F. Ambe

RIKEN, Вако, Saitama, Japan

Are you F. Ambe?

Claim your profile

Publications (159)315.04 Total impact

    [Show abstract] [Hide abstract]
    ABSTRACT: ChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 100 leading journals. To access a ChemInform Abstract of an article which was published elsewhere, please select a “Full Text” option. The original article is trackable via the “References” option.
    ChemInform 01/2010; 24(4). DOI:10.1002/chin.199304007
  • Zheng Chang · Shizuko Ambe · Kazuya Takahashi · Fumitoshi Ambe ·
    [Show abstract] [Hide abstract]
    ABSTRACT: A method combining radioactive 'multitracer' and dialysis techniques was developed to study the binding of multiple metal ions to humic acid (HA). Technical problems such as the leakage of small-molecule HA segment and the slow diffusion of metal ions through the dialysis membranes were examined. Under the condition of pH = 4.0, I = 0.100 M NaNO3, [MgII] = 0 M, or [MgII] = 0.500 × 10-3 M, the interactions between Inogashira humic acid and metal ions (BeII, ScIII, ZnII, CoII, MnII and SrII) were investigated by varying the metal concentrations in a wide range. It was found that as the concentrations of the trace metals are significantly smaller than that of HA, there are abundant binding sites available and there are no competition interactions between the trace metal ions of interest. Therefore, the stability constants for multiple metal ions binding onto humic substances can be obtained readily using the present method. The method is useful for quickly determining trace metal binding onto humic substances in environmental chemistry.
    Radiochimica Acta 01/2006; 94(1/2006). DOI:10.1524/ract.2006.94.1.37 · 1.01 Impact Factor
  • Shizuko Ambe · Daisuke Abe · Takuo Ozaki · Fumitoshi Ambe ·
    [Show abstract] [Hide abstract]
    ABSTRACT: The simultaneous permeation of Sc, Y, Ce, Pm, Eu, Gd, Yb and Lu through a 2-ethylhexyl phosphonic acid-2-ethylhexyl ester (EHEHPA)-decalin membrane supported on a microporous polytetralluoroethylene sheet was studied using a multitracer. The permeation rates of the elements from feed solutions of various acidity into receiving solutions of 2 mol dm(-3) HCl were determined. The feed solution at pH 1.5 gave the highest percentage of permeation for Ce, Pm, Eu, Gd and Yb. amounting to about 90% after 25-h permeation. The percentage of permeation of Y and Lu was the highest at pH 1, amounting to about 90% after 25-h permeation. The permeation of Sc from all the feed solutions was less than 4% due to its adsorption on the vessel. The permeation from the feed solution at pH 1.5 into the receiving solutions of 1, 2, 3, 4 and 5 mol dm(-3) HCl showed that the maximum percentage of transport for Y and Yb was obtained in 2 mol dm(-3) HCl receiving solution and that for Lu in 2-4 mol dm(-3) HCl receiving solutions. The other elements gave a percentage of transport more than 90% in 1-5 mol dm(-3) HCl receiving solutions, showing no obvious HCl concentration effect. The permeability coefficients of these elements were determined. Solvent extraction of the elements by EHEHPA-decalin was also carried out for comparison.
    Radiochimica Acta 04/2003; 91(4):217-222. DOI:10.1524/ract. · 1.01 Impact Factor
  • S. Ambe · O. Katayama · F. Ambe ·
    [Show abstract] [Hide abstract]
    ABSTRACT: The permeation of various elements through a tributyl phosphate (TBP)-decalin membrane supported on a microporous polytetrafluoroethylene sheet was studied using a multitracer. Permeation rates of elements from feed solutions to distilled water as a receiving agent were determined by changing the HCl concentration in feed solutions. An increase in the transport was observed for most of the elements studied with increasing HCl concentration in the feed solutions. Among them, Fe, Zn, Se, Zr, Nb, Te, Hf and Re gave relatively high percentages of permeation from 4-12 mol.dm-3 HCl feed solutions. The permeability coefficients of these elements were determined.
    Journal of Radioanalytical and Nuclear Chemistry 09/2002; 253(3):351-355. DOI:10.1023/A:1020496831153 · 1.03 Impact Factor
  • H. F. Wang · Shizuko Ambe · N. Takematsu · Fumitoshi Ambe ·
    [Show abstract] [Hide abstract]
    ABSTRACT: Using a multitracer technique, the effects of acid rain pH on the adsorption of 15 trace elements on soil were studied. Kaolin, forest soil (original and with partially removed oxides), black soil (original and without organic matter) and Kureha soil (original, with partially removed oxides, and without organic matter) were employed as the adsorbents. Instead of H2SO4 solution, HCl solution was selected as the model acid rain based on the results of adsorption experiments on kaolin. In general, the percentage adsorption of cationic elements on three original soils and kaolin increased with increasing pH. The adsorption of oxyanionic elements, As and Se, on three soils was high over the entire pH range studied, while that on kaolin was low and decreased with an increase in pH. The differences in the physical and chemical properties of soils were reflected on the adsorption. The organic matter in soil had positive effects on the extent of adsorption of most elements studied, while the oxides apparently showed positive effects only for Fe and Se adsorption. The results indicate that acid rain decreases the retention of cations in soil and that it increases or does not change the adsorption of anions.
    Radiochimica Acta 01/2001; 89(2). DOI:10.1524/ract.2001.89.2.101 · 1.01 Impact Factor
  • Shizuko Ambe · Takuo Ozaki · R. G. Weginwar · S. Enomoto · Fumitoshi Ambe ·

