Research@Lincoln
Research@Lincoln is an open access institutional repository collecting the research produced by Lincoln University staff and students. You may also be interested in Data@Lincoln or Lincoln University Living Heritage.
Students wishing to submit a thesis or dissertation should see the Depositing theses and dissertations guide.
Recent Submissions
Item Restricted A gastrointestinal parasite infection model for chronic stress in livestock and its impact on meat quality(ACK 2024, 2024-11-13)Livestock stressors are known to have an impact on both animal welfare and meat quality. As a model of acute stress, we have previously demonstrated the impact of pre-slaughter simulated mustering on several important meat quality markers in lamb, including high pH [1, 2]. To examine a chronic stressor in livestock, we have adapted a model of a sub-clinical infection with gastrointestinal nematode(GIN) parasite infection in sheep. Six month old ram lambs were challenged with a mixed infection of Trichostrongylus colubriformis and Teladorsagia circumcincta (Treatment group, n=6), which are common gastrointestinal parasites frequently encountered in pasture, and compared with those without parasites (Control, n=6) (AEC2023-71). The goal is to understand how parasite infection can impact on inflammatory response as a proxy for animal welfare, along with determining if parasite infection has an impact on meat quality markers. We will also use an emerging metabolomics method, rapid evaporative ionisation mass spectrometry, to provide complementary analytical information on changes to organ and meat metabolite and lipid composition. This data will contribute towards defining and designing further investigations on chronic stressors in livestock. In future, characterised biomarkers of stressors could be used for enhancing animal welfare and confirm the relationship between minimising pre-slaughter stressors and improving the consistency of meat quality.Item Restricted The effect of farmyard stress on meat quality: A model enabling the search for predictive biomarkers of meat pH(Japan Society for Meat Science and Technology, 2022-08)High pH meat is frequently associated with poor shelf-life and eating quality, and pH is a commonly used marker for meat quality. Early detection of high pH lamb is desirable and can improve meat quality control. Due to the variability in the occurrence of high pH at meat processing plants in New Zealand, there is a need for reproducible models that allow the study of abnormal pH in meat. We devised a pilot trial using standardised farmyard stress to produce high pH meat. To confirm the impact of the model on meat we measured biochemical features in the meat samples that can be related to meat pH. In future, biomarkers of high pH in the meat could be used for enhancing animal welfare and confirm the relationship between minimising pre-slaughter stress and improving the consistency of meat quality.Item Open Access Fuel choices for cooking and heating and gender empowerment: Implications for promoting gender equality and sustainable rural development(Elsevier B.V., 2025-01)This study evaluates the impact of fuel choices for cooking and heating on gender empowerment using rural household survey data from China. We investigate rural households' fuel-stacking behaviors by classifying fuels into non-clean, clean, and mixed categories and distinguish an incomplete energy transition (i.e. switching from non-clean fuels to mixed fuels) from a complete energy transition (i.e. switching from non-clean to clean fuels). The decision-making power of men and women measures gender empowerment. We use the multinomial endogenous switching regression model to address the endogeneity issue associated with rural households' fuel choices. The results show that incomplete and complete energy transitions for heating significantly increase men's decision-making power, while the same transitions for cooking have no significant impact. Incomplete and complete energy transitions for cooking significantly empower rural women, while a complete energy transition for heating also significantly empowers women. These findings suggest that promoting a complete energy transition supports broader rural development by empowering women to participate more actively in household decision-making. We also find that a complete energy transition for cooking and heating reduces the decision-making power gap between men and women more than an incomplete one, highlighting that a complete energy transition contributes more to gender equality. Therefore, fostering complete energy transitions is essential for closing gender disparities and establishing a foundation for sustainable rural development through enhanced female empowerment.Item Open Access Peptidomic analysis of anionic oat intestinal peptides(2023-07-04)Many studies have focused in recent years on the functional and nutritional properties of proteins in cereal and the bran and the bioactive attributes of peptides derived from these proteins. In vitro digestion model in combination with anion exchange chromatography isolates the cereal anionic intestinal peptides which, unlike cereal hydrophobic peptides, has not been proven to strongly relate to the bioactivity of peptides. The aim of my PhD project is to identify the bioactive anionic peptides derived from the storage protein of cereal bran and to assess their bioactivity. The protein was extracted from oat bran, wheat bran and barley and was then subjected to in vitro digestion model. The intestinal digesta of oat bran protein showed highest overall antioxidant and ACE inhibitory activity and was fractionated by anion exchange chromatography, and the fractions of which with highest antioxidant and ACE inhibitory activity were selected for sequencing by R-HPLC-MS/MS. The peptides in the fraction candidates were identified. In addition, the most abundant peptides in the fraction candidates were identified and the relation of those abundant peptides to bioactivity was evaluated. For future perspective, the ACE inhibitory peptide candidates will be analysed by molecular docking. The peptide will be selected for synthesis and assayed to confirm the discovery of the novel peptides. Meanwhile, it is interesting to bring the novel peptides to cell-line works and in vivo.Item Open Access Land use control under the Resource Management Act : Submission to Ministry for the Environment on the McShane "think piece"(Lincoln University. Environmental Management and Design Division., 1998-06)In accordance with the invitation made to provide written feedback under the framework of questions drafted by the Ministry, please find enclosed our submissions dealing with Questions 1-4, 6-7, and 9- 12. Our response only covers a selection of the stipulated questions because we chose to construct a Divisional team approach, and this meant individual participants focused upon their interests and areas of expertise.
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