title: Processibility of corn protein blends and resulting properties of the extrudates

authors: Rosentrater, Kurt A.

abstract: During the last decade, the global biofuels industry has experienced exponential growth. By-products such as high protein corn gluten meal (CGM) and high fibre distillers dried grains with solubles (DDGS) have grown in parallel. CGM has been shown to be suitable as a biopolymer; the high fibre content of DDGS reduces its effectiveness, although it is considerably cheaper. In this study, the processing behaviour of CGM and DDGS blends were evaluated and resulting extrudate properties were determined. Prior to processing, urea was used as a denaturant. DDGS:CGM ratios of 0, 33, 50, 66 and 100% were processed in a single screw extruder, which solely used dissipative heating, with a 2 mm circular die. Resulting screw speeds ranged from 216 to 228 rpm, and die exit temperatures ranged from 96 to 150oC. Blends containing DDGS were less uniformly consolidated and resulted in more dissipative heating. Blends showed multiple glass transitions, which is characteristic of mechanically compatible blends. Transmission electron microscopy revealed phase separation on a micro-scale, although distinct CGM or DDGS phases could not be identified. On a macro-scale, optical microscopy suggested that CGM-rich blends were better consolidated, supported by visual observations of a more continuous extrudate formed during extrusion. As with all biological materials, the extruded blends exhibited sorption behaviour over time, the magnitude of which varied according to blend ratio. EMC values ranged from approximately 0% to nearly 50%, depending upon the humidity level and blend ratio. Nonlinear regression was successfully used to model the effects of relative humidity and blend ratio on the equilibrium moisture contents, with a coefficient of determination of 99%. Future work should aim to also characterize the mechanical properties of these blends to assess their suitability as either bioplastic feedstock or pelletized livestock feed.

text: Processibility of corn protein blends and resulting properties of the extrudates During the last decade, the global biofuels industry has experienced exponential growth. By-products such as high protein corn gluten meal (CGM) and high fibre distillers dried grains with solubles (DDGS) have grown in parallel. CGM has been shown to be suitable as a biopolymer; the high fibre content of DDGS reduces its effectiveness, although it is considerably cheaper. In this study, the processing behaviour of CGM and DDGS blends were evaluated and resulting extrudate properties were determined. Prior to processing, urea was used as a denaturant. DDGS:CGM ratios of 0, 33, 50, 66 and 100% were processed in a single screw extruder, which solely used dissipative heating, with a 2 mm circular die. Resulting screw speeds ranged from 216 to 228 rpm, and die exit temperatures ranged from 96 to 150oC. Blends containing DDGS were less uniformly consolidated and resulted in more dissipative heating. Blends showed multiple glass transitions, which is characteristic of mechanically compatible blends. Transmission electron microscopy revealed phase separation on a micro-scale, although distinct CGM or DDGS phases could not be identified. On a macro-scale, optical microscopy suggested that CGM-rich blends were better consolidated, supported by visual observations of a more continuous extrudate formed during extrusion. As with all biological materials, the extruded blends exhibited sorption behaviour over time, the magnitude of which varied according to blend ratio. EMC values ranged from approximately 0% to nearly 50%, depending upon the humidity level and blend ratio. Nonlinear regression was successfully used to model the effects of relative humidity and blend ratio on the equilibrium moisture contents, with a coefficient of determination of 99%. Future work should aim to also characterize the mechanical properties of these blends to assess their suitability as either bioplastic feedstock or pelletized livestock feed.

year: 2012

title: Visitors to Mauritius - Place, Perceptions and Determinants of Repeat Visitation

authors: Prayag, Girish

subjects: Mauritius

abstract: Tourism has long been recognised as a vital element of the economic development and growth of island destinations. This has been no different for the island of Mauritius, whose appeal is predominantly based on a sun, sand and sea product anchored in resort-based experiences. At the maturity stage of its destination life cycle, the island has embarked on product development and market diversification strategies for growth. In this respect, this study investigates cultural differences in image perceptions for the key generating markets of Mauritius and the factors determining repeat visitation. The relationship among several constructs such as destination image, service interactions, place attachment, personal involvement, satisfaction and future behaviour is explored. Understanding these relationships, can possibly improve segmentation, targeting, product development strategies and revisit intentions. Also, the role of interactions by visitors with hotel employees and how these influence other constructs such as place attachment and personal involvement have been of lesser interest to researchers. Therefore, a literature review on these relationships informs the construction of a theoretical model. Adopting a post-positivist stance, the qualitative component of the research focuses on exploring visitors‟ perceptions of image and service interactions using social constructionism. Personal construct theory informed the choice of a convenience sample of 103 visitors. Broad questions were designed within a phenomenological approach to allow participants to narrate their  lived‟ experiences. Thematic analysis was used to analyse the data and supplemented by content analysis using CATPAC to improve credibility of interpretation. The findings revealed that images are linked to motives for choice and in the case of Mauritius, fulfilment of needs for relaxation and escape as well as socialisation and learning determine visitors‟ perceptions. Service interactions are imbued in values such as integrity and respect, mutual understanding and authenticity of display. Place attachment as a latent dimension was related to the affective image of the place while personal involvement and familiarity influenced perceptions of service interactions. Nationality, ethnicity and language spoken had some influence on perceptions.
These findings informed the design of a survey instrument that was administered to a quota sample of 1000 visitors, of which, 705 were useable. The method of data collection
iii
was self- completion by hotel guests and self-completion in the presence of the researcher on beaches around hotels. Exploratory factor analysis was initially used to assess the dimensionality of the various constructs in the theoretical model, thereafter confirmatory factor analysis and structural equations modelling were undertaken to validate the model. Cluster analysis was used to identify different segments of visitors based on their level of personal involvement and place attachment. Regression models were developed to predict visitors overall image, satisfaction and loyalty as well as their propensity to be repeaters. The results indicated that destination image has both direct and an indirect influence over future behaviour. In particular, personal involvement and perceived service interactions are antecedents of destination image, while place attachment has motives for choice and personal involvement as antecedents. Given these relationships, important implications for destination image, product development as well as direction for destination marketing are offered. Implications for service providers are discussed and theoretical contributions of the study are highlighted.

