Dolly at 25… is she ‘… still goin’ strong?’

Is there still a strong CP problem ?

The rôle of a chiral U(1) phase in the quark mass in QCD is analysed from first principles. In operator formulation, there is a parity symmetry and the phase can be removed by a change in the representation of the Dirac γ matrices. Moreover, these properties are also realized in a Pauli–Villars regularized version of the theory. In the functional integral scenario, attempts to remove the chiral...

Discrepant analysis is still at large.

In the June 2000 issue of the Journal of Clinical Microbiology, a guest commentary entitled “Discrepant Analysis: How Do We Test a Test” (7) was published; in it, the author made a very strong case against using this method to evaluate new diagnostic tests. In light of this commentary, as well as the other published criticisms of discrepant analysis (2, 3, 5, 8), I was recently very surprised t...

Malpractice: what is still at risk?

is ddh still a problem?

developmental dysplasia of the hip (ddh) is the most frequent developmental disorder of the locomotor system. it is detected among 0.1–5.2% of newborns (1, 2). this might be the reason, that there is a high interest to detect ddh cases as early as possible. undetected or late cases lead to catastrophes for the patient and family. limping, leg length discrepancy, pain, frequent operations and so...

Dolly clouds cloning hopes

The push to develop commercially viable cloned animals as a source of organs for human transplants ratcheted up another success last month, but veteran Dolly, the cloned sheep has raised some doubts about the wider issues of cloning. Two teams produced piglets cloned from adult cells in which a copy of a gene controlling production of a particular cellsurface sugar had been knocked out. Shortly...