Carbon aerogel supported platinum catalysts for selective hydrogenation of cinnamaldehyde

This paper describes the preparation and characterization of 1% wt. Pt catalysts supported in carbon aerogels for the application in the liquid-phase selective hydrogenation of cinnamaldehyde. Carbon aerogel supports with different textures were activated with hydrogen peroxide and ammonium peroxydisulfate leading to large amounts of surface groups but keeping unchanged their textural properties. After introducing Pt, the surface chemistry and morphology of the catalysts was characterized by analytical techniques like SEM, TPD, N2 adsorption isotherms, mercury porosimetry and H2 chemisorption. Catalysts prepared with activated aerogels exhibited good selectivity towards the desired product, cinnamyl alcohol. A high temperature post-treatment of the catalysts failed to enhance their selectivity, mainly leading to hydrocinnamaldehyde production

Reduction of blood nitric oxide levels is associated with clinical improvement of the chronic pelvic pain related to endometriosis

The objective of this prospective study was to determine the plasma levels of nitric oxide (NO) in women with chronic pelvic pain secondary to endometriosis (n=24) and abdominal myofascial pain syndrome (n=16). NO levels were measured in plasma collected before and 1 month after treatment. Pretreatment NO levels (μM) were lower in healthy volunteers (47.0±12.7) than in women with myofascial pain (64.2±5.0, P=0.01) or endometriosis (99.5±12.9, P<0.0001). After treatment, plasma NO levels were reduced only in the endometriosis group (99.5±12.9 vs 61.6±5.9, P=0.002). A correlation between reduction of pain intensity and reduction of NO level was observed in the endometriosis group [correlation = 0.67 (95%CI = 0.35 to 0.85), P<0.0001]. Reduction of NO levels was associated with an increase of pain threshold in this group [correlation = -0.53 (-0.78 to -0.14), P<0.0001]. NO levels appeared elevated in women with chronic pelvic pain diagnosed as secondary to endometriosis, and were directly associated with reduction in pain intensity and increase in pain threshold after treatment. Further studies are needed to investigate the role of NO in the pathophysiology of pain in women with endometriosis and its eventual association with central sensitization.484363369CONSELHO NACIONAL DE DESENVOLVIMENTO CIENTÍFICO E TECNOLÓGICO - CNPQSem informaçã

Evaluation Of Endodontic Treatments Performed By Students In A Brazilian Dental School.

The aims of this study were to evaluate the clinical outcomes of root canal treatments performed by final-year students in the Dental School of Piracicaba, State University of Campinas, SP, Brazil, during the year 2000 and to evaluate the success rate of these treatments at follow-ups conducted one and three years later (2001-03). All 579 endodontic treatments performed by final-year students were selected for this investigation. Detailed personal and dental history was obtained from the patient's records. Clinical and radiographic follow-up examinations were performed. For 78.8 percent of the cases, dental caries was recorded as the cause for performing endodontic treatment; for 8.8 percent, prosthetic reasons were given; and for 12.4 percent, failure of the endodontic treatment was the reason. The largest percentage (30.7 percent) of recalled patients was examined after one year; the success rate at this follow-up evaluation ranged from 83 percent to 96 percent depending on the pulp status prior to the root canal treatment. After three years, only 8 percent of treated patients returned; assessment for them revealed a 75.5 percent success rate. Dental caries is still the main reason for endodontic treatment. This level of success of the root canal treatment in a Brazilian dental school is similar to other reports in the literature.69101161117

Genome-wide identification, characterization and expression profiling of the ubiquitin-proteasome genes in biomphalaria glabrata

Biomphalaria glabrata is the major species used for the study of schistosomiasis-related parasite-host relationships, and understanding its gene regulation may aid in this endeavor. The ubiquitin-proteasome system (UPS) performs post-translational regulation in order to maintain cellular protein homeostasis and is related to several mechanisms, including immune responses. The aims of this work were to identify and characterize the putative genes and proteins involved in UPS using bioinformatic tools and also their expression on different tissues of B. glabrata. The putative genes and proteins of UPS in B. glabrata were predicted using BLASTp and as queries reference proteins from model organism. We characterized these putative proteins using PFAM and CDD software describing the conserved domains and active sites. The phylogenetic analysis was performed using ClustalX2 and MEGA5.2. Expression evaluation was performed from 12 snail tissues using RPKM. 119 sequences involved in the UPS in B. glabrata were identified, which 86 have been related to the ubiquitination pathway and 33 to proteasome. In addition, the conserved domains found were associated with the ubiquitin family, UQ_con, HECT, U-box and proteasome. The main active sites were lysine and cysteine residues. Lysines are responsible and the starting point for the formation of polyubiquitin chains, while the cysteine residues of the enzymes are responsible for binding to ubiquitin. The phylogenetic analysis showed an organized distribution between the organisms and the clades of the sequences, corresponding to the tree of life of the animals, for all groups of sequences analyzed. The ubiquitin sequence was the only one with a high expression profile found in all libraries, inferring its wide range of performance. Our results show the presence, conservation and expression profile of the UPS in this mollusk, providing a basis and new knowledge for other studies involving this system. Due to the importance of the UPS and B. glabrata, this work may influence the search for new methodologies for the control of schistosomiasis114CONSELHO NACIONAL DE DESENVOLVIMENTO CIENTÍFICO E TECNOLÓGICO - CNPQ479890/2013-

