Paunch is a fibrous solid residue consisting of partially digested feed from the stomachs of processed cattle. It is the largest untapped solid waste stream from animals at meat processing plants, and potentially a valuable source of fibres for the production of sustainable and potentially higher-value natural biocomposite materials. Paunch was obtained from the waste effluent of a red meat processing plant, and the fibre characteristics of the as-obtained material were studied and benchmarked against wood flour and ground buffel grass, with a view to evaluating the potential of paunch as a fibre for polymer composites. The ground paunch possessed a rough fibrous surface and fibre-like characteristics that were comparable to both wood flour and ground buffel grass, demonstrating their potential for use in composites. Without any pre-treatment or compatibilisation, composites of a representative biopolymer, poly(3-hydroxybutyrate-co-3-hydroxyvalerate) (PHBV) and ground paunch were successfully produced for the first time via extrusion, with up to 50 wt% paunch content. Mechanical property analysis showed that, at 30 wt% content, PHBV/ground paunch composites yielded mechanical properties that were comparable to those of composites with ground buffel grass.
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http://dx.doi.org/10.3390/polym14183704 | DOI Listing |
Polymers (Basel)
September 2022
School of Chemical Engineering, The University of Queensland, St. Lucia, QLD 4072, Australia.
Paunch is a fibrous solid residue consisting of partially digested feed from the stomachs of processed cattle. It is the largest untapped solid waste stream from animals at meat processing plants, and potentially a valuable source of fibres for the production of sustainable and potentially higher-value natural biocomposite materials. Paunch was obtained from the waste effluent of a red meat processing plant, and the fibre characteristics of the as-obtained material were studied and benchmarked against wood flour and ground buffel grass, with a view to evaluating the potential of paunch as a fibre for polymer composites.
View Article and Find Full Text PDFMar Pollut Bull
October 2021
Department of Resources, PO Box 1762, Rockhampton, Queensland 4700, Australia.
Loss of sediment and particulate nutrients in runoff from the extensive grazing lands of the Fitzroy Basin, central Queensland, continue to contribute to the declining health of the Great Barrier Reef. This study measured differences in hydrology and water quality from conservative and heavy grazing pressures on rundown improved grass pastures in the Fitzroy Basin. Conservative grazing pressure was defined as the safe long-term carrying capacity for rundown buffel grass pasture, whereas heavy grazing pressure was defined as the recommended stocking rate for newly established buffel grass pasture.
View Article and Find Full Text PDFJ Health Soc Behav
September 2020
University of Antwerp, Antwerpen, Belgium.
Despite engagement with the construct of power relations, research on the political economy of health has largely overlooked organized labor as a determinant of well-being. Grounded in the theory of power resources, our study aims to fill this gap by investigating the link between country-level union density and mental health while accounting for the compositional effects of individual-level union membership. We use three waves of the European Social Survey (N = 52,737) and a variation on traditional random-effects models to estimate both the contextual and change effects of labor unions on depressive symptoms.
View Article and Find Full Text PDFSensors (Basel)
February 2018
Environment and Sustainability Institute, University of Exeter, Penryn, Cornwall TR10 9FE, UK.
The monitoring of invasive grasses and vegetation in remote areas is challenging, costly, and on the ground sometimes dangerous. Satellite and manned aircraft surveys can assist but their use may be limited due to the ground sampling resolution or cloud cover. Straightforward and accurate surveillance methods are needed to quantify rates of grass invasion, offer appropriate vegetation tracking reports, and apply optimal control methods.
View Article and Find Full Text PDFTrop Anim Health Prod
February 2016
Departament of Animal Science, Universidade Federal de Lavras-UFLA, Lavras, Minas Gerais, 37200-000, Brazil.
The aim of this study was to evaluate the intake, digestibility, performance, and carcass characteristics of lambs fed different levels of replacement (0, 15, 30, and 45 % based on dry matter, DM) of soybean meal (SM) by detoxified castor meal (DCM). Twenty-four and 32 intact hair lambs of nondescript breed (21.7 ± 2.
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