Ciencias básicas
Colecciones en esta comunidad
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Biología [171]
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Física [17]
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Geología [19]
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Matemática [14]
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Meteorología [133]
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Química [43]
Envíos recientes
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Selvamicin, an atypical antifungal polyene from two alternative genomic contexts
(2016-11-15)The bacteria harbored by fungus-growing ants produce a variety of small molecules that help maintain a complex multilateral symbiosis. In a survey of antifungal compounds from these bacteria, we discovered selvamicin, an ... -
Deletion of amelotin exons 3–6 is associated with amelogenesis imperfecta
(2016-07-12)Amelogenesis imperfecta (AI) is a heterogeneous group of genetic conditions that result in defective dental enamel formation. Amelotin (AMTN) is a secreted protein thought to act as a promoter of matrix mineralization in ... -
In favor of establishment: chromatid cohesion in plants
(2017-05-23)In eukaryotic organisms, the correct regulation of sister chromatid cohesion, whereby sister chromatids are paired and held together, is essential for accurate segregation of the sister chromatids and homologous chromosomes ... -
Descripción de experiencias para el mejoramiento de la enseñanza de las ciencias
(1989-09-07)El documento incluye dos trabajos. En el primero se exponen las acciones de educación no formal en la enseñanza de las ciencias que han beneficiado a docentes de niveles pre-universitarios del Sistema Educativo Nacional ... -
The utility of daily large-scale climate data in the assessment of climate change impacts on daily streamflow in California
(2010-06-30)Three statistical downscaling methods were applied to NCEP/NCAR reanalysis (used as a surrogate for the best possible general circulation model), and the downscaled meteorology was used to drive a hydrologic model over ... -
Southern California and the perfect drought: Simultaneous prolonged drought in southern California and the Sacramento and Colorado River systems
(2008-09-01)Southern California relies heavily upon imported water from the Sacramento and Colorado river systems to augment local supplies and to mitigate the impacts of drought. In this paper a ‘perfect drought’ is defined as a ... -
Recent Eurasian river discharge to the Arctic Ocean in the context of longer-term dendrohydrological records
(2007-12-29)Mapped correlations between annual discharges (AD 1938–1990) of the major Eurasian rivers entering the Arctic Ocean (Severnaya Dvina, Pechora, Ob', Yenisey, Lena, and Kolyma) demonstrate a positive relationship between ... -
Projections of Potential Flood Regime Changes in California
(2009-03)Floods have been a recurring theme in California’s climatology, hydrology, and politics throughout its history. Today, California's aging water supply and flood protection infrastructures are challenged by major floods ... -
Sources of Variability of Evapotranspiration in California
(2005-02)The variability (1990–2002) of potential evapotranspiration estimates (ETo) and related meteorological variables from a set of stations from the California Irrigation Management System (CIMIS) is studied. Data from the ... -
Warming and Earlier Spring Increase Western U.S. Forest Wildfire Activity
(2006-08-18)Western United States forest wildfire activity is widely thought to have increased in recent decades, yet neither the extent of recent changes nor the degree to which climate may be driving regional changes in wildfire has ... -
Detection and Attribution of Temperature Changes in the Mountainous Western United States
(2008-04-22)Large changes in the hydrology of the western United States have been observed since the mid-twentieth century. These include a reduction in the amount of precipitation arriving as snow, a decline in snowpack at low and ... -
Associations of multi-decadal sea-surface temperature variability with US drought
(2008-09)Recent research suggests a link between drought occurrence in the conterminous United States (US) and sea surface temperature (SST) variability in both the tropical Pacific and North Atlantic Oceans on decadal to multidecadal ... -
Associations of decadal to multidecadal sea-surface temperature variability with Upper Colorado River flow
(2007-02)The relations of decadal to multidecadal (D2M) variability in global sea-surface temperatures (SSTs) with D2M variability in the flow of the Upper Colorado River Basin (UCRB) are examined for the years 1906- 2003. Results ... -
Human-Induced Changes in the Hydrology of the Western United States
(2008-02-22)Observations have shown that the hydrological cycle of the western United States changed significantly over the last half of the 20th century. We present a regional, multivariable climate change detection and attribution ... -
Attribution of Declining Western U.S. Snowpack to Human Effects
(2008-12-01)Observations show snowpack has declined across much of the western United States over the period 1950–99. This reduction has important social and economic implications, as water retained in the snowpack from winter storms ... -
Climate change scenarios and sea level rise estimates for California 2008 Climate Change Scenarios Assessment
(2009-03)For the 2008 California Climate Change Assessment, to further investigate possible future climate changes in California, a set of 12 climate change model simulations was selected and evaluated. From the Intergovernmental ... -
Climate Change, Growth, and California Wildfire
(2009-03)Large wildfire occurrence and burned area are modeled using hydroclimate and landsurface characteristics under a range of future climate and development scenarios. The range of uncertainty for future wildfire regimes is ...
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