Sun protection has gained worldwide attention because repetitive overexposure to ultraviolet radiation can result in harmful effects on human skin, including sunburn, premature skin ageing, and in the worst case, skin cancer (Eckhardt and Rohwer, 2000; Sengupta and Blain, 2001). The diminishing stratospheric ozone layer, due to environmental degradation in the past few decades, combined with the modern outdoor-oriented lifestyles, are leading to unexpected levels of skin cancer (Davis, Capjack, Kerr, and Fedosejevs, 1997). Wearing Ultraviolet protective clothing is a simple way of practicing sun safety; however, regular cotton generally has very low ultraviolet protection and it is one of the most environmentally damaging crops despite of it is commonly used to make summer clothing. With the increased interest of public awareness related to sustainability and environmental issues, naturally colored cotton was recommended as it provides better ultraviolet protection than regular cotton. In addition, the production of naturally colored cotton is more environmentally friendly than regular cotton. Although several studies have been conducted on the UVR protection of naturally colored cotton, many questions regarding the factors that influence the UVR protection of fabrics remain unanswered. The primary purpose of the study was to examine the effects of perspiration application, weathering exposures, washing action of automatic home clothes washers, and repeated laundering on the UVR protection of a NC lightweight cotton fabric. In addition, five fabric property changes in the test specimen after the treatments of perspiration, weathering exposure, washing action, and repeated laundering (i.e., fabric count change, thickness change, weight change, color change and dimensional change) were included in this study to serve as secondary dependent variables to examine if the four treatment factors (i.e., perspiration application, weathering exposures, washing action of automatic home clothes washers, and repeated laundering) will cause changes in these five fabric properties, and if these changes will lead to changes of UVR protection of NC lightweight cotton fabric. Based on the purpose and objectives of the study, a split-plot repeated measures experimental design was used for the current study. In this study, the whole plot treatment was the weathering exposure, which contained three levels (i.e., semi-tropical climate without water spray, semi-arid climate, and standard conditioning), and the split plot treatments were the combinations of two treatment factors. In order to understand the effects of repeated laundering on the UVR protection and the five fabric properties, except for the control group, all test specimens were laundered after being treated with the three treatment factors (i.e., perspiration, weathering exposure, and washing action), and this process was repeated 15 times. The UVR protection (i.e., express in UPF value change in current study) and the five fabric properties of these treated test specimens were measured before laundering, and after each laundering cycle. The results of UPF value change showed that test specimens treated with perspiration had a lower change in UPF value than the specimens without treatment. The test specimens exposed to Florida condition had the most UPF value change, followed by Arizona and Standard textile testing conditions. A significant difference also found in test specimens that laundered in a traditional washer after ninth cycle and the UPF value decreased as the number of laundering cycle increased. However, test specimens that laundered in a front-loading HE washer showed no significant UPF value change. For the five fabric properties that listed in secondary objective, all four treatments significantly influenced fabric count, fabric thickness and fabric weight. However, perspiration treatment had no significant effect on the dimensional change in warp direction of test specimens, and washing action had no significant effect on the dimensional change in filling direction of the test specimen as well as both Delta E and Delta L of color change. For testing the relationship between the changes of the five fabric properties and UPF value change, Delta E and Delta L of color change had the highest correlation coefficient with UPF value change. Therefore, it is possible that the changes of these two properties caused by the four treatments and lead to the UPF value change. Future research is needed to confirm this relationship. In conclusion, of perspiration application, weathering exposures, washing action of automatic home clothes washers, and repeated laundering do have influence on the ultraviolet protection of the naturally colored cotton. The color change of the test specimens caused by these four treatments possible lead to the change of the ultraviolet protection of the test specimens. More studies are needed to confirm this relationship. / Ph. D.

