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In COSY-90, the p1 pulse tilts the nuclear spin by 90°. Another member of the COSY family is COSY-45. In COSY-45 a 45° pulse is used instead of a 90° pulse for the second pulse, p2. The advantage of a COSY-45 is that the diagonal-peaks are less pronounced, making it simpler to match cross-peaks near the diagonal in a large molecule.
Two-dimensional NMR methods are almost always used with nucleic acids. These include correlation spectroscopy (COSY) and total coherence transfer spectroscopy (TOCSY) to detect through-bond nuclear couplings, and nuclear Overhauser effect spectroscopy (NOESY) to detect couplings between nuclei that are close to each other in space.
The COSY and TOCSY transfer magnetization through the chemical bonds between adjacent protons. The conventional correlation spectroscopy experiment is only able to transfer magnetization between protons on adjacent atoms, whereas in the total correlation spectroscopy experiment the protons are able to relay the magnetization, so it is ...
House of Leon shares a playful look at what furniture pieces best match the energy, form, and function of ten iconic celebrities.
The best way to boost your VO2 max is through high-intensity interval training (HIIT)—workouts that push you to work hard for short bursts, followed by recovery.
But there are more differences between short and long sailings than just the amount of time guests spend on board. The length of a cruise can help dictate the types of ports passengers visit, the ...
A 900 MHz NMR instrument with a 21.1 T magnet at HWB-NMR, Birmingham, UK Nuclear magnetic resonance spectroscopy, most commonly known as NMR spectroscopy or magnetic resonance spectroscopy (MRS), is a spectroscopic technique based on re-orientation of atomic nuclei with non-zero nuclear spins in an external magnetic field.
Going long vs. going short. The distinction between going long and going short is brief but important: Being long a stock means that you own it and will profit if the stock rises.