检索结果-南通市图书馆

Quantitative scintigraphic analysis of the apical seal in Thermafil/Topseal and Real Seal 1/Realseal filled root canals

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

World Journal of Stomatology 2013年第2期2卷 30-34页

作者： Manuel Marques Ferreira Margarida Abrantes Eunice Virgínia Carrilho maria filomena botelho Department of Dentistry Faculty of Medicine University of Coimbra3000 Coimbra Portugal Department of Biophysics and Biomathematics IBILI-Faculty of Medicine University of Coimbra 3000 Coimbra Portugal

AIM: To investigate the microleakage of two different root canal obturation systems, using the nuclear medicine ***: Twenty-six single-rooted extracted teeth were selected. The crowns were sectioned to obtain 15-mm long root segments and each tooth was prepared using rotary Pro File instruments. The roots were divided into 2 experimental groups using Real Seal 1 and Real Seal sealer or Thermafil and Top Seal sealer as well as two control groups. On the 7th and the 28 th day the apices were submersed in a solution of 99 m TcPertechnetate during 3 h. The radioactivity was counted using a γ camera. RESULTS: The present study showed that none of the root canal-filled teeth was leakage free. The statistical analyses were made using Kruskal-Wallis and statistical significance was assessed using α = 0.05. Although apical leakage measured in counts per minute(cpm) in the Thermafil/Top Seal group was lower than in the Real Seal/Real Seal group(363 916 ± 180 707.7 cpm vs533 427 ± 414 020.6 cpm) on 7th day and(1 678 200 ± 567 217.4 cpm vs 2 240 518 ± 383 356.7 cpm) on 28 th day, there was no statistical difference(P > 0.05). In the Thermafil/Top Seal group and Real Seal 1/Real Seal group it was found that over time, the number of counts increased between 7 d and 28 d(363 916 ± 180 707.7 cpm vs 1 678 200 ± 567 217.4 cpm) and(533 427 ± 414 020.6 cpm vs 2 240 518 ± 383 356.7 cpm), respectively, with statistically significant differences(Thermafil/Top Seal group, P = 0.015 and Real Seal 1/Real Seal group, P = 0.036).CONCLUSION:Both carrier-based Realseal 1 and Thermafil techniques showed a similar sealing effect,but none of the materials was leakage free.

关键词： Microleakage Nuclear medicine Obturation Thermafil Realseal

Comparison of the apical seal on filled root canals with Topseal<sup>®</sup>vs MTA Fillapex<sup>®</sup>sealers: A quantitative scintigraphic analysis

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Open Journal of Stomatology 2013年第2期3卷 128-132页

作者： Manuel Marques Ferreira Margarida Abrantes Hugo Ferreira Eunice Virgínia Carrilho maria filomena botelho Department of Biophysics and Biomathematics IBILI-Faculty of Medicine University of Coimbra Coimbra Portugal Department of Dentistry Faculty of Medicine University of Coimbra Coimbra Portugal

This study investigated the microleakage of two different root canal obturation systems, using the nuclear medicine approach, with sodium pertechnetate 99mTc. Twenty six single-rooted extracted teeth were selected. The crowns were sectioned to obtain15 mmlong root segments and each tooth was prepared using rotary ProFile? instruments. The roots were divided into 2 experimental groups and two control groups. Twenty root canals were filled, using Thermafil? and Topseal? or MTA Fillapex? as a sealer. On the 7th and the 28th day the apices were submersed in a solution of 99mTc-Pertechnetate during 3 hours. The radioactivity was counted using a gamma camera. Although apical leakage on the 7th day in the Topseal group was reduced compared with RealSeal1, with a statistical significant difference (p = 0.057), on the 28th day, the MTA Fillapex increased the sealing properties (p = 0.017).

