Comparative study of the action of two different types of bleaching agents activated by two different types of irradiation fonts: xenon plasma arc lamp and 960 nm diode laser; Avaliacao da cor e estudo comparativo da acao de dois tipos diferentes de agentes clareadores ativados pelo laser de diodo e lampada xenonio plasmatica, na superficie do esmalte

Energy Technology Data Exchange (ETDEWEB)

Walverde, Debora Ayala

2001-07-01

This in vitro study compares two different types of tooth bleaching agents stimulated with two different irradiation fonts. These fonts accelerate the action of the bleaching agents upon the enamel surface by heating up the materials. We used the xenon plasma arc lamp and a 960 nm fiber-coupled diode laser to irradiate the two materials containing 35% of hydrogen peroxide (Opus White and Opalescence extra). The color of the teeth was measured with a spectrophotometer using the CIELAB color system that gives the numeric values of L{sup *}a{sup *}b{sup *}. (author)

Revista de tesis de la Facultad de Medicina de Bogotá

Directory of Open Access Journals (Sweden)

Facultad de Medicina Revista

1943-04-01

Full Text Available La prueba de la histamina para el diagnóstico precoz de la lepra. Tesis de grado, declarada Meritoria. 1942. - Por Antonio Jasbon Mantilla / Tratamiento qulrúrgico de las glomerulonefritis. Tesis de grado, declarada meritoria. 1942. - Por Lope Carvajal Peralta / Contribución al tratamiento de la osteomielitis por el bacteriofago Estafilococcico.  Tesis de grado. 1942. - Por Manuel J. Gutiérrez H. / Clorurraquia, cloremia total y plasmatica en 200 casos patologicos. Tesis de grado. 1942. - Por Luis Enrique Peña P. / Estudio clínico y anatomopatológico de las verrugas y nodulos subcutáneos de la bartonellosis humana o enfermedad de carrion. Tesis de grado. 1942. - Por Aurelio Benavides D.

Homocisteina plasmatica en infectados con el virus de la inmunodeficiencia humana

Directory of Open Access Journals (Sweden)

G. de Larrañaga

2003-10-01

Full Text Available La hiperhomocisteinemia moderada es un factor de riesgo para el desarrollo de enfermedad vascular aterosclerótica. Sus niveles plasmáticos están condicionados por factores nutricionales y farmacológicos, tabaquismo, algunos estados metabólicos y edad. En pacientes HIV+, el síndrome de malabsorción o las diarreas crónicas podrían afectar los niveles de homocisteína (Hcy, como también, ciertos efectos adversos de las nuevas terapias antirretrovirales (síndrome de lipodistrofia: insulino resistencia y/o dislipemias. Se evaluaron los niveles de Hcy en 53 pacientes HIV+ sin tratamiento alguno y en 75 HIV+ bajo tratamiento sin alteraciones metabólicas (n=32 o con ellas (n=43. Grupo control: 31 individuos HIV negativos. Se correlacionaron con los niveles de folatos, vitamina B12, lípidos, status de insulino resistencia, marcadores de activación plaquetaria (P-selectina soluble y daño endotelial (trombomodulina soluble como así también su relación con el tabaquismo, estadio de la enfermedad y tipo de tratamiento. No hubo diferencias estadísticamente significativas en los niveles medios de vitamina B12, Hcy, P-selectina y status de insulino-resistencia entre los controles y los HIV+. El 16.4 % de los 128 pacientes HIV+ y el 12.9% de los 31 del grupo control presentaron una Hcy >15 µmol/L (p=0.617. Los niveles de Hcy correlacionaron con los niveles de ácido fólico (Rho=-0.314, pWeak hyperhomocysteinemia is a risk factor for the development of atherothrombotic vascular complication. Their plasma levels are affected by nutritional and pharmacologic factors, tobacco, certain metabolic state and gender. In HIV+ patients, the wasting syndrome or chronic diarrheas could affect the levels of homocysteine (Hcy, as well as some adverse effects of the new antiretroviral therapies (lipodystrophy syndrome: insulin resistance and/or dislypemia. The levels of Hcy were evaluated in 53 HIV+ patients without any treatment and in 75 HIV+ under treatment with and without metabolic disturbances (n=43; n=32, respectively. Control group: 32 HIV negative individuals. We looked for association with folic acid, vitamin B12, lipids, insulin resistance status, activation platelets (soluble P-selectin and endothelial injury (soluble trombomodulin markers; and also their relation with tabacco, disease status and kind of treatment. There were no statistically significant differences in the mean levels of vitamin B12, Hcy, P-selectin and insulin resistance status between the control group and the HIV+; 16.4% of the 128 HIV+ patients had Hcy >15 µmol/L and the control group had 12.9 % (p=0.617. The levels of Hcy correlated with the levels of folic acid (Rho=-0.314, p<0.01 and age (Rho=0.277, p<0.01 among HIV+. There were no statistically significant differences in the levels of Hcy neither between smokers and non smokers (p=0.452 nor between HIV+ AIDS or HIV+ no AIDS (p=0.774 nor with the use of certain antiretrovirals (p=0.801. The hyperhomocysteinemia (a well known atherothrombotic risk factor is not frequently associated with HIV infected patients. The levels of Hcy would not seem to be influenced either by the HIV condition or by the antiretroviral treatments or their adverse effects.

