The electro-chemical activation of aqueous media is relatively new technology. The alkaline part of the activated media (catholyte) is used in a wide variety of applications due to outstanding detergency properties. The standard phosphate based detergents currently used by consumers cause a negative impact on the environment. Catholyte provides an environmental friendlier alternative as it returns to be neutral water within 48 hours after activation. Although catholyte may be an environmentally friendly medium for washing, the influence that it has on the properties of textile materials, for example wool and polyamide is still only based upon speculation. Little is also known about the soil removal efficiency of this medium on wool and polyamide. The aim of this study was to evaluate electro-chemically activated water (catholyte) as an alternative detergent for machine washable wool and polyamide 6,6. This was done by determining the influence of catholyte on certain important properties of these textile fabrics as well as the soil removal efficiency. The machine washable wool and polyamide 6,6 textile fabrics were laundered at 30°C and 40°C with catholyte, phosphate detergent or distilled water for five, ten, twenty or fifty laundering cycles respectively. The standard test methods for laundering (AATCC 61) and measuring the tearing strength (ASTM D1424), tensile strength (ISO/SANS 13934-1), wrinkle recovery (AATCC 66), bending length (BS 3356), soil removal (AATCC 135) and dimensional change were used. Analysis of variance (ANOVA) was used for the statistical interpretation of the results obtained. Catholyte, detergent and distilled water caused a significant decrease in the tearing strength of both the polyamide 6,6 and wool fabrics. The temperature had no significant influence on the tearing strength of polyamide 6,6 fabric although it caused a significant decrease in the tearing strength of wool. The number of laundering cycles caused a significant decrease in the tearing strength of the warp yarns of polyamide 6,6 as well as the weft and warp yarns of wool, however it did not have a significant influence on the weft yarns of polyamide 6,6. Catholyte, detergent and distilled water as well as the temperature and number of laundering cycles did not have a significant influence on the tensile strength on the weft yarns of the polyamide 6,6. It did however cause a significant decrease in tensile strength of the warp yarns of polyamide 6,6 and the weft and warp yarns of wool. Catholyte, detergent and distilled water as well as the temperature and number of laundering cycles had a significant influence on the bending length (stiffness) of polyamide 6,6 and wool, causing the fabric to become stiffer. Catholyte, detergent and distilled water caused a significant increase in the wrinkle recovery in the weft of polyamide 6,6 and decrease in wrinkle recovery in the weft of wool. It did not have a significant influence in the warp of wool and polyamide 6,6. The temperature had no significant influence on the wrinkle recovery of the wool and weft of polyamide, although it caused a significant fluctuation in the warp of polyamide 6,6. The number of laundering cycles caused a significant fluctuation in the wrinkle recovery of the polyamide 6,6 and wool fabrics. Catholyte, detergent and distilled water, as well as the temperature and number of laundering cycles did not have a significant influence on the dimensional stability of polyamide 6,6. It did however cause the wool fabric to shrink significantly. Catholyte and detergent proved to be significantly effective in removing soil from polyamide 6,6 and wool. The temperature only had a significant influence on soil removal from the wool.

Water and energy are used in the domestic laundering processes for optimum soil and stain removal. Water and energy conservation are important issues in the quest for more environment friendly household practices. Washing machines have been invented as household gadgets making laundry easier and faster. Common types of washing machine include top loaders, front loaders and twin tubs. Literature indicate that top loaders use less electricity but more water and front loaders use less water but more electricity. However efficient soil removal is the main concern of the consumer. The purpose of the study was to determine water, energy and soil removal efficiency of a top loader and a front loader washing machine. A quantitative research strategy was used and controlled experiments were conducted in order to attain accurate data. An 8.0 kg capacity top loader and an 8.5 kg capacity front loader of the same manufacturer were purchased. The âdaily wash programâ and the âquick wash programâ of both machines were selected as wash programs for the project. Cold wash (water at room temperature) was used for the top loader and cold wash, 30 °C, 40 °C and 60 °C for the front loader. A 5kg load of 3 samples of C-09 cotton (soiled with pigment oil, purchased from CFT) and cotton filler cloths were used for each wash cycle and each cycle repeated three times. The efficiency of the machines and programs to remove stains were tested on the following stains: CS-103 red wine, CS-12 blackcurrant, CS-BC-03 tea, C-BC-02 coffee, CS-28 rice starch, CS-26 corn starch, CS-6 dressing, CS-73 locust bean gum, CS-54 oatmeal/chocolate, CS-38 egg yolk/pigment, CS-01 blood, C-05 blood/milk/ink, CS-08 grass, CS-02 cocoa, C-10 pigment/oil/milk, C-02 olive oil/soot, CS-32 sebum bey, CS-17 make-up and CS-216 lipstick. 60g Non phosphate ECE reference detergent without optical brightener was used. Redeposition of soil was determined on CN-11 white cotton. The drained water was collected and measured in litres. The energy consumption was measured in watt-hour in every program. Soil removal was measured with a colorimeter in CIE L*a*b* colour scale (AATCC test method 61-2010) and an analysis of variance was used to aid in the interpretation of the data. The results of the study indicate that, the top loader used more water than the front loader. The daily wash used more water than the quick wash in both the top loader and front loader. The front loader used more energy than the top loader at cold wash. More energy was used in the daily wash than quick wash of the front loader. It was also evident that the daily wash program in both machines was more efficient in soil and stain removal than the quick wash. At cold wash the daily wash was more efficient in soil and stain removal than the quick wash program but at 60 °C there was no difference in the rate of stain removal in both the quick and daily wash programs. The best soil and stain removal was observed at 60 °C in both the quick and daily programs. The top loader machine used more water, less energy and removed less soil and stain. It was also evident that, the front loader washing machine is more efficient in soil and stain removal and it uses less water but it uses more energy than the top loader machine.

