Thesis (M.S.)--University of Missouri, School of Mines and Metallurgy, 1928. / The entire thesis text is included in file. Typescript. Illustrated by author. Title from title screen of thesis/dissertation PDF file (viewed October 21, 2009) Includes bibliographical references (p. 103).

Thesis (B.S.)--University of Missouri, School of Mines and Metallurgy, 1909. / Year degrees were granted determined from "Forty-First Annual Catalogue. School of Mines and Metallurgy, University of Missouri". The entire thesis text is included in file. Typescript. Illustrated by authors. Title from title screen of thesis/dissertation PDF file (viewed )

Thesis (Ph.D.(Materials Science and Metallurgical Engineering))--University of Pretoria, 1999. / Summaries in Afrikaans and English. Includes bibliographical references.

Thesis (Ph.D.(Mineralogy))--University of Pretoria, 2001. / Summaries in English and Afrikaans. Includes bibliographical references.

Thesis (Ph.D.) - University of Queensland, 2006. / CD-ROM has title : The testural [sic] effects of multiphase mineral systemsin liberation measurement. Includes bibliography.

Summary The thesis deals with the effect of mechanic invasion and top dressing applications on the quality of the lawn's greensward and weight of the root system of the plant. The aim of this thesis was to evaluate the effect of aeration, verticutation and top dressing in terms of support of plant root system, the presence of weeds in the lawn and also effect on the color of the grass and compactness of the lawn. Made mechanization interventions were evaluated without further intervention, verticutation and aeration. Application of top dressing is evaluated with and without step. The experiment was turfed in the Central region, twenty kilometers southeast of Prague. The greatest effect (P<0,05) on the weight of the root system should aeration with verticutation and smallest (P<0,05) the weight of the root system had lawn without mechanization invasion. In evaluating the compactness of the lawn was rated verticutation (P<0,05) as the worst. The best (P<0,05) color had lawn without any mechanized invasion and least (P<0,05) weed species was found out in combination of aeration and verticutation. Application of organic top dressing showed a positive effect on the weight of the root system. It was also found lower incidence of weeds. For top dressing applications has not been demonstrated a positive effect on the colour of the lawn. Application of top dressing had a positive effect on compactness of the lawn.

Made available in DSpace on 2014-06-11T19:24:47Z (GMT). No. of bitstreams: 0 Previous issue date: 2005-02-17Bitstream added on 2014-06-13T19:06:29Z : No. of bitstreams: 1 zhu_nxj_me_bauru.pdf: 4158261 bytes, checksum: bafc2c29b13e8c6fb309c4a1b184788a (MD5) / Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES) / Atualmente tem-se verificado crescente demanda por processos de fabricação capazes de produzir peças sob estreitas faixas de tolerâncias dimensionais e geométricas. Dentre os processos utilizados para conferir acabamento superficial e correção de forma destacam-se a retificação e a lapidação. Porém, muitas peças mostram-se suscetíveis ao calor gerado pela retificação, como no caso da deformação de peças delgadas ou então naquelas peças passíveis de mudanças microestruturais, recorrendo-se nestes casos à lapidação que, por sua vez, é um processo de difícil seleção de parâmetros. Neste trabalho é iniciado o desenvolvimento de um processo híbrido capaz de aliar algumas importantes características da retificação e da lapidação, no qual do primeiro é usado a operação de dressagem e do segundo o movimento cinemático. Dessa forma dotou-se uma... / Lately, one can verify that there has been a growing demand for manufacturing processes capable of producing workpieces under tight dimensional and geometric tolerance rangers. Among the processes used to assure surface finish and shape correction to the part, grinding and lapping arise as the most used. However, many parts show themselves sensitive to the heat generated during the grinding process, as in the case of thin ones, or those susceptible to micro-structural changes. On these cases, one can use lapping, even though being a more difficult parameter selection process. In these studies, the development of a hybrid process capable of binding some important grinding and lapping features is initiated; the dressing operation, for the case of grinding and, for the case of lapping, the cinematic movement... (Complete abstract click electronic access below)

