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122 results on '"Tu, C.-H."'

4. P425 Real-world evidence on effectiveness and safety of vedolizumab therapy for inflammatory bowel disease in Taiwan: Results from the TSIBD registry (VIOLET Study)

Author

Wei, S C, primary, Lin, W C, additional, Chang, C H, additional, Tu, C H, additional, Feng, I C, additional, Shieh, M J, additional, Chung, C S, additional, Yen, H H, additional, Chou, J W, additional, Tai, W C, additional, Wong, J M, additional, Liu, Y H, additional, Huang, T Y, additional, Chuang, C H, additional, Tsai, T J, additional, Chiang, F F, additional, Lu, C Y, additional, Hsu, W H, additional, Yu, F J, additional, Chao, T H, additional, Wu, D C, additional, Ho, A S, additional, Lin, H H, additional, Feng, C L, additional, Wu, K L, additional, Wong, M W, additional, Tung, C C, additional, Lin, C C, additional, Chen, C C, additional, Hu, H M, additional, Lu, L S, additional, Wang, H S, additional, Wu, I C, additional, Kuo, H Y, additional, Wu, J F, additional, Shih, H Y, additional, Ni, Y H, additional, Tang, S L, additional, Chang, H C, additional, and Chen, P H, additional

Published
2021
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6. Tourism, transport, and land use: a dynamic impact assessment for Kaohsiung’s Asia New Bay Area

Author

Man, C-Y, Shyr, OF, Hsu, Y-Y, Shepherd, S, Lin, H-L, and Tu, C-H

Abstract

This paper proposes a hybrid methodology for analysing the causal relations between public transportation development, tourism and land use by combining System Dynamics (SD) with Geographical Information Systems (GIS) and agent-based modelling (ABM). It is applied to illustrate the quantitative and spatial effect of the two phases Light Rail Transit (LRT) development in Asia New Bay Area, Kaohsiung, Taiwan. This paper also furthers the application of the ABM spatial information as interactive variables in the stocks-flow model. The simulation results support that development policies of LRT are significant to the future tourism in Asia New Bay Area, while the under debate second phase of LRT is estimated to raise the number of visitors in long term by alleviating the deteriorating road traffic congestion. This policy-oriented simulation can serve as a reference to the decision-makers towards the future management of LRT.

Published
2020

11. GPS compass: a novel navigation equipment

Author

Tu, C.-H., Tu, K.-Y., Chang, F.-R., and Wang, L.-S.

Subjects
Compass -- Research, Astronautics in navigation -- Research, Aerospace and defense industries, Business, Computers, Electronics, Electronics and electrical industries
Abstract

A GPS (Global Positioning System)-based compass is designed, which consists of three parts: the pointer, the sensor, and the controller. Using the carrier phase signals from GPS satellites, the I m long pointer equipped with two GPS receivers can aim to the desired direction with accuracy less than one degree. A baseline rotation method is proposed to resolve the problem of integer ambiguities. The classical antenna swap method is simply a special case of the rotation method. The rotating character of the compass provides the convenient environment for applying the turning technique. Such compass may replace the traditional heading devices in navigation systems, such as the magnetic compasses or gyroscopes.

Published
1997

12. The role of perceived risk on intention to use online banking in Vietnam

Author

Tu C. H. Nguyen and Thanh D. Nguyen

Subjects
Risk awareness, Service (business), Social risk, business.industry, 05 social sciences, Intention to use, 02 engineering and technology, Structural equation modeling, Risk perception, 020204 information systems, 0502 economics and business, 0202 electrical engineering, electronic engineering, information engineering, 050211 marketing, The Internet, Business, Resizing, Marketing
Abstract

Online banking is a substantial service in the enlargement strategy of the modern bank sector. Nevertheless, this service has not been widely used, because of users are still scared of the risks of online transactions. Thus, the in-depth and distinct works of risks in risk awareness are an essential and meaningful assignment for the banking sector. This study investigates the role of perceived risk on intention to use online banking. The results of SEM (structural equation modelling) evidence risk factors (privacy risk, security risk, social risk, time risk, and financial-performance risk) in perceived risk, which has a negative effect on intention to use online banking in Vietnam. Research results can help to propose solutions for enhancing the safety and mitigating the risks in online banking.

Published
2017

15. Lifetime of excess electron-hole pairs measured with white noise performance of the photoccurent.

Author

Kuan, C. H. and Tu, C. H.