The Multidisciplinary Management Of Avulsed Teeth: A Case Report

This paper reports multidisciplinary treatment of a dental trauma case to achieve a favorable prognosis. A healthy 14-year-old girl reported avulsion of teeth 11 and 21 which had occurred three months earlier. The initial treatment consisting of replantation with a semi-rigid splint was performed in hospital. At presentation, the patient was still using the semi-rigid splint. The clinical examination revealed the presence of increased mobility in teeth 11 and 21, and absence of vitality in both. Radiographic examination showed the presence of inflammatory external root resorption in both teeth. The treatment proposed consisted of teeth extraction, a temporary prosthesis followed by adhesive prosthesis, and finally, implant surgery associated with porcelain crowns.74203206Koca, H., Topaloglu-Ak, A., Sutekin, E., Koca, O., Acar, S., Delayed replantation of an avulsed tooth after 5 hours of storage in saliva: A case report (2010) Dent Traumatol, 26 (4), pp. 370-373Lux, H.C., Goetz, F., Hellwig, E., Case report: Endodontic and surgical treatment of an upper central incisor with external root resorption and radicular cyst following a traumatic tooth avulsion (2010) Oral Surg Oral Med Oral Pathol Oral Radiol Endod, 110 (5), pp. e61-7Flores, M.T., Andersson, L., Andreasen, J.O., Bakland, L.K., Malmgren, B., Barnett, F., Guidelines for the management of traumatic dental injuries. II. Avulsion of permanent teeth (2007) Dent Traumatol, 23 (3), pp. 130-136Roskamp, L., Westphalen, V.P., Carneiro, E., Fariniuk, L.F., Silva, N.U.X., The positive influence of atopy on the prognosis of avulsed and replanted teeth despite differences in post- trauma management (2011) J Endod, 37 (4), pp. 463-465Andreasen, J.O., Andreasen, F., (2007) Textbook and Color Atlas of Traumatic Injuries to The Teeth, p. 912. , 4th Edition, Copenhagen: Denmark: MunksgaardMajorana, A., Bardellini, E., Conti, G., Keller, E., Pasini, S., Root resorption in dental trauma: 45 cases followed for 5 years (2003) Dent Traumatol, 19 (5), pp. 262-265Andreasen, J.O., Borum, M.K., Jacobsen, H.L., Andreasen, F.M., Replantation of 400 avulsed permanent incisors. 1. Diagnosis of healing complications (1995) Endod Dent Traumatol, 11 (2), pp. 51-58Soares, A.J., Gomes, B.P., Zaia, A.A., Ferraz, C.C., de Souza-Filho, F.J., Relationship between clinical-radiographic evaluation and outcome of teeth replantation (2008) Dent Traumatol, 24 (2), pp. 183-188Heithersay, G.S., Management of tooth resorption (2007) Aust Dent J, 52 (1 SUPPL.), pp. S105-S121Gold, S.I., Hasselgren, G., Peripheral inflammatory root resorption. A review of the literature with case reports (1992) J Clin Periodontol, 19 (8), pp. 523-534Emerich, K., Czerwinska, M., Ordyniec-Kwasnica, I., Immediate self-replantation of an avulsed permanent mandibular incisor - a case report (2010) Dent Traumatol, 26 (5), pp. 443-446Guzeler, I., Uysal, S., Cehreli, Z.C., Management of trauma-induced inflammatory root resorption using mineral trioxide aggregate obturation: Two-year follow up (2010) Dent Traumatol, 26 (6), pp. 501-504Drummond, S., Pessica, L.S., Monnerat, A.B., Monnerat, A.F., de Oliveira, A.M.A., Multidisciplinary solution for an avulsed upper central incisor: Case report (2011) Dent Traumatol, 27 (3), pp. 241-246Estevez, R., Aranguren, J., Escorial, A., de Gregorio, C., De La Torre, F., Vera, J., Invasive cervical resorption Class III in a maxillary central incisor: Diagnosis and follow-up by means of cone-beam computed tomography (2010) J Endod, 36 (12), pp. 2012-2014Vitale, M.C., Caprioglio, C., Martignone, A., Marchesi, U., Botticelli, A.R., Combined technique with polyethylene fibers and composite resins in restoration of traumatized anterior teeth (2004) Dent Traumatol, 20 (3), pp. 172-177Iseri, H., Solow, B., Growth displacement of the maxilla in girls studied by the implant method (1990) Eur J Orthod, 12 (4), pp. 389-398Odman, J., Grondahl, K., Lekholm, U., Thilander, B., The effect of osseointegrated implants on the dento-alveolar development. A clinical and radiographic study in growing pigs (1991) Eur J Orthod, 13 (4), pp. 279-286Graber, T.M., Vanarsdall, R., (2000) Orthodontics: Current Principles and Techniques, p. 1040. , 3th Edition. St Louis, Missouri: MosbyPolat, Z.S., Tacir, I.H., Restoring of traumatized anterior teeth: A case report (2008) Dent Traumatol, 24 (3), pp. e390-

