Search results for "coupling [Lambda(1520)]"
showing 10 items of 501 documents
Electrochemical Formation of 3,5-Diimido-1,2-dithiolanes by Dehydrogenative Coupling
2018
A synthetic approach to the cyclic disulfide moiety of 3,5-diimido-1,2-dithiolane derivatives starting with readily available precursors including the electrochemical coupling of dithioanilides is developed. The electrochemical key step provides sustainable synthetic access in high yields, using a very simple electrolysis setup.
Supporting-Electrolyte-Free and Scalable Flow Process for the Electrochemical Synthesis of 3,3′,5,5′-Tetramethyl-2,2′-biphenol
2020
The most efficient electrochemical synthesis of 3,3′,5,5′-tetramethyl-2,2′-biphenol by dehydrogenative coupling is reported. The electrolysis is performed supporting-electrolyte-free in 1,1,1,3,3,3...
Coherent axion-photon transformations in the forward scattering on atoms
2018
In certain laboratory experiments the production and/or detection of axions is due to the photon-axion transformations in a strong magnetic field. This process is coherent, and the rate of the transformation is proportional to the length $l$ and magnitude $B$ of the magnetic field squared, $\sim l^2B^2$. In the present paper, we consider coherent production of axions due to the forward scattering of photons on atoms or molecules. This process may be represented as being due to an effective electromagnetic field which converts photons to axions. We present analytical expressions for such effective magnetic and electric fields induced by resonant atomic M0 and M1 transitions, as well as give …
Applications of the Fault Decoupling Device to Improve the Operation of LV Distribution Networks
2008
The aim of this paper is to present the operating principle of a new resonant device, called the fault decoupling device (FDD), able to improve power quality in electrical distribution systems. In low-voltage networks, this device can be employed in order to mitigate voltage dips due to faults or large induction motor startup. Moreover, in the presence of distributed-generation (DG) units, the FDD allows one to obtain various benefits such as a reduction of the fault current in each node of the network and an increase in the voltage at the DG unit node. In order to show the performances of the FDD, analytical studies and computer simulations were carried out which took into account various …
Modelling nanoscale fluid dynamics and transport in physiological flows
1996
The concept of nanotechnology is discussed, and its connection with biomedical engineering is elucidated. For the specific field of nanoscale flow and transport problems of physiological relevance, some typical examples are presented, and their interaction is discussed for some classic biomechanical problems like the flow in arteries with blood-wall coupling. Then, existing computational models are presented and classified according to the length scale of interest, with emphasis on particle-fluid problems. Final remarks address the essential unity of biomedical and engineering behaviour and the possible relevance to small-scale industrial research.
Fiber-Optic Insulating Link In A Telecommunication System For An Electric Power Plant
1990
The paper presents a fiber-optic insulating link coupling electric power substation with a dispa-tching telecommunication center. The advantages of employing the FO link in the power plant telecommunication system include insulating properties, resistance to EMI and high transmission capacity. The technical and economical analyses are complemented with the example of an application of the link to the 110/15 kV station. The two-directional communication system provides transmission of voice, telemetry, telesignalization and remote control signals.
Conceptual study of the coupling of a biorefinery process for hydrothermal liquefaction of microalgae with a concentrating solar power plant
2017
A conceptual analysis of the coupling of a concentrating solar power plant with a chemical process for hydrothermal liquefaction (HTL) of microalgae to biocrude was performed. The two plants were considered coupled by molten salt recirculation that granted energetic supply to the chemical process. Preliminary estimations have been done considering a solar field constituted by 3 linear parabolic solar collectors rows, each 200 m long, using a ternary molten salts mixture as heat transfer fluid, and a chemical plant sized to process 10 kT/y of microalgae. Under adopted conditions, we have estimated a minimum selling prize of the biocrude that is similar to that achieved in non-solar HTL proce…
New method for real-time dynamic focusing through interfaces
2013
[EN] In nondestructive evaluation (NDE) a coupling medium (wedge) is frequently inserted between the array probe and the object being evaluated. In this situation, focal law computing is complicated by the refraction effects at the interface. Furthermore, there are not known techniques to perform dynamic focusing by hardware in these conditions. This work addresses these problems by following a two-step procedure. First, a virtual array that operates in a single medium with nearly equivalent time-of-flight to the foci is obtained. Then, simple hardware is proposed to perform dynamic focusing in real-time. It operates with arrays of any geometry as required by the virtual array in presence o…
Family and non-family businesses in iran:Coupling among innovation, internationalization and growth-expectation
2021
Gallo and Sveen, in 1991, specified problems of whether family businesses can take advantage of factors facilitating internationalization. We compare family and non-family businesses in innovation, export, and growth-expectation, and consider how outcomes are aligned, with a coupling that may be loose, with a synergy that benefits the business. This raises a further issue, is governance of a business affecting not only each of the outcomes but also their coupling. A representative sample of 530 Iranian businesses was surveyed in 2018 for Global Entrepreneurship Monitor. Innovation, export, and growth-expectation are found to be lower in family businesses. Coupling between innovation and exp…
RETRACTED: trans-Tetrakis(pyridine)dichloroiron(II) as catalyst for Suzuki cross-coupling in ethanol and water
2008
Aryl bromides can be coupled with phenylboronic acid in moderate to excellent yields using a transtetrakis(pyridine)dichloroiron(II) catalyst. The Suzuki–Miyaura reaction can be carried out under air in ethanol and aqueous ethanol with low catalyst loading. Addition of TBAB dramatically increases the yields in aqueous ethanol or in water. trans-Tetrakis(pyridine)dichloroiron(II) offers an environmental and less expensive method for the synthesis of biaryl compounds. This is the first example of an iron– pyridine catalyst for Suzuki cross-coupling.