Subjects
*EXCESS electrons, *LASER beams, *NOISE measurement
Abstract

Presents a study which proposed a method to measure the lifetime of excess electron-hole pairs generated by laser beams. Importance of the lifetime of the excess carriers in a semiconductor; Measurement principles; Components of the noise measurement system.

Published
2000
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16. Submucosal tumor appearance is a useful endoscopic predictor of early primary-site recurrence after definitive chemoradiotherapy for esophageal squamous cell carcinoma

Author

Tu, C-H, Muto, M, Horimatsu, T, Taku, K, Yano, T, Minashi, K, Onozawa, M, Nihei, K, Ishikura, S, Ohtsu, A, and Yoshida, S

Subjects
recurrence, surveillance, esophageal cancer, chemoradiotherapy
Abstract

Chemoradiotherapy (CRT) for esophageal cancer is disadvantageous because of a high locoregional failure rate. Detecting early small recurrent cancers at the primary site is necessary for potential salvage treatment. However, most endoscopists are inexperienced and therefore, a role for surveillance endoscopy after complete remission (CR) has not been established. We retrospectively evaluated serial surveillance endoscopic images from patients eventually proved to have primary-site recurrence in order to identify useful endoscopic features for early diagnosis. From January 2000 to December 2004, 303 patients with esophageal squamous cell carcinoma underwent definitive CRT, and 133 of them achieved CR. The surveillance endoscopic images stored at intervals of 1-3 months for the 16 patients with recurrence only at the primary tumor site and the 61 patients with no recurrence were collected for reexamination. Among 133 patients who achieved CR, 16 (12%) developed only local recurrence at the primary site. Thirteen of the 16 primary-site recurrent tumors (81%) appeared as submucosal tumors (SMT), with the remaining appearing as erosions or mild strictures. Of biopsy-proven recurrences, 81% were preceded by newly developed lesions such as SMT, erosions, or mild strictures detected by earlier surveillance endoscopies. For all 77 patients achieving CR with no metastasis, 86% of the evolving SMT with negative biopsies were eventually confirmed as cancer at later endoscopies. Thirteen of the 21 evolving lesions were subsequently confirmed as recurrent cancer. Early primary-site recurrence of esophageal cancer after a complete response to CRT is detectable with frequent endoscopic surveillance. SMT appearance is a useful endoscopic sign of early recurrence, as well as a predictor of subsequent diagnosis of recurrence.

Published
2010

20. Normative values and factors affecting water‐perfused esophageal high‐resolution impedance manometry for a Chinese population.

Author

Tseng, P.‐H., Wong, R. K. M., Wu, J.‐F., Chen, C.‐C., Tu, C.‐H., Lee, Y.‐C., Lee, H.‐C., Wang, H.‐P., and Wu, M.‐S.

Subjects
ESOPHAGEAL stenosis, HIGH resolution spectroscopy, IMPEDANCE spectroscopy, ANTHROPOMETRY, GENDER
Abstract

Abstract: Background: Combined esophageal high‐resolution impedance manometry (HRIM) measures multiple pressures and bolus transit simultaneously, facilitating detailed assessment of esophageal motility. Currently, normative values for water‐perfused HRIM systems for Chinese populations are lacking. Methods: Healthy volunteers were enrolled for comprehensive anthropometric measures, blood biochemistry tests, and an HRIM study using 22 water‐perfused pressure sensors and 12 impedance channels. Ten 5‐mL liquid swallows of saline at 30‐second intervals were conducted. The following parameters were calculated: distal contractile integral (DCI), distal latency (DL), lower esophageal sphincter (LES) basal pressure, 4‐second integrated relaxation pressure (IRP‐4s), and complete bolus transit percentage. Normal values were established based on the 5th and 95th percentiles. Key Results: All 66 participants (34 male, 32 female, aged 21‐64 years) completed the study and tolerated the HRIM procedure well. The upper normal limit (95th percentile) of IRP‐4 second was 20 mmHg. The 5th‐95th percentile range for DCI, DL, and complete bolus transit was 99‐2186 mmHg●s●cm, 6.2‐11.3 second, and 50%‐100%, respectively. Age was negatively correlated with DL. Females had significantly higher upper limits for IRP‐4s and median DCI than males. Multivariate analyses confirmed that IRP‐4s was higher in females, and that higher body mass index and waist circumference were associated with reduced DL and better bolus transit, respectively. Conclusions and Inferences: We established normative values for the water‐perfused HRIM system for a Chinese population. Gender and anthropometric factors may affect various major HRIM parameters and should be taken into account when interpreting HRIM results in clinical practice. [ABSTRACT FROM AUTHOR]

Published
2018
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29. Posters * Reproductive Endocrinology (i.e. PCOS, Menarche, Menopause etc.)

Author

Fujii, R., primary, Fujita, S., additional, Waseda, T., additional, Oka, Y., additional, Takagi, H., additional, Tomizawa, H., additional, Sasagawa, T., additional, Makinoda, S., additional, Cavagna, M., additional, Braga, D. P. A. F., additional, Figueira, R. C. S., additional, Aoki, T., additional, Maldonado, L. G. L., additional, Iaconelli, A., additional, Borges, E., additional, Prabhakar, s., additional, Dittrich, R., additional, Beckmann, M. W., additional, Hoffmann, I., additional, Mueller, A., additional, Kjotrod, S., additional, Carlsen, S. M., additional, Rasmussen, P. E., additional, Holst-Larsen, T., additional, Mellembakken, J., additional, Thurin-Kjellberg, A., additional, Haapaniemi Kouru, K., additional, Morin Papunen, L., additional, Humaidan, P., additional, Sunde, A., additional, von During, V., additional, Pappalardo, S., additional, Valeri, C., additional, Crescenzi, F., additional, Manna, C., additional, Sallam, H. N., additional, Polec, A., additional, Raki, M., additional, Tanbo, T., additional, Abyholm, T., additional, Fedorcsak, P., additional, Tabanelli, C., additional, Ferraretti, A. P., additional, Feliciani, E., additional, Magli, M. C., additional, Fasolino, C., additional, Gianaroli, L., additional, Wang, T., additional, Feng, C., additional, Song, Y., additional, Dong, M. Y., additional, Sheng, J. Z., additional, Huang, H. F., additional, Sayyah Melli, M., additional, Kazemi-shishvan, M., additional, Snajderova, M., additional, Zemkova, D., additional, Pechova, M., additional, Teslik, L., additional, Lanska, V., additional, Ketel, I., additional, Serne, E., additional, Stehouwer, C., additional, Korsen, T., additional, Hompes, P., additional, Smulders, Y., additional, Voorstemans, L., additional, Homburg, R., additional, Lambalk, C., additional, Bellver, J., additional, Martinez-Conejero, J. A., additional, Pellicer, A., additional, Labarta, E., additional, Alama, P., additional, Melo, M. A. B., additional, Horcajadas, J. A., additional, Agirregoitia, N., additional, Peralta, L., additional, Mendoza, R., additional, Exposito, A., additional, Matorras, R., additional, Agirregoitia, E., additional, Ajina, M., additional, Chaouache, N., additional, Gaddas, M., additional, Souissi, A., additional, Tabka, Z., additional, Saad, A., additional, Zaouali-Ajina, M., additional, Zbidi, A., additional, Eguchi, N., additional, Jinno, M., additional, Watanabe, A., additional, Hirohama, J., additional, Hatakeyama, N., additional, Choi, Y. M., additional, Kim, J. J., additional, Kim, D. H., additional, Yoon, S. H., additional, Ku, S. Y., additional, Kim, S. H., additional, Kim, J. G., additional, Lee, K. S., additional, Moon, S. Y., additional, Xiong, Y., additional, Liang, X., additional, Li, Y., additional, Yang, X., additional, Wei, L., additional, Fujii, R., additional, Utsunomiya, T., additional, Chu, S., additional, Li, P., additional, Akarsu, S., additional, Dirican, E. K., additional, Akin, K. O., additional, Kormaz, C., additional, Goktolga, U., additional, Ceyhan, S. T., additional, Kara, C., additional, Nadamoto, K., additional, Tarui, S., additional, Ida, M., additional, Sugihara, K., additional, Haruki, A., additional, Hukuda, A., additional, Morimoto, Y., additional, Albu, A., additional, Albu, D., additional, Sandu, L., additional, Kong, G., additional, Cheung, L., additional, Lok, I., additional, Pinto, A., additional, Teixeira, L., additional, Figueiredo, H., additional, Pires, I., additional, Silva Carvalho, J. L., additional, Pereira, M. L., additional, Faut, M., additional, de Zuniga, I., additional, Colaci, D., additional, Barrios, E., additional, Oubina, A., additional, Terrado Gil, G., additional, Motta, A., additional, Horton, M., additional, Sobral, F., additional, Gomez