    Radiochimica Acta 01/2001; 89(2/2001). DOI:10.1524/ract.2001.89.2.063 · 1.01 Impact Factor
  • [Show abstract] [Hide abstract]
    ABSTRACT: The Fe atoms in the SWNTs soot produced from a C rod with Fe-Ni metal by the arc-discharge method were studied for their chem. species by Mossbauer spectroscopy. They were found present as a mixt. of some Fe-Ni alloys and the $alpha$-Fe metal particles of sizes >10nm that were dispersed. No change was obsd. in the Mossbauer spectra by the treatment of the soot with 1M HCl but a drastic temp. dependence of the spectra obsd. for the samples burned in air indicated that >50% of the Fe was oxidized to Fe2O3 in small particles of <10nm. Effects of acid leaching and baking commonly used for sepn. of SWNTs were quant. studied using a radiotracer. Effectiveness of various kinds of metal atoms for forming nano-network materials were also studied by taking advantage of the use of multi-radiotracers. A clear dependence of the yield of metal-contg. fullerene species on the b.p. of the metal was indicated, and the yields were found sensitively affected by the amt. of the current at the time of d.c. arc-discharge for the metal elements that were known to take +2 oxidn. state in M@C82. [on SciFinder(R)]
    01/2001; 590(Nanonetwork Materials):313-316. DOI:10.1063/1.1420115
  • I Tanaka · S Nasu · F E Fujita · F Ambe · S Ambe · T Okada ·
    [Show abstract] [Hide abstract]
    ABSTRACT: 119Sb emission Mossbauer spectra are measured for very dilute, quenched Au-Sb alloys. Two distinct satellite lines observed after quenching and subsequent annealings were assigned to vacancy-solute pairs and vacancy-solute clusters, respectively. Their electronic state and behaviour are investigated during annealing. The effect of oxidation was also examined and separated from that of vacancy-solute interactions in the analysis.
    Journal of Physics F Metal Physics 11/2000; 16(7):L151. DOI:10.1088/0305-4608/16/7/007
  • [Show abstract] [Hide abstract]
    ABSTRACT: The effect of arbuscular mycorrhizal (AM) colonization on the uptake of trace elements in marigold (Tagetes patula L.) was studied using a multitracer consisting of radionuclides of Be, Na, Sc, Cr, Mn, Fe, Co, Zn, As, Se, Rb, Sr, Y, Zr, and Tc. Marigold plants were grown under controlled environmental conditions in sand culture either without mycorrhizas or in association with an AM fungus, Glomus etunicatum. The multitracer was applied to the pot, and plants were harvested at 7 and 21 d after tracer application. We found that the uptake of Be, Na, Cr, Fe, Zn, and Tc was higher in the mycorrhizal marigolds than in the non-mycorrhizal ones, while that of Sc, Co, Rb, and Sr was lower in the mycorrhizal marigolds than in the non-mycorrhizal ones. Thus, the multitracer technique enabled to analyze the uptake of various elements by plant simultaneously. It is suggested that this technique could be used to analyze the effects of AM colonization on the uptake of trace elements by plant.
  • [Show abstract] [Hide abstract]
    ABSTRACT: Cross sections for the production of target fragments in the reactions of iron with 135 MeV/nucleon 12C and 80 MeV/nucleon 16O ions have been measured by off-line γ-ray spectroscopy. Through these data, the mass yield distributions have been obtained. The result of the experiment for the reaction with 135 MeV/nucleon 12C ions is compared with theoretical calculations using the fusion-fragmentation model and the GEMINI code for sequential binary decay, following a calculation with the fireball model.
    European Physical Journal A 03/2000; 7(3). DOI:10.1007/PL00013623 · 2.74 Impact Factor
  • [Show abstract] [Hide abstract]
    ABSTRACT: Lanthanum was demonstrated to be beneficial to the growth of Dryopteris erythrosora, a fern species which accumulates rare earth elements (REEs) under natural conditions. The enhancement of its growth by La was much greater than that by Ca. The uptake rates of REEs were evaluated to be higher than that of Zn and almost equal to those of Sr and Co. The region in the mesophyll where REEs were concentrated was not the same as that of Ca. In mesophyll cells, REEs were observed mainly in chloroplasts. These observations suggest that REEs do not behave as a ‹super Ca› as was suggested for some plants, but that they are transferred to chloroplasts by special mechanisms, possibly for fulfilling yet unknown functions or being stored as a mechanism of detoxification.
    Journal of Plant Physiology 03/2000; 156(3):330–334. DOI:10.1016/S0176-1617(00)80070-X · 2.56 Impact Factor
  • [Show abstract] [Hide abstract]
    ABSTRACT: Target residues from the interaction of copper with 40MeV/nucleon 40Ar ions have been studied using thick-target, thick-catcher recoil techniques. Cross sections and average forward ranges were measured for 42 products. The data were used to obtain the mass yield distribution, the linear momentum transfer, and the excitation energy of composite systems. Comparison to similar studies for the interaction of copper with 12C ions at the same projectile energy per nucleon shows that the linear momentum transfer in central collisions depends strongly on the projectile mass.
    Journal of Radioanalytical and Nuclear Chemistry 03/2000; 243(3):797-801. DOI:10.1023/A:1010663512895 · 1.03 Impact Factor
  • F. Ambe ·
    [Show abstract] [Hide abstract]
    ABSTRACT: The multitracer technique using heavy-ion reactions has successfully developed in the last decade and is expected to widen its application in chemistry, biochemistry and other fields with technical improvement in future. Several examples of recent application are reviewed and development in the coming century is forecast.
    Journal of Radioanalytical and Nuclear Chemistry 01/2000; 243(1):21-25. DOI:10.1023/A:1006746625797 · 1.03 Impact Factor

