For You
Click for more
Science
| 19 |
Ohshika, K.
(Graduate School of Science) Kleinian Groups Which are Limits of Geometrically Finite Groups Memoirs of the American Mathematical Society, 177, 1-116+ xii (2005) Ahlfors conjectured in 1964 that the limit set of every finitely generated Kleinian group would either have Lebesgue measure 0 or be the entire sphere. In this monograph we have proved that this conjecture is true for purely loxodromic Kleinian groups which are algebraic limits of geometrically finite groups. What we have directly proved is that every purely loxodromic algebraic limit of geometrically finite groups whose limit set is not the entire sphere is topologically tame. |
|
|
|
| 20 |
Okada, M.
; Goto, S.; Kasai, T.
(Graduate School of Science) Dynamical Steric Effect in the Decomposition of Methyl Chloride on a Silicon Surface Physical Review Letters, 95, 176103/1-4 (2005) We report results of a study on the incident-energy and the surface-temperature dependence of the steric effects in the dissociative adsorption of CH 3 Cl on a Si{100} surface. The initial sticking probability for the Cl-end collision is larger than that in the CH 3 -end collision. Furthermore, this steric preference is sensitive to the kinetic energy of CH 3 Cl and the surface temperature. This study shows that the non-equilibrium surface trapping plays a key role in the decomposition of CH 3 Cl on Si{100}. |
|
|
|
| 21 |
Kanamori, D.;
Okamura, T.
; Yamamoto, H.; Ueyama, N.
(Graduate School of Science) Linear-to-Turn Conformational Switching Induced by Deprotonation of Unsymmetrically Linked Phenolic Oligoamides Angewandte Chemie International Edition, 44, 969-972 (2005) Unsymmetrically linked phenolic oligoamides fold into a turn conformation from a linear conformation by the deprotonation of the phenol groups. Deprotonation induces a rearrangement of the hydrogen-bonding mode within each unit from OH···O=C to NH···O - (oxyanion) such that all of the phenolate O - atoms are directed toward the inside of the turn. |
|
|
|
| 22 |
Sugitani,
I.
*1;
Okuda,
Y.
*1;
Shishido,
H.
*1;
Yamada,
T.
*1;
Thamizhavel,
A.
*1; Yamamoto, E.; Matsuda, T.
D.; Haga, Y.;
Takeuchi,
T.
*2;
Settai,
R.
*1; ôNUKI, Y*1
*1 (Graduate School of Science) *2 (Low Temperature Center) Pressure-Induced Heavy-Fermion Superconductivity in Antiferromagnet CeIrSi 3 without Inversion Symmetry Journal of Physical Society of Japan, 75, 043703/1-4 (2006) |
|
|
|
| 23 |
Matsui, K.; Takizawa, S.;
Sasai, H.
(Institute of Scientific and Industrial Research) Bifunctional Organocatalysts for Enantioselective Aza-Morita-Baylis-Hillman Reaction Journal of the American Chemical Society, 127, 3680-3681 (2005) Rationally designed chiral organocatalysts promote asymmetric reactions to give optically active compounds without the aid of expensive and/or toxic metals. The newly developed acid-base type bifunctional organocatalyst realized an efficient enantioselective aza-Morita-Baylis-Hillman (aza-MBH) reaction of α,β-unsaturated carbonyl compounds with N-tosylimines to give highly functionalized allylamine derivative. The synergy between acid and base functionalities on the organocatalyst is important not only to activate the α,β-unsaturated carbonyl compounds but to control the conformation of the organocatalyst itself. |
|
|
|
| 24 |
Nakamura, K.;
Shikata, T.
; Takahashi, N.; Kanaya, T.
(Graduate School of Science) Highly Extended Conformation of Polyelectrolytes Incorporated into Hybrid Threadlike Micelles Studied by Small Angle Neutron Scattering Journal of the American Chemical Society, 127, 4570-4571 (2005) We have established aqueous supramolecular systems involving long hybrid threadlike micelles consisting of polyelectrolyte and surfactant molecules. In a hybrid threadlike micellar system constructed with a combination of random copolymers of styrene and sodium styrenesulfonate and cetyltrimethyammonium bromide dissolved in deuterium oxide, D 2 O, small angle neutron scattering (SANS) measurements revealed that the polyelectrolytes incorporated into hybrid threadlike micelles, i.e . sheath-like substances, keep a highly extended conformation along the micelles with a radius of 2.3 nm. |
|
|
|
| 25 |
Furukawa, S.; Uji-i, H.;
Tahara, K.
; Ichikawa, T.; Sonoda, M.
; De Schryver, F.C.;
Tobe, Y.
; Dé Feyter, S
(Graduate School of Engineering Science) Molecular Geometry Directed Kagomé and Honeycomb Networks: Toward Two-Dimensional Crystal Engineering Journal of the American Chemical Society, 128, 3502-3503 (2006) |
|
|
|
| 26 |
Ohno, H.; Mizutani,T.; Kadoh, Y.; Miyamura, K.;
Tanaka, T.
(Graduate School of Pharmaceutical Sciences) Thermal Intramolecular [2 + 2] Cycloaddition of Allenenes and Allenynes: Diastereoselective Approach to Bicyclic Heterocycles Angewandte Chemie International Edition, 44, 5113-5115 (2005) A stereoselective route to bicyclo[4.2.0]octane derivatives has been developed by using thermal [2+2] cycloaddition of allenes with an additional multiple bond. This study first demonstrated that unactivated allenenes and allenynes can regioselectively undergo intramolecular [2+2] cycloaddition of the distal double bond of the allene moiety. This simple and environmentally benign process would extend the potential application of fused bicyclic cyclobutane derivatives in synthetic and medicinal chemistry. |
|
|
|
| 27 |
Taniguchi, Y.
; Nishiyama, M.;
Ishii, Y.; Yanagida, T.
(Graduate School of Frontier Biosciences) Entropy Rectifies the Brownian Steps of Kinesin Nature Chemical Biology, 1, 346-351 (2005) |
|
|
|
| 28 |
Ogawa, Y. ;
Toki, H.
; Tamenaga, S.
; Sugimoto, S.; Ikeda, K.
(Research Center for Nuclear Physics) Charge and Parity Projected Relativistic Mean Field Model with Pion for Finite Nuclei Physical Review, C, 034301 (2006) The pion (Yukawa particle) plays an important role for the structure of nucleus. The pion is the Nambu-Goldstone particle of the spontaneous chiral symmetry breaking and hence the use of the chiral symmetric Lagrangian for the nuclear physics indicates unification of the quark, hadron and nuclear physics. We developed the formalism for the treatment of the pion for nuclear physics by introducing the charge and parity projection in the relativistic mean field model. We apply the theoretical framework to the structure of 4 He nucleus and find satisfactory results. The chiral symmetry seems to be recovered by about 20% in the nucleus and the pion is playing the major role for the construction of the nucleus. |
|
|
|
Backward
|
2 of 2 |
share !