6/28/09
The 14th International Conference of Near Infrared Spectroscopy
ขอเชิญร่วมส่งบทความงานประชุมวิชาการนานาชาติ NIR 2009 ครั้งที่ 14 บทคัดย่อสำหรับโปสเตอร์ คือ 31 สิงหาคม 2552 โดยงานประชุมจะจัดขึ้นวันที่ 9 ถึง 13 พฤศจิกายน 2552 ณ โรงแรมอมารีวอเตอร์เกท กรุงเทพฯ
6/27/09
6/22/09
6/17/09
Compact and Cleanable In-Process Optical Probe
Columbia, MD -- Optical methods such as UV/Vis or NIR spectroscopy can be very powerful tools for analyzing a range of product characteristics, but in processes involving wet and sticky powders it is necessary to ensure that the system has a clear view of the product. Conventional windows used in process equipment such as fluid bed systems, high shear granulators or spray dryers have always suffered from the risk of window fouling. The new Lighthouse Probe™ has overcome this problem.
In addition to in-process cleaning (CIP), to ensure a clear optical path, the Lighthouse Probe has been designed to enable the probe and wash system, including the critical product seal area, to be fully cleaned in place (CIP – Clean-In-Place) at the end of the process. The novel design also includes a self calibration facility which can be used to positively confirm that the seven observation windows have not become contaminated and also to regularly check the calibration of the spectrometer.
The Lighthouse Probe uses a combination of fiber optics and mirrors to give an exceptionally compact design suitable for simple mounting on the smallest processors without disrupting the process. At the same time it offers the ability to ensure that the analyzed sample volume is consistent with the scale of scrutiny required with respect to a unit dosage.
GEA Pharma Systems will now offer the Lighthouse Probe Technology as part of its process equipment and will continue to use its extensive background in process engineering to develop new applications. This will enable GEA Pharma Systems to offer world-class solutions to meet the demands for pharmaceutical production in the 21st century.
Options to retrofit to existing process equipment are also available.
In addition to in-process cleaning (CIP), to ensure a clear optical path, the Lighthouse Probe has been designed to enable the probe and wash system, including the critical product seal area, to be fully cleaned in place (CIP – Clean-In-Place) at the end of the process. The novel design also includes a self calibration facility which can be used to positively confirm that the seven observation windows have not become contaminated and also to regularly check the calibration of the spectrometer.
The Lighthouse Probe uses a combination of fiber optics and mirrors to give an exceptionally compact design suitable for simple mounting on the smallest processors without disrupting the process. At the same time it offers the ability to ensure that the analyzed sample volume is consistent with the scale of scrutiny required with respect to a unit dosage.
GEA Pharma Systems will now offer the Lighthouse Probe Technology as part of its process equipment and will continue to use its extensive background in process engineering to develop new applications. This will enable GEA Pharma Systems to offer world-class solutions to meet the demands for pharmaceutical production in the 21st century.
Options to retrofit to existing process equipment are also available.
6/10/09
Portable forensic tool identified for human hair analysis
Analysis of human hair at a crime scene may be possible with a portable technique adapted by Queensland University of Technology researcher Sarina Brandes.
The technique, called Near Infrared Spectroscopy (NIRS), has the advantage of being readily available and Ms Brandes has demonstrated it could be used to analyse hair for forensic purposes.
A chemistry Masters researcher, Ms Brandes said this method was independent of analysis of DNA, which could break down quite quickly, especially at disaster scenes such as after a tsunami.
Her supervisor, Dr Serge Kokot, who has researched the forensic possibilities of human hair analysis for the past 12 years, said human hair could survive relatively harsh environments, where DNA couldn't.
The technique, called Near Infrared Spectroscopy (NIRS), has the advantage of being readily available and Ms Brandes has demonstrated it could be used to analyse hair for forensic purposes.
A chemistry Masters researcher, Ms Brandes said this method was independent of analysis of DNA, which could break down quite quickly, especially at disaster scenes such as after a tsunami.