text: Visitors to Mauritius - Place, Perceptions and Determinants of Repeat Visitation Tourism has long been recognised as a vital element of the economic development and growth of island destinations. This has been no different for the island of Mauritius, whose appeal is predominantly based on a sun, sand and sea product anchored in resort-based experiences. At the maturity stage of its destination life cycle, the island has embarked on product development and market diversification strategies for growth. In this respect, this study investigates cultural differences in image perceptions for the key generating markets of Mauritius and the factors determining repeat visitation. The relationship among several constructs such as destination image, service interactions, place attachment, personal involvement, satisfaction and future behaviour is explored. Understanding these relationships, can possibly improve segmentation, targeting, product development strategies and revisit intentions. Also, the role of interactions by visitors with hotel employees and how these influence other constructs such as place attachment and personal involvement have been of lesser interest to researchers. Therefore, a literature review on these relationships informs the construction of a theoretical model. Adopting a post-positivist stance, the qualitative component of the research focuses on exploring visitors‟ perceptions of image and service interactions using social constructionism. Personal construct theory informed the choice of a convenience sample of 103 visitors. Broad questions were designed within a phenomenological approach to allow participants to narrate their  lived‟ experiences. Thematic analysis was used to analyse the data and supplemented by content analysis using CATPAC to improve credibility of interpretation. The findings revealed that images are linked to motives for choice and in the case of Mauritius, fulfilment of needs for relaxation and escape as well as socialisation and learning determine visitors‟ perceptions. Service interactions are imbued in values such as integrity and respect, mutual understanding and authenticity of display. Place attachment as a latent dimension was related to the affective image of the place while personal involvement and familiarity influenced perceptions of service interactions. Nationality, ethnicity and language spoken had some influence on perceptions.
These findings informed the design of a survey instrument that was administered to a quota sample of 1000 visitors, of which, 705 were useable. The method of data collection
iii
was self- completion by hotel guests and self-completion in the presence of the researcher on beaches around hotels. Exploratory factor analysis was initially used to assess the dimensionality of the various constructs in the theoretical model, thereafter confirmatory factor analysis and structural equations modelling were undertaken to validate the model. Cluster analysis was used to identify different segments of visitors based on their level of personal involvement and place attachment. Regression models were developed to predict visitors overall image, satisfaction and loyalty as well as their propensity to be repeaters. The results indicated that destination image has both direct and an indirect influence over future behaviour. In particular, personal involvement and perceived service interactions are antecedents of destination image, while place attachment has motives for choice and personal involvement as antecedents. Given these relationships, important implications for destination image, product development as well as direction for destination marketing are offered. Implications for service providers are discussed and theoretical contributions of the study are highlighted.

year: 2009

title: Teachers' perceptions of the effectiveness of the Whānau Rūmaki teacher education programme, 1990-1992

authors: Kana, Fred

subjects: Maori Language

abstract: In 1990 the School of Education, the University of Waikato, initiated a special option within its regular pre-service teacher training programmes, an option designed to prepare teachers to deliver the New Zealand curriculum in bilingual and total immersion schools through the medium of te reo Māori. This alternative programmed, designated Whānau Rūmaki, was experimental and evolutionary. Inevitably particular elements of it had to be varied with each year's operation as its architects attempted 'to get the mix right'. It is difficult, however, when engaged in the day to day running of a programme, to stand back and review with any degree of objectivity its strengths and weaknesses. This study, therefore, in retrospect attempts to do three things: one, to follow the initial Whānau Rūmaki student cohort through its three or four year training cycle noting especially the difficulties confronting individual students some of whom dropped out of the programme; two, to gather information from as many as possible of the graduates who graduated about how well they felt they had been prepared for the rigours of classroom teaching; three, to be able, after analysing the data gathered, to recommend ways of improving the on-going Whānau Rūmaki programme.

text: Teachers' perceptions of the effectiveness of the Whānau Rūmaki teacher education programme, 1990-1992 In 1990 the School of Education, the University of Waikato, initiated a special option within its regular pre-service teacher training programmes, an option designed to prepare teachers to deliver the New Zealand curriculum in bilingual and total immersion schools through the medium of te reo Māori. This alternative programmed, designated Whānau Rūmaki, was experimental and evolutionary. Inevitably particular elements of it had to be varied with each year's operation as its architects attempted 'to get the mix right'. It is difficult, however, when engaged in the day to day running of a programme, to stand back and review with any degree of objectivity its strengths and weaknesses. This study, therefore, in retrospect attempts to do three things: one, to follow the initial Whānau Rūmaki student cohort through its three or four year training cycle noting especially the difficulties confronting individual students some of whom dropped out of the programme; two, to gather information from as many as possible of the graduates who graduated about how well they felt they had been prepared for the rigours of classroom teaching; three, to be able, after analysing the data gathered, to recommend ways of improving the on-going Whānau Rūmaki programme.

year: 1997