180° puls coupling

Powell, R.M., Puls, R.W., Hightower, S.K., and Sabatini, D.A., Coupled iron corrosion and chromate reduction mechanisms for subsurface remediation, Environ. Sci. Technol, 29, 1913-1922, 1995. 

Now we must add the coupling between A and X and between B and X. Since A and B are different, there is no reason why /Ax and /Bx should be the same. One is normally larger than the other, and both are normally smaller than /AB, since /AX and /Bx are vicinali] couplings while ]AB is a gem-inal 2/coupling. We shall arbitrarily pul /Ax > /bx in this example. 

Vhe universal, immediate reaction is that the amphetamine high is like I nothing else. Ton fix up a I shot. Toil dissolve it in water. Tou draw it up into the dropper. Tou pul a belt or a tie around your arm. In the meantime, you re very excited your heart s beating fast. Causeyou know you re going to get i happy in a couple minutes. Then you give yourself a shot. ... 

Powell RM, Puls RW, Hightower SK, Sabatini DA. (1995). Coupled iron corrosion and chromate reduction Mechanisms for subsurface remediation. Environmental Science and Technology 29 1913-1922. 

Limbeck A, Puls C, Handler M (2007) Platinum and palladium emissions from on-road vehicles in the Kaisermtihlen tunnel (Vienna, Austria). Env Sci Technol 41 4938 945 Liu P, Su Z, Wu X, Pu Q (2002) Application of isodiphenylthiourea immobilized silica gel to flow injection on-line microcolumn preconcentration and separation coupled with flame atomic absorption spectrometry for interference-free determination of trace silver, gold, palladium and platinum in geological and metallurgical samples. J Anal At Spectrom 17 125-130... 

Fig. 9. Pulse sequence for the constant time CT-HMBC experiments devised by Furihata and Seto. The authors reported two variants of the experiment, the CT-HMBC-1 pulse sequence shown in Panel (a) and the more complex CT-HMBC-2 pulse sequence shown in Panel (b). (a) The CT-HMBC-1 sequence utilizes a pair of decremented delays (A , — / /2) flanking the incremented duration of the evolution period. As the delays u.sed for the evolution period (t ) are incremented from zero to the delay intervals — I I2 are correspondingly decremented from A = q" to zero, thereby keeping the overall duration of the CT-HMBC-1 pulse sequence constant. This approach has the beneficial effect of suppressing J-modulation due to homonuclear couplings, thereby improving resolution in the indirectly detected frequency domain, (b) The CT-HMBC-2 pul.se sequence utilizes a decremented delay with a 180° H pulse midway through it prior to the evolution period of the type (A - t /2) — 180° H - (A,i — /i/2). The authors note that this modification, in addition to suppressing J-modulation due to homonuclear coupling also suppresses heteronuclear couplings to provide a further improvement in re.solution relative to the CT-HMBC-1 pulse sequence.

The patient is defibriUated while coupled to the amplifier. A defibrillator shock can be up to 5 kV and is applied via two large electrodes to the thorax. A substantial part of this voltage can appear between PUl and PU2. The frequency is much lower and the LPFs will damp the signal much less than the static discharge case. But file protection diodes will play an important role. 

Figure 12. Proton-coupled (A) and proton broadband decoupled (B) C NMR spectra of 10% ethylbenzene in CDCl.i ( ). Applied frequency 100.6 MHz puls width 13.5 is repetition time 5 s number of accumulations 1024 and 128 measuring lime 8.5 min and 11 min. respectively.

Fig. 3 Schematic of 2T (a), 3T (c) and 4T (e) configurations and their respective sensitivity fields (b, d, f) for a generic conductor. In electrochemical analysis WE (green) is the working electrode, CE (red) is the counter electrode, RE (white) is the reference electrode. In bioimpedanta measurements CCl and CC2 form the current-carrying (XMiple PUl and PU2 form the voltage pick-up couple. When present, Zp at the electrode/sample interface is reported in yellow (a and c). The sensitivity field (b, d, j) dqrenrls on the angle between the CC and PU equipotential lines (red and blue arrows, respectively) [18].

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