Her supervisor, Dr Serge Kokot, who has researched the forensic possibilities of human hair analysis for the past 12 years, said human hair could survive relatively harsh environments, where DNA couldn't.
6/4/09
BIOPAC Systems, Inc. and fNIR Devices Offer New Functional Near Infrared Systems to Study Brain Activity
The fNIR system provides researchers with real-time monitoring of tissue oxygenation in the brain as subjects take tests, perform tasks, or receive stimulation. It allows researchers to quantitatively assess brain functions -- such as attention, memory, planning, and problem solving -- while individuals perform cognitive tasks.
fNIR is a powerful near-infrared spectroscopy imaging tool for in-lab cognitive tests. This technique measures NIR light absorbance in blood of hemoglobin with and without oxygen and provides information about ongoing brain activity similar to functional MRI studies. It eliminates many of the drawbacks of fMRI and provides a safe, affordable, noninvasive solution for cognitive function assessment. fNIR results have been tested to agree with fMRI results.
The technology empowers researchers by providing greater flexibility for study design, including working within complex lab environments and operating in non-traditional lab locations for field studies. BIOPAC Systems, Inc. has partnered with fNIR Devices to offer the technology as part of BIOPAC's range of data acquisition & analysis systems for the life sciences. Davood Tashayyod, CEO, fNIR Devices, says, "We created a headband for continuous NIR spectroscopy to obtain neurovascular coupling data while keeping subjects comfortable and free to move around. Our fNIR results have been tested to agree with fMRI results."
fNIR data combines with physiological signals acquired through BIOPAC's data acquisition and analysis systems, such as ECG, respiration, cardiac output, blood pressure, electrodermal activity and stimulus response markers; AcqKnowledge software provides automated analysis tools for event related potentials and ensemble averaging. The system interfaces with most stimulus presentation systems (such as E-Prime or SuperLab) and BIOPAC's range of Virtual Reality systems.
BIOPAC CEO Frazer Findlay says, "Combining fNIR technology with BIOPAC's physiological monitoring systems further expands BIOPAC's human-based neurophysiological product line and puts BIOPAC in the forefront of advanced noninvasive subject monitoring."
The fNIR100 is suitable for a wide range of applications: Human Performance Assessment (Cognitive Function), Depth of Anesthesia Monitoring, Pain Assessment, Brain Computer Interface, Neurorehabilitation, Virtual Reality, Autism, Credibility Assessment.
fNIR is a powerful near-infrared spectroscopy imaging tool for in-lab cognitive tests. This technique measures NIR light absorbance in blood of hemoglobin with and without oxygen and provides information about ongoing brain activity similar to functional MRI studies. It eliminates many of the drawbacks of fMRI and provides a safe, affordable, noninvasive solution for cognitive function assessment. fNIR results have been tested to agree with fMRI results.
The technology empowers researchers by providing greater flexibility for study design, including working within complex lab environments and operating in non-traditional lab locations for field studies. BIOPAC Systems, Inc. has partnered with fNIR Devices to offer the technology as part of BIOPAC's range of data acquisition & analysis systems for the life sciences. Davood Tashayyod, CEO, fNIR Devices, says, "We created a headband for continuous NIR spectroscopy to obtain neurovascular coupling data while keeping subjects comfortable and free to move around. Our fNIR results have been tested to agree with fMRI results."
fNIR data combines with physiological signals acquired through BIOPAC's data acquisition and analysis systems, such as ECG, respiration, cardiac output, blood pressure, electrodermal activity and stimulus response markers; AcqKnowledge software provides automated analysis tools for event related potentials and ensemble averaging. The system interfaces with most stimulus presentation systems (such as E-Prime or SuperLab) and BIOPAC's range of Virtual Reality systems.
BIOPAC CEO Frazer Findlay says, "Combining fNIR technology with BIOPAC's physiological monitoring systems further expands BIOPAC's human-based neurophysiological product line and puts BIOPAC in the forefront of advanced noninvasive subject monitoring."
