摘要:
A method of recovering in highly pure states heavy metals such as cobalt, manganese, etc., and bromine without the contamination of organic impurities and heavy metal impurities from the residue of the reaction mother liquor, which is obtained by removing a solvent from the reaction mother liquor remained after recovering terephthalic acid from the oxidation reaction product obtained in the method of producing terephthalic acid by subjecting an alkylbenzene such as p-xylene to a liquid phase oxidation with oxygen or oxygen-containing gas in the presence of a catalyst containing the heavy metals and bromine using a lower aliphatic monocarboxylic acid as the solvent, said method comprising: stirring the residue of the reaction mother liquor with water as solvent in the presence of molecular oxygen and a sulfur compound, removing solid impurities from the extracted mixtures thus treated by solid-liquid separation to provide an aqueous catalyst extract solution, passing the aqueous solution through a column packed with a strongly acidic cation-exchange resin to adsorb thereon the heavy metal catalyst, distilling the solution thus passed through the ion-exchange resin to recover bromine contained in the aqueous extract solution as hydrobromic acid, and, on the other hand, passing hydrobromic acid through the column of the ion exchange resin having adsorbed thereon the heavy metal catalyst to desorb the heavy metal catalyst, whereby the heavy metal catalyst is recovered as the bromide of it.
摘要:
An examination apparatus measures the oxygenation of body organs by using the near infrared transmission spectrophotometry. To assure the measurement reliability and the object person's safety, the examination apparatus monitors the variation of the fitting position of an illumination-side fixture by detecting the reflection light quantity from the measuring object.
摘要:
A concentration measurement apparatus measures a temporal relative change amount (ΔcHb, ΔO2Hb) of either or both of total hemoglobin concentration and oxygenated hemoglobin concentration in the head that vary due to repetition of chest compression, and includes a light incidence section making measurement light incident on the head, a light detection section detecting the measurement light propagated through the interior of the head and generating a detection signal in accordance with the intensity of the measurement light, and a CPU determining, based on the detection signal, the relative change amount (ΔcHb, ΔO2Hb) and performing a filtering process of removing frequency components less than a predetermined frequency from frequency components contained in the relative change amount (ΔcHb, ΔO2Hb).
摘要:
Perform measurement of blood flow using physiological salt solution, which is harmless to living objects, as a tracer. The head portion (4) of a subject is alternately irradiated with laser light 1, and laser light 2. The light exiting from the head portion (4) is detected and converted to an electric signal. By performing a first calculation on this electric signal, a CPU (1) outputs a signal representing the change in concentration of hemoglobin in the head (4). Further, a second calculation process is performed on the electric signal which represents changes in concentration of hemoglobin generated by injection of the physiological salt solution. At least one of the blood flow or the absolute concentration of oxyhemoglobin and deoxyhemoglobin is displayed. Because a material safe to living objects is used as the tracer, measurement of the blood flow can be safely and repeatedly performed.
摘要:
An examination apparatus measures the oxygenation in body organs by the near infrared light transmission spectrophotometry. To inspect the examination apparatus itself before the oxygenation measurement, an illumination-side fixture and a detection-side fixture have such structures that these fixtures can be assembled together in such a manner that near infrared light is directly made incident on the detection-side fixture from the illumination-side fixture. In the midst of the measurement, the examination apparatus is regularly inspected and a photomultiplier tube can be separately inspected by employing a separate light source for inspection.
摘要:
An examination apparatus which measures the oxygenation in objects with near infrared light transmission spectrophotometry and that automatically adjusts a transmission light quantity to a magnitude suitable for detection by a photomultiplier tube. The examination apparatus comprises a ring-like ND filter whose transmission factor varies along its circumference, a filter driver for automatically setting a transmission factor of a filter, and a light source control device for automatically controlling output powers of light sources.
摘要:
A concentration measurement apparatus measures a temporal relative change amount (ΔcHb, ΔO2Hb) of either or both of total hemoglobin concentration and oxygenated hemoglobin concentration in the head that vary due to repetition of chest compression, and includes a light incidence section making measurement light incident on the head, a light detection section detecting the measurement light propagated through the interior of the head and generating a detection signal in accordance with the intensity of the measurement light, and a CPU determining, based on the detection signal, the relative change amount (ΔcHb, ΔO2Hb) and performing a filtering process of removing frequency components less than a predetermined frequency from frequency components contained in the relative change amount (ΔcHb, ΔO2Hb).
摘要:
An examination apparatus for measuring the oxygenation in body organs by the near infrared light transmission spectrophotometry. The invention relates to an improvement of an illumination-side fixture and a detection-side fixture. In order to hold optical fibers for introducing infrared light in their natural conditions, the fixtures are equipped with respective prisms for changing light paths by prescribed angles. Also, the fixtures are equipped with respective light-emitting diodes for indicating if the examination apparatus is in its operating condition.
摘要:
A device for analyzing fluorescent light signals consists of memory means for storing as a reference spectrum a spectrum obtained under predetermined conditions, and extraction means for extracting a predetermined component spectrum based on the results of a conversion of the reference spectrum using a specific wavelength of a measured spectrum obtained during actual measurement and a specific wavelength of the reference spectrum. The arrangement of the invention allows the spectrum of a specific component to be extracted accurately from measured spectra.