150 results about "Hplc fld" patented technology

A tomography system based on Cerenkov tomography, comprising: a detector of Cerenkov fluorescence for acquiring optical plane images; a structural imaging system for acquiring three-dimensional structural images;a bed device for supporting an object to be imaged; a computer for forming an optical image, a structural image and a CLT image. The invention adopts the SP3 model and the semi threshold iterator to implement the global reconstruction of the CLT, and obtains the three-dimensional tomography to image of the distribution of the radiopharmaceutical and the molecular probe in vivo within a short time. Since ordinary CCD camera is used, the cost of the imaging system has been sharply reduced for the equipment's construct and maintenance compared with PET / SPECT or γ camera. Therefore the present invention expands the options of the molecular probe, and application of the is medicine Imaging.

An ultra small fluorescence detector capable of detecting in real time reaction undergoing in a micro chamber having a predetermined volume and disposed on a microfluid chip is provided. The fluorescence detector for detecting in real time PCR amplification undergoing in the microfluid chip having a micro chamber with a predetermined volume includes a light source generating an excitation beam, a first optical system capable of irradiating the excitation beam having a predetermined spot size to the micro chamber, a first detector, and a second optical system reflecting a fluorescent beam derived from the excitation beam having the predetermined spot size in the micro chamber to the first detector. Accordingly, the fluorescence detector is designed such that light emitted by a light source is focused between a first mirror and an objective lens. Therefore, the spot size of an excitation beam transmitted by the objective lens is largely formed so that the excitation beam can be irradiated on the whole micro chamber of the microfluid chip, thereby detecting a fluorescent beam on a broader area.

A downhole fluid properties optical analysis probe (1) to analyze at least one property of a multiphase flow mixture (100) flowing in a hydrocarbon well (51) has an elongated cylindrical body shape and comprises an optical tip (5) at one end of the elongated cylindrical body arranged to be in contact with the multiphase flow mixture (100), and an optoelectronics module (11) at another end of the elongated cylindrical body arranged to be separated from the multiphase flow mixture (100) and coupled to the optical tip (5) by an optical fiber bundle. The optoelectronics module (11) comprises at least one light source (13) arranged to emit electromagnetic radiations in a wavelength range such that reflectance occurs when gas (G) is present at the optical tip (5) and fluorescence occurs when oil (O) is present at the optical tip (5), at least one reflectance light detector (14) arranged to be responsive to a reflectance light and to provide a reflectance signal (U1(t)) and at least one fluorescence light detector (15) arranged to be responsive to a fluorescence light and to provide a fluorescence signal (U2(t)). The optical fiber bundle comprises at least one first optical fiber (6) coupling the light source (13) to the optical tip (5), at least one second optical fiber (7) coupling the optical tip (5) to the reflectance light detector (14), and at least one third optical fiber (8) coupling the optical tip (5) to the fluorescence light detector (15), the at least one first, second and third optical fibers being mounted together into a protective tube (9) resistant to downhole conditions.

A clear fluorescence image is easily obtained irrespective of variation of scattering due to variation of the depth of a focus position in a specimen. A scanning optical device includes a laser light source for emitting laser light, a scanning unit for scanning the laser light emitted from the laser light source on the specimen, a focus depth adjusting unit for adjusting the depth of the focus position in the specimen of the laser light to be scanned, a fluorescence detector for detecting fluorescence generated from the focus position of the laser light in the specimen, a reference depth information storage unit for storing the absolute height of a predetermined reference depth of the focus position of the laser light in the specimen by the focus depth adjusting unit, and a hardware setting storage unit for storing the relative height to the absolute height of the reference depth at each focus position of the laser light and at least one set value of the laser light source, the scanning unit, and the fluorescence detector in association with each other.

The invention discloses a high performance liquid chromatography detection method for pyrazine compounds in Baijiu. According to the method, a high performance liquid chromatography-fluorescence detector (HPLC-FLD) method is adopted to perform qualitative and quantitative analysis on the pyrazine compounds in Baijiu, and 2-methylpyrazine, 2, 3-dimethylpyrazine, 2, 5-dimethylpyrazine, 2, 6-dimethylpyrazine, 2, 3, 5-trimethyl pyrazine, 2-ethyl-6-methylpyrazine, 2, 3, 5, 6-tetramethylpyrazine and 2, 3-dimethyl-5-ethylpyrazine can be measured at the same time. With the adoption of the method, 3 types of isomeride can be separated without chemical derivation, chiral columns or adding chiral reagents, is high in sensitivity, good in accuracy and repeatability, simple to operate, and low in cost.