Thesis (MTech (Chemical Engineering))--Cape Peninsula University of Technology, 2016. / The Bushveld igneous complex in northern South Africa has the largest deposit of platinum group elements (PGE) in the world. In trace amounts, these are closely associated with base metal sulphides (BMS). Froth flotation is used to beneficiate these PGE ores. The process constitutes a bulk sulphide recovery. Improvement of recovery of the BMS is required to maximise the recovery of PGEs. The performance of the froth flotation process is largely dependent on the chemical additives used and these chemicals have been extensively studied. Mixtures of collectors are widely used in the flotation of sulphide and platinum group mineral (PGM) ores. A range of performance benefits for the use of mixtures over pure collectors have been observed on many systems. These include improved valuable metal grades and recoveries, lower reagent dosage requirements, improved rates of flotation and enhanced recovery of coarse particles. Improvements observed with mixtures of chemical reagent have been attributed to synergism; defined as the interaction of two or more agents to produce a combined effect greater than the sum of their individual effects. Synergism is highly desired in froth flotation. For this study, mixtures of thiol collectors were used in batch froth flotation tests in an attempt to identify synergism between the different collectors on flotation performance of a typical platinum ore from the Merensky reef. Flotation performance was evaluated in terms of grades and recoveries of copper and nickel, and the rate of metal flotation. Single thiol collectors of xanthate (SIBX), a dithiocarbamate (DTC) and a dithiophosphate (DTP) were evaluated to determine the effect of functional group on flotation performance. SIBX was then used in mixtures with both DTC and DTP at various molar ratios to establish whether synergism occurs between these collectors on this particular platinum ore. Molar ratios of 90:10, 80:20, 70:30 60:40 and 50:50 were considered with SIBX being the major component. Further tests were conducted with the addition of a carboxymethyl cellulose depressant to the collector mixtures.