A reflectivity profilometer for the optical characterisation of grade reflectivity mirrors in the 250 nm - 1100 nm spectral region

Energy Technology Data Exchange (ETDEWEB)

Colucci, Alessandro; Nichelatti, Enrico [ENEA, Centro Ricerche Casaccia, Rome (Italy). Dipt. Innovazione

1998-04-01

It`s developed the prototype of an instrument that can be used for the optical characterisation of graded reflectivity mirrors at any wavelength in the spectral region from 250 nm to 1100 nm. The instrument utilises a high-pressure Xe arc lamp as light source. Light is spectrally filtered by means of a grating monochromator. The sample is illuminated with an image of the monochromator exit slit. After reflection from the sample, this image is projected onto a 1024-elements charge-coupled device linear array driven by a digital frame board and interfaced with a personal computer. It`s tested the instrument accuracy by comparing measurement results with the corresponding ones obtained by means of a laser scanning technique. Measurement Rms repeatability has been estimated to be approximately of 0.8%. [Italiano] E` stato sviluppato il prototipo di uno strumento per la catatterizzazione ottica di specchi a riflettivita` variabile, operante a qualsiasi lunghezza d`onda nell`intervallo spettrale da 250 nm a 1100 nm. La sorgente dello strumento e` una lampada ad arco allo Xenon ad alta pressione. La luce e` filtrata spettralmente per mezzo di un monocromatore a reticolo. Il campione viene illuminato da un`immagine della fenditura d`uscita del monocromatore. Dopo essere stata riflessa dal campione, questa immagine viene proiettata su un array CCD lineare a 1024 elementi, connesso elettronicamente a una scheda digitale e interfacciato a un personal computer. L`accuratezza dello strumento e` stata verificata confrontando alcune misure con le corrispondenti misure ottenute mediante una tecnica a scansione laser. La ripetibilita` RMS delle misure e` stata stimata essere circa dello 0.8%.

Time dependent analysis of Xenon spatial oscillations in small power reactors; Analise temporal das oscilacoes espaciais de Xenonio em reatores de pequeno porte

Energy Technology Data Exchange (ETDEWEB)

Decco, Claudia Cristina Ghirardello

1997-07-01

This work presents time dependent analysis of xenon spatial oscillations studying the influence of the power density distribution, type of reactivity perturbation, power level and core size, using the one-dimensional and three-dimensional analysis with the MID2 and citation codes, respectively. It is concluded that small pressurized water reactors with height smaller than 1.5 m are stable and do not have xenon spatial oscillations. (author)

Standardization of the method for measurement of plasma estrone by radioimmunoassay; Padronizacao do metodo de dosagem de estrona plasmatica por radioimunoensaio

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Vilanova, M.S.V.; Moreira, A.C.; Sala, M.M. de; Sa, M.F.S. de [Sao Paulo Univ., Ribeirao Preto, SP (Brazil). Faculdade de Medicina

1994-10-01

The present paper has as objective standardize a radioimmunoassay method for measurement of plasma estrone. Ethyl ether was used for plasma extraction. The sensitivity (Minimal detectable dose) was 3,7 pg/tube; the reproducibility (inter assay error) was 8,6%; the precision (intra assay error) was 4,1%. As a biological control the plasma estrone was ml and in 24 patients with polycystic ovarian syndrome (median = 77,9 pg/ml). (author). 6 refs, 2 figs, 2 tabs.