关键词： Microleakage Nuclear Medicine Obturation Thermafil Topseal MTA Fillapex

Efflux Pumps Modulation in Colorectal Adenocarcinoma Cell Lines: The Role of Nuclear Medicine

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Journal of Cancer Therapy 2011年第3期2卷 408-417页

作者： Joao Casalta-Lopes Ana Margarida Abrantes Mafalda Laranjo Joana Rio Ana Cristina Goncalves Barbara Oliveiros Ana Bela Sarmento-Ribeiro maria filomena botelho Biophysics Unit IBILIFaculty of MedicineUniversity of CoimbraCoimbraPortugal Centre of Investigation on Cancer Envi-ronmentGenetics and OncobiologyFaculty of MedicineUniversity of CoimbraCoimbraPortugal Institute of Nuclear Sciences Applied to Health University of CoimbraCoimbraPortugal Applied Molecular Biology Unit Faculty of MedicineUniversity of CoimbraCoimbraPortugal.

Introduction: Multidrug resistance (MDR) is one of the major problems of chemotherapy. Overexpression of efflux pumps, such as P-glycoprotein (Pgp), multiple resistance-related protein 1 (MRP-1) and lung resistance protein (LRP) can lead to MDR. Verapamil and L-buthionine-sulfoximine (BSO) are two modulators of these proteins. This study aims to compare 99mTc-Sestamibi transport kinetics in human colorectal adenocarcinoma cell lines, in the presence and absence of the MDR modulators verapamil and BSO. Material and Methods: MDR proteins expression was evaluated in sensitive (WiDr) and resistant (LS1034) human colorectal adenocarcinoma cell lines. Intracellular and plasma membrane Pgp and MRP1, and LRP expression was analyzed by flow-cytometry and western blot. Cellular transport kinetics was assessed using 99mTc-Sestamibi. MDR modulation was evaluated though retention studies in resistant cells after incubation with the modulators. Results: Pgp expression was significantly higher (p≤0.001) in resistant cells. These results were confirmed by western blot analysis. 99mTc-Sestamibi uptake and retention percentage were significantly higher (p99mTc-Sestamibi, there were differences among the MDR modulators used (p99mTc-Sestamibi could indicate MDR phenotype in colorectal adenocarcinoma cells. As the modulators used showed a reversion of the retention profile only for the first minutes, their administration should occur immediately before the administration of cytotoxic drugs.

关键词： Multidrug Resistance P-Glycoprotein Multidrug Resistance-Associated Protein 1 Major Vault Protein

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

氯己定漱口液作为防龋剂的系统评价

中国口腔医学继续教育杂志 2018年第3期21卷 140-145页

作者： Ana Sofia Estima Cunha Coelho Teresa maria Palmeirao Carrilho maria filomena Rabaca Roque botelho 马张珂(译) 张珊珊(审) 郑树国(审) 不详北京大学口腔医学院·口腔医院预防保健科北京市海淀区中关村南大街22号100081

目的：评价在中高危息龋风险患者中使用氯己定漱口液中减少致龋菌的有效性。材料与方法：利用Cochrane Library、Embase、PubMed、Scopus和Web of Science完成文献系统评价。检索截止到2017年1月发表的英语、西班牙语和葡萄牙语文章。根... 详细信息

目的：评价在中高危息龋风险患者中使用氯己定漱口液中减少致龋菌的有效性。材料与方法：利用Cochrane Library、Embase、PubMed、Scopus和Web of Science完成文献系统评价。检索截止到2017年1月发表的英语、西班牙语和葡萄牙语文章。根据PICO策略设计检索问题。利用Cochrane干预系统评价手册的指南做偏倚风险评估。结论：所有作者都发现了在使用氯己定漱口液过程中及之后，变异链球菌水平有统计上的显著差异。尽管这些结果有启发性,但是仍有必要开展新的高质量长随访周期的研究以评估这些结果能否转化用于减缓龋齿的发展，从而评估这些产品是否应纳入防龋方案。

关键词：文献系统评价漱口液氯己定防龋剂 Cochrane 风险评估 PubMed 变异链球菌

Risk stratification of HCC occurrence after HCV eradication:a complicate plot of risk factors related and unrelated to the previous viral disease

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Hepatobiliary Surgery and Nutrition 2020年第4期9卷 511-513页

作者： Valentina Cossiga maria Guarino filomena Morisco Nicola Caporaso Gastroenterology Unit Department of Clinical Medicine and SurgeryUniversity of Naples“Federico II”NaplesItaly

