All issues
Volume 2006 (2006)
- Issue 225 Pages 329-
- Issue 224 Pages 261-
- Issue 223 Pages 165-
- Issue 222 Pages 107-
- Issue 221 Pages 2-
Volume 2006, Issue 224
Displaying 1-8 of 8 articles from this issue
- |<
- <
- 1
- >
- >|
-
Shuji Yoshizawa, Satoko Tanaka, Michio Ohata, Shigeru Mineki, Sumio Go ...2006 Volume 2006 Issue 224 Pages 261-265
Published: September 01, 2006
Released on J-STAGE: June 28, 2010
JOURNAL FREE ACCESSWe prepared charcoals from bamboo, scrap wooden formwork and corn-cobs. Each of these charcoal powders was mixed with rice bran as a nutrient in a weight ratio of 1: 1.15.(Rice bran had previously been used as a model biomass waste for composting.) The moisture content of the mixture was adjusted to 65 %. Aerobic complex microorganisms were added to the biomass waste mixture to seed the composting. Samples were maintained in ambient air (RH 53 %, 23°C) and stirred vigorously with a spatula once a day for aeration. Scanning electron microscopy revealed microorganisms on the surface of the charcoal and in the mouths of the charcoal pores.Measurement of adenosine triphosphate concentrations of the samples revealed that the microorganisms had proliferated in the systems containing charcoal.
It was suggested that this proliferation was attributed to supplying abundant oxygen for microorganisms because the charcoal has a lot of pores. Another reason why the charcoal facilitated microorganisms proliferation might be that the microorganisms on the surface of the charcoal were able to be supported in the pores of a sub-micron scale in the charcoal as a matrix might be.View full abstractDownload PDF (1022K) -
Motoi Machida, Mariko Hayashida, Yuichi Kato, Hideki Tatsumoto2006 Volume 2006 Issue 224 Pages 266-271
Published: September 01, 2006
Released on J-STAGE: June 28, 2010
JOURNAL FREE ACCESSAdsorption of various aromatics onto activated carbons oxidized by nitric acid in aqueous solution was examined comparing with non-oxidized counterparts. The aromatics used were aniline, benzoic acid, nitrobenzene, phenol and bisphenol A. All aromatics exhibited two-step adsorption isotherms for oxidized activated carbons with the rise in concentration of adsorbates, whereas only one-step adsorption isotherms were observed for non-oxidized carbons. The amount of aromatics adsorption was also decreased by oxidation except bisphenol A. The aromatics adsorption sites on the oxidized activated carbon were consid-ered to be different from those on the non-oxidized carbon. Adsorption mechanism was investigated by a brief numerical analysis for the experimental data of two-step adsorption isotherms principally assuming a two-layer adsorption model and a mono-layer reorientation model. Based on the analysis for the two-step isotherms observed on the oxidized activated carbon, a reorientation model switching from flat-on to end-on molecular position is probable as well as a two-layer model.View full abstractDownload PDF (1019K) -
Hiroyuki Wakisaka, Hajime Miyake, Yutaka Kawahara2006 Volume 2006 Issue 224 Pages 272-275
Published: September 01, 2006
Released on J-STAGE: June 28, 2010
JOURNAL FREE ACCESSMicroporous carbons were produced by carbonizing and activating bamboo (phyllostachys heterocycla). Carbon dioxide was used as an activating agent. Also the activated carbons were produced using bamboo carbons with less potassium fractions. The potassium fractions are mainly distributing in the middle lamella that connects the adjacent cell walls of bamboo. The micropore distribution became sharper for the carbon produced using bamboo carbon with smaller potassium fractions and controlling the yield of activated carbon no less than 70%. It seems that potassium fractions in the middle lamella will accelerate the activation reaction, and then the micropore distribution tends to be broader when the activation reaction reaches the middle lamella.View full abstractDownload PDF (731K) -
Hideo Matsui, Hirokazu Miyazaki, Keigo Otsuki, Emi Kunimitsu, Yasuhiro ...2006 Volume 2006 Issue 224 Pages 276-280
Published: September 01, 2006
Released on J-STAGE: June 28, 2010
JOURNAL FREE ACCESSA networked neodymium-O-phenylene-O-ytterbium ternary hybrid copolymer was calcined under vacuum at 400, 500, 600, and 700°C obtain black-colored materials composed of carbon clusters and nano-sized Yb2O3 and Nd compound particles. ESR spectral examinations showed that the calcined materials have a free electron on carbon clusters via electron transfer between carbon clusters and metal compounds. From the changes of ESR signal intensity of the calcined materials under magnetic field impression, spin relaxation in the neodymium atom is presumed to be controlled by a spin interaction with the ytterbium atom.View full abstractDownload PDF (567K) -
Agnès Oberlin, Sylvie Bonnamy, Kyoichi Oshida2006 Volume 2006 Issue 224 Pages 281-298
Published: September 01, 2006
Released on J-STAGE: June 28, 2010
JOURNAL FREE ACCESSThe paper is divided in two parts. The first one recalls the necessary basis of ordered and disordered materials crystal-lography applied to carbons. The second part deals with the transformation of macromolecules (natural or industrial) to carbon and the eventual graphitization of the end-products. It is shown that the final ordering is entirely under the depend-ence of the elemental composition of the precursor through liquid crystals (Local Molecular Orientations: LMO' s) demixtion. The numerical parameter used is FLMO (atomic ratio of cross-linking atoms over hydrogen at the occurrence of liquid crystals precipitation). The end-products range progressively from non-graphitizing to graphitizing carbons as FLMO decreases from 0.3-0.5 to zero.View full abstractDownload PDF (9346K) -
characteristicsandsynthesis/productionmethodsMineyuki Arikawa2006 Volume 2006 Issue 224 Pages 299-307
Published: September 01, 2006
Released on J-STAGE: June 28, 2010
JOURNAL FREE ACCESSDownload PDF (1530K) -
Michio Inagaki, Takahiro Morishita, Masahiro Toyoda, Tomoki Tsumura, H ...2006 Volume 2006 Issue 224 Pages 308-317
Published: September 01, 2006
Released on J-STAGE: June 28, 2010
JOURNAL FREE ACCESSDownload PDF (1997K) -
[in Japanese]2006 Volume 2006 Issue 224 Pages 325
Published: September 01, 2006
Released on J-STAGE: June 28, 2010
JOURNAL FREE ACCESSDownload PDF (149K)
- |<
- <
- 1
- >
- >|