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41. 发明专利

BRPI0816925A2 Componentes de dispositivo óptico 未知
公开(公告)号：BRPI0816925A2
公开(公告)日：2015-03-17
申请号：BRPI0816925
申请日：2008-09-12
申请人： UNIV MISSOURI
发明人： XU ZHI
IPC分类号： A61B5/00

42. 发明专利

BRPI0719924A2 未知
公开(公告)号：BRPI0719924A2
公开(公告)日：2014-03-04
申请号：BRPI0719924
申请日：2007-12-06
申请人： UNIV MISSOURI
发明人： XU ZHI
IPC分类号： G01N11/04
摘要： A flow controller for use with a liquid chromatography detector. The flow controller includes a flow channel comprising an inlet portion, a control channel portion in communication with the inlet portion, and an outlet portion in communication with said control channel portion. The control channel portion has a cross-sectional area smaller than a cross-sectional area of a drift tube of the liquid chromatography detector for channeling the flow of droplets through the smaller cross-sectional area. The flow controller is shaped and sized to reduce pressure fluctuations and turbulence in the droplet stream of the liquid chromatography detector

43. 发明专利

BRPI0614147A2 未知
公开(公告)号：BRPI0614147A2
公开(公告)日：2011-03-09
申请号：BRPI0614147
申请日：2006-07-21
申请人： UNIV MISSOURI
发明人： XU ZHI , LARSON DAVID W
IPC分类号： G01N15/02 , G01B9/08 , G01B11/00 , G01J3/40 , G01J3/46 , G01J3/52 , G01J4/00 , G01N21/00 , G01N21/25 , G01N21/84 , G01N21/85 , G01N21/90
摘要： A focused droplet nebulizer of the invention produces substantially uniform droplets of a predetermined size. Droplets are pushed out through a small outlet orifice by the contraction of a chamber. The droplets can be carried on a substantially non-divergent path in a drift tube. A piezo membrane micro pump acts in response to an electrical control signal to force a droplet out of the outlet orifice. The nebulizer can operate at frequencies permitting a stream of individual droplets of the predetermined size to be sent along the substantially non-divergent path in the drift tube in a preferred embodiment ELSD device.

44. 发明专利

MX2009006096A DETECTOR DE CROMATOGRAFIA DE LIQUIDOS Y CONTROLADOR DE FLUJO PARA EL MISMO. 未知
公开(公告)号：MX2009006096A
公开(公告)日：2009-10-26
申请号：MX2009006096
申请日：2007-12-06
申请人： UNIV MISSOURI
发明人： XU ZHI , BOSE RAKESH , ANDERSON JAMES M
IPC分类号： G01N30/62
摘要： Un controlador de flujo para usarse con un detector de cromatografía de líquidos; el controlador de flujo incluye un canal de flujo que comprende una porción de entrada, una porción de canal de control en comunicación con la porción de entrada, y una porción de salida en comunicación con dicha porción de canal de control; la porción de canal de control tiene un área transversal más pequeña que un área transversal de un tubo de arrastre del detector de cromatografía de líquidos, para canalizar el flujo de gotitas a través del área transversal más pequeña; el controlador de flujo está formado y dimensionado para reducir las fluctuaciones de presión y la turbulencia de la corriente de gotitas del detector de cromatografía de líquidos.

45. 发明专利

MX2009006058A DETECTOR DE CROMATOGRAFIA LIQUIDA Y CONTROLADOR DE FLUJO DEL MISMO. 未知
公开(公告)号：MX2009006058A
公开(公告)日：2009-06-16
申请号：MX2009006058
申请日：2007-12-06
申请人： UNIV MISSOURI
发明人： XU ZHI
IPC分类号： B05B1/24
摘要： Un controlador de flujo para utilizarse con un detector de cromatografía líquida; el controlador de flujo incluye un canal de flujo que comprende una porción de entrada, una porción de canal de control en comunicación con la porción de entrada y una porción de salida en comunicación con la porción de canal de control; la porción de canal de control tiene un área en sección transversal menor al área en sección transversal del tubo de desplazamiento del detector de cromatografía líquida para canalizar el flujo de gotas a través del área en sección transversal más pequeña; el controlador de flujo se forma y mide para reducir las fluctuaciones de presión y turbulencia en la corriente de gotas del detector de cromatografía líquida.