The fNIR100 is suitable for a wide range of applications: Human Performance Assessment (Cognitive Function), Depth of Anesthesia Monitoring, Pain Assessment, Brain Computer Interface, Neurorehabilitation, Virtual Reality, Autism, Credibility Assessment.
5/29/09
Bioethanol. Near infrared spectroscopy. Chemometrics. “… determination of the ethanol concentration in distillation residues (stillages).”
The researchers from Vienna have also noted:
* “NIR spectra were acquired in the wavelength range of 1100-2300nm by means of a transflectance probe for measurements in liquid samples.”
* “For building of regression models a genetic algorithm has been applied for variable selection, and partial least-squares (PLS) regression for creation of linear models.”
* “A realistic estimation of the prediction performance of the models was obtained by a repeated double cross-validation (rdCV).”
* “Reduced data sets with only 15 variables showed improved prediction qualities, in comparison with models containing 235 variables, particularly for the determination of the ethanol concentration in distillation residues (stillages).”
* “The squared correlation coefficient, R(2), between the concentrations obtained by HPLC analysis and the concentrations derived from NIR data (using 15 selected wavelengths, test set samples) was 0.999 for ethanol in stillage, and 0.977 for glucose in mash.”
* “The standard deviation of prediction errors, SEP, obtained from test set samples was 0.6gL(-1) for ethanol (2% of the mean ethanol concentration), and 2.0gL(-1) for glucose (9.6% of the mean glucose concentration).”
* “NIR spectra were acquired in the wavelength range of 1100-2300nm by means of a transflectance probe for measurements in liquid samples.”
* “For building of regression models a genetic algorithm has been applied for variable selection, and partial least-squares (PLS) regression for creation of linear models.”
* “A realistic estimation of the prediction performance of the models was obtained by a repeated double cross-validation (rdCV).”
* “Reduced data sets with only 15 variables showed improved prediction qualities, in comparison with models containing 235 variables, particularly for the determination of the ethanol concentration in distillation residues (stillages).”
* “The squared correlation coefficient, R(2), between the concentrations obtained by HPLC analysis and the concentrations derived from NIR data (using 15 selected wavelengths, test set samples) was 0.999 for ethanol in stillage, and 0.977 for glucose in mash.”
* “The standard deviation of prediction errors, SEP, obtained from test set samples was 0.6gL(-1) for ethanol (2% of the mean ethanol concentration), and 2.0gL(-1) for glucose (9.6% of the mean glucose concentration).”
5/21/09
Sample cell for hand-held impedance spectroscopy device
Disclosed herein is a sample cell for use in conjunction with an impedance spectroscopy analysis device having two electrodes extending therefrom. The sample cell is attachable to and detachable from the analysis device and includes a housing having an input port for receiving a fluid sample to be tested. The sample cell also includes two spaced apart parallel plates within the housing and in contact with the fluid sample, wherein when the sample cell is attached to the analysis device, each of the two electrodes contacts a respective one of the plates such that an excitation signal can be provided from the analysis device via the electrodes and the plates to excite the fluid sample, and a response signal indicative of the fluid sample can be communicated via the plates and the electrodes to the analysis device.
5/20/09
Portable forensic tool identified for human hair analysis
Analysis of human hair at a crime scene may be possible with a portable technique adapted by Queensland University of Technology researcher Sarina Brandes.
The technique, called Near Infrared Spectroscopy (NIRS), has the advantage of being readily available and Ms Brandes has demonstrated it could be used to analyse hair for forensic purposes.
A chemistry Masters researcher, Ms Brandes said this method was independent of analysis of DNA, which could break down quite quickly, especially at disaster scenes such as after a tsunami.
Her supervisor, Dr Serge Kokot, who has researched the forensic possibilities of human hair analysis for the past 12 years, said human hair could survive relatively harsh environments, where DNA couldn't.
"NIRS has been found to need only a few millimetres of a single hair for analysis, but until now, we have not had the ready capacity to apply this technology in harsh environments," Dr Kokot said.