Microstructural analysis of clayey ceramic incorporated with fluorescent lamp glass; Analise microestrutural de ceramica vermelha incorporada com vidro de lampada fluorescente

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Morais, A.S.C.; Caldas, T.C.C.; Pereira, P.S.; Monteiro, S.N.; Vieira, C.M.F., E-mail: allinescmorais@yahoo.com.br [Universidade Estadual do Norte Fluminense Darcy Ribeiro (LAMAV/UENF), Campos dos Goytacazes, RJ (Brazil). Laboratorio de Materiais Avancados

2011-07-01

This study aims to evaluate the effect of the incorporation of glass powder fluorescent lamp, from a decontamination process, in the microstructure of clayey ceramic. Formulations were prepared with incorporation of the waste in amounts of up to 10 wt.% into the clayey body. Specimens were prepared by uniaxial mold-press at 20 MPa and then fired at 850 and 1050°C. After firing, the microstructure of the ceramics was evaluated by optical microscopy (OM), scanning electron microscopy (SEM) and X-ray diffraction (XRD). The results showed that the incorporation of glass powder into the clayey body changes the microstructure of the ceramics. (author)

Comparative analysis of high pressure sodium vapor lamps and mercury vapor lamp with the solid state (LED) in the public lighting systems; Analise comparativa das lampadas de vapor de sodio a alta pressao e de vapor de mercurio com a lampada a estado solido (LED) em sistemas de iluminacao publica

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Damato, J.C.; Bueno, J.E.; Astorga, O.A.M. [Universidade Estadual Paulista (LESIP/UNESP), Guaratingueta, SP (Brazil). Lab. de Eficiencia Energetica em Sistemas de Iluminacao Publica; Ricciulli, D.L.S. [Universidade Estadual Paulista (DEE/UNESP), Guaratingueta, SP (Brazil). Dept. de Engenharia Eletrica

2009-07-01

The necessity of energy conservation in Brazilian electric sector, with the intention to diminish the resources of generation investments, has going to use of electric energy conservation programs, being most important PROCEL - a national program of electric conservation energy by ELETROBRAS, and inside this, a national program for public illumination and efficient traffic signaling - named 'Reluz'. This program looks for a more efficient implantation of public lighting systems, that requires the use of lamp technologies that present a greater value in a relation between lumen/watt relation and then beyond providing economy, due to low consumption of electric energy. Besides technologies that are appearing, the inclusion of LED lamps, which offers a great application potential, comes blunting as improvement alternative, being that the next public illumination parks will be able count on these lamps associates to the high-pressure sodium lamps and other types currently used. (author)

Use of efficient lamps in Brazil and the energetic and environmental gains; Emprego de lampadas eficientes no Brasil e os ganhos energeticos e ambientais

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Haddad, Jamil; Nogueira, Luiz Augusto Horta; Cardoso, Rafael Balbino; Souza, Edson Palhares de [Universidade Federal de Itajuba (EXCEN/UNIFEI), MG (Brazil). Centro de Excelencia em Eficiencia Energetica], emails: jamil@unifei.edu.br, horta@unifei.edu.br, cardosorb@unifei.edu.br, palharess@unifei.edu.br

2010-07-01

This study esteem the energy, environmental and economical impacts the use of compact fluorescent lamps - CFL's in the Brazilian residential sector, considering data of the illumination systems ownership and use habits research in the sector, accomplished by PROCEL. According to evaluation the introduction of more efficient lamps in the sector resulted in 12.2 thousand GWh of energy saving (14.5% of the sector consumption) and in 4.4 GW of reduction in the pick demand (7% annual maximum demand registered) in 2005. The study also indicates positive impacts of the environmental and economical view point. (author)

Evaluation of the energetic impact of the use of compact fluorescent lamps in the residential sector of Brazil; Avaliacao do impacto energetico do uso de lampadas fluorescentes compactas no setor residencial brasileiro

Energy Technology Data Exchange (ETDEWEB)

Cardoso, Rafael Balbino; Haddad, Jamil; Nogueira, Luiz Augusto Horta [Universidade Federal de Itajuba (UNIFEI), MG (Brazil)], e-mail: cardosorb@unifei.edu.br, e-mail: jamil@unifei.edu.br, e-mail: horta@unifei.edu.br

