Using High Throughput Experimentation Approach for the Evaluation of Dehydrogenation Catalysts: Potential Interests and Drawbacks — Linear monoolefins with 10 to 14 carbon atoms are intermediates in the manufacture of biodegradable detergent products. These olefins can be obtained industrially by dehydrogenation of long chain paraffins on specific dehydrogenation catalysts under suitable operat...

may have been • mantle plume, but, alternatively, it may have been triggered by an asteroidal impact An impact fall-out layer with shocked debris has been reported at the Tr/J boundary in Italy [13]. The s ynchronicity of extrusion and extinction appear established as an event horizon independent of radiometric or fossil stratigraphy. Of course, enthusiasm for impacts does not score points in t...

Visible light-driven intermolecular electron transfer was observed from a reduced species Ru(bpy)3+, photogenerated via a reductive quenching of the ruthenium photosensitizer by a diethyldithiocarbamate anion, to bioinspired [2Fe2S] model complexes of the iron-only hydrogenase active site. The results indicate that Ru(bpy)32+ can act as a photoactive functional model of the [4Fe4S] cluster, pla...

A new class of oxygen indicators is described. Platinum(II) and palladium(II) complexes of azatetrabenzoporphyrins occupy an intermediate position between tetrabenzoporphyrins and phthalocyanines and combine features of both. The new dyes are excitable in the red part of the spectrum and possess strong room-temperature NIR phosphorescence. Other features include excellent spectral compatibility...

The electrochemical oxidation of 3,7-dimethylxanthine has been studied in the pH range 2.1–10.7 at pyrolytic graphite, platinum and glassy carbon electrodes. The electrooxidation of 3,7-dimethylxanthine at solid electrodes proceeds in a single 4e, 4H+ pH dependent step to give a diimine species which decomposes in chemical followup steps. The UV absorbing intermediate generated during electroox...

Almost all industrial catalysts are heterogeneous, the reaction taking place on a solid surface. During the past decade homogeneous catalysts, soluble in the liquidphase reactant, have received a great deal of attention, although they have so far found only limited industrial use, chiefly because of the di$culty of their separation from the reaction products. More recently an intermediate type,...

background : the brain is a rare site of metastases from ovarian cancer. limited data are available on prognostic factors, standard treatment, and survival. knowledge of clinical prognostic factors would help the management of patients with brain metastases. the aim of this study is to evaluate the impact of clinical factors and treatment modalities on survival in patients with brain metastases...

Understanding the reaction pathways for hydrogen oxidation (HOR) and oxygen reduction (ORR) is key to design electrodes solid acid fuel cells (SAFCs). In general, electrochemical reactions of a cell are considered occur at triple-phase boundary where an electrocatalyst, electrolyte gas phase in contact. this concept, diffusion processes intermediates from catalyst remain unconsidered. Here, we ...

BACKGROUND Ovarian cancer is the fifth most common cancer in the UK, and the fourth most common cause of cancer death. Of those people successfully treated with first-line chemotherapy, 55-75% will relapse within 2 years. At this time, it is uncertain which chemotherapy regimen is more clinically effective and cost-effective for the treatment of recurrent, advanced ovarian cancer. OBJECTIVES ...

OBJECTIVES Assessment of level of exposure to platinum and platinum concentration in urine from platinum industry workers to evaluate internal exposures and excretion kinetics. METHODS Platinum concentrations in urine samples from 34 workers were measured by adsorptive voltammetry after UV-photolysis. Morning and evening samples were taken two to six times during six months. Individual exposu...