Exploring The Functionalization Ratio Of Mesoporous Silica Glass With Imidazolium Entities On The Synthesis Of Supported Gold Nanoparticles Nanostructured Materials 2012. Special Issue Editors: Juan Manuel Rojo, Vasileios Koutsos

This study describes the surface modification of porous Vycor glass ® (PVG®) with ionic species based on 1-methyl-imidazolium groups, and the posterior utilization of the functional porous substrate to synthesize supported gold nanoparticles (Au NPs). The functionalization degree (amount of imidazolium groups per gram of PVG ®) was successfully controlled by the concentration of the imidazolium-based alkoxysilane in the reaction media. The ion-exchange properties of the functional groups allowed an effective and homogeneous upload of AuCl4 - throughout the monolithic PVG® structure, with subsequent conversion to Au NPs by thermal treatment at 823 K, which also eliminated the organic groups chemically bonded to the surface. The amount of adsorbed AuCl4 - ions was shown to have influence on loading of the Au NPs while no size variation is observed, indicating that the porous environment of PVG® acts as a nanoreactor where the particles are formed in the confined space. © 2013 Springer Science+Business Media Dordrecht.153Alfaya, R.V.S., Fujiwara, S.T., Gushikem, Y., Kholin, Y.V., Adsorption of metal halides from ethanol solutions by a 3-n-propylpyridiniumsilsesquioxane chloride-coated silica gel surface (2004) Journal of Colloid and Interface Science, 269 (1), pp. 32-36. , DOI 10.1016/S0021-9797(03)00611-8Berg, R.W., Raman spectroscopy and ab initio model calculations on ionic liquids (2007) Mon Chem, 138, pp. 1045-1075. , 10.1007/s00706-007-0760-9 10.1007/s00706-007-0760-9 1:CAS:528: DC%2BD2sXht1Gju7zECaiut, J.M.A., Nakagaki, S., Friedermann, G.R., Drechsel, S.M., Zarbin, A.J.G., Nickel(II) and manganese(III) tetraazaannulenes complexes encapsulated in porous Vycor glass (PVG): Investigation of catalytic activity (2004) J Mol Catal A, 222, pp. 213-222. , 10.1016/j.molcata.2004.08.011 10.1016/j.molcata.2004.08.011Cangussu, D., Nunes, W.C., Clm, P., Pedroso, E.F., Mazali, I.O., Knobel, M., Alves, O.L., Stumpf, H.O., Slow magnetic relaxation in (CoCuII)-Cu-II coordination oligomer built into mesoporous material (2008) Eur J Inorg Chem, 24, pp. 3802-3808. , doi: 10.1002/ejic.200800330Cangussu, D., Nunes, W.C., Corrêa, H.L.S., Macedo, W.A.A., Knobel, M., Alves, O.L., Filho, A.G.S., Mazali, I.O., γ-Fe2O3 nanoparticles dispersed in porous Vycor glass: A magnetically diluted integrated system (2009) J Appl Phys, 105, p. 013901. , 10.1063/1.3054173 10.1063/1.3054173Carneiro, N.M., Nunes, W.C., Borges, R.P., Godinho, M., Fernandez-Outon, L.E., Macedo, W.A.A., Mazali, I.O., NiO nanoparticles dispersed in mesoporous silica glass (2010) J Phys Chem C, 114, pp. 18773-18778. , 10.1021/jp1046886 10.1021/jp1046886 1:CAS:528:DC%2BC3cXht12jur7FChen, H., Kou, X., Yang, Z., Ni, W., Wang, J., Shape- and size-dependent refractive index sensitivity of gold nanoparticles (2008) Langmuir, 24, pp. 5233-5237. , 10.1021/la800305j 10.1021/la800305j 1:CAS:528:DC%2BD1cXltVyjs7c%3DCorrea, D.N., Jmde, S., Santos, E.B., Sigoli, F.A., Souza Filho, A.G., Mazali, I.O., TiO2- and CeO2-based biphasic core-shell nanoparticles with tunable core sizes and shell thicknesses (2011) J Phys Chem C, 115, pp. 10380-10387. , doi: 10.1021/jp200540g(2012) VYCOR® Brand Porous Glass 7930 Datasheet, , http://www.corning.com/docs/specialtymaterials/pisheets/Vycor%207930.pdf, Corning Glass datasheet Corning Inc. 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Comparison of lyophilization, and freezing in honey as techniques to preserve cortical bone allografts used to repair experimental femoral defects in domestic adult cats