Textile materials are usually treated with chemicals like sodium hypochlorite and high temperatures to ensure sterility. This poses two potential problems: (1) it has a negative effect on strength properties of the textile fabric; (2) the harmful chemicals are discarded into the environment. Therefore, better and safer methods need to be investigated. A process has been developed where electro-chemically activated water (Anolyte) is produced by an anode-cathode system and the process is described as a change of the molecular state of the water. After production, the Anolyte exists in a metastable state while containing many free radicals and a variety of molecules and a very high oxidation-reduction potential. It returns to a stable state after 48 hours and become inactive again and, therefore, it is not a threat to the environment when discarded after use. Anolyte has been shown to be an effective disinfection agent in other areas such as the food industry. The aim of this study was to determine if Anolyte could reduce E. coli and Staph. aureus on textiles to the same extent as sodium hypochlorite and be effective without implementing such high temperatures. The influence of the Anolyte on textile material should also be evaluated to ensure that it could be used without damaging textile materials more than the currently used disinfection agents. The antimicrobial effect of the Anolyte was determined by contaminating cotton, polyester and polyester/cotton fabric swatches with E. coli and Staph. aureus, respectively. Survival was determined after laundering with the respective wash liquors. AATCC Test Method 61- 2009 was used with the LaunderOmeter. Wash liquors included filtered water, phosphate reference detergent B, sodium hypochlorite and Anolyte. Temperatures were maintained at 24, 30 or 60°C. The cotton, polyester/cotton and polyester were laundered for 5, 10 or 20 cycles respectively for the evaluation of the influence on tensile strength and tearing strength. The tensile strength tests were conducted with the Instron Tensile Tester and ISO/SANS 13934-1:1999 test method. The tearing strength tests were conducted with the Elmendorf Tearing Strength tester as per ASTM Test Method D 1424 - 63. The results indicated that Anolyte destroyed all E. coli and Staph. aureus on all the fabrics regardless of the temperature. The effect of the other agents were enhanced by the increasing temperature, but after laundering at 60°C no survival was found as a result of the high temperature. The Anolyte did not influence the strength properties of the cotton, polyester and polyester/cotton fabrics to a larger extent than the detergent or sodium hypochlorite solution. An increase in maximum load required to break the fabric and displacement at maximum load was found for the cotton and polyester/cotton fabrics after laundering treatments, while a decrease was caused after laundering of the polyester fabric. A decrease in tearing strength of all the fabrics was found after laundering with the treatments. The Anolyte also did not affect the dimensional stability of the fabrics. It could be concluded that the Anolyte is a viable alternative to currently used sodium hypochlorite, while it is effective at low temperatures. The Anolyte do not affect the textile fabrics more negatively than the detergent and sodium hypochlorite combination, and could, therefore, be a successful alternative.

Thesis(PhD)--University of Stellenbosch, 2006. / Professional socialisation can be described as a subconscious process whereby persons internalise behavioural norms and standards and form a sense of identity and commitment to a professional field. The primary goal of professional socialisation is considered to be internalisation of the professional culture and the development of a professional identity. It is learned through interaction with professionals and educators during a student’s education. It is a continuous, life-long process of learning formal knowledge, skills and rules, as well as informal and tacit knowledge, norms, values and loyalties within the profession. An understanding of the professional socialisation process is vital to all persons involved in postsecondary education, for it is the professional socialisation process that allows education to achieve its goals. This dissertation determined whether students of Family Ecology and Consumer Sciences in South Africa are professionally socialised into developing a professional identity within the Family Ecology and Consumer Sciences profession. The objectives of the research included; to examine through a literature review the development of the profession and to propose a new position for the profession in South Africa; to identify the factors that influenced South African students when they decided on Family Ecology and Consumer Science as a field of study and the factors that influenced them while they were obtaining their degree at a South African university; to determine whether Family Ecology and Consumer Science students evidence the developmental stages of the Cohen model of the professional socialisation process; to determine Family Ecology and Consumer Science professionals’ perceptions of their professional preparation environments; and to analyse and compare Family Ecology and Consumer Science programmes at South African universities. A quantitative research methodology in the form of an analytical survey was undertaken with the participation of students and staff at South African universities where Family Ecology and Consumer Science programmes are offered by means of postal questionnaires. Three questionnaires were used in the research, namely; the Professional Socialisation Influences (PSI) questionnaire; the Professional Socialisation Staging Scale (PS3) questionnaire; and the Emphases, Process and Influences on the Professional Preparation Programmes questionnaire. A conceptual framework was used to compare the Family Ecology and Consumer Science professional preparation programmes presented at South African universities.. Descriptive statistics and the factor analysis method were used to examine the objectives to determine which factors influenced students to select Family Ecology and Consumer Sciences and the factors that influenced them while they were studying for a degree at a South African university. Descriptive statistics, ANOVA and Bonferroni Post-Hoc tests were used to examine whether Family Ecology and Consumer Science students evidenced the developmental stages of the Cohen model of the professional socialisation process. Descriptive statistics were used to examine Family Ecology and Consumer Science professionals’ perceptions of their professional preparation environments. The main findings drawn from the study indicated that Family Ecology and Consumer Sciences students, when selecting Family Ecology and Consumer Science as a profession, were influenced by the ‘Service Ideal’ and ‘Entrepreneurial’ factors. Aspects that elicited the highest percentage of positive responses from the respondents were; ‘desire to help others’; ‘a desire to improve the quality of family living’; ‘a desire to help people learn to do things’; and ‘entrepreneurial possibilities of the course’. While studying for a degree in Family Ecology and Consumer Science, they were influenced by the factors ‘Student Interaction’ and ‘Departmental Influences’. Aspects such as; ‘career opportunities available’; ‘application of what I learned to my personal life’; and ‘employment opportunities available’; were those that had the biggest influence.