46. 发明专利

AU2008307505A1 Optical device components 未知
公开(公告)号：AU2008307505A1
公开(公告)日：2009-04-09
申请号：AU2008307505
申请日：2008-10-03
申请人： UNIV MISSOURI
发明人： XU ZHI
IPC分类号： G01N21/00
摘要： Embodiments of the invention relate to an apparatus including a light source to generate a plurality of light beams with each of the plurality of light beams having a different wavelength range. The apparatus also includes a light funnel to direct the plurality of light beams to the target area, an aperture to direct the plurality of light beams emitting from the target area to a lens, the lens configured to collect the light beams emitting from the target area. Further, the apparatus includes a detector including a plurality of light-sensing devices each configured to detect a light beam and configured to generate an output signal indicative of an intensity of light detected and a processor for determining the blood characteristic as a function of each generated output signal.

47. 发明专利

CA2697824A1 NOISE CANCELLATION IN FOURIER TRANSFORM SPECTROPHOTOMETRY 未知
公开(公告)号：CA2697824A1
公开(公告)日：2009-03-05
申请号：CA2697824
申请日：2008-08-20
申请人： UNIV MISSOURI
发明人： LARSEN DAVID W , XU ZHI
IPC分类号： G01J3/42
摘要： Increasing signal to noise ratio in optical spectra obtained by spectrophotometers. An interferometer introduces interference effects into a source light beam. A dual beam configuration splits the source beam having the interference effects into a reference beam and a sample beam. The reference beam interacts with a reference substance and is detected by a reference detector. The sample beam interacts with a sample substance and is detected by a sample detector. An optical spectra of the sample is based on the difference between the detected reference beam and the detected sample beam.

48. 发明专利

AU2008293722A1 Noise cancellation in fourier transform spectrophotometry 未知
公开(公告)号：AU2008293722A1
公开(公告)日：2009-03-05
申请号：AU2008293722
申请日：2008-08-20
申请人： UNIV MISSOURI
发明人： XU ZHI , LARSEN DAVID W
IPC分类号： G01J3/42
摘要： Increasing signal to noise ratio in optical spectra obtained by spectrophotometers. An interferometer introduces interference effects into a source light beam. A dual beam configuration splits the source beam having the interference effects into a reference beam and a sample beam. The reference beam interacts with a reference substance and is detected by a reference detector. The sample beam interacts with a sample substance and is detected by a sample detector. An optical spectra of the sample is based on the difference between the detected reference beam and the detected sample beam.

49. 发明专利

AU2006203529A1 Light scattering detector 未知
公开(公告)号：AU2006203529A1
公开(公告)日：2007-04-19
申请号：AU2006203529
申请日：2006-08-16
申请人： UNIV MISSOURI
发明人： LARSEN DAVID W , XU ZHI
IPC分类号： G01N30/74 , B01D15/08 , G01N15/14 , G01N21/00 , G01N21/03 , G01N21/53 , G01N30/84
摘要： The invention concerns high sensitivity light scattering detection and its application to evaporative light scattering detection in liquid chromatography. The exemplary embodiment includes a detection cell to accept particles suspended in a gas stream and permit a polarized light beam to pass through a trajectory of the particles and gas stream. A sample light detector is disposed to detect light scattered in the detection cell. A light trap accepts the polarized beam after it passes through the detection cell. The light trap includes an elongated housing through which the polarized beam passes, and light absorptive material within the elongated housing. An absorptive filter is aligned such that the angle of incidence of the light beam upon the filter approximates Brewster's angle and the electric field vector of the beam is aligned with the plane of incidence between the beam and the filter. Other embodiments of the invention provide increased light collection. Embodiments of the invention include temperature-controlled entrance and exit ports that control particle trajectory. Embodiments of the invention include a reference cell disposed between a detection cell and a light trap, and the reference cell includes lensing and a spherical mirror to direct light toward a reference light detector. The reference light detector provides a reference signal that may be used with noise cancellation circuitry, operating in either voltage or current mode, to reduce light source noise in the sample signal.

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