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101.
Caroline Berwanger Cord Rafael Vidal Cortez Velasco Laíla Fernanda Ribeiro Melo Lima Daniel Guimarães Pedro Rocha Carlos Eduardo da Silveira Bueno Sérgio Luiz Pinheiro 《Journal of endodontics》2014
Introduction
The aim of this study was to evaluate the effectiveness of peracetic acid (PAA) in cleaning root canals contaminated with Enterococcus faecalis.Methods
Sixty first and second mandibular molars were used. Their mesiobuccal canals were prepared with the Reciproc System (VDW, Munich, Germany). The canals were irrigated with 10 mL saline during instrumentation. The teeth were randomly divided into 3 groups (n = 20), according to the irrigation solution to be used after instrumentation: group PAA (5 mL 1% PAA), group EDTA/sodium hypochlorite (NaOCl) (5 mL 17% EDTA followed by 5 mL 2.5% sodium hypochlorite), and group S (5 mL saline). Microbiological samples were collected before instrumentation and after final irrigation. Bacterial quantification was performed by counting the number of colony-forming units (CFUs/mL). The results were analyzed by the nonparametric Wilcoxon and Kruskal-Wallis tests.Results
The 3 groups showed a significant reduction (P < .05) in CFUs/mL after final irrigation. PAA and NaOCl associated with EDTA produced a significantly higher reduction in CFUs/mL (P < .05) compared with saline. There was no statistically significant difference between PAA and EDTA + 2.5% NaOCl (P > .05).Conclusions
According to the results of the present study, the effectiveness of 1% PAA was similar to that of 17% EDTA + 2.5% NaOCl in cleaning curved root canals contaminated with E. faecalis. 相似文献102.
103.
Volkmar v. Arnim Heino Finkelmann Alicia Dobarro Dolores Velasco 《Macromolecular chemistry and physics.》1996,197(9):2729-2743
A series of chiral mesogenic side chain polymers containing a carbazole unit have been synthesized and investigated with regard to their liquid crystal (1c) phase behaviour. The carbazole units are linked either via the 2-position with a 1-oxycarbonyl-4-alkoxylphenyl moiety (end-on) or via the 9-position with an alkyl chain (side-on) to polymethylsiloxane. Only end-on polymers with long spacers or a ratio bigger one of spacer length and the free lateral alkyl chain length exhibit stable or metastable smectic phases. The side-on polymers are only isotropic or crystalline. 相似文献
104.
Alba Ruedas-Lpez Isaac Alonso-García Cristina Lasarte-Monterrubio Paula Guijarro-Snchez Eva Gato Juan Carlos Vzquez-Ucha Juan Andrs Vallejo Pablo Arturo Fraile-Ribot Begoa Fernndez-Prez David Velasco Jos María Gutirrez-Urbn Marina Oviao Alejandro Beceiro Concepcin Gonzlez-Bello Antonio Oliver Jorge Arca-Surez Germn Bou 《Antimicrobial agents and chemotherapy》2022,66(2)
105.
Graphene-related materials (GRMs) such as graphene quantum dots (GQDs), graphene oxide (GO), reduced graphene oxide (rGO), graphene nanoribbons (GNRs), and so forth have recently emerged as photovoltaic (PV) materials due to their nanodimensional structure and outstanding properties such as high electrical and thermal conductivity, large specific surface, and unique combination of mechanical strength and flexibility. They can be a crucial part of transparent electrodes, hole/electron transport materials, and active layers in organic solar cells (OSCs). Besides their role in charge extraction and transport, GRMs act as device protectors against environmental degradation through their compact bidimensional structure and offer good durability. This review briefly presents the synthesis methods of GRMs and describes the current progress in GRM-based OSCs. PV parameters (short circuit current, open circuit voltage, power conversion efficiency, and fill factor) are summarized and comparatively discussed for the different structures. The efficiency recently surpassed 15% for an OSC incorporating polymer-modified graphene as a transparent electrode. The long-term stability of OSCs incorporating GRMs is also discussed. Finally, conclusions and the outlook for future investigation into GRM-based devices for PVs are presented. 相似文献
106.