Hepatocellular carcinoma(HCC)is the fifth most common cancer and the second most frequent cause of cancer-related death *** C virus(HCV)infection is one of leading cause of cirrhosis,that is the strongest risk factor ... 详细信息

关键词： cancer death cirrhosis

Oxypropylation of Brazilian Pine-Fruit Shell Evaluated by Principal Component Analysis

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Journal of Renewable Materials 2018年第7期6卷 715-723页

作者： Stephany Cde Rezende João APinto Isabel PFernandes Fernanda VLeimann maria-filomena Barreiro Laboratory of Separation and Reaction Engineering-Laboratory of Catalysis and Materials(LSRE-LCM) Polytechnic Institute of BragançaBragançaPortugal Programa de Pós-Graduação em Tecnologia de Alimentos(PPGTA) Universidade Tecnológica Federal do Paraná-UTFPR Campus Campo MourãoVia Rosalina Maria Dos Santos1233.CEP 87301-899.Caixa Postal:271Campo Mourão-PR-Brasil Mountain Research Centre(CIMO) Polytechnic Institute of BragançaBragançaPortugal

Pine-fruit shell (PFS) is a lignocellulosic residue derived from the fruit of Araucaria angustifolia, a coniferoustree native of South America, part of a whole vegetation of the Atlantic Forest, found in the South and Southwestof Brazil. In this work PFS will be characterized and used in the production of PFS-based polyols throughoxypropylation. Three series were chosen (PFS/propylene oxide (PO) (w/v, g/mL) of 30/70, 20/80 and 10/90)with four catalyst levels (5%, 10%, 15% and 20%, (w/w, PFS based)). Oxypropylation occurred at moderateconditions of temperature, pressure and time giving rise to liquid polyols with a homopolymer content (PPO)ranging from 4-65%, a hydroxyl number (IOH) between 257-605 mg KOH/g and viscosities (V) varying from0.76 Pa.s to 373.90 Pa.s (20°C) for the series 20/80 and 10/90, while for the series 30/70, the viscosity reachedvalues higher than 500 Pa.s, 20°C. The unreacted PFS (UR) varied between 3.6% and 77.4% (PFS-basis). Afterthe PFS-based polyols production and characterization, a principal component analysis (PCA) was performed inorder to evaluate the established interactions between the used formulation variables and the obtained polyolproperties. The PCA analysis allowed to clarify the interactions between PFS and PO contents and the finalbiopolyol properties (PPO, IOH, V and UR). This approach showed to be a simple method to rationally analyzethe influence of the input formulation variables on the final polyol properties.

关键词： Principal components analysis Brazilian pine-fruit shell (PFS) oxypropylation polyols

Direct-acting antivirals and hepatocellular carcinoma in chronic hepatitis C: A few lights and many shadows

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

World Journal of Gastroenterology 2018年第24期24卷 2582-2595页

作者： maria Guarino Anna Sessa Valentina Cossiga Federica Morando Nicola Caporaso filomena Morisco Gastroenterology Unit Department of Clinical Medicine and SurgeryUniversity of Naples Federico Ⅱ

With the introduction of direct-acting antiviral agents(DAA), the rate of sustained virological response(SVR) in the treatment of hepatitis C virus(HCV) has radically improved to over 95%. Robust scientific evidence supports a beneficial role of SVR after interferon therapy in the progression of cirrhosis, resulting in a decreased incidence of hepatocellular carcinoma(HCC). However, a debate on the impact of DAAs on the development of HCC is ongoing. This review aimed to analyse the scientific literature regarding the risk of HCC in terms of its recurrence and occurrence after the use of DAAs to eradicate HCV infection. Among 11 studies examining HCC occurrence, the de novo incidence rate ranged from 0 to 7.4%(maximum follow-up: 18 mo). Among 18 studies regarding HCC recurrence, the rate ranged from 0 to 54.4%(maximum "not well-defined" followup: 32 mo). This review highlights the major difficulties in interpreting data and reconciling the results of the included studies. These difficulties include heterogeneous cohorts, potential misclassifications of HCC prior to DAA therapy, the absence of an adequate control group, short follow-up times and different kinds of follow-up. Moreover, no clinical feature-based scoring system accounts for the molecular characteristics and pathobiology of the tumours. Nonetheless, this review does not suggest that there is a higher rate of de novo HCC occurrence or recurrence after DAA therapy in patients with previous HCV infection.

