Results 71 to 80 of about 1,438,024 (273)
Intra‐Plant Nitrogen Isotope Fractionation in Maize
Journal of Plant Nutrition and Soil Science, EarlyView.ABSTRACT Background and aim The natural abundance of nitrogen isotopes (δ15N) provides a powerful integrative tracer of nitrogen uptake and assimilation in plants, yet the internal partitioning of δ15N among plant tissues remains insufficiently understood.
Priscillia Semaoune +4 more
wiley +1 more source
Topographic and Climatic Determinants of Soil Organic Carbon Across Landscapes: A Meta‐Analysis
Land Degradation &Development, EarlyView.ABSTRACT The soil is the greatest natural store of organic carbon, holding between 1500 to 1550 Pg C of organic carbon at the top 100 cm of the soil globally—roughly twice the carbon pool in the atmosphere. The spatial distribution of this stock is controlled by a complex chain of controls: topographic position regulates the hydrological redistribution,
Vishal Sharma +8 more
wiley +1 more source
Paul İyon Tuzağında Tek İyon Dinamiği
Süleyman Demirel Üniversitesi Fen-Edebiyat Fakültesi Fen Dergisi, 2015 Özet: Bu çalışmada, iyonları elektrostatik tuzaklamaya dayalı Paul tuzağı içindeki iyon dinamikleri incelenmiştir. Paul tuzağı DC ve AC gerilim kombinasyonu ile kuadrupol elektrotların beslenmesi temeline dayanmaktadır.
Hüsnü AKSAKAL, Serkan AVCI
doaj
Oikos, EarlyView.Ecosystem engineers are crucial to the development of coastal ecosystem communities and functions. However, a better understanding of how environmental stressors affect ecosystem engineering and thereby influence communities and ecosystem dynamics is needed. We conducted an in situ experiment in a blue mussel Mytilus spp.
Félix Lauzon +5 more
wiley +1 more source
Wall stabilization and the Mathieu–Hill equations
Physics of Plasmas, 2002 In a recent publication [H. Tasso and G. N. Throumoulopoulos, Phys. Lett. A 271, 413 (2000)] on Lyapunov stability of general mechanical systems, it is shown that “parametric excitations” can be stabilized by dissipation for positive potential energies. Specializing on the damped Mathieu equation permits one to establish its full stability chart. It is
Tasso, H., Throumoulopoulos, G.
openaire +3 more sources
Modification of the Stability Regions in Stretched Paul Ion Trap by Damping Force [PDF]
مجله علوم و فنون هستهای, 2017 With the change of an ion trap geometrical shape, ring and end-cap electrodes, and also damping force effects, the first and second stability regions are studied in a stretched Paul ion trap.
I Ziaeian +3 more
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Crystallography of organic energetic materials: thermoelastic properties and equation of state
Acta Crystallographica Section B, EarlyView.Thermoelastic properties and equation‐of‐state parameters of 16 organic energetic molecular crystals are systematically compiled and compared from temperature‐ and pressure‐dependent crystallographic data. The analysis highlights anisotropic thermal expansion and compressibility and identifies structural factors governing the mechanical response of ...
Mathieu Guerain
wiley +1 more source
Nonlinear Mathieu Equation and its Approximation Without a Small Parameter
Engineering Transactions, 2015 In this paper, the linear and nonlinear Mathieu equations without a small parameter are considered, which cannot be solved by the perturbation techniques.
Ji-Huan He
doaj +1 more source
Functional Ecology, EarlyView.Read the free Plain Language Summary for this article on the Journal blog. Abstract Soil food web models are essential for linking animal diversity to carbon and nutrient cycling. However, it is unclear how soil animals regulate excess carbon when nutrient availability limits their growth and how to best represent animal respiration in these models. To
Robert W. Buchkowski +8 more
wiley +1 more source