CoordenaÃÃo de AperfeiÃoamento de Pessoal de NÃvel Superior / O atendimento ao recÃm-nascido na unidade de terapia intensiva requer conhecimentos teÃrico-prÃticos no cuidado com a pele, tendo em vista que vÃrios procedimentos levam à quebra desta barreira protetora e podem causar feridas severas. AlÃm disso, à necessÃrio favorecer sua maturidade em recÃm-nascidos prematuros. Diante disso, o estudo objetivou investigar a eficiÃncia do uso da membrana semipermeÃvel como recurso tecnolÃgico a ser utilizado na pele do RNPT para reduÃÃo das perdas de Ãgua transepidÃrmica e dos distÃrbios hidroeletrolÃticos. Estudo experimental, tipo ensaio clinico randomizado, realizado no perÃodo de marÃo a agosto de 2008, na Unidade de Terapia Intensiva Neonatal (UTIN), da Maternidade Escola Assis Chateaubriand â MEAC, na cidade de Fortaleza-CearÃ. A amostra foi constituÃda de 42 RNPTs que atenderam aos seguintes critÃrios de inclusÃo: ter peso &#8804; 1.500 gramas e idade gestacional &#8804; 32 semanas; permanecer na unidade durante pelo menos sete dias; nÃo apresentar malformaÃÃes graves que afetassem a integridade da pele; e o consentimento dado pelos pais e/ou responsÃveis pelos RNs. As variÃveis do estudo foram peso, balanÃo hÃdrico, densidade urinÃria, controle da glicemia, dosagem do sÃdio e a cota hÃdrica diÃria. Com os dados compilados no Excel e a anÃlise estatÃstica no programa SPSS. O nÃvel de significÃncia adotado no estudo foi 5% e os dados foram apresentados em tabelas e quadros. Todas as recomendaÃÃes Ãticas foram seguidas durante as etapas da pesquisa. Todos os RNPTs foram admitidos do Centro ObstÃtrico e os diagnÃsticos mÃdicos principais foram: prematuridade, sÃndrome do desconforto respiratÃrio e doenÃa da membrana hialina. Os RNPTs do GI e GC permaneceram em incubadora de parede dupla (100%), sob ventilaÃÃo mecÃnica (95,2%) e (100%), em uso de hidrataÃÃo venosa por acesso central (81%) e (100%), comumente, faziam uso de antibioticoterapia, nutriÃÃo parenteral (71,4%,) e (95,2%), alimentaÃÃo enteral (81%) e (61,9%), fototerapia (71,4%) e (66,7%) respectivamente. Em relaÃÃo ao peso pode-se constatar que grupo de intervenÃÃo (GI) ocorreu um decrÃscimo do peso de 20g diÃrio e o grupo controle (GC), o decrÃscimo de peso foi de 18g. Quanto à diurese, os dados mostraram que a regressÃo à estatisticamente significativa. Quanto à glicemia evidenciou-se que o GC teve 4,4 vezes mais episÃdios de hiperglicemia do que o GI. Os resultados em relaÃÃo à cota hÃdrica nos mostraram uma regressÃo de 7,220 para o GI, enquanto que para o GC foi de 6,094. O que se pÃde observar em relaÃÃo aos resultados da densidade urinaria foi que o GI teve ligeiro decrÃscimo de apenas 0,777, enquanto que no GC houve aumento, a cada dia, de 22,892, ou seja, este grupo apresentou maior densidade urinÃria do que o GI. Em relaÃÃo ao sÃdio mostrou que o GI teve regressÃo em torno de 0,603, enquanto o GC apresentou regressÃo de 1,835. Podemos constatar que os RNs do GC tiveram 3,0 vezes mais chances de ter hipernatremia que os RNs do GI no decorrer dos sete dias. Podemos constatar que, no decurso de aplicaÃÃo da membrana semipermeÃvel, os RNPTs do GI tiveram uma diminuiÃÃo de nÃveis de sÃdio e de exigÃncias fluidas diÃrias, como tambÃm apresentaram menores episÃdios de hiperglicemia e a densidade urinÃria foi mantida dentro dos padrÃes de normalidade. A membrana semipermeÃvel Ã, de fato, um recurso terapÃutico eficaz para minimizar as perdas de Ãgua transepidÃrmicas nos RNPTs. / Care delivery to newborn infants at the intensive care unit demands theoretical-practical knowledge on skin care, as different procedures lead to the breaking of this protective barrier and can cause severe injuries. Moreover, skin maturity needs to be stimulated in premature infants. Thus, this study aimed to examine the efficiency of the semipermeable membrane as a technological resource for use on premature newborn infantsâ (PMNI) skin to reduce transepidermal water loss and electrolyte disorders. This experimental study is a randomized clinical trial and was carried out at the Neonatal Intensive Care Unit (NICU) of the Teaching Maternity Assis Chateaubriand â MEAC in Fortaleza-CearÃ, Brazil, between March and August 2008. The sample included 42 PMNI who complied with the following inclusion criteria: birth weight &#8804; 1,500 grams and gestational age &#8804; 32 weeks; permanence of at least seven days at the unit; no severe malformations that affected skin integrity; and the consent of parents and/or persons responsible for the infants. The study variables were weight, water balance, urine density, glucose control, sodium dosage and daily water quota. The data were compiled in Excel and statistical analysis was performed in SPSS. A five-percent significance level was adopted and data were presented in tables and charts. All ethical recommendations were followed during all research phases. All PMNI were admitted from the Obstetric Center and the main medical diagnoses were: prematurity, respiratory discomfort syndrome and hyaline membrane disease. The PMNI were accommodated in a double wall incubator (100%), received mechanical ventilation (95,2%) and (100%), used intravenous hydration via central access (81%) and (100%) , commonly antibiotics therapy, parenteral nutrition (71,4%) and (95,2%), enteral feeding (81%) and (61,9%) , phototherapy (71,4%) and (66,7%). As to birth weight, a daily weight loss of 20g occurred in the intervention group (IG), against 18g in the control group (CG). What diuresis is concerned, data showed a statistically significant regression. As for glucose, 4,4 times more episodes of hyperglycemia were evidenced in CG than in IG. The results for the water quota showed a regression of 7,220 for IG, against 6,094 for CG. What the urine density results is concerned, a slight decrease of only 0,777 was found for IG, against a daily increase of 22.892 for CG, that is, the latter presented higher urine density than IC during the seven days. As to sodium, regression for IG was around 0,603, against 1,835 for CG. Infants in CG had 3.0 times higher chances of hypernatremia in the study period. It was found that the application of the semipermeable membrane, the PMNI for IG was associated with decreased sodium levels and daily fluid demands during the first week of life in PMNI, who also presented less episodes of hyperglycemia and whose urine density was maintained within normal standards in comparison with PMNI in CG. The semipermeable membrane is actually an effective therapeutic resource to minimize transepidermal water losses in PMNI.