关键词： hepatocellular carcinoma hepatitis C virus direct-acting antiviral agents occurrence recurrence

Analysis of genetic relationship among Arbutus unedo L. genotypes using RAPD and SSR markers

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Journal of Forestry Research 2013年第2期24卷 227-236页

作者： filomena Gomes Rita Costa maria M. Ribeiro Elisa Figueiredo Jorge M. Canhoto CERNAS Departamento Florestal Escola Superior Agrária Coimbra INRB Instituto Nacional de Recursos Biológicos Departamento de Recursos Naturais e Desenvolvimento Sustentável Escola Superior Agrária Centre of Functional Ecology Department of Life Sciences University of Coimbra

The strawberry tree （Arbutus unedo L.） is an underutilized, drought tolerant, fire resistant species with a south western distribution in Europe, and with ecological and putative socio-economical impact in Portugal and Mediterranean countries. Our aim was to develop an appropriate set of molecular markers to enable genetic diversity to be assessed and to fingerprint Arbutus unedo genotypes for breeding and conservation purposes in Portugal. Twenty-seven trees from a broad geographic range were screened with 20 random amplified polymorphic DNA （RAPD primers） and 11 microsatellite markers （SSR）. The RAPDs generated 124 bands, 57.3% of which were polymorphic, with an expected heterozygosity of 27%. We cross-amplified 11 SSR primers developed for Vaccinium spp., and 5 were found to be polymorphic in A. unedo, with 75% of expected heterozygosity, a number of alleles of 11.6, a null allele frequency of 7.6% and a polymorphic information content of 71%. Although the SSRs were more polymorphic and informative than the RAPDs, both markers displayed high genetic variability with the gathered data. No geographic pattern was observed in the genetic variation distribution based on both marker systems, and the lack of correlation between genetic and geographical matrices was confirmed by Mantel tests. Likely, no correlation was found between pairwise SSR and RAPD band-sharing matrices. These results and their implications on A. unedo breeding and conservation programs are discussed.

关键词： Ericaceae fingerprinting geographic pattern molecular markers strawberry tree.

Hepatitis B and C virus reactivation in immunosuppressed patients with inflammatory bowel disease

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

World Journal of Gastroenterology 2014年第13期20卷 3516-3524页

作者： Stefano Sansone maria Guarino Fabiana Castiglione Antonio Rispo Francesco Auriemma Ilaria Loperto Matilde Rea Nicola Caporaso filomena Morisco Gastroenterology Unit Department of Clinical Medicine and SurgeryUniversity of Naples "Federico II"80131 NaplesItaly

In recent years,a number of case reports and clinical studies have highlighted the risk of hepatitis B and C virus reactivation in patients with inflammatory bowel disease who are treated with immunosuppressive *** cases of viral hepatitis reactivation that have been reported are characterized by a wide range of clinical manifestations,from viremia without clinically relevant manifestations to fulminant life-threatening *** development and dissemination of biological immunosuppressive drugs have led to a significant increase in the number of reports of interest to physicians in a variety of clinical *** this topic,there have been a number of published guidelines and reviews that have collected the available evidence,providing recommendations on prophylactic and therapeutic strategies and methods for monitoring patients at ***,it should be noted that,to date,very few clinical studies have been published,and most of the recommendations have been borrowed from otherclinical *** published studies are mostly retrospective and are based on very heterogeneous populations,using different therapeutic and prophylactic regimens and obtaining conflicting ***,it seems clear that it is desirable to concentrate our efforts on prospective studies,not conducting further reviews of the literature in the continued absence of new evidence.

关键词： Inflammatory bowel disease Biological agents Hepatitis B virus reactivation Hepatitis C virus reactivation Prophylaxis