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Logical coupling (or evolutionary coupling or change coupling) analysis exploits the release history of a software system to find change patterns among modules or classes: e.g., entities that are likely to be changed together or sequences of changes (a change in a class A is always followed by a change in a class B).
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The Correlation Spectroscopy experiment operates by correlating nuclei coupled to each other through scalar coupling, also known as J-coupling. [8] This coupling is the interaction between nuclear spins connected by bonds, typically observed between nuclei that are 2-3 bonds apart (e.g., vicinal protons).
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A typical example of classic Ullmann biaryl coupling is the conversion of ortho-chloronitrobenzene into 2,2'-dinitrobiphenyl with a copper - bronze alloy. [9] [10] 2 C 6 H 4 (NO 2)Cl + 2 Cu → (C 6 H 4 (NO 2)) 2 + 2 CuCl. The reaction has been applied to fairly elaborate substrates. Ullmann reaction
In electrical circuits sharing a common signal return path, electrical impedance in the return path creates common impedance coupling between the signals, resulting in crosstalk. [ 1 ] [ 2 ] Crosstalk is a significant issue in structured cabling , audio electronics , integrated circuit design , wireless communication and other communications ...
The reaction proceeds in moderate yield at room temperature in methanol with formaldehyde or a variety of aryl aldehydes. For example, p-nitrobenzaldehyde reacts to form the β-lactam shown in 71% yield as a 4:1 diastereomeric mixture: An example of the use of the Ugi reaction to form a beta-lactam