نتایج جستجو برای: action exchange

تعداد نتایج: 789333  

2002
Robert van Leeuwen

In this work we demonstrate how to derive the Kohn-Sham equations of time-dependent current-density functional theory from a generating action functional defined on a Keldysh time contour. These Kohn-Sham equations contain an exchange-correlation contribution to the vector potential. For this quantity we derive an integral equation. We further derive an integral equation for its functional deri...

Journal: :Biochemical pharmacology 1986
H M Niemeyer N B Calcaterra O A Roveri

DIMBOA (2,4-dihydroxy-7-methoxy-1,4-benzoxazin-3-one) is the main hydroxamic acid isolated from maize extracts. It inhibited reversibly ATP synthesis, Pi-ATP exchange reaction and ATPase activity in submitochondrial particles from bovine heart. Half-maximal effects were obtained with 4, 2, and 6 mM DIMBOA respectively. At higher concentrations it also inhibited mitochondrial electron transport ...

Journal: :The Journal of biological chemistry 1961
B CHANCE

A study of the velocity with which adenosine 5’triphosphate interacts with the carriers of the respiratory chain presents an unusual opportunity to explore the mechanism of action of the energy transfer pathway (1). Previous studies of this mechanism have been limited to: (a) systems in which a portion of the pathway toward the carriers was measured by the Oi8 exchange reaction (2)) the adenosi...

1999
Sangmin Lee

We study the exchange diagrams in the computation of four-point functions of all chiral primary operators in D = 4, N = 4 Super-Yang-Mills using AdS/CFT correspondence. We identify all supergravity fields that can be exchanged and compute the cubic couplings. As a byproduct, we also rederive the normalization of the quadratic action of the exchanged fields. The cubic couplings computed in this ...

Journal: :The Journal of biological chemistry 1994
E Käslan W D Heyer

During purification of a strand exchange activity from Schizosaccharomyces pombe using the three-strand reaction of double-stranded linear and circular single-stranded DNA, we identified p190/210 as an activity that stimulated the strand exchange activity of p140exo2 by about 10-fold. The accompanying report (Käslin, E., and Heyer, W.-D. (1994) J. Biol. Chem. 269, 0000-0000) described the purif...

Journal: :اقتصاد و توسعه کشاورزی 0
حسینی حسینی گیلان پور گیلان پور ایروانی ایروانی

abstract main objective of this paper is to investigate the impact of exchange rate misalignment on wheat’s producer estimates (pse), using the 1989-2007 period’s data. for this purpose, vector error correction model (vecm) along with the use of real exchange rate based on purchasing power party (ppp) was applied to estimate nominal equilibrium exchange rates. then, by using market price suppor...

Journal: :European Spatial Research and Policy 2022

The essence of the city’s existence is its function exchange, subjects which are products and goods, knowledge, information, capital, impressions, experience, participants this process residents newcomers. Tourists in exchange space part newcomer community, interact with residents, share city amenities, but have different needs expectations than leading to conflict. Based on research conducted ...

2008
Roy Lindelauf Iris Blankers Peter Borm Herbert Hamers

Terror cells and military units represent entities in different networked organizations facing a common goal: the organizational structure has to be chosen such that it allows for flexible information exchange while simultaneously providing the necessary secrecy. These kind of organizations have been studied extensively from a qualitative perspective. However, quantitative approaches are less f...

2000
Valentina T. Toneva Ivan N. Minkov

The influence of some early precursors of chlorophyll biosynthesis such as δ-aminolevulinic acid (ALA) and glutamic acid (GA), together with the modulator of chlorophyll synthesis – 2,2 ́-dipyridyl (DP) on dynamic of the tissue water exchange was studied as a consequence of photodynamic action. The accumulation of porphyrines, caused by the combination of chlorophyll precursor and DP, has a phot...

2002
Molly McLure Wasko Robin Teigland

Networks of practice (NOPs) are social spaces where individuals working on similar problems self-organize to help each other and share perspectives about their occupational practice or common interests, and exist primarily through computer-mediated exchange. This exchange of knowledge through message postings produces an online public good, where all participants in the network can access the k...

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