The synthesis of citronellal, an added-value chemical for perfumery, was performed through selective and green hydrogenation citral into citronellal in water. Aqueous suspensions spherical ammonium-capped palladium nanoparticles with sizes around 3 nm selectively reduced the conjugated carbon–carbon double bond. An excellent selectivity up to 97% achieved at complete conversion presence potassi...

Quantitative determination of Brønsted acid sites in acidic mordenite samples with varying proton concentrations has been studied using aqueous conductometric titration method. Conductometric titration of the ammonium form of mordenite with sodium hydroxide is feasible and the results indicate potential number of Brønsted acid sites. However, Brønsted acid sites concentration in acidic mordenit...

Materials-The pigeon liver extract preparation and the substrates required for the synthesis of glycinamide ribotide have been described previously (l-4). Intestinal phosphatase, purified grade, was obtained from Pentex, Inc., Kankakee, Illinois. Adenosine-5’-phosphate was obtained from the Ernst Bischoff Company, Inc., Ivoryton, Connecticut. Adenosine-3’-phosphate was obtained from the Schwarz...

National Institute for Occupational Safety and Health method 7703 is a portable field procedure for the analysis of workplace air filter samples for hexavalent chromium (CrVI) content immediately after the samples are collected. The field method prescribes CrVI extraction from air filter samples with an ammonium sulfate/ammonium hydroxide extraction buffer using ultrasonic extraction (UE). Stro...

Institut Agronomique, Universit6 de Louvain, H~verl6-Louvain (Belgium) ABSTRACT MO~TTMOm~LLONrrE may adsorb cobalt(III)hexammine and cobalt(III)chloropentammine cations, and the C.E.C. determined for these complex cations is of the order of magnitude of that obtained with ammonium. The infrared spectra of these coordination complexes adsorbed by the clay are similar to those observed for the co...

Materials-The pigeon liver extract preparation and the substrates required for the synthesis of glycinamide ribotide have been described previously (l-4). Intestinal phosphatase, purified grade, was obtained from Pentex, Inc., Kankakee, Illinois. Adenosine-5’-phosphate was obtained from the Ernst Bischoff Company, Inc., Ivoryton, Connecticut. Adenosine-3’-phosphate was obtained from the Schwarz...

Biologic substrates, prepared by decellularizing and solubilizing tissues, have been of great interest in the tissue engineering field because of the preservation of complex biochemical constituents found in the native extracellular matrix (ECM). The integrity of the ECM is critical for cell behavior, adhesion, migration, differentiation, and proliferation that in turn affect homeostasis and ti...

The (32)P-post-labelling assay has emerged as a major tool for detecting bulky DNA adducts in subjects exposed to carcinogens, especially aromatic compounds. However, the (32)P-post-labelling protocol still requires the use of high amounts of radioactivity, i.e. 25-50 muCi per sample, an obstacle that limits its use in large studies. The characterization of the DNA adducts measured is also limi...