Geology and Land-use related pattern of spring water quality : ase study from the catchments of the Malopolska Upland (S. Poland)

Spring water chemical composition was investigated in three catchments (i.e. Pradnik, Dlubnia and Szreniawa) located within a carbonate-rock monocline from the Upper Jurassic and Cretaceous periods and constituting voluminous aquifers. The total spring water dissolved solids (TDS) displayed a concentration increase between 1974 and 1999. Using principal component analysis (PCA), the authors identified factors determining spring water chemistry. The research focused on making a distinction between the regional (large-area) and the local factors, the latter being related to the land-use in the direct vicinity of the springs. PCA yielded evidence that local sources of pollution can significantly contribute to the differentiation of spring-water chemical composition

Concepto de Rta en el Rg Veda.

Sin resume

High Pressure X-Ray Diffraction Study of UMn2Ge2

Uranium manganese germanide, UMn2Ge2, crystallizes in body-centered tetragonal ThCr2Si2 structure with space group I4/mmm, a = 3.993A and c = 10.809A under ambient conditions. Energy dispersive X-ray diffraction was used to study the compression behaviour of UMn2Ge2 in a diamond anvil cell. The sample was studied up to static pressure of 26 GPa and a reversible structural phase transition was observed at a pressure of ~ 16.1 GPa. Unit cell parameters were determined up to 12.4 GPa and the calculated cell volumes were found to be well reproduced by a Murnaghan equation of state with K0 = 73.5 GPa and K' = 11.4. The structure of the high pressure phase above 16.0 GPa is quite complicated with very broad lines and could not be unambiguously determined with the available instrument resolution

Applications of Cs-137 and soil trapping methods for studying slope processes in the Carpathian foothills

Areas of soil degradation and sedimentation have been delimited within a single, representative for the Carpathian Foothills, slope profile. Two methods: Cs-137 and soil trapping have been used. Soil degradation on the slope used as a pastureland is generally small, with the most intensive degradation in the mid slope. Once the slope was cultivated the process of erosion and soil wash must have been more intensive which is evidenced by high Cs-137 content within the valley bottom deposits. High Cs-137 content within forested ecosystems results from good Cs-137 trapping efficiency of forests rather than from the soil deposition.[es] Aplicación del Cs-137 y de métodos de trampeo de suelo para estudiar procesos de ladera en el piedemonte de los Cárpatos. Se han delimitado las áreas afectadas por erosión y sedimentación en un perfil de ladera, representativo del piedemonte de los Cárpatos. Se han empleado dos métodos: Cesio-137 y trampas de sedimentos. Se ha demostrado que la erosión del suelo en laderas utilizadas para pastos es generalmente pequeña, apareciendo las degradaciones más intensas a media ladera. Cuando la ladera estaba cultivada, los procesos de erosión debían ser más intensos, como lo evidencia el alto contenido de Cs-137 en los depósitos de fondo de valle. El elevado contenido de Cs-137 en ecosistemas forestales se debe a la eficacia de los bosques para atrapar el Cs-137, más que a la sedimentación. [de] Anwendung der Cs-137 und der Fangmethode zur bestimmung der Hangvorgänge im Karpatenhügelland. Entlang eines Hangprofíls innerhalb des Karpatenhügellandes sind Stellen ermitteit worden an denen, entweder Erosion oder Deposition festgestellt wurden. Das wurde aufgrund zweier fvlethoden bestimmt: anhand des radioaktiven Cs-137 und der Menge des erodierten Materials in eigens für diesen Zweck hergestellten Auffangbehältern. Es wurde festgestellt, dass aufeinem ais Weide genutzten Han die Intensität der Erosion generellin selnem mittieren Teilam grössten ist Ais aber der untersuchte Weidehang ais Ackerland genutzt wurde, war die Intensität der Erosion und Abspülung annehmbar bedeutend grosser, worauf die beraächtiiche Menge des Cs-137 In den Ablagerungen des Talbodens zeugt Grosser Anteil des Cs-137 im Waldekosystem deutetaufeine erhebliche Aufnahmefähigkeitdes Waldes der radioaktiven Niederschlage. Dieser Anteil resultiert nicht aus der Akkumulation des erodierten Materials

Análisis de preferencias turísticas: un enfoque innovador

Most of the decisions concerning tourism are made in a context of uncertainty, and on several occasions the consequences of the choice are not known with certainty, or even there is missing information on this matter. For these reasons, the fuzzy set theory is an appropriate tool for their treatments.In this paper we show, through a case study, an alternative model for the analysis of tourist preferences of a segment of individuals based on the concept of fuzzy consideration set.La mayor parte de las decisiones referidas a turismo se toman en un contexto de incertidumbre, y en muchas oportunidades no se conocen con certeza las consecuencias de la elección, ni se posee toda la información. Por estas razones la teoría de conjuntos borrosos resulta una herramienta apropiada para su tratamiento.En este trabajo se presenta, a través del estudio de un caso, un modelo alternativo para el análisis de las preferencias turísticas, de un segmento de individuos, basado en el concepto de conjunto de consideración borroso

MOF-associated complexes ensure stem cell identity and Xist repression

Histone acetyl transferases (HATs) play distinct roles in many cellular processes and are frequently misregulated in cancers. Here, we study the regulatory potential of MYST1-(MOF)-containing MSL and NSL complexes in mouse embryonic stem cells (ESCs) and neuronal progenitors. We find that both complexes influence transcription by targeting promoters and TSS-distal enhancers. In contrast to flies, the MSL complex is not exclusively enriched on the X chromosome, yet it is crucial for mammalian X chromosome regulation as it specifically regulates Tsix, the major repressor of Xist lncRNA. MSL depletion leads to decreased Tsix expression, reduced REX1 recruitment, and consequently, enhanced accumulation of Xist and variable numbers of inactivated X chromosomes during early differentiation. The NSL complex provides additional, Tsix-independent repression of Xist by maintaining pluripotency. MSL and NSL complexes therefore act synergistically by using distinct pathways to ensure a fail-safe mechanism for the repression of X inactivation in ESCs