A preliminary experiment evaluated the effect of plant growth regulators (PGRs) or mechanical stimulation (brushing) on branching of sweet basil (Ocimum basilicum L.), cilantro (Coriandrum sativium L.), and parsley (Petroselinum crispum (Mill.) Nyman ex A.W. Hill). Dikegulac sodium increased branching in sweet basil up to 400 ppm and thereafter branching decreased compared to control plants. Ethephon increased branching in sweet basil as rate increased up to 500 mg/L compared to control plants. Mechanical stimulation resulted in a significant decrease in plant height, plant width, number of branches, and number of leaders for all species compared to control plants. Benzyladenine and metaconazole had no effect on these species. In the main experiment the effect of colored shade cloth and PGRs or brushing were assessed on sweet basil, Thai basil (Ocimum basilicum "Siam Queen" L.), Genovese basil (Ocimum basilicum "Genovese" L.), cilantro, and parsley. All crops were grown under conventional black, blue ChromatiNet®, or red ChromatiNet® shade cloth. Subplot treatments included: dikegulac sodium at 400 ppm; benzyladenine at 300 ppm; ethephon at 350 ppm; brushing at 10 strokes applied twice daily. We assessed volatile compunds on all crops and conducted a sensory panel on sweet basil. Red shade cloth increased the number of branches and shoot fresh weight in sweet basil, Thai basil, and Genovese basil. Number of leaf stalks and shoot fresh weight also increased in cilantro plants grown under red shade cloth. Red shade cloth increased fresh weight of parsley plants. Sensory panel results showed a preference for the appearance of sweet basil grown under red shade cloth. Red shade cloth can be used to grow sweet basil, Thai basil, Genovese basil, cilantro, and parsley plants that have more branches and higher fresh weights. / Master of Science

Yes / This article aims to investigate the flowability, physical, mechanical, and durability properties of metakaolin (MK)-added colored cement mortars exposed to the effects of H2SO4 sulfuric acid (SA) and HNO3 nitric acid (NA). MK was used in 20% replacement with cement, and yellow (YP) and red pigments (RP) were added to the mixtures at 1% and 3% of the cement by weight. According to the results, although MK reduced the workability and, therefore, the flow diameter (FD) of mortars, thanks to the void-filling feature of MK, filling the voids in the microstructure caused the samples' apparent porosity (AP) and relative dynamic modulus of elasticity (RDME) to decrease. Additionally, MK significantly improved the residual compressive (RCS) and residual flexural strengths (RFS) of the samples thanks to the calcium-silicate-hydrate (C-S-H) bonds it formed in the interior structure, owing to its high pozzolanic efficiency. Moreover, this improvement of MK is more remarkable in samples that remain subject to SA and NA attacks for more time. Furthermore, while YP reduces the workability of mortars and, therefore, the FD value due to its needle-tipped grain structure, RP increases the FD value of the mortars with its spherical grain structure. However, YP and RP contributed to reducing the AP of the samples and increasing RCS and RFS capacities at a meager rate by showing a micro-filling effect. In addition, there were significant increases in the total color changes (E) of YP and RP-added colored mortar samples, especially after longer SA and NA attacks. / This paper is financially supported by the University of Van Yüzüncü Yil, Department of BAP, within the scope of the CDS-2023-10468 project. / The full-text of this article will be released for public view at the end of the publisher embargo on 4 May 2025.

Thesis (MA)--University of Stellenbosch, 2000. / ENGLISH ABSTRACT: A combined quantitative and qualitative methodology was employed in order to explore the intimate heterosexual context of coloured* pregnant adolescents as a determinant of their sexual risk-taking behaviour. Structured questionnaires were completed by forty young women attending prenatal clinics in the Stellenbosch area, and unstructured open-ended interviews subsequently conducted with ten selected respondents. It was found that the heterosexual relationships in which these girls were involved, tended to be intense emotional attachments based upon a foundation of friendship and trust, and reinforced by cultural notions of romantic love. In the wake of working class socioeconomic circumstances these relationships became a primary source of meaning-giving in respondents' lives, pervading all aspects of their everyday existence and guiding their future prospects. And it is in this context that sex prevailed as a means of deepening the emotional experience and pursuing relationship maintenance. Reproductive health interventions for coloured female adolescents would have to acknowledge these complexities and act upon them in ingenuous ways. / AFRIKAANSE OPSOMMING: 'n Gekombineerde kwantitatiewe en kwalitatiewe metodologie is geïmplementeer ten einde te bepaal op welke wyse die intieme heteroseksuele konteks van kleurling* swanger adolessente hulle seksueel riskante gedrag beïnvloed. Gestruktureerde vraelyste is voltooi deur veertig jong vroue wat prenatale klinieke in die Stellenbosch area bygewoon het, waarop ongestruktureerde nie-leidende onderhoude met tien geselekteerde respondente gevoer is. Dit is bevind dat hierdie meisies se heteroseksuele verhoudings meestal intense emosionele verbintenisse was, wat gebaseer is op 'n grondslag van vriendskap en vertroue, en wat versterk is deur kulturele opvattings van romantiese liefde. In die lig van werkersklas sosio-ekonomiese omstandighede, het hierdie verhoudings 'n primêre bron van betekenis in respondente se lewens geword. Dit het alle aspekte van hulle daaglikse bestaan beïnvloed en hulle toekomsvooruitsigte gerig. En dit is binne sodanige konteks wat seks beoefen is. Dit was instrumenteel ten einde verdieping van die emosionele ervaring en voortsetting van die verhouding te probeer bewerkstellig. Reproduktiewe gesondheidsintervensies vir kleurling vroulike adolessente sal erkenning moet gee aan hierdie kompleksiteite en vindingryke oplossings daarvoor moet genereer.

