The Experts below are selected from a list of 861 Experts worldwide ranked by ideXlab platform
Kazumi Kato - One of the best experts on this subject based on the ideXlab platform.
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sno2 nanosheet nanoparticle detector for the sensing of 1 nonanal gas produced by lung cancer
Scientific Reports, 2015Co-Authors: Yoshitake Masuda, Toshio Itoh, Kazumi KatoAbstract:SnO 2 Nanosheet/Nanoparticle Detector for the Sensing of 1-Nonanal Gas Produced by Lung Cancer
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sno2 nanosheet nanoparticle detector for the sensing of 1 nonanal gas produced by lung cancer
Scientific Reports, 2015Co-Authors: Yoshitake Masuda, Toshio Itoh, Woosuck Shin, Kazumi KatoAbstract:A sensor has been developed for detecting 1-nonanal gas present in the breath of lung cancer patients by combining SnO2 nanosheets with SnO2 nanoparticles and noble metal catalysts. A significant change in the electrical resistance of this sensor was observed with increasing 1-nonanal gas concentration; the resistance decreased by a factor of 1.12 within the range of 1 to 10 ppm at 300 °C. The recovery of the sensor's resistance after detecting 1-nonanal gas concentrations of 0.055, 0.18, 1, and 9.5 ppm was determined to be 86.1, 84.2, 80.4 and 69.2%, respectively. This high sensitivity is attributed to the accelerated oxidation of 1-nonanal molecules caused by the (101) crystal faces of the SnO2 nanosheets and should provide a simple and effective approach to the early detection of lung cancer.
Toshio Itoh - One of the best experts on this subject based on the ideXlab platform.
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sno2 nanosheet nanoparticle detector for the sensing of 1 nonanal gas produced by lung cancer
Scientific Reports, 2015Co-Authors: Yoshitake Masuda, Toshio Itoh, Kazumi KatoAbstract:SnO 2 Nanosheet/Nanoparticle Detector for the Sensing of 1-Nonanal Gas Produced by Lung Cancer
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sno2 nanosheet nanoparticle detector for the sensing of 1 nonanal gas produced by lung cancer
Scientific Reports, 2015Co-Authors: Yoshitake Masuda, Toshio Itoh, Woosuck Shin, Kazumi KatoAbstract:A sensor has been developed for detecting 1-nonanal gas present in the breath of lung cancer patients by combining SnO2 nanosheets with SnO2 nanoparticles and noble metal catalysts. A significant change in the electrical resistance of this sensor was observed with increasing 1-nonanal gas concentration; the resistance decreased by a factor of 1.12 within the range of 1 to 10 ppm at 300 °C. The recovery of the sensor's resistance after detecting 1-nonanal gas concentrations of 0.055, 0.18, 1, and 9.5 ppm was determined to be 86.1, 84.2, 80.4 and 69.2%, respectively. This high sensitivity is attributed to the accelerated oxidation of 1-nonanal molecules caused by the (101) crystal faces of the SnO2 nanosheets and should provide a simple and effective approach to the early detection of lung cancer.
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nonanal gas sensing properties of platinum palladium and gold loaded tin oxide vocs sensors
Sensors and Actuators B-chemical, 2013Co-Authors: Toshio Itoh, Takaomi Nakashima, Takafumi AkamatsuAbstract:Abstract We have investigated the nonanal sensing properties of Pt-, Pd-, and Au-loaded SnO2 (Pt, Pd, Au/SnO2) thick films. These films show a higher response to nonanal than a non-loaded SnO2 film, can detect several tens of ppb of nonanal and exhibit fast response and recovery times. Their nonanal sensing ability is improved by pretreatments, such as annealing temperature and aging. The resistance of these films in pure air depends on the working temperature, but the resistance in nonanal gas depends mainly on the film thickness. We suggest nonanal detection models for Pt, Pd, Au/SnO2 films with different film thicknesses, and determine the optimum film thickness for nonanal detection.
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6 3 4 noble metal added tin oxide voc sensors as nonanal detection for exhaled breath air monitoring
Proceedings IMCS 2012, 2012Co-Authors: Toshio Itoh, Takaomi Nakashima, Yasuhiro Setoguchi, Kimiko Kato, Masashi ToyotaAbstract:We have investigated the VOCs-sensing properties of Pt, Pd, Au-loaded SnO2 thick film for exhaled breath air. It has been reported that breaths of lung cancer patients include long methylene chain-aldehydes, such as nonanal. The Pt, Pd, Au-loading for SnO2 type gas sensors is advantage for detect to low concentration VOCs. The Pt,Pd,Au/SnO2 element shows higher response to nonanal than a non-loaded SnO2 element. The combustion of nonanal molecules on the surface of SnO2 grains is assisted by added noble metals. A nonanal-sensing property of the The Pt,Pd,Au/SnO2 depend on an annealing temperature. We installed the sensor element to a prototype of breath monitor with gas-chromatograph system, and analyzed mixed gas including three long methylene chain-aldehyde gases.
