搜索结果: 1-15 共查到“理学 limitation”相关记录52条 . 查询时间(0.056 秒)
COUPLED SPIN AND SHAPE EVOLUTION OF SMALL RUBBLE-PILE ASTEROIDS:SELF-LIMITATION OF THE YORP EFFECT
methods numerical–minor planets,asteroids general
2015/12/25
We present the first self-consistent simulations of the coupled spin-shape evolution of small gravitational aggregates under the influence of the YORP effect. Because of YORP's sensitivity to surface ...
Reca Dynamics & the SOS Response in Escherichia Coli: Cellular Limitation of Inducing Filaments
DNA damage RadA RecA SOS response
2015/1/28
During the course of normal DNA replication, replication forks are constantly encountering "housekeeping" types of routine damage to the DNA template that may cause the forks to stall or collapse. One...
Site Characteristics and Plant Invasion: Light Limitation of Invasive Establishment and Impacts of Elaeagnus Umbellata on Soil Nitrogen Availability and Co-occurring Species
soil nitrogen invasion facilitation
2015/1/6
Invasive species have become an increasing threat to many habitats worldwide. This research addressed the questions of whether several invasive woody plants can germinate, survive and grow in light le...
Homeostasis and nutrient limitation of benthic autotrophs in natural chemostats
natural chemostats benthic autotrophs
2014/11/28
To explore how gradients in nutrient availability influence the stoichiometry of freshwater autotrophs, we
sampled algal and submerged vascular plant tissues, as well as water for C : N : P ratios in...
Spring phytoplankton communities shaped by interannual weather variability and dispersal limitation: Mechanisms of climate change effects on key coastal primary producers
Spring phytoplankton communities shaped interannual weather variability dispersal limitation Mechanisms of climate change effects key coastal primary producers
2014/4/2
Spring bloom composition in the Baltic Sea, a partially ice-covered brackish coastal waterbody, is shaped by winter–spring weather conditions affecting the relative dominance of diatoms and a heteroge...
Arsenic and phosphorus biogeochemistry in the ocean: Arsenic species as proxies for P-limitation
Arsenic and phosphorus biogeochemistry the ocean: Arsenic species proxies for P-limitation
2014/4/2
Arsenic and phosphorus are biochemically very similar, and hence arsenate (As5+) is toxic by interfering with the energy metabolism, in particular during P limitation. However, many phytoplankton deto...
Fluxes of dissolved aluminum and manganese to the Weddell Sea and indications for manganese co-limitation
Fluxes dissolved aluminum manganese to the Weddell Sea indications manganese co-limitation
2014/4/2
The trace metals aluminum (Al) and manganese (Mn) were studied in the Weddell Sea in March 2008.Concentrations of dissolved Al ([Al]) were slightly elevated (0.23–0.35 nmol L21) in the surface layer c...
Nickel limitation of nitrogen fixation inTrichodesmium
Nickel limitation nitrogen fixation Trichodesmium
2014/4/2
I show that the growth ofTrichodesmium, the primary diazotrophic phytoplankton in tropical and subtropical oceans, can be limited by Ni availability in both trace metal–defined culture media and natur...
Increased cellular brevetoxins in the red tide dinoflagellate Karenia brevis under CO2 limitation of growth rate: Evolutionary implications and potential effects on bloom toxicity
Increased cellular brevetoxins Karenia brevis
2014/4/2
Karenia brevis blooms impair human health, marine ecosystems, and coastal economies in the Gulf of Mexico
via their production of carbon-based neurotoxins (brevetoxins), which contain no nitrogen (N)...
Temperature- and cholesterol-induced changes in eicosapentaenoic acid limitation of Daphnia magnadetermined by a promising method to estimate growth saturation thresholds
Temperature cholesterol-induced changes in eicosapentaenoic acid limitation Daphnia magnadetermined a promising method estimate growth saturation thresholds
2014/4/8
We present data on eicosapentaenoic acid (EPA)-limited growth responses ofDaphnia magnaunder different temperatures and different dietary cholesterol availabilities to assess how EPA growth saturation...
Responses to iron limitation in two colonies of Stylophora pistillata exposed to high temperature: Implications for coral bleaching
Stylophora pistillata Responses coral bleaching
2014/4/8
Exposing the coral Stylophora pistillata to seawater depleted in available iron by complexation with the strong
chelator desferrioxamine B reduces the photosynthetic efficiency and alters the pigment...
Phosphatases relieve carbon limitation of microbial activity in Baltic Sea sediments along a redox-gradient
carbon limitation Baltic Sea sediments
2014/4/4
The relationship between phosphatase activity and the element limiting microbial activity (carbon [C], nitrogen
[N], or phosphorus [P]) was studied experimentally in sediment from four stations in th...
Effects of seasonality and resource limitation on organic matter turnover by Chironomidae (Diptera) in southern Appalachian headwater streams
seasonality resource limitation Chironomidae in southern Appalachian headwater streams
2014/4/17
Despite their high abundance, secondary production, and known reliance on detrital material, the role of chironomids (Diptera) in fine particulate organic matter (FPOM) dynamics has not been well quan...
How anthropogenic darkening of Lake Apopka induced benthic light limitation and forced the shift from macrophyte to phytoplankton dominance
Lake Apopka induced benthic light limitation forced the shift macrophyte to phytoplankton dominance
2014/4/17
Controversy exists about the historic shift of primary producer community structure (PPCS) in Lake Apopka,a shallow, 125-km2lake in central Florida, U.S.A. The controversial questions are: was a lake-...
Molybdenum–nitrogen co-limitation in freshwater and coastal heterocystouscyanobacteria
coastal heterocystous cyanobacteria
2014/4/16
Molybdenum (Mo) is essential for the biological assimilation of inorganic nitrogen (N). We compared Mo
requirements for N2
-fixation in two species of filamentous heterocystous cyanobacteria (HC) to...