Pena, M., additional, Gleicher, N., additional, Barad, D. H., additional, Li, Y. P., additional, Zhao, H. C., additional, Spaczynski, R. Z., additional, Guzik, P., additional, Banaszewska, B., additional, Krauze, T., additional, Wykretowicz, A., additional, Wysocki, H., additional, Pawelczyk, L., additional, Sarikaya, E., additional, Gulerman, C., additional, Cicek, N., additional, Mollamahmutoglu, L., additional, Venetis, C. A., additional, Kolibianakis, E. M., additional, Toulis, K., additional, Goulis, D., additional, Loutradi, K., additional, Chatzimeletiou, K., additional, Papadimas, I., additional, Bontis, I., additional, Tarlatzis, B. C., additional, Schultze-Mosgau, A., additional, Griesinger, G., additional, Schoepper, B., additional, Cordes, T., additional, Diedrich, K., additional, Al-Hasani, S., additional, Gomez, R., additional, Jovanovic, V., additional, Sauer, C. M., additional, Shawber, C. J., additional, Sauer, M. V., additional, Kitajewski, J., additional, Zimmermann, R. C., additional, Bungum, L., additional, Jacobsson, A. K., additional, Rosen, F., additional, Becker, C., additional, Andersen, C. Y., additional, Guner, N., additional, Giwercman, A., additional, Kiapekou, E., additional, Zapanti, E., additional, Boukelatou, D., additional, Mavreli, T., additional, Bletsa, R., additional, Stefanidis, K., additional, Drakakis, P., additional, Mastorakos, G., additional, Loutradis, D., additional, Malhotra, N., additional, Sharma, V., additional, Kumar, S., additional, Roy, K. K., additional, Sharma, J. B., additional, Ferraretti, A., additional, Crippa, A., additional, Stanghellini, I., additional, Robles, F., additional, Serdynska-Szuster, M., additional, Kristensen, S. L., additional, Ernst, E., additional, Toft, G., additional, Olsen, S. F., additional, Bonde, J. P., additional, Vested, A., additional, Ramlau-Hansen, C. H., additional, Wang, F. F., additional, Qu, F., additional, Ding, G. L., additional, Gallot, V., additional, Genro, V., additional, Roux, I., additional, Scheffer, J. B., additional, Frydman, R., additional, Fanchin, R., additional, Kanta Goswami, S., additional, Banerjee, S., additional, Chakravarty, B. N., additional, Kabir, S. N., additional, Seeber, B. E., additional, Morandell, E., additional, Kurzthaler, D., additional, Wildt, L., additional, Dieplinger, H., additional, Tutuncu, L., additional, Bodur, S., additional, Dundar, O., additional, Ron - El, R., additional, Seger, R., additional, Komarovsky, D., additional, Kasterstein, E., additional, Komsky, A., additional, Maslansky, B., additional, Strassburger, D., additional, Ben-Ami, I., additional, Zhao, X. M., additional, Ni, R. M., additional, Lin, L., additional, Dong, M., additional, Tu, C. H., additional, He, Z. H., additional, Yang, D. Z., additional, Karamalegos, C., additional, Polidoropoulos, N., additional, Papanikopoulos, C., additional, Stefanis, P., additional, Argyrou, M., additional, Doriza, S., additional, Sisi, V., additional, Moschopoulou, M., additional, Karagianni, T., additional, Mentorou, C., additional, Economou, K., additional, Davies, S., additional, Mastrominas, M., additional, Gougeon, A., additional, De Los Santos, M. J., additional, Garcia-Laez, V., additional, Esteban, F., additional, Crespo, J., additional, Li, H. W. R., additional, Anderson, R. A., additional, Yeung, W. S. B., additional, Ho, P. C., additional, Ng, E. H. Y., additional, Yang, H. I., additional, Lee, K. E., additional, Seo, S. K., additional, Kim, H. Y., additional, Cho, S. H., additional, Choi, Y. S., additional, Lee, B. S., additional, Park, K. H., additional, Cho, D. J., additional, Hart, R., additional, Doherty, D., additional, Mori, T., additional, Hickey, M., additional, Sloboda, D., additional, Norman, R., additional, Huang, R. C., additional, Beilin, L., additional, Freiesleben, N., additional, Lossl, K., additional, Johannsen, T. H., additional, Loft, A., additional, Bangsboll, S., additional, Hougaard, D., additional, Friis-Hansen, L., additional, Christiansen, M., additional, Nyboe Andersen, A., additional, Thum, M. Y., additional, Abdalla, H., additional, Martinez-Salazar, J., additional, De la Fuente, G., additional, Kohls, G., additional, Garcia Velasco, J. A., additional, Yasmin, E., additional, Kukreja, S., additional, Barth, J., additional, Balen, A. H., additional, Esra, T., additional, Var, T., additional, Citil, A., additional, Dogan, M., additional, Messini, C. I., additional, Dafopoulos, K., additional, Chalvatzas, N., additional, Georgoulias, P., additional, Anifandis, G., additional, Messinis, I. E., additional, Celik, O., additional, Hascalik, S., additional, Celik, N., additional, Sahin, I., additional, Aydin, S., additional, Hanna, C. W., additional, Bretherick, K. L., additional, Liu, C. C., additional, Stephenson, M. D., additional, Robinson, W. P., additional, Louwers, Y. V., additional, Goodarzi, M. O., additional