Fragmentation of biomass-templated CaO-based pellets

The use of biomass templating materials with a cheap production method as an enhanced sorbent for CO2 uptake has been proposed recently. However, the attrition and fragmentation behaviour of this type of material, which is a vital parameter for calcium looping sorbents, has not yet been investigated in detail. In this work the fragmentation behaviour of biomass-templated sorbents is investigated. Three types of materials were prepared using a mechanical pelletiser: 1. lime and cement (LC); 2. lime and flour (LF); and 3. lime, cement and flour (LCF). These samples were heat treated in a pressurised heated strip reactor (PHSR) and in a bubbling fluidised bed (BFB) and changes in particle size distribution were measured to assess fragmentation. Results indicated that the addition of biomass enhances the propensity to undergo fragmentation. Upon heat treatment in the PHSR the particle size of LC was not modified significantly; on the contrary the mean particle diameter of LF decreased from 520 μm to 116 μm and that of LCF from 524 μm to 290 μm. Fragmentation tests in the BFB confirmed the trend: 67% of the particles of LF fragmented, against 53% of LCF and 18% of LC samples. The addition of cement to the LF samples partially counteracts this performance degradation with respect to attrition. However, calcium aluminate pellets (LC) showed the lowest rate of fragmentation amongst all of the samples tested

Biblioteca Recuperada: La Batalla por la memoria. Valparaíso, 1973

Recovered Library: The Battle for Memory. Valparaíso, 197

Biblioteca Recuperada: La Batalla por la memoria. Valparaíso, 1973

Recovered Library: The Battle for Memory. Valparaíso, 197

Improved thrombin binding aptamer by incorporation of a single unlocked nucleic acid monomer

A 15-mer DNA aptamer (named TBA) adopts a G-quadruplex structure that strongly inhibits fibrin-clot formation by binding to thrombin. We have performed thermodynamic analysis, binding affinity and biological activity studies of TBA variants modified by unlocked nucleic acid (UNA) monomers. UNA-U placed in position U3, U7 or U12 increases the thermodynamic stability of TBA by 0.15–0.50 kcal/mol. In contrast, modification of any position within the two G-quartet structural elements is unfavorable for quadruplex formation. The intramolecular folding of the quadruplexes is confirmed by Tm versus ln c analysis. Moreover, circular dichroism and thermal difference spectra of the modified TBAs displaying high thermodynamic stability show bands that are characteristic for antiparallel quadruplex formation. Surface plasmon resonance studies of the binding of the UNA-modified TBAs to thrombin show that a UNA monomer is allowed in many positions of the aptamer without significantly changing the thrombin-binding properties. The biological effect of a selection of the modified aptamers was tested by a thrombin time assay and showed that most of the UNA-modified TBAs possess anticoagulant properties, and that the construct with a UNA-U monomer in position 7 is a highly potent inhibitor of fibrin-clot formation

Transferencia de tecnologia e seus efeitos no sistema de franchising

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Mães que perdem seus filhos na justiça

Orientador: Claudio Eduardo Muller BanzatoDissertação (mestrado) - Universidade Estadual de Campinas, Faculdade de Ciencias MedicasResumo: Trata-se de um estudo psicossocial das famílias que softeram a perda do pátrio poder, visando caracterizá-las, bem como identificar possíveis fatores associados a este desfecho. Os dois grupos constituídos (estudo e comparativo) foram estudados quali-quantitativamente. Formou-se, por 27 mães que perderam o pátrio poder, por colocar os filhos em situação de risco psicofisico. O grupo comparativo constituiu-se de 17 mães, cujos filhos foram afastados por ordem judicial mas, depois das sentenças, retomaram às suas famílias de origem. Os instrumentos utilizados foram: anamnese-questionário, composto por questões abertas e fechadas, com a pretensão de levantar os dados demográficos e sociais e as histórias de vida das mães que foram destituídas do pátrio poder. Os resultados mostraram que depende este desfecho de uma complexa interação de fatores, abrangendo a pobreza, a violência doméstica, o uso problemático de álcool e droga e a não-adesão a tratamentos clínicos e psicossociais. Dentre os fatores associados ao retomo da criança a sua família natural destaca-se, após encaminhamento efetuado,a procura de acompanhamento especializado e adesão ao mesmoAbstract: This is a psychosocial study of families who suffered with the loss of the custody of their children, aiming to characterize them as well as to identify possible factors associated with this denouement. The two groups constituted (study and comparative) were quality-quantitatively studied. The study group was constituted by 27 mothers who lost the custody of their children for putting them in situation of psychosocial risk. The comparative group was constituted by 17 mothers, whose children were taken away by judicial order, but returned to their origin families after the sentences. The instruments utilized were: anamnesis-questionnaire compounded by open and close questions with the intention of raising demographic and social data and life history of those mothers who were destitute of their custody. The results showed that this denouement depends on a complex interaction of factors, involving poverty, domestic violence, the problematic use of alcohol and drugs and the lack of adherence to clinic and therapeutic treatments. Among the factors associated with the returning of the child to her natural family, it highlights, after providing directions, a simultaneous specialized assistance and adherenceMestradoCiencias BiomedicasMestre em Ciências Médica

Thirty-Five-Year-Old Woman with Signet Ring Cell Gastric Carcinoma Secondary to the Chernobyl Nuclear Accident: A Case Report

The 1986 Chernobyl nuclear accident resulted in radiation exposures throughout much of Europe, with the highest exposures within the city of Pripyat, Ukraine, where the accident occurred. We report a woman who was exposed to the Chernobyl accident at age 13. Beginning in her early thirties, she experienced several years of upper abdominal pain that became progressively more severe. At age 35, she underwent upper endoscopy and gastric biopsy. Histological examination revealed a signet ring cell (SRC) gastric carcinoma. The tumor was discovered at an advanced stage and proved unresectable. She died 3 months following her diagnosis. The mean age for SRC gastric carcinoma diagnosis is about 62 years; the median survival following diagnosis is 13 months. The early appearance and aggressive clinical course of this malignancy in relation to the Chernobyl nuclear accident is discussed

Defeito completo do septo atrioventricular com cianose

Os defeitos do septo atrioventricular total (DSAVT) representam 4% das mal formações cardíacas e acima de 50% dos defeitos observados na síndrome de Down (SD)¹. A apresentação clínica é de insuficiência cardíaca precoce na infância e hipertensão pulmonar por hiperfluxo. Raramente a cianose é observada e sugere hipertensão pulmonar ou associação à tetralogia de Fallot³, dupla via de saída de ventrículo direito², anomalia de Ebstein4, drenagem anômala de cava esquerda persistente em átrio esquerdo (Barbero Marcial, comunicação pessoal). Crianças com SD são particularmente difíceis de avaliação por apresentarem obstrução de vias aéreas superiores, que podem contribuir com o aumento da resistência pulmonar observada no cateterismo cardíaco. A presença de cianose pré-operatória constitui-se um desafio ao tratamento cirúrgico devido ao risco de hipertensão pulmonar irreversível com falência ventricular direita com, a correção dos defeitos intracardíacos