998 resultados para 242-1


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Objective: The aims of this study were to establish the structure of the potent anticonvulsant enaminone methyl 4-(4′-bromophenyl)amino-6-methyl-2- oxocyclohex-3-en-1-oate (E139), and to determine the energetically preferred conformation of the molecule, which is responsible for the biological activity. Materials and Methods: The structure of the molecule was determined by X-ray crystallography. Theoretical ab initio calculations with different basis sets were used to compare the energies of the different enantiomers and to other structurally related compounds. Results: The X-ray crystal structure revealed two independent molecules of E139, both with absolute configuration C11(S), C12(R), and their inverse. Ab initio calculations with the 6-31G, 3-21G and STO-3G basis sets confirmed that the C11(S), C12(R) enantiomer with both substituents equatorial had the lowest energy. Compared to relevant crystal structures, the geometry of the theoretical structures shows a longer C-N and shorter C=O distance with more cyclohexene ring puckering in the isolated molecule. Conclusion: Based on a pharmacophoric model it is suggested that the enaminone system HN-C=C-C=O and the 4-bromophenyl group in E139 are necessary to confer anticonvulsant property that could lead to the design of new and improved anticonvulsant agents. Copyright © 2003 S. Karger AG, Basel.

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Im Jahre 1891 wurde der Gletschermeßdienst des Alpenvereins begonnen, er besteht nun ohne Unterbrechung das 90. Jahr. Da das damals entworfene Konzept für den Meßdienst im wesentlichen beibehalten wurde, ist sowohl von der Methodik als auch für einzelne Gletscher eine wissenschaftlich wertvolle Kontinuität der Beobachtung gegeben, die auch weiterhin aufrecht erhalten werden soll. Im Berichtsjahr haben die 14 ehrenamtlichen Mitarbeiter im Auftrage des Österreichischen Alpenvereins 16 Gebietsberichte mit insgesamt 155 Seiten und 242 Fotos eingesandt, aus denen der vorliegende Bericht zusammengestellt wurde. Die Originalberichte werden im Gletschermeßarchiv des ÖAV aufbewahrt.

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Rezension von: Fritz-Peter Hager/Daniel Tröhler (Hrsg.): Neue Pestalozzi-Studien. Bd. 1: Anna Pestalozzis Tagebuch - Käte Silber: Anna Pestalozzi und der Frauenkreis um Pestalozzi. Bern/Stuttgart: Haupt 1993, 242 S.

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Este artigo é o resultado de uma pesquisa exaustiva que tenho desenvolvido em torno do Manuscrito 242 da Biblioteca da Universidade de Coimbra (P-Cug MM 242). Este valioso manuscrito do século XVI destaca-se pela importância crucial para o estudo da música instrumental em Portugal, no Renascimento tardio e nas primeiras décadas do século XVII. Neste manuscrito estão reproduzidos alguns dos primeiros exemplos de tento e fantasia, como o atestam as obras para tecla de António Carrreira (c.1530c. 1594). Para além de um grande número de cópias de motetes, andamentos de Missa, canções e madrigais escritos por diversos compositores europeus de meados do século XVI, identificados e inventariados por Owen Rees, este manuscrito inclui também diversas peças instrumentais de autoria desconhecida, que ainda não receberam a atenção que merecem. Deste conjunto, seleccionei dois grupos de obras que reúnem pequenas peças instrumentais, as quais irei aprofundar neste artigo. O primeiro grupo, que representa o objecto central deste estudo, é constituído por um conjunto de obras para tecla com melodias em cantochão que proponho incluir nos géneros verso e/ou fabordão para órgão. Pretendo discutir estas obras a partir das suas características formais, estilísticas e performativas, assim como a sua inclusão nas práticas de alternatim instrumental no Mosteiro de Santa Cruz de Coimbra durante esse período.

