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Search Results: 1 - 10 of 155252 matches for " Regina B. Ching "
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Uso del bajo peso al nacer como criterio seleccionador para la vigilancia rutinaria de anomalías congénitas de origen infeccioso
Bermúdez,Antonio José; González,Nohora E.; Ching,Regina B.;
Colombia Médica , 2008,
Abstract: introduction: surveillance of congenital anomalies receives importance in the world-wide context of eradicating the congenital rubella syndrome. objective: to identify the congenital anomalies and to consider the low birth weight a criterion to test igm for the complex torch. methodology: surveillance of the congenital specific and non specific anomalies of the congenital rubella syndrome(crs) and low birth weight in ten hospitals. it was considered as case, everything new born with some congenital anomaly or low weight for the gestational age. serum tests for rubella, toxoplasmosis, citomegalovirus, herpes and parvovirus were practiced. for the negative cases cariotype was performed. results: a total of 840 cases were selected, 669 by low weight for the gestational age, 52 by anomalies not related to crs, 52; by anomalies that could be related to the crs, 105. the most frequent anomalies were congenital heart diseases, 5.1%; hepatosplenomegalies, 3.9%; and microcephalies, 1.2%. there were confirmatory igm titles for rubella in 0.5% of cases; toxoplasmosis 1.4%; citomegalovirus 1.5%; parvovirus 1.2%; herpes 0.5%; and positive test for congenital syphilis, 3.7%. in total there were 8.8% positive results for any congenital infectious disease. the relative risk for low birth weight having igm positive rubella was rr = 2.83 (ic: 1.26:6.36-0.95). discussion and conclusions: the surveillance for crs, through the monitoring of febrile in the first year and by the presence of some specific congenital anomalies, could be improved in sensitivity by means of the routine monitoring of congenital anomalies, with the inclusion of low birth weight, like a selecting criterion to study the infectious agents.
Uso del bajo peso al nacer como criterio seleccionador para la vigilancia rutinaria de anomalías congénitas de origen infeccioso
Antonio José Bermúdez,Nohora E. González,Regina B. Ching
Colombia Médica , 2008,
Abstract: Introducción: La vigilancia de las anomalías congénitas cobra importancia en el contexto mundial de erradicar el síndrome de rubéola congénita. Objetivo: Identificar las anomalías congénitas y considerar el bajo peso como criterios para hacer pruebas rutinarias de IgM para el complejo TORCH. Metodología: Vigilancia de las anomalías congénitas, específicas y no específicas del síndrome de rubéola congénita (SRC) y bajo peso al nacer en diez centros hospitalarios. Se consideró como caso, todo recién nacido con alguna anomalía congénita o con bajo peso para la edad gestacional. Se practicaron pruebas en suero para rubéola, toxoplasmosis, citome-galovirus, herpes y parvovirus. Para los casos negativos se practicó cariotipo. Resultados: Se captaron 840 casos, 669 por peso bajo para la edad gestacional, 52 por anomalía no relacionada con SRC, 105 por anomalías que se podrían relacionar con el SRC. Las más frecuentes fueron cardiopatías, 5.1%; hepatoesplenomegalias, 3.9%; y microcefalias, 1.2%. Para sífilis congénita la tasa de positividad fue 3.7%; rubéola, 0.5%; toxoplasmosis, 1.4%; citomegalovirus, 1.5%; parvovirus, 1.2%; y herpes, 0.5%. El riesgo relativo para bajo peso con IgM rubéola positivo fue RR = 2.83 (IC: 1.26:6.36-0.95). Discusión y conclusiones: La vigilancia del SRC se hizo sobre todo por medio de la vigilancia de febriles en el primer a o y por la presencia de algunas anomalías congénitas. La sensibilidad se mejoró por medio de la vigilancia rutinaria de anomalías congénitas, con la inclusión de bajo peso al nacer, como criterio seleccionador para estudiar los agentes infecciosos.
