Metallic foam processing from the liquid state

Cox, S.J., Bradley, G. and Weaire, D. (2001) Metallic foam processing from the liquid state: the competition between solidification and drainage. Eur. Phys. J. AP 14:87-97. Sponsorship: This research was supported by the Prodex programme of ESA, and is a contribution to ESA contract C14308/AO-075-99. SJC was supported by Enterprise Ireland and a Marie Curie fellowship. GB was supported by the HPC Programme of TCD.

On the structure of quasi-two-dimensional foams

S.J. Cox and E. Janiaud (2008) On the structure of quasi-two-dimensional foams. Phil. Mag. Letts. 88:693-701 Philosophical Magazine Letters Volume 88, Issue 9-10, 2008 Special Issue: Solid and Liquid Foams. In commemoration of Manuel Amaral Fortes The full text will be available 12 months after publication Sponsorship: We thank K. Brakke for his development and maintenance of the Surface Evolver code, I. Cantat, N. Denkov and F. Graner for their insightful comments on this work, and the participants in the Grenoble Foam Mechanics Workshop (2008) for their suggestions. EJ thanks D. Weaire and S. Hutzler for support, and ESA (MAP AO-99-108:C14914/02/NL/SH, MAP AO-99-075:C14308/00/NL/SH) for funding. SJC thanks the British Council Alliance programme, CNRS and EPSRC (EP/D048397/1, EP/D071127/1) for financial support.

Does multiparametric MRI increase Oncologic outcomes in prostate cancer?

The purpose of this study is to compare the 4-year biochemical disease-free survival (BDFS) of patients with prostate cancer (PCa) staged according to multiparametric MRI (mpMRI) and treated with radical prostatectomy (RP) versus intensity-modulated radiation therapy (IMRT) ≥76 Gy ± hormonal therapy (HT).

The effect of 2 weeks vitamin C supplementation on immunoendocrine responses to 2.5 h cycling exercise in man

Davison G, Gleeson M, 2006. The effect of 2 weeks vitamin C supplementation on immunoendocrine responses to 2.5 h cycling exercise in man. European Journal of Applied Physiology 97(4): 454-461 RAE2008

Estructuración de la cadena productiva de tejidos chinchorros y hamacas departamento de la Guajira : informe de actividades y productos.

172 hojas.

Cytokine and antibody profiles in 1-year-old children vaccinated with either acellular or whole-cell pertussis vaccine during infancy.

Two different types of pertussis vaccines are currently available to protect children against whooping cough, the first-generation whole-cell (Pw) vaccines and the more recent acellular (Pa) vaccines. Both types provide good protection, yet induce different types of immune responses in 6-month-old infants, with a strong Th1 response induced by Pw vaccines compared to a mixed Th1/Th2 response and a delay in non-specific IFN-gamma secretions after the administration of Pa vaccines. We show here that at 13 months of age, most Pw- or Pa-vaccinated children display Bordetella pertussis-specific T-cell responses, in addition to significant antibody levels, although a higher Th2/Th1 cytokine ratio remained in Pa recipients compared to Pw recipients. In contrast, the proportion of children with tetanus toxin-specific T-cell responses was lower in Pa than in Pw vaccine recipients, although most children had protective anti-tetanus toxin IgG levels. In addition, the global Th2 bias observed in 6-month-old infants vaccinated with a Pa vaccine was normalized at 13 months.

Integración de la cría bovina en sistemas de agricultura en siembra directa : cómo cambian las propiedades físicas?