Thesis (MVerbruikerswet)--University of Stellenbosch, 2005. / ENGLISH ABSTRACT: The aim of the study was to investigate the compatibility of cotton/nylon and cotton/polyester warpknit terry towelling fabrics with industrial laundering procedures. The literature review focused, on the one hand, on the manufacture, finishing and structure of warp-knit terry towelling fabrics as well as on the physical structure, chemical nature and characteristics of the textile fibres used in the manufacturing of the towelling. On the other hand, a full exposition of the industrial laundering processes is provided, with specific reference to aspects that can have an effect on the towelling fabrics during the wash and tumble-drying cycles. Chapters Three and Four are reports on two research projects that can each be read independently. The aim of the first project was to determine the effect of industrial laundering procedures on the durability of cotton warp-knit terry towelling fabrics with a synthetic base structure. The tensile strength of cotton warp-knit terry towelling samples with a synthetic base structure was determined in the warp and weft directions and after 10, 20, 30, 40, and 50 wash cycles as well as wash and tumble-drying cycles. The tensile strengths in the warp direction of the washed terry towelling samples decreased significantly (p < 0.001) after 50 wash cycles. In contrast to this, the tensile strength in the weft direction increased, although not significantly (p > 0.05). As far as the comparison of the effect of industrial wash and wash and tumble-drying cycles is concerned, the tensile strengths in the warp direction of the towelling samples that were washed and washed/tumble-dried, were significantly lower (p < 0.001) after 20 and after 50 laundering cycles. As far as the tensile strengths in the weft direction were concerned, a similar pattern as with the wash and wash/tumble-drying processes, occurred. The tensile strengths initially increased and then gradually decreased. Furthermore, the tumble-drying process had greater damaging effects after 40 laundering cycles (p = 0.043) and especially after 50 laundering cycles (p < 0.0001). The aim of the second research project was to compare the durability of cotton warp-knit terry towelling fabrics with a nylon base structure with cotton warp-knit terry towelling fabrics with a polyester base structure after they had been subjected to industrial laundering processes. It was first established whether cotton/nylon and cotton/polyester warp-knit terry towelling fabrics are comparable. Secondly, the durability of cotton/nylon and cotton/polyester terry towelling fabrics was compared by determining the tensile strengths of the samples in the warp direction after they have been subjected to 50 industrial wash as well as wash and tumble-drying cycles. The two groups of untreated samples were regarded as similar on the basis of the percentage of fibre composition, knit fabric structure, knit density, mass and tensile strength. After 50 industrial wash cycles the tensile strengths of the cotton/nylon and cotton/polyester warp-knit terry towelling samples decreased significantly (p < 0.05). But there was no significant difference (p > 0.05) between the tensile strengths of the cotton/nylon and the cotton/polyester terry towelling samples after 50 washing cycles. There was a highly significant difference (p < 0.001) between the tensile strengths of the cotton/nylon and the cotton/polyester terry towelling samples after 50 wash and tumble-drying cycles. The tensile strength of the cotton/polyester terry towelling samples remained practically unchanged after the 50 wash/tumble-drying cycles, with the tensile strength of the cotton/nylon terry towelling samples decreased significantly (p < 0.001). / AFRIKAANSE OPSOMMING: Die doel van die studie was om ondersoek in te stel na die versoenbaarheid van katoen/nylon- en katoen/poliëster- skeringgebreide terriestofhanddoeke met industriële versorgingsprosedures. In die literatuuroorsig is daar enersyds gefokus op die vervaardiging, afwerking en struktuur van skeringgebreide terriehanddoekstowwe asook op die fisiese struktuur, chemiese aard en eienskappe van die tekstielvesels waarvan die handdoeke vervaardig is. Andersyds is ’n volledige uiteensetting van industriële versorgingsprosedures gegee, met spesifieke verwysing na aspekte wat tydens die was- en tuimeldrogingsiklusse ’n uitwerking op die handdoekstowwe kan hê. Hoofstukke drie en vier is opgeskryf as twee navorsingsprojekte wat elk ‘n geheel vorm. Die doel van die eerste projek was om die effek van industriële versorgingsprosedures op die duursaamheid van katoen skeringgebreide terriestofhanddoeke met ‘n sintetiese basisstruktuur te bepaal. Die breeksterkte van katoen skeringgebreide terriestofmonsters met ’n sintetiese basisstruktuur is in die skering- en inslagrigtings tydens en na afloop van 10, 20, 30, 40, en 50 was- asook was- en tuimeldrogingsiklusse bepaal. Die breeksterktes in die skeringrigting van die gewaste terriestofmonsters het betekenisvol afgeneem (p < 0.001) na 50 wassiklusse. In teenstelling hiermee het die breeksterktes in die inslagrigting toegeneem, hoewel nie betekenisvol nie (p > 0.05). Wat die vergelyking van die effek van industriële was- en was en tuimeldrogingsiklusse betref, is die breeksterktes in die skeringrigting van die handdoekmonsters wat gewas en gewas/getuimeldroog is, beduidend laer (p < 0.001) na 20 en na 50 versorgingsiklusse. Wat die breeksterktes in die inslagrigting betref het ‘n soortgelyke patroon by die was- en was/tuimeldrogingprosesse voorgekom. Die breeksterktes neem aanvanklik toe en daarna geleidelik af. Verder het die tuimeldrogingsproses na 40 versorgingsiklusse (p = 0.043) en veral na 50 versorgingsiklusse (p < 0.0001) ’n groter skadelike effek getoon. Die doel van die tweede navorsingsprojek was om die duursaamheid van katoen skeringgebreide terriestowwe met ’n nylon basisstruktuur te vergelyk met katoen skeringgebreide terriestowwe met ’n poliëster basisstruktuur nadat dit aan industriële versorgingsprosedures blootgestel is. Daar is eerstens vasgestel of katoen/nylon en katoen/poliëster terriehanddoekstowwe vergelykbaar is. Tweedens is die duursaamheid van katoen/nylon en katoen/poliëster terriestowwe vergelyk deur die breeksterktes van die monsters in die skeringrigting te bepaal nadat dit aan 50 industriële wasasook was- en tuimeldrogingsiklusse blootgestel is. Die twee groepe onbehandelde monsters is as soortgelyk beskou op grond van die persentasie veselsamestelling, breistofstruktuur, breidigtheid, massa en breeksterkte. Na 50 industriële wassiklusse het die breeksterktes van die katoen/nylon en katoen/poliëster skeringgebreide terriestofmonsters betekenisvol (p < 0.05) afgeneem. Daar was egter nie ’n betekenisvolle verskil (p > 0.05) tussen die breeksterktes van die katoen/nylon en katoen/poliëster terriestofmonsters na 50 wassiklusse nie. Daar was ’n hoogs betekenisvolle verskil (p < 0.001) tussen die breeksterktes van die katoen/nylon en katoen/poliëster terriestofmonsters na die 50 was/tuimeldrogingsiklusse. Die breeksterkte van die katoen/poliëster terriestofmonsters het na die 50 was/tuimeldrogingsiklusse feitlik onveranderd gebly terwyl die breeksterkte van die katoen/nylon terriestofmonsters hoogs betekenisvol (p < 0.001) afgeneem het.