  • European Physical Journal A 01/2000; 7(3). DOI:10.1007/s100500050408 · 2.74 Impact Factor
  • [Show abstract] [Hide abstract]
    ABSTRACT: To estimate the applicability of yeastSaccharomyces cerevisiae as a radioisotope accumulator, biosorption of 18 radionuclides (isotopes of Be, Na, Sc, V, Cr, Mn, Fe, Co, Zn, As, Se, Rb, Sr, Y, Zr, Tc, Ru, and Rh) by the cells was tested using a multitracer technique. This technique enables us to examine the uptake of various elements under an identical condition. We showed that the yeast has ability to take up radioactive tracers of Be, Sc, V, Cr, Mn, Fe, Co, Zn, As, Se, Sr, Y, Zr, Ru, and Rh from an aqueous environment. Tracers of Be, Sc, Mn, Co, Zn, Se, Sr, Y, and Zr were distributed in both cell walls and other cell parts. Moreover, tracers of Sc, Mn, Co, Zn, Se, Sr, and Y were present as soluble and insoluble forms, and most of the Be and Zr were present as an insoluble form in the cells.
    Biological Trace Element Research 12/1999; 71-72(1):639-639. DOI:10.1007/BF02784255 · 1.75 Impact Factor
  • [Show abstract] [Hide abstract]
    ABSTRACT: The subcellular distribution of radionuclides in Glycine max Merr. (soybean) and Cucumis sativus L. (cucumber) and translocation of plant absorbed radionuclides with growth in soybean were studied. More than 60% of cellular incorporated Rb, Sr, Mn, Co, Nb, and Se remained in the supernatant fraction; 55% and 20% of Cr was bound to soybean and cucumber cell wall fractions, respectively; 70% or more of Be, Y, and Fe was fixed in the chloroplast fraction; and approx. 10% of Sc, Fe, V, and As were fixed in the mitochondrial fraction. Translocation of nuclides within the soybean plant at different stages of growth has been determined. Vanadium, Y, Be, Se, Nb, Sc, Cr, and Zr were predominantly accumulated in the root. Although the total percentage of plant uptake of Sc, Zr, Nb, and Cr was high, because of low mobility and translocation to shoot, their accumulation in the fruit fraction was negligible. The translocation of mobile nuclides in plants was demonstrated clearly by Rb, Zn, and Fe. Data on the nuclide fraction mobilized from vegetative parts into edible parts was used to assess the percentage of accumulated radionuclides in plants that may reach humans through beans.
    Environmental Toxicology and Chemistry 09/1999; 18(9):2023 - 2027. DOI:10.1002/etc.5620180921 · 3.23 Impact Factor
  • [Show abstract] [Hide abstract]
    ABSTRACT: Characterizable amount of LaatC80 was prepared by means of a two-stage HPLC purification of fullerene ingredients which were extracted from carbon soot in macroscopic quantity. In the same way as the investigation of CeatC82 and CeLaatC80 in our previous work, molecular dynamic behavior of the newly purified species has been studied by means of time-differential perturbed angular correlation measurements. The data analyzed have shown that powder CeatC80 has somewhat slow rotational motion at room temperature compared with CeatC82 of the same form and the electric field gradient at the encaged Ce nucleus is almost equal to that at the corresponding atom of CeatC82.
    09/1999; DOI:10.1063/1.59767
  • N Sotogaku · K Endo · R Hirunuma · S Enomoto · S Ambe · F Ambe ·
    [Show abstract] [Hide abstract]
