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2 Apr 2007: However, if sensitivity is low, the flip angle can be increased up to 20 degrees.

26 Jun 2003: greater than the width of the normal spectrum. For the spectra shown here the range was 20.

5 Mar 2002: Such spectra have proved to beenormously useful in structure determination, and are responsible for the ex-plosive growth of NMR over the past 20 years or so.

7 Aug 2003: The swept-frequency pulses were adiabatic 1808 CHIRPpulses;[10] the frequency was swept through 20 kHz in tf = 50 ms(except for the TOCSY pulse sequence, where the frequency wasswept through ... Delays of 43.5 ms for the z-COSY experiment and 20 ms for

26 Aug 2011: 1. Coherence order and coherence selection. James Keeler. EUROMAR 2011. Department of Chemistry. Outline• Why we need coherence selection• Concept of coherence order• Coherence transfer pathways (CTPs)• Selecting a CTP with phase cycling•

24 Feb 2004: Such spectra have proved to beenormously useful in structure determination, and are responsible for the ex-plosive growth of NMR over the past 20 years or so.

17 Sep 2007: b). (c). (d). 20 15 11 16 {15,16}. 81 {2,5} 7. ... ntal details: the J-spectrum was recorded at 500 MHz for protons, with 36uncated at 1% [20]; the accompanying gradient had a strength of 3% of theere 20 kHz and 100

26 Jun 2014: nt. time. Mz = 20 Mz = 16 Mz = 12 Mz = 0How relaxation arises 7. ... b2 120 j(0)︸ ︷︷ ︸W0. = b2 310 2τc b21. 20 2τc= 12 b.

7 Aug 2003: Thrippleton, N. M. Loening and J. Keeler. 0. 5. 10. D /. 101. 0 m. 2 s1. 15. 20. 25. 1 2 3 9 5 6 7 8 4. ... EXPERIMENTAL. MaterialsThe sample was prepared by the addition of camphene(15 mg) and

25 Mar 2014: cos (τ) sin (τ)Îy sin (τ) sin (τ)Îx Îx Spin echoes 20.

5 Mar 2002: d 30 transferred to 20, 30 and 60. e 30 and 60 transferred to 30 and 60.

5 Mar 2002: 2. = 20 log10(. ωnew1 /2π. ωinit1 /2π. ). This expression can be used to find the correct setting for the attenuator.As the duration of a pulse of a given flip angle ... power ratio in dB = 20 log10(. τinit. τnew. ). For example, suppose we have

7 Oct 2003: natural Xenon, Phys. Rev. 121 (1961) 20–25. [6] R.J. Kurland, R.G.

24 Feb 2004: 2. = 20 log10. (ωnew1 /2π. ωinit1 /2π. ). This expression can be used to find the correct setting for the attenuator.As the duration of a pulse of a given flip angle ... power ratio in dB = 20 log10. (τinitτnew. ). For example, suppose we have

1 Feb 2001: Thesecan be very labour saving. 2–20. 0XOWLSOHTXDQWXPFRKHUHQFH. 2.9.1 Multiple-quantum terms. In the product operator representation of multiple quantum coherences it isusual to distinguish between active and passive

1 Feb 2001: 1–20. 1.4.2 Pulses. In NMR the nuclear spin magnetization is manipulated by applying a magneticfield which is (a) transverse to the static magnetic field i.e.

9 Jan 2007: 10 and 20.This analysis assumes that each population term that is present immediately after the first β. ... For example, increasing them from 10 to 20 increases the signal-to-noise ratio by a factor ofalmost 4.

24 Feb 2004: interpretation of thispeak is that a signal was present during t1 which evolved with a frequencyof 20 Hz. ... Finally, consider the spectrum shown in c. Here there are two peaks, oneat F 1 = 20 Hz, F2 = 80 Hz and one at F 1 = 20 Hz, F2 = 20 Hz.

12 Mar 2002: 8–20. For this spectral density function, the maximum contribution at frequency ωis found when τc is 1/ω; this has important consequences which are described inthe next section.

