In some additional aspects, an apparatus can include a chamber having an inlet valve for receiving a reactant gas and an outlet valve for delivering a product gas, a piston positioned inside the chamber and configured to move along a length of the chamber for adjusting pressure in the chamber, a sensor for collecting information related to one or more conditions of a respiratory system associated with a patient, a controller for determining one or more control parameters based on the collected information, and one or more pairs of electrodes positioned inside the chamber for initiating a series of electric arcs external to the patient to generate nitric oxide based on the determined control parameters.

A nitric oxide generator generates nitric oxide from a mixture of nitrogen and oxygen such as air treated by a pulsating electrical discharge. The desired concentration of nitric oxide is obtained by controlling at least one of a frequency of the pulsating electrical discharge and duration of each electrical discharge pulse.

An aseptic and odorless nitric oxide generator according to the present invention removes harmful materials such as ozone (O.sub.3), nitrogen dioxide (NO.sub.2) and the like, which are generated during discharge from a high-voltage discharge unit, by contacting the same with respective catalysts at a catalytic reaction unit, reduces noise, which is generated in a discharging process, by using a sound-absorbing material provided inside an exhaust pipe, and receives measured data from respective sensors provided inside the exhaust pipe so as to allow a control unit to execute and automatically operate a feedback control, thereby supplying and circulating indoors the air containing aseptic and odorless high-quality nitric oxide, and thus is very appropriate for the nitric oxide absorption by a person residing indoors through the mouth, the skin and a breathing process.

An apparatus for treating a biologic object includes a device for forming NO-containing gas flow to treat the biologic object and a plasma cooling mechanism coupled to a distal end of the device. The plasma cooling mechanism may include a cooling member and/or a cooling apparatus. The cooling member is coupled to a distal end of the device and includes a fluid conduit and a cooling chamber surrounding the fluid conduit. The cooling apparatus is coupled to a distal end of the cooling member so that the NO-containing gas flow travels from a discharge aperture formed in the device through the fluid conduit and passed the cooling apparatus before reaching the biologic object.

A nitric oxide generator generates nitric oxide from a mixture of nitrogen and oxygen such as air treated by a pulsating electrical discharge. The desired concentration of nitric oxide is obtained by controlling at least one of a frequency of the pulsating electrical discharge and duration of each electrical discharge pulse.

A nitrogen-enriched water generator includes an elongated housing defining a sealed nitrogen/oxygen chamber in which nitrogen molecules are combined with oxygen molecules to form a nitrate (NO.sub.3) or a nitrite (NO.sub.2) gas (NOx gas). The housing includes an NOx gas and water mixing tube, a plasma generator and a nitrogen-enriched water trap. A water spray nozzle sprays water into the chamber. At least one air injection port injects air into the chamber. A vacuum port removes a volume of NOx gas not absorbed by the water from the sealed nitrogen/oxygen chamber.

A nitric oxide generator generates nitric oxide from a mixture of nitrogen and oxygen such as air treated by a pulsating electrical discharge. The desired concentration of nitric oxide is obtained by controlling at least one of a frequency of the pulsating electrical discharge and duration of each electrical discharge pulse.

A high-purity NO.sub.2 gas generation apparatus, according to the present invention, comprises: an ozone gas generator; a nitrogen oxide gas generator containing NO; and a mixing unit for mixing ozone from the ozone gas generator and gas from the nitrogen oxide gas generator. Gas containing NO.sub.2 from the high-purity NO.sub.2 gas generation apparatus may be supplied to an apparatus for producing high-concentration activated water and fertilizer water. The apparatus for manufacturing high-concentration activated water and fertilizer water, according to the present invention, comprises: an upright cylindrical column forming a flow path in the longitudinal direction; a water supply unit positioned above the column and supplying water to the flow path; a gas supply unit positioned below the flow path and supplying gas containing NO.sub.2 gas; and a discharge port positioned at the lower end of the flow path and discharging a fluid.

A device for generating and delivering Nitric Oxide (NO) to a treatment site includes a main unit, an applicator, a connector hose, and a mobile stand. The main unit provides power and a gas to the applicator via the connector hose. The applicator includes a plasma generator for generating NO in a plasma state. The main unit including a user interface to enable a user to control at least one operational aspect of the device. The applicator includes a pistol grip handle, a trigger for actuating the plasma generator, a hose connection for coupling to the connector hose, and a cowl portion for spacing a tip of the plasma generator at a predetermined distance from a treatment site. Sensors are provided with the applicator for sending feedback and monitoring application site temperature, proximity to the application, applicator motion and the like.

The present invention provides a low pressure generating plasma reactor closed loop process, comprising: feeding a fresh feed gas flow and a fresh feed absorption liquid flow to a plasma reactor closed loop comprising a condenser, a liquid loop, a recycle gas loop, and a plasma generator; converting feed gas to reactive plasma products in the plasma generator; quenching and absorbing the reactive plasma products into an absorption liquid circulating in the liquid loop where the reactive plasma products react to form liquid reaction products, thereby generating low pressure in the closed loop; monitoring the composition and low pressure of the recycle gas loop and, if the pressure increases, adjusting the composition of the fresh feed gas flow and/or fresh feed absorption liquid flow to bring the composition of the feed gas towards stoichiometric ratio with the absorbed reactive plasma products; extracting circulating absorption liquid, containing the liquid reaction products, from the plasma reactor closed loop as a product flow. The present invention also provides a low pressure generating plasma reactor closed loop system, comprising a plasma generator, a condenser, a recycle gas loop, a liquid loop, and a pump.