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Influência de diferentes aditivos nucleantes na morfologia e nas propriedades do polipropileno moldado por injeção
(Universidade Federal de São Carlos, 2018-10-25) Abreu, Andressa Argani; Lucas, Alessandra de Almeida; https://lattes.cnpq.br/9754332336954137
Samples of a polypropylene (PP) homopolymer were nucleated with three different nucleating agents: 1,3:2,4-bis (3,4-dimethylobenzylideno) sorbitol (DMDBS), bis(4-propylbenzylidene) propilsorbitol (propilsorbitol), and lithium 2,2-methylene-bis (4,6- di-tert-butylphenyl) phosphate (lithium organophosphate) at different concentrations. The influence of these additives on the PP morphology was studied by polarized light optical microscopy (PLOM) with hot stage, atomic force microscopy (AFM), differential scanning calorimetry (DSC) wide angle x-ray diffraction (WAXD), and small angle x-ray scattering (SAXS). The influence of these additives in flow induced crystallization was verified through rheological analysis, optical, mechanical and thermomechanical properties were also evaluated. An increase in lamella thickness and long period was verified in nucleated samples by SAXS, and rheological analysis revealed that pure PP is more sensitive to flow-induced orientation than nucleated samples. Microscopy analysis showed that the crystalline morphology of nucleated PP is formed by a fibrillar transcrystalline structure, which reduces the interaction of the crystalline phase with visible light, and the sample containing lithium organophosphate forms the structure with most refined fibrils. All nucleating agents, in every concentration evaluated, proved to be efficient regarding the beginning of crystallization, improving optical properties and enhancing the polymer stiffness. However, changes in the concentration of the additives DMDBS and propilsorbitol influenced some of the final properties of the samples, while the sample containing lithium organophosphate did not show variations, regardless of the additive content used. It can be said that lithium organophosphate provides a better cost-benefit than the other nucleating agents evaluated, once a smaller amount of additive is needed to achieve similar results
Caracterização fenotípica e molecular dos mecanismos de resistência aos beta-lactâmicos em linhagens clínicas de Klebsiella pneumoniae isoladas do Amazonas
(Universidade Federal de São Carlos, 2018-10-25) Souza, Rosineide Cardoso de; Camargo, Ilana Lopes Baratella da Cunha; https://lattes.cnpq.br/4104096171600845; https://lattes.cnpq.br/5739753892325187
Klebsiella pneumoniae resistant to beta-lactams are present in hospitals worldwide and reduce treatment alternatives. In this study, 40 K. pneumoniae isolates were characterized. All of them were resistant to beta-lactam antibiotics and classified as multidrug resistant. Among these, eight isolates were resistant to carbapenems and six of which had the gene blaKPC-2, encoding the enzyme Klebsiella pneumoniae carbapenemase (KPC). The blaTEM and blaCTX-M genes were found in 80% of the samples. The 40 isolates were grouped into 12 pulses (A to L) according to the genetic similarity determined by the DNA macro-restriction followed by pulsed-field gel electrophoresis. A total of 20 isolates were classified as pulsotype A, which was subdivided into 13 subtypes (A1 to A13), with subtype A1 being the most prevalent. Representatives of pulsotype A belong to the ST11, clonal complex CC258. In this study, we identified four new STs: ST2540, ST2308, ST2258, and ST2307. AMKP5 and AMKP2, belonging to subtypes A7 and A8, respectively, are resistant to carbapenems but did not present the blaKPC gene. Sequencing of the AMKP5 genome indicated mutations in the C-terminal region of the OmpK36 porin which may alter the entry of carbapenems into the cell. Genome sequencing of the AMKP10 isolate identified the plasmid pAMKP10, with 48.454 bp belonging to the IncX5 incompatibility group. In this plasmid, the blaKPC-2 gene was found in a non-Tn4401 genetic element (NTEKPC) containing tnpA-ISEc63-like / tnpR-Tn3 / tnpA-ISKpn27 / blaKPC-2 / ΔISKpn6, based on Tn1722. All isolates with the blaKPC-2 gene had the same plasmid. Conjugation of this plasmid to Escherichia coli J53 occurred from ST11 isolates with low conjugation frequencies (8.23 x 10-12 to 1.31 x 10-7) resulting in resistance to carbapenems. Finally, the outbreak of carbapenem-resistant K. pneumoniae resistant of this Amazonian hospital involved the transfer of the NTEKPC-containing pAMKP10 between two lineages (ST11 and ST2302) but was largely due to the clonal dissemination of the ST11 endemic lineage.