    ABSTRACT: The binding affinity of various trace elements to blood components and the pH-dependence of the binding affinity of the elements to serum proteins were examined using the radioactive multitracer technique. The binding affinity of 13 elements (Be, V, Mn, Zn, Se, Rb, Sr, Ce, Eu, Gd, Tm, Yb, and Lu) was simultaneously determined by gamma-ray spectrometry. The blood drawn from rats was separated into plasma, corpuscles, and erythrocyte ghosts. It was found that Be, Sr, Mn, and Zn bind highly to the plasma proteins. V and Se were highly bound to the corpuscles, and Se to the erythrocyte ghosts as well. Similar binding percentages of rare earth elements (Ce, Eu, Gd, Tm, Yb, and Lu) were found for each of the blood components, with the highest percentages being observed for plasma proteins. Albumin, beta-globulin, gamma-globulin, apotransferrin, and holotransferrin were examined in the study on the affinity of individual serum proteins. The pH dependence of the affinity of metal ions to the serum proteins in the pH range of 6.4-8.5 was examined using ultrafiltration and gamma-ray spectrometry. Each element showed a characteristic binding affinity to each serum protein, depending on pH. The results are discussed in terms of the chelating ability of metal ions and the nature of the serum proteins.
    Journal of Trace Elements in Medicine and Biology 08/1999; 13(1-2):1-6. DOI:10.1016/S0946-672X(99)80016-9 · 2.37 Impact Factor
  • Source
    [Show abstract] [Hide abstract]
    ABSTRACT: The uptake and distribution of radioisotopes of beryllium, calcium, scandium, vanadium, chromium, manganese, iron, cobalt, nickel, zinc, gallium, arsenic, strontium and barium in vitamin D (VD)-overloaded rats were investigated and compared with those in control rats, using the multitracer technique. Each element revealed its characteristic distribution among various organs in control and VD-overloaded rats. For some elements, such as cobalt and chromium, the distribution patterns in them were significantly different. These results are discussed in terms of the metabolism of the elements in rats.
    Applied Radiation and Isotopes 06/1999; 50(5):843-9. DOI:10.1016/S0969-8043(98)00142-0 · 1.23 Impact Factor
  • S. Oishi · R. Amano · A. Ando · S. Enomoto · F. Ambe ·
    [Show abstract] [Hide abstract]
    ABSTRACT: The radioactive multitracer technique was applied to a study on the uptake of trace elements in normal C57BL/6N mice. Comparative uptake behavior of46Sc,54Mn,59Fe,58Co,65Se,83Rb and88Zr tracers was examined among 11 organs (brain, cardiac muscle, lung, liver, spleen, pancreas, kidneys, bone, muscle, eyeballs and testes) and blood, and evaluated in terms of the “tissue uptake rate (the radioactivity percentage of injected dose per gram of tissue, %dose/g)”. The multitracer technique revealed reliable data demonstrating characteristic uptake of the 8 trace elements, Sc, Mn, Fe, Co, Zn, Se, Rb and Zr by the brain and other organs, as well as the distinctive features of the accumulation and retention of each element in the brain.
    Journal of Radioanalytical and Nuclear Chemistry 02/1999; 239(2):411-416. DOI:10.1007/BF02349522 · 1.03 Impact Factor

Publication Stats

2k Citations
315.04 Total Impact Points


  • 1987-2010
    • RIKEN
      Вако, Saitama, Japan
  • 2000
    • Osaka University
      • Department of Electronics and Materials Physics
      Ōsaka-shi, Osaka-fu, Japan
  • 1995
    • Kanazawa University
      Kanazawa, Ishikawa, Japan
  • 1991
    • Toyota Physical and Chemical Institute
      Seto, Aichi, Japan
  • 1965
    • The University of Tokyo
      白山, Tōkyō, Japan