Successive reports* in this Journal on the progress of poliomyelitis in the Bristol area serve to co-relate the disease with other infections but reduce what can be usefully said that is new about this much publicised disease. Therefore, it seems best to place before you the bare bones of the incidence during 1950, as reflected in admissions recorded at Ham Green Hospital, and thereafter commen...

463 with special emphasis on those of medical and industrial importance. Since the work is intended for elementary students, they have wisely included extensive sections on techniques of cultivation and classification, the various tools of microbiology, chemotherapy, and bacteriostasis. A reasonable balance is maintained between the structural and functional aspects of classification. The print...

Aim Protected areas (PAs) play an important role in biodiversity conservation, but remain increasingly threatened by invasive alien plant species (IAPS) conjunction with global climate change. The latter is modifying the distribution of former, and magnitude direction distributional changes are predicted to vary depending on dispersal mode. Here, we address question whether clonality expected a...

Linear trends in 1 April snow water equivalent (SWE) in California, USA, are determined from a dense network of observations over the period 1950–2002. These trends are compared to concurrent time series of precipitation and temperature and Pacific Ocean climate indices. We find increased winter temperatures have accompanied both decreasing and increasing SWE trends, resulting in a weak overall...

2.1 Data Description Population distribution is often highly correlated with land cover types and we incorporate land cover information using the finest resolution contemporary ground-validated dataset available for each country. Land cover data are complemented by digital elevation data and its derived slope estimates, primarily from the SRTM-based HydroSheds data (Lehner et al., 2006). We als...

The lethal effect of ultraviolet light, k 254 m/z, on Esckerichia toll, Streptomyces griseus, and other microorganisms can be largely prevented if following ultraviolet irradiation the cells are exposed to visible and near-ultraviolet light in the vicinity of 400 m~ (Kelner, 1949 a, 1949 b, 1950). Such light-induced recovery (or pkotoreactivation, pkotore~ersal, or pkotorecwoery) has been confi...