"Ms Brandes' achievement is several fold: it opens the door for on-field measurements; it provides a method for analysis of hair after immersion in water, and it also has the advantage to readily differentiate a naturally coloured hair from that treated with a hair dye to give a similar colour."
Dr Kokot said Ms Brandes' technique could obtain the infrared profile from only a tiny part of a strand of hair and then interpret this profile using specialised mathematical methods to compare it with similar profiles collected from suitable reference hair samples.
"The results can be displayed in an easily understood diagram and/or the profiles can be rank-ordered and the position of the tested hair can be established relative to the reference samples," he said.
"In this manner, Sarina's technique can establish a person's gender, race and whether they had chemically treated their hair, as well as what the original hair colour was."
Dr Kokot said the use of Ms Brandes' research could help to identify victims of natural disasters, like tsunamis, where hair has been in water.
"Other useful spin-offs have been that Sarina's technique can also identify what type of water the hair was found in, like sea water, and how long the hair had been immersed in it," he said.
"Hair found at a crime scene could be matched against hair found in a comb of the victim which can be used as the reference sample, or it can be compared against hairs from suspects in a similar manner."
Dr Kokot said portable NIRS instruments were available and could be used at a crime or disaster scene.
The technique, called Near Infrared Spectroscopy (NIRS), has the advantage of being readily available and Ms Brandes has demonstrated it could be used to analyse hair for forensic purposes.
A chemistry Masters researcher, Ms Brandes said this method was independent of analysis of DNA, which could break down quite quickly, especially at disaster scenes such as after a tsunami.
Her supervisor, Dr Serge Kokot, who has researched the forensic possibilities of human hair analysis for the past 12 years, said human hair could survive relatively harsh environments, where DNA couldn't.
"NIRS has been found to need only a few millimetres of a single hair for analysis, but until now, we have not had the ready capacity to apply this technology in harsh environments," Dr Kokot said.
"Ms Brandes' achievement is several fold: it opens the door for on-field measurements; it provides a method for analysis of hair after immersion in water, and it also has the advantage to readily differentiate a naturally coloured hair from that treated with a hair dye to give a similar colour."
Dr Kokot said Ms Brandes' technique could obtain the infrared profile from only a tiny part of a strand of hair and then interpret this profile using specialised mathematical methods to compare it with similar profiles collected from suitable reference hair samples.
"The results can be displayed in an easily understood diagram and/or the profiles can be rank-ordered and the position of the tested hair can be established relative to the reference samples," he said.
"In this manner, Sarina's technique can establish a person's gender, race and whether they had chemically treated their hair, as well as what the original hair colour was."
Dr Kokot said the use of Ms Brandes' research could help to identify victims of natural disasters, like tsunamis, where hair has been in water.
"Other useful spin-offs have been that Sarina's technique can also identify what type of water the hair was found in, like sea water, and how long the hair had been immersed in it," he said.
"Hair found at a crime scene could be matched against hair found in a comb of the victim which can be used as the reference sample, or it can be compared against hairs from suspects in a similar manner."
Dr Kokot said portable NIRS instruments were available and could be used at a crime or disaster scene.
5/19/09
5/16/09
4/27/09
Near-Infrared Reflectance Spectroscopy–Principal Components Regression Analyses of Soil Properties
Near-Infrared Reflectance Spectroscopy–Principal Components Regression Analyses of Soil Properties
4/23/09
Application of two-dimensional near-infrared (2D-NIR) correlation spectroscopy to the discrimination of three species of Dendrobium
The objective of this paper was to apply two-dimensional (2D) near-infrared (NIR) correlation spectroscopy to the discrimination of three species of Dendrobium. Generalized 2D-NIR correlation spectroscopy was able to enhance spectral resolution, simplify the spectrum with overlapped bands and provide information about temperature-induced spectral intensity variations that was hard to obtain from one-dimensional NIR spectroscopy. The FT-NIR spectra were measured over a temperature range of 30-140°C. The 2D synchronous and asynchronous spectra showed remarkable differences within the range of 5600-4750 cm-1 between different species of Dendrobium. Copyright © 2009 John Wiley & Sons, Ltd.
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