Weakly-Bound Three-Body Systems with No Bound Subsystems

We investigate the domain of coupling constants which achieve binding for a 3-body system, while none of the 2-body subsystems is bound. We derive some general properties of the shape of the domain, and rigorous upper bounds on its size, using a Hall--Post decomposition of the Hamiltonian. Numerical illustrations are provided in the case of a Yukawa potential, using a simple variational method.Comment: gzipped ps with 11 figures included. To appear in Phys. Rev.

CVD diamond coated silicon nitride self-mated systems : tribological behaviour under high loads

Friction and wear behaviour of self-mated chemical vapour deposited (CVD) diamond films coating silicon nitride ceramics (Si3N4) were investigated in ambient atmosphere. The tribological tests were conducted in a reciprocal motion ball-on-flat type tribometer under applied normal loads up to 80 N (~10 GPa). Several characterisation techniques - including scanning electron microscopy (SEM), atomic force microscopy (AFM) and micro-Raman studies - were used in order to assess the quality, stress state and wear resistance of the coatings. In addition, a novel method is presented to estimate the wear coefficient of the diamond coated flat specimens from AFM and optical microscopy (OM) observations of the wear tracks

Jet size dependence of single jet suppression in lead-lead collisions at sqrt(s(NN)) = 2.76 TeV with the ATLAS detector at the LHC

Measurements of inclusive jet suppression in heavy ion collisions at the LHC provide direct sensitivity to the physics of jet quenching. In a sample of lead-lead collisions at sqrt(s) = 2.76 TeV corresponding to an integrated luminosity of approximately 7 inverse microbarns, ATLAS has measured jets with a calorimeter over the pseudorapidity interval |eta| < 2.1 and over the transverse momentum range 38 < pT < 210 GeV. Jets were reconstructed using the anti-kt algorithm with values for the distance parameter that determines the nominal jet radius of R = 0.2, 0.3, 0.4 and 0.5. The centrality dependence of the jet yield is characterized by the jet "central-to-peripheral ratio," Rcp. Jet production is found to be suppressed by approximately a factor of two in the 10% most central collisions relative to peripheral collisions. Rcp varies smoothly with centrality as characterized by the number of participating nucleons. The observed suppression is only weakly dependent on jet radius and transverse momentum. These results provide the first direct measurement of inclusive jet suppression in heavy ion collisions and complement previous measurements of dijet transverse energy imbalance at the LHC.Comment: 15 pages plus author list (30 pages total), 8 figures, 2 tables, submitted to Physics Letters B. All figures including auxiliary figures are available at http://atlas.web.cern.ch/Atlas/GROUPS/PHYSICS/PAPERS/HION-2011-02

Search for displaced vertices arising from decays of new heavy particles in 7 TeV pp collisions at ATLAS

We present the results of a search for new, heavy particles that decay at a significant distance from their production point into a final state containing charged hadrons in association with a high-momentum muon. The search is conducted in a pp-collision data sample with a center-of-mass energy of 7 TeV and an integrated luminosity of 33 pb^-1 collected in 2010 by the ATLAS detector operating at the Large Hadron Collider. Production of such particles is expected in various scenarios of physics beyond the standard model. We observe no signal and place limits on the production cross-section of supersymmetric particles in an R-parity-violating scenario as a function of the neutralino lifetime. Limits are presented for different squark and neutralino masses, enabling extension of the limits to a variety of other models.Comment: 8 pages plus author list (20 pages total), 8 figures, 1 table, final version to appear in Physics Letters

Measurement of the polarisation of W bosons produced with large transverse momentum in pp collisions at sqrt(s) = 7 TeV with the ATLAS experiment

This paper describes an analysis of the angular distribution of W->enu and W->munu decays, using data from pp collisions at sqrt(s) = 7 TeV recorded with the ATLAS detector at the LHC in 2010, corresponding to an integrated luminosity of about 35 pb^-1. Using the decay lepton transverse momentum and the missing transverse energy, the W decay angular distribution projected onto the transverse plane is obtained and analysed in terms of helicity fractions f0, fL and fR over two ranges of W transverse momentum (ptw): 35 < ptw < 50 GeV and ptw > 50 GeV. Good agreement is found with theoretical predictions. For ptw > 50 GeV, the values of f0 and fL-fR, averaged over charge and lepton flavour, are measured to be : f0 = 0.127 +/- 0.030 +/- 0.108 and fL-fR = 0.252 +/- 0.017 +/- 0.030, where the first uncertainties are statistical, and the second include all systematic effects.Comment: 19 pages plus author list (34 pages total), 9 figures, 11 tables, revised author list, matches European Journal of Physics C versio