Thesis (DPhil)--University of Stellenbosch, 2000. / 218 leaves printed on single pages, preliminary pages i-xvii and numbered pages 1-200. Includes bibliography and list of tables. / Digitized at 600 dpi grayscale to pdf format (OCR), using a Bizhub 250 Konica Minolta Scanner. / ENGLISH ABSTRACT: Little is known about women's sexuality and even less about female adolescent sexuality. Sex researchers have neglected women, young women and specifically young women of colour and of lower socio-economic status. These gaps in sex research have to be addressed for at least two important reasons. In the first place an understanding of female adolescent sexuality will enhance our understanding of female development in general. More specifically, the prevalence of reproductive health problems like sexually transmitted diseases (STDs) and unplanned pregnancies among female adolescents warrant urgent attention. This study attempted to address the need for data on female sexuality by focusing on coloured female adolescents in the Stellenbosch district. This target group has been chosen because of the extent of adolescent reproductive health problems, specifically the prevalence of teenage pregnancy, in the low-income coloured community. The objective of the study was to gain an understanding of adolescent female sexuality in a specific community. This goal was reached by collecting quantitative and qualitative data about sexuality from a group of high school learners from a historically coloured community in the Stellenbosch district. Structured questionnaires were used to elicit the quantitative data. The quantitative data were analysed to determine the following (i) the range of sexual behaviours, and (ii) the prevalence of high-risk behaviours that the respondents engaged in. The quantitative results indicate that the research respondents did not represent a sexually high-risk community. Sexual intercourse was limited to a relatively small number of respondents. The sexual behaviour of these respondents, in general, did not differ meaningfully from the sexual behaviour reported in other adolescent communities. Open-ended interviews were used to generate the qualitative data. Twenty-five sexually active girls were interviewed. The grounded theory method was used to analyse the qualitative data and to explore the respondents' constructions of sexuality. Lack of sexual agency and need for connection were identified as the core categories in the interview data. The interview data indicated that the respondents had limited sexual agency and the researcher argued that mothers and boyfriends, as agents of the community, were prominent contributors to sexual disempowerment. The use of the term "coloured" is controversial. It is viewed by some as derogatory, whilst others argue the importance of a 'coloured' identity. Here and throughout the term "coloured" will be used descriptively. The researcher concluded that a new discourse of sexual agency for young women must be developed. / AFRIKAANSE OPSOMMING: Daar bestaan min data oor vroulike seksualiteit en selfs nog minder oor vroulike adolessente seksualiteit. In die verlede het seksnavorsers vroue, jong vroue en spesifiek gekleurde en lae sosio-ekonomiese vroue verwaarloos. Hierdie tekortkominge in seksnavorsing behoort om ten minste twee belangrike redes aangespreek te word. Eerstens sal 'n begrip van vroulike adolessente seksualiteit ons begrip van vroulike ontwikkeling in die algemeen bevorder. 'n Meer spesifieke rede is dat die die vookoms van reproduktiewe gesondheidsprobleme soos seksueel-oordraagbare siektes en onbeplande swangerskappe onder vroulike adolessente, dringende aandag vereis. Hierdie studie het gepoog om die behoefte aan data oor seksuele gedrag in verskillende Suid-Afrikaanse gemeenskappe aan te spreek deur te fokus op "kleurling" vroulike adolessente in die Stellenbosch-distrik. Hierdie groep is geselekteer vanwee die omvang van adolessente reproduktiewe gesondheidsprobleme, veral die voorkoms van tienerswangerskappe, in die "kleurling" gemeenskap. Die doel van die studie was om 'n begrip te kry van adolessente vroulike seksualiteit in 'n spesifieke gemeenskap. Kwantitatiewe en kwalitatiewe data is versamel oor die seksualiteit van 'n groep hoerskoolleerders wat woonagtig was in 'n histories "kleurling" gemeenskap in die Stellenbosch-distrik. 