Detectability index

To probe the formation of coke we conducted TPO measurements on samples previously used in the butene TPD experiments. The TPO profiles corresponding to catalyst INiSZ(s) are shown in Fig. 6. Significant evolution of CO2 was detected, indicating the formation of coke during the adsorption/desorption of 1-butene. The INiSZ(s) catalyst exhibited almost twice as much CO2 as the unpromoted SZ sample. 

The two OH-PBDEs detected indicate that the degradation pathway of octa-BDE and penta-BDE mixtures by the fungus corresponds, in both cases, to a hydroxyl-ation of the PBDE compounds. In the case of deca-BDE mixture, it was not possible to detect any hydroxylated product, but it cannot be excluded the formation of OH-PBDEs and their subsequent degradation for a time lower than 24 h. Therefore, it is possible that deca-BDE degradation by the fungus also occurs through the progressive hydroxylation of the compound, but it would be necessary to have results from treatment times of 12 h to confirm this possibility. 

Optical sensors rely on optical detection of a chemical species. Two basic operation principles are known for optically sensing chemical species intrinsic optical property of the analyte is utilized for its detection indicator lor label) based sensing is used when the analyte has no intrinsic optical property. For example, pH is measured optically by immobilizing a pH indicator on a solid support and observing changes in the absorption or fluorescence of the indicator as the pH of the sample varies with time1 20. 

Small amounts of 1-methylnaphthalene (0.6 wt %) and 1-methyltetralin (0.2 wt %) were detected, indicating some migration of the CH3 group from the two to the one position. Some isomerisation of 2-methyltetralin through the mediyltetralyl radical was indicate by the formation of the dimethylindan derivative (3.8 wt %). 

Lubiprostone has used as a novel PG compound for an oral treatment of constipation with a unique action directed to the target tissue, although it has low systemic availability following oral administration. It activates a locally acting chloride channel, which is a normal constituent of the apical membrane of the human intestine, and enhances a chloride-rich intestinal fluid secretion without altering sodium and potassium concentration in the serum. In fasted rats administered doses of 1, 10, or lOOpg/kg of the compound, dose-dependent increases in the concentration of chloride ions in the bowel were detected, indicating that the compound opens chloride channels and promotes chloride ion transport in vivo [45]. 

The notion of atoms arrived in the East, ancient India, prior to its appearance in the West, the ancient Mediterranean (Greek) world. Both societies were polytheistic, and philosopher-chemists dominated the study of chemistry. Atomic concepts were based upon philosophical considerations and not experimental observations. No exchange on atomism between these two regions in this ancient time has been detected, indicating that these concepts were developed independently ). These developments occurred dming Period I of the Ancient Regime of Chemistry (—10,000 BCE - —100 BCE), which may be called the... 

See under COAL MINE EXPLOSIONS AND FIRES. The Corpse light is used to detect indicate the presence of firedamp which occurs in coal mines... 

DNB is more resistant to sonolysis than NB. Because the production of byproducts does not track the disappearance of DNB, volatility is the primary mode of DNB loss. The poor solvation of DNB by water as well as the large solution surface area allows rapid volatility. Because NB is more soluble in water, it remains available for sonolysis longer and produces a wider variety of by-products than sonolysis of DNB therefore, organic compounds that are less soluble in water will be more difficult to effectively treat by sonolysis unless steps are taken to increase the presence of the contaminant in the irradiation zone. It is also noted that a higher irradiation frequency is more efficient for sonolysis. More intermediates are observed at shorter irradiation time than with a lower ultrasonic frequency. In addition, a different subset of intermediates was detected, indicating alternate sonolytic pathways are followed. 

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