24 Feb 2004: 8–20. At very short correlation times (τc << 1/ω0) there is some spectral densityat the Larmor frequency, but not that much as the energy of the motion isspread over a

1 Feb 2001: 4–20. phase cycle it in such a way as to select a particular value of p.

1 Feb 2001: 4–20. phase cycle it in such a way as to select a particular value of p.

12 Mar 2002: 9–20. sampled at regular intervals. After transformation the resulting spectrumdisplays correctly peaks with offsets in the range –(SW/2) to (SW/2) where SWis the spectral width which is given

5 Mar 2002: a) (b). (c). -20 -1010 20. -1. -0.5. 0.5. 1. -20 -10 0 10 20. ... 0.5. 1. -20 -10 10 20. -1. -0.5. 0.5. 1. MxMy.

23 Jul 2002: 4–20. them to the edge of the spectrum so that they are less likely to obscurewanted peaks.

24 Feb 2004: 9–20. them to the edge of the spectrum so that they are less likely to obscurewanted peaks.

24 Feb 2004: 2–16 NMR and energy levels. 3424 1213. 12 34. 0 20 10040 60 80. ... frequency (Hz) –ν0,1. ν0,2 = –90. ν0,2 = –50. ν0,2 = –20.

5 Mar 2002: 4.13. tacqtacq /20. 0 π/4π/8 π/2phase. Fig. 4.13 The top row shows sine bell and the bottom row shows sine bell squared weighting functions fordifferent choices ... Suppose that the transmitter is placed in the middle of the shift range andthat a 90

24 Feb 2004: RF. acq. 90˚ 180˚. τ τ. 2τ. Fig. 3.20 Pulse sequence for the spinecho experiment. ... 0.5. 1. -20 -10 10 20. -1. -0.5. 0.5. 1. MxMy.

5 Mar 2002: 2.6 Strong coupling 2–15. 3424 1213. 12 34. 0 20 10040 60 80. ... frequency (Hz) –ν0,1. ν0,2 = –90. ν0,2 = –50. ν0,2 = –20.

24 Feb 2004: d 30 transferred to 20, 30 and 60. e 30 and 60 transferred to 30 and 60.

1 Feb 2001: 2–20. influence of the coupling between the two active spins, i and j.

23 Nov 2001: For both spectra, the contour lines correspond to 1, 2, 5, 10,20, and 50%.

24 Feb 2004: 4.13. 4–14 Fourier transformation and data processing. tacqtacq /20. 0 π/4π/8 π/2phase. ... Suppose that the transmitter is placed in the middle of the shift range andthat a 90 pulse of width 20 µs is used to excite the spectrum.

7 Aug 2003: iπ 1Jtrialt2. ). (20). This function for the trial multiplet is compared with that for the long-rangecross peak (Eq. ... 20 4.9 5.6 5.1 12.5c, 5.7b. 23 5.7 7.1 7.1 6.2b.

1 Feb 2001: Finally, consider the spectrum shown in c. Here there are two peaks, oneat F1 = 20 Hz, F2 = 90 Hz and one at F1 = 20 Hz, F2 = 20 Hz. ... 3–20. /LQHVKDSHVDQGIUHTXHQFGLVFULPLQDWLRQ. This is a somewhat involved topic which will only be possible to cover

1 Feb 2001: the mixing period and continued to evolve at 20 Hz during t2.The processes by which these signals are transferred will be discussed in thefollowing sections. ... Finally, consider the spectrum shown in c. Here there are two peaks, one atF1 = 20 Hz, F2 =

1 Feb 2001: The processes of going from a system of one spin. 1–20.

9 Aug 2003: densities Jq q, ω( ) will be written asJq ω( ). 6–20. 6.3.4.2 Relaxation of IzThe relaxation behaviour of the Iz operator is determined by evaluating. [ ][ ] ( )( ) ( ) ( ... q pq, ,'. ,. ω. gives. ( ) ( ) ( ) ( ) ( ){ }I J J J J JS I S I I S18 0 12

5 Mar 2002: the mixing period and continued to evolve at 20 Hz during t2.The processes by which these signals are transferred will be discussed in thefollowing sections. ... Finally, consider the spectrum shown in c. Here there are two peaks, one atF1 = 20 Hz, F2 =

9 Aug 2003: 20 0h hω ω. The population of the two spin states is therefore. ... 5–20. Schrödinger equation. ddψ ψt. tiH t. ( ) = ( ). where H is the relevant hamiltonian. For a spin in a static magnetic field (ofstrength B0) along the z-axis, the hamiltonian