Quantitative evaluation of starch determination in feed samples using Near Infra-red Reflectance
- Authors: Mapekula, Nwabisa Nolwazi
- Date: 2012
- Subjects: Near infrared spectroscopy , Animal feeding , Feeds -- Enzyme content
- Language: English
- Type: Thesis , Masters , MSc
- Identifier: vital:10421 , http://hdl.handle.net/10948/d1015617
- Description: In an attempt to reduce the costs and turn around times experienced with outsourcing starch analysis in finished feed products, the company decided to invest in a NIR instrument to carry out such analyses in house. The particular instrument purchased by the company comes with a build in calibration for specific finished feed products and the main objective of this investigation was to evaluate whether the instrumentation and build in calibration gives reliable analyses of a finished poultry feed. The results obtained showed that : - The NIR results obtained have a positive bias compared to the theoretical (formulation specified value) and also to the value obtained by enzymatic starch analysis. - Despite the positive bias, the starch values were well within the allowable limits - Repeatability measurements on the data generated by two different analysts showed that while the percentage relative standard deviations obtained (< 1.0 percent) were well within the company specifications of percentage RSD < 5.0 percent, the inter sample repeatability showed small, but significant variation. - The results for intermediate precision showed that there is no statistically significant difference between the results obtained by two different analysts, nor was there any difference in the results of the same samples analysed at different time periods. - Reproducibility could not be evaluated due to the lack of another instrument within the company that were similarly set up as the instrument used for the investigation. This investigation has shown that, given the restrictions enforced by the build incalibration of the NIR instrument, the use of NIR for the analyses of the finished feed product is valid, but will require that careful attention be paid to data collection procedures.
- Full Text:
- Date Issued: 2012
- Authors: Mapekula, Nwabisa Nolwazi
- Date: 2012
- Subjects: Near infrared spectroscopy , Animal feeding , Feeds -- Enzyme content
- Language: English
- Type: Thesis , Masters , MSc
- Identifier: vital:10421 , http://hdl.handle.net/10948/d1015617
- Description: In an attempt to reduce the costs and turn around times experienced with outsourcing starch analysis in finished feed products, the company decided to invest in a NIR instrument to carry out such analyses in house. The particular instrument purchased by the company comes with a build in calibration for specific finished feed products and the main objective of this investigation was to evaluate whether the instrumentation and build in calibration gives reliable analyses of a finished poultry feed. The results obtained showed that : - The NIR results obtained have a positive bias compared to the theoretical (formulation specified value) and also to the value obtained by enzymatic starch analysis. - Despite the positive bias, the starch values were well within the allowable limits - Repeatability measurements on the data generated by two different analysts showed that while the percentage relative standard deviations obtained (< 1.0 percent) were well within the company specifications of percentage RSD < 5.0 percent, the inter sample repeatability showed small, but significant variation. - The results for intermediate precision showed that there is no statistically significant difference between the results obtained by two different analysts, nor was there any difference in the results of the same samples analysed at different time periods. - Reproducibility could not be evaluated due to the lack of another instrument within the company that were similarly set up as the instrument used for the investigation. This investigation has shown that, given the restrictions enforced by the build incalibration of the NIR instrument, the use of NIR for the analyses of the finished feed product is valid, but will require that careful attention be paid to data collection procedures.
- Full Text:
- Date Issued: 2012
An analysis of the role of a community-based project on poverty alleviation: a case of Daantjie Bakery in the Mbombela municipaty, Mpumalanga Province
- Authors: Mbontsi, Dunyiswa Koliswa
- Date: 2010
- Subjects: Economic development projects -- Evaluation , Economic development -- South Africa -- Mpumalanga
- Language: English
- Type: Thesis , Masters , MPA
- Identifier: vital:8195 , http://hdl.handle.net/10948/1339 , Economic development projects -- Evaluation , Economic development -- South Africa -- Mpumalanga
- Description: The South African policy framework on Local Economic Development encourages the establishment of community-based projects in an attempt to address the challenges posed by poverty in local communities. It appears that community-based projects have a role to play in poverty alleviation. Municipalities are supposed to encourage and support the establishment of projects aimed at poverty alleviation in their jurisdictions. The Mbombela Local Municipality has played its role in this regard by supporting the establishment of the Daantjie Bakery Project in 2000. In an attempt to evaluate the impact of community-based projects on poverty alleviation, this study investigated the role played by the Daantjie Bakery Project in local economic development of the Daantjie local community in the Mbombela Local Municipality. Participants included community members of Daantjie, employees of the bakery, and the project manager. The study found that, indeed community-based projects play a role in local economic development since they contribute towards employment creation and poverty alleviation.
- Full Text:
- Date Issued: 2010
- Authors: Mbontsi, Dunyiswa Koliswa
- Date: 2010
- Subjects: Economic development projects -- Evaluation , Economic development -- South Africa -- Mpumalanga
- Language: English
- Type: Thesis , Masters , MPA
- Identifier: vital:8195 , http://hdl.handle.net/10948/1339 , Economic development projects -- Evaluation , Economic development -- South Africa -- Mpumalanga
- Description: The South African policy framework on Local Economic Development encourages the establishment of community-based projects in an attempt to address the challenges posed by poverty in local communities. It appears that community-based projects have a role to play in poverty alleviation. Municipalities are supposed to encourage and support the establishment of projects aimed at poverty alleviation in their jurisdictions. The Mbombela Local Municipality has played its role in this regard by supporting the establishment of the Daantjie Bakery Project in 2000. In an attempt to evaluate the impact of community-based projects on poverty alleviation, this study investigated the role played by the Daantjie Bakery Project in local economic development of the Daantjie local community in the Mbombela Local Municipality. Participants included community members of Daantjie, employees of the bakery, and the project manager. The study found that, indeed community-based projects play a role in local economic development since they contribute towards employment creation and poverty alleviation.
- Full Text:
- Date Issued: 2010
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