Evidence for biological shaping of hair ice

An unusual ice type, called hair ice, grows on the surface of dead wood of broad-leaf trees at temperatures slightly below 0 °C. We describe this phenomenon and present physical, chemical, and biological investigations to gain insight in the properties and processes related to hair ice. Tests revealed that the biological activity of a winter-active fungus is required in the wood for enabling the growth of hair ice. We confirmed the fungus hypothesis originally suggested by Wegener (1918) by reproducing hair ice on wood samples. Treatment by heat and fungicide suppresses the formation of hair ice. Fruiting bodies of Asco- and Basidiomycota are identified on hair-ice-carrying wood. One species, Exidiopsis effusa (Ee), was present on all investigated samples. Both hair-ice-producing wood samples and those with killed fungus show essentially the same temperature variation, indicating that the heat produced by fungal metabolism is very small, that the freezing rate is not influenced by the fungus activity, and that ice segregation is the common mechanism of ice growth on the wood surface. The fungus plays the role of shaping the ice hairs and preventing them from recrystallisation. Melted hair ice indicates the presence of organic matter. Chemical analyses show a complex mixture of several thousand CHO(N,S) compounds similar to fulvic acids in dissolved organic matter (DOM). The evaluation reveals decomposed lignin as being the main constituent. Further work is needed to clarify its role in hair-ice growth and to identify the recrystallisation inhibitor.

Palynology and radiocarbon dating on sediment profile PG1756 from Lake Billyakh, NE Siberia, Russia

In this study a radiocarbon-dated pollen record from Lake Billyakh (65°17'N, 126°47'E; 340 m a.s.l.) in the Verkhoyansk Mountains was used to reconstruct vegetation and climate change since about 15 kyr BP (1 kyr=1000 cal. yr). The pollen record and pollen-based biome reconstruction suggest that open cool steppe and grass and sedge tundra communities with Poaceae, Cyperaceae, Artemisia, Chenopodiaceae, Caryophyllaceae and Selaginella rupestris dominated the area from 15 to 13.5 kyr BP. On the other hand, the constant presence of Larix pollen in quantities comparable to today's values points to the constant presence of boreal deciduous conifer trees in the regional vegetation during the last glaciation. A major spread of shrub tundra communities, including birch (Betula sect. Nanae), alder (Duschekia fruticosa) and willow (Salix) species, is dated to 13.5-12.7 kyr BP, indicating a noticeable increase in precipitation toward the end of the last glaciation, particularly during the Allerød Interstadial. Between 12.7 and 11.4 kyr BP pollen percentages of herbaceous taxa rapidly increased, whereas shrub taxa percentages decreased, suggesting strengthening of the steppe communities associated with the relatively cold and dry Younger Dryas Stadial. However, the pollen data in hand indicate that Younger Dryas climate was less severe than the climate during the earlier interval from 15 to 13.5 kyr BP. The onset of the Holocene is marked in the pollen record by the highest values of shrub and lowest values of herbaceous taxa, suggesting a return of warmer and wetter conditions after 11.4 kyr BP. Percentages of tree taxa increase gradually and reach maximum values after 7 kyr BP, reflecting the spread of boreal cold deciduous and taiga forests in the region. An interval between 7 and 2 kyr BP is noticeable for the highest percentages of Scots spine (Pinus subgen. Diploxylon), spruce (Picea) and fir (Abies) pollen, indicating mid-Holocene spread of boreal forest communities in response to climate amelioration and degradation of the permafrost layer.

De Las Vegas a Marina D'or. O como llegar desde el New Jornalism norteamericano de Hunter S. Thompson hasta la nueva narrativa española de Robert Juan-Cantavella

La corriente norteamericana llamada 'Nuevo periodismo', nacida en los años sesenta, supuso para la Periodística tradicional de Estados Unidos toda una revolución por la combinación de elementos literarios con otros propios de la investigación periodística. Hunter S. Thompson, autor de Miedo y asco en las Vegas (1971), con su periodismo gonzo, le iba a dar una vuelta más a la propuesta del New Journalism, llevando al extremo el proceso de inmersión, hasta implicarse personalmente en sus reportajes y acogiendo sobre todo influencias narrativas del movimiento Beat de los cincuenta. Casi 35 años después, en El Dorado, Juan-Cantavella hace un paralelismo entre Las Vegas y la ciudad de vacaciones en la costa mediterránea española, Marina D'Or y desarrolla en este ámbito una novela, protagonizada por su alter ego el periodista punk, Escargot. Novela, periodismo, gonzo, ficción, cuento, punk, ensayo, reportaje, 'aportaje', fragmentación discursiva, diálogos, monólogos interiores, descripciones, comunicados, telegramas, emails, notas de prensa, noticias radiofónicas, canciones, eslóganes, todo cabe para recrear géneros, para releer tradiciones periodísticas y literarias, y llegar a construir algo nuevo. Este trabajo analiza este proceso que va desde el periodismo gonzo, de Miedo y asco en Las Vegas a la narrativa española actual de El Dorado. Se ocupa de discernir los recursos literarios de que se sirve el periodista gonzo para construir sus reportajes y las herramientas periodísticas que nutren la 'narrativa punk' de Juan-Cantavella. Un ejemplo singular de simbiosis periodístico-literaria

