Polyamide/TiO2 nanocomposite membranes applied to the degradation of dyes from textile industry

Electrospinning is a technique used to produce high porous fibre membranes with high permeability, small pore size, high specific surface area, good interconnectivity between the pores and suitable mechanical properties. The application of nanomaterials in membranes allows designing and creating advanced membranes that have been carefully tailored to meet specific requirements Electrospinning polymer solution containing a nanophotocatalyst can be employed as alternative to immobilize the photocatalyst on nanofiber web, to increase surface area for photocatalytic activity. Nanofibers of polyamide with different amounts of TiO2 were obtained by electrospun and the photocatalytic activity was measure. The efficient performance of the photocatalytic nanofibers is mainly achieved by the synergetic combination of a highly porous structure and a high surface area. The full advantage of the new membranes in water treatment are the lower feed pressure, the higher permeate flux with a drastically reduction in energy consumption and fouling diminution. The membranes are applied in the degradation of textiles wastewaters and the sustainability of the treatment is evaluated

Anesthesia and Rheumatoid Arthritis

SummaryBackground and objectivesRheumatoid arthritis (RA) is a chronic inflammatory disease of unknown etiology. It is known that RA patients have a reduced life expectancy when compared with the general population. Rheumatic diseases are numerous and occur with high variability; some of them develop very rapidly while others occur chronically provoking disability throughout life. Anesthetic risks in osteoarticular disorders involve not only the mechanical deformations caused by the disease, but also the cardiovascular, respiratory, renal, and digestive systems.ContentsThe purpose of this review was to stress the importance of stages in disease process that may affect anesthesia control before, during, and after surgery, highlighting the authors’ experience in a retrospective review of patients with juvenile rheumatoid arthritis (JRA) undergoing placement of orthopedic prosthesis with emphasis on intubation techniques.ConclusionsRheumatoid arthritis patients can present a number of complex problems for the anesthesiologist. This requires careful preoperative evaluation; anesthesia requires experience with the technique; and postoperative care should be judiciously chosen to meet the specific needs of the patient. The procedure requires effective communication among surgeon, rheumatologist and anesthesiologist so each member of the multidisciplinary team can contribute with his/her expertise in order to better benefit the patient

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Editoria

Effects of Gabaergic phenols on phospholipid bilayers as evaluated by 1H-NMR

The phenols propofol and thymol, and lately carvacrol, eugenol and chlorothymol, have been shown to act as positive allosteric modulators on GABAA receptor, which is the main inhibitory receptor of the central nervous system. GABAA receptor is an intrinsic membrane protein which activity may be affected by surface-active compounds and by physical changes in the membrane. Recently, we demonstrated that these phenols interacted with the lipid membrane phase, suggesting their anesthetic activity could be the combined result of their specific (with receptor proteins) as well as nonspecific (with surrounding lipid molecules) interaction modulating the supramolecular organization of the receptor environment. In the current study, by using 1H-NMR spectroscopy, we have investigated the effects of the insertion and the possible preferential location of the five phenol derivatives with GABAergic activity on EPC membranes. The results indicate that all compounds are able to insert in EPC phospholipid vesicles and to locate in the region between the polar group (choline molecule), the glycerol and the first atoms of the acyl chains, being the more lipophilic compounds (propofol and chlorothymol) that seem to prefer a deeper bilayer insertion. The location of the phenol molecules would reduce the repulsive forces among phospholipids head groups allowing closer molecular packing and finally diminishing the mobility of the hydrocarbon chains, as revealed by 1H spin relaxation times.Fil: Reiner, Gabriela de Las Nieves. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Córdoba. Instituto de Investigaciones Biológicas y Tecnológicas. Universidad Nacional de Córdoba. Facultad de Ciencias Exactas, Físicas y Naturales. Instituto de Investigaciones Biológicas y Tecnológicas; Argentina. Universidade Estadual de Campinas; Brasil. Universidade Estadual Paulista Julio de Mesquita Filho; BrasilFil: Fraceto, Leonardo Fernandes. Universidade Estadual Paulista Julio de Mesquita Filho; BrasilFil: Paula, Eneida de. Universidade Estadual de Campinas; BrasilFil: Perillo, Maria Angelica. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Córdoba. Instituto de Investigaciones Biológicas y Tecnológicas. Universidad Nacional de Córdoba. Facultad de Ciencias Exactas, Físicas y Naturales. Instituto de Investigaciones Biológicas y Tecnológicas; ArgentinaFil: Garcia, Daniel Asmed. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Córdoba. Instituto de Investigaciones Biológicas y Tecnológicas. Universidad Nacional de Córdoba. Facultad de Ciencias Exactas, Físicas y Naturales. Instituto de Investigaciones Biológicas y Tecnológicas; Argentin

Cultura de preservação: o patrimônio histórico na cidade de Caçapava - SP

This work aims to present some general questions about historical heritage, especially in urban space, as an act of preservation of identity, in an international context and also in relation to Brazil and the State of São Paulo. In particular, it is focused in the city of Caçapava, in the Paraíba Valley, with an analysis of the present preservation conditions, through a comparative exercise between the photographs made for the survey carried out in 1978 by the Architect Gustavo Neves da Rocha Filho, on one side; and photographs taken in the current context of the city, on the other.O presente trabalho visa apresentar algumas questões gerais sobre o patrimônio histórico, especialmente bens imóveis no espaço urbano, como ato de preservação da identidade, num contexto internacional e também no que se refere ao Brasil e ao Estado de São Paulo. Volta-se, no entanto, especificamente, para a cidade de Caçapava, no Vale do Paraíba, com uma análise das condições de preservação atuais, através de um exercício comparativo entre as fotografias realizadas para o levantamento efetuado no ano de 1978, pelo Arquiteto Gustavo Neves da Rocha Filho, de um lado; e fotografias realizadas no contexto hodierno da cidade, de outro.Dados abertos - Sucupira - Teses e dissertações (2019