Thesis (MSc)--University of Stellenbosch, 2005. / ENGLISH ABSTRACT: Pasta manufacturing is a process whereby wheat flour is converted into a shelf-stable food that is more desirable than native wheat flour. It can be fortified and may serve as a valuable source of nutrition in developing countries. Quality measures are of importance in the production process to ensure a consistent and acceptable finished product. Literature provides information on many aspects of wheat types, milling techniques and processing of pasta. Protein content and quality of cultivated wheat varieties is of major importance to produce quality pasta products. Wheat types of lower protein content are more readily available than traditionally used durum wheat. As in all food products, the cost of final products is of major importance. Bread wheat is generally less expensive than durum wheat. However, product quality (and thus acceptability) may be lower. Direct measurements of product quality are currently limited to protein content, moisture content, colour analyses and certain other characteristics measurable in a laboratory, for example mechanical strength and firmness. Direct measurements of defects that may affect final product quality, such as cracks and fissures on the strands of spaghetti, different types of spots and lines on the strands, broken units, units sticking together and odd shapes are not well documented. During the first part of this study, spaghetti quality evaluation techniques were reviewed, improved or developed and thereafter standardised. This developmental research was conducted to establish valid and reliable measures (with a high degree of repeatability) for the evaluation of dry and cooked pasta quality characteristics. A wide variety of available products on the South African market were evaluated for different quality characteristics. From this evaluation standards were drawn up, tested for validity and reliability by means of repeatability. Minimum sample sizes for the evaluation of different quality characteristics were calculated and presented in the study, together with reference photographs that can be used to evaluate spaghetti. This study found that colour evaluation by means of commercially available apparatus needs revision. This study suggests the use of multiple layers when evaluating translucent food products for colour. The occurrence of fissures and flour spots are of importance for the quality of the final product. This study provides a set of valid and reliable measurements for measuring the quality of dry and cooked spaghetti. Simple techniques can therefore be used to detect the presence or absence of these defects. Thereafter an empirical study was conducted to describe the differences between spaghetti prepared from durum and non-durum wheat, dried at different temperatures and at different relative humidity. Spaghetti samples of diverse perceived quality, from different manufacturers, were purchased and evaluated. Standard methods and the newly developed testing methods were used to test whether these methods effectively distinguish between spaghetti of diverse quality, reflecting on the validity of the methods. Correlations were calculated between dependent and independent variables in an attempt to find possible explanations for certain defects or quality differences, and to test certain theories in the literature. Certain relationships between quality characteristics were found, while others were questioned. The most important proven relationships were between protein content and its effects on reducing quality defects such as fissures, breakages and cooking losses. The relationship between ash content and spaghetti colour could not be confirmed in this study. This study confirmed that protein remains one of the most important variables to ensure consistent quality spaghetti. / AFRIKAANSE OPSOMMING: Pastavervaardiging is ‘n proses waartydens koring meel omskep word in a produk met ‘n stabiele en lang rakleeftyd wat meer gewens is as die oorspronklike koring meel. Pasta kan gefortifiseer word and kan dien as a waardevolle voedingsbron in ontwikkelende lande. Om ‘n konstante en aanvaarbaare finale produk te verseker is kwaliteitmetings gedurende die produksie proses belangrik. Die literatuur voorsien heelwat inligting rakende aspekte van belang vir pastakwaliteit, byvoorbeeld koringtipes, maaltegnieke en die vervaardigingsproses. Proteïninhoud en die kwaliteit daarvan is van groot belang tydens die produksie van hoë kwaliteit pasta. Koringtipes met ‘n laer proteïninhoud is meer geredelik beskikbaar as tradisionele durumkoring. Soos met alle voedselprodukte, is die koste van die finale produk van groot belang. Oor die algemeen verhandel broodkoring teen laer pryse as durumkoring. Die produkkwaliteit en aanvaarbaarheid van pasta vervaardig van broodkoring kan egter laer wees as dié van durumkoring. Direkte metings van produkkwalitiet is tans beperk tot proteïninhoud, voginhoud, kleuranalise en sekere eienskappe meetbaar in ‘n laboratorium, byvoorbeeld meganiese sterkte en fermheid. Die direkte meting van defekte wat finale produkkwaliteit kan beïnvloed, byvoorbeeld barste, krake, meel kolletjies, strepe op spaghetti-eenhede, gebreekte eenhede, eenhede wat aan mekaar kleef en ongewone vorms, is nie goed gedokumenteer nie. Gedurende die eerste gedeelte van hierdie studie, is ‘n oorsig van spaghetti evaluasie tegnieke beskikbaar in die literatuur gdoen, waarna sekeres verbeter is, ander ontwikkel is en finaal gestandariseer is. Hierdie navorsing is uitgevoer om geldige en betroubare metings (met ‘n hoë graad van herhaalbaarheid) vir die evaluasie van droë- en gaar pastakwalitietseienskappe vas te stel. ‘n Wye verskeidenheid van