scholarly journals Real-Time Detection of Long Lived Near Infrared luminescence from Colourless Cubic Zirconia by Time-Gated Imaging

Minerals ◽  
2020 ◽  
Vol 10 (10) ◽  
pp. 891
Author(s):  
Peter M. P. Lanigan ◽  
Colin D. McGuinness ◽  
Mark Rendle ◽  
Peter A. Aked ◽  
Christopher G. Bearcroft ◽  
...  
Keyword(s):  
Real Time ◽  
Near Infrared ◽  
Low Cost ◽  
Typical Feature ◽  
Cubic Zirconia ◽  
Decay Behaviour ◽  
Infrared Luminescence ◽  
Green Led ◽  
Real Time Detection ◽  
Gated Imaging

Here, we report a long-lived ms time scale decay luminescing in the near infrared >800 nm present in productions of ‘white’ colourless, facetted yittrium stabilized cubic zirconia and observed using time-gated imaging. The spectrum of the strong luminescing feature also has characteristics of Neodymium (Nd3+) and has a multiexponential decay behaviour. Real-time detection of cubic zirconia mounted in diamond jewellery containing very small stones (≤0.01 ct) is made possible, where observation by loupe is more challenging or other conventional techniques impractical and or slow to implement. The near infrared observed can be excited using a low-cost and eye/skin safe-visible green LED light source and the time-gated imaging of the luminescence using a machine vision monochrome camera. The use of near infrared, time-gated detection in combination with other verification instruments increases the robustness of screening diamond parcels. Therefore, it is recommended that any stone exhibiting strong delayed luminescence in the near infrared be treated with caution, as this is not a typical feature found in this precious gemstone. In this case, the instrument developed was expanded to incorporate a white LED illumination ring as a viewfinder, in order to aid the inspection of loose and mounted configurations.

A reversible near-infrared fluorescence probe for the monitoring of HSO3–/H2O2 regulated cycles in vivo

2021 ◽  
Author(s):  
Qiuying Song ◽  
Bo Zhou ◽  
Dongyu Zhang ◽  
Haijun Chi ◽  
Hongmin Jia ◽  
...  
Keyword(s):  
Real Time ◽  
Near Infrared ◽  
Fluorescence Probe ◽  
Redox Homeostasis ◽  
Research Field ◽  
Fluorescence Probes ◽  
Detection Capability ◽  
Near Infrared Fluorescence ◽  
Real Time Detection

The development of well-designed fluorescence probes for the monitoring redox homeostasis in biosystems has become a desired research field owing to their noninvasive and real-time detection capability in vivo. In...

Highly Specific near-Infrared Fluorescent Probe for the Real-Time Detection of β-Glucuronidase in Various Living Cells and Animals

2018 ◽  
Vol 90 (5) ◽  
pp. 3276-3283 ◽  
Author(s):  
Yinzhu Jin ◽  
Xiangge Tian ◽  
Lingling Jin ◽  
Yonglei Cui ◽  
Tao Liu ◽  
...  
Keyword(s):  
Real Time ◽  
Fluorescent Probe ◽  
Near Infrared ◽  
Living Cells ◽  
The Real ◽  
Real Time Detection

Near-infrared control and real-time detection of osteogenic differentiation in mesenchymal stem cells by multifunctional upconversion nanoparticles

Nanoscale ◽  
2020 ◽  
Vol 12 (18) ◽  
pp. 10106-10116 ◽  
Author(s):  
Kaipeng Wang ◽  
Qian Wu ◽  
Xichao Wang ◽  
Guohai Liang ◽  
Anli Yang ◽  
...  
Keyword(s):  
Stem Cells ◽  
Mesenchymal Stem Cells ◽  
Osteogenic Differentiation ◽  
Real Time ◽  
Near Infrared ◽  
Infrared Light ◽  
Upconversion Nanoparticles ◽  
Near Infrared Light ◽  
Regeneration Medicine ◽  
Real Time Detection

A multifuctional platform based on meseporous sillicon coated upconversion nanoparticles was developed for near-infrared light controlled and real-time detection of differentiation in mesenchymal stem cells for regeneration medicine.

scholarly journals Probeless non-invasive near-infrared spectroscopic bioprocess monitoring using microspectrometer technology

2019 ◽  
Vol 412 (9) ◽  
pp. 2103-2109 ◽  
Author(s):  
Robert Zimmerleiter ◽  
Julian Kager ◽  
Ramin Nikzad-Langerodi ◽  
Vladimir Berezhinskiy ◽  
Frank Westad ◽  
...  
Keyword(s):  
Real Time ◽  
Process Parameters ◽  
Near Infrared ◽  
Low Cost ◽  
Phenoxyacetic Acid ◽  
Bioprocess Monitoring ◽  
Fed Batch ◽  
Precise Control ◽  
Fed Batch Fermentation ◽  
Using Data

