Acquired-Transient Factor X Deficiency in a Teenager with Extensive Burns

Acquired factor X deficiency is an extremely rare situation. It has shown to be associated with systemic amyloidosis, respiratory mycoplasma infection, factor X inhibitors, antiphospholipid antibodies, vitamin K defi ciency/liver disease as well as the use of certain medications (meropenem, valproic acid). The pathogenesis and transient nature of this deficit remain poorly understood. The authors describe the case of a teenager hospitalised for extensive burns that developed active bleeding after removal of central venous catheter. He was diagnosed with transient factor X deficiency. Normalisation of coagulation status and factor X levels occurred spontaneously 10 days after the bleeding episode

Familial Sneddon's syndrome

A syndrome associating Livedo Reticularis (LR) with Cerebrovascular disease (CVD) was described, in 1965, by Sneddon. It occurs sporadically, but a few familial cases of Sneddon's Syndrome (SS) have been reported, like these 3 cases that represent one of the largest number among siblings. We studied three male brothers, aged 28, 37 and 42 years, with CVD (ischaemic stroke in 2 patients and cerebral haemorrhages in the third) and their sister with no CVD. All patients presented with long lasting Livedo Reticularis, extending beyond the lower limbs. Skin biopsy on the centre of the reticular pattern showed, only in the second patient, partial endothelium detachment in dermo-hypodermic blood vessels. The males also had accesses of Livedoid Vasculitis (LV), in which a skin biopsy showed obliteration of several upper dermal vessels with hialin thrombi and a very scarce inflammatory infiltrate. Complementary studies, with an extensive investigation on pro-coagulation/pro-thrombotic features including antiphospholipid antibodies, were repeatedly negative. Their non-consanguineous parents were not affected, but among these kindred of 9 individuals, apart from the 4 patients reported above, LR and LV were present in two other brothers and also in an aunt and uncle, suggesting autosomal dominant pattern of inheritance, with incomplete penetrance. The relationship between Sneddon's Syndrome and Antiphospholipid Antibody Syndrome is controversial. The present cases, having repeatedly negative antiphospholipid antibodies, support the classification of Sneddon's Syndrome as an independent nosological entity

Effect of coastal-trapped waves and wind on currents and transport in the Gulf of California

The article of record as published may be located at http://dx.doi.org/10.1002/2013JC009538Subsurface pressure (SsP) observations from stations inside and outside of the Gulf of California (GC) are used to analyze the relationship between low-frequency currents, temperature, and transport inside the GC and intraseasonal coastal-trapped waves (CTWs), which propagate poleward along the coast toward the GC. Correlation functions and coherences of SsP stations were consistent with intraseasonal CTWs splitting in two at the mouth of the gulf: one part enters the gulf, propagates around the gulf, and eventually, toward the mouth, and another part that appears to ‘‘jump’’ the mouth of the gulf and travels poleward along the west coast of the peninsula. The correlation and coherence estimates of SsP at Manzanillo with currents showed that downwelling CTWs generated along-gulf current anomalies toward the head of the gulf at the mainland shelf of the mouth, whereas at Ballenas Channel sill (San Lorenzo sill) these waves generated current anomalies toward the mouth near the surface (bottom). At the San Lorenzo (SL) sill, downwelling CTWs increased the near-bottom ( 400 m) temperature and reduced the bottom transport of deep, fresher, and colder water that flows toward the head of the gulf. Cross-Calibrated Multiplatform winds were used to investigate their relationship with currents. The first empirical orthogonal function of the along-gulf wind stress showed that wind blowing toward the head of the gulf generated a reduction of bottom transport toward the head of the gulf through the SL sill, and intensified surface geostrophic current fluctuations toward the head of the gulf. There was also significant correlation between inflow bottom transport and outflow surface geostrophic velocities averaged across the gulf, consistent with the exchange pattern for the Northern Gulf.This work was funded by CONACyT through grants G33464-T, 38797-T, C01-25343, ESE-203401, and through a scholarship to M. O. Guti errez

Controle de ervas daninhas na cultura da pimenta-do-reino na região Transamazônia.