produkte beskikbaar op die Suid-Afrikaanse mark is ge-evalueer ten opsigte van verskillende kwaliteitseienskappe. Vanuit hierdie evaluasies is standaarde saamgestel en getoets vir geldigheid en betroubaarheid deur middel van herhaalbaarheid. ‘n Minimum steekproefgrootte per kwaliteitseienskap is bereken en word vermeld in hierdie studie. Daarmeesaam word verwysingsfoto’s aangebied wat gebruik kan word tydens die evaluasie van spaghetti. Hierdie studie bied a stel geldige en betroubare meting vir die kwaliteit van droe en gaan spaghetti. Eenvoudige tegnieke kan dus gebruik word om die voorkoms van hierdie defekte te meet. Met afloop van die verkennende studie, is ‘n empiriese studie gedoen om die verskille te beskryf tussen pasta vervaardig van durum en brood koring, gedroog teen verskillende temperature en relatiewe humiditeit. Spaghettimonsters met oënskynlike diverse kwaliteit, vervaardig deur verskillende maatskappye, is aangekoop en ge-evalueer. Standaardmetings en nuutontwerpte metings is gebruik om te bevestig of die metings kan onderskei tussen spaghetti met uiteenlopende kwaliteit, wat reflekteer op die geldigheid van die metingsmetodes. Korrelasies is bereken tussen afhanklike en onafhanklike veranderlikes in ‘n poging om moontlike verklarings vir sekere defekte of kwaliteitsverskille te vind, en ook om sekere teoriëe in die literatuur te toets. Die verband tussen sekere kwaliteitseienskappe is bevestig en bewys, terwyl ander bevraagteken was. Die mees belangrike verband was proteïninhoud en die effek daarvan om die voorkoms van defekte, soos barste, gebreekte eenhede en kookverliese te verlaag. Die verband tussen asinhoud en spaghettikleur kon nie in hierdie studie bevestig word nie. Hierdie studie het bevestig dat proteïn die mees belangrike veranderlike is wat oorweeg moet word wanneer ‘n konstante hoë kwaliteit spaghettiproduk vervaardig word. Kleurevaluasie met behulp van kommersieel-beskikbare apparaat vereis hersiening. Hierdie studie stel voor dat tydens kleur evaluasie van voedsel wat lig deurlaatbaar is, dit in veelvoudige lae evalueer moet word. Die voorkoms van defekte soos barste, krake of meel kolletjies is van belang ten opsigte van finale produkkwaliteit. Hierdie studie bied riglyne vir die evaluasie van die genoemde defekte. Die voorkoms van hierdie defekte is van groter belang as die graad waarteen die defek voorkom. Eenvoudige tegnieke kan vervolgens gebruik word om die teenwoordigheid of afwesigheid van hierdie defekte te bepaal.

Thesis (MSc (Consumer Science)--Stellenbosch University, 2008. / The purpose of this study was to investigate the chemical composition mineral and cholesterol content of the different cuts (breast, drumstick and thigh) of raw guinea fowl meat. The study also aimed at establishing the effect of cooking method on guinea fowl quality attributes by investigating the effect of different cooking methods on the chemical composition and sensory attributes of the different cuts. The effect of injecting a brine solution on the chemical composition and sensory attributes were also investigated. There were no differences in terms of moisture content of the various cuts raw guinea fowl meat The breast had significantly higher protein content when compared to drumstick and thigh (P<0.05). The fat content was similar for all the cuts (P>0.05). Whilst the drumstick had significantly the lowest value for ash content when compared to the thigh. Saturated fatty acids (SFAs) and total unsaturated fatty acids (TUFAs) were not different (P>0.05) in all the cuts. Drumstick had significantly higher monounsaturated fatty acids compared to other cuts (P<0.05), and it had the highest polyunsaturated fatty acids (P<0.05). The breast had the lowest (P<0.05) n-6 fatty acid value (44.25) and had relatively the lowest Polyunsaturated:Saturated (P:S) fatty acid ratio of 1.74 when compared to the other cuts. High n-6:n-3 ratios, ranging from 7.05 to 16.58, were also found in all the cuts. Cholesterol was lowest (P<0.05) in the breast. Seventeen amino acids were found, including the eight of the nine essential amino acids. Significant differences were found in amino acid values for the different cuts. Values of iron were significantly higher in the drumstick and thigh cuts (P<0.05), whilst drumstick had the highest zinc content of all the cuts (P<0.05). On investigating the effect of three cooking methods (baking-bag, foil-wrap, open-roasting at 140ºC for 65 minutes) on the chemical composition, the open-roasting method produced higher moisture content (P<0.05) consistently for all cuts, with the breast having the highest and the drumstick the lowest (P<0.05). The moisture content of the baking-bag method on the other hand was consistently the lowest (P>0.05). This effect was significant for the breast, which had lost the most moisture (P<0.05). The baking-bag method consistently resulted in a higher protein content, which is attributed to the higher moisture loss (P<0.05) in comparison with the other methods, resulting in a more concentrated product. With regard to the fat content no effect resulting from the cooking methods could be observed (P>0.05), but the cuts’ natural fat content was reflected especially in the open–roasting method (P<0.05) giving further support to the understanding that the open-roasting method indeed made the least inroads on the chemical composition of guinea fowl meat under these restraints: controlled for cooking time and temperature, internal temperature not controlled. All the cuts cooked according to all the methods, had the favourable >0.4 Polyunsaturated:Saturated fatty acids (P:S) ratio, ranging from 0.91 to 1.42 between cuts and treatments. The n-6:n-3 ratio was below the recommended beneficial