Cats with orthopedic conditions are a prominent part of the clinical work of veterinary. Conditions such as comminuted fractures, bone tumors and non-unions are often difficult to repair and may require the use of bone grafts for treatment. This study evaluated cortical bone allografts preserved in honey, frozen or lyophilized for correcting long bone defects created in the diaphysis of the right femur of domestic cats (n=24). In the control group (n=6), the defect was repaired using autogenous cortical bone graft. In the remaining animals (n=6/group), the defect was repaired with cortical bone allografts preserved in honey, frozen or lyophilized. Success of graft incorporation and length of time for consolidation were assessed through clinical, radiographic and histological evaluations performed up to 180 days. In the control, frozen, honey and lyophylized groups, respectively, success of graft incorporation was 91.6%, 83.3%, 75%, and 25%, with corresponding mean length of time for consolidation of 83.1, 78, 105 and 120 days. Incorporation percentage in the lyophilized group was significantly lower than in the frozen and control groups. In conclusion, bone grafts preserved in honey or frozen were effective for repairing cortical defects in the femurs of cats as compared to autogenous cortical bone grafts

Precipitation Estimation: From the RAO to EURAINSAT and Beyond

The key objective of the project “Use of the MSG SEVIRI channels in a combined SSM/I, TRMM and geostationary IR method for rapid updates of rainfall” is the development of algorithms for rapid-update of satellite rainfall estimations at the geostationary (GEO) scale. The new channels available with the Spinning Enhanced Visible and Infrared Imager (SEVIRI) radiometer in the visible (VIS), near infrared (NIR) and infrared (IR) portions of the spectrum provide new insights into the microphysical and dynamic structure of precipitating clouds thus allowing for a more precise identification of precipitation intensities. Passive microwave (PMW) radiometers on board low Earth orbiting (LEO) satellites are used to determine information on the vertical cloud structure. Key features of the new method(s) are: 1. Microphysical characterization of precipitating clouds with VIS/IR sensors; 2. Creation of cloud microphysical and radiative databases from cloud model outputs and aircraft penetrations; 3. Tuning of PMW algorithms for different cloud systems (maritime, continental, convective, stratiform,...); 4. Combination of data from different algorithms and application to a rapid update cycle at the GEO scale. The project provided the background for EURAINSAT “European Satellite Rainfall Estimation and Monitoring at the Geostationary Scale”, a research project co-funded by the Energy, Environment and Sustainable Development Programme of the European Commission within the topic “Development of generic Earth observation technologies”. The project web site is accessible at http://www.isac.cnr.it/~eurainsat/. Moreover, it has represented the European framework for the launch of the International Precipitation Working Group (IPWG)

Plantas com possível atividade hipolipidêmica: uma revisão bibliográfica de livros editados no Brasil entre 1998 e 2008 Plants with possible hypolipidemic activity: a review of books published in Brazil between 1998 and 2008

O objetivo deste trabalho foi realizar levantamento sobre as plantas medicinais indicadas para o tratamento da hiperlipidemia, hipercolesterolemia e/ou aterosclerose. Este estudo foi feito a partir da pesquisa bibliográfica em 32 livros publicados no Brasil entre 1998 e 2008, resultando em lista de 85 espécies distribuídas em 53 famílias, principalmente Asteraceae e Fabaceae, com 54 espécies exóticas e 31 nativas. As espécies mais citadas foram Allium sativum (Alliaceae), Cynara scolymus (Asteraceae), Curcuma longa (Zingiberaceae), Allium cepa (Alliaceae), Echinodorus grandiflorus (Alismataceae), Taraxacum officinale (Asteraceae), Vernonia condensata (Asteraceae), Cuphea carthagenensis (Lythraceae) e Curcuma zedoaria (Zingiberaceae). As espécies nativas, citadas em pelo menos 2 livros, foram investigadas para alguma evidencia científica relacionada a possíveis efeitos hipolipidêmico, hipocolesterolêmico e/ou contra aterosclerose. Somente foram encontrados estudos científicos, relacionados a estes efeitos, para as espécies nativas Cuphea carthagenensis e Echinodorus grandiflorum, indicando a necessidade de pesquisas que possam garantir a segurança e a eficácia do uso destas espécies.<br>The aim of this study was to survey medicinal plants indicated for the treatment of hyperlipidemia, hypercholesterolemia and/or atherosclerosis. This study was performed from a review of 32 books published in Brazil between 1998 and 2008, resulting in a list of 85 species belonging to 53 families, especially Asteraceae and Fabaceae, with 54 exotic and 31 native species. The species most often cited were Allium sativum (Alliaceae), Cynara scolymus (Asteraceae), Curcuma longa (Zingiberaceae), Allium cepa (Alliaceae), Echinodorus grandiflorus (Alismataceae), Taraxacum officinale (Asteraceae), Vernonia condensata (Asteraceae), Cuphea carthagenensis (Lythraceae) and Curcuma zedoaria (Zingiberaceae). Native species cited in at least 2 books were investigated for some scientific evidence related to possible hypolipidemic and hypocholesterolemic effects and/or action against atherosclerosis. Scientific studies related to these effects were found only for the native species Cuphea carthagenensis and Echinodorus grandiflorum, indicating the need for studies capable of assuring the safety and the efficacy as to the use of these species