Características epidemiológicas y evolución de los pacientes con bacteriemia por Staphylococcus aureus ingresados en un Hospital de tercer nivel.

El objetivo del estudio fue describir las características epidemiológicas y los factores de riesgo de la bacteriemia por Staphylococcus aureus (BSA) en pacientes adultos atendidos en un hospital de tercer nivel. Se incluyeron 188 pacientes con BSA, 62 % hombres y con una edad media de 64±15,3 años. El 24% eran SARM. La mayoría provenían de servicios médicos (63,8%). El origen más frecuente de la BSA fue nosocomial (56,4%) seguido del relacionado con el ámbito sanitario (RAS) (28,7%) y comunitario (14,9 %). Presentaban enfermedad de base subyacente un 96%, siendo la más frecuente la neoplasia con un total de 65 pacientes (35 %). La enfermedad de base se consideró fatal en 38,3% pacientes, últimamente fatal en 22,3 % y no fatal en 39,4 %. El foco de infección resultó aparente en 151 pacientes (80,3%), siendo el más frecuente el catéter vascular (45,7 %). Presentaron fiebre el 73,9 %, leucocitosis un 44% y bandas en la analítica un 25%. Presentaron complicaciones el 36,2 % de los pacientes con BSA: shock (26,1%) y metástasis sépticas (14,4%). La evolución fue favorable en 126 pacientes (67%), mientras que 52 (27,7%) fallecieron, 43 de ellos (22,9%) en relación con al BSA y en 7 (3,7%) recidivó.

Impacto de la utilización de hígados de donantes anti-HBc positivo en pacientes trasplantados por hepatitis B

El nostre objectiu és avaluar l’impacte de la utilització de fetges de donants anti-HBc positius en pacients trasplantats per hepatitis B, els quals van ser revisats de manera retrospectiva. La probabilitat acumulada d’hepatitis B post-trasplantament al 1er, 5é i 10é any va ésser del 3,7%, 8,3% i 8,3% en els receptors d’un empelt anti-HBc+ en comparació amb el 2,7%, 9,8% i 9,8% en els que varen rebre un empelt anti-HBc- (p=0,99). La probabilitat de supervivència al 1er, 5é i 10é any dels receptors d’un òrgan anti-HBc+ va ésser del 87%, 82% i 58% front al 87%, 82% i 74% en els que varen rebre un anti-HBc- (p=0,73). La utilització de donants anti-HBc positius no afecta ni a la supervivència ni al desenvolupament de hepatitis B en pacients trasplantats per VHB.

The efficiency of direct payments versus tax reductions under uncertainty

This paper analyzes the optimal behavior of farmers in the presence of direct payments and uncertainty. In an empirical analysis for Switzerland, it confirms previously obtained theoretical results and determines the magnitude of the theoretical predicted effects. The results show that direct payments increase agricultural production between 3.7% to 4.8%. Alternatively to direct payments, the production effect of tax reductions is evaluated in order to determine its magnitude. The empirical analysis corroborates the theoretical results of the literature and demonstrates that tax reductions are also distorting, but to a substantially lesser degree if losses are not offset. However, tax reductions, independently whether losses are offset or not, lead to higher government spending than pure direct payments

Estudio de las complicaciones infecciosas asociadas a la biopsia hepática en el trasplante hepático ortotópico

Analizamos un total de 669 biopsias hepáticas (557 percutáneas y 92 transyugulares) realizadas en 286 pacientes receptores de trasplante hepático con la intención de identificar factores de riesgo para el desarrollo de complicaciones infecciosas en relación a la biopsia hepática. Identificamos un total de 25 complicaciones en 24 pacientes (incidencia global de 3,7%). De ellas, 14 correspondieron a complicaciones infecciosas (2,09%). El principal factor de riesgo en nuestra serie fue el hecho de que los pacientes se encontrasen hospitalizados en el momento del procedimiento, reflejo de la mayor gravedad de esta población. Dentro de la población nosocomial, obtuvimos diferencias estadísticamente significativas en relación a los niveles de albúmina, con un riesgo estimado 3,7 veces mayor de desarrollar una infección en aquellos pacientes con niveles inferiores a 2,4 mg/dL.