2008-07-01

Among the actions taken after the crisis of electricity supply at the beginning of this decade, the replacement of incandescent lamps for compact fluorescent lamps (CFL's, about four times more efficient than the incandescent) is one of most important. This paper develops an assessment of the impact of this measure in terms of energy saved and demand reduction, especially associated with the use of CFL's lamps in the residential sector. According to this study, which took into account the park of lamps installed in Brazilian households (38% efficient) and an average time of use of 1,000 hours per year, nowadays lightning in the residential sector corresponds to a peak demand reduction for 4,800 MW and a consumption of about 16,000 GWh, approximately 20% of whole residential sector consumption in 2005. The introduction of more efficient lamps has induced an economy of 6,858 GWh, approximately 8% of consumption observed in 2005. (author)

Experimental program of substitution of incandescent light bulb by circular and compact fluorescence lights in the residential sector; Programa experimental de substituicao de lampadas incandensentes por fluorescentes circulares e compactas no segmento residencial

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Fugiwara, Jose Kozi; Campos Filho, Marcello de Moura [Companhia Paulista de Forca e Luz (CPFL), Campinas, SP (Brazil); Santos, Vanice Ferreira dos [Universidade Estadual de Campinas, SP (Brazil)

1995-12-31

This work discusses the influence of the residential sector in the Brazilian consumption of electric power and the importance of electric power conservation in residential illumination. A case study is presented. Finally, the perspectives for the utilization of this tool in electric power conservation for market planning is presented 1 tab., 6 refs.

Study of factors that interfere in the labelling process of erythrocytes and plasma proteins with Technetium-99m; Estudo de fatores que interferem no processo de marcacao de hemacias e proteinas plasmaticas com tecnecio-99m

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Gutfilen, Bianca

1990-12-31

The labelling of red blood cells (RBC) with technetium-99m (Tc-99m) depends on several factors, as the stannous ion (Sn++) concentration, time, temperature, the presence of plasma proteins (PP) and others. However the Sn++ concentration seems to be the most important factor; probably because the uptake of this reducing agent by RBC is limited. The excess of Sn++ in extracellular medium can determine the labelling of PP. the modifications of RBC at 50 deg C described in the literature, the possibility of labelling RBC with Tc-99m at this temperature and experimental results obtained made it possible to perform spleen selective scintigraphy through a simple technique with few manipulations. The effect of gentamicin, nifedipine and verapamil in the labelling of RBC and plasma proteins with Tc-99m was studied because of similarities between Ca++ and Sn++. The results show that, under some conditions, these drugs are capable to alter this Tc-99m incorporation. The modification of the ionic distribution determined by these drugs or the blockage of Sn++ and/or Tc-99m or the fact that they bind theirselves to plasma proteins, or the possibility of the labelling of these drugs, are factors that can interfere in the labelling process of red blood cells and plasma proteins with Tc-99m. (author) 55 refs., 12 figs., 5 tabs.

Study of factors that interfere in the labelling process of erythrocytes and plasma proteins with Technetium-99m; Estudo de fatores que interferem no processo de marcacao de hemacias e proteinas plasmaticas com tecnecio-99m

Energy Technology Data Exchange (ETDEWEB)

Gutfilen, Bianca

1989-12-31

The labelling of red blood cells (RBC) with technetium-99m (Tc-99m) depends on several factors, as the stannous ion (Sn++) concentration, time, temperature, the presence of plasma proteins (PP) and others. However the Sn++ concentration seems to be the most important factor; probably because the uptake of this reducing agent by RBC is limited. The excess of Sn++ in extracellular medium can determine the labelling of PP. the modifications of RBC at 50 deg C described in the literature, the possibility of labelling RBC with Tc-99m at this temperature and experimental results obtained made it possible to perform spleen selective scintigraphy through a simple technique with few manipulations. The effect of gentamicin, nifedipine and verapamil in the labelling of RBC and plasma proteins with Tc-99m was studied because of similarities between Ca++ and Sn++. The results show that, under some conditions, these drugs are capable to alter this Tc-99m incorporation. The modification of the ionic distribution determined by these drugs or the blockage of Sn++ and/or Tc-99m or the fact that they bind theirselves to plasma proteins, or the possibility of the labelling of these drugs, are factors that can interfere in the labelling process of red blood cells and plasma proteins with Tc-99m. (author) 55 refs., 12 figs., 5 tabs.

