The survival of various isolates of Cryptosporidium parvum oocysts under a range of environmental pressures including freezing, desiccation, and water treatment processes and in physical environments commonly associated with oocysts such as feces and various water types was monitored. Oocyst viability was assessed by in vitro excystation and by a viability assay based on the exclusion or inclus...

The need has been stressed in recent years for relating the designof fighting equipment to the physiological characteristics of the men who must be responsible eventually for its operation, as well as to its mechanical efficiency. Changes in environment may also affect mental or physical performance of a given task or interfere in other ways with physical well-being. The most widely known examp...

The paper presents an assessment of the degree implementation environmental and climate protection functions by Polish farms agricultural enterprises different size production scale. There are differences in views on this topic literature, with opinions dominating more positive role small biodiversity protection. Farm analysis was made basis Statistics Poland data farm classes established land ...

In developing countries, weak environmental regulatory institutions often undermine conventional command-and-control policies. As a result, these countries are increasingly experimenting with alternative approaches that aim to leverage nonregulatory “green” pressures applied by local communities, capital markets, and consumers. This article reviews three strands of the empirical literature on t...