A disposable breath sensing tube with on-tube single-nanowire sensor array for on-site detection of exhaled breath biomarkers

Lab on a Chip ◽  
2016 ◽  
Vol 16 (22) ◽  
pp. 4395-4405 ◽  
Author(s):  
Chung-Hsuan Wu ◽  
Wei-Han Wang ◽  
Chien-Chong Hong ◽  
Kuo Chu Hwang
Keyword(s):  
Sensor Array ◽  
Low Cost ◽  
Fast Response ◽  
Exhaled Breath ◽  
Plastic Tube ◽  
Single Nanowire ◽  
Nanowire Sensor

The plastic tube with on-tube single-NW sensors demonstrates the advantages of low cost, fast response, and an easy-to-use breath-sensing procedure.

scholarly journals Gas Sensing Characterization of Single-Nanowire Sensor Array Systems Based on Non-Functionalized and Pt-Functionalized Tungsten Oxide

Proceedings ◽  
2017 ◽  
Vol 1 (4) ◽  
pp. 458
Author(s):  
Ondřej Chmela ◽  
Jakub Sadílek ◽  
Jakub Somer ◽  
Jordi Samà ◽  
Guillem Domènech-Gil ◽  
...  
Keyword(s):  
Tungsten Oxide ◽  
Sensor Array ◽  
Gas Sensing ◽  
Single Nanowire ◽  
Nanowire Sensor

An Automatic Anemometer Based on the Technology of Double-Ring Thermoelectric Sensing Structure

2013 ◽  
Vol 753-755 ◽  
pp. 2121-2125
Author(s):  
Hsing Cheng Chang ◽  
San Shan Hung ◽  
Shyan Lung Lin ◽  
I Nan Chang ◽  
Chi Chih Lai
Keyword(s):  
Real Time ◽  
Sensor Array ◽  
Low Cost ◽  
Fast Response ◽  
Ring Structure ◽  
Hot Wire ◽  
Double Ring ◽  
Flow Information ◽  
Thermoelectric Sensor ◽  
Machine Interface

The research presents a novel automatic anemometer based on the technology of automatic multi-dimensional thermoelectric sensor array. The multi-dimensional thermoelectric sensor array was designed to form a double-ring structure using commercial thermocouples to detect real-time airflow temperature distribution, velocity and direction. The sensing arrays and a controllable heater and a human-machine interface that is calibrated by a hot-wire anemometer. The anemometer has advantages of low cost, real-time detection with fast response. Related air flow information has measured accurately and repeatability.

Microextraction and Chromatographic Analysis of Budesonide Epimers in Exhaled Breath Condensate

2020 ◽  
Vol 16 (8) ◽  
pp. 1032-1040
Author(s):  
Laleh Samini ◽  
Maryam Khoubnasabjafari ◽  
Mohamad M. Alimorad ◽  
Vahid Jouyban-Gharamaleki ◽  
Hak-Kim Chan ◽  
...  
Keyword(s):  
Biological Fluids ◽  
Exhaled Breath Condensate ◽  
Low Cost ◽  
Exhaled Breath ◽  
Chromatography Method ◽  
Extraction Solvent ◽  
Drug Concentrations ◽  
Dispersive Liquid Liquid Microextraction ◽  
Breath Condensate

Background: Analysis of drug concentrations in biological fluids is required in clinical sciences for various purposes. Among other biological samples, exhaled breath condensate (EBC) is a potential sample for follow up of drug concentrations. Methods: A dispersive liquid-liquid microextraction (DLLME) procedure followed by a validated liquid chromatography method was employed for the determination of budesonide (BDS) in EBC samples collected using a homemade setup. EBC is a non-invasive biological sample with possible applications for monitoring drug concentrations. The proposed analytical method is validated according to the FDA guidelines using EBC-spiked samples. Its applicability is tested on EBC samples collected from healthy volunteers receiving a single puff of BDS. Results: The best DLLME conditions involved the use of methanol (1 mL) as a disperser solvent, chloroform (200 μL) as an extraction solvent, and centrifugation rate of 3500 rpm for 5 minutes. The method was validated over a concentration range of 21-210 μg·L-1 in EBC. Inter- and intra-day precisions were less than 10% where the acceptable levels are less than 20%. The validated method was successfully applied for the determination of BDS in EBC samples. Conclusion: The findings of this study indicate that the developed method can be used for the extraction and quantification of BDS in EBC samples using a low cost method.

