T h i s chapter describes the des ign, f a b r i c a t i o n , a n d propert ies of mater ia ls that respond to the presence of a chemical species by a change i n their opt ical properties. Ideally, such effects are reversible. They may be detected by conventional methods of absorpt ion, reflection, or luminescence spectrometry, a n d appl ied i n various formats such as test strips and disposa...

OBJECTIVE In this study, we compare a new biological indicator that provides results within 3 hours with four conventional, 48-hour biological indicators and five chemical indicators. DESIGN Biological indicators tested included the conventional Attest 1262, Proof Plus, Assert, and Biosign, and the new Attest 1292 Rapid Readout biological indicator. Chemical indicators tested included Comply,...

background: health-care-associated infections are a major threat to the safety of patient care. control of such problem is a major criterion for hospital accreditation. this study was aimed to determine the developing use of chemical (class 6 products) and biological indicators in tabriz district hospitals since 1997 to 2011. methods: we conducted this time-trend interventional study with all o...

At the 9 meeting of the SBSTTA of the CBD a recommendation was made to begin testing of five biodiversity indicators in order to measure progress towards the 2010 target. This paper considers one of these indicators for Pan-Europe. The basic principle of the index is to calculate the average trend in abundance of a set of ecosystem-representative species. The index is considered to be generic, ...

When comparing the average citation impact of research groups, universities and countries, field normalisation reduces the influence of discipline and time. Confidence intervals for these indicators can help with attempts to infer whether differences between sets of publications are due to chance factors. Although both bootstrapping and formulae have been proposed for these, their accuracy is u...

Background: The rainbow trout fish is susceptible to spoilage due to its high content of unsaturated fatty acids. It should be kept at low temperature to reduce microbial, enzymatic, and oxidation reactions. The purpose of this study was to design a packaging that contains a pH indicator for monitoring freshness of the rainbow trout fish during storage at refrigerator. Methods: The indicator co...