scholarly journals Electronic-Nose Technology Using Sputum Samples in Diagnosis of Patients with Tuberculosis

2010 ◽  
Vol 48 (11) ◽  
pp. 4235-4238 ◽  
Author(s):  
A. Kolk ◽  
M. Hoelscher ◽  
L. Maboko ◽  
J. Jung ◽  
S. Kuijper ◽  
...  
Keyword(s):  
Electronic Nose ◽  
Electronic Nose Technology

scholarly journals Deteksi Formalin Pada Buah Tomat (Lycopersicum esculentum Mill) Dengan Teknologi Hidung Elektronik (Electronic Nose)

2019 ◽  
Vol 4 (2) ◽  
pp. 359-366
Author(s):  
Irfan Maibriadi ◽  
Ratna Ratna ◽  
Agus Arip Munawar
Keyword(s):  
Principal Component Analysis ◽  
Electronic Nose ◽  
Principal Component ◽  
Component Analysis ◽  
Lycopersicum Esculentum ◽  
Olfactory Ability ◽  
Pca Method ◽  
The Difference ◽  
Electronic Nose Technology

Abstrak,  Tujuan dari penelitian ini adalah mendeteksi kandungan dan kadar formalin pada buah tomat dengan menggunakan instrument berbasis teknologi Electronic nose. Penelitian ini menggunakan buah tomat yang telah direndam dengan formalin dengan kadar 0.5%, 1%, 2%, 3%, 4%, dan buah tomat tanpa perendaman dengan formalin (0%). Jumlah sampel yang digunakan pada penelitian ini adalah sebanyak 18 sampel. Pengukuran spektrum beras menggunakan sensor Piezoelectric Tranducer. Klasifikasi data spektrum buah tomat menggunakan metode Principal Component Analysis (PCA) dengan pretreatment nya adalah Gap Reduction. Hasil penelitian ini diperoleh yaitu: Hidung elektronik mulai merespon aroma formalin pada buah tomat pada detik ke-8.14, dan dapat mengklasifikasikan kandungan dan kadar formalin pada buah tomat pada detik ke 25.77. Hidung elektronik yang dikombinasikan dengan metode principal component analysis (PCA) telah berhasil mendeteksikandungan dan kadar formalin pada buah tomat dengan tingkat keberhasilan sebesar 99% (PC-1 sebesar 93% dan PC-2 sebesar 6%). Perbedaan kadar formalin menjadi faktor utama yang menyebabkan Elektronik nose mampu membedakan sampel buah tomat yang diuji, karena semakin tinggi kadar formalin pada buah tomat maka aroma khas dari buah tomat pun semakin menghilang, sehingga Electronic nose yang berbasis kemampuan penciuman dapat membedakannya.Detect Formaldehyde on Tomato (Lycopersicum esculentum Mill) With Electronic Nose TechnologyAbstract, The purpose of this study is to detect the contents and levels of formalin in tomatoes by using instruments based on Electronic nose technology. This study used tomatoes that have been soaked in formalin with a concentration of 0.5%, 1%, 2%, 3%, 4%, 5% and tomatoes without soaking with formalin (0%). The samples in this study were 18 samples. The measurements of the intensity on tomatoes aroma were using Piezoelectric Transducer sensors. The classification of tomato spectrum data was using the Principal Component Analysis (PCA) method with Gap Reduction pretreatment. The results of this study were obtained: the Electronic nose began to respond the smell of formalin on tomatoes at 8.14 seconds, and it could classify the content and formalin levels in tomatoes at 25.77 seconds. Electronic nose combined with the principal component analysis (PCA) method have successfully detected the content and levels of formalin in tomatoes with a success rate at 99% (PC-1 of 93% and PC-2 of 6%). The difference of grade formalin levels is the main factor that causes Electronic nose to be able to distinguish the tomato samples tested, because the higher of formalin content in tomatoes, the distinctive of tomatoes aroma is increasingly disappearing. Thereby, the Electronic nose based on  the olfactory ability can distinguish them. 

The need for electronic noses for environmental odour exposure assessment

2013 ◽  
Vol 69 (1) ◽  
pp. 135-141 ◽  
Author(s):  
Laura Capelli ◽  
Licinia Dentoni ◽  
Selena Sironi ◽  
Renato Del Rosso
Keyword(s):  
Exposure Assessment ◽  
Electronic Nose ◽  
Landfill Gas ◽  
Monitoring Site ◽  
Electronic Noses ◽  
Odour Source ◽  
Detection Frequency ◽  
Odour Emissions ◽  
Electronic Nose Technology

This paper focuses on the opportunities for using electronic noses for odour exposure assessment purposes, especially in cases where dispersion modelling is not applicable. Such cases include, for instance, those sources where a detailed characterisation and quantification of the odour emissions for every hour of the simulation time domain is particularly difficult, due to the nature of the source or to the variability of the emissions over time. In such situations, it is useful to determine odour exposure directly at receptors instead. This paper critically discusses the state of the art of electronic nose technology as far as its application to the determination of odour exposure at receptors is concerned. One example of electronic nose application to the monitoring of odours from an Italian municipal solid waste (MSW) landfill is reported, in order to discuss the instrument's potential and limits. The monitoring results are represented by the number of measures that are classified in a specific olfactory class; this information allows the odour exposure at each monitoring site in terms of odour detection frequency to be determined. Besides a quantification of the odour episodes, electronic noses allowed the identification of the landfill gas as the monitored landfill major odour source.