Recognition of Explosive Precursors Using Nanowire Sensor Array and Decision Tree Learning

2012 ◽  
Vol 12 (7) ◽  
pp. 2384-2391 ◽  
Author(s):  
Junghwan Cho ◽  
Xiaopeng Li ◽  
Zhiyong Gu ◽  
Pradeep U. Kurup
Keyword(s):  
Decision Tree ◽  
Sensor Array ◽  
Decision Tree Learning ◽  
Nanowire Sensor

scholarly journals Clustering-Based Component Fraction Estimation in Solid–Liquid Two-Phase Flow in Dredging Engineering

Sensors ◽  
2020 ◽  
Vol 20 (19) ◽  
pp. 5697
Author(s):  
Chang Sun ◽  
Shihong Yue ◽  
Qi Li ◽  
Huaxiang Wang
Keyword(s):  
Clustering Algorithm ◽  
Two Phase Flow ◽  
Low Cost ◽  
Fast Response ◽  
New Method ◽  
Phase Flow ◽  
Reference Distribution ◽  
Two Phase ◽  
Long Time ◽  
Solid Liquid

Component fraction (CF) is one of the most important parameters in multiple-phase flow. Due to the complexity of the solid–liquid two-phase flow, the CF estimation remains unsolved both in scientific research and industrial application for a long time. Electrical resistance tomography (ERT) is an advanced type of conductivity detection technique due to its low-cost, fast-response, non-invasive, and non-radiation characteristics. However, when the existing ERT method is used to measure the CF value in solid–liquid two-phase flow in dredging engineering, there are at least three problems: (1) the dependence of reference distribution whose CF value is zero; (2) the size of the detected objects may be too small to be found by ERT; and (3) there is no efficient way to estimate the effect of artifacts in ERT. In this paper, we proposed a method based on the clustering technique, where a fast-fuzzy clustering algorithm is used to partition the ERT image to three clusters that respond to liquid, solid phases, and their mixtures and artifacts, respectively. The clustering algorithm does not need any reference distribution in the CF estimation. In the case of small solid objects or artifacts, the CF value remains effectively computed by prior information. To validate the new method, a group of typical CF estimations in dredging engineering were implemented. Results show that the new method can effectively overcome the limitations of the existing method, and can provide a practical and more accurate way for CF estimation.

scholarly journals A low-cost flexible pH sensor array for wound assessment

2016 ◽  
Vol 229 ◽  
pp. 609-617 ◽  
Author(s):  
Rahim Rahimi ◽  
Manuel Ochoa ◽  
Tejasvi Parupudi ◽  
Xin Zhao ◽  
Iman K. Yazdi ◽  
...  
Keyword(s):  
Sensor Array ◽  
Low Cost ◽  
Ph Sensor ◽  
Wound Assessment

scholarly journals Sensor array optimization techniques for exhaled breath analysis to discriminate diabetics using an electronic nose

ETRI Journal ◽  
2018 ◽  
Vol 40 (6) ◽  
pp. 802-812 ◽  
Author(s):  
Jin-Young Jeon ◽  
Jang-Sik Choi ◽  
Joon-Boo Yu ◽  
Hae-Ryong Lee ◽  
Byoung Kuk Jang ◽  
...  
Keyword(s):  
Electronic Nose ◽  
Sensor Array ◽  
Breath Analysis ◽  
Optimization Techniques ◽  
Exhaled Breath ◽  
Exhaled Breath Analysis ◽  
Array Optimization
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