Pertenencias inseguras: Una familia de origen alemán de la ex Unión Soviética en Alemania Unsichere Zugeh rigkeiten: Lebens- und Familiengeschichte von drei Frauen einer ethnisch deutschen Familie aus der ehemaligen Sowjetunion Insecure Belongings: A Family of Ethnic Germans from the Former Soviet Union in Germany
Jana Ballenthien,Corinne Büching
Forum : Qualitative Social Research , 2009,
Abstract: Este artículo analiza la transformación de las construcciones de pertenencia en el curso de la vida, y la forma en que se insertan en la familia y la historia colectiva. Basado en un estudio de caso de tres mujeres que pertenecen a una familia que, como alemanes, migraron a principios de los 90 de la Unión Soviética a Alemania, hemos sido capaces de demostrar cómo las cuestiones de pertenencia se iniciaron con el proceso de migración y con los atributos adscritos a ellas en su país de llegada. Varios miembros de la familia fueron vistos para realizar diferentes estrategias de trabajo biográfico. Esto se debió a su experiencia autobiográfica única y su pertenencia a diferentes generaciones históricas. Por lo tanto, la experiencia de la abuela sobre la deportación de la República del Volga a Siberia durante la Segunda Guerra Mundial, se reactivó durante su emigración a Alemania. Esto reconfirmó su construcción de la pertenencia como una alemana del Volga. Mientras, tras la migración, su nuera conceptualiza su pertenencia como una cuestión de membresía a un grupo-nosotros religioso. Su nieta, no obstante, antes y después de la emigración, buscó con éxito una conexión del sentido de pertenencia a su familia de origen y a sus grupos de pares, primero en la sociedad soviética, que fue influenciada por la cultura rusa predominante y, más tarde, en la sociedad alemana. URN: urn:nbn:de:0114-fqs0903218 In diesem Beitrag wird der Frage nach der Transformation von Zugeh rigkeitskonstruktionen im Laufe des Lebens, eingebettet in die Familien- und Kollektivgeschichte, nachgegangen. Anhand der Falldarstellung dreier Frauen einer Familie, die als ethnische Deutsche aus der ehemaligen Sowjetunion Anfang der 1990er Jahre nach Deutschland einwanderten, zeigen wir, wie durch den Migrationsprozess und die Fremdzuschreibungen im Ankunftsland Fragen der Zugeh rigkeit ausgel st werden. Es wird deutlich, welche Strategien der biografischen Arbeit die unterschiedlichen Familienangeh rigen jeweils leisten. Dies ist auf ihre spezifischen lebensgeschichtlichen Erfahrungen – und damit verbunden ihre Zugeh rigkeit zu unterschiedlichen historischen Generationen – zurückzuführen. So werden bei der Gro mutter w hrend der Migration nach Deutschland die Erlebnisse der Deportation von der Wolgarepublik nach Sibirien im Zuge des Zweiten Weltkriegs reaktiviert und ihre Zugeh rigkeitskonstruktion als Wolgadeutsche wird verfestigt. Ihre Schwiegertochter hingegen n hert sich nach der Migration der Frage nach ihrer eigenen Zugeh rigkeit über die Frage nach der Zugeh rigkeit zu einer religi sen Wi
Encapsulation of vanadium complexes in inorganic or hybrid matrices via the sol-gel method: application to the epoxidation of allylic alcohols
Pellegrino, Rodolfo B.;Buffon, Regina;
Journal of the Brazilian Chemical Society , 2004, DOI: 10.1590/S0103-50532004000400014
Abstract: vanadium complexes have been encapsulated in inorganic (based on hydrolysis/condensation of tetramethylorthosilicate - tmos) and hybrid matrices (tmos plus a co-condensation agent) using the sol-gel method. the resulting solids were tested in the epoxidation of allylic alcohols in the presence of tert-butyl hydroperoxide (tbhp) as the oxidant agent at 70 oc. when the catalyst was based on [vo(salen)], the hybrid matrix led to higher initial turnover frequencies than the inorganic one for all tested alcohols (trans-3-phenyl-2-methyl-2-propen-1-ol, trans-2-hexen-1-ol, cis-2-hexen-1-ol, 1-octen-3-ol), which might be related to its higher pore diameter. although no vanadium leaching was observed during the catalytic reactions, recycling experiments with the hybrid catalyst and trans-2-hexen-1-ol showed that some loss of vanadium took place at every soxhlet washing (performed after every run, using ch2cl2): a total of 1.5 wt.% after three reactions. in four successive runs, keeping the initial molar ratios, conversions decreased from 100% to 85%, 65% and 40% (in 5h).
