Yamamoto studies

Y. Yamamoto. Studies on Amperometric Ion-Selective Electrode Sensors. PhD Thesis, Kyoto University, Kyoto 1991. 

Potassium chlorate becomes quite sensitive in contact with red phosphorus and ignites very easily by friction. These properties are used in match. When it is mixed with sulphur or compounds of sulphur like realgar, antimony trisulphide etc., the sensitivity to shock or friction is highly increased. According to the late professor S.Yamamoto of Tokyo University, when a mixture of potassium chlorate and realgar was shaped into a small tablet in a hand press and left on a table, a little while later the tablet caused spontaneous ignition and burnt out. He tried the same tests sevejjral times and the results were the same. He concluded that it was caused by inner friction which occurs with the recovery of the stress produced by the press(s. Yamamoto Studies in safety in firework manufacture 1(1959)3 ... 

V/hen potassium perchlorate is added to hydrochloric acid or nitric acid, it causes no reaction. With cone, sulphuric acid it smells only slightly of CIO this is caused by some impurity such as KCl. The mixture of potassium perchlorate, and sulphide cannot be immediately ignited by adding cone, sulphuric acid this is a principal difference from the potassium chlorate mixtureCS.Yamamoto Studies in safety in firework manufacture, I, p.2 (1959)) ... 

Quinazoline is relatively stable in aqueous solutions over a wide range of pH values. At 90°C, on the other hand, it is degraded and the products that are formed react with each other. Albert and Yamamoto studied the stability of quinazoline at pH values ranging from Hq — 4 to pH 14. They found that in aqueous solution at pH values between 5 and 12 quinazoline was relatively stable, whereas above and below these limits decomposition was extensive. Five main products were isolated and characterized from acidic solutions. These were o-aminobenzaldehyde, the anhydro trimer (31 R = H, = OH), the anhydro tetramer [31 R = H R = -NHC6H4CHO(o)], the monoformyl tetramer [31 R = CHO R = -NHC6H4CHO(o)], and substance Q. Substance Q was shown to be a polymer of the addition... 

R. Yamamoto, Studies on the stability of dry preparations. VIII. Relation between the moisture content and stability of ascorbic acid, sodium ascorbate and their diluted preparations [in Japanese], Yakuzaigaku 19, 39-43 (1959). 

T. Takahashi and R. Yamamoto, Studies on the stability of vitamin D2 powder preparations. I. Relationship between surface acidity of excipients and isomerization of vitamin D2 (1) [in Japanese], Yakugaku Zasshi 89, 909-913(1969). 

Onishi, I. and K. Yamamoto Studies on the essential oils of tobacco leaves. Part III. Phenol fraction Bull. Agr. Chem. Soc. Japan 19 (1955) 148-156 Part VI. Phenol fraction (II) Bull. Agr. Chem. Soc. Japan 20 (1956) 70-73 Part XL Phenol fraction (III) Bull. Agr. Chem. Soc. Japan 21 (1957) 90-94 Part XIV Phenol fraction (IV) Bull. Agr. Chem. Soc. Japan 21 (1957) 181-194. Onishi, I. and K. Yamasaki Studies on the essential oils of tobacco leaves. Part 1. Acid fraction Bull. Agr. Chem. Soc. Japan 19 (1955) 137-142 Part IX. Acid fraction of the American flue-cured tobacco leaf BuU. Agr. Chem. Soc. Japan 21 (1957) 82-85 PartX. Acid fraction in the essential oil of the Japanese Uue-cured leaf before redrying and aging BuU. Agr. Chem. Soc. Japan 21 (1957) 86-89. 

Yamamoto, I., K. Nitta, and Y. Yamamoto Studies on the metabohc products of Oospora sp. Part. II. Chemical structure of oospolactone. J. Agr. Biol. Chem. Japan 25, 405 (1961). 

Jarvis S P, Yamamoto S-l, Yamada H, Tokumoto H and Pethica J B 1997 Tip-surface interactions studied using a force controlled atomic force microscope in ultrahigh vacuum Appl. Phys. Lett. 70 2238... 

Yamamoto et al. also coupled gel permeation HPLC and CE in an on-line fashion in 1990, where capillary isotachophoresis was again used in the second dimension. This technique was also not comprehensive due to the loss of resolution between the techniques. It was also not particularly fast, with a 23 min CE cycle, which was repeated 90 times throughout the HPLC run (14). Volume incompatibility between HPLC and CE was one problem not addressed in this study, in which a large HPLC column was coupled to an electrophoresis capillary. 

S. Hosoda, A. Uemura, Y. Shigematsu, I. Yamamoto, and K. Kojima, Studies in Surface Science and Catalyst 89, Catalyst Design for Tailor-Made Polyolefins, (K. Soga, and M. Teruno, eds.), Elsevier Science BV., The Netherlands, p. 365 (1994). 