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Este artigo é o resultado de uma pesquisa exaustiva que tenho desenvolvido em torno do Manuscrito 242 da Biblioteca da Universidade de Coimbra (P-Cug MM 242). Este valioso manuscrito do século XVIdestaca-se pela importância crucial para o estudo da música instrumental em Portugal, no Renascimento tardio e nas primeiras décadas do século XVII. Neste manuscrito estão reproduzidos alguns dosprimeiros exemplos de tento e fantasia, como o atestam as obras para tecla de António Carrreira (c.1530c. 1594). Para além de um grande número de cópias de motetes, andamentos de Missa, canções emadrigais escritos por diversos compositores europeus de meados do século XVI, identificados einventariados por Owen Rees, este manuscrito inclui também diversas peças instrumentais de autoriadesconhecida, que ainda não receberam a atenção que merecem. Deste conjunto, seleccionei dois grupos de obras que reúnem pequenas peças instrumentais, as quais irei aprofundar neste artigo. O primeirogrupo, que representa o objecto central deste estudo, é constituído por um conjunto de obras para teclacom melodias em cantochão que proponho incluir nos géneros verso e/ou fabordão para órgão. Pretendodiscutir estas obras a partir das suas características formais, estilísticas e performativas, assim como a suainclusão nas práticas de alternatim instrumental no Mosteiro de Santa Cruz de Coimbra durante esse período.

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This study aimed at evaluating the functional activation and activating receptors expression on resting, short- and long-term NK and NK-like T cells from blood of ovarian neoplasia patients. Blood from patients with adnexal benign alterations (n = 10) and ovarian cancer (grade I-IV n = 14) were collected after signed consent. Effector cells activation was evaluated by the expression of the CD107a molecule. Short-term culture was conducted overnight with IL-2 and long-term culture for 21 days, by a method designed to expand CD56(+) lymphocytes. Short-term culture significantly increased NK cells activation compared to resting NK cells (p<0.05), however, the long-term procedure supported an even higher increase (p<0.001). Resting NK-like T cells showed poor activation, which was not altered by the culture procedures. The long-term culture effectively increased the expression of the activating receptors on NK and NK-like T cells, either by increasing the number of cells expressing a given receptor and/or by up-regulating their expression intensity. As a conclusion, the long-term culture system employed, resulted in a high number of functional NK cells. The culture system was particularly efficient on the up-regulation of NKp30 and DNAM-1 receptors on NK cells.

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Human bocavirus 1 (HBoV1) is associated with respiratory infections worldwide, mainly in children. Similar to other parvoviruses, it is believed that HBoV1 can persist for long periods of time in humans, probably through maintaining concatemers of the virus single-stranded DNA genome in the nuclei of infected cells. Recently, HBoV-1 was detected in high rates in adenoid and palatine tonsils samples from patients with chronic adenotonsillar diseases, but nothing is known about the virus replication levels in those tissues. A 3-year prospective hospital-based study was conducted to detect and quantify HBoV1 DNA and mRNAs in samples of the adenoids (AD), palatine tonsils (PT), nasopharyngeal secretions (NPS), and peripheral blood (PB) from patients undergoing tonsillectomy for tonsillar hypertrophy or recurrent tonsillitis. HBoV1 was detected in 25.3% of the AD samples, while the rates of detection in the PT, NPS, and PB samples were 7.2%, 10.5%, and 1.7%, respectively. The viral loads were higher in AD samples, and 27.3% of the patients with HBoV had mRNA detectable in this tissue. High viral loads and detectable mRNA in the AD were associated with HBoV1 detection in the other sample sites. The adenoids are an important site of HBoV1 replication and persistence in children with tonsillar hypertrophy. The adenoids contain high HBoV1 loads and are frequently positive for HBoV mRNA, and this is associated with the detection of HBoV1 in secretions.

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This study aimed to identify novel biomarkers for thyroid carcinoma diagnosis and prognosis. We have constructed a human single-chain variable fragment (scFv) antibody library that was selected against tumour thyroid cells using the BRASIL method (biopanning and rapid analysis of selective interactive ligands) and phage display technology. One highly reactive clone, scFv-C1, with specific binding to papillary thyroid tumour proteins was confirmed by ELISA, which was further tested against a tissue microarray that comprised of 229 thyroid tissues, including: 110 carcinomas (38 papillary thyroid carcinomas (PTCs), 42 follicular carcinomas, 30 follicular variants of PTC), 18 normal thyroid tissues, 49 nodular goitres (NG) and 52 follicular adenomas. The scFv-C1 was able to distinguish carcinomas from benign lesions (P=0.0001) and reacted preferentially against T1 and T2 tumour stages (P=0.0108). We have further identified an OTU domain-containing protein 1, DUBA-7 deubiquitinating enzyme as the scFv-binding antigen using two-dimensional polyacrylamide gel electrophoresis and mass spectrometry. The strategy of screening and identifying a cell-surface-binding antibody against thyroid tissues was highly effective and resulted in a useful biomarker that recognises malignancy among thyroid nodules and may help identify lower-risk cases that can benefit from less-aggressive management.