Catálogo de publicaciones - revistas

<jats:p>Once lasers have shown that they can spark fusion, what next? Projects in Japan, Europe, and the United States are working to build lasers with the necessary power and repetition rate to make energy from laser fusion a reality.</jats:p>

<jats:p>New materials and techniques are bringing researchers close to a once-unthinkable goal: optical devices tiny enough to work hand in hand with electronic circuits.</jats:p>

<jats:p>Lasers have been shrinking ever since they were invented 50 years ago. But the 44-nanometer "spaser" will be hard to beat.</jats:p>

<jats:p>Forces exerted by light can set tiny objects aquiver, a phenomenon scientists hope to harness in the burgeoning field of cavity optomechanics.</jats:p>

<jats:p> Lombardi <jats:italic>et al</jats:italic> . (Reports, 23 October 2009, p. 585) reported an association between the human gammaretrovirus XMRV and chronic fatigue syndrome. However, their results may be misleading because of various potential sources of bias and confounding. If real, the association may lack generalizability because of the specific characteristics of the cases studied and could be due to reverse causality. </jats:p>

<jats:p> Lombardi <jats:italic>et al</jats:italic> . (Reports, 23 October 2009, p. 585) reported detection of the human gammaretrovirus XMRV in the blood cells of patients with chronic fatigue syndrome (CFS). However, the patient description provided was incomplete. The inclusion of patients from a “CFS outbreak” previously linked with a viral infection, without confirmation in sporadic CFS cases, casts doubt on the role of XMRV in the pathogenesis of CFS. </jats:p>

<jats:p> We reported the detection of the human gammaretrovirus XMRV in 67% of 101 patients with chronic fatigue syndrome (CFS) and in 3.7% of 218 healthy controls, but we did not claim that XMRV causes CFS. Here, we explain why the criticisms of Sudlow <jats:italic>et al</jats:italic> ., Lloyd <jats:italic>et al</jats:italic> ., and van der Meer <jats:italic>et al</jats:italic> . regarding the selection of patients and controls in our study are unwarranted. </jats:p>

<jats:p> Lombardi <jats:italic>et al</jats:italic> . (Reports, 23 October 2009, p. 585) reported a significant association between the human retrovirus XMRV and chronic fatigue syndrome (CFS). However, the cases with CFS and the control subjects in their study are poorly described and unlikely to be representative. Independent replication is a critical first step before accepting the validity of this finding. </jats:p>