NOT "THE USUAL BOND."

Not your usual NMR

The CPT theorem implies, except for the sign of various properties such as charge, a particle and its antiparticle should be absolutely identical. The theorem is an essentially inviolable tenet of quantum field theory, and one that follows from the assumption that physics is the same in all inertial frames. The CPT theorem has been tested with baryons—composite particles made up of quarks bound...

Not Your Usual Pre-Excitation.

1759 ECG CHALLENGE A 67-year-old man with a medical history of moderate to severe mitral regurgitation secondary to flail posterior mitral valve leaflet, hypertension, type II non–insulindependent diabetes mellitus, and paroxysmal atrial fibrillation was found to have the following ECG (Figure 1) after elective mitral valve repair. What abnormalities are present? Do you recommend further testin...

Not the usual suspects: the unexpected sources of tissue regeneration.

Re-evaluation of the bond length-bond strength rule: The stronger bond is not always the shorter bond

A set of 42 molecules with N-F, O-F, N-Cl, P-F, and As-F bonds has been investigated in the search for potential bond anomalies, which lead to reverse bond length-bond strength (BLBS) relationships. The intrinsic strength of each bond investigated has been determined by the local stretching force constant obtained at the CCSD(T)/aug-cc-pVTZ level of theory. N-F or O-F bond anomalies were found ...

Not the usual suspects: human wound myiasis by phorids.

Infestation of animal tissues by dipteran larvae (myiasis) commonly occurs in many species, but it is unusual for humans in temperate regions. Nevertheless, human myiasis is regularly observed in many primary care facilities in the United States. Beyond medical issues associated with treating human myiasis, both the causal agent and the longevity of myiasis can have legal implications, for exam...