A5053653271- Meat and Animal Product Quality
- Genetic and phenotypic traits in livestock
- Animal Nutrition and Physiology
- Pharmacological Effects and Assays
- Ruminant Nutrition and Digestive Physiology
- Calpain Protease Function and Regulation
- Effects of Environmental Stressors on Livestock
- Postharvest Quality and Shelf Life Management
- Identification and Quantification in Food
- Livestock Management and Performance Improvement
- Plant biochemistry and biosynthesis
- Livestock Farming and Management
- Food Quality and Safety Studies
- Protein Hydrolysis and Bioactive Peptides
- Molecular Biology Techniques and Applications
- Pineapple and bromelain studies
- Plant Gene Expression Analysis
- Advanced Chemical Sensor Technologies
- Pesticide Residue Analysis and Safety
- Muscle metabolism and nutrition
- Bee Products Chemical Analysis
- Sensory Analysis and Statistical Methods
- Physiological and biochemical adaptations
- Marine animal studies overview
- Thermoregulation and physiological responses
Agricultural Research Council of South Africa
2013-2023
University of Pretoria
2021
Animal Production Institute
2003-2019
Consiglio per la ricerca in agricoltura e l’analisi dell’economia agraria
2015
University of Johannesburg
1998
South African Nuclear Energy Corporation (South Africa)
1987
This study was conducted to evaluate the carcass and meat quality of Boer goats unimproved indigenous South Africa, under delayed chilling conditions. Ten per breed were used for study. The slaughtered according standard abattoir procedures. dressed carcasses held at 10–15 °C 6 hours before 4 until 24 (delayed chilling). pH/temperature values, instrumental colour (CIE L*, a*, b*, chroma hue angle), surface myoglobin pigments (deoxyglobin, oxyglobin metmyoglobin), water-holding capacity...
Various meat quality characteristics of six muscles (Longissimus thoracis et lumborum (LTL), Semimembranosus (SM), Biceps femoris (BF), Supraspinatus (SS), Infraspinatus (IS), Semitendinosus (ST)) from large-frame Boer Goats (BG) and Indigenous Veld (IVG: Cape Speckled the Lob Ear) were studied. Weaner male BG (n = 18; 10 bucks 8 wethers) IVG 19; 9 raised on hay natural grass, a commercial pelleted diet to live weight 30-35 kg. All goats slaughtered at abattoir dressed carcasses chilled 4 °C...
Two experiments measured the ability of tropically adapted beef breeds from resource-poor farmer herds in South Africa to produce high quality under commercial feedlot conditions. The farming sector consists ‘emerging’ and communal farmers. herd breed groups consisted Sanga types (tropically Bos taurus breed) including Nguni, Tuli, Bonsmara Drakensberger, as well Brahman non-descript groups. cattle were slaughtered after an average 97 days first experiment 92, 140 169 on a grain-based diet...
Weaner male Boer Goats (BG; n = 36; 21 bucks and 15 wethers) large frame Indigenous Veld (IVG; 41; 20 were raised on hay natural grass ad libitum the recommended amount of commercial pelleted diet to a live weight between 30 35 kg. Carcass quality characteristics (live weight, carcass weights, dressing %, chilling loss eye muscle area) measured. The right sides carcasses divided into wholesale cuts dissected subcutaneous fat, meat bone. Large Goat (IVG) wethers slightly lighter than IVG with...
The South African classification system describes beef carcasses in regard to visual fat cover, conformation and age by dentition. Animal provides a fairly accurate description of expected eating quality tenderness an industry where other sources variation are limited. Since deregulation the 90s many changes have occurred all parts value chain. This paper presents number case studies that focussed on meat quality, but particular over past two decades. These include feeding regime, use beta...
The study describes the relationship between visual and instrumental measurements for colour tenderness five South African beef breeds: Bos indicus (Brahman), Sanga type (Nguni), British taurus (Angus), European (Charolais) composite (Bonsmara). Ten animals per genotype were used (total = 50). carcasses split right sides electrically stimulated, while left not stimulated. Steaks aged until three days post mortem on polystyrene plates 9, 14 20 in vacuum bags. steaks evaluated by analysis...
Carcass quality includes a battery of essential economic meat traits that play significant role in influencing farmer breed preferences. A preliminary study was undertaken to investigate the carcass and associated genomic regions small nucleus animals are representative South African goat genetic resources. Samples Boer (n = 14), Northern Cape Speckled Eastern Xhosa Lob ear 12), Nguni/Mbuzi 13), Village 20) were genotyped using Illumina SNP50K phenotyped for traits. SA goats had heavier warm...
The most important factor that determines beef tenderness is its proteolytic activity, and the balance between calpain-1 protease activity calpastatin inhibition especially important, while contributions can also arise from calpain-2 and, possibly, calpain-3. meat ageing process itself affects these processes. To determine whether genotypes in calpain-calpastatin system enhance through a 20-day period, South African purebred bulls (n = 166) were genotyped using Illumina BovineHD SNP BeadChip...
Abstract BACKGROUND Baseline research on the toughness of Egyptian goose meat is required. This study therefore investigates post mortem pH and temperature decline (15 min–4 h 15 min mortem) in pectoralis muscle (breast portion) this gamebird species. It also explores enzyme activity Ca 2+ ‐dependent protease (calpain system) lysosomal cathepsins during rigor mortis period. RESULTS No differences were found for any variables between genders. The occurs quite rapidly ( c = −0.806; ultimate...
In Phase1 of this study, three breed types (Simmentaler-, Brahman- and Nguni bulls; n = 60 each) were grain-fed slaughtered at 12 months age (A-age, fat-class 2). Feed was withdrawn for either hours or 24 pre-slaughter. Within each feed withdrawal group, electrical stimulation (ES) treatments applied, viz. ES 15 seconds, 120 seconds no stimulation. Phase 2, the effects animal feeding regime investigated using A-age (feedlot pasture), AB-age pasture) B-age (pasture) animals. All carcasses...