De Las Vegas a Marina D'or. O como llegar desde el New Jornalism norteamericano de Hunter S. Thompson hasta la nueva narrativa española de Robert Juan-Cantavella

La corriente norteamericana llamada 'Nuevo periodismo', nacida en los años sesenta, supuso para la Periodística tradicional de Estados Unidos toda una revolución por la combinación de elementos literarios con otros propios de la investigación periodística. Hunter S. Thompson, autor de Miedo y asco en las Vegas (1971), con su periodismo gonzo, le iba a dar una vuelta más a la propuesta del New Journalism, llevando al extremo el proceso de inmersión, hasta implicarse personalmente en sus reportajes y acogiendo sobre todo influencias narrativas del movimiento Beat de los cincuenta. Casi 35 años después, en El Dorado, Juan-Cantavella hace un paralelismo entre Las Vegas y la ciudad de vacaciones en la costa mediterránea española, Marina D'Or y desarrolla en este ámbito una novela, protagonizada por su alter ego el periodista punk, Escargot. Novela, periodismo, gonzo, ficción, cuento, punk, ensayo, reportaje, 'aportaje', fragmentación discursiva, diálogos, monólogos interiores, descripciones, comunicados, telegramas, emails, notas de prensa, noticias radiofónicas, canciones, eslóganes, todo cabe para recrear géneros, para releer tradiciones periodísticas y literarias, y llegar a construir algo nuevo. Este trabajo analiza este proceso que va desde el periodismo gonzo, de Miedo y asco en Las Vegas a la narrativa española actual de El Dorado. Se ocupa de discernir los recursos literarios de que se sirve el periodista gonzo para construir sus reportajes y las herramientas periodísticas que nutren la 'narrativa punk' de Juan-Cantavella. Un ejemplo singular de simbiosis periodístico-literaria

De Las Vegas a Marina D'or. O como llegar desde el New Jornalism norteamericano de Hunter S. Thompson hasta la nueva narrativa española de Robert Juan-Cantavella

La corriente norteamericana llamada 'Nuevo periodismo', nacida en los años sesenta, supuso para la Periodística tradicional de Estados Unidos toda una revolución por la combinación de elementos literarios con otros propios de la investigación periodística. Hunter S. Thompson, autor de Miedo y asco en las Vegas (1971), con su periodismo gonzo, le iba a dar una vuelta más a la propuesta del New Journalism, llevando al extremo el proceso de inmersión, hasta implicarse personalmente en sus reportajes y acogiendo sobre todo influencias narrativas del movimiento Beat de los cincuenta. Casi 35 años después, en El Dorado, Juan-Cantavella hace un paralelismo entre Las Vegas y la ciudad de vacaciones en la costa mediterránea española, Marina D'Or y desarrolla en este ámbito una novela, protagonizada por su alter ego el periodista punk, Escargot. Novela, periodismo, gonzo, ficción, cuento, punk, ensayo, reportaje, 'aportaje', fragmentación discursiva, diálogos, monólogos interiores, descripciones, comunicados, telegramas, emails, notas de prensa, noticias radiofónicas, canciones, eslóganes, todo cabe para recrear géneros, para releer tradiciones periodísticas y literarias, y llegar a construir algo nuevo. Este trabajo analiza este proceso que va desde el periodismo gonzo, de Miedo y asco en Las Vegas a la narrativa española actual de El Dorado. Se ocupa de discernir los recursos literarios de que se sirve el periodista gonzo para construir sus reportajes y las herramientas periodísticas que nutren la 'narrativa punk' de Juan-Cantavella. Un ejemplo singular de simbiosis periodístico-literaria