The extraordinarily bright optical afterglow of GRB 991208 and its host galaxy

Observations of the extraordinarily bright optical afterglow (OA) of GRB 991208 started 2.1 d after the event. The flux decay constant of the OA in the R-band is -2.30 +/- 0.07 up to 5 d, which is very likely due to the jet effect, and after that it is followed by a much steeper decay with constant -3.2 +/- 0.2, the fastest one ever seen in a GRB OA. A negative detection in several all-sky films taken simultaneously to the event implies either a previous additional break prior to 2 d after the occurrence of the GRB (as expected from the jet effect). The existence of a second break might indicate a steepening in the electron spectrum or the superposition of two events. Once the afterglow emission vanished, contribution of a bright underlying SN is found, but the light curve is not sufficiently well sampled to rule out a dust echo explanation. Our determination of z = 0.706 indicates that GRB 991208 is at 3.7 Gpc, implying an isotropic energy release of 1.15 x 10E53 erg which may be relaxed by beaming by a factor > 100. Precise astrometry indicates that the GRB coincides within 0.2' with the host galaxy, thus given support to a massive star origin. The absolute magnitude is M_B = -18.2, well below the knee of the galaxy luminosity function and we derive a star-forming rate of 11.5 +/- 7.1 Mo/yr. The quasi-simultaneous broad-band photometric spectral energy distribution of the afterglow is determined 3.5 day after the burst (Dec 12.0) implying a cooling frequency below the optical band, i.e. supporting a jet model with p = -2.30 as the index of the power-law electron distribution.

Iron supply for erythropoiesis in the rabbit

Marrow radioiron uptake and marrow blood flow were measured in order to evaluate iron supply for erythropoiesis. Normal, phenylhydrazine-treated and bled animals were studied. The plasma iron turnover of seven normal rabbits was 1.49 +/- 0.22 mg/dl whole blood per d, of 11 rabbits treated 4 d before with phenylhydrazine was 5.16 +/- 1.81, and of four bled animals the plasma iron turnover was 3.75 +/- 1.61. The cardiac output and the percentage of blood flow to the marrow was increased in phenylhydrazine-treated and bled animals. Marrow iron flow in phenylhydrazine-treated animals was 38.3 +/- 32.6 micrograms/min per kg as compared with control values of 7.0 +/- 1.3 (P less than 0.01). This was due to an increase in marrow flow, an increase in plasma iron, and an increase in plasmatocrit. In bled animals, in spite of an increased marrow blood flow, marrow iron flow of 7.3 +/- 2.2 was similar to that of control animals due to a lower plasma iron concentration. The calculated marrow iron extraction of 3.7 +/- 2.4% in phenylhydrazine-treated animals was not different from that of control animals of 4.3 +/- 1.1, whereas extraction was increased in bled animals to 7.9 +/- 1.3 (P less than 0.01). In additional studies of transfused animals, acutely induced anemia was associated with an increased cardiac output, but also with a relative decrease in marrow flow, which left marrow iron supply unaffected. It would appear from these studies that an important mechanism for meeting the increased iron requirement of the hyperplastic erythroid marrow is an increase in marrow blood flow.

Anàlisi d’un incendi en una nau industrial a Gavà. Conclusions per a l’aplicació del (RSCIEI) en naus de tipus A en horitzontal

1. SINISTRE D’UNA NAU INDÚSTRIAL A GAVÀ 2. ANÀLISI DE SINISTRES DE PÒRTICS ENTRE MITGERES 3. CONTROL DE LA FALLADA DE LES ESTRUCTURES AMB MESURES PASSIVES 3.1 Definició del model simulats 3.2 Paràmetres de càlcul amb OZONE 3.3 Corbes d’incendi resultants del model de zones 1D 3.4 Control tèrmic de l’estructura amb sistemes de ventilació 3.5 Control tèrmic de l’estructura amb aïllament 3.6 Taula de resultats 3.7 Conclusions 1D 4. SIMULACIÓ DELS INCENDIS AMB FIRE DYNAMICS SIMULATOR

¿Cómo se lee y escribe en línea?

Se pretende averiguar, en base a datos de una investigación en curso, cómo se lee y escribe en clase cuando cada aprendiz dispone de portátil, está conectado a la red y el libro de texto es digital.

Sobre las fronteras retóricas del español escrito

El artículo explora la presencia de elementos culturales y retóricos procedentes de la lengua nativa (L1) de un autor en sus escritos en segunda lengua (L2). Se resumen y comentan varias investigaciones de la Retórica Contrastiva, los Nuevos Estudios de Literacidad y la Traductología, que analizan las estrategias usadas por autores y traductores para ocultar o mostrar aspectos de su L1 en sus escritos en L2. También se analizan dos casos de escritura académica (de un latino que escribe en inglés y un quechua que lo hace en español), que aportan ejemplos de extralimitaciones en la corrección y de ocultación de rasgos culturales relevantes. Esos datos y las teorías permiten reflexionar sobre la gestión de la retórica y la cultura en los textos de los plurilingües, tanto desde una óptica de la construcción de la identidad como de la corrección de textos en clase.