'n Gestruktureerde vraelys is gebruik om die kwantitatiewe data in te win. Die kwantitatiewe data is geanaliseer om (i) die reeks van seksuele gedrag wat by die respondente voorkom en (ii) die voorkoms van hoe risiko seksuele gedrag onder die respondente te bepaal. Die kwantitatiewe resultate het aangedui dat die navorsingsrespondente nie 'n hoe risiko groep verteenwoordig nie. Seksuele gemeenskap was beperk tot 'n relatiewe klein hoeveelheid respondente. In die algemeen, het die seksuele gedrag van die respondente nie betekenisvol verskil van die seksuele gedrag wat gerapporteer is vir ander adolessente populasies nie. Oop-einde onderhoude is gebruik om die kwalitatiewe data te genereer. Onderhoude is gevoer met vyf en twintig seksueel aktiewe meisies. Die "grounded theory" metode is gebruik om die kwalitatiewe data te analiseer en die respondente se konstruksies van seksualiteit te eksploreer. Gebrek aan seksuele agentskap en behoefte aan konneksie is geidentifiseer as die kernkategoriee in die onderhoudsdata. Die onderhoudsdata het aangedui dat die respondente oor beperkte seksuele agentskap beskik. Die navorser het aangevoer dat moeders en mansvriende, as agente van die gemeenskap, 'n prominente bydrae tot gebrek aan seksuele bemagtiging maak. Die navorser het tot die konklusie gekom dat 'n nuwe diskoers van seksuele agentskap vir jong vroue ontwikkel behoort te word.

Thesis (MA)--University of Stellenbosch, 2000. / ENGLISH ABSTRACT: Statistics indicate that not only HIV-infection and AIDS but all sexual and reproductive health problems are increasing globally. In order to address these issues the socio-cultural context in which sexual behaviour is expressed must be understood. Given that sexual health risks are compounded by socio-political and socio-economic issues, researchers must direct their focus to high-risk, low socio-economic communities. Adolescents have been identified as a prime target for sexual awareness and preventative programmes and research has stressed the importance of gaining an understanding of adolescent sexuality, in order to address the sexual health risks that threaten adolescents. In addition, there is a paucity of research on especially the role of the male adolescent in the study of sexual and reproductive health. In the current study, constructions of male adolescent sexuality in traditionally coloured and rural communities were explored. The nature of the research was exploratory and the aims were to determine the range and frequency of sexual behaviour that male adolescents in a specific community engage in and secondly, explore male adolescents' constructions of their sexuality and sexual behaviour in intimate heterosexual sexual relationships. Multiple methods of data collection were utilised. Self-report questionnaires were completed by 179 male adolescents between the age of 15 and 21, at two schools in the rural areas surrounding Stellenbosch. The data from the questionnaire was quantitatively analysed. Seven in-depth interviews were conducted with male adolescents between the age of 16 and 18. The data from the interviews was analysed qualitatively. An analysis of the data indicated that male adolescents' ability to take control over safe sex practices are undermined by attempts to defend and conceal their sexual behaviour and sexuality. Male adolescents from traditionally coloured and rural areas distance and externalise their sexual behaviour and sexuality. Sexual behaviour is explained and understood as being directed by external factors and by fear of negative evaluation by peers and parents. Such a construction of sexuality continues to prevent male adolescents from understanding and constructing their sexuality as self-owned and self-directed. In turn this construction continues to result