Results of n-alkane biomarker analyses and paleoclimate reconstruction

The current study presents quantitative reconstructions of tree cover, annual precipitation and mean July temperature derived from the pollen record from Lake Billyakh (65°17'N, 126°47'E, 340 m above sea level) spanning the last ca. 50 kyr. The reconstruction of tree cover suggests presence of woody plants through the entire analyzed time interval, although trees played only a minor role in the vegetation around Lake Billyakh prior to 14 kyr BP (<5%). This result corroborates low percentages of tree pollen and low scores of the cold deciduous forest biome in the PG1755 record from Lake Billyakh. The reconstructed values of the mean temperature of the warmest month ~8-10 °C do not support larch forest or woodland around Lake Billyakh during the coldest phase of the last glacial between ~32 and ~15 kyr BP. However, modern cases from northern Siberia, ca. 750 km north of Lake Billyakh, demonstrate that individual larch plants can grow within shrub and grass tundra landscape in very low mean July temperatures of about 8 °C. This makes plausible our hypothesis that the western and southern foreland of the Verkhoyansk Mountains could provide enough moist and warm microhabitats and allow individual larch specimens to survive climatic extremes of the last glacial. Reconstructed mean values of precipitation are about 270 mm/yr during the last glacial interval. This value is almost 100 mm higher than modern averages reported for the extreme-continental north-eastern Siberia east of Lake Billyakh, where larch-dominated cold deciduous forest grows at present. This suggests that last glacial environments around Lake Billyakh were never too dry for larch to grow and that the summer warmth was the main factor, which limited tree growth during the last glacial interval. The n-alkane analysis of the Siberian plants presented in this study demonstrates rather complex alkane distribution patterns, which challenge the interpretation of the fossil records. In particular, extremely low n-alkane concentrations in the leaves of local coniferous trees and shrubs suggest that their contribution to the litter and therefore to the fossil lake sediments might be not high enough for tracing the Quaternary history of the needleleaved taxa using the n-alkane biomarker method.

On-line breath analysis of volatile organic compounds as a method for colorectal cancer detection

Background: Analysis of exhaled volatile organic compounds (VOCs) in breath is an emerging approach for cancer diagnosis, but little is known about its potential use as a biomarker for colorectal cancer (CRC). We investigated whether a combination of VOCs could distinct CRC patients from healthy volunteers. Methods: In a pilot study, we prospectively analyzed breath exhalations of 38 CRC patient and 43 healthy controls all scheduled for colonoscopy, older than 50 in the average-risk category. The samples were ionized and analyzed using a Secondary ElectroSpray Ionization (SESI) coupled with a Time-of-Flight Mass Spectrometer (SESI-MS). After a minimum of 2 hours fasting, volunteers deeply exhaled into the system. Each test requires three soft exhalations and takes less than ten minutes. No breath condensate or collection are required and VOCs masses are detected in real time, also allowing for a spirometric profile to be analyzed along with the VOCs. A new sampling system precludes ambient air from entering the system, so background contamination is reduced by an overall factor of ten. Potential confounding variables from the patient or the environment that could interfere with results were analyzed. Results: 255 VOCs, with masses ranging from 30 to 431 Dalton have been identified in the exhaled breath. Using a classification technique based on the ROC curve for each VOC, a set of 9 biomarkers discriminating the presence of CRC from healthy volunteers was obtained, showing an average recognition rate of 81.94%, a sensitivity of 87.04% and specificity of 76.85%. Conclusions: A combination of cualitative and cuantitative analysis of VOCs in the exhaled breath could be a powerful diagnostic tool for average-risk CRC population. These results should be taken with precaution, as many endogenous or exogenous contaminants could interfere as confounding variables. On-line analysis with SESI-MS is less time-consuming and doesn’t need sample preparation. We are recruiting in a new pilot study including breath cleaning procedures and spirometric analysis incorporated into the postprocessing algorithms, to better control for confounding variables.

Emociones y cine en alumnado con necesidades específicas de apoyo educativo

A través del siguiente trabajo se pretende explicar a los alumnos con necesidades específicas de apoyo educativo a expresar y comprender sus emociones. A partir de la película de Inside Out, se realizarán una serie de actividades de una manera lúdica y motivadora para el alumnado. No sólo se trabajara con la película, sino que se utilizarán todos los recursos de los cuales se dispone en el aula de Pedagogía Terapéutica, en este caso desde un centro de Educación Especial. Se utilizará una metodología activa, individualizada, integral y motivadora. Con las actividades planteadas se ha intentado que el alumno pueda comprender e interiorizar de una manera lúdica las cinco emociones básicas.

The 3 per cent Barcelona Target: A Critical Appraisal of the Failure of the Lisbon Strategy’s Knowledgebased Economy and Society Project

Ten years after the unanimous approval of the Lisbon Strategy at a special meeting of the European Council on 23-24 March 2000 in Lisbon, it will be inevitable for the European Council, the European Commission and the majority of the EU member states to face with its fi asco and to account for the reasons of their fundamental policy, governance and economic failures in 2010. The recent turbulence of the global economy offers some excuses for the underperformance of the main objectives of the Lisbon Strategy in the essential social and economic domains, like job creation, economic growth, and environmental sustainability. Negative growth rates, macroeconomic and fi nancial instability, the contraction of the internal and external markets of the European economy, drop in demand for capital investment, goods and services, sinking corporate revenues, depreciation of corporate assets, increasing private and public indebtedness, falling rate of employment, weakening social cohesion, widening social inequality, and so forth not only deprive the majority of the EU member states of fulfi lling the main objectives of the Lisbon Strategy but also drive them into worse social and economic conditions in many policy domains than they were in 2000.