Ueno method

Ueno, K. Kina, K. Colloid Titration—A Rapid Method for the Determination of Charged Colloid, /. Chem. Educ. 

The ketene—crotonaldehyde route through polyester with various modifications and improvements is reportedly practiced by Hoechst Celanese, Cheminova, Daicel, Ueno, Chisso, Nippon Gohsei, and Eastman Chemical Company. Differences in thein processes consist mosdy in the methods of polyester splitting and first-stage purification. Production of the potassium salt can be from finished sorbic acid or from a stream in the sorbic acid production route before the final drying step. Several patents on the process for producing sorbic acid and potassium sorbate from this route are given in the hterature. 

Saji, T. Hiraga, T. Moritani, T. Tanaka, N. Yanagimoto, H. Ueno, I. Tsujita, K. 2001. Production method of organic thin film and optical component. Agency of Industrial Sciences and Technology, Japan Dainichi Seika Kogyo K. K. Victor Co. of Japan. Japanese Patent 2001-003195, pp. 1-20. 

Some of the first transient infrared data on heterogeneous catalysis were gathered by Heyne and Tomkins in 1966 (16). The method has been advocated and used by Tamaru, who has recently reviewed his work since 1967 in this field (17). Dent and Kokes used the transient method in IR studies in 1970 (18). Since then the method has been applied to kinetic studies in particular by Ueno et al. (19, 20) and most recently by Savatsky and Bell (21). 

Ever since 1962, when Williams, Okamura, and their associates started to publish propagation rate-constants k+p for the cationic bulk polymerization of cyclo-pentadiene, isobutene, styrene, a-methylstyrene and isopropylvinyl ether by ionizing radiations, these constants have been accepted as the best, most likely, values for the k+p of unpaired cations in a medium of low-polarity, and those obtained subsequently by Stannett and his collaborators, using similar methods, enjoyed the same status, (The loci classici are Bates et al. (1962), Bonin et al. (1964), Taylor Williams (1969) and the three papers by Ueno et al. (1967), Hayashi et al. (1967) and Williams et al. (1967).)... 

Since vm vs, the fact that I13 is positive shows that km > ks, which is in agreement with the results obtained by the original authors by a slightly different method (Ueno et al. 1966). 

After Williams initial reports (Bonin etal., 1965 Hubman etal., 1966), the most detailed account of the methods used for determining kp+ is in the group of three papers resulting from the cooperation of Williams with Okamura s group in Kyoto (Ueno et al., 1967 Hayashi et al., 1967 Williams et al., 1967) in these the kp+ of styrene, a-methylstyrene and isobutyl vinyl ether were reported. The bulk polymerisation of styrene and of a-methylstyrene gave kp+ values of the same order of magnitude (ca. 106) and two orders of magnitude less than those for cyclopentadiene and isobutene the same is true for our kpi shown in Table 1. 

Ueno and Hartwig subsequently improved upon this method by developing conditions for allylic alkoxylation that do not require copper additives [97]. In reactions conducted with la generated in sim as catalyst and K3PO4 as base,... 

R Ueno, T Aoki. High-performance liquid chromatographic method for the rapid and simultaneous determination of sulfamonomethoxine, miloxacin and oxolinic acid in serum and muscle of cultured fish. J Chromatogr B 682 179-181, 1996. 

The cyclizations of halo acetals, introduced by Stork66 and Ueno,67 are among the most popular of all radical methods because the precursors are easy to prepare, the cyclizations are very rapid, and the products can be converted to a variety of different heterocycles. The conversion of (26) to (28 Scheme 17) illustrates the basic procedure.68 Standard bromoacetalization of an alcohol provides the precursor (27). After tin hydride cyclization and acidic oxidation, lactone (28) is formed in excellent yield with 97%... 

In 1976, Ueno and Okawara highlighted the fact that no oxidation of primary saturated alcohols to aldehydes via tin alkoxides had been reported in the literature and published a procedure for the selective oxidation of secondary alcohols.25 Interestingly, rather than performing the oxidation on pre-formed tin alkoxides, these researchers subjected a mixture of the diol and (Bu3Sn)20 in CH2C12 to the action of Br2. Regardless of the fact that no complete formation of tin alkoxides is secured and no HBr quencher is added, this method may provide useful yields of hydroxyketones during the selective oxidation of diols.26... 