Efeitos do treinamento dos músculos do assoalho pélvico individual versus individual com progressão para grupo versus em grupo para mulheres com incontinência urinária de esforço: ensaio clínico randomizado
(Universidade Federal de São Carlos, 2018-10-25) Figueiredo, Vilena Barros de; Driusso, Patricia; https://lattes.cnpq.br/8898319491890063; https://lattes.cnpq.br/6372731373304247
The International Continence Society has defined urinary incontinence (UI) as any involuntary loss of urine, which can be classified into several types, most commonly reported in the literature are stress urinary incontinence, urge incontinence and mixed incontinence (association between stress symptoms and urgency). Pelvic floor muscle training (TMAP) is recommended as the first conservative treatment option for urinary incontinence in women and can be practiced individually or in a group. This thesis was composed by two studies. Study I aimed to: Evaluate the effects of individual physical therapy versus individual treatment with group progression versus group-only training in women with stress urinary incontinence. This was a randomized clinical trial. Ninety women over 18 years of age and with complaints of stress urinary incontinence (including those who had complaints of mixed urinary incontinence) were included. The mean age of study participants was 53 ± 12.5 years. After the intervention, the severity measurement improved in all three groups (p <0.001). The benefits of TMAP were maintained 3 and 6 months after completion of supervised training. The groups whose individual and individual training with progression to the group had a significant improvement in pelvic floor muscle function when compared to that trained only in the group after 12 training sessions (p <0.001). Study II aimed to evaluate the responsiveness of Pelvic Floor Distress Inventory-20 (PFDI-20) and Pelvic Floor Impact Questionnaire-7 (PFIQ-7) questionnaires. These questionnaires were designed to evaluate the occurrence of pelvic floor dysfunctions and how much these dysfunctions affect the quality of life. This was a prospective observational study with 72 women with urinary incontinence. The participants answered the questionnaires PFDI-20 and PFIQ-7 before and after the TMAP. Seventy-two women (mean age 51.8 ± 11.9) with stress urinary incontinence (n = 33) and mixed urinary incontinence (n = 39) were recruited. PFDI-20 and PFIQ-7 Portuguese version (Brazil) presented moderate responsiveness after TMAP and can be safely used by physiotherapists to use them in their practices.
Produção de concretos autoadensáveis com baixo consumo de cimento e sua influência na aderência aço-concreto
(Universidade Federal de São Carlos, 2018-10-25) Barboza, Lucas da Silva; Almeida Filho, Fernando Menezes de; https://lattes.cnpq.br/0447825383222965; https://lattes.cnpq.br/1159705362571916
Self-compacting concrete (SCC) must simultaneously exhibit high fluidity, cohesion and absence of segregation. However, the maintenance of these properties in the fresh state requires a greater consumption of binders and additions, and consequently generating a cost increase in the manufacture of the concrete. In this context, the present work seeks to evaluate the feasibility of the production of Self-Adhesive Concretes with Low Cement Consumption (SCCLCC), determining their properties in the fresh and hardened state. Appropriate inputs for the CAABCC dosage were selected, characterized and the optimal voids index at the packaging step between the aggregates determined. Self-compacting concrete with reduced cement content, with high compressive strength and cement consumption indices of 4.50 to 5.45 kg / m³. MPa-1 at 28 days were reached, in which these values are below those obtained for this type of concrete. These results demonstrate that even under low cement content dosing conditions, the properties in the fresh and hardened state were maintained, thus not suffering significant losses in relation to the reference concrete. Therefore, the results indicate that SCCLCC production with the necessary flowability, satisfactory resistance and reduced cement consumption is feasible. This makes SCC more efficient, with significant cost reductions and environmental impact without compromising its properties.
Uma arqueologia do conceito de langue no curso de linguística geral e no proposições para uma semiologia e uma linguística
(Universidade Federal de São Carlos, 2018-10-25) Donatti, Silvério Guazzelli; Signori, Mônica Baltazar Diniz; https://lattes.cnpq.br/5524678730650668; https://lattes.cnpq.br/5543385065293549
The present research will be based on the work of the Archeology of knowledge of Michel Foucault, an analysis of two saussurians discursive formations, with a view to the apprehension of the relations involving the concept of langue present in the works that compose our corpus, namely: the Course of General Linguistics, organized and edited by Charles Bally and Albert Sechehaye in France in 1916, and the Propositions for a Semiology and a Linguistics, a materialistic proposal articulated by Carlos Henrique de Escobar in Brazil in 1973. Our hypothesis was denied of a possible mutual re-elaboration between both discursive formations, through the concept of langue, due to the incompatibilities in the base of the discursive events that surround the concept.