value, namely <4:1, in all the cuts irrespective of all the cooking methods, ranging from 2.47 to 3.08. The study of the effect of the three cooking methods (baking-bag, foil-wrap and open-roast) on the sensory attributes of the breast meat revealed that aroma-intensity of the three cooking treatments did not differ significantly (P>0.05). Foil-wrap produced a more tender and juicier product (P<0.05), while, when using the baking-bag method, values for flavour decreased (P<0.05). It is proposed that a higher internal temperature (which was not controlled) was attained when using the baking-bag method (temperature and time controlled) resulting in loss of volatile flavour components. The effect of the three cooking methods (baking-bag, foil-wrap and open-roast) on the proximate composition (moisture, protein, fat and ash) of raw and cooked breast meat was investigated. As anticipated raw breast meat had higher moisture content (74.55%, P<0.05) than the cooked cuts, with open-roasting showing the highest (68.55%) value and foil-wrap close second (68.12%). These values differed significantly from the baking-bag method (66.06%, P<0.05). An investigation on the effect of brine infusion on the sensory attributes and chemical composition (proximate and fatty acid composition, and mineral content) of breast meat, baked in foil-wrap, was carried out using descriptive sensory analysis with the injected breast and the control as variable. There were no significant differences (P>0.05) between the injected and the control samples for any of the sensory attributes of aroma, tenderness, initial juiciness, sustained juiciness and flavour. Judge:treatment variations were observed for all the attributes, and samples differed for all attributes except for aroma. It is proposed that the use of the hand injector could not effectively distribute the brine solution, hence the recommendation to repeat the experiment using an electronic multineedle-injector. No effect was observed for the proximate composition (P>0.05). Further research pertaining to cooking methods of meat of free-range guinea fowl is recommended to address certain issues that have been highlighted.

The purpose of the study was to investigate why high school junior and senior students in the Jackson Purchase district of Kentucky choose to go or not to go into the profession of teaching Family and Consumer Sciences. The participants of the study were Family and Consumer Sciences teachers and junior and senior high school students enrolled in their classes. This study used a quantitative mode of inquiry. More specifically, two questionnaire instruments were developed and administered to participating teachers and students to answer the research questions. The questionnaire gathered data on the subject's perceptions of Family and Consumer Sciences education. In addition, demographics were derived from student participants. The study determined that students were predominantly college bound, mostly Caucasian, seniors, and female. The majority of students thought Family and Consumer Sciences was important and should be offered in high school. In addition, only 9.3% (10) have considered Family and Consumer Sciences education as a career, 63.7% have never thought of it as a possible career, and 17.8% indicated there was not enough available jobs. The study determined that most of the Family and Consumer Sciences teacher participants declared there was not a decline in enrollment in classes over the past ten years. Two of the seven teachers will be retiring within the next five years.

Thesis (DSc (Consumer Science)--University of Stellenbosch, 2006. / 326 leaves on CD format, preliminary i-xix pages and numbered pages 1-210. Includes bibliography, list of tables, figures and appendixes. / ENGLISH ABSTRACT: This research focused on the need of the children’s wear industry in South Africa for sizing systems based on accurate and current body measurement tables developed from the actual measurements of children. The broad objective of this study was to develop standardised measuring methodologies and techniques which would be relevant to the subsequent development of reliable, accurate and comprehensive body measurement tables. These tables could then be implemented as a basis for the development of new sizing systems, as well as new, improved and authentic fit dummy ranges. The literature study served as a point of departure for the planning and execution of the empirical study, focusing on sizing and size designation systems. The study population comprised children representative of three categories, namely age (2 to 14 years), gender (boys and girls) and sector (Black and Non-Black) categories. A convenience sample was selected, representing children from two geographical areas (Western Cape and Gauteng). The empirical study has a three phase structure. The first pilot study aimed at developing standardised measuring equipment, as well as the methodologies and properly recorded guidelines for their implementation. The specific standards according to which subjects were measured and the strict quality control measures implemented to ensure the validity, reliability and accuracy of recorded data, were confirmed during the second pilot study. Based on this, the final study was executed following the guidelines as recorded in the Field Worker Manual. The statistical analysis was done after data capturing during which the data sets were first cleaned up. Secondly, the key measurements for use as a basis for the development of the sizing systems were identified. Based on these, body measurement tables were compiled and age of gender split and growth patterns were analysed for fit dummy prototype development. The new size