of Minnesota Extension: https://www.extension.umn.edu.Christians, C. J.; Epley, R. J.; Jacobs, R. E.. (1971). Lamb carcass quality and yield grade standards. Retrieved from the University Digital Conservancy, https://hdl.handle.net/11299/206788
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