THE NURSE-MIDWIFE—A PIONEER

The Pioneer Anomaly

Radio-metric Doppler tracking data received from the Pioneer 10 and 11 spacecraft from heliocentric distances of 20-70 AU has consistently indicated the presence of a small, anomalous, blue-shifted frequency drift uniformly changing with a rate of ∼ 6 × 10-9 Hz/s. Ultimately, the drift was interpreted as a constant sunward deceleration of each particular spacecraft at the level of aP = (8.74 ± ...

Importance of nurse logs as a substrate for the regeneration of pioneer tree species on Barro Colorado Island, Panama

Fallen tree trunks (‘nurse logs’) are important recruitment sites for trees in temperate forest, however nurse log use is seldom reported in tropical forests. We predicted that logs should be important for the regeneration of small-seeded tropical pioneer species because surface leaf litter and competition with established vegetation reduces the establishment success of these species from soil ...

The comparison stress, Anxiety and depression of nurse and non-nurse staff in the exposed of COVID 19

Background : One of the groups involved in Covid-19 is health care workers, especially nurses, who, in addition to endangering their physical health, are exposed to psychological damage. The aim of this study was to compare the stress, anxiety and depression of nurse staffs against non-nurse  in the face of Covid-19. Methods: The present study is a descriptive cross-sectional study in which 29...

Parnham—A Pioneer Venture

A parasite pioneer

The concept that infectious biological agents were responsible for many diseases was controversial in the midnineteenth century. But key experiments by famed scientists such as Louis Pasteur and Robert Koch eventually won over sceptics. However, some other researchers, equally convinced by this notion, and who also carried our convincing experiments in its support at the same time, have failed ...