Pontifícia Universidade Católica de Campinas

About: Pontifícia Universidade Católica de Campinas is a education organization based out in Campinas, Brazil. It is known for research contribution in the topics: Population & Context (language use). The organization has 2859 authors who have published 3887 publications receiving 30308 citations.

Cyclohexane oxidation continues to be a challenge

Abstract: Many efforts have been made to develop new catalysts to oxidize cyclohexane under mild conditions. Herein, we review the most interesting systems for this process with different oxidants such as hydrogen peroxide, tert -butyl hydroperoxide and molecular oxygen. Using H 2 O 2 , Na-GeX has been shown to be a most stable and active catalyst. Mesoporous TS-1 and Ti-MCM-41 are also stable, but the use of other metals such as Cr, V, Fe and Mo leads to leaching of the metal. Homogeneous systems based on binuclear manganese(IV) complexes have also been shown to be interesting. When t -BuOOH is used, the active systems are those phthalocyanines based on Ru, Co and Cu and polyoxometalates of dinuclear ruthenium and palladium. Microporous metallosilicates containing different transition metals showed leaching of the metal during the reactions. Molecular oxygen can be used directly as an oxidant and decreases the leaching of active species in comparison to hydrogen peroxide and tert -butyl hydroperoxide. Metal aluminophosphates (metal: Mn, Fe, Co, Cu, Cr V) are active and relatively stable under such conditions. Mn-AlPO-36 yields directly adipic acid, but large amounts of carboxylic acids should be avoided, as they cause metal leaching from the catalysts. Rare earth exchanged zeolite Y also shows good selectivity and activity. In the last part of the review, novel alternative strategies for the production of cyclohexanol and cyclohexanone and the direct synthesis of adipic acid are discussed.

Reflexos da globalização na cultura alimentar: considerações sobre as mudanças na alimentação urbana

Abstract: This paper evaluates the contemporary commensalism focusing particularly upon the impact on urban food changes, based on social science authors who discuss the globalization. It approaches the process whereby foods and services are deterritorialized and achieve a global character, in order to contribute to studies of food changes and to analyze other dimensions of the so-called affluent diet.

Colony-Stimulating Factors for Chemotherapy-Induced Febrile Neutropenia: A Meta-Analysis of Randomized Controlled Trials

Abstract: Purpose Current treatment for febrile neutropenia (FN) includes hospitalization for evaluation, empiric broad-spectrum antibiotics, and other supportive care. Clinical trials have reported conflicting results when studying whether the colony-stimulating factors (CSFs) improve outcomes in patients with FN. This Cochrane Collaboration review was undertaken to further evaluate the safety and efficacy of the CSFs in patients with FN. Methods An exhaustive literature search was undertaken including major electronic databases (CANCERLIT, EMBASE, LILACS, MEDLINE, SCI, and the Cochrane Controlled Trials Register). All randomized controlled trials that compare CSFs plus antibiotics versus antibiotics alone for the treatment of established FN in adults and children were sought. A meta-analysis of the selected studies was performed. Results More than 8,000 references were screened, with 13 studies meeting eligibility criteria for inclusion. The overall mortality was not influenced significantly by the use of CSF (od...

Diretriz Brasileira de Insuficiência Cardíaca Crônica e Aguda.

Abstract: Parte 1: Diretriz Brasileira de Insuficiencia Cardiaca Cronica […] Diretriz Brasileira de Insuficiencia Cardiaca Cronica e Aguda