54 results about "Monitoring ph" patented technology

Pharyngoesophageal monitoring systems are provided that monitor the environment of the pharynx and esophagus, and in some embodiments, detect and monitor refluxate, and may further record other physical episode data. The system may be provided, in some embodiments, as a bifurcated, adjustable, multiple internal reference probe, and methods thereof, to detect acid reflux and to monitor pH levels of acid reflux episodes simultaneously at multiple locations within the pharyngoesophageal passage. Some embodiments provide a recorder and one or a plurality of sensor arrangements, the recorder being responsive to the sensors and capable of correlation of signals generated by the sensor arrangements.

The present invention provides ratiometric fluorescent pH sensors for non-invasive, continuous monitoring of pH in such applications as fermentation processes. The ratiometric fluorescent pH sensors comprise a fluorescent dye that exhibits a shift in excitation wavelength with a corresponding shift in pH in the local environment of said fluorescent dye. Ratiometric measurements of the emission intensities at dual excitation maxima correlate to pH. Also provided is a fluorescent dye 6-methacryloyl-8-hydroxy-1,3-pyrene disulfonic acid (MA-HPDS). Further provided are systems and methods to non-invasively and continuously monitor pH.

The invention relates to a preparation method of inverse opal hydrogel photonic crystal with double layer hybridized structure. The preparation method has the advantages that: the raw materials are polyacrylic acid and polyacrylamide which are available, and the preparation method includes two filling gather steps and is simple and practicable; and the polyacrylic acid and polyacrylamide respectively contains carboxyl and amide functional group, thus simultaneously realizing pH and solvent sense response, and the polyacrylamide can be used as internal parameter reference to monitor pH responsecondition when not responding to pH in solution with pH value less than 8.

A system for monitoring a pH level of a sample medium is disclosed herein as including a pH probe having a pH-sensitive electrode, a reference electrode and a temperature electrode arranged within a housing of the pH probe. The probe housing generally includes a flexible inner tube and a flexible outer tube, the inner tube being concentrically arranged within the outer tube. Preferably, a size of the probe housing minimizes the amount of trauma introduced by insertion of the pH probe into physiological tissues, muscles or fluids. The system also includes a processing means, which is coupled to the pH probe for determining the pH of the sample medium. A method of forming a pH-sensitive electrode, a method of manufacturing a pH probe, and a method for using a pH probe are also disclosed herein.

Embodiments of the invention provide amperometric analyte sensor systems comprising a plurality of electrodes including one or more electrodes designed to monitor pH in order to facilitate the sensing of analytes at different pH levels within a sensor environment. Typical embodiments of the invention include glucose oxidase based amperometric sensors used in the management of diabetes.

The invention relates to efficient nitrogen and phosphorus removal device and method for low carbon source municipal sewage and belongs to the technical field of sewage treatment. The method comprises the following steps: alternately caring out anoxic and aerobiotic operations under a condition of real-time control when low carbon source urban sewage enters into a reaction in a progressive decreasing water inlet mode, and fully utilizing limited carbon source organic matters in raw water; carrying out anaerobic phosphorus release and removing the organic matters in a first section: an anaerobic section, and controlling the anaerobic stirring time by monitoring ORP (Oxidation-Reduction Potential) in real time; carrying out denitrification by fully utilizing the organic matters in raw water in the second anoxic sections, and controlling the anoxic stirring time by monitoring pH and ORP values in real time; mainly carrying out aerobiotic phosphorus absorption and short-range nitrification in the third aerobic section, and controlling the aerating time by monitoring the DO (Dissolved Oxygen) and pH value in real time. By accurately judging the reaction endpoints of nitrification and denitrification by real time control, the reaction time is saved, and alternative anoxic and aerobiotic operations are stable to denitrify in a short range for the system, so that the device and method have the advantages of improving the reaction rate, reducing the energy consumption and saving the outer carbon source, efficiently and simultaneously removing phosphorus and nitrogen and the like.

Presteralized manifolds having disposable multifunctional sensors are provided which are designed for sterile packaging and single-use approaches. These manifolds, which have disposable tubing and flexible-wall containers and are adapted to interact with other equipment which can be operated by a controller and a flow-imparting unit, provide automated and accurate delivery or purification of biotechnology fluid. The disposable sensor monitors pH, oxygen and electrical conductivity, alone or in combination, that interact with the controller or are connected to a separate user interface. Disposable sensor components and re-usable components can be dockable with each other.