Os acessos venosos são indispensáveis para assistência do paciente em situação crítica. O cateter venoso central (CVC) é um acesso que viabiliza a terapêutica dessa clientela, mas o seu uso pode levar à infecções. Estas infecções ocasionam maior permanência hospitalar, elevam os custos totais das instituições e aumentam a morbidade e a mortalidade do paciente. O uso de curativos como cobertura do sítio de saída do CVC é eficaz na prevenção das infecções relacionadas a estes cateteres, em particular, o uso de curativos impregnados com antissépticos como o curativo gel de clorexidina. Este estudo teve como objetivo comparar a efetividade do curativo gel de clorexidina com a do filme transparente de poliuretano na prevenção da colonização do cateter venoso central em pacientes adultos críticos. Trata-se de estudo experimental, do tipo ensaio clínico randomizado, com tratamentos em paralelo, prospectivo e monocêntrico, realizado de acordo com as recomendações do Consolidated Standards of Reporting Trials (CONSORT). O estudo foi realizado na Unidade de Terapia Intensiva e na Unidade Coronariana de um hospital de ensino do interior do Estado de São Paulo. Participaram do estudo 102 indivíduos hospitalizados nestes locais, divididos aleatoriamente em dois grupos: grupo intervenção, no qual o tipo de cobertura utilizada foi o curativo de gel de clorexidina e grupo controle, que utilizou como cobertura o filme transparente de poliuretano. O desfecho primário mensurado foi a colonização do cateter e os desfechos secundários foram a infecção clínica do sítio de saída, a infecção microbiológica do sítio de saída e a infecção da corrente sanguínea relacionada ao cateter. Para a coleta de dados foi elaborado um instrumento, e este validado quanto ao seu conteúdo e forma por 13 enfermeiros pertencentes aos locais do estudo. Estes profissionais foram treinados para a realização dos curativos e coleta das pontas dos cateteres centrais, swabs dos sítios de saída e hemoculturas. Análises descritivas foram usadas para todas as variáveis do estudo. O teste Exato de Fisher foi utilizado para comparar as proporções de cada desfecho nos grupos de intervenção e controle, e a regressão logística para explorar se a colonização no CVC poderia ser associada com o tempo de uso do cateter e com o Acute Physiology and Chronic Health Evaluation II (APACHE II) dos pacientes do estudo. De acordo com os resultados não houve diferença estatisticamente significante entre a colonização nos dois grupos (p valor = 1.00), para a infecção microbiológica do sítio de saída (p valor = 0.08), para a infecção clínica do sítio de saída (p valor = 0.77) e para as infecções da corrente sanguínea relacionadas ao cateter (p valor = 1,00). Conclui-se que o presente estudo pode contribuir para que as unidades de saúde tenham subsídios para realizar a escolha do tipo de curativo baseado em suas necessidades institucionais e no desenvolvimento de protocolos relacionados à medidas de inserção e manutenção do cateter, bem como medidas educativas permanentes / The venous access is essential to patient care in critical condition. The central venous catheter (CVC) is an access point that allows the treatment of patients, but its use can lead to infections. These infections increase the period of hospital permanence, the total costs of institutions and the patients\' morbidity and mortality. The use of dressings for coverage of the CVC exit-site is effective in preventing infections related to these catheters, in particular, the use of dressings impregnated with antiseptics such as chlorhexidine gel. This study aimed to compare the effectiveness of chlorhexidine gel dressing with the transparent polyurethane film in preventing colonization of central venous catheter in critical adult patients. This randomized experimental study with parallel treatment, prospective and monocentric, which is conducted according to the Consolidated Standards of Reporting Trials (CONSORT) guidelines. The research was performed in an Intensive Care Unit and in a Coronary Care of a teaching hospital in the interior of the State of São Paulo. The study included 102 patients hospitalized in these units, randomly divided into two groups: the intervention group, which used chlorhexidine gel dressing and the control group, which used the transparent polyurethane film dressing. The primary outcome measured was the colonization of the catheter and the secondary outcomes were the clinical infection and microbial infection of the exit-site and the catheter-related bloodstream infection. Data were collected through an instrument developed and validated in terms of content and form by 13 nurses of the Units where the study was performed. These professionals were trained to use the dressings and to collect the tips of central catheters, swabs of the exit-site and blood cultures. Descriptive statistics were used for all study variables. The Fisher\'s exact test was used to compare the proportions of each outcome in the groups of intervention and control. The logistic regression analysis was used to explore if the colonization of the CVC could be associated with the catheter usage time and the Acute Physiology and Chronic Health Evaluation II (APACHE II) of the research\'s participants. According to the results there was no statistically significant difference between colonization in both groups (p value=1:00), for exit-site microbial infection (p value=0:08), for exit- site clinical infection (p value = 0.77) and for catheter-related bloodstream infection (p-value=1.00). The results of this study may contribute in providing subsidies to health units to make the choice in the use of the type of dressing based on their institutional needs and in the development of protocols related to integration measures and maintenance of the catheter, as well as permanent educational measures