“…Animals are exposed in inhalation chambers to a pre-defined concentration for 4 hours. Absence or presence of compound-related mortality of the animals at one step will determine the next step. …”

“…If the maximum possible losses is estimated to be superior or equal to 50% of the initial concentration over a 30-day period, an experimental study is proceeded in Tier 2. …”

“…First instar chironomid larvae are exposed to at least five concentrations of the test chemical in sediment - water systems. …”

“…Both simple quintile distributions and concentration indices were used to assess horizontal equity, i.e. the extent to which adults in equal need for physician care appear to have equal rates of medical care utilisation. …”

“…The test compound (non-volatile, water soluble, organic, non-inhibitoring to bacteria at the test concentration) and settled domestic sewage are added, and the mixture is aerated for 23 hours. …”

“…At least five different analysable concentrations of the test substance should be used. The recommended maximum test concentration for soluble non-cytotoxic substances is 5 mg/plate or 5 ml/plate. …”

“…Its national economy is already concentrated in cities: almost 65% of China’s GDP was produced in its 53 metropolitan regions in 2004. …”

“…The partition coefficient is defined as the ratio of the equilibrium concentrations of a dissolved substance in a two-phase system consisting of two largely immiscible solvents. …”

“…It finds that terms of trade, export concentration, and export prices have a significant impact on the exchange rate level and volatility. …”

“…In fact, different market segments show very different degrees of concentration and several conditions for a competitive market are missing. …”

“…Males and females are always tested, but they may be exposed at different concentration levels if it is known that one sex is more susceptible to a given test chemical. …”

“…Males and females are always tested, but they may be exposed at different concentration levels if it is known that one sex is more susceptible to a given test article. …”

“…Biodegradability is calculated on the basis of BOD and supplemental chemical analysis, such as measurement of the dissolved organic carbon concentration, concentration of residual chemicals, etc. …”

“…All too often debugging books concentrate solely on the tools but this book avoids that pitfall by concentrating on examples. …”

“…Air pollution is a mixture of particles and gases, which can reach unsafe concentrations for human health, the environment, vegetation, and materials. …”

“…This book is a preliminary study, commencing with an overview of the excavations, and followed by studies concentrating on physical, historical and archaeological aspects. …”

“…A journal of the International Communication Association, 'Human Communication Research' concentrates on presenting the best empirical work in the area of human communication…”

“…The test results may also serve as an indicator of suitable non-inhibitory concentrations of test substances to be used in biodegradability tests. …”

“…This book addresses a number of relevant aspects related to coatings for renewable energies, including a deep survey of coatings used in photovoltaic solar energy, the development of a superhydrophobic and thermal stable silica coating that is potentially suitable for various industrial applications related to renewable technologies, the development of coatings to improve the resistance of structural materials used in concentrating solar thermal technologies with molten salts, and several research works related to solar reflectors for concentrating solar thermal technologies (such us the advanced analysis of the corrosion, the suitability of anti-soiling coatings, and the development of top protective coatings for high-temperature secondary concentrators)…”

“…De jeunes daphnies, âgées de moins de 24 heures au début de l'essai, sont exposées à une gamme des concentrations de la substance d'essai (au moins cinq concentrations) pendant une période de 48 heures. …”