designation system developed for children’s clothing was successfully implemented as a multi-indicator system, linking height ranges with both age ranges and numerical size indicators. The development of the subsequent new and improved fit dummy prototypes was based on measurements within minimum and maximum values of the body measurements, in order to facilitate the construction of these three-dimensional bodies. It was also possible to develop complete body measurement tables with accurate, and notably irregular, increments between sizes as well as to determine specific growth patterns and separate growth spurts for both boys and girls. This study made new and original as well as more detailed and correct information available concerning the size and shape of the typical South African children’s wear consumer. Using the information contained in the new height based sizing system, retailers have been able to develop a proper set of grade rules for application in product development. The identification and demarcation of important body landmarks facilitated pattern drafting, garment development and fit assessments, resulting in an improved product offering for the typical South African children’s wear consumer. Recommendations regarding further research were formulated, such as comparing the study population categories, namely gender, age and sector. Implications for retailers, inter alia that each retail company could choose how to implement the new height based sizing system and the specific size designation system most suitably for their own consumers and internal systems. The standards set and methodologies implemented in this survey were an improvement on the sizing and fit of children’s wear in the context of South African manufacturers, retailers and consumers. / AFRIKAANSE OPSOMMING: Hierdie navorsing fokus op die behoefte van die Suid-Afrikaanse kinderklerekleinhandelbedryf aan ‘n sisteem van kleregroottes, gebaseer op akkurate en huidige liggaamsmate-tabelle wat ontwikkel is van die werklike mates van kinders. Die oorkoepelende doelstelling van hierdie studie was om gestandaardiseerde meetmetodologieë en -tegnieke te ontwikkel wat relevant is vir die daarstelling van betroubare, akkurate en omvattende liggaamsmate-tabelle, wat dan gebruik kan word as basis vir die nuwe kleregroottesisteem, sowel as om nuwe, verbeterde en oorspronklike figuurmodelreekse te ontwikkel. Die literatuurstudie het gedien as vertrekpunt vir die beplanning en uitvoering van die empiriese studie met die fokus op kleregroottesisteme en kleregrootteaanwysingsisteme. Die kinders in die studiepopulasie het drie kategorieë verteenwoordig: ouderdom (2 tot 14 jaar), geslag (seuns en meisies) en sektor (Swart en Nie-Swart). ‘n Gerieflikheidsteekproef is uit twee geografiese areas (Wes-Kaap en Gauteng) gekies. Die empiriese studie het ‘n drie-fase-struktuur. Die eerste loodsstudie het ten doel gehad om gestandaardiseerde meettoerusting, meetmetodologieë en behoorlik aangetekende implementeringsriglyne daar te stel. Die spesifieke standaarde waarvolgens die proefpersone gemeet is en die implementering van streng kwaliteitbeheermaatreëls wat geldige, betroubare en akkuraat vasgelegde data verseker, is tydens die tweede loodsstudie bevestig. Die finale studie is gebaseer op en uitgevoer volgens die riglyne soos uiteengesit in die Field Worker Manual. Die statistiese analise is gedoen nadat die data vasgelê en skoongemaak is. Vervolgens is sleutelmates geïdentifiseer wat as basis vir die ontwikkeling van kleregroottesisteme kan dien. Volledige liggaamsmate-tabelle is daarna ontwikkel. Die identifisering van die geslagverdelingsouderdom, sowel as die analisering van groeipatrone vir die ontwikkeling van figuurmodelle, is hierop gebaseer. Die nuwe klere-aanwysingsisteme wat ontwikkel is vir kinderklere is suksesvol geïmplementeer as ‘n veelvoudige aanwysingsisteem wat liggaamslengtereekse met ouderdomsreekse en numeriese grootte-aanwysers koppel. Die nuwe en verbeterde figuurmodel-prototipes wat vervolgens ontwikkel is, is gebaseer op minimum en maksimum waardes van die liggaamsmates ten einde die konstruksie van die driedimensionele figure te vergemaklik. Daarbenewens was dit moontlik om volledige liggaamsmate-tabelle met akkurate en opmerklik ongelyke inkremente tussen groottes daar te stel, sowel as om die spesifieke groeipatrone en afsonderlike groeitoenames vir beide seuns en meises te bepaal. Die studie het nuwe en oorspronklike, sowel as meer gedetailleerde en korrekte inligting ten opsigte van die grootte en vorm van die tipiese Suid-Afrikaanse kinderklereverbruiker beskikbaar gestel. Met hierdie nuwe kennis van die liggaamslengte-gebaseerde kleregroottesisteem, is dit nou vir kleinhandelaars moontlik om ‘n volledige stel graderingsreëls daar te stel en in produkontwikkeling toe te pas. Die identifikasie en afbakening van belangrike liggaamsbakens vergemaklik patroon- en klereontwikkeling sowel as die evaluering van die mate waarin dit pas; dit waarborg ‘n verbeterde produk vir die tipiese Suid-Afrikaanse kinderklereverbruiker. Aanbevelings vir verdere navorsing is gemaak, soos ‘n vergelyking van die studiepopulasiekategorieë, naamlik geslag, ouderdom en sektor. Die implikasies vir kleinhandelaars is onder meer dat elke kleinhandelaar kan kies hoe om hierdie nuwe liggaamslengte-gebaseerde kleregroottesisteem te implementer en watter die mees geskikte kleregrootte-aanwysingsisteem vir hul verbruikers en interne sisteme sal wees. Die standaarde wat vir hierdie studie gestel is, sowel as die metodologieë wat geïmplementeer is, is ‘n aansienlike verbetering op die groottes en pas van kinderklere binne die konteks van die Suid-Afrikaanse vervaardigers, kleinhandelaars en verbruikers.

