Polymerisation von 4-Vinylpyridin in Gegenwart von Poly(4-vinyloxycarbonylphthals?ureanhydrid)

Ohne Zusammenfassung     

Asymmetrie der Hauptkette von Poly-9-0-methacryloylchinin

Ohne Zusammenfassung     

Determination of 13C abundance in trace amounts of plant metabolites by the infrared 13CO2 analyzer

The infrared 13CO2 analyzer was improved to measure the 13C abundance in the trace amounts of plant metabolites separated by high performance liquid chromatography (HPLC). To improve the sensitivity to 12C, the range of wave number of 2 360 +/- 10 cm-1 was used for 12C determination. Free carbohydrates in corn leaves fed 13CO2 were separated by HPLC and the 13C abundances in sucrose, glucose and fructose were determined by this improved method. The samples containing 10-40 micrograms of carbon could be successfully analysed.     

Study of charmless hadronic B meson decays to pseudoscalar-vector final states

We report results of searches for charmless hadronic B meson decays to pseudoscalar( pi(+/-), K+/-, pi(0), or K(0)(S))-vector( rho, K(*), or omega) final states. By using 9.7x10(6) BB pairs collected with the CLEO detector, we report the first observation of B(-)--->pi(-)rho(0), B(0)-->pi(+/-)rho(-/+), and B(-)-->pi(-)omega, which are expected to be dominated by hadronic b-->u transitions. The measured branching fractions are (10.4(+3.3)(-3.4)+/-2.1)x10(-6), (27.6(+8.4)(-7.4)+/-4.2)x10(-6), and (11.3(+3.3)(-2.9)+/-1. 4)x10(-6), respectively. Branching fraction upper limits are set for all of the other decay modes investigated.     

Radiation induced synthesis of gold/iron-oxide composite nanoparticles using high-energy electron beam

Composite nanoparticles consisting of gold and iron oxide were synthesized in aqueous solution systems by using a high-energy electron beam. The electron irradiation induces radiation-chemical reaction to form metallic gold nanoparticles. These gold nanoparticles were firmly immobilized on the surface of the support iron oxide nanoparticles. Surface of the support iron oxide nanoparticles are almost fully coated with fine gold nanoparticles. The size of these gold nanoparticles depended on the concentrations of gold ions, polymers and iron oxide nanoparticles in the solutions before the irradiation.     

Broad band infrared near-field spectroscopy at finger print region using SPring-8

The authors report infrared near-field spectroscopy using synchrotron radiation at BL43IR, SPring-8 in the finger print region. At the microspectroscopy station, the infrared synchrotron radiation beam is focused on a cantilever probe with a 3 μm square aperture. A comb-shaped Au electrode with the width of 3 μm and the distance of 3 μm is used for the reflection measurement. The Au electrodes can be resolved at 650 cm⁻¹ and the resolution is estimated to be λ/5.