The development of porphyrin-embedded mesoporous organosilicate materials for application to the detection of volatile hydrocarbon solvents is described. Design of the receptor and optical indicator construct begins with parallel selection of the porphyrin indicator and design of the mesoporous sorbent. For the porphyrin indicator, high binding affinity and strong changes in spectrophotometric ...

Doped Bi-based oxides were investigated as potential anode materials for direct hydrocarbon solid oxide fuel cells ~SOFCs! at intermediate temperatures. (Bi2O3)0.85(Ta2O5)0.15 met this criterion most successfully. A fraction of Bi2O3 in this material was reduced to BiO and Bi metal under fuel conditions, which yielded high conductivities ~,1 S cm! based on oxide ions and electrons above 500°C. ...

The photochemical C-H activation reactions of eta(3)-TpRh(CO)(2) (Tp = HB-Pz(3), Pz = 3,5-dimethylpyrazolyl) and CpRh(CO)(2) (Cp = C(5)H(5)) have been studied in a series of linear, cyclic, and aromatic hydrocarbon solvents on a femtosecond to microsecond time scale. These results have revealed that the structure of the hydrocarbon substrate affects the final C-H bond activation step, which is ...

We synthesize impediments for evaluating effects to seabirds from open ocean hydrocarbon releases. Effects on seabirds from ship discharges, spills, and well blowouts often are poorly detected and monitored far from land. Regulatory regimes for ocean spills can result in monitoring efforts that are not entirely transparent. We illustrate how interdisciplinary technologies address deficits that ...

Terpenes are the largest group of natural products with important and diverse biological roles, while of tremendous economic value as fragrances, flavours and pharmaceutical agents. Class-I terpene synthases (TPSs), the dominant type of TPS enzymes, catalyze the conversion of prenyl diphosphates to often structurally diverse bioactive terpene hydrocarbons, and inorganic pyrophosphate (PPi). To ...

A scheme for NH2 detection by means of laser-induced fluorescence (LIF) with excitation in the ultraviolet-blue regime around 385 nm, in particular using the second harmonic of a solid-state Alexandrite laser, is presented. This alternative provides interference-free detection with improved signal compared with previously employed concepts based on Nd:YAG and dye-laser excitation in the visible...

The Mayuan Zn-Pb deposit on the northern margin of Sichuan Basin is rich in resources. Additionally, a large amount bitumen observed outcrops, and these deposits represent key template for exploring migration hydrocarbon fluids metal elements within an ancient oil reservoir. In this study, chemical experimental method was used to extract adsorbed from chosen five groups samples, mathematical st...