Shikoku Research Institute

Takamatsu, Japan

Shikoku Research Institute

Takamatsu, Japan
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Patent
Mitsui Chemicals Agro Inc., Shikoku Research Institute and Kagawa University | Date: 2011-06-08

Disclosed are: a plant disease control agent; and a plant disease control method. Specifically disclosed are: a plant disease control agent comprising D-tagatose as an active ingredient; and a plant disease control agent comprising at least one member selected from the group consisting of saccharides and substances each having a bactericidal and/or fungicidal activity. The plant disease control agents are effective for the control of cucumber, grape and cabbage downy mildew, damping-off in seedlings caused by Pythium spp, cucumber and barley powdery mildew, wheat stem rust, potato and tomato late blight, and others.


Seike T.,Kyushu University | Fujita K.,Kyushu University | Yamakawa Y.,Kyushu University | Kido M.A.,Kyushu University | And 4 more authors.
Clinical and Experimental Metastasis | Year: 2011

The incidence of brain metastasis is increasing, however, little is known about molecular mechanism responsible for lung cancer-derived brain metastasis and their development in the brain. In the present study, brain pathology was examined in an experimental model system of brain metastasis as well as in human brain with lung cancer metastasis. In an experimental model, after 3-6 weeks of intracardiac inoculation of human lung cancer-derived (HARA-B) cells in nude mice, wide range of brain metastases were observed. The brain sections showed significant increase in glial fibrillary acidic protein (GFAP)-positive astrocytes around metastatic lesions. To elucidate the role of astrocytes in lung cancer proliferation, the interaction between primary cultured mouse astrocytes and HARA-B cells was analyzed in vitro. Co-cultures and insert-cultures demonstrated that astrocytes were activated by tumor cell-oriented factors; macrophage migration inhibitory factor (MIF), interleukin-8 (IL-8) and plasminogen activator inhibitor-1 (PAI-1). Activated astrocytes produced interleukin-6 (IL-6), tumor necrosis factor-α (TNF-α) and interleukin-1 β (IL-1β), which in turn promoted tumor cell proliferation. Semi-quantitative immunocytochemistry showed that increased expression of receptors for IL-6 and its subunits gp130 on HARA-B cells. Receptors for TNF-α and IL-1β were also detected on HARA-B cells but down-regulated after co-culture with astrocytes. Insert-culture with astrocytes also stimulated the proliferation of other lung cancer-derived cell lines (PC-9, QG56, and EBC-1). These results suggest that tumor cells and astrocytes stimulate each other and these mutual relationships may be important to understand how lung cancer cells metastasize and develop in the brain. © The Author(s) 2010.


Hiraga Y.,Shikoku Research Institute | Shigemoto N.,Shikoku Research Institute
Journal of Chemical Engineering of Japan | Year: 2012

The present study investigates the removal of As and Se oxoanions from solution by calcination products of Ca(OH) 2- Al(OH) 3 and CaCO 3-Al(OH) 3 mixtures with various Ca/(Ca+Al) molar ratios at 1273 K. In the calcination products obtained from the mixtures with Ca/(Ca+Al)=0.833, lime (CaO) and Ca-Al oxides were detected as the predominant and minor crystalline compounds, respectively. The calcination products were then immersed in solutions contained As and Se oxoanions to examine their removal e+ciency at rather high pH (>11). The highest arsenite removal e+ciencies were observed when the calcination product with Ca/(Ca+Al) molar ratio >0.7 was employed, while the arsenate removal ef- =ciency was independent of the Ca/(Ca+Al) ratio. The selenate removal e+ciency attained the peak value when the Ca/ (Ca+Al) ratio was 0.7-0.8. The maximum removal amount per unit weight of the calcination products for arsenite, arsenate, selenite, and selenate were 6-9, 4, 6-8 and 1.4-1.9 mmol/g, respectively, which were considerably higher than previously reported values. Upon reaction with the calcination product, arsenite, arsenate and selenite formed hard-soluble Ca salts, Ca(HAsO 3), Ca 3(AsO 4) 2 with Ca5(AsO4)3(OH) and CaSeO3, respectively, where the quick lime (CaO) in the calcination product is an active component for removing these oxoanions. On the other hand, selenate was removed by forming ettringite substituted by selenate, Ca 6Al 2(SeO 4) 3(OH) 12·26H 2O, where the synergistic effect of Ca and Al compounds in the calcination product should be exhibited. © 2012 The Society of Chemical Engineers, Japan.