107.
Thaís Caroline Dallabona Dombroski Jose Eduardo Peixoto-Santos Karina Maciel Munira Muhammad Abdel Baqui Tonicarlo Rodrigues Velasco Americo Ceiki Sakamoto João Alberto Assirati Carlos Gilberto Carlotti Hélio Rubens Machado Gleice Kelly de Sousa Kenji Hanamura João Pereira Leite Jaderson Costa da Costa André Luiz Palmini Eliseu Paglioli Luciano Neder Roberto Spreafico Tomoaki Shirao Rita Garbelli Antonio Roberto Martins 《Epilepsia》2020,61(8):1581-1594
108.
Camilo Jaimes Fedel Machado‐Rivas Onur Afacan Shadab Khan Bahram Marami Cynthia M. Ortinau Caitlin K. Rollins Clemente Velasco‐Annis Simon K. Warfield Ali Gholipour 《Human brain mapping》2020,41(12):3177-3185
The third trimester of pregnancy is a period of rapid development of fiber bundles in the fetal white matter. Using a recently developed motion‐tracked slice‐to‐volume registration (MT‐SVR) method, we aimed to quantify tract‐specific developmental changes in apparent diffusion coefficient (ADC), fractional anisotropy (FA), and volume in third trimester healthy fetuses. To this end, we reconstructed diffusion tensor images from motion corrected fetal diffusion magnetic resonance imaging data. With an approved protocol, fetal MRI exams were performed on healthy pregnant women at 3 Tesla and included multiple (2–8) diffusion scans of the fetal head (1–2 b = 0 s/mm2 images and 12 diffusion‐sensitized images at b = 500 s/mm2). Diffusion data from 32 fetuses (13 females) with median gestational age (GA) of 33 weeks 4 days were processed with MT‐SVR and deterministic tractography seeded by regions of interest corresponding to 12 major fiber tracts. Multivariable regression analysis was used to evaluate the association of GA with volume, FA, and ADC for each tract. For all tracts, the volume and FA increased, and the ADC decreased with GA. Associations reached statistical significance for: FA and ADC of the forceps major; volume and ADC for the forceps minor; FA, ADC, and volume for the cingulum; ADC, FA, and volume for the uncinate fasciculi; ADC of the inferior fronto‐occipital fasciculi, ADC of the inferior longitudinal fasciculi; and FA and ADC for the corticospinal tracts. These quantitative results demonstrate the complex pattern and rates of tract‐specific, GA‐related microstructural changes of the developing white matter in human fetal brain. 相似文献
109.
110.
Cristina Vico‐Alonso Alba Calleja‐Algarra Raquel Aragn‐Miguel Alba Snchez‐Velzquez Virginia Velasco‐Tamariz Pablo Luis Ortiz‐Romero Vernica Monslvez‐Honrubia 《Dermatologic therapy》2019,32(2)
Bullous pemphigoid (BP) is an acquired autoimmune bullous disease characterized by autoantibodies against the hemidesmosomal proteins found in the basal keratinocytes of the basement membrane zone (BMZ): a 180 kDa protein (type XVII collagen) mainly and the 230 kDa antigen. There is such evidence that the antibodies against the BMZ components are not only of IgG type, but also this bullous disease may have IgE antibodies directed to the BMZ that contribute to the pathogenesis of the disorder. IgE is not only thought to contribute to the pathogenesis of BP, it has also been suggested that eosinophils play a role in the development of the first signs associated with BP. A humanized monoclonal antibody directed to IgE, omalizumab, is approved for the treatment of severe asthma and chronic spontaneous urticaria, and it may be useful in the treatment of BP in the first stages of the disease. 相似文献