نتایج جستجو برای elemental analysis

تعداد نتایج: 1670994  

2014
Jacob Feldman,

It is well-known that abstract neurons of the McCulloch-Pitts type compute input-output functions that are formally equivalent to suitably defined Boolean functions. Boolean functions, in turn, can be classified (up to isomorphism of underlying logical structure) into a limited number of basic types, each of which is non-isomorphic to each other type. These basic types are conveniently expresse...

2008
W. SCHöNIGER, W. SCHONIGER,

The influence of instrumental analysis, i.e., physicochemical methods, has become increasingly important in organic chemistry, but organic elemental microanalysis is by no means an obsolete field. On the contrary, with the development of new methods, the organic chemist obtains the results that he needs for a first orientation on a compound, more quickly and more reliably than ever before. Toda...

Journal: :Archives of disease in childhood 1983
C O'Moráin, A M Segal, A J Levi, H B Valman,

2016
Daniel Gall,

The electron mean free path k and carrier relaxation time s of the twenty most conductive elemental metals are determined by numerical integration over the Fermi surface obtained from first-principles, using constant k or s approximations and wave-vector dependent Fermi velocities vf (k). The average vf deviates considerably from the free-electron prediction, even for elements with spherical Fe...

Journal: :Emergency medicine journal : EMJ 2002
M Poulden,

A case of poisoning with a mercury "solution" is reported. The solution was known to contain mercury but its exact nature was unknown. Despite appropriate initial management, various assumptions were made that resulted in a "toxic" level. The presentation and management is discussed.

2000
Paul G. Falkowski, Harold Urey, Richard Fleming,

In 1934, the year Harold Urey was awarded a Nobel prize in chemistry for the discovery of deuterium, Alfred Redfield (Fig. 1), a 44-year-old animal physiologist at Harvard University, proposed that marine plankton have relatively constrained elemental ratios (Redfield 1934). The so-called Redfield ratios of 106 C: 16 N: 1 P (by atoms) were subsequently embraced by many biological oceanographers...

2009
Björn Meder, Michael R. Waldmann,

Whereas the traditional normative benchmark for diagnostic reasoning from effects to causes is provided by purely statistical norms, we here approach the task from the perspective of rational causal inference. The core feature of the presented model is the assumption that diagnostic inferences are constrained by hypotheses about the causal texture of the domain. As a consequence, the model’s pr...

2003
Tung-Yuan Ho, Antonietta Quigg, Zoe V. Finkel, Allen J. Milligan, Kevin Wyman, Paul G. Falkowski, François M. M. Morel,

We analyzed the cellular content of C, N, P, S, K, Mg, Ca, Sr, Fe, Mn, Zn, Cu, Co, Cd, and Mo in 15 marine eukaryotic phytoplankton species in culture representing the major marine phyla. All the organisms were grown under identical culture conditions, in a medium designed to allow rapid growth while minimizing precipitation of iron hydroxide. The cellular concentrations of all metals, phosphor...

2013
Y. B. Wang, X. Z. Liao, Y. H. Zhao, J. C. Cooley, Z. Horita, Y. T. Zhu,

Y. B. Wang, X. Z. Liao, Y. H. Zhao, J. C. Cooley, Z. Horita, and Y. T. Zhu School of Aerospace, Mechanical and Mechatronic Engineering, The University of Sydney, Sydney, NSW 2006, Australia School of Materials Science and Engineering, Nanjing University of Science and Technology, Nanjing 210094, China Division of Materials Science and Technology, Los Alamos National Laboratory, Los Alamos, New ...

Journal: :Psychological review 2006
Justin A Harris,

This article reviews evidence and theories concerning the nature of stimulus representations in Pavlovian conditioning. It focuses on the elemental approach developed in stimulus sampling theory (R. C. Atkinson & W. K. Estes, 1963; R. R. Bush & F. Mosteller, 1951b) and extended by I. P. L. McLaren and N. J. Mackintosh (2000, 2002) and contrasts this with models that invoke notions of configural...

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