Yoshitake Masuda - One of the best experts on this subject based on the ideXlab platform.
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sno2 nanosheet nanoparticle detector for the sensing of 1 nonanal gas produced by lung cancer
Scientific Reports, 2015Co-Authors: Yoshitake Masuda, Toshio Itoh, Kazumi KatoAbstract:SnO 2 Nanosheet/Nanoparticle Detector for the Sensing of 1-Nonanal Gas Produced by Lung Cancer
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sno2 nanosheet nanoparticle detector for the sensing of 1 nonanal gas produced by lung cancer
Scientific Reports, 2015Co-Authors: Yoshitake Masuda, Toshio Itoh, Woosuck Shin, Kazumi KatoAbstract:A sensor has been developed for detecting 1-nonanal gas present in the breath of lung cancer patients by combining SnO2 nanosheets with SnO2 nanoparticles and noble metal catalysts. A significant change in the electrical resistance of this sensor was observed with increasing 1-nonanal gas concentration; the resistance decreased by a factor of 1.12 within the range of 1 to 10 ppm at 300 °C. The recovery of the sensor's resistance after detecting 1-nonanal gas concentrations of 0.055, 0.18, 1, and 9.5 ppm was determined to be 86.1, 84.2, 80.4 and 69.2%, respectively. This high sensitivity is attributed to the accelerated oxidation of 1-nonanal molecules caused by the (101) crystal faces of the SnO2 nanosheets and should provide a simple and effective approach to the early detection of lung cancer.
Anna Kulig - One of the best experts on this subject based on the ideXlab platform.
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Densities, Speeds of Sound, and Isentropic Compressibilities for Binary Mixtures of 1,2-Ethanediol with 2-Ethyl-1-hexanol, 1-Heptanol, or Ethanol at the Temperature 298.15 K and Densities for Mixtures of 1,2-Ethanediol with 1-Nonanol at the Temperatu
Journal of Chemical & Engineering Data, 2010Co-Authors: Edward Zorębski, Anna KuligAbstract:Densities and speeds of sound for binary mixtures of 1,2-ethanediol with three alkanols (2-ethyl-1-hexanol, 1-heptanol, or ethanol) were measured over the entire composition range in the temperature 298.15 K by means of a vibrating-tube densimeter and pulse-echo-overlap method. Density measurements were also made for mixtures of 1,2-ethanediol with 1-Nonanol at the temperatures (293.15 and 298.15) K. From these data, the excess molar volumes and excess molar isentropic compressibilities as well as the deviations of speed of sound were calculated and approximated by the Redlich−Kister polynomials. The negative values of the excess molar volumes and isentropic compressibilities over the entire composition range are observed only in the case of ethanol. In the cases of 2-ethyl-1-hexanol, 1-heptanol, and 1-Nonanol, the positive values of the excess molar volumes over the entire composition range are observed. Simultaneously, the negative values of the excess molar isentropic compressibilities over the entire ...
Paola Gonzalezaudino - One of the best experts on this subject based on the ideXlab platform.
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head louse feces chemical analysis and behavioral activity
Journal of Medical Entomology, 2019Co-Authors: F G Galassi, Maria Ines Picollo, Paola GonzalezaudinoAbstract:: Human head lice Pediculus humanus capitis (De Geer) (Phthiraptera: Pediculidae) are insect parasites closely associated with humans, feeding on the blood of their hosts and causing them skin irritation and probable secondary infections. Despite being a severe nuisance, very few studies have reported on intraspecific chemical communication in head lice. Here, we evaluated the attractive response of head lice to the volatile compounds and solvent extracts from their feces. We also chemically analyzed the main volatile components of these feces and those of the feces' extracts. Head lice were attracted to the methanol extract of their feces but not to the hexane or dichloromethane extracts, suggesting the polar nature of bioactive chemicals present in head louse feces. Follow-up chemical identifications, in fact, showed the presence of hypoxanthine, uric acid, and another purine tentatively identified as either guanine or iso-guanine. Additionally, head lice were significantly attracted by volatiles emitted from samples containing feces. The volatiles emanated from feces alone contained 19 identified substances: 2-pentanone, hexanal, heptanal, 3-methyl-3-buten-1-ol, octanal, sulcatone, nonanal, acetic acid, 2-ethyl-1-hexanol, decanal, 1-octanol, butyric acid, 1-Nonanol, hexanoic acid, octanoic acid, 2,6-dimethyl-7-octen-2-ol, 2-undecanone, geranylacetone, and hexadecane. The major compounds found were decanal, nonanal, hexanal, and acetic acid, together representing approximately 60% of the identified compounds. This work represents the first chemical evidence of intraspecies communication among head lice. The results support the existence of active substances present in the feces of P. humanus capitis that may be involved in its aggregation behavior.