Dr. KATSURA Hidemitsu's Official Website

TABLE OF CONTENTS
PRINCIPLE PUBLICATION
MAJOR ACCOMPLISHMENTS
EDUCATION in JAPAN
OTHER TRAINING
EMPLOYMENT RECORDOTHER
LANGUAGE
ACTIVITIES & MEMBERSHIP OF PROFESSIONAL
OTHER MEMBERSHIP
HOBBIES AND INTERESTS
CONTACT INFO

PRINCIPLE PUBLICATION

[B-1]
KATSURA Hidemitsu
"Accounts of variations of stable isotope ratios on the earth"
ISBN 978-3-659-33738-3
LAMBERT ACADEMIC PUBLISHING (Saarbrucken,Germany) 2013
EUR49.00
https://www.lap-publishing.com/catalog/details//store/gb/book/978-3-659-33738-3/accounts-of-variations-of-stable-isotope-ratios-on-the-earth?locale=gb
ABSTRACT: To date, there have been a considerable number of reports and investigations regarding accounts of stable isotopic fractionations and variation of stable isotope ratios. These de-scriptions depend only on biological activities, a little bit of differences of kinetic ratios of chemical reactions and a little differences of physical development. Although the rela-tionship between the phenomena of stable isotopic fractionations or variation of stable isotope ratios and electric charge or electric field or electromagnetic forces has never been considered. Furthermore the relationship between the phenomena of variation of stable isotope ratios and cosmic-ray bombardment (spallation effect) also has never been con-sidered. The object of this investigation is to discover the reason for variations in isotopic ratios in the environment to adapt the previous studies as follows.
[A] Neutron bom-bardment from cosmic radiation (spallation effect)
[B] Oddo-Harkins Rule
[C] All kinds of isotopes have specific electrical potential
[D] Previous study of Production of 7Be by nuclear spallation reactions

TOP E

MAJOR ACCOMPLISHMENTS

[R-1]
KATSURA Hidemitsu :
"Accumulation of a specific nuclide by Female Common skete (Feminam Okamejei kenojei spp.)".
Asