sensitivity properties of a novel no2 gas sensor based on mesoporous wo3 thin film

... Sensors and Actuators B 96 (2003) 219–225 Sensitivity properties of a novel NO2 gas sensor based on mesoporous WO3 thin ﬁlmL.G. Teoh a , Y.M. Hon a , J. Shiehb, W.H. Lai a , M.H. Hon a, ∗ a Department ... NO2 gas sensors based on mesoporous WO3 thin ﬁlm to detect smallconcentration of NO2at low operating temperatures.Li and Kawi [13] have shown that a linear relationshipwas found between the surface areas ... the results clearly show that a higher surfacearea WO3 sensor has a much better sensitivity response to a low concentration gas. For comparison, it was reported that a metal oxide sensor (thick...

a selective nh3 gas sensor based on fe2o3–zno nanocomposites at room temperature

... detect the ammonia gas whose concentra-tion was as low as 1 ppm [12]. But the working temperature wasas high as 350◦C. Recently, Ivanovskaya et al. suggested that a sensor based on ␣-Fe2O3/In2O3nanocomposites ... Selectivity of the gas sensor based on pure ZnO nanoparticle.H. Tang et al. / Sensors and Actuators B 114 (2006) 910–915 913Fig. 5. Selectivity of the gas sensors based on: (a) 2% and (b) 4% ... selectivity of the gas sensor based on pureZnO nanoparticle. The sensor was exposed to TMA, ethanol,methanol, NH3and HCl of the same concentration level of 0.4 ppm at room temperature. From...

Báo cáo khoa học: "Introduction of a new paraphrase generation tool based on Monte-Carlo sampling" potx

... that is based on transformation rule applicationin section 2. In section 3 we propose a paraphrasegeneration method for this paradigm based on analgorithm used in two-player games. Section ... future research tracks to improve para-phrase generation tools.2 Statistical paraphrase generation usingtransformation rulesThe paraphrase generation problem can be seen asan exploration problem. ... In particular,it does not put constraint on the scoring function.We propose a variation of the UCT algorithm forparaphrase generation named MCPG for Monte-Carlo based Paraphrase Generation.The...

ammonia gas sensor based on electrosynthesized polypyrrole films

... 5a indi-cates an increase of the sensor s conductance. This modiﬁcation of conductance can be attributed to the desorption of ammonia fromsensitive layer. Among to this electrical variation ... al. / Talanta 78 (2009) 199–206Fig. 1. (a) Experimental set-up used for the analysis of NH3vapors and (b) schematic drawing of the ammonia gas sensor. 2. Experimental2.1. Fabrication of gas ... Talanta 78 (2009) 199–206Contents lists available at ScienceDirectTalantajournal homepage: www.elsevier.com/locate/talantaAmmonia gas sensor based on electrosynthesized...

room-temperature semiconductor gas sensor based on nonstoichiometric tungsten oxide nanorod film

... operation, whichare unattainable by the conventional materials. The majordrawback, however, remains due to difﬁculties in mass pro-duction of sensors based on individual 1D nanostructures.Alternative ... ratio.One-dimensional ͑1D͒ nanostructures with high surface-to-volume ratio and small grain size have attracted muchcurrent attention as candidate materials for solid-state gas sensors. Recently, nanosensors ... fab-rication of a MOS gas sensor, which entails drop coating of WO2.72nanorod solution on the Si bulk-micromachinedmembrane equipped with a hotplate for temperature regula-tion, as well as...

room-temperature semiconductor gas sensor based on nonstoichiometric

Báo cáo khóa học: Functional properties of the protein disulﬁde oxidoreductase from the archaeon Pyrococcus furiosus A member of a novel protein family related to protein disulﬁde-isomerase doc

... Thermoplasmavolcanium. Proc.NatlAcad.Sci.USA97, 14257–14262.49. Kawarabayasi, Y., Hino, Y., Horikawa, H., Yamazaki, S., Hai-kawa,Y.,Jin-n.,o,K.,Takahashi,M.,Sekine,M.,Baba,S.,Ankai, A. , Kosugi, ... K.,Takahashi,M.,Sekine,M.,Baba,S.,Ankai ,A. ,Kosugi,H.,Hosoyama, A. , Fukui, S., Nagai, Y., Nishijima, K., Otsuka, R.,Nakazawa, H., Takamiya, M., Kato, Y., Yoshizawa, T., Tanaka,T., Kudoh, Y., Yamazaki, J., Kushida, N., Oguchi, ... H., H os oyama, A. , Fu kui, S., N agai, Y.,Nishijima, K., Nakazawa, H., Takamiya, M., Masuda, S.,Funahashi, T., T anaka, T., Kudoh, Y ., Yamazaki, J., K ushida,N., Oguchi, A. & Kikuchi,...

effects of dimensions on the sensitivity of a conducting polymer microwire sensor

... concentration of themethanol was calculated from the ratio between the mass of methanol and that of air inside the test chamber. The sameapplied to acetone. The concentrations of methanol vapor ... sensitivities of these ﬁve types of sensors.6. Statistical analysis of sensing data Based on the method of least square [27], a statistical programSAS has been run to ﬁt the data points for further analyzing ... 107O. Such a resistance included Ag–PPy–Agcontact resistance and intrinsic resistance of PPy wire. Asindicated in [8], Ag–PPy–Ag contact was ohmic. The measuredcontact resistance was 1.21 Â105O....

novel hexagonal wo3 nanopowder with metal decorated carbon nanotubes as no2 gas sensor

... A vailable online at www.sciencedirect.comSensors and Actuators B 133 (2008) 151–155 Novel hexagonal WO3nanopowder with metal decorated carbonnanotubes as NO2 gas sensor Csaba Bal´azsi a, ∗, ... successfullyprepared by acidic precipitation from a sodium tungstate solu-tion. TEM analysis of nanopowders showed that the averagesize of hexagonal nanoparticles was 50–100 nm. Chemical gas sensors based ... fromcombustion and automotive emissions [1], is very important forthe environmental protection and human health. The adsorp-tion of gases basically occurs at the surface level of a sensingﬁlm, and an...

Tài liệu Báo cáo khoa học: Isolation and molecular characterization of a novel D-hydantoinase from Jannaschia sp. CCS1 docx

... isopropyl-b-d-thiogalacto-pyranoside at a ﬁnal concentration of 1 mm.Bacterial strains and culture conditionsE. coli strain DH 5a was used for the cloning and ampliﬁca-tion of all constructed plasmids. ... expression of DCase [31], which confersmore application advantages to HYDJsas a single set of chaperones can assist soluble expression of bothHYDJsand DCase.Although almost all hydantoinases ... agitation at200 rpm unless otherwise stated.Enzymatic activity assay and characterizationThe assay for hydantoinase activity was performed at 40 °Cwith constant shaking. The reaction mixture contained50...

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