Horiuchi, T., Ueno, Y., Niwa, O., Micro-fluidic device for detection and identification of aromatic VOCs by optical method. Micro Total Analysis Systems, Proceedings 5th pTAS1 Symposium, Monterey, CA, Oct. 21-25, 2001, 527-528. 

Nl. Nakajima, K., Mochida, H., Ueno, T., Suzuki, M., Kobayashi, I., Matsuda, I., and Miyai, K., A simple, rapid method of blood thyroxine assay using a fluorescence polarization technique. Proc. Symp. Chem. Physiol. Pathol. Annu. Meet. Jpn. Soc. Clin. Chem. 18, 30-35 (1978). 

Yang JW, Hechavarria Fonseca MT, List B (2005) Catalytic asymmetric reductive Michael cyclization. J Am Chem Soc 127 15036-15037 Yoshikawa N, Chiba N, Mikawa T, Ueno S, Harimaya K, Iwata M (1994) Mitsubishi Chemical Industries patent. Jpn Kokai Tokkyo Koho JP 0630600 Zeitler K (2005) Extending mechanistic routes in heterazolium catalysis— promising concepts for versatile synthetic methods. Angew Chem Int Ed Engl 44 7506-7510... 

Ozeki, N. Oka, H. Ito, Y. Ueno, E. Goto, T. Hayashi, T. Itakura, Y. Ito, T. Maruyama, T. Tsuruta, M. Miyazawa, T. Matsumoto, H. A reversed-phase thin-layer chromato-graphy/scanning densitometric method for the analysis of gardenia yellow in food using crocetin as an indicator. J. Liq. Chromatogr. 2001, 24, 2849 - 2860. 

Kondo, F. Matsumoto, H. Yamada, S. Tsuji, K Ueno, Y. Harada, K.-I. Immunoaffmity purification method for detection and identification of microcystins in lake water. Toxicon 2000, 38, 813 - 823. 

E Yonemochi, Y Ueno, T Ohmae, T Oguchi, S-I Nakajima, K Yamamoto. Evaluation of amorphous ursodeoxycholic acid by thermal methods. Pharm Res 14 798-... 

Simultaneously and independently, proof of the structure of Substance F by similar methods was obtained in Japan by Ueno (301, 372-375) and in Russia by Kiselev (376) and Kiselev and Men shikov (377). 

Corminboeuf, Renaud and Schiesser explored the applicability of various quantum methods to the diastereoselective radical cyclization of several bromoacetals during the Ueno-Stork reaction (Scheme 10) [22]. It is interesting to note the performance of the various methods. All of the methods employed correctly predict the anomeric affect (transition states 61, 62 were calculated to lie some 20 kJ mol above 59, 60) and the observed cis stereochemistry [23]. However, only a handful of... 

A sediment core was sampled from the middle of Lake Shinji in 1994 and the radioactivity concentrations of Cs and Pb were analyzed. Details of the sampling and radioactivity measurement are described by Ueno et al., 1997 an interpretative method is described below (see Fig. 6). The depth profile of Cs in the lake bottom sediment was dated using a Pb profile. This dated profile of Cs was then assigned to each year by interpolation of the measured concentrations of Cs in a sediment core to estimate the annual sedimentation flux of Cs. The fallout records of Cs in the studied area (Shimane Prefecture) were obtained from the literature (Kasai et al., 1986 MRI, 1996 Yanase et al., unpublished data). A similar method of interpretation was adopted by McHenry et al. (1973) and was explained by Wise (1980). 

Tomita and Ueno studied the infrared spectra of metal complexes of NTA, using the method described above. They concluded that NTA... 

Hibara, A., Iwayama, S., Matsuoka, S., Ueno, M., Kikutani, Y, Tokeshi, M. and Kitamori, T., Surface modification method of microchannels for gas-liquid two phase flow in microchips. Anal Chem, 11, 943, 2005. 

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