Question from NMRWiki Q&A forum Chemical shift evolution compensation for delays flanked by hard or soft pulses

		BioNMR > NMR community > News from other NMR forums
[Question from NMRWiki Q&A forum] Chemical shift evolution compensation for delays flanked by hard or soft pulses

Webservers

NMR processing:

MDD

NMR assignment:

Backbone:

Side-chains:

NOEs:

Structure from NMR restraints:

Ab initio:

Fragment-based:

Rosetta-NMR (Robetta)

Template-based:

GeNMR

I-TASSER

Refinement:

Amber

Structure from chemical shifts:

Fragment-based:

Homology-based:

Torsion angles from chemical shifts:

Preditor

TALOS

Promega- Proline

Secondary structure from chemical shifts:

CSI (via RCI server)

TALOS

MICS caps, β-turns

d2D

PECAN

Flexibility from chemical shifts:

RCI

Interactions from chemical shifts:

HADDOCK

Chemical shifts re-referencing:

NMR model quality:

NOEs, other restraints:

Chemical shifts:

RDCs:

Pseudocontact shifts:

Protein geomtery:

SAVES2 or SAVES4

Quality Control Check

NMR spectrum prediction:

FANDAS

MestReS

V-NMR

Flexibility from structure:

Backbone S2

Methyl S2

B-factor

Molecular dynamics:

Gromacs

Amber

Antechamber

Chemical shifts prediction:

From structure:

Shiftx2

Sparta+

Camshift

CH3shift- Methyl

ArShift- Aromatic

ShiftS

Proshift

PPM

CheShift-2- Cα

From sequence:

Shifty

Camcoil

Poulsen_rc_CS

Disordered proteins:

MAXOCC

Format conversion & validation:

CCPN

From NMR-STAR 3.1

Validate NMR-STAR 3.1

NMR sample preparation:

Protein disorder:

DisMeta

Protein solubility:

Isotope labeling:

Solid-state NMR:

Thread Tools

Search this Thread

Rate Thread

Display Modes

08-02-2012, 10:48 PM

nmrlearner

Senior Member

Join Date: Jan 2005

Posts: 23,732

Points: 193,617, Level: 100

Level up: 0%, 0 Points needed

Activity: 50.7%

Last Achievements

Award-Showcase

NMR Credits: 0

NMR Points: 193,617

Downloads: 0

Uploads: 0

Chemical shift evolution compensation for delays flanked by hard or soft pulses

Chemical shift evolution compensation for delays flanked by hard or soft pulses

Hello all,In a typical 2D experiment, the delay "d0" (t1 increment delay in Bruker) is compensated for the chemical shift evolution that would happen during the rf pulse (hard/soft) that are applied flanking (before and after) the "d0" delay.

I could also find similar such compensations for shaped pulses before a delay in the pulse programs. These compensation factors varies for different types of pulses, e.g. 2/pi for 90 hard pulse , 0.52 for pc490120. Can someone guide me how these compensation factors are calculated for hard as well as shaped pulses? Thanks!

Check if somebody has answered this question on NMRWiki QA forum

Did you find this post helpful?

Similar Threads
Thread	Thread Starter	Forum	Replies	Last Post
Uniform broadband excitation of crystallites in rotating solids using interleaved sequences of delays alternating with nutation Uniform broadband excitation of crystallites in rotating solids using interleaved sequences of delays alternating with nutation Publication year: 2012 Source:Journal of Magnetic Resonance</br> Veronika Vitzthum, Marc A. Caporini, Simone Ulzega, Julien Trébosc, Olivier Lafon, Jean-Paul Amoureux, Geoffrey Bodenhausen</br> In solids that are spinning about the magic angle, trains of short pulses in the manner of Delays Alternating with Nutations for Tailored Excitation (DANTE) allow one to improve the efficiency of the excitation of magnetization compared to...	nmrlearner	Journal club	0	06-13-2012 11:34 AM
SHIFTX2: Chemical Shift Prediction SHIFTX2 website SHIFTX2 is capable of rapidly and accurately calculating diamagnetic 1H, 13C and 15N chemical shifts from protein coordinate data. Compared to its predecessor (SHIFTX) and to other existing protein chemical shift prediction programs, SHIFTX2 is substantially more accurate (up to 26% better by correlation coefficient with an RMS error that is up to 3.3× smaller) than the next best performing program. It also provides significantly more coverage (up to 10% more), is significantly faster (up to 8.5×) and capable of calculating a wider variety of backbone and side chain...	gwnmr	NMR software	0	01-10-2012 06:13 PM
Simultaneous convection compensation and solvent suppression in biomolecular NMR diffusion experiments Simultaneous convection compensation and solvent suppression in biomolecular NMR diffusion experiments Abstract Thermal convection and high intensity solvent resonances can significantly hamper diffusion estimates in pulsed gradient spin-echo nuclear magnetic resonance diffusion experiments on biomolecule samples. To overcome these two problems, a new double functional NMR diffusion sequence, double echo PGSTE-WATERGATE, is presented. The new sequence provides excellent convection compensation and solvent suppression (with a suppression factor in excess of at least 105 in a single scan)...	nmrlearner	Journal club	0	01-09-2011 12:46 PM
[NMR tweet] NMR (Nuclear Magnetic Resonance) magnet to erase hard disk?: Commercial hard disk dem NMR (Nuclear Magnetic Resonance) magnet to erase hard disk?: Commercial hard disk demagnetizers (sanitizers) uses ... http://bit.ly/dnLxNv Published by FreeEnergyMagg (Montana Carlson) on 2010-10-31T03:38:18Z Source: Twitter	nmrlearner	Twitter NMR	0	10-31-2010 04:01 AM
Chapter 13 - NMR Chemical Shift Chapter 13 - NMR Chemical Shift More...	nmrlearner	NMR bookmarks	0	08-19-2010 02:34 PM
Chemical shift of protons? Can someone give me the answers to the chemical shift of the protons in this compound: CH3CH2OCH2CH(CH3)COOH? Of if you can explain how to get the chemical shift it would be quite helpful as the info online does not really help me.	Tim Mrudande	NMR Questions and Answers	1	01-16-2005 08:23 AM
HNMR chemical shift characteristic? Hi, I'm trying to justify why that specific proton has such chemical shift characteristic.The molecule I'm working with is cyclopentadiene. I know that two protons attached on one of five carbon has 2.89ppm and the proton attached to the next carbon has 6.46ppm and the one on next carbon has 6.57ppm. I can't seem to justify the reason for that pattern.Another molecule is anisole. The methiyl group attached to the ester oxygen has 3.79ppm and the proton attached to carbon that is at ortho position with oxygen has 6.88ppm and the next proton(meta position) is 7.29ppm and the next one (para...	Filumena M	NMR Questions and Answers	1	01-09-2005 01:40 AM
what is/ how do you calculate the chemical shift in an NMR? I have read the technical definitions but I still do not understand what the chemical shift means and how you calculate it given an NMR peak. If someone could kind of dumb it down for me but still give me the important things to know/ how it helps you determine the structure of a molecule with the NMR I would appreciate it.	Courtney	NMR Questions and Answers	1	01-01-2002 06:47 PM

« Previous Thread | Next Thread »

Posting Rules
You may not post new threads You may not post replies You may not post attachments You may not edit your posts BB code is On Smilies are On [IMG] code is On HTML code is On Trackbacks are Off Pingbacks are Off Refbacks are Off