Thesis (MA)--University of Stellenbosch, 2002. / ENGLISH ABSTRACT: Recently, Participatory action research (PAR) has become a common approach to social programmes in South Africa. This tendency has created a need to evaluate this kind of programmes to determine if it really achieves what it sets out to do. The purpose of this study was to evaluate an entrepreneurial skills training programme in a rural community where a participatory action research approach was followed. A literature review was undertaken to present an in-depth look into the body of literature that surrounds the study. Programme evaluation was discussed as a research design, including types and stages of evaluation. The concept of empowerment was investigated. The review also included a study of literature on PAR, especially the definitions, context and process of PAR. The role of entrepreneurship in rural development was also investigated as well as the evaluation of entrepreneurial skills training programmes. An entrepreneurial skills training programme was implemented in the rural town of Darling on the West Coast of South Africa. The PAR approach was followed in the implementation of the study that was conducted over a period of 15 months. Participants joined the programme that included different projects, voluntarily. The participants were divided into three groups according to their period of participation in the programme. The researcher facilitated actions as well as reflection meetings with the group of participants before and after the entrepreneurial skills training course. The researcher made field notes during the implementation of the programme. The participants' empowerment status was measured with a standardized questionnaire using a pre-test-post-test design. The participants' application of the entrepreneurial skills that were taught in the course was measured during semi-structured interviews at the end of the research perico. four case studies document the extremes of the respective outcomes of the programme, namely empowerment and entrepreneurship. Statistical analysis showed statistically significant improvements in the micro, macro and total empowerment scores of the total group. Looking at the three groups separately, group one showed statistically significant improvements on the micro and interface levels and group two on the micro level. Even though group three showed small improvements on all three levels, none of them were statistically significant. Data from the field notes wer:e analyzed according to the PAR concepts of participation, action and reflection. Participation mostly had a collaborative nature; action was aimed at economical change and reflection aimed at practical problem solving. The interviews revealed that 20 of the 24 participants had micro baking businesses at the end of the research period and they succeeded in the short-term goal of applying the skills that were taught in the course. The case studies showed no correlation between the participants' application of entrepreneurial skills and the changes in their empowerment status. The findings of the study suggest that the longer participants participate in a PAR programme, the bigger the improvement in their empowerment status will be. Monitoring of the implementation revealed that the study fell short of the "ideal type" of PAR, since participation was not yet collegiate. Actions were only effective in economic change and not in social transformation. Reflection resulted in limited critical self-awareness among the participants. The PAR approach has proven to be successful in the attainment of the short-term goals of an entrepreneurial skills training programme. The long-term sustainability of the entrepreneurs' businesses will have to be followed-up by further research. / AFRIKAANSE OPSOMMING: Die afgelope tyd is deelnemende aksie navorsing (DAN)'n algemene benadering tot sosiale intervensie programme in Suid-Afrika. Hierdie tendens het 'n behoefte laat ontstaan om hierdie tipe programme te evalueer om te bepaal of dit werklik die program doelwitte bereik. Die doel van hierdie studie was om 'n entrepreneursvaardighede opleidingsprogram in 'n landelike gemeenskap waar die DAN-benadering gevolg is, te evalueer. 'n Literatuuroorsig is onderneem om die konseptueie raamwerk wat vir die studie saamgestel is, te kan beredeneer. Programevaluering, insluitende tipes and stadia van evaluering, is bespreek as 'n navorsingsontwerp. Die konsep van bemagtiging is ook bestudeer. Die oorsig het 'n ook studie van literatuur oor DAN ingesluit, veral definisies, die konteks en die proses van DAN. Die rol van entrepreneurskap in landelike ontwikkeling is 00~ ondersoek sowel as die evaluering van opleidingsprogramme gemik op die ontwikkeling van entrepreneursvaardighede. 'n Entrepreneursvaardighede opleidingsprogram is in 'n landelike dorpie, Darling, aan die Weskus van Suid-Afrika geïmplementeer. Oor 'n periode van 15 maande is die DAN-benadering in die implementering van die program gevolg. Deelnemers het vrywillig by die program wat uit verskillende projekte bestaan het, aangesluit. Die deelnemers is na aanleiding van hul tydperk van deelname in die program in drie groepe verdeel. Die navorser het aksies sowel as refleksie byeenkomste met die groep deelnemers voor en na die entrepreneursvaardighede opleidingskursus gefasiliteer. Die navorser het veldnotas tydens die implementering van die program gemaak. Die deelnemers se bemagtigingstatus is gemeet met 'n gestandaardiseerde vraelys terwyl 'n voor-en-na-toets ontwerp gevolg is. Die deelnemers se toepassing van die entrepreneursvaardighede wat in die kursus geleer is, is tydens semigestruktureerde onderhoude aan die einde van die navorsingsperiode gemeet. Vier gevallestudies dokumenteer die uiterstes van die onderskeidelike uitkomste van die program, naamlik bemagtiging en entrepreneurskap. Statistiese analise het statisties betekenisvolle verbeteringe in die mikro, makro en totale bemagtigingsvlakke van die totale groep getoon. Afsonderlik gesien, het groep een statisties betekenisvolle verbeteringe op die mikro en tussenvlak getoon en groep twee net op die mikrovlak. Alhoewel groep drie klein verbeteringe op al drie vlakke getoon het, was geen van die verbeteringe statisties betekenisvol nie. Data van die veldnotas is volgens DAN konsepte, naamlik deelname, aksie en refleksie geanaliseer. Die deelnemers en die fasiliteerder se deelname het meestal In samewerkende aard gehad, aksie was gemik op ekonomiese verandering en refleksie was gemik op praktiese probleemoplossinq. Die onderhoude het aangetoon dat 20 van die 24 deelnemers aan die einde van die navorsingsperiode In mikro bakbesigheid gehad het en dat hulle daarin geslaag het om die korttermyn doelwit, naamlik die toepassing van die vaardighede wat in die kursus geleer is, te bereik. Die gevallestudies het geen korrelasie getoon tussen die deelnemers se toepassing van entrepreneursvaardighede en die veranderinge in hulle bemagtigingstatus nie. Die studie se bevindinge dui daarop dat hoe langer deelnemers aan In DAN-program deelneem, hoe groter sal die verbetering in hulle bemagtigingstatus wees. Die monitering van die implementering van die program het laat biyk dat die studie tekort skiet in vergelyking met die "ideaaltipe" van DAN, want die deelname was nog nie korporatief nie. Aksies was net suksesvol in ekonomiese verandering en nie in sosiale transformasie nie. Refleksie het tot beperkte kritiese "selfbewustheid" by die deelnemers gelei. Dit blyk dat die DAN-benadering suksesvol was om die korttermyn doelwitte van In entrepreneursvaardighede opleidingsprogram te bereik. Die langtermyn volhoubaarheid van die entrepreneurs se bakbesighede sal met verdere navorsing opgevolg moet word.