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Wind stress curl and Sverdrup transport in the South Atlantic

Monthly mean values of Hellerman and Rosenstein (HR) wind stress and eight oceanographic transects of the South Atlantic Ocean obtained at different latitudes were used to test the Sverdrup relationship. Seasonal mean wind-stress charts for each season are presented. The zonal migration and splitting of the South Atlantic atmospheric high-pressure centre can be observed, as well as other seasonal changes of the wind field. Charts of the mean wind stress curl show a line of zero curl sloping northeastward across the South Atlantic basin, with negative values north of this line and positive values south of it. The annual mean chart of the Sverdrup mass transport show the same feature, with northward transport below this line and southward transport above it. Zonal values of Sverdrup (S), Geostrophic (G), and Ekman (E) transports, as well as the total transport (R = G + E), were calculated. There is no established relationship between the Sverdrup and total transport with latitude. Within the calculated interval of error (± 1.2 Sv for G and ± 2.3 Sv for S), a good qualitative agreement between R and S was attained at 9°, 11°, 16° and 24° S. The Brazil Current geostrophic transports, at different latitudes, are close to the Sverdrup transport values at the western boundary. However, the poleward increase of the Brazil Current transport with latitude is not presented by the Sverdrup transport.Se utilizaron valores promedios mensuales del esfuerzo del viento de Hellerman y Rosenstein (HR) y ocho secciones oceanográficas distribuidas en el Atlántico sur, a diferentes latitudes, para verificar la relación de Sverdrup. Se muestran mapas medios estacionales del esfuerzo del viento y se observa la migración zonal y la partición del centro atmosférico de alta presión del Atlántico sur, así como otros cambios estacionales del campo del viento. El mapa del rotacional del esfuerzo medio del viento muestra una línea con valor cero extendiéndose desde la costa oeste de áfrica hasta la costa nordeste de Brasil, con valores negativos al norte de esta línea y positivos al sur de la misma. El mapa del promedio anual del transporte de Sverdrup muestra la misma característica, con transportes hacia el Norte por debajo de esa línea y hacia el Sur por encima de ella. Se calculan los valores zonales del transporte de Sverdrup (S), geostrófico (G) y de Ekman (E), así como el transporte total (R = G + E). No se observa una relación establecida entre los transportes de Sverdrup y total y la latitud. Dentro del intervalo de error calculado (± 1,2 Sv para G y ± 2,3 Sv para S), existe una buena concordancia entre R y S en las latitudes 9°, 11°, 16° y 24° S. Los valores del transporte geostrófico de la corriente de Brasil a diferentes latitudes están más cerca de los valores de transporte de Sverdrup en la frontera oeste. El incremento con la latitud del transporte geostrófico de la corriente de Brasil, hacia el Sur, no es observado en el transporte de Sverdrup.Instituto Español de Oceanografí

Perdas de N-N2O e produtividade econômica em arroz tropical irrigado.

O objetivo do presente trabalho foi avaliar os efeitos de fontes e de doses de fertilizantes minerais nitrogenados nas perdas de N via N2O, na eficiência agronômica e na produtividade econômica de arroz irrigado tropical

Modified Silica Nanoparticles from Rice Husk Supported on Polylactic Acid as Adsorptive Membranes for Dye Removal.

Industrial effluents and wastewater treatment have been a mainstay of environmental preservation and remediation for the last decade. Silica nanoparticles (SiO2) obtained from rice husk (RH) are an alternative to producing low-cost adsorbent and agriculture waste recovery. One adsorption challenge is facilitating the adsorbate separation and reuse cycle from aqueous medium. Thus, the present work employs SiO2 supported on polylactic acid (PLA) nanofibers obtained by the electrospinning method for Rhodamine B (RhB) dye adsorption. The silica surface was modified with trimethylsilyl chloride (TMCS) to increase affinity towards organic compounds. As a result, the silanized surface of the silica from rice husk (RHSil) promoted an increase in dye adsorption attributed to the hydrophobic properties. The PLA fibers containing 40% SiO2 (w w−1 ) showed about 85?95% capacity adsorption. The pseudo-first-order kinetic model was demonstrated to be the best model for PLA:SiO2 RHSil nanocomposites, exhibiting a 1.2956 mg g−1 adsorption capacity and 0.01404 min−1 kinetic constant (k1 ) value. In the reuse assay, PLA:SiO2 membranes preserved their adsorption activity after three consecutive adsorption cycles, with a value superior to 60%. Therefore, PLA:SiO2 nanocomposites from agricultural waste are an alternative to ?low-cost/lowend? treatments and can be used in traditional treatment systems to improve dye removal from contaminated waters