Radioimmunoassay method for measurement of plasma androstenedione. Its validation in ovulatory women and in patients with polycystic ovarian syndrome; Metodo de radioimunoensaio para medida da androstenediona plasmatica. Validacao em mulheres ovulatorias e com sindrome dos ovarios policisticos

Energy Technology Data Exchange (ETDEWEB)

Vilanova Socorro Veras, Maria do; Silva e Rosa, Alzira Amelia; Moura, Marcos Dias de; Ferriano, Rui Alberto; Sa, Marcos Felipe Silva de [Sao Paulo Univ., Ribeirao Preto, SP (Brazil). Faculdade de Medicina

1995-01-01

The present paper has as objective the standardization of a radioimmunoassay method for measurement of androstenedione. Ethyl ether was used for plasma extraction. The sensitivity of the method was 6,8 pg/tube; the reproducibility (inter assay error) was 15,6%; the precision (intrassay error) was 5,2%. As biological control, 20 ovulatory women showed median plasma values of 1250 pg/ml and 24 women with polycystic ovary syndrome presented median plasma values of 2.037 pg/ml. (author). 6 refs., 2 figs., 1 tab.

An Assessment of those Metabolites Considered to be of Value in the Diagnosis of Exposure to Radiation; Evaluation des Metabolites Consideres Comme Utiles dans le Diagnostic des Expositions aux Rayonnements; 041e 0426 0414 ; Evaluacion de los Metabolitos Considerados Utiles para Diagnosticar la Exposicion a las Radiaciones

Energy Technology Data Exchange (ETDEWEB)

Smith, H.; Bates, T. H. [United Kingdom Atomic Energy Authority, Chapelcross, Annan, Scotland (United Kingdom)

1965-06-15

entre tres y cinco semanas. Mientras duro el tratamiento, se determino cuantitativamente la excrecion urinaria de los siguientes compuestos: creatinina, creatina, nitrogeno a-aminado total, acido {beta}-aminoisobutirico, acido pirrol-2-carboxflico, acido 5-hidroxi-indolacetico y sulfato de indoxilo. Si bien ninguno de los pacientes se sometio a una irradiacion del organismo entero, se comprobo que las modificaciones en la funcion metabolica que resultan de lesiones radioinducidas pueden reflejarse en la excrecion urinaria. Los autores examinan en la memoria las razones de orden bioquimico y la interpretacion de los esquemas de excrecion en relacion con la parte del organismo irradiada; pero, en el estado actual de las investigaciones, llegan a la conclusion de que no es posible evaluar cuantitativamente las lesiones biologicas. No obstante, esas pruebas pueden facilitar la eleccion de la terapia por el clinico. Los resultados de ensayos preliminares sobre las modificaciones experimentadas por determinados metabolitos plasmaticos en ratas expuestas a una sola dosis subletal de rayos X merecen ser extrapoladas y aplicadas a los estudios de casos humanos. Se han medido las concentraciones plasmaticas de las siguientes sustancias: 5-hidroxitriptamina, acido urico, transaminasa glutamo-oxalacetica, transaminasa glutamo-piruvica (ambas en el suero), fracciones globulfnicas, creatfn-fosfoquinasa, leucin-aminopeptidasa, lisil-aminopeptidasa, calicrefna, calidina, cinc y manganeso. Despues de la irradiacion se observaron considerables cambios de caracter cualitativo en la concentracion plasmatica de acido urico, leucin-aminopeptidasa, lisil-aminopeptidasa y manganeso. En la memoria se examina el significado de estos datos. En estos estudios se ha atribuido particular importancia a los procedimientos adoptados, que son sencillos y de aplicacion rapida. (author) [Russian] Izuchalis' nekotorye metabolity, vydelennye s mochej y ljudej, podvergnutyh rentgenovskomu i gamma

Software for calculation the number of lamps, luminaries and its distribution in the environment aiming the efficient use of electric power; Software para o calculo do numero de lampadas, luminarias e da distribuicao no ambiente visando o uso eficiente da energia eletrica

Energy Technology Data Exchange (ETDEWEB)

Souza, Teofilo Miguel de; Bianchi, Inacio [Universidade Estadual Paulista (UNESP), Guaratingueta, SP (Brazil). Dept. de Engenharia Eletrica. Centro de Energias Renovaveis], e-mail: teofilo@feg.unesp.br, e-mail: ibianchi@feg.unesp.br

