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https://www.readbyqxmd.com/read/30549050/non-destructive-characterization-of-eggs-odor-in-different-statuses-of-fertilization-by-spme-gc-ms-coupled-with-electronic-nose
#1
Xiao-le Xiang, Ya-Lan Wang, Zhi-Hui Yu, Mei-Hu Ma, Zhi-Hui Zhu, Yon-Guo Jin
BACKGROUND: Early and non-destructive identification of fertile (F) eggs is a difficult task in the breeding process of laying hens. The odors emitted from unfertilized (UF), infertile (IF) and F eggs were characterized by SPME/GC-MS and electronic nose (E-nose) to determine their differences by principal component, partial least squares and canonical discriminant analyses. RESULTS: A total of 14 volatiles were identified in unhatched shell White Leghorn eggs, such as nonanal, decanal, 6-methyl-5-hepten-2-one, 6,10-dimethyl-5,9-Undecadien-2-one, etc...
December 13, 2018: Journal of the Science of Food and Agriculture
https://www.readbyqxmd.com/read/30547068/electronic-nose-dataset-for-beef-quality-monitoring-in-uncontrolled-ambient-conditions
#2
Dedy Rahman Wijaya, Riyanarto Sarno, Enny Zulaika
In recent years, the development of a rapid, simple, and low-cost meat assessment system using an electronic nose (e-nose) has been the concern of researchers. In this data article, we provide a time series dataset that was obtained from a beef quality monitoring experiment using an e-nose in uncontrolled ambient conditions. The availability of this dataset will enable discussion on how to deal with noisy e-nose signals and non-optimum sensor array in beef quality monitoring. Hence, the development of proper signal processing and robust machine learning algorithm are several challenges that must be faced...
December 2018: Data in Brief
https://www.readbyqxmd.com/read/30544999/evolution-of-volatile-compounds-and-spoilage-bacteria-in-smoked-bacon-during-refrigeration-using-an-e-nose-and-gc-ms-combined-with-partial-least-squares-regression
#3
Xinfu Li, Jiancai Zhu, Cong Li, Hua Ye, Zhouping Wang, Xiang Wu, Baocai Xu
The changes in the concentration of volatile organic compounds (VOCs) and biogenic amines (BAs) in smoked bacon during 45-day refrigerated storage is investigated using solid-phase micro-extraction coupled with gas chromatography-mass spectrometry and high-performance liquid chromatography. In total, 56 VOCs and 6 BAs were identified and quantified. The possible pathways leading to their formation are analyzed and considered as the potential signs of microbial activity, especially by specific spoilage microorganisms (SSOs)...
December 11, 2018: Molecules: a Journal of Synthetic Chemistry and Natural Product Chemistry
https://www.readbyqxmd.com/read/30529449/identification-and-prospective-stability-of-enose-derived-inflammatory-phenotypes-in-severe-asthma
#4
P Brinkman, A H Wagener, P P Hekking, A T Bansal, A H Maitland-van der Zee, Y Wang, H Weda, H H Knobel, T J Vink, N J Rattray, A D'Amico, G Pennazza, M Santonico, D Lefaudeux, B De Meulder, C Auffray, P S Bakke, M Caruso, P Chanez, K F Chung, J Corfield, S E Dahlén, R Djukanovic, T Geiser, I Horvath, N Krug, J Musial, K Sun, J H Riley, D E Shaw, T Sandström, A R Sousa, P Montuschi, S J Fowler, P J Sterk
BACKGROUND: Severe asthma is a heterogeneous condition as shown by independent cluster analyses based on demographic, clinical and inflammatory characteristics. A next step is to identify molecular driven phenotypes using 'omics'-technologies. Molecular fingerprints of exhaled breath are associated with inflammation and may qualify as non-invasive assessment of severe asthma phenotypes. OBJECTIVES: We aimed: 1) to identify severe asthma phenotypes by exhaled metabolomic fingerprints obtained from a composite of electronic noses (eNoses); 2) to assess stability of eNose derived phenotypes in relation to within-patient clinical and inflammatory changes...
December 5, 2018: Journal of Allergy and Clinical Immunology
https://www.readbyqxmd.com/read/30513787/non-invasive-diagnosis-of-diabetes-by-volatile-organic-compounds-in-urine-using-faims-and-fox4000-electronic-nose
#5
Siavash Esfahani, Alfian Wicaksono, Ella Mozdiak, Ramesh P Arasaradnam, James A Covington
The electronic nose (eNose) is an instrument designed to mimic the human olfactory system. Usage of eNose in medical applications is more popular than ever, due to its low costs and non-invasive nature. The eNose sniffs the gases and vapours that emanate from human waste (urine, breath, and stool) for the diagnosis of variety of diseases. Diabetes mellitus type 2 (DM2) affects 8.3% of adults in the world, with 43% being underdiagnosed, resulting in 4.9 million deaths per year. In this study, we investigated the potential of urinary volatile organic compounds (VOCs) as novel non-invasive diagnostic biomarker for diabetes...