Hiraga Y.,Shikoku Research Institute | Shigemoto N.,Shikoku Research Institute
Journal of Chemical Engineering of Japan | Year: 2012

Ca(OH) 2-Al(OH) 3 and CaCO 3-Al(OH) 3 mixtures with Ca/(Ca+Al) ratios in the range 0 to 1 were calcined in the temperature range 873-1673 K for studying the efiect of the calcination temperature and Ca/(Ca+Al) ratio on the calcinations products. XRD analysis showed that the mixtures with Ca/(Ca+Al) ratios in the range 0.68-0.83 and calcined around 1273 K gave lime (CaO) as the major product and mayenite (Ca 12Al 14O 33), Ca 9A l6O 18, and Ca 5A l6O 14 as the minor products. These calcination products indicated that the eficiencies of the removal of chromate and borate from the solution were high. Upon immersing these calcination products in chromate and borate solutions, Ca 4A l2CrO 10·12H 2O and Ca 4A l2(HBO 3) 0.5(OH) 13·6H 2O were formed, respectively; the Ca/(Ca+Al) molar ratio in these compounds was 0.68, which was close to that in the raw mixtures. A Ca/(CafiAl) ratio in the range 0.68-0.83 resulted in the optimum removal of chromate and borate from the solution. The Ca/(Ca+Al) ratio was more efiective than these crystalline components in these calcination products. Further, Ca(B(OH) 4) 2·2H 2O precipitated as a result of borate removal. © 2012 The Society of Chemical Engineers, Japan.


Hiraga Y.,Shikoku Research Institute | Shigemoto N.,Shikoku Research Institute
Journal of Chemical Engineering of Japan | Year: 2010

Exchange between the SO4 2- ions in ettringite and borate is believed to occur during borate removal from wastewater by the Ca(OH)2-Al2(SO4)3 addition method. To investigate borate uptake by ettringite, we synthesized ettringite in the presence of H3BO3 and prepared suspensions of ettringite in H3BO3 solution. At the theoretical Ca(OH)2/Al2(SO4)3 ratio for ettringite, with an increase in the H3BO3/Al2(SO4)3 ratio, the ettringite concentration decreased but the concentration of amorphous compounds increased; further, the amount of borate uptake by the precipitate formed also increased. Upon alkalization of the H3BO3-Al2(SO4)3 solution to pH = 10 with NaOH solution, borate-containing amorphous Al(OH)3 was precipitated. It was proposed that the borate copre-cipitated along with amorphous Al(OH)3 (which showed boron uptake) and did not undergo exchange with SO4 2- ions in ettringite; this was strongly supported by the results of IR and TG analyses performed on the boron-containing precipitates. At a high H3BO3/Al2(SO4)3 ratio, ettringite decomposed to afford amorphous Al(OH)3, and borate coprecipitation was promoted. Upon suspension in H3BO3 solution, the ettringite precipitate showed low boron uptake, which was presumably due to the substitution of SO4 2- in ettringite with B(OH)4-. © 2010 The Society of Chemical Engineers, Japan.


Kawatake K.,Shikoku Research Institute | Shigemoto N.,Shikoku Research Institute
Journal of Nuclear Science and Technology | Year: 2012

Synthesis of potassium iron(III) hexacyanoferrate(II) (K/Fe-Fe(CN) 6) in the pores of activated carbon (AC) was attempted by impregnating AC with K 4[Fe(CN) 6] and FeCl 3, and the Cs uptake performance of the resulting adsorbent was examined. K/Fe-Fe(CN) 6 supported on AC was prepared by varying the reaction conditions such as the supplied amounts and molar ratios of the reagents, and the Cs uptake performance was optimized. The impregnated product was characterized by XRD, EPMA, and porosimetry to elucidate the condition to which Fe 4[Fe(CN) 6] 3 was filled in the AC pores. The K/Fe- Fe(CN) 6-on-AC was immersed in seawater containing 0.075 mmol · dm -3 Cs and agitated for 1 day to obtain the Cs uptake. The Cs uptake was large at pH ≤ 10 but decreased abruptly at pH > 10.5. The maximum Cs uptake was 10.4 μmol · g -1 at the equilibrium Cs concentration of 49 μmol · dm -3 and the distribution coefficient was 45.5 dm 3 · g -1 at the equilibrium concentration of 0.015 μmol · dm -3, respectively. When K/Fe-Fe(CN) 6-on-AC was immersed in Cs-containing seawater, K + ions in the adsorbent were completely exchanged for Na + ions in seawater, and the added Cs + ions were then substituted for the Na + ions in the adsorbent. © 2012 Atomic Energy Society of Japan. All rights reserved.