, Taylor, K. D., additional, Jones, M. R., additional, Cui, J., additional, Kwon, S., additional, Chen, Y. D. I., additional, Guo, X., additional, Stolk, L., additional, Uitterlinden, A. G., additional, Laven, J. S. E., additional, Azziz, R., additional, Navaratnarajah, R., additional, Grun, B., additional, Sinclair, J., additional, Dafou, D., additional, Gayther, S., additional, Timms, J. F., additional, Hardiman, P. J., additional, Ye, Y., additional, Wu, R., additional, Ou, J., additional, Kim, S. D., additional, Jee, B. C., additional, Lee, J. Y., additional, Suh, C. S., additional, Jung, J. H., additional, Opmeer, B. C., additional, Broeze, K. A., additional, Coppus, S. F., additional, Collins, J. A., additional, Den Hartog, J. E., additional, Land, J. A., additional, Van der Linden, P. J., additional, Marianowski, P., additional, Ng, E., additional, Van der Steeg, J. W., additional, Steures, P., additional, Strandell, A., additional, Mol, B. W., additional, Tarlatzi, T. B., additional, Kyrou, D., additional, Mertzanidou, A., additional, Fatemi, H. M., additional, Devroey, P., additional, Batenburg, T. E., additional, Konig, T. E., additional, Overbeek, A., additional, Schats, R., additional, Lambalk, C. B., additional, Carone, D., additional, Vizziello, G., additional, Vitti, A., additional, Chiappetta, R., additional, Topcu, H. O., additional, Yuksel, B., additional, Islimye, M., additional, Karakaya, J., additional, ozat, M., additional, Batioglu, S., additional, Kuchenbecker, W. K., additional, Groen, H., additional, Bolster, J. H., additional, van Asselt, S., additional, Wolffenbuettel, B. H., additional, Hoek, A., additional, Wu, Y., additional, Pan, H., additional, Chen, X., additional, Huang, H., additional, Zavos, A., additional, Verikouki, C., additional, Van Os, L., additional, Vink-Ranti, C. Q. J., additional, Rijnders, P. M., additional, Tucker, K. E., additional, Jansen, C. A. M., additional, Lucco, F., additional, Pozzobon, C., additional, Lara, E., additional, Galliano, D., additional, Ballesteros, A., additional, Ghoshdastidar, B., additional, Maity, S. P., additional, Ghoshdastidar, S., additional, Luna, M., additional, Vela, G., additional, Sandler, B., additional, Barritt, J., additional, Flisser, E. D., additional, Copperman, A. B., additional, Nogueira, D., additional, Prat, L., additional, Degoy, J., additional, Bonald, F., additional, Montagut, J., additional, Maity, S., additional, Chen, S., additional, Luo, C., additional, Zhen, H., additional, Shi, X., additional, Wu, F., additional, Ni, Y., additional, Merdassi, G., additional, Chaker, A., additional, Kacem, K., additional, Benmeftah, M., additional, Fourati, S., additional, Wahabi, D., additional, Zhioua, F., additional, Zhioua, A., additional, Saini, P., additional, Saini, A., additional, Sugiyama, R., additional, Nakagawa, K., additional, Nishi, Y., additional, Jyuen, H., additional, Kuribayashi, Y., additional, Inoue, M., additional, Jancar, N., additional, Vrtacnik Bokal, E., additional, Virant-Klun, I., additional, Lee, J. H., additional, Kim, S. G., additional, Cha, E. M., additional, Park, I. H., additional, Lee, K. H., additional, Dahdouh, E. M., additional, Desrosiers, P., additional, St-Michel, P., additional, Villeneuve, M., additional, Fontaine, J. Y., additional, Granger, L., additional, Ramon, O., additional, Burgos, J., additional, Abanto, E., additional, Gonzalez, M., additional, Mugica, J., additional, Corcostegui, B., additional, Tal, J., additional, Ziskind, G., additional, Ohel, G., additional, Paltieli, Y., additional, Paz, G., additional, Lewit, N., additional, Sendel, H., additional, Khouri, S., additional, Calderon, I., additional, van Gelder, P., additional, Al-Inany, H. G., additional, Antaki, R., additional, Dean, N., additional, Lapensee, L., additional, Racicot, M., additional, Menard, S., additional, Kadoch, I., additional, Meylaerts, L. J., additional, Dreesen, L., additional, Vandersteen, M., additional, Neumann, C., additional, Zollner, U., additional, Kato, K., additional, Segawa, T., additional, Kawachiya, S., additional, Okuno, T., additional, Kobayashi, T., additional, Takehara, Y., additional, Kato, O., additional, Jayaprakasan, K., additional, Nardo, L., additional, Hopkisson, J., additional, Campbell, B., additional, and Raine-Fenning, N., additional

