43results about How to "Lower concentration levels" patented technology

Systems and methods for preserving a perishable material sensitive to oxygen and bacterial spoilage are taught. The systems in some embodiments comprise a pressurized source of a first gas other than oxygen and a container for the perishable material, the container having a sealable lid, a passage including a one-way valve through the lid connected by a gas conduit to the pressurized source, and a mechanism for venting the container. In various embodiments oxygen exposure to the perishable material in the container is diluted by at least one cycle of pressurizing the container with the first gas other than oxygen, and then venting the container. In some embodiments oxygen dilution is by vacuum.

An LDMOS transistor includes a gate insulation film formed on a semiconductor substrate, a gate electrode formed on the gate insulation film, a drain well of a first conductivity type formed in the substrate so as to include a gate region covered with the gate electrode, a channel well of a second conductivity type formed in the drain well in a partially overlapped relationship with the gate region, a source region of the first conductivity type formed in the channel well in an overlapping manner or adjacent with a side surface of the gate electrode, a medium-concentration drain region of the first conductivity type having an intermediate concentration level and formed in the drain well at a side opposing to the source region in a manner partially overlapping with the gate region, the medium-concentration drain region being formed with a separation from the channel well, a drain region of the first conductivity type formed in the medium-concentration drain region with a separation from the gate region, a low concentration well of the second conductivity type formed inside the drain well so as to include at least a part between said channel well and the medium-concentration drain region.

The invention discloses a solidification and stabilization method for a hazardous waste containing toxic organic compounds, which belongs to the hazardous waste treatment technical field of environment protection. According to a dry weight ratio, 30 to 60 percent of the hazardous waste containing toxic organic compounds, 0.5 to 10 percent of an additive, 30 to 60 percent of inorganic cementing agent and curing agent are added into an agitator and are stirred by adding water, meanwhile, a gas internal circulation device is started, the gas in the agitator is adsorbed and purified by a gas adsorbing and purifying device, and then part of the gas is fed back into the agitator; after being evenly mixed and stirred materials are discharged, solidified and fed into a maintenance house, and the solidification and stabilization of the hazardous waste containing toxic organic compounds is finished. The additive comprises an adsorbent with adsorbing effect and a structural modifier which can improve the structural performance of a product, such as activated carbon, water glass, calcium chloride, etc. The inorganic cementing agent and curing agent refers to hydraulicity cementing material. The solidification rate of the invention can reach more than 90 percent; and gas circulation can reduce polluted gas discharging, thus being capable of effectively reducing the occurrence of secondary pollution.

The invention discloses a control method of fresh air equipment, the fresh air equipment and a readable storage medium. The method comprises the steps that the user number and the pollutant concentration value of the area where the fresh air equipment is located are confirmed; if the user number is smaller than or equal to the preset number, the first fresh air quantity is obtained according to the preset per capita fresh air demand quantity, the user number and the pollutant concentration value; and the fresh air equipment is controlled to run according to the first fresh air quantity, so that the fresh air quantity of the area where the fresh air equipment is located is adjusted. The accuracy of adjusting the fresh air quantity of the fresh air equipment is improved, and the air qualityof area where the fresh air equipment is located is guaranteed.

A method of reducing the concentration of a chemical or drug substance in the blood plasma that targets the same or similar receptors as the normal neurotransmitters in the central or peripheral nervous system includes titrating an initial peak concentration of the chemical or drug substance in the blood for a predefined dosing period, titrating a lowest concentration level of the chemical or drug substance in the blood immediately before the end of the dosing period, and providing a plurality of subsequent dosing periods where each subsequent dosing period requires administration of a dosing amount of the chemical or drug substance and titrating of the peak concentration and the lowest concentration level to ensure that the lowest concentration level of the chemical or drug substance in the blood plasma for the subsequent dosing period is decreased by not more than five percent of the lowest concentration level of the previous dosing period and where the plurality of dosing periods added together extends the method for seventy days or more.

A mineral acid detection tape includes a cellulose paper substrate saturated with a formula solution and provides an extended life detection tape of at least a three-month period of time when place in service.

The invention discloses a sheet irrigator for flood diversion and drip irrigation. The irrigator comprises an upper shell body and a lower shell body, wherein the lower shell body is matched with the upper shell body, the upper shell body is a closed shell body, a plurality of water inlet grids are arranged at the top of the upper shell body, at least a row of water outlet grids are arranged at the bottom of the upper shell body, an inserting plate is arranged on the bottom of the upper shell body, which is close to the water outlet grids, and extends towards a direction away from the upper shell body; the lower shell body is provided with an opening at the top, a groove body is arranged in the lower shell body at a position corresponding to the inserting plate, and is matched with the inserting plate, a space is arranged between the groove body and one end of the lower shell body; a water inlet flow passage is arranged in the lower shell body at a position corresponding to the water outlet grids, and extends towards the other side of the groove body through the space; a water outlet of the water inlet flow passage is communicated with at least one silt presedimentation tank, the water outlet of the silt presedimentation tank is communicated with an energy dissipation flow passage; and a water outlet hole is arranged on the bottom of the lower shell body, which is close to thewater outlet of the energy dissipation flow passage. The sheet irrigator can be used for effectively solving the problem of synchronous improvement on hydraulic performance and anti-clogging performance of the irrigator, and is applicable to a flood diversion and drip irrigation system with self-adaptive regulation and control capacity.

The invention discloses an OLED leucoderma therapeutic instrument. The OLED leucoderma therapeutic instrument comprises a leucoderma therapeutic end and a power source driving device, wherein the leucoderma therapeutic end comprises an OLED light source used for emitting a red light source. The OLED leucoderma therapeutic instrument is advantaged in that an OLED is taken as a therapeutic light source, red light emitted by a red light emission unit is employed, repair cream is further cooperatively utilized to effectively stimulate melanin cells to secrete melanin, a concentration level of hydrogen peroxide of leucoderma skin is reduced, and thereby leucoderma therapeutic operation is carried out.

The invention relates to an auxiliary material used for injection or oral administration. Basic component of the surface active agent is polyoxyethylene sorbitan (mono)oleate, wherein total content of carbonyls contained in aldehyde compounds and one compounds is not more than 20meq/kg, or/and total content of epoxy groups is not more than 10meq/kg, or/and total content of alkane compounds and olefin compounds is not more than 10meq/kg, and total content of peroxyl groups contained in peroxides is not more than 20meq/kg. The auxiliary material has relatively high safety and is used for improving safety and/or stability of a preparation used for injection or oral administration. In addition, the invention also relates to a preparation method and quality standard of the auxiliary material.

A hot oxygen stream containing radicals is fed into an offgas stream from a steelmaking vessel to convert carbon monoxide in the offgas to carbon dioxide.

A carbon monoxide treatment apparatus according to an exemplary embodiment of the present invention includes: a reactor body; a partitioning plate located inside the reactor body for partitioning an internal space of the reactor body into a first section and a second section; a channel member in the first section for transporting an introduced gas including a reformed gas and an oxidant gas to the second section; and a reaction unit around the channel member of the first section for reducing a concentration level of carbon monoxide in the introduced gas moving through the first section by utilizing a preferential oxidation reaction of the carbon monoxide and the oxidant gas of the introduced gas, wherein moisture of the introduced gas that has been partially condensed when passing through the channel member is stored in the second section.

The invention relates to the technical field of water treatment, particularly to a method for removing chlorate in electrolytic circulating light salt brine. The method comprises the following step: adding acetaldehyde into electrolytic circulating light salt brine without adding sulfite. The process provided by the invention has the advantages of high decomposition efficiency, low consumption andsimple process.