El sistema integrado agrícola - ganadero (IAG) enmarcado bajo siembra directa (SD) presentaría ventajas relacionadas a la incorporación de carbono orgánico (CO) al suelo y a la diversificación previniendo diferentes escenarios climáticos y coyunturales. Sin embargo, la presencia del ganado en estos sistemas implica una potencial condición de compactación del suelo durante el pastoreo invernal de residuos de cosecha durante la fase agrícola. Por ello se analizaron los camios de las variables físicas consecuencia del pisoteo del ganado en diferentes escalas de percepción en suelos de la Región Pampeana Norte. A escala regional no se observaron diferencias en el stock de carbono entre el sistema agrícola continuo (AC) bajo SD respecto de los IAG en SD, siendo la resistencia a la penetración (RP) la única variable que permitió diferenciar entre los sistemas hasta los 0.075 m (IAG mayor a AC). El análisis de la dinámica de las variables físicas a escala lote, comparando parcelas pastoreadas (P) y no pastoreadas (NP), permitió observar la ausencia de efectos perjudiciales del pastoreo, siendo las fuerzas de resiliencia del suelo durante ese período superiores a las fuerzas exógenas al mismo. Por otro lado, la presencia de raíces vivas de los cultivos (maíz y soja) contribuyeron positivamente a la estructura del suelo, siendo el efecto de la operación de cosecha la que llevó a procesos de compactación. En particular, el análisis de la densidad aparente (DA) permitió descubrir la existencia de procesos de expansión originadas por la presión de aire entrampado mediante la existencia de poaching o amasado del suelo. A microescala, se evaluaron las curbas de contracción (CC), bajo diferentes manejos, el cuasi - prístino (CP) presentó las mejores características estructurales respecto de los AC e IAG. En el ensayo de simulación de pisada con diferentes contenidos hídricos (CH), se presentó una interacción entre CH y del CO del suelo. Finalmente, se compararon las CC obtenidas de IAG., en parcelas P y NP, de campo y laboratorio, cuyas curvas se separaban en las zonas de saturación hídrica, dando lugar a una fase denominada expansión interpedal. En general, se concluye que los IAG no presentaron un daño estructural que no permita su desarrollo, diversificando los productos ofrecidos y la estabilidad que esto provee.

El número de oro es plano. ¡Pásalo!

El número de oro Φ=1,618... es al plano, lo que el número plástico P=1,2471... es al espacio. Ver esto es el objetivo final de este clip. Pero permitan primero una breve visita a la familia de los números metálicos en la cual destaca con luz propia el áureo.

Ecological And Metabolic Studies On Free-Living Nematodes From An Estuarine Mud-Flat

Nematodes from a mud-flat in the river Lynher estuary, Cornwall, U.K., have a population density ranging between 8 and 9 × 106 m−2 in the winter months, corresponding to a dry weight of 1·4 and 1·6 g m−2. They reach a peak abundance of 22·86 × 106 m−2 (3·4 g) in May. About 40 species are present, and the species composition remained seasonally stable over the period of study. Analysis of age-structure suggests that the major species have continuous asynchronous reproduction. Respiration rates of 16 species have been determined at 20 °C using Cartesian diver respirometry. For five species, respiration/body size regressions were obtained in the form log10R = log10a+b log10V, where R = respiration in nl O2 ind−1 h−1 and V = body volume in nl: Mesotheristus setosus (log10a = −0·04,b = 0·74), Sphaerolaimus hirsutus (log10a = 0·11, b = 0·68), Axonolaimus paraspinosus (log10a = 0·00, b = 0·79), Metachromadora vivipara (log10a = −0·59, b = 1·07), Praeacanthonchus punctatus (log10a = 0·00, b = 0·55). For the remaining 11 species, several animals were used in each diver and, by assuming b = 0·75, log10a′ values were calculated: Viscosia viscosa (log10a′ = 0·188), Innocuonema tentabundum (−0·012), Ptycholaimellus ponticus (−0·081), Odontophora setosa (−0·092), Sphaerolaimus balticus (−0·112), Dichromadora cephalata (−0·133), Atrochromadora microlaima (−0·142), Cylindrotheristus normandicus (−0·150), Terschellingialongicaudata (−0·170), Sabatieria pulchra (−0·197), Terschellingia communis (−0·277). These values are compared with recalculated values for other species from the literature. Annual respiration of the nematode community is 28·01 O2 m−2, equivalent to 11·2 g carbon metabolised. Community respiration is compared with figures from N. American saltmarshes. At 20 °C, a respiration of about 61 O2 m−2 year−1 g−1 wet weight of nematodes appears to be typical. Annual production is estimated to be 6·6 g C m−2. The correlation between feeding-group, body-size, habitat and the repiration rate of individual species is discussed.

