Chiral Mo and W Complexes bearing Oxazoline-Cyclopentadienyl Ligands

Trabalho apresentado em 3rd EuCheMS Chemistry Congress, 29 August - 2 September 2010, Nürnberg, GermanyN/

Contributos para o desenvolvimento da literacia: a aprendizagem da leitura e da escrita ao longo do 1º ciclo do ensino básico

Este projecto tem por objectivo principal estudar as relações entre a implementação de um programa de promoção de competências de leitura e a aquisição da leitura e da escrita ao longo do primeiro ciclo. O programa foi desenvolvido no ano lectivo 2000/01 junto de um grupo de crianças com 5 anos de idade, envolvendo jardins de infância e famílias. As crianças foram avaliadas no final do ensino pré-escolar e durante o 1º ano de escolaridade. As análises então efectuadas enfatizaram a relação entre a participação da família no programa e o desenvolvimento de competências linguísticas, de descodificação da leitura e codificação da escrita. Durante o ano 2003/04 foram avaliadas cerca de 60 crianças frequentando o 3º ano de escolaridade. Este grupo de crianças incluía aquelas crianças que tinham frequentado o programa atrás citado. Privilegiou-se, nesta fase, a análise dos processos envolvidos na compreensão de textos lidos. Esta comunicação pretende descrever o trabalho efectuado ao longo deste ano lectivo enfatizando os resultados sobre as possíveis relações entre os processos agora avaliados e a participação no programa implementado no final do ensino pré-escolar

A era do ouro líquido: tratamento de rizartrose com infiltração autóloga de tecido adiposo

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Molybdenum(II) Diiodo-Tricarbonyl Complexes Containing Nitrogen Donor Ligands as Catalyst Precursors for the Epoxidation of Methyl Oleate

Resumo alargado de "Molybdenum(II) Diiodo-Tricarbonyl Complexes Containing Nitrogen Donor Ligands as Catalyst Precursors for the Epoxidation of Methyl Oleate"Com o apoio RAADRI

Surface Energy and Lewis Acid-base Characteristics of Lignocellulosic Fibers upon Modification by Chemical Vapor Deposition of Trichloromethylsilane: An Inverse Gas Chromatography Study

Supplemental data for this article can be accessed on the publisher’s website at http:// dx.doi.org/10.1080/02773813.2018.1454961The surface of a thermomechanical pulp (TMP), containing 26 wt% of lignin, was modified by silanization with trichloromethylsilane (TCMS) via chemical vapor deposition, and thoroughly analyzed for its physicochemical properties by inverse gas chromatography (attenuated total reflection-Fourier transform infrared spectroscopy and X-ray photoelectron spectroscopy being used as complementary tools). For a 2-min TCMS-treated TMP, a decrease of the dispersive component of the surface energy from 38 to 14 mJ m−2 (at 40°C), and, at the same time, an increase of the Lewis acidic and Lewis basic characters were found. The surface of this sample, modified in a high extent, was similar to that of a bleached kraft pulp (<0.1 wt% of lignin) subjected to the same silanization process, which is suggested as being due, in both cases, to the formation of a methyl-silica coating on the fiber’s surface. The new silanized fibers obtained from cheap TMP can be used for the production of a new generation of biocomposites with a variety of matrices

Massive Osteolytic Lesion of the Femur after Total Knee Arthroplasty.

Various failure mechanisms have been identified in total knee arthroplasty (TKA). We hereby present one case of failure, which stands out because of its rapid and destructive progression. We report the case of a 72-year-old Caucasian female patient who developed a large bone osteolytic lesion of the femur after TKA. The patient presented to our hospital 7 years after the initial surgery, complaining of persistent knee pain. The lesion affected the distal half of the femur and, after a diagnostic workup, required a resection of 20 cm and reconstruction with a tumor prosthesis. Subsequent pathological analysis revealed a reaction to cement and prosthesis components. Periprosthetic osteolysis continues to be a major problem, and a reaction to cement and prosthesis components can be an elusive cause of TKA failure.info:eu-repo/semantics/publishedVersio

Comorbilidades no doente ortopédico

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An insight on the role of photosensitizer nanocarriers for Photodynamic Therapy

Photodynamic therapy (PDT) is a modality of cancer treatment in which tumor cells are destroyed by reactive oxygen species (ROS) produced by photosensitizers following its activation with visible or near infrared light. The PDT success is dependent on different factors namely on the efficiency of the photosensitizer deliver and targeting ability. In this review a special attention will be given to the role of some drug delivery systems to improve the efficiency of tetrapyrrolic photosensitizers to this type of treatment.publishe

Enhancing bacterial photodynamic inactivation through combined action of potassium iodide and cationic phthalocyanines

Infectious diseases remain a leading cause of death all around the world. Over the last three decades, the alarming and escalating emergence of antibiotic-resistant bacterial strains has caused some concern among the scientific community [1,2]. Photodynamic inactivation (PDI) emerges as an alternative for inactivating microorganisms, including bacteria [1–3]. The use of phthalocyanine (Pc) derivatives as photosensitizers (PS) in PDI has already proven effectiveness against various microorganisms [4]. Moreover, the addition of KI as a coadjutant can, in certain circumstances, enhance the efficiency of neutral, negative, and positively charged PS against Gram-negative and Gram-positive bacteria [2,4]. In this study will be demonstrated the effect of KI in PDI of E. coli and S. aureus with cationic Pcs bearing tris(trimethylammoniummethyl) or pyridinium-pyrazolyl groups.info:eu-repo/semantics/publishedVersio