Published
2010
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45. Removal of Heavy Metals from Laboratory Wasteliquid by the Ferrite Process at Different Reaction Temperature.

Author

Huang, Y. J., Lin, C. L., and Tu, C. H.

Abstract

After treatment of laboratory wasteliquid by the ferrite process, the concentration of total chromium and lead in the laboratory wasteliquid was treated from 343,000 ppb and 20.9 ppb, respectively to lower than the effluent standards of the Environmental Protection Administration (EPA) in Taiwan. The Toxicity Characteristic Leaching Procedure (TCLP) test results for total chromium and lead at different reaction temperature was dropped to the TCLP standard of the EPA. X-ray Diffraction (XRD) showed that the total numbers of the spinel-structured of Cr-ferrites was formed at 70°C. The X-ray Absorption Near Edge Structure (XANES) spectra shows that 29.26% of FeOOH and 66.64% of Fe3O4 in the precipitates when reaction temperature was raised up to 70°O, it means that reaction temperature higher than 70°C was better for formation of Fe3O4. The hysteresis loops of precipitates generated from Fe3O4 by the ferrite process at 70°C, resulted in a saturation magnetization of 5.63 emu/g. [ABSTRACT FROM AUTHOR]

Published
2008

49. Densities, Viscosities, Refractive Indices, and Surface Tensions for 12 Flavor Esters from T = 288.15 K to T = 358.15 K

Author

Sheu, Y.-W. and Tu, C.-H.

Abstract

Densities, viscosities, refractive indices, and surface tensions for 12 flavor esters were measured from 288.15 K to 358.15 K at atmospheric pressure. The esters studied were ethyl acetoacetate, isoamyl acetate, ethyl isovalerate, methyl benzoate, ethyl caproate, ethyl benzoate, benzyl acetate, isoamyl butyrate, ethyl salicylate, benzyl propionate, ethyl phenylacetate, and ethyl caprylate. Densities were determined using a vibrating-tube density meter, and viscosities were measured with an automatic Ubbelohde capillary viscometer. Refractive indices were measured using a digital Abbe-type refractometer, and surface tensions were measured using the Wilhelmy-plate method. The experimental data were correlated by temperature-dependent equations.

Published
2005

50. Densities, Viscosities, and Refractive Indices for Binary and Ternary Mixtures of Ethanol, 2-Methylpropan-2-ol, and 2,2,4-Trimethylpentane

Author

Wang, C.-C., Chen, H.-W., and Tu, C.-H.

Abstract

Densities, viscosities, and refractive indices of the ternary system ethanol + 2-methylpropan-2-ol + 2,2,4-trimethylpentane at T = 298.15 K and the binary systems ethanol + 2-methylpropan-2-ol, ethanol + 2,2,4-trimethylpentane, and 2-methylpropan-2-ol + 2,2,4-trimethylpentane were measured at T = (298.15, 308.15, and 318.15) K and atmospheric pressure over the whole composition range. Densities were determined using a vibrating-tube densimeter. Viscosities were measured with an automatic microviscometer based on the rolling ball principle. Refractive indices were measured using a digital Abbe-type refractometer. Excess molar volumes (VE), deviations in the viscosity (Δη) from the mole fraction average, and deviations in the refractive index (ΔnD) from the volume fraction average for the mixtures were derived from experimental data. The binary and ternary data of VE, Δη, and ΔnD were correlated as a function of the mole fraction by using the Redlich−Kister and the Cibulka equations.

Published
2005

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