December 1, 2018: Biosensors
https://www.readbyqxmd.com/read/30513479/multipurpose-sensing-applications-of-biocompatible-radish-derived-carbon-dots-as-cu-2-and-acetic-acid-vapor-sensors
#6
Janjira Praneerad, Nichaphat Thongsai, Preeyanuch Supchocksoonthorn, Sumana Kladsomboon, Peerasak Paoprasert
A recent trend in the preparation of carbon dots, optically unique nanomaterials, revolves around the use of readily-available, low-cost natural resources as precursors and their multipurpose applications. In this work, a hydrothermal method for preparing biocompatible carbon dots from radish was developed. The carbon dots were then tested for sensing of Cu2+ and acetic acid vapor. The carbon dots exhibited blue emission under UV illumination with, a quantum yield of 15%. The fluorescence emission was selectively quenched when Cu2+ ions were added, giving a detection limit of 0...
November 20, 2018: Spectrochimica Acta. Part A, Molecular and Biomolecular Spectroscopy
https://www.readbyqxmd.com/read/30502142/discrimination-of-geographical-origin-of-oranges-citrus-sinensis-l-osbeck-by-mass-spectrometry-based-electronic-nose-and-characterization-of-volatile-compounds
#7
Valentina Centonze, Vincenzo Lippolis, Salvatore Cervellieri, Anna Damascelli, Grazia Casiello, Michelangelo Pascale, Antonio Francesco Logrieco, Francesco Longobardi
An untargeted method using headspace solid-phase microextraction coupled to electronic nose based on mass spectrometry (HS-SPME/MS-eNose) in combination with chemometrics was developed for the discrimination of oranges of three geographical origins (Italy, South Africa and Spain). Three multivariate statistical models, i.e. PCA/LDA, SELECT/LDA and PLS-DA, were built and relevant performances were compared. Among the tested models, SELECT/LDA provided the highest prediction abilities in cross-validation and external validation with mean values of 97...
March 30, 2019: Food Chemistry
https://www.readbyqxmd.com/read/30482968/effect-of-clove-extract-on-lipid-oxidation-antioxidant-activity-volatile-compounds-and-fatty-acid-composition-of-salted-duck-eggs
#8
Putri Widyanti Harlina, Meihu Ma, Raheel Shahzad, Mostafa Mahmoud Gouda, Ning Qiu
Antioxidant activity, lipid oxidation, fatty acid composition and volatile compounds of duck eggs supplemented with clove extract were monitored over the salting period. The results indicated that application of clove extracts significantly reduced 2-thiobarbituric acid reactive substances and anisidine values as well as the conjugated dienes levels during curing. Clove extracts along with salting time had significant effects on the fatty acid composition. The predominant fatty acid in salted duck eggs supplemented with clove extracts for 14 day of the salting process was oleic acid, followed by palmitic acid and arachidonic acid...
December 2018: Journal of Food Science and Technology
https://www.readbyqxmd.com/read/30482583/exhaled-breath-testing-for-prostate-cancer-based-on-volatile-organic-compound-profiling-using-an-electronic-nose-device-aeonose%C3%A2-a-preliminary-report
#9
Claire G Waltman, Tom A T Marcelissen, Joep G H van Roermund
BACKGROUND: Prostate biopsy, an invasive examination, is the gold standard for diagnosing prostate cancer (PCa). There is a need for a novel noninvasive diagnostic tool that achieves a significantly high pretest probability for PCa, reducing unnecessary biopsy numbers. Recent studies have shown that volatile organic compounds (VOCs) in exhaled breath can be used to detect different types of cancers via training of an artificial neural network (ANN). OBJECTIVE: To determine whether exhaled-breath analysis using a handheld electronic nose device can be used to discriminate between VOC patterns between PCa patients and healthy individuals...
