Homeowork 3 - Answers - Homework Problem Set 3 Iverson...

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Homework Problem Set 3 Iverson CH310N Due Wednesday, February 6 Chemistry 310N Dr. Brent Iverson 3rd Homework February 1, 2008 NAME (Print): _____________________________ SIGNATURE: _____________________________ Please print the first three letters of your last name in the three boxes
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Homework Problem Set 3 Iverson CH310N Due Wednesday, February 6 Score: _________
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Homework Problem Set 3 Iverson CH310N Due Wednesday, February 6 In the FT NMR method, the FT stands for _____________________ _______________________. The basic idea is that a short pulse using a range of radio frequencies are used to flip the spins of all of the hydrogen _______________________ at once. Then, the nuclear spins _____________________ back to the +1/2 spin state and when they do, they _____________________ electromagnetic radiation at the precise frequency at which they absorb. The ________________________ _________________________ (FT) analysis of the signals is used to derive the original frequencies characteristic of the resonancce of each type of H atom in the molecule. The important advantage of the FT NMR method is that many spectra can be acquired in a short period of time. The data is averaged, greatly increasing the __________________ to __________________ ratio of the spectra. MRI stands for ____________________ _____________________ ____________________. MRI is based on the same principles as NMR, namely the ___________________ (i.e. resonance) of ____________________ ___________________ of protons by radio frequency irradiation when a patient is placed in a strong _________________________ field. ___________________ ____________________ gradients are used to gain imaging information, and rotation of the gradient around the ___________________ of the object gives imaging in an entire plane (i.e. slice inside patient). In an MRI image, you are looking at individual ________________________ that when stacked make up the three-dimensional image of relative amounts of ________________________, especially those from ______________________ and ____________________, in the different tissues.
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Homeowork 3 - Answers - Homework Problem Set 3 Iverson...

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