978 resultados para Davis, J. D. (Jerome Dean), 1838-1910


Relevância:

100.00% 100.00%

Publicador:

Resumo:

Climate is an important control on biomass burning, but the sensitivity of fire to changes in temperature and moisture balance has not been quantified. We analyze sedimentary charcoal records to show that the changes in fire regime over the past 21,000 yrs are predictable from changes in regional climates. Analyses of paleo- fire data show that fire increases monotonically with changes in temperature and peaks at intermediate moisture levels, and that temperature is quantitatively the most important driver of changes in biomass burning over the past 21,000 yrs. Given that a similar relationship between climate drivers and fire emerges from analyses of the interannual variability in biomass burning shown by remote-sensing observations of month-by-month burnt area between 1996 and 2008, our results signal a serious cause for concern in the face of continuing global warming.

Relevância:

100.00% 100.00%

Publicador:

Resumo:

von S.

Relevância:

100.00% 100.00%

Publicador:

Resumo:

Mathias Bersohn. Dzielo posmiertne, wydane staraniem rodziny

Relevância:

100.00% 100.00%

Publicador:

Relevância:

100.00% 100.00%

Publicador:

Resumo:

[von] E. Morpurgo

Relevância:

100.00% 100.00%

Publicador:

Resumo:

von R. Straus

Relevância:

100.00% 100.00%

Publicador:

Resumo:

von A. Berliner

Relevância:

100.00% 100.00%

Publicador:

Resumo:

The purpose of this study was to evaluate various herbicides for corn injury and weed control when applied preemergence and postemergence.

Relevância:

100.00% 100.00%

Publicador:

Resumo:

The purpose of this study was to evaluate various herbicides for corn injury and weed control when applied preemergence and postemergence.

Relevância:

100.00% 100.00%

Publicador:

Resumo:

The purpose of this study was to evaluate various herbicides and application timings in soybean for crop injury and weed control.

Relevância:

100.00% 100.00%

Publicador:

Resumo:

Interannual-decadal variability in the equatorial Pacific El Niño-Southern Oscillation (ENSO) induces climate changes at global scale, but its potential influence during past global climate change is not yet well constrained. New high-resolution eastern equatorial Pacific proxy records of thermocline conditions present new evidence of strong orbital control in ENSO-like variability over the last 275,000 years. Recurrent intervals of saltier thermocline waters are associated with the dominance of La Niña-like conditions during glacial terminations, coinciding with periods of low precession and high obliquity. The parallel dominance of d13C-depleted waters supports the advection of Antarctic origin waters toward the tropical thermocline. This "oceanic tunneling" is proposed to have reinforced orbitally induced changes in ENSO-like variability, composing a complex high- and low-latitude feedback during glacial terminations.

Relevância:

100.00% 100.00%

Publicador:

Resumo:

Casein kinase 1 protein kinases are ubiquitous and abundant Ser/Thr-specific protein kinases with activity on acidic substrates. In yeast, the products of the redundant YCK1 and YCK2 genes are together essential for cell viability. Mutants deficient for these proteins display defects in cellular morphogenesis, cytokinesis, and endocytosis. Yck1p and Yck2p are peripheral plasma membrane proteins, and we report here that the localization of Yck2p within the membrane is dynamic through the cell cycle. Using a functional green fluorescent protein (GFP) fusion, we have observed that Yck2p is concentrated at sites of polarized growth during bud morphogenesis. At cytokinesis, GFP–Yck2p becomes associated with a ring at the bud neck and then appears as a patch of fluorescence, apparently coincident with the dividing membranes. The bud neck association of Yck2p at cytokinesis does not require an intact septin ring, and septin assembly is altered in a Yck-deficient mutant. The sites of GFP–Yck2p concentration and the defects observed for Yck-deficient cells together suggest that Yck plays distinct roles in morphogenesis and cytokinesis that are effected by differential localization.

Relevância:

100.00% 100.00%

Publicador:

Resumo:

Federal Highway Administration, Washington, D.C.

Relevância:

100.00% 100.00%

Publicador:

Resumo:

The author's work "The University library of Edinburgh, with a short notice of its rarer treasures," was pub. in 1904.