in behaviour that runs counter to safe sex guidelines. / AFRIKAANSE OPSOMMING: Statistieke toon dat alle seksueel-oordraagbare siektes en reproduktiewe gesondheidsprobleme, insluitend HIV-infeksie en VIGS, op globale vlak toeneem. Ten einde hierdie probleme aan te spreek is dit noodsaaklik om die sosio-kulturele konteks van seksualiteit en seksuele gedrag in ag te neem. Gegewe dat sosio-politiese en sosioekonomiese omstandighede 'n impak het op seksuele gesondheidsrisikos, word navorsers genoodsaak om hul fokus te rig op hoë-risiko, lae sosio-ekonomiese gemeenskappe. Adolessente word geïdentifiseer as primêre teikengroep vir bewustheids- en voorkomingsprogramme aangaande seksualiteit. Navorsing toon die belangrikheid aan van insig in adolessente seksualiteit, ten einde seksuele gesondheidsrisiko's in dié teikengroep aan te spreek. Verder is daar ook 'n leemte in navorsing betreffende die rol van die manlike adolessent in seksuele en reproduktiewe gesondheid. Hierdie studie het die konstruksies van manlike adolessente seksualiteit in tradisioneel "kleurling", landelike gemeenskappe ondersoek. Die navorsing is eksploratief van aard, met primêre doelwit 'n bepaling van die omvang en frekwensie van seksuele gedrag waarin manlike adolessente in 'n spesifieke gemeenskap deelneem. 'n Sekondêre doelwit is om manlike adolessente se konstruksies van hul seksualiteit en seksuele gedrag in intieme heteroseksuele verhoudings te ondersoek. Data-insameling het 'n kombinasie van metodes behels. Vraelyste is deur 179 manlike adolessente tussen die ouderdom van 15 en 21, komende uit twee skole in die Stellenboschdistrik, ingevul. Die data is kwantitatief geanaliseer. Verder is sewe in-diepte onderhoude met manlike adolessente tussen die ouderdom van 16 en 18 gevoer. Data uit hierdie onderhoude is kwalitatief geanaliseer. Die analise van die data het aangedui dat manlike adolessente se vermoë om beheer te neem oor veilige seksuele praktyk, ondermyn word deur pogings om hul seksualiteit en seksuele gedrag te verskans. Manlike adolessente vanuit tradisioneel "kleurling", landelike gemeenskappe distansiëer hulself van en eksternaliseer hul seksuele gedrag en seksualiteit. Seksuele gedrag word betekenis gegee en verstaan as gedrag wat deur eksterne faktore en die vrees vir negatiewe evaluering deur ouers en die portuurgroep, beheer word. Hierdie konstruksie van seksualiteit verhoed dat manlike adolessente hul seksualiteit in 'n konteks van selfbeheer en selfbesit kan betekenis gee. Sulke konstruksies dra daartoe by om veilige seksuele gedragsriglyne te ondermyn.

Thesis (MA)--Stellenbosch University, 1976. / ENGLISH ABSTRACT: In this study the representation of the Coloured population group in the local evaluation process in South Africa until 1971, is analysecd to determine the effectiveness of this system of representation. In theory representatives selected in an open democratic election are supposed to act in the interest of the voters they represent, in a manner responsive to them. In this way the voters or citizens have access to and control over the decision-making centres of government, and are represented in the legislative structures of government. Representation can be analysed in two ways. / INLEIDING: Gedurende die periode 1960 - 1972 was die Kaapprovinsie die enigste provinsie binne die Republiek van Suid-Afrika waar Kleurlinge (en Indiërs) saam met Blankes deelgeneem het aan die plaaslike bestuursprosesse, sonder dat daar formeel ‘n rasse- of kleuronderskeid gemaak is tussen munisipale kiesers. Hierdie gesamentlike deelname het egter nie sonder "wrywing" plaasgevind nie, en dit was dan ook een van die redes vir die verwydering van die Kleurlingkiesers op 14 Januarie 1972 vanaf die gemeenskaplike munisipale kieserslys en die ontneming daardeur van hul direkte stemreg op die plaaslike bestuursvlak ten gunste van verteenwoordiging in sekere adviserende bestuurs- of raadplegende komitees vir Kleurlinge wat in ‘n ondergeskikte posisie teenoor die munisipale- of afdelingsraad in die betrokke plasslike owerheidsgebied verkeer.