A simple halide-to-anion exchange method for heteroaromatic salts and ionic liquids

A broad and simple method permitted halide ions in quaternary heteroaromatic and ammonium salts to be exchanged for a variety of anions using an anion exchange resin (A− form) in non-aqueous media. The anion loading of the AER (OH− form) was examined using two different anion sources, acids or ammonium salts, and changing the polarity of the solvents. The AER (A− form) method in organic solvents was then applied to several quaternary heteroaromatic salts and ILs, and the anion exchange proceeded in excellent to quantitative yields, concomitantly removing halide impurities. Relying on the hydrophobicity of the targeted ion pair for the counteranion swap, organic solvents with variable polarity were used, such as CH3OH, CH3CN and the dipolar nonhydroxylic solvent mixture CH3CN:CH2Cl2 (3:7) and the anion exchange was equally successful with both lipophilic cations and anions.

A need for determination of arsenic species at low levels in cereal-based food and infant cereals. Validation of a method by LC-ICPMS.

The present study arose from the need to determine inorganic arsenic (iAs) at low levels in cereal-based food. Validated methods with a low limit of detection (LOD) are required to analyse these kinds of food. An analytical method for the determination of iAs, methylarsonic acid (MA) and dimethylarsinic acid (DMA) in cereal-based food and infant cereals is reported. The method was optimised and validated to achieve low LODs. Ion chromatography-inductively coupled plasma mass spectrometry (LC-ICPMS) was used for arsenic speciation. The main quality parameters were established. To expand the applicability of the method, different cereal products were analysed: bread, biscuits, breakfast cereals, wheat flour, corn snacks, pasta and infant cereals. The total and inorganic arsenic content of 29 cereal-based food samples ranged between 3.7-35.6 and 3.1-26.0 microg As kg-1, respectively. The present method could be considered a valuable tool for assessing inorganic arsenic contents in cereal-based foods.

Synthesis of the two isomers of the potential sex pheromone of Thaumetopoea pityocampa (Lepidoptera, Notodontidae) and related model compounds

The synthesis of the major component of the sex pheromone secretion of the processionary moth, Tkawnztopoeja pltyocampa (Denis and Schiff.) (Lepidoptera, Notodontidae), (Z)-13-hexadecen-ll-ynyl acetate (1), the corresponding (E)-isomer (2) and the four structurally related model compounds (Z⁄E,Z,Z)-5,9,13-hexadecatrienyl acetate (3), (Z⁄E,Z,Z)-3,7,ll-hexadecatrienyl acetate (4), (Z⁄E,E,Z)-7,9,13-hexadecatrienyl acetate (5) and (Z)-7-hexadecen-5-ynyl acetate (6) is described.

A need for determination of arsenic species at low levels in cereal-based food and infant cereals. Validation of a method by LC-ICPMS.

The present study arose from the need to determine inorganic arsenic (iAs) at low levels in cereal-based food. Validated methods with a low limit of detection (LOD) are required to analyse these kinds of food. An analytical method for the determination of iAs, methylarsonic acid (MA) and dimethylarsinic acid (DMA) in cereal-based food and infant cereals is reported. The method was optimised and validated to achieve low LODs. Ion chromatography-inductively coupled plasma mass spectrometry (LC-ICPMS) was used for arsenic speciation. The main quality parameters were established. To expand the applicability of the method, different cereal products were analysed: bread, biscuits, breakfast cereals, wheat flour, corn snacks, pasta and infant cereals. The total and inorganic arsenic content of 29 cereal-based food samples ranged between 3.7-35.6 and 3.1-26.0 microg As kg-1, respectively. The present method could be considered a valuable tool for assessing inorganic arsenic contents in cereal-based foods.

A simple halide-to-anion exchange method for heteroaromatic salts and ionic liquids

A broad and simple method permitted halide ions in quaternary heteroaromatic and ammonium salts to be exchanged for a variety of anions using an anion exchange resin (A− form) in non-aqueous media. The anion loading of the AER (OH− form) was examined using two different anion sources, acids or ammonium salts, and changing the polarity of the solvents. The AER (A− form) method in organic solvents was then applied to several quaternary heteroaromatic salts and ILs, and the anion exchange proceeded in excellent to quantitative yields, concomitantly removing halide impurities. Relying on the hydrophobicity of the targeted ion pair for the counteranion swap, organic solvents with variable polarity were used, such as CH3OH, CH3CN and the dipolar nonhydroxylic solvent mixture CH3CN:CH2Cl2 (3:7) and the anion exchange was equally successful with both lipophilic cations and anions.