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41.
42.
Takeshi Furuta Shuichi Ikefuji Koujirou Tokunaga Tze Loon Neoh Hidefumi Yoshii 《Journal of inclusion phenomena and macrocyclic chemistry》2007,57(1-4):21-27
Recently, air and ground water pollution and contamination of soil by toluene have been drawing increasing attention and became
an urgently important problem in environmental pollution. Hence, the development of highly sophisticated removal techniques
of toluene is required for the global environmental preservation. Since toluene is a highly volatile material, it is difficult
to treat it by usual activated sludge water treatment. In this study, in order to prevent volatilization of toluene, randomly
methylated β-cyclodextrin (RM-β-CD) was used to complex with toluene and by reason of that, facilitates the biodegradation
of toluene by activated sludge. The enhanced effect of RM-β-CD for the biodegradation of toluene by activated sludge was studied
in batch systems. The addition of RM-β-CD dominantly promoted proliferation of activated sludge. This implied that the addition
of RM-β-CD prevented toluene from evaporating during treatment, and as a result, toluene was effectively decomposed by the
activated sludge. 相似文献
43.
Midori O. Ishitsuka Hidefumi Nikawa Takahiro Tsuchiya Michael T.H. Liu 《Tetrahedron letters》2007,48(5):859-861
By employing C60 as a chemical probe, the photolysis of benzylchlorodiazirine has been proposed to form carbene and the rearranged products via the excited state. 相似文献
44.
Hidefumi Yoshii Aya Sakane Daisuke Kawamura Tze Loon Neoh Hayato Kajiwara Takeshi Furuta 《Journal of inclusion phenomena and macrocyclic chemistry》2007,57(1-4):591-596
The release kinetics of (−)-menthol from chewing gum was investigated using various encapsulated powder of (−)-menthol. The
apparatus of flavor release of chewing gum was made with a glass container of mashing homogenizer. Flavor release behavior
could be correlated with Avrami’s equation. Chewing gum containing (−)-menthol/γ-CD complex powder had longer retention of
(−)-menthol compared with the β-CD complex powder and the (−)-menthol encapsulated in modified starches. The activation energies
of (−)-menthol release from chewing gum were 106 kJ/mol for γ-CD complex and 74 kJ/mol for (−)-menthol/β-CD complex powder
and emulsified (−)-menthol encapsulated in HI-CAP, respectively. 相似文献
45.
46.
Naoki Toshima Keiichi Kanaka Makoto Komiyama Hidefumi Hirai 《高分子科学杂志,A辑:纯化学与应用化学》2013,50(10-11):1349-1366
Interactions between polystyrene and aluminum copper(I) chloride (AlCuCl4) were investigated by various spectroscopic measurements in order to elucidate the structure of polystyrene-AlCuCl4 complex in solution and the mechanism of water resistance of the complex as a carbon monoxide absorbent. The chemical shift (101 ppm) and half line width (145 Hz) of AlCuCl4 in benzene by 27Al-NMR suggest a dimer structure bridged by two chlorine atoms, which is almost identical with that of aluminum chloride. The coordination of benzene or other aromatic compounds to AlCuCl4 was confirmed by charge-transfer bands in UV and visible absorptions. The equilibrium constants (K) for complex formation of AlCuCl4 with various aromatic compounds were determined by 13C-NMR spectroscopy. In the case of AlCuCl4 and benzene in 1,2-dichloroethane, for example, K is 2.2 M ?1 at 303 K. For the polymer complex solution and 1,3-diphenyl-propane solution, strong charge-transfer bands have been observed in the wavelength region at about 380 to 500 nm, where no band is observed in benzene derivatives. This strong charge-transfer band is considered to be due to the strong interaction of AlCuCl4 with adjacent aromatic rings of polystyrene or 1,3-diphenylpropane of a chelate type, which, as a result, causes the water resistance of the present carbon monoxide absorbent system. 相似文献
47.
48.
Cooperative Activation with Chiral Nucleophilic Catalysts and N‐Haloimides: Enantioselective Iodolactonization of 4‐Arylmethyl‐4‐pentenoic Acids 下载免费PDF全文
Dr. Hidefumi Nakatsuji Yasuhiro Sawamura Prof. Dr. Akira Sakakura Prof. Dr. Kazuaki Ishihara 《Angewandte Chemie (International ed. in English)》2014,53(27):6974-6977
Chiral triaryl phosphates promote the enantioselective iodolactonization of 4‐substituted 4‐pentenoic acids to give the corresponding iodolactones in high yields with high enantioselectivity. N‐Chlorophthalimide (NCP) is employed as a Lewis acidic activator and oxidant of I2 for the present iodolactonization. In combination with 1.5 equivalents of NCP, only 0.5 equivalents of I2 are sufficient to generate the iodinating reagent. 相似文献
49.
Akasaka T Lu X Kuga H Nikawa H Mizorogi N Slanina Z Tsuchiya T Yoza K Nagase S 《Angewandte Chemie (International ed. in English)》2010,49(50):9715-9719