摘要:
The travel range is extended for electrostatically actuated micro mirrors used as attenuators, modulators and switches in optical networks by the use of dielectrically coated, preferably with Silicon dioxide, inner surfaces. Oxide charge and oxide capacitance combine to expand the travel range of the mirrors before snap down, at the expense of increased applied bias voltage. This method of travel range extension is preferred over other range extension methods due to its simplicity, reproducibility, and ease of manufacture, as well as benefits of decreased stiction and inhibited electrode shorting. A method for the manufacture of the devices is also disclosed.
摘要:
A bag holder device for retaining a bag in an upright and open position for allowing an individual to fill the bag with debris. The inventive device includes a first support member and a second support member that are extendible into a ground surface. The first support member includes a pair of first legs, a pair of first arm members extending from the first legs, and a first bar member extending between the first arm members. The second support member includes a pair of second legs, a pair of second arm members extending from the second legs, and a second bar member extending between the second arm members. The first bar member and the second bar member are surrounded by a first engaging member and a second engaging member respectively for engaging a paper bag. A first board having first apertures and a second board having second apertures is included for receiving the first support member and the second support member upon hard surfaces such as concrete or asphalt.
摘要:
The invention is an apparatus for aerobically biodegrading an organic compound such as a petroleum product which is contaminating a particulate solid such as soil and a process for employing the apparatus. A preferred embodiment comprises a pit lined with an impermeable liner in which gas distributing means and contaminated soils are distributed as alternate layers and air is urged into the gas distributing means.
摘要:
A process for replacing an aromatic carbon-thallium bond with a carbon-oxygen bond. The process is particularly suitable for producing specific aromatic isomers by thallating an aromatic compound and replacing the thallium with a carboxylate group which can be further hydrolyzed if desired to form an aromatic hydroxyl compound.
摘要:
Vanadium is recovered from sulfuric acid leach liquor by oxidizing the vanadium with hydrogen peroxide in the presence of iron ions and extracting the oxidized vanadium with an amine solvent system.
摘要:
The present invention provides a method of reducing the concentration of recalcitrant organic contamination in a soil matrix. The method includes the steps of incubating the contaminated soil matrix with unacidified ozone sufficient to reduce the concentration of the recalcitant organic contamination in the soil matrix by about 10% to about 15%; and then applying unacidified ozone to the soil matrix sufficient to substantially reduce the concentration of the recalcitrant organic contamination in the soil matrix. During the incubation phase, the ozone demand of competitive, non-contaminant ozone consumers in the soil is satisfied. Additionally, during the incubation phase, ozone conditions the contaminated soil matrix to prepare the recalcitrant organic contamination for subsequent rapid and substantial destruction. When the concentration of the recalcitrant organic contamination has been reduced by from about 10% to about 15% in the soil, the incubation phase has ended such that the application of additional unacidified ozone to the soil matrix rapidly and substantially reduces the concentration of the recalcitrant organic contamination in the soil matrix.
摘要:
The present invention is a process to stimulate the biooxidation of a contaminant in a subterranean formation by introducing an aqueous solution into the formation. The concentration of the hydrogen peroxide is increased thereby acclimating the biota to higher concentrations of hydrogen peroxide. Periodically the concentration of the hydrogen peroxide is increased for a short time sufficiently to be toxic to the biota at or relatively adjacent to the site of introduction, thereby increasing the permeability of the formation at or adjacent to the site of introduction.
摘要:
An aqueous composition has been developed to treat subterranean formations whereby the compositions can maintain for a period of time a sufficient viscosity to function as a hydraulic fluid and optionally to support particulate matter. Subsequently, the viscosity of the composition decreases to facilitate the removal of the composition.
摘要:
A method for preferentially oxidizing sulfide in a viscous, aqueous solution of a hydratable polymeric material suitable for use in hydraulically treating subterranean formations.
摘要:
Vanadium is recovered from acidic solutions by oxidizing the vanadium with Caro's acid to the pentavalent state and obtaining the oxidized vanadium by solvent extraction.