Optical pulsations from 4U 0900-40 - Do they exist

'Forbidden points' in pregnancy: do they exist?

Acupuncture has been used in numerous diseases and for many types of symptoms. It has been also used for obstetric complaints, such as nausea and vomiting, insomnia and low back and girdle pain. There has long been concern that some points--called forbidden--might harm pregnancy owing to a potential abortifacient effect, but it is difficult to confirm this proposition. The small number of avail...

Relativistic Whistler Oscillitons – Do They Exist?

We examine the effects of relaxing the assumption of quasi-charge neutrality on the propagation of stationary whistler waves. This necessitates that in the wave frame the equations of motion must be made fully relativistic and when this is done, the correct form of the relativistic dispersive effects is recovered. Our numerical solutions indicate that fully relativistic effects can prevent the ...

Scientific Banana Republics: Do They Exist?

Specific PKG inhibitors: do they really exist?

Background Cellular cGMP effects can be mediated by a number of effectors including cGMP-dependent protein kinases (PKGs), cGMP-stimulated phosphodiesterase (PDE2), cGMP-inhibited phosphodiesterase (PDE3), and cGMPgated channels. Pharmacological inhibitors of PKG are often used to discriminate between these diverse cGMP effects. Currently used PKG inhibitors can be divided into three classes: c...

Chronic pulmonary aspergilloses: do they exist?

In an editorial of this journal in 2006, Professor de Marinis made a heartfelt appeal to Italian pulmonologists to become more active and involved in the field of lung tumors [1]; today we find ourselves in the same situation regarding pulmonary mycoses with, we fervently hope, more chance of success. Recently, within the span of one month two eminent clinicians as well as a biologist, expert i...