The invention discloses a method for treating rubbish percolates of different times for deep denitrification by using a bipolar USAB+A/O+SBR process, which belongs to the technical field of biological denitrification and is suitable for performing advanced treatment on the rubbish percolates. In the method, water output by an A/O reactor passes through a secondary sedimentation tank, then part of the water flows back into a first-stage UASB reactor to perform denitrification, so the method fully uses sufficient carbon sources of raw water, realizes an efficient denitrification efficiency, and fully uses the characteristic that the rubbish percolates contain high-concentration organic substances. Dissolved oxygen (DO), an oxidation-reduction potential (ORP) and a pH value sensor are used for monitoring the degradation and the short-range nitrification/denitrification processes of the organic substances in the reactor, and the short-range nitrification/denitrification processes can be well controlled according to monitored pH values and ORP values. The average ammonia nitrogen concentration of final yielding water is 2 mg/L, the total nitrogen concentration is lower than 40 mg/L, and the ammonia nitrogen removal rate and the total nitrogen removal rate are above 98 percent. The method completely depends on biological treatments, reduces the cost and simplifies the process. The method performs denitrification on the rubbish percolates, not only realizes complete nitrification but also realizes short-range nitrification, and realizes the deep removal of the nitrogen in the rubbish percolates.

The invention relates to an anti-corrosion device and a method for a heater drain system of a heat-engine plant. The device comprises a heater and an ammonification pump, an oxygenation pump, a pH sensor and an online oxygen dissolving instrument which are communicated with the heater through a valve on a pipeline, wherein the ammonification pump and an ammonification system are connected, the oxygenation pump and an oxygenation system are connected, and the ammonification pump, the oxygenation pump, the pH sensor and the online oxygen dissolving instrument are all connected on a variable frequency speed regulation control cabinet. The innovation point of the device is as follows: a sensor for monitoring pH and the online oxygen dissolving instrument are installed behind the valve of the heater drain system, thus detecting the hydrophobic pH and oxygen concentration of the heater drain system in real time, and transmitting the hydrophobic pH and oxygen concentration to the variable frequency speed regulation control cabinet at real time so as to control the ammonification pump to add ammonia and oxygen into the hydrophobic system to regulate the pH to be about 9.0 and the oxygen concentration to be about 100mu g/L, being beneficial to maintaining a passive film in the drain system pipeline, and effectively inhibiting flow accelerated corrosion.

The present invention discloses a method for preparing ranitidine bismuth citrate. Said method includes the following steps: making bismuth citrate be suspended in water, adding ranitidine and ammonia water to make reaction, the mole ratio of bismuth citrate, ammonia and ranitidine is 1:1-10:0.9, controlling reaction system pH value and making it be 6-12, its reaction temperature is 4-64deg.C, monitoring pH value, after the pH value is reached to neutrality, stopping reaction, filtering reaction solution and spray-drying so as to obtain the invented ranitidine bismuth citrate.

The invention provides a single-point double-parameter fluorescence optical fiber sensor probe for monitoring a pH value and oxygen partial pressure. The probe comprises an optical fiber probe, a polyurethane hydrogel layer fixed on the optical fiber probe, and pH-sensitive particles and oxygen-sensitive particles dispersed and embedded into the polyurethane hydrogel layer, and is characterized in that the pH-sensitive particles are prepared by covalently fixing HPTS on the amido modified p-HEMA; and the oxygen-sensitive particles are prepared by embedding Ru(dpp)32+ on organically modified silicate by virtue of solvent trichloromethane. According to the probe disclosed by the invention, the problems that cross interference is caused by resonance energy transfer among multiple indicators, photolysis and signal drift of the indicators can be caused by co-existence of the multiple indicators and the like in the traditional sensor can be solved.

