The readily available ex-chiral-pool building block (-)-isosteviol was combined with the C 3-symmetric platforms hexahydroxytriphenylene and hexaaminotriptycene providing large and rigid molecular architectures. Because of the persistent cavities these scaffolds are very potent supramolecular affinity materials for head space analysis by quartz crystal microbalances. The scaffolds serve in part...

introduction:despite advances in disease prevention and food materials technology, food – borne diseases are still a major problem in both developed and developing countries. morever, meat plays a key role in transfer of bacteria, especially “zoonotic” to humans. therefore, we decided to investigate the outbreak of pathogenic bacteria such as salmonella,campylobacter, yersinia and aeromonas in ...

since the mid-19 th century, human activities have increased greenhouse gases such as carbon dioxide, methane, and nitrous oxide in the earth's atmosphere that resulted in increased average temperature. the effects of rising temperature include soil degradation, loss of productivity of agricultural land, desertification, loss of biodiversity, degradation of ecosystems, reduced fresh-water resou...

occupational exposure to blood and body fluids is an important hazard for health care workers, which places them at a high risk for blood-borne infections including hepatitis b virus, hepatitis c virus and human immunodeficiency virus and results in psychological and emotional stresses. several preventive measures have been proposed including pre-exposure ( e.g. , education, use of standard pre...

The number and variety of the common fungi in the air vary as the result of a great many factors. Their tendency to contaminate cultures (particularly of skin scrapings) as well as their allergenic properties confer upon them a certain degree of importance.2' 3 The present studies were designed to familiarize us with the common fungi that might contaminate our cultures of skin scrapings from pa...

Understanding the environmental conditions of disease transmission is important in the study of vector-borne diseases. Low- and middle-income countries bear a significant portion of the disease burden; but data about weather conditions in those countries can be sparse and difficult to reconstruct. Here, we describe methods to assemble high-resolution gridded time series data sets of air tempera...

Reducing the radiated noise from ships is becoming increasingly important as ship -builders aim to reduce the disturbance to marine life, passengers and crew. A major contributor is on-board machinery which typically radiates noise to the water column from both structure-borne and air-borne transmission paths. Problematic machinery is often decoupled from the hull by supporting it on resilient ...