NMRQA APK
最新版本
1.2 for Windows
更新
2012年October21日
信息
版 1.2 (#1)
更新 2012年October21日
APK檔案大小 1 MB
Android 最低版本需求 Android 2.3+ (Gingerbread)
開發人員 JPG Malthouse
類別 教育 (應用)
應用 ID appinventor.ai_jpgmprograms.NMRQA
開發者備註 NMRQA is an App containing about 130 simple questions and answers on NMR.
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最新異動
NMRQA 1.2的新功能
In version 1.2 Seven new questions on Dissolution NMR have been added.
In version 1.12 support for low resolution screens(320x240) has been added.
In version 1.10 ~30 new questions and answers were added on solid state NMR. These questions cover the basic concepts of solid state NMR and Dynamic Nuclear Polarisation.
In version 1.12 support for low resolution screens(320x240) has been added.
In version 1.10 ~30 new questions and answers were added on solid state NMR. These questions cover the basic concepts of solid state NMR and Dynamic Nuclear Polarisation.
內容描述
NMRQA is an App containing about a hundred and thirty simple revision questions and answers on NMR. This App is not intended for people who are not familiar with the basic concepts of NMR. Obviously it is not intended for NMR experts. It is intended for scientists and research students who are using NMR and want to check their knowledge of basic NMR facts, experimental parameters, signal processing, relaxation and methods of obtaining maximal signal-to-noise.NMRQA may also be useful for undergraduates undertaking advanced courses on 1D-NMR. It only gives short single or two sentence answers and so it is not intended to replace textbooks or user manuals but it may help you understand them.
It does not contain the material covered in most undergraduate lecture courses or elementary texts and it is limited to 1D NMR. Its focus is on practical aspects. It is hoped it will help you interact with NMR operators and set up your own NMR experiments. There is a list of the topics covered below.
Topics include:-
Larmour frequency and NMR operating frequency.
Chemical shift.
Gyromagnetic ratio.
Locking and shimming.
Sensitivity and natural abundance 1H,13C,15N, 19F and 31P.
Pulse widths.
Paramagnetic effects on signals.
T2 relaxation and optimum acquisition time.
Zero filling.
Signal-to-noise.
Folding and truncation.
Exponential multiplication and linebroadening.
T1 relaxation.
Ernst equation.
Optimising pulse rate and pulse angles.
Measuring T1 values using the progressive saturation technique.
Measuring T1 values using the inversion recovery technique.
Dummy scans.
Dipolar and CSA relaxation.
Effect of molecular size on dipolar and CSA relaxation.
Effect of magnetic field strength on dipolar and CSA relaxation.
Solid State NMR
Magic angle spinning
Cross polarisation
CPMAS
Dynamic Nuclear Polarisation (DNP) in solid state NMR
Temperature jump DNP.
Dissolution NMR.
It does not contain the material covered in most undergraduate lecture courses or elementary texts and it is limited to 1D NMR. Its focus is on practical aspects. It is hoped it will help you interact with NMR operators and set up your own NMR experiments. There is a list of the topics covered below.
Topics include:-
Larmour frequency and NMR operating frequency.
Chemical shift.
Gyromagnetic ratio.
Locking and shimming.
Sensitivity and natural abundance 1H,13C,15N, 19F and 31P.
Pulse widths.
Paramagnetic effects on signals.
T2 relaxation and optimum acquisition time.
Zero filling.
Signal-to-noise.
Folding and truncation.
Exponential multiplication and linebroadening.
T1 relaxation.
Ernst equation.
Optimising pulse rate and pulse angles.
Measuring T1 values using the progressive saturation technique.
Measuring T1 values using the inversion recovery technique.
Dummy scans.
Dipolar and CSA relaxation.
Effect of molecular size on dipolar and CSA relaxation.
Effect of magnetic field strength on dipolar and CSA relaxation.
Solid State NMR
Magic angle spinning
Cross polarisation
CPMAS
Dynamic Nuclear Polarisation (DNP) in solid state NMR
Temperature jump DNP.
Dissolution NMR.
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