scholarly journals Electronic Nose Technology to Measure Soil Microbial Activity and Classify Soil Metabolic Status

2011 ◽  
Author(s):  
Fabrizio De Cesare ◽  
Elena Di Mattia ◽  
Simone Pantalei ◽  
Emiliano Zampetti ◽  
Vittorio Vinciguerra ◽  
...  
Keyword(s):  
Microbial Activity ◽  
Electronic Nose ◽  
Soil Microbial Activity ◽  
Metabolic Status ◽  
Soil Microbial ◽  
Electronic Nose Technology

scholarly journals Identifying volatile metabolite signatures for the diagnosis of bacterial respiratory tract infection using electronic nose technology: A pilot study

PLoS ONE ◽  
2017 ◽  
Vol 12 (12) ◽  
pp. e0188879 ◽  
Author(s):  
Joseph M. Lewis ◽  
Richard S. Savage ◽  
Nicholas J. Beeching ◽  
Mike B. J. Beadsworth ◽  
Nicholas Feasey ◽  
...  
Keyword(s):  
Pilot Study ◽  
Tract Infection ◽  
Respiratory Tract ◽  
Respiratory Tract Infection ◽  
Electronic Nose ◽  
Volatile Metabolite ◽  
Electronic Nose Technology

Removal of Rancid-Acid Odor of Expeller-Pressed Virgin Coconut Oil by Gamma Irradiation: Evaluation by Sensory and Electronic Nose Technology

2016 ◽  
Vol 9 (10) ◽  
pp. 1724-1734 ◽  
Author(s):  
Probir Kumar Ghosh ◽  
Sabyasachi Chatterjee ◽  
Paramita Bhattacharjee ◽  
Nabarun Bhattacharyya
Keyword(s):  
Gamma Irradiation ◽  
Electronic Nose ◽  
Coconut Oil ◽  
Virgin Coconut Oil ◽  
Electronic Nose Technology

scholarly journals Aroma Volatile Profiles from Ripe Tomatoes are Influenced by Physiological Maturity at Harvest: An Application for Electronic Nose Technology

1998 ◽  
Vol 123 (6) ◽  
pp. 1094-1101 ◽  
Author(s):  
Fernando Maul ◽  
Steven A. Sargent ◽  
Murat O. Balaban ◽  
Elizabeth A. Baldwin ◽  
Donald J. Huber ◽  
...  
Keyword(s):  
Electronic Nose ◽  
Output Analysis ◽  
Mahalanobis Distances ◽  
Physiological Maturity ◽  
Ethylene Treatment ◽  
Volatile Profiles ◽  
Profile Changes ◽  
Exogenous Ethylene ◽  
Multivariate Discriminant ◽  
Electronic Nose Technology

The effect of physiological maturity at harvest on ripe tomato (Lycopersicon esculentum Mill.) volatile profiles was studied using ripening response time (in days) to 100 μL·L-1 exogenous ethylene treatment as a tool to separate immature-green from mature-green fruit. Electronic nose (EN) sensor array and gas chromatography (GC) analyses were used to document volatile profile changes in tomatoes that required a 1-, 3-, or 5-day ethylene treatment to reach the breaker stage. EN output analysis using multivariate discriminant and canonical analyses classified intact tomato and whole tomato homogenate samples that required 3 or 5 days of ethylene treatment as significantly different (P < 0.01) from those that required only 1 day. The GC aroma profiles from whole tomato homogenate showed that 1-day fruit had significantly higher levels (P < 0.05) of 1-penten-3-one, cis-3-hexenal, 6-methyl-5-hepten-2-one, 2-isobutylthiazole, and geranylacetone when compared to 5-day fruit. Analysis of excised tomato tissues showed that pericarp (including columnella) produced an average 219% greater concentration of the 16 aroma volatiles quantified by GC when compared to locular gel (442 and 203 μL·L-1, respectively). EN analysis concurred with GC by showing greater average Mahalanobis distance between pericarp tissue groupings when compared to locular gel groupings (78.25 and 12.33 units, respectively). Pericarp tissue from the 5-day ethylene treatment showed significantly lower levels of 1-penten-3-one, trans-2-heptenal, 6-methyl-5-hepten-2-one, 2-isobutylthiazole, geranylacetone, and β-ionone compared to the 1- and 3-day treatments, Similarly, locular gel from the 3- and 5-day ethylene treatments had significantly lower levels of 1-penten-3-one, 2-isobutylthiazole, and 1-nitro-2-phenylethane compared to 1-day samples. cis-3-Hexenol in locular gel was the only volatile compound that showed significantly higher levels with increasing ethylene treatment. EN analysis showed greater Mahalanobis distances between 1- and 3-day ethylene samples than between 3- and 5-day ethylene samples (32.09 and 12.90, 24.14 and 6.52, 116.31 and 65.04, and 15.74 and 13.28 units, for intact tomato, whole tomato, pericarp, and locular gel homogenate, respectively).

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