The covariance between relatives conditional on genetic markers
Yuefu Liu, Gerald B Jansen, Ching Y Lin
Genetics Selection Evolution , 2002, DOI: 10.1186/1297-9686-34-6-657
Abstract: (To access the full article, please see PDF)
Interstellar Solid Hydrogen
Ching Yeh Lin,Andrew T. B. Gilbert,Mark A. Walker
Physics , 2011, DOI: 10.1088/0004-637X/736/2/91
Abstract: We consider the possibility that solid molecular hydrogen is present in interstellar space. If so cosmic-rays and energetic photons cause ionisation in the solid leading to the formation of H6+. This ion is not produced by gas-phase reactions and its radiative transitions therefore provide a signature of solid H2 in the astrophysical context. The vibrational transitions of H6+ are yet to be observed in the laboratory, but we have characterised them in a quantum-theoretical treatment of the molecule; our calculations include anharmonic corrections, which are large. Here we report on those calculations and compare our results with astronomical data. In addition to the H6+ isotopomer, we focus on the deuterated species (HD)3+ which is expected to dominate at low ionisation rates as a result of isotopic condensation reactions. We can reliably predict the frequencies of the fundamental bands for five modes of vibration. For (HD)3+ all of these are found to lie close to some of the strongest of the pervasive mid-infrared astronomical emission bands, making it difficult to exclude hydrogen precipitates on observational grounds. By the same token these results suggest that (HD)3+ could be the carrier of the observed bands. We consider this possibility within the broader picture of ISM photo-processes and we conclude that solid hydrogen may indeed be abundant in astrophysical environments.
The Evaluation of Polyethylene/Clay Composite from Solid State NMR  [PDF]
Regina F. Nogueira, Maria Inês B. Tavares, Rosane A. S. San Gil, Ant?nio G. Ferreira
Materials Sciences and Applications (MSA) , 2011, DOI: 10.4236/msa.2011.25060
Abstract: Polymeric nanocomposites based on polyethylene (PE) and Brazilian natural montmorillonite clay (MN) were obtained by melt processing, using a twin-screw extruder. The main objective of this work is focusing on the characterization of composites materials by solid-state nuclear magnetic resonance (NMR). The solid-state NMR measurements were used to observe both polymer matrix (through carbon-13 and hydrogen nuclei) and the clay (silicon-29 and aluminum-27). The polymer matrix analyses were carried out applying solid state techniques, such as: cross-polarization magic angle spinning (CPMAS), variable contact time (VCT) and by the proton spin-lattice relaxation time in the rotating frame parameter (TH), detected from the resolved carbon-13 decay of the VCT experiment and through the determination of spin-lattice relaxation time, T1H (using low field NMR). The clay was analyzed by 29Si and 27Al, employing MAS NMR technique. From those techniques we can have principally response on clay dispersion in the polyethylene matrix, as well as the interactions between both components in the nanostructured material. The T1H response was an important result which showed, that the materials formed, presented different molecular domains (according to the domain size that varied from 25 to 50 nm, measured by relaxation), considering the clay dispersion mode in terms of intercalation and/or exfoliation in the polymer matrix.