Ligand differentiated complementary Rh-catalyst systems for the enantioselective desymmetrization of meso-cyclic anhydrides

Two distinct systems for the rhodium-catalyzed enantioselective desymmetrization of meso-cyclic anhydrides have been developed. Each system has been optimized and are compatible with the use of in situ prepared organozinc reagents. Rhodium/PHOX species efficiently catalyze the addition of alkyl nucleophiles to glutaric anhydrides, while a rhodium/phosphoramidite system is effective in the enantioselective arylation of succinic and glutaric anhydrides.

List 229: Irish and English Dendrochronology

These results cover dating undertaken since the last published list of dated building from Ireland (Brown (2002)); one English church building is also included in the list. Thanks are due to the owners of the buildings and especially to everyone who assisted in taking of the samples: Phil Barrett, Sapphire Mussen, Charles Lyons, Jon Pilcher and Mike Baillie, Amanda Pedlow, Caimin O’Brien and Martin Timoney. Most of the descriptions of the buildings are taken from the National Inventory of Architectural Heritage http://www.buildingofi reland.ie/. The correlation values were generated by CROSS84 (Munro, 1984), which provides a signifi cance level for the date to be correct; *** (extremely signifi cant), ** (very signifi cant), * (signifi cant), nsm (not signifi cant). Estimated felling date ranges are based on the Belfast sapwood estimate of 32 ± 9 years. Date ranges have been calculated by adding and subtracting 9 years from the calculated estimated felling dates. Timbers from the following buildings could not be dated. Cork: St Finbarre’s Cathedral (W 675 715); Dublin: Christchurch Cathedral (O 152 341); Galway: Cloghan Castle (M 972 119); Kilkenny: Rothe House (S 506 563); Offaly: Boveen House (S 075 956); Waterford: Christchurch Cathedral (S 616 121). Generally only single oak samples were recovered from these structures. References: D.Brown, ‘Dendrochronological dating building from Ireland’, VA 33 (2002), 71–3; M. Munro, ‘An improved algorithm for crossdating tree-ring series’, Tree-Ring Bulletin 44 (1984), 17–27.

Regulation of FOS by different compartmental stresses induced by low levels of ionizing radiation

We irradiated different cellular compartments and measured changes in expression of the FOS gene at the mRNA and protein levels. [H-3]Thymidine and tritiated water were used to irradiate the nucleus and the whole cell, respectively. I-125-Concanavalin A binding was used to irradiate the cell membrane differentially. Changes in FOS mRNA and protein levels were measured using semi-quantitative RT-PCR and SDS-PAGE Western blotting, respectively, Irradiation of the nucleus or the whole cell at a dose rate of 0.075 Gy/h caused no change in the level of FOS mRNA expression, but modestly (1.5-fold) induced FOS protein after 0.5 h, Irradiation of the nucleus at a dose rate of 0.43 Gy/h induced FOS mRNA by 1.5-fold after 0.5 h, but there was no significant effect after whole-cell irradiation. FOS protein was transiently induced 2.5-fold above control levels 0.5 h after a 0.43-Gy/h exposure of the nucleus or the whole cell. Irradiation of the cell membrane at a dose rate of 1.8 Gy/h for up to 2 h caused no change in the levels of expression of FOS mRNA or protein, but a dose rate of 6.8 Gy/h transiently increased the level of FOS mRNA S-fold after 0.5 h, These data demonstrate the complexity of the cellular response to radiation-induced damage at low doses. The lack of quantitative agreement between the transcript and protein levels for FOS suggests a role for posttranscriptional regulation. (C) 2000 by Radiation Research Society.

Phosphorus Retention in a Constructed Wetland System used to Treat Dairy Wastewater

The aim of this study was to develop an input/output mass balance to predict phosphorus retention in a five pond constructed wetland system (CWS) at Greenmount Farm, County Antrim, Northern Ireland. The mass balance was created using 14-months of flow data collected at inflow and outflow points on a weekly basis. Balance outputs were correlated with meteorological parameters, such as daily air temperature and hydrological flow, recorded daily onsite. The mass balance showed that phosphorus retention within the system exceeded phosphorus release, illustrating the success of constructed wetland systems to remove nutrients from agricultural effluent from a dairy farm. Pond 5 showed the greatest relative retention of 86%. Comparison of retention and mean air temperature highlighted a striking difference in trends between up-gradient and down-gradient ponds, with Ponds 1 and 2 displaying a positive quadratic relationship and ponds 3 through 5 displaying a negative quadratic relationship.