November 24, 2018: European Urology Focus
https://www.readbyqxmd.com/read/30479508/utilization-of-the-crust-from-dry-aged-beef-to-enhance-flavor-of-beef-patties
#10
Bumjin Park, Hae In Yong, Juhui Choe, Cheorun Jo
The crust that inevitably forms on dry-aged beef is usually trimmed and discarded before sale. The aim of this study was to explore methods for utilizing this crust in processed meat products. Four sirloins were dry-aged for 28 d at 4℃ (75% relative humidity). The crust obtained from the surface of the sirloins after completion of dry aging was lyophilized. Patties were prepared without added crust (control) or with 5% w/w crust, aerobically packaged, and stored at 4℃ for 7 d. Electronic nose analysis indicated that the volatile profile differed significantly between the patties with and without crust...
October 2018: Korean Journal for Food Science of Animal Resources
https://www.readbyqxmd.com/read/30478865/volatile-compounds-profiling-by-using-proton-transfer-reaction-time-of-flight-mass-spectrometry-ptr-tof-ms-the-case-study-of-dark-chocolates-organoleptic-differences
#11
Zoé Deuscher, Isabelle Andriot, Etienne Sémon, Marie Repoux, Sébastien Preys, Jean-Michel Roger, Renaud Boulanger, Hélène Labouré, Jean-Luc Le Quéré
Direct-injection mass spectrometry (DIMS) techniques have evolved into powerful methods to analyse volatile organic compounds (VOCs) without the need of chromatographic separation. Combined to chemometrics, they have been used in many domains to solve samples categorization issues based on volatilome determination. In this paper, different DIMS methods that have largely outperformed conventional electronic noses (e-noses) in classification tasks are briefly reviewed, with an emphasis on food-related applications...
November 26, 2018: Journal of Mass Spectrometry: JMS
https://www.readbyqxmd.com/read/30477127/use-of-electronic-noses-in-seawater-quality-monitoring-a-systematic-review
#12
REVIEW
Alessandro Tonacci, Francesco Sansone, Raffaele Conte, Claudio Domenici
Electronic nose (eNose) systems are particularly appreciated for their portability, usability, relative low cost, and real-time or near real-time response. Their application finds space in several domains, including environmental monitoring. Within this field, marine monitoring is of particular scientific relevance due to the fragility of this specific environment, daily threatened by human activities that can potentially bring to catastrophic and irreversible consequences on marine wildlife. Under such considerations, a systematic review, complying with the PRISMA guidelines, was conducted covering the period up to 15 October 2018, in PubMed, ScienceDirect, and Google Scholar...
November 23, 2018: Biosensors
https://www.readbyqxmd.com/read/30463202/gas-sensor-drift-counteraction-with-adaptive-active-learning-for-an-electronic-nose
#13
Tao Liu, Dongqi Li, Jianjun Chen, Yanbing Chen, Tao Yang, Jianhua Cao
Gas sensors are the key components of an electronic nose (E-nose) in violated odour analysis. Gas-sensor drift is a kind of physical change on a sensor surface once an E-nose works. The perturbation of gas-sensor responses caused by drift would deteriorate the performance of the E-nose system over time. In this study, we intend to explore a suitable approach to deal with the drift effect in an online situation. Considering that the conventional drift calibration is difficult to implement online, we use active learning (AL) to provide reliable labels for online instances...
November 19, 2018: Sensors
https://www.readbyqxmd.com/read/30441459/nos-e-a-new-fast-response-electronic-nose-health-monitoring-system
#14
Wentian Zhang, Taoping Liu, Miao Zhang, Yi Zhang, Huiqi Li, Maiken Ueland, Shari L Forbes, X Rosalind Wang, Steven W Su
We present a practical electronic nose (e-nose) sys-tem, NOS.E, for the rapid detection and identification of human health conditions. By detecting the changes in the composition of an individual's respiratory gases, which have been shown to be linked to changes in metabolism, e-nose systems can be used to characterize the physical health condition. We demonstrated our system's viability with a simple data set consists of breath collected under three different scenarios from one volunteer. Our preliminary results show the popular classifier SVM can discriminate NOS...
July 2018: Conference Proceedings: Annual International Conference of the IEEE Engineering in Medicine and Biology Society
https://www.readbyqxmd.com/read/30440987/a-low-cost-handheld-e-nose-for-renal-diseases-early-diagnosis
#15
P Le Maout, P S Laquintinie, C Lahuec, F Seguin, J-L Wojkiewicz, N Redon, L Dupont
In the last decade, the use of electronic olfaction systems for the early diagnosis of several pathologies by breath analysis has been investigated. In this study, an electronic nose including seven polyaniline sensors has been developed. An impedance measurement circuit and a micro-computer to process the sensor responses were studied to give a pre-diagnosis conclusion. The measurement accuracy is 97% when the E-nose is exposed to a simulated human breath and different concentration of ammonia, from 500 ppb to 2...