AbstractReal-time measurements and adjustments of critical process parameters are essential for the precise control of fermentation processes and thus for increasing both quality and yield of the desired product. However, the measurement of some crucial process parameters such as biomass, product, and product precursor concentrations usually requires time-consuming offline laboratory analysis. In this work, we demonstrate the in-line monitoring of biomass, penicillin (PEN), and phenoxyacetic acid (POX) in a Penicilliumchrysogenum fed-batch fermentation process using low-cost microspectrometer technology operating in the near-infrared (NIR). In particular, NIR reflection spectra were taken directly through the glass wall of the bioreactor, which eliminates the need for an expensive NIR immersion probe. Furthermore, the risk of contaminations in the reactor is significantly reduced, as no direct contact with the investigated medium is required. NIR spectra were acquired using two sensor modules covering the spectral ranges 1350–1650 nm and 1550–1950 nm. Based on offline reference analytics, partial least squares (PLS) regression models were established for biomass, PEN, and POX either using data from both sensors separately or jointly. The established PLS models were tested on an independent validation fed-batch experiment. Root mean squared errors of prediction (RMSEP) were 1.61 g/L, 1.66 g/L, and 0.67 g/L for biomass, PEN, and POX, respectively, which can be considered an acceptable accuracy comparable with previously published results using standard process spectrometers with immersion probes. Altogether, the presented results underpin the potential of low-cost microspectrometer technology in real-time bioprocess monitoring applications.

scholarly journals Sliding wire detection system of electric lock screw tool based on motor characteristics

2021 ◽  
Vol 2137 (1) ◽  
pp. 012009
Author(s):  
Ning Zhang ◽  
Yinxin Yan ◽  
Houcheng Yang ◽  
Zhangsi Yu
Keyword(s):  
Real Time ◽  
Detection System ◽  
Low Cost ◽  
High Sensitivity ◽  
High Accuracy ◽  
Normal Operation ◽  
Automatic Assembly ◽  
The Real ◽  
Current Change ◽  
Real Time Detection

Abstract This paper presents a sliding wire detection system of electric screw locking tool based on the characteristics of motor. The system can judge whether the screw has sliding wire through the current change of motor during normal operation, and realize the real-time detection and alarm of sliding wire. The system has the advantages of high sensitivity, low cost and high accuracy. It can be widely used in automatic assembly and other fields.

Real-time detection of hypochlorite in tap water and biological samples by a colorimetric, ratiometric and near-infrared fluorescent turn-on probe

The Analyst ◽  
2015 ◽  
Vol 140 (13) ◽  
pp. 4687-4693 ◽  
Author(s):  
Shuangshuang Ding ◽  
Qiong Zhang ◽  
Shuanghong Xue ◽  
Guoqiang Feng
Keyword(s):  
Real Time ◽  
Biological Samples ◽  
Near Infrared ◽  
Tap Water ◽  
Turn On ◽  
Real Time Detection ◽  
Water And Biological Samples

A highly selective and sensitive ratiometric and NIR fluorescent turn-on probe was reported for real-time detection of HClO.

scholarly journals Competitive Real-Time Near Infrared (NIR) Vein Finder Imaging Device to Improve Peripheral Subcutaneous Vein Selection in Venipuncture for Clinical Laboratory Testing

Micromachines ◽  
2021 ◽  
Vol 12 (4) ◽  
pp. 373
Author(s):  
Mark D. Francisco ◽  
Wen-Fan Chen ◽  
Cheng-Tang Pan ◽  
Ming-Cheng Lin ◽  
Zhi-Hong Wen ◽  
...  
Keyword(s):  
Real Time ◽  
Near Infrared ◽  
Imaging System ◽  
Low Cost ◽  
Oxide Semiconductor ◽  
Assessment Process ◽  
Source Image ◽  
Imaging Device ◽  
Dorsal Hand ◽  
Vein Imaging

In this study, near-infrared (NIR) technology was utilized to develop a low-cost real-time near infrared (NIR) guiding device for cannulation. A portable device that can be used by medical practitioners and also by students for their skills development training in performing cannulation. Methods. First, is the development of a reflectance type optical vein finder using three (3) light emitting diode (LED) lights with 960 nm wavelength, complementary metal-oxide-semiconductor-infrared (CMOS-IR) sensor camera with 1920 × 1080 UXGA (1080P), IR filter set for the given wavelength, and an open-source image processing software. Second, is the actual in-vitro human testing in two sites: the arm and dorsal hand of 242 subjects. The following parameters were included, such as gender, age, mass index (BMI), and skin tone. In order to maximize the assessment process towards the device, the researchers included the arm circumference. This augmented subcutaneous vein imaging study using the develop vein finder device compared the difference in the captured vein images through visual and digital imaging approaches. The human testing was performed in accordance with the ethical standards of the Trinity University of Asia—Institutional Ethics Review Committee (TUA—IERC). Results. The NIR imaging system of the developed vein finder in this study showed its capability as an efficient guiding device through real-time vein pattern recognition, for both sites. Improved captured vein images were observed, having 100% visibility of vein patterns on the dorsal hand site. Fourteen (5.79%) out of 242 subjects reported non-visible peripheral subcutaneous veins in the arm sites. Conclusions. The developed vein finder device with the NIR technology and reflected light principle with low-energy consumption was efficient for real-time peripheral subcutaneous vein imaging without the application of a tourniquet. This might be utilized as a guiding device in locating the vein for the purpose of cannulation, at a very low cost as compared to the commercially available vein finders. Moreover, it may be used as an instructional device for student training in performing cannulation.

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