Results 241 to 250 of about 5,971,343 (292)

Gauge and Mass Parameter Dependence¶of Renormalized Green's Functions

Communications in Mathematical Physics, 2001
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Breitenlohner, Peter, Maison, Dieter
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A Green function approach to effective mass theory

Proceedings of the Physical Society, 1967
Effective mass theory is reformulated in terms of one-electron Green's functions. This enables a generalization of effective mass theory to be made and leads to an approximate Green function for the periodic lattice. The Green function is evaluated for a two-band model and used to calculate the energy levels of a hydrogenic impurity.
T Lukes, M Roberts
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Green function approach to mass fluctuation waves

Journal of Low Temperature Physics, 1972
In earlier work, a model Hamiltonian has been used to study in detail the effects of4He impurities in solid3He. Starting with this Hamiltonian we use the Green function method, with a suitable decoupling scheme, to study the “mass fluctuation” waves caused by the impurities, and also to study the effect of the impurity terms in the Hamiltonian on the ...
V. Balakrishnan, Radha Balakrishnan
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Perturbation theory for Green’s functions as an effective mass formalism

Journal of Mathematical Physics, 1977
A formal solution for Green’s functions of the type [∂2+m2+gV (x)]G (x,y) =δ (x−y) is presented which has the structure of an effective mass formalism. One first solves the free case [gV (x) =0] for given boundary conditions and then replaces the parameter m in the solution by a quantity depending on V (x).
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Mass Defects in Polyethylene and the Role of Mass Weighting in Phonon Green's Function Theory

physica status solidi (b), 1988
AbstractIn phonon Green's function theory two representations of the defect matrix operator are used, a frequency‐dependent and a frequency‐independent. Care has to be taken when changing from one definition to the other: Not all results are independent of the definition chosen.
P. C. Hägele, S. Wolf, C. Schmid
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Mass spectrometry in the age of green analytical chemistry

Green Chemistry
Vital aspects to consider when implementing green analytical chemistry in mass spectrometry.
Yuchen Zou, Weiwei Tang, Bin Li
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Analysis of Acrylamide in Green Tea by Gas Chromatography−Mass Spectrometry

Journal of Agricultural and Food Chemistry, 2006
Optimization of the solid-phase extraction cleanup procedure enabled the GC-MS analysis of acrylamide in tea samples without the interference of bromination by tea catechins. Although polyvinylpolypyrrolidone (PVPP) is available for removing tea catechins from tea extract, the peaks derived from PVPP had the same retention time as brominated acrylamide
Yuzo, Mizukami, Katsunori, Kohata, Yuichi, Yamaguchi, Nobuyuki, Hayashi, Yusuke, Sawai, Yoshihiro, Chuda, Hiroshi, Ono, Hiroshi, Yada, Mitsuru, Yoshida   +8 more
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Nonisotropic Mass Transfer Model for Green Bean Drying

Journal of Agricultural and Food Chemistry, 1997
Two diffusional models were developed for finite cylindrical shaped bodies which take into account that mass transfer could have a nonisotropic nature. In the first model, sample shrinkage was ignored; thus, it was solved by the separation of variables method.
C. Rosselló, S. Simal, N. SanJuan, A. Mulet   +3 more
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Mass Spawning by Green Algae on Coral Reefs

Science, 1997
Predawn episodes of mass spawning by green algae (up to nine species in five genera on a single morning) intermittently cloud Caribbean waters. Species- and sex-specific bouts of anisogamous gamete release occurred synchronously and predictably on a given morning, with closely related species spawning at different times.
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Mass “Green” Digital Technologies in the Economy: The Future and the Present

2020
Purpose: The aim is to identify the current level of “green” digital technology diffusion in the economy, as well as to develop future scenarios and recommendations to ensure the mass availability of these technologies for an accelerated “green” digital economy.
Zalina L. Kantsalieva, Darima A. Kozhanova, Andrey A. Bezhovets   +2 more
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