July 2018: Conference Proceedings: Annual International Conference of the IEEE Engineering in Medicine and Biology Society
https://www.readbyqxmd.com/read/30429025/multi-centre-prospective-study-on-diagnosing-subtypes-of-lung-cancer-by-exhaled-breath-analysis
#16
S Kort, M M Tiggeloven, M Brusse-Keizer, J W Gerritsen, J H Schouwink, E Citgez, F H C de Jongh, S Samii, J van der Maten, M van den Bogart, J van der Palen
OBJECTIVES: Lung cancer is a leading cause of mortality. Exhaled-breath analysis of volatile organic compounds (VOC's) might detect lung cancer early in the course of the disease, which may improve outcomes. Subtyping lung cancers could be helpful in further clinical decisions. MATERIALS AND METHODS: In a prospective, multi-centre study, using 10 electronic nose devices, 144 subjects diagnosed with NSCLC and 146 healthy subjects, including subjects considered negative for NSCLC after investigation, breathed into the Aeonose™ (The eNose Company, Zutphen, Netherlands)...
November 2018: Lung Cancer: Journal of the International Association for the Study of Lung Cancer
https://www.readbyqxmd.com/read/30409597/preparation-of-conducting-polyaniline-protoporphyrin-composites-and-their-application-for-sensing-vocs
#17
Zhihua Li, Xucheng Zhou, Jiyong Shi, Xiaobo Zou, Xiaowei Huang, Haroon Elrasheid Tahir
Polyaniline/protoporphyrin nanocomposites were prepared via a simple chemical method in the acidic suspension of protoporphyrin. The scanning electron microscope images revealed that the polyaniline/protoporphyrin composites exhibited an interesting nanosheet structure decorated with nanoparticles, which is rather different with the usual nanofiber morphology of polyaniline. The formation of the nanosheet structure is because protoporphyrin molecules may exist as a bilayer form at low pH, which is similar with the phospholipid bilayer in membranes of cells...
March 15, 2019: Food Chemistry
https://www.readbyqxmd.com/read/30388748/support-vector-machine-regression-for-calibration-transfer-between-electronic-noses-dedicated-to-air-pollution-monitoring
#18
Rachid Laref, Etienne Losson, Alexandre Sava, Maryam Siadat
Recently, the emergence of low-cost sensors have allowed electronic noses to be considered for densifying the actual air pollution monitoring networks in urban areas. Electronic noses are affected by changes in environmental conditions and sensor drifts over time. Therefore, they need to be calibrated periodically and also individually because the characteristics of identical sensors are slightly different. For these reasons, the calibration process has become very expensive and time consuming. To cope with these drawbacks, calibration transfer between systems constitutes a satisfactory alternative...
November 1, 2018: Sensors
https://www.readbyqxmd.com/read/30381229/chemical-profiling-and-multivariate-data-fusion-methods-for-the-identification-of-the-botanical-origin-of-honey
#19
Davide Ballabio, Elisa Robotti, Francesca Grisoni, Fabio Quasso, Marco Bobba, Serena Vercelli, Fabio Gosetti, Giorgio Calabrese, Emanuele Sangiorgi, Marco Orlandi, Emilio Marengo
The characterization of 72 Italian honey samples from 8 botanical varieties was carried out by a comprehensive approach exploiting data fusion of IR, NIR and Raman spectroscopies, Proton Transfer Reaction - Time of Flight - Mass Spectrometry (PTR-MS) and electronic nose. High-, mid- and low-level data fusion approaches were tested to verify if the combination of several analytical sources can improve the classification ability of honeys from different botanical origins. Classification was performed on the fused data by Partial Least Squares - Discriminant Analysis; a strict validation protocol was used to estimate the predictive performances of the models...
November 15, 2018: Food Chemistry
https://www.readbyqxmd.com/read/30380627/viscous-fingering-of-miscible-liquids-in-porous-and-swellable-media-for-rapid-diagnostic-tests
#20
Holly Clingan, Devon Rusk, Kathryn Smith, Antonio A Garcia
In lateral flow and colorimetric test strip diagnostics, the effects of capillary action and diffusion on speed and sensitivity have been well studied. However, another form of fluid motion can be generated due to stresses and instabilities generated in pores when two miscible liquids with different densities and viscosities come into contact. This study explored how a swellable test pad can be deployed for measuring urea in saliva by partially prefilling the pad with a miscible solution of greater viscosity and density...
October 29, 2018: Bioengineering
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