2004-07-01

In Brazil artificial lighting contributes with expressive value to electric power consumption. Good performance of lighting system depends of criterion fixed on the electric design conception that takes into account the information about lamps, environment and type of work carried on the local. This paper presents an easy of use and low computational requirements software used to choice lamps, fixtures and its lay-out aiming a good and efficient illumination system design. Its textual format results are displayed at the video monitor, and stored in files, and can be printed and attached to the technical memorial report. So, a presentation of several design options can be furnished quickly through the software for an economic pre-analysis of illumination design. (author)

Technical and economic feasibility of the use of discharge lamps in replacement of filament for induction of photoperiod in chrysanthemum seedlings production; Viabilidade tecnico-economica do uso de lampadas de descarga em substituicao as de filamento para inducao de fotoperiodo na producao de mudas de crisantemos

Energy Technology Data Exchange (ETDEWEB)

Rossi, Luiz A.; David, Eduardo [Universidade Estadual de Campinas (FEAGRI/UNICAMP), SP (Brazil). Fac. de Engenharia Agricola], E-mail: rossi@feagri.unicamp.br; Pagliardi, Odail [Faculdade Municipal Prof. Franco Montoro (FMPFM), Mogi Guacu, SP (Brazil); Sarubbi, Juliana [Universidade Federal de Santa Maria (CESNORS/UFSM), Palmeira das Missoes, RS (Brazil). Centro de Educacao Superior Norte-RS

2010-07-01

Due to its physiological characteristics, the seedlings of chrysanthemums require supplemental light to prevent bud formation, that is done at night. This article examines the technical and economic valuation to replace the current technology of artificial lighting used by producers (incandescent bulbs) for the purpose of inducing photoperiod in a protected environment for cutting-discharge lamps, with the goal of reducing the consumption electricity used in the process. The analysis showed that the integrated compact fluorescent yellow lamp 23W is the technically and economically feasible for such replacement. (author)

Technical and economic modeling of the presence sensor adjust influence on the lamps useful life and the economy of energy - case study at the University of Sao Paulo, BR; Modelagem tecnico-economica da influencia do ajuste de sensores de presenca sobre a vida util das lampadas e a economica de energia - estudo de caso na universidade de Sao Paulo

Energy Technology Data Exchange (ETDEWEB)

Saidel, Marco Antonio; Gimenes, Andre Luiz Veiga; Capello, Ricardo Machado; Peng, Tang [Universidade de Sao Paulo (USP), SP (Brazil). Dept. de Engenharia de Energia e Automacao Eletricas. Grupo de Energia]. E-mail: saidel@pea.usp.br; gimenes@gmail.com; ricmc@ig.com.br; tpbrazil@gmail.com

2006-07-01

This paper evaluates the technical and economic viability through three main types of presence sensors in the market: the infrareds, the ultrasonics and the dual. With this objective, behavioural simulations modeled in classrooms of the university of Sao Paulo, validated by field survey for evaluating the energy reduction potential and impacts in the service life of the lamps. (author)

Comparison of Clinical and Laboratory Responses in Sheep and Dogs following Whole-Body Exposures to 250-Kvp X-Rays and Fission-Spectrum Neutrons; Etude Comparee Clinique et en Laboratoire, des Reactions de Moutons et de Chiens a la Suite d'une Exposition du Corps Entier a des Rayons X de 250 Kv-Crete et a des Neutrons de Fission; Sravnenie klinicheskikh i laboratornykh dannykh o reaktsii ovets i sobak na obluchenie vsego tela rentgenovskimi luchami pri pikovom napryazhenii 250 Kv i nejtronami spektra deleniya; Estudio Comparado, Clinico y de Laboratorio, de las Reacciones de Ovejas y Perros Consecutivas a la Irradiacion del Cuerpo Entero con Rayos X de 250 KVp y Neutrones de Fision

Energy Technology Data Exchange (ETDEWEB)

Quaife, M. A.; Boer, J. de; Jones, R. K.; Ichiki, A. T.; Godden, W. R.; Davis, H.; Engel, R. E. [Kirtland AFB, New Mexico (United States)