The invention belongs to medicament adding technical field, and concretely relates to an intelligent on-line medicament adding system. The system comprises a medicament storage device, a medicament adding pipeline and a control system. The system is characterized in that the medicament adding pipeline includes a medicament conveying pipeline, and the medicament conveying pipeline is provided with a metering pump for adjusting the medicament conveying amount, a PH meter for monitoring PH values and a plurality of valves for controlling the pipeline to be on and off; and the control system includes a PLC core controller, a PID digital-analog controller, a GPRS module, a switch and a DCS controller. On-line acquired analog quantities such as a PH value, a liquid level, flow and temperature are taken as feedback values, a PID mathematic model is established, a fuzzy adaptive control algorithm is optimized, a diagnosis system is established, the medicament adding amount is calculated, then control data is input to the metering pump, and thus the adding amount of medicaments is controlled accurately.

This invention relates to an automatic alkali-feed system monitoring pH value on-line used in environment protection, the character of which is that the sensor and an alkali-feed machine are connected with an automatic setting instrument, in which, the sensor collects pH data and connects them to a data collecting unit of the automatic setting instrument via a special interface to process them by its CPU set in it and transmits related control signals to the alkali-feed machine connected with its special interface, at the same time, the CPU transmits the data to an intelligent monitor by a communication control unit to be uploaded wirelessly to a remote management department. This invention can use a data channel to control 8 sets of automatic alkali-feed machines.

The invention discloses a benzothiazole derivative and a preparation method and application thereof. The derivative is specifically named as 6-(2-(benzothiazolyl-2-yl)vinyl)naphthalene-2-phenol (BTNO). The preparation method comprises the following steps: dissolving 6-hydroxy-2-naphthaldehyde and 2-methylbenzothiazole in a very small amount of dichloromethane, adding trimethylchlorosilane and heating to obtain a crude product; removing a solvent from the crude product and conducting silica gel column separation to obtain a pure product. With decrease of the pH of BNTO from 11.50 to 4.00, fluorescence spectrums have blue shift and exhibit ratio fluorescence emission (F456nm/F526nm) characteristics. At the same time, the advantages of high sensitivity to pH response, good selectivity, high quantum yield and large Stokes displacement and the like can be achieved. In addition, the BTNO acts as a probe to mark cells by permeating cell membranes and can be used for monitoring pH fluctuationswithin the scope of cytoplasm.

A system for descaling heat exchanger surfaces using a varying concentration of either an acidic or alkaline solution, selecting an optimum pH value for descaling a heat exchanger according to the level of cleaning the heat exchanger requires, monitoring pH value of descaling solution during circulation through a heat exchanger, and adding chemical solution to achieve coincidence of optimum and monitored pH values during descaling operation.

The invention relates to a treatment method of high-concentration cyanide and arsenic containing ore pulp in a roasting and pretreating gold smelting plant, and belongs to the field of environmental protection. The treatment method comprises the following steps: adding the high-concentration cyanide and high-concentration arsenic containing ore pulp produced in the roasting and pretreating gold smelting plant into a stirring tank, and sequentially overflowing into the other stirring tanks respectively; inflating high-concentration sulfur dioxide gas produced while roasting, and inflating air from the bottom; monitoring pH values in the stirring tanks; adding ferrous sulfate into the stirring tanks; and performing pressure filtration treatment on the ore pulp discharged from the final stirring tank. By the treatment method, problems of enterprises are solved, environmental risks are reduced, and environmental benefits are significant; the treatment method is simple in flow path, stablein treatment effect, high in pollutant removing rate, low in operation cost and low in one-time investment; and the treatment method has a huge effect of promoting development of the gold industry.

The invention provides an apparatus for simulating circulatory permeation of an acidic solution to simulate erosive permeation of underground water acidic environment upon a test piece; the apparatus comprises: a solution receiving portion that is a rectangular closed container; a test piece receiving portion arranged in the closed container to receive a test piece and comprising a partition, a perforated tray, and a rotary fixing table sequentially from top to bottom, wherein the rotary fixing table is a four-jaw self-rotating fixing table; a solution circulation portion arranged in the closed container and having a solution pump and four universal plastic pipes arranged above the solution pump, wherein the universal plastic pipes are arranged in central symmetry; and a PH monitor portion mounted on the inner wall of the closed container to monitor PH value of the acidic solution. The apparatus of the invention enables a test piece to be permeated by an acidic solution comprehensively and continuously, is simple to operate, and is free of labor consumption, green and pollution-free.