The anodic behavior of carbon materials, such as acetylene black, activated carbon, and vapor-grown carbon fiber, in LiC104/PC solution was studied by Yamamoto et al. [102]. Irreversible reactions, including gas evolution and disintegration, were mainly observed on that part of the surface occupied by the edge planes of the... 

Furusawa and Yamamoto [16] studied the adsorption process of polystyrene samples (M ranging from 16700 to 2xl06) with narrow molecular weight distribution (Mw/M = 1.01-1.07) at the -conditions (cyclohexane, 35 °C). Controlled pore glass with pore diameter of 1000 A was used as an adsorbent. 

One study showed that the Cram s mle product predominates with metal hydride reducing agents, but the other product with Bouveault-Blanc and dissolving metal reductions Yamamoto, Y. Matsuoka, K. Nemoto, H. J. Am. Chem. Soc., 1988, 110, 4475. 

The work on insertion reactions of isocyanides was initiated by Yamamoto et ah, and described in a communication in 1968 followed by a full paper a year later (164). This study described the reaction of C5H5Ni(PPh3)CH3 with several isocyanides, from which the products C5HjNi(CNR)- C(=NR)CH3 were isolated [Eq. (2)]. 

In most studies, phytoestrogen intake has been estimated by direct methods that evaluate food intake either by recall (food-frequency questionnaires -FFQs) or by record (food diary), and subsequently by composition databases based on information of this kind. Food-frequency questionnaires are widely administered to subjects involved in epidemiological studies. Their validity and reproducibility is considered sufficient when statistically correlated to data obtained from dietary records (a properly-completed and comprehensive food diary) and from analysis of blood and urine samples (Kirk et ah, 1999 Huang et al, 2000 Yamamoto et al, 2001 Verkasalo et al, 2001). FFQs can be repeated several times a year and may be administered to large populations. Such an approach provides an easy and low-cost method of assessing the... 

NAKAZAWA s, iMAi K, YAMAMOTO Y (1977) Clinical studies on y-oryzanol in the treatment of autonomic instability with abdominal symptoms. Japanese J. Psychosom Med, 17(4) 101-108. 

Maki Y, S Yamamoto, M Nozaki, O Hayaishi (1969) Studies on monooxygenases II. Crystallization and some properties of imidazole acetate monooxygenase. J Biol Chem 244 2942-2950. 

Urayama, K., Yamamoto, S., Tsujii, Y, Fukuda, T. and Neher, D. (2002) Elastic properties of well-defined, high-density poly(methyl methacrylate) brushes studied by electromechanical interferometry. Macromolecules, 35, 9459-9465. 

Horinaka, J., Ono, K. and Yamamoto, M. (1995) Local chain dynamics of syndiotactic poly(methyl methacrylate) studied by the fluorescence depolarization method. Polym. J., 27, 429-435. 

Mineralogical characteristics of Besshi-subtype deposits (e.g., Besshi deposit) were described by Kase (1972, 1977, 1986) and Kase and Yamamoto (1988). Their studies are described below. 

A large number of sulfur isotope data on the Besshi-type deposits are available, although the variation in individual deposit has not been studied well (Yamamoto et al., 1968, 1984a,b Kajiwara and Date, 1971 Miyake and Sasaki, 1980) (Fig. 2.52). The sulfur isotopic compositions of sulfides are different in different regions. 

Kase, K. and Yamamoto, M. (1985) Geochemical study of conformable massive sulfide deposits of the Hitachi mine, Ibaraki Prefecture, Japan. Mining Geology, 35, 17-29. 

On the other hand, several examples of chiral sulfonamides derived from ehiral a-amino acids have been successfully employed as ligands for enantio-seleetive Diels-Alder reactions. Thus, Yamamoto and Takasu have easily prepared new chiral Lewis acids from borane and sulfonamides of various ehiral a-amino acids, which were further studied for their abilities to promote the enantioselective Diels-Alder reaction between methacrolein and 2,3-dime-thyl-1,3-butadiene. Since 2,4,6-triisopropylbenzenesulfonamide of a-amino-butyric acid gave the highest enantioseleetivity, this eatalyst was applied to the... 

Yamamoto, H.Y., Nakayama, T.O.M., and Chichester, C.0.1962. Studies on the light and dark interconversions of leaf xanthophy 11s. Arch. Biochem. Biophys. 97 168-73. 

Kasumi A, Sako Y, Yamamoto M (1993) Confined lateral diffusion of membrane receptors as studied by single particle tracking (nanovid microscopy. Effects of calcium-induced differentiation in cultured epithelial cells. Biophys J 65 2021-2040... 

Jewsbury, P., S. Yamamoto, T. Minato, M. Saito, and T. Kitagawa. 1994. The Proximal Residue Largely Determines the CO Distortion in Carbonmonoxy Globin Proteins. An Ab Initio Study of a Heme Prosthetic Unit. J. Am. Chem. Soc. 116, 11586-11587. 

---