Electrochemical synthesis at pre-pilot scale of 1-phenylethanol by cathodic reduction of acetophenone using a solid polymer electrolyte

The pre-pilot scale synthesis of 1-phenylethanol was carried out by the cathodic hydrogenation of acetophenone in a 100 cm2 (geometric area) Polymer Electrolyte Membrane Electrochemical Reactor. The cathode was a Pd/C electrode. Hydrogen oxidation on a gas diffusion electrode was chosen as anodic reaction in order to take advantage of the hydrogen evolved during the reduction. This hydrogen oxidation provides the protons needed for the synthesis. The synthesis performed with only a solid polymer electrolyte, spe, has lower fractional conversion although a higher selectivity than that carried out using a support–electrolyte–solvent together with a spe. However, the difference between these two cases is rather small and since the work-up and purification of the final product are much easier when only a spe is used, this last process was chosen for the pre-pilot electrochemical synthesis of 1-phenylethanol.

Central Africa: on a scale of 1:10,000,000

by Dr. F. Boas.

Core correlation data and revised composite depth scale of Exp302 (ACEX) cores

Expedition 302 of the Integrated Ocean Drilling Program (IODP), also known as the Arctic Coring Expedition (ACEX), successfully penetrated a sequence of Cenozoic sediments draping the crest of the Lomonosov Ridge in the central Arctic Ocean. The cumulative sedimentary record spans the last 57 m.y. and was recovered from three sites located within 15 km of each other. Merging the recovered cores onto a common depth scale that accurately reflects their stratigraphic placement below the seafloor is a fundamental step toward interpreting this unique sedimentary record. However, the lack of overlapping recovery in adjacent holes and intervals of high core disturbance complicated traditional methods of stratigraphic correlation. Here we present a revised composite depth scale for the ACEX sediments, generated in part by performing a regional stratigraphic correlation with sediments recovered from previous expeditions to the Lomonosov Ridge. The revised depth scale also reassesses the offsets for cores in the upper 55 meters below seafloor, where no overlapping recovery was acquired, and proposes modifications to these depths.

Driver understanding of work zone flagger signals and signaling devices. Interim report.

Texas State Department of Highways and Public Transportation, Transportation Planning Division, Austin

The musical scale of the Arabs. Medieval organ pipes and their bearing on the history of the scale. The natural diatonic scale.

From the Proceedings of the American Association for the Advancement of Science, v. 48, 1899.

Propagation of temperate-zone fruit plants /

Mode of access: Internet.

Realisation of absolute scale of temperature.

Reprinted from vol.1 of "The dictionary of applied physics."

The scale of the universe, by Harlow Shapley ... and Heber D. Curtis.

Mode of access: Internet.

Visibility requirements of work zone traffic control devices. Final report.

Federal Highway Administration, Office of Research and Development, Washington, D.C.

Crash tests of construction zone traffic barriers. Second interim report.

Federal Highway Administration, Office of Research, Washington, D.C.

Union scale of wages and hours in the building trades in 70 cities: May 15, 1937/

Mode of access: Internet.

Construction costs and safety impacts of work zone traffic control strategies.

"December 1989."

Sulfuric acid digestion of leached zone /

Work performed at the International Minerals and Chemical Corporation under Contract AT(49-1)-545 with the U.S. Atomic Energy Commission.