Thesis (PhD)--Stellenbosch University, 1991. / ENGLISH ABSTRACT: A song has to be accepted by the community, must form part of the oral tradition and be handed over from one generation to the next, before it can be called a folk song. In the process of oral tradition, variants usually develop. A folk song is therefore never complete the moment it is created, but is formed gradually through a process of changes. The Afrikaans folk song sung by the coloured people has the same characteristics as the folk song in general. The fact that oral tradition is the major way of spreading songs, is evident from the many variants that occur and from the examples of transformation of words and melody ("Umsingen"and "Zersingen"). Simplicity, the use of the major key and the avoidance of modulation are prominent characteristics. Suggestiveness and coarse language are fairly common. Melismata are very rare and usually occur in songs which probably have their origin in old Afrikaans records. Most of the songs collected amongst coloured children are used to accompany games. The children seldom sing without playing or play without singing. Most variants are found amongst children's songs. Dancing songs are without a doubt the most popular amongst the songs of adults. The form of the stanzas is very simple and usually the songs consist of many stanzas. A small percentage of the songs collected, more or less 5%, presumably originate from old Afrikaans grammophone records. Most of these songs have been transformed by popular usage and even amongst them variants have been found. The main themes of this group of songs are love, parting, grief and death. Picnic songs, work songs, war songs and drinking songs have been found. Humoristic and mocking songs contribute to the entertainment value of the folk song and are also found amongst the coloured people. Because there is so much interaction between sacred songs and secular songs, especially where the melodies are concerned, the two groups cannot always be separated from each other. The sacred songs of the coloured people are mostly of the "refrain"-type. When a group of coloured people perform the sacred songs, they usually harmonise spontaneously and most beautifully. The fact that so much has been said and written on the subject of the folk song, and that even in recent years substantial research projects have been carried out, is proof enough that the folk song has not yet died out. The Afrikaans folk song features strongly amongst coloured people, though noticeably influenced by the English language, modern technology and urbanisation. / AFRIKAANSE OPSOMMING: 'n Volkslied is 'n lied wat deur die gemeenskap aanvaar is, mondelings versprei word en op dieselfde wyse van geslag tot geslag oorgelewer word en waarvan daar in die prosesse variante ontstaan. 'n Volkslied is dus nie voltooi die oomblik dat die eerste vorm geskep is nie, maar word deur 'n langsame proses geleidelik gevorm en omvorm. Die Afrikaanse volkslied wat deur die bruinmense gesing word, toon dieselfde kenmerke as die volkslied in die algemeen. Daar is tekens van mondelinge oorlewering wat veral weerspieel word deur die baie variante wat aangetref word, sowel as talle voorbeelde van verbrokkeling en ver~ vorming ("Umsingen" en "Zerzingen"). Eenvoud in woord en melodie is opvallend. Die majeurtoonaard, met vermyding van modulasie, kom feitlik deurgaans voor. Suggestiwiteit en growwe taal is redelik algemeen. Melismes kom selde voor en dan meestal by liedere wat waarskynlik van ou Afrikaanse plate kom. By die opnames onder bruin kinders is gevind dat die oorgrote meerderheid liedere wat hulle sing, een of ander vorm van spel begelei. Hulle sing selde sonder om te speel, en hulle speel selde sonder om te sing. Die meeste variante van liedere word ook by die kinders aangetref. By die liedere van volwassenes is die danslied ongetwyfeld die gewildste. Die meeste daarvan bestaan uit kort, eenvoudige strofes met baie strofes in een lied. 'n Klein persentasie van die liedere wat versamel is, ongeveer 5%, is vermoedelik van ou Afrikaanse grammofoonplate afkomstig. Die meeste daarvan het baie vervorm in die volksmond en selfs daarvan is variante aangetref. Die temas van hierdie groep liedere handel hoofsaaklik oor die liefde, afskeid, hartseer en die dood. Voorbeelde van piekniek-, arbeids- en oorlogsliedere, sowel as enkele drinkliedere en doprympies is aangetref. Die humoristiese lied en spotlied dra by tot die vermaaklikhiedsfunksie van die volkslied en kom ook by die bruinmense voor. Die gewyde of geestelike lied kan nie altyd streng van die wereldlike lied geskei word nie. Daar is te veel wisselwerking tussen die twee groepe, veral wat wysies betref. Die gewyde liedere wat by die bruinmense,aangetref is, is meestal van die sogenaamde "koortjie"-tipe. 'n Kenmerk van hulle gewyde sang is dat wanneer dit deur 'n groep gesing word, dit altyd meerstemmig is met pragtige harmoniee wat op natuurlike wyse gedoen word. Die feit dat daar al so baie oor die volkslied geskryf is en selfs onlangs nog omvatteride studies daaroor die lig gesien het, is bewys dat die volklied nog nie uitgesterf het nie. Daar is bewys dat die Afrikaanse volkslied onder die bruinmense baie sterk staan, hoewel Engelse invloed duidelik merkbaar is en tekens van moderne ontwikkeling en verstedeliking onmiskenbaar waargeneem kanword.

