摘要:
Substituted indolyl compounds of the formula ##STR1## are potent inhibitors of the lipoxygenase enzymes and are useful as agents for the treatment of allergies and inflammatory disease states.
摘要:
Substituted indolyl compounds of the formula ##STR1## are potent inhibitors of the lipoxygenase enzymes and are useful as agents for the treatment of allergies and inflammatory disease states.
摘要:
It has been found that bis(2-benzylaminoethyl)-disulfides with the phenyl rings carrying various simple substituents, are highly effective anti-inflammatories and inhibit chemotaxis of human neutrophils.
摘要:
A waste processing system is provided herein which entails the use of at least one fixed-position plasma arc generator for primary processing and at least one moveable plasma arc generator for secondary processing assistance and/or final conditioning of the slag prior to exit from the reactor vessel. This optimum processing environment is provided by control of reactor vessel configuration and real time control of processing characteristics to ensure maximum processing efficiency.
摘要:
A waste disposal system for gasification and melting of various waste materials such as solid waste, waste in a solid container, granular waste, and liquid waste, and mixtures thereof. The system includes a reactor vessel which is closed to the atmosphere, and also includes a bottom portion capable of serving as a slag pool. An active feed mechanism eliminates the entry of air from the atmosphere into the vessel and also blocks the expulsion of by product gases into the atmosphere. The feed mechanism includes mechanisms to feed solid waste, waste in a solid container, granular waste and liquid waste into the reactor vessel. A plasma arc torch is located for plasma arc activity within said reactor vessel to produce a high temperature processing zone to gasify or melt solid waste, waste in a solid container, granular waste, and liquid waste and mixtures thereof as such waste is actively fed into the reactor vessel. In preferred embodiments a waste receiving reservoir is located within the vessel and positioned to initially receive and retain waste from the active feed mechanism for thermal decomposition and melting of the waste by the arc torch.
摘要:
A plasma arc torch is used as an independent heat source in an enclosed reactor vessel to gasify municipal solid waste and produce a medium quality gas and an inert monolithic slag having substantially lower toxic element leachability. The gas has lower levels of metals and semi-volatile organic compounds, particularly dioxins and furans. Other materials may also be gasified, for example, coal, wood and peat.
摘要:
In a VHF tuner for a television receiver including a varactor controlled local oscillator (LO), a field effect transistor (FET), arranged as a mixer for generating an IF signal in response to RF and local oscillator signals, is biased with respect to the amplitude of the local oscillator signal corresponding to channel 6 to inhibit the development of intermodulation and cross-modulation products which tend to manifest themselves at channel 6 and to provide a suitably large conversion gain at channel 6. A varactor diode is coupled in serial fashion between the varactor controlled LO and the FET and is controlled in response to the tuning voltage, normally utilized to control the frequency of oscillation of the LO, to couple signals to the FET from the LO having approximately the same amplitude as the amplitude of the signal coupled to the FET from the LO at channel 6 throughout the low VHF band including channels 2-6 so as to substantially maintain the combination of desired mixer bias and mixer input signal throughout the low VHF band.
摘要:
Spent potliner from aluminum reduction cells includes carbon, inorganic brick and refractory material, and fluoride, sulfur, and cyanide compounds, and is considered hazardous. It is treated by introducing it into a vessel, and exposing it to the heat of a plasma torch at a temperature of at least 1000.degree. C. As a result, carbon is gasified and converted to combustible carbon monoxide or hydrocarbons, or to carbon dioxide; inorganic material is melted form slag; fluoride compounds are melted, vaporized, or reduced to gaseous HF; cyanide compounds are destroyed; and all other materials, including sulfur compounds, are either melted or gasified. As a result, the spent potliner is rendered non-hazardous, and the quantity of remaining slag has both its solid volume and mass substantially reduced by a factor of at least 1.5:1 in mass and at least 3:1 in volume relative to the input spent potliner. The process allows gaseous fluoride compounds to be captured and thermal energy produced in the process to be extracted. The molten slag material produced within the vessel is removed from the vessel, and cooled to form a solid slag which is substantially free of cyanide compounds, resistive to leaching, and safe for disposal. The slag has commercial utility. Combustible carbon compounds can be captured and used. When carried out at an aluminum smelting site, adequate electrical power is readily available, and there is an in situ demand for recovered fluoride compounds, combustible gases, and extracted heat.
摘要:
A tuner for a television receiver includes a voltage controlled local oscillator for tuning VHF channels comprising a transistor arranged in a common base amplifier configuration and a parallel tuned circuit including a varactor diode responsive to a tuning voltage and a first inductor configuration for the low VHF band and a second inductor configuration for the high VHF band connected between the collector and emitter electrodes of the transistor. A second varactor diode also responsive to the tuning voltage is connected between the emitter and base electrodes of the transistor to expand the range of the local oscillator in its high VHF configuration to permit tuning of channels in a midband cable band between the low and high VHF bands without the need for a third inductor configuration.