Hiraga Y.,Shikoku Research Institute | Shigemoto N.,Shikoku Research Institute
Journal of Chemical Engineering of Japan | Year: 2013

CaCO3-Al(OH)3 mixtures with different mixing ratios were calcined at different temperatures in the range of 1073-1473 K. To solidify the coal fly ash, it was mixed with the calcination product and water, and allowed to stand under saturated steam at 348 K for 3 d. The compressive strength of the solidified product using the calcination product was measured and compared with those of alumina and Portland cements. The calcination conditions and solidification conditions were examined to optimize the compressive strength of the solidified products. The calcination product reacted with fly ash to form crystalline Ca3Al2(SiO4)(OH)8, thus contributing to the high compressive strength of the solidified product. The leaching behavior of fly ash artificially contaminated with CrO2- 4, B(OH)- 4, AsO3- 4, and SeO2- 4, and solidified with the calcination product was examined. The solidified product formed from the calcination product prevented the leaching of all four oxoanions more effectively than the solidified products formed from other cements. The higher compressive strength of the solidified product facilitated this lower oxoanion leaching concentration from the solid. © 2013 The Society of Chemical Engineers, Japan.


Shiozaki K.,Shikoku Research Institute | Shigemoto N.,Shikoku Research Institute
Journal of Chemical Engineering of Japan | Year: 2013

Potassium iron(III) hexacyanoferrate(II) (K/Fe-Fe(CN)6) supported on wood chips (WC) was prepared and its Cs uptake in seawater was measured under batch agitation. The Cs-uptake behavior of this adsorbent was compared with that of K/ Fe-Fe(CN)6 supported on activated carbon (AC), which had already been published. Applying the Elovich equation, both the WC and AC adsorbents showed a similar time-dependence for Cs adsorption reaction, suggesting the same size of K/Fe-Fe(CN)6 particles for Cs dffusion. From the Cs-adsorption isotherm (298 K), the maximum Cs uptake per unit mole of Fe(CN)6 supported on WC (0.423 mol/mol-Fe(CN)6 -1) was 7-fold larger than that on AC (0.060 mol/mol-Fe(CN)6 -1): this difference in the Cs uptake should be ascribed to that K/Fe-Fe(CN)6 particles being partially filled into rather large macropores of WC, whereas narrow macropores in AC were blocked by the K/Fe-Fe(CN)6. The Cs-distribution coefficient, Kd for K/Fe-Fe(CN)6-on-WC is larger than that for K/Fe-Fe(CN)6-on-AC when the equilibrium Cs concentration in solution is high. © 2013 The Society of Chemical Engineers, Japan.


Patent
Shikoku Research Institute | Date: 2012-10-17

A hydrogen flame monitoring method and system capable of ensuring safety of a gas utilization facility by visualizing invisible-to- naked-eye hydrogen flame of leakage gas into the form of an image. The hydrogen flame monitoring method comprises the steps of collecting an ultraviolet light of a particular wavelength, which is caused by hydrogen flame, in a space to be monitored, converting the collected ultraviolet light into an electronic image, amplifying and then converting the electronic image into an optical image, and imaging the spatial intensity distribution of the ultraviolet light at the particular wavelength light. The hydrogen flame monitoring system comprises ultraviolet image pickup means for collecting a detected light of a particular wavelength, which is caused by hydrogen flame, in a space to be monitored, image pickup means for converting the collected ultraviolet light into an electronic image, and amplifying and then converting the electronic image into an optical image, a visual image pickup device for capturing visible image, and an image pickup means for superimposing the visible image and the imaged spatial intensity distribution of the collected ultraviolet light with each other.


Patent
Shikoku Research Institute | Date: 2010-04-28

A loose part monitoring method and system for preventing the generation of a false alarm as much as possible, including analyzing a group of detection signals that have been output from a plurality of sensors placed on a wall defining a fluid flow path, wherein the group of detection signals are analyzed for a rising gradient that is related to change in intensity of impulsive sound, a damping time that is related to change of intensity of the impulsive sound, and a frequency spectrum that is related to pitch of the impulsive sound in order to determine whether the group of detection signals are false or true.

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