As plantas tropicais vêm ocupando uma parcela crescente do setor de floricultura, tanto no mercado nacional quanto no internacional, por apresentarem formas exuberantes e coloridas. Neste sentido, o Costus lasius Loes. tem se destacado entre as plantas ornamentais por possuir, como característica mais atraente, pequenas inflorescências amarelo-ouro e caule pouco espiralado, marcas que dão leveza à combinação de plantas de vaso. Entretanto, esta espécie é pouco pesquisada no Brasil, principalmente quanto às condições ambientais de cultivo, de nutrição e de manejo da fertirrigação. O presente trabalho tem como objetivo avaliar o efeito de diferentes malhas fotoconversoras de sombreamento e diferentes concentrações de potássio, no cultivo de Costus lasius em ambiente protegido. O experimento foi conduzido em uma área experimental do Departamento de Produção Vegetal da Escola Superior de Agricultura \"Luiz de Queiroz\", em Piracicaba, SP. Os tratamentos foram constituídos da combinação de cinco concentrações de potássio na solução de fertirrigação (40, 80, 120, 160 e 200 mg L-1), com três diferentes colorações de cobertura Chromatinet (Polysak Plastic Industries Ltd), nas cores vermelha, azul e preta, com índice de sombreamento de 50%. Foram utilizados 25 vasos \"pote 19\" por malha, em um total de 75, com um número de duas plantas por vaso, dispostos em bancadas de alumínio já disponíveis no local. Foram avaliados o crescimento das plantas, o número de folhas, de hastes e de inflorescências, as dimensões das hastes e das inflorescências, a sanidade das folhas e das inflorescências, o índice de preenchimento de vaso, a matéria fresca e seca, o índice de área foliar, o índice de estresse hídrico da cultura, o índice de clorofila e o acúmulo das concentrações de macronutrientes no tecido vegetal. O sombreamento com a malha vermelha melhorou as características de crescimento, número de folhas e aumentou a produção de massa fresca e seca de costus. A concentração de 200 mg L-1 de K+, na solução de fertirrigação, é a recomendada para aumentar a massa fresca e o maior número das inflorescências, características relevantes para a espécie Costus lasius como planta ornamental. Os maiores teores de potássio acumulados nas inflorescências do costus são proporcionados pela concentração 200 mg L-1 sobre as malhas vermelha e azul; e pela concentração 160 mg L-1 no ambiente sombreado com a malha preta. A dose de 200 mg L-1 de K+ associada a malha preta conduzem aos melhores resultados em termos de produção de hastes e inflorescências. O cultivo de costus sobre a malha azul tem maior eficiência no aproveitamento da clorofila e no processo fotossintético, indicando a camada basal das folhas como referência para esse tipo de avaliação. O IEHC apresenta grande variabilidade durante todo o ciclo e indica o ambiente de malha vermelha como o mais passível de causar estresse hídrico para as plantas na maioria dos meses estudados. / Tropical plants have been participating of a growing portion in brazilian floriculture and in international markets, because of its exuberant and colorful forms. In this sense, the Costus lasius Loes. has stood out among ornamental plants because of its more attractive characteristics: small yellow-gold inflorescences and slightly spiraled stem, attributes that give lightness to the potted plants. However, there are few studies about this species in Brazil and mainly regarding the environmental conditions of cultivation, nutrition and fertirrigation management. The goal of this work is to evaluate the effect of different photoconverters meshes and different concentrations of potassium in the cultivation of Costus lasius in greenhouse. The experiment was conducted in an experimental area of the Plant Production Department at the School of Agriculture \"Luiz de Queiroz\", in Piracicaba, SP. Treatments were composed by a combination of five potassium concentrations in the fertigation solution (40, 80, 120, 160 and 200 mg L-1) in three different meshes (Polysak Plastic Industries Ltd): red, blue and black, with shading capacity of 50%. For each meshe color twenty-five pots were used, 75 pots in total, with two plants per pot, arranged in aluminum benches already available at the place. In this experiment were evaluated the plants growth, number of leaves, stems and inflorescences, dimensions of stems and inflorescences, leaves and inflorescences health, vessel filling index, fresh and dry matter, leaf area index, crop water stress index, chlorophyll index and accumulation of macronutrients concentrations in plant tissue. The shading with the red mesh improved the growth characteristics, number of leaves and increased the production of fresh and dry mass of costus. The K+ concentration of 200 mg L-1 in the fertigation solution is recommended to increase the fresh mass and to achieve the highest number of inflorescences, which are relevant characteristics for the specie Costus lasius as ornamental plant. The highest levels of accumulated potassium in costus inflorescences are provided by the concentration of 200 mg L-1 on the red and blue meshes; and by the concentration of 160 mg L-1 in the environment shaded with the black mesh. The dose of 200 mg L-1 of K+ associated with black mesh leads to the best results in terms of stem and inflorescence production. The cultivation of costus on the blue mesh has greater efficiency in the use of chlorophyll and in the photosynthetic process, indicating the basal layer leaves as reference for this type of evaluation. The CWSI shows great variability throughout the cycle and indicates the red mesh environment as the most likely to cause hydric stress to plants in most of the months studied.