Compara??o entre os métodos de Ziehl-Neelsen modificado e Acid-Fast-Trichrome para a pesquisa fecal de Cryptosporidium parvum e Isospora belli
Rigo, Carla R.;Franco, Regina Maura B.;
Revista da Sociedade Brasileira de Medicina Tropical , 2002, DOI: 10.1590/S0037-86822002000300002
Abstract: due to the importance of cryptosporidium parvum, cyclospora cayetanensis and isospora belli as opportunistic parasites, it is essential for laboratories to morphologically differentiate these coccidia. among the recommended methods for diagnosis of c. parvum and i. belli is the modified ziehl-neelsen stain (mzn) and recently a new technique, the acid-fast-trichrome (aft) was proposed. the purpose of this study was to compare the aft and mzn techniques regarding the detection of c. parvum and i. belli oocysts in stool samples of hiv-positive patients. according to the presence (n=60) or absence of diarrhea (n=60), two groups were selected for inclusion in this study. the stool samples were collected in 10% formalin solution and the pellets, obtained without and after centrifugation-concentration (500xg; 10 min), were submitted to both stain techniques. considering the positivity of the techniques (aft and mzn), we observed the superiority of mzn stain (n=19; 100% positive cases) over aft (n=8; 42.1%). the identification of the 101 truly-negative cases was possible with both techniques, but when the aft stain was used, the oocysts showed a variable inner stain degree, which resulted in false-negatives. enteric coccidiosis was more frequent among the patients who presented diarrhea (26.6%) compared to asymptomatic individuals (5%); c. cayetanensis was not detected in these groups. we were interested in evaluating the employment of aft for the cyclospora oocyst stain. based on the sensitivity and specificity obtained in this study (100%), we concluded that the mzn technique is still the most indicated for routine use in clinical analysis laboratories, for the diagnosis of cryptosporidiosis and isosporosis, especially when it was used together with the centrifugation procedure (500xg; 10 min). our results showed that with some improvements, aft would be a simple and inexpensive technique appropriate for use in the diagnosis of intestinal coccidia (c. parvum, c. cayetanen
Compara o entre os métodos de Ziehl-Neelsen modificado e Acid-Fast-Trichrome para a pesquisa fecal de Cryptosporidium parvum e Isospora belli
Rigo Carla R.,Franco Regina Maura B.
Revista da Sociedade Brasileira de Medicina Tropical , 2002,
Abstract: Devido a crescente importancia dos coccídios intestinais (Cryptosporidium, Isospora e Cyclospora) como parasitos oportunistas, é fundamental para os laboratórios diferenciar morfologicamente estes protozoários; a técnica de Ziehl-Neelsen modificada (ZNm) é amplamente utilizada para este fim; recentemente, foi proposto um novo procedimento, a colora o combinada do ácido tricr mico (Acid-Fast-Trichrome - AFT). O objetivo do presente estudo foi comparar os processos AFT e ZNm para a detec o destes coccídios em amostras fecais de pacientes portadores do vírus VIH. Foram selecionados dois grupos de indivíduos, para inclus o no estudo, segundo a presen a (n=60) ou ausência de diarréia (n=60). As amostras de fezes foram coletadas em solu o de formalina 10% e os esfrega os fecais preparados i) diretamente das fezes e ii) após concentra o prévia a 500xg (10 minutos), foram submetidos aos diferentes processos de colora o. Considerando-se a positividade por técnica (AFT e ZNm), verificou-se a superioridade do procedimento de ZNm (n=19; 100% dos casos positivos) sobre o de AFT (n=8; 42,1%). Ambos possibilitaram a identifica o dos 101 casos verdadeiramente negativos. Coccidiose intestinal foi mais frequente entre os pacientes que apresentaram diarréia (26,6%) em compara o à positividade observada entre os indíviduos assintomáticos (5%) sendo que C. cayetanensis n o foi detectada em ambos os grupos. Foi de nosso interesse avaliar a aplicabilidade da técnica AFT para a colora o deste protozoário. Devido à sensibilidade e especificidade obtida neste estudo (100%), conclui-se que o método de ZNm continua sendo o mais indicado para o diagnóstico da criptosporidiose e isosporose, principalmente quando associado ao procedimento de centrífugo-concentra o (500xg, 10 minutos). Embora a colora o AFT tenha baixo custo, faz-se necessário o seu aperfei oamento pois este procedimento permite o diagnóstico simultaneo dos coccídios intestinais (C. parvum, I. belli e C. cayetanensis) e dos microsporídios.
Tecnologia da informa o: uso da internet complementando atividades de ensino no curso de biblioteconomia
Ursula Blattmann,Gleisy Regina Bóries Fachin
Revista ACB , 1998,
Abstract: [Portuguese]Relata a experiência no uso de novas tecnologias da informa o no Curso de Biblioteconomia. Apresenta a quest o operacional sobre a utiliza o de interfaces na Internet. Reflete sobre mudan as advindas da informática na Biblioteconomia catarinense.
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