1964-05-15

jour, la mortalite chez les chiens a ete de 50% pour les sujets exposes aux neutrons et de 93% pour les sujets exposes aux rayons X. Chez les moutons, les neutrons ont cause une mortalite de 22% et les rayons X une mortalite de 80%. (author) [Spanish] Los autores expusieron 15 ovejas y 8 perros a una dosis de 400 rad (en el aire) de un espectro pulsante de neutrones de fision y el mismo numero de ovejas y 14 perros a una dosis de 400 r (dosis media, en el aire) de rayos X de 250 kVp. Ademas, emplearon como testigos 7 ovejas y 4 perros sin irradiar. Efectuaron observaciones durante dos semanas, antes de proceder a la exposicion y, luego, a intervalos frecuentes y regulares una vez provocadas las lesiones. En las ovejas, la alteracion clinica mas sistematica fue la perdida total de la lana a los 51 dias de la exposicion. La piel subyacente presentaba un color rosado semejante a la leve erubescencia que se observa a veces en el hombre. Los perros no perdieron el pelo. El numero de polinucleares, neutrofilos, linfocitos y trombocitos disminuyo rapidamente despues de la irradiacion en ambas especies. Solamente en los grupos irradiados con neutrones, alrededor de 24 dias despues de la irradiacion se registro un restablecimiento del numero de globulos blancos. El indice de trombocitos disminuyo en ambas especies, un poco antes en el perro que en la oveja. En ambas especies, a la tercera semana a contar de la irradiacion, se observo que se restablecian los valores normales en los animales expuestos a los neutrones, pero no en aquellos sometidos a la accion de los rayos X. En ambos grupos de perros, al noveno dia se registro una reduccion importante del indice hematocrito, pero no ocurrio lo mismo con ninguno de los grupos de ovejas expuestos. Como parametro para la determinacion de la funcion hematopoyetica, se determinaron los indices de depuracion plasmatica del {sup 59}Fe en los sujetos estudiados. Los autores estudian la posibilidad de aplicar las alteraciones de este

Electrolyte Concentrations of Intra- and Extracellular Compartments in Some Internal Diseases; Concentration des Electrolytes dans les Compartiments Intra- et Extracellulares, dans Certaines Maladies Internes; ВНУТРИКЛЕТОЧНАЯ И ВНЕКЛЕТОЧНАЯ КОНЦЕНТРАЦИЯ ЭЛЕКТРОЛИТОВ ПРИ НЕКОТОРЫХ ВНУТРЕННИХ ЗАБОЛЕВАНИЯХ; Concentraciones de Electrolitos en Comp Artimientos Intra y Extracelulares en Algunas Enfermedades Internas

Energy Technology Data Exchange (ETDEWEB)

Itahara, K.; Ito, K.; Tominaga, T.; Jimbo, T.; Sato, T. [Tohoku University, Sendai (Japan)

1963-03-15

26,6 (valor normal: 28,4). Por consiguiente, se estima que en estos pacientes el potasio se excreta con la orina como consecuencia de un incremento de la depuracion plasmatica, y que el contenido de potasio disminuye en el organismo entero. De dos casos de aldosteronismo primario uno, con ataques de paralisis, presentaba un valor incrementado (37.2) de esta razon de las concentraciones de potasio, y el otro caso que no sufria ataques de paralisis, dio un valor normal (29,5). En otros dos enfermos con paralisis periodica no hereditaria, la razon de concentracion del potasio extra e intracelular era, respectivamente, de 42,8 y 48,7 durante el ataque inducido, mientras que la excrecion del. potasio por la orina no habia aumentado. Se demostro que la transmineralizacion se habia extendjdo de los fluidos extracelulares a los intracelulares. Al inducir con glucosa e insulina una paralisis completa o incompleta en ocho pacientes con antecedentes de paralisis, se encontro en cinco de ellos una razon de concentracion superior a 38,0 durante cada ataque. Tambien se observo que el incremento de este valor guarda una relacion con el grado de paralisis. Por lo tanto, la patogenesis de la paralisis parece ser debida no solamente a un incremento del potencial muscular en reposo sino tambien a la diferencia entre las concentraciones intra y extracelulares del potasio. En el cuadro I se indican las composiciones electroliticas observadas en estas enfermedades. (author) [Russian] V 1959 godu na tret'ej Vsejaponskoj konferencii po radioizotopam nami bylo sdelano soobshhenie ob izmerenii obshhego kolichestva vody v organizme (s pomoshh'ju D{sub 2}0), ob{sup e}ma vnekletochnoj zhidkosti (o pomoshh'ju mannita), obshhego obmenivaemogo natrija i kalija u bol'nyh s otekami i gipertonicheskoj bolezn'ju. V dannoj rabote avtory soobshhajut rezul'taty issledovanij koncentracii natrija i kalija vo vnekletochnoj i vnutrikletochnoj zhidkosti s ispol'zovaniem radioaktivnogo natrija Na{sup 24} i