O tratamento das fraturas de mandíbulas edêntulas é motivo de controvérsias na literatura e um dos fatores que tornam seu tratamento complexo é o suprimento sanguíneo reduzido. Nesse contexto, o ultra-som Doppler consiste em exame nãoinvasivo o qual pode ser utilizado na análise de alterações da vascularização de diversos segmentos corpóreos e influenciar decisões clínicas. Este trabalho teve como objetivo avaliar a vascularização mandibular de pacientes edêntulos que foram submetidos a tratamento de fratura de mandíbula (grupo experimental), por meio de ultra-som doppler colorido. Possíveis correlações entre os dados clínicos, radiográficos e a vascularização mandibular foram analisadas. O fluxo arterial de vasos, como carótida externa, maxilar, facial, mentual, submentual e sublingual, após o tratamento, foi comparado ao fluxo arterial dos mesmos vasos em um grupo controle composto por pacientes edêntulos livres de fratura. Com o emprego do transdutor linear, de maneira extra-oral, foram obtidos velocidade pico-sistólica (VPS), velocidade diastólica final (VDF), índice de resistência (IR), índice de pulsatilidade (IP) e aceleração, de cada artéria. Além disso, foram obtidos detalhes do tratamento por meio de avaliação clínica e radiográfica, assim como da avaliação dos prontuários. Houve diferenças estatisticamente significantes para os valores de IR da artéria mentual, IP da artéria maxilar, VPS, IP e aceleração da artéria submentual. Além disso, na pesquisa de fatores vasculares locais obstrutivos, de acordo com a artéria e os fatores estudados, houve diferenças estatisticamente significantes para o VPS, VDF e IP da artéria facial, IR da artéria sublingual, os quais apresentaram valores menores quando da presença desses fatores. Os grupos experimental e controle foram semelhantes quanto à ocorrência de variações de sentido de fluxo. Na análise das correlações entre os fatores estudados e o grau de atrofia alveolar, foram observadas diferenças estatisticamente significantes para os valores de VPS e VDF da artéria submentual, maiores no grupo não-atrófico. O exame de ultra-som doppler colorido foi capaz de demonstrar alterações em algumas artérias que suprem a mandíbula de pacientes edêntulos submetidos a tratamento de fratura, havendo poucas correlações com o grau de atrofia alveolar. / The treatment of edentulous mandibular fractures is motive of controversies in literature and one of the factors that make this treatment complex is the reduced blood supply. In this context, the doppler ultrasound is a non-invasive method that can be used in the analysis of changes in the vascularization of several corporeous segments and influence clinical decisions. The purpose of this study is to assess the vascular supply of edentulous patients, that have been treated of mandibluar fracture (experimental group), using the colored Doppler ultrasound. Possible correlations between the alveolar atrophy degree and the mandibular blood supply were analyzed. The arterial flow of vessels like external carotid, maxilar, facial, mentual, submentual and sublingual, after treatment, was compared with the arterial flow of the same vessels in a control group, consisting of edentulous fracture-free patients. With the use of linear probe extra-orally, the systolic-peak maximum velocity (SPV), final diastolic velocity (FDV), resistive index (RI), pulsatility index (PI) and acceleration of each artery, was obtained. Also, treatment details were obtained through clinical, radiological investigations, and hospital notes assessments. There was significant statistic differences to the values mentual artery RI, maxilar artery PI, submentual artery SPV, PI and acceleration. Also, in the analysis of the presence of obstructive vascular local factors, according to the artery and studied factors, statistically significant differences were observed to facial artery SPV, FDV and PI, sublingual artery RI, that present lower values when these factors were present. The experimental and control groups were similar in respect to variations in flow direction occurrence. In the analysis of the correlations between the studied factors and alveolar atrophy degree, statistically significant differences were observed to the submentual artery SPV and FDV, higher in non-atrophic group. The color doppler sonography was able to show changes in some arteries that supply the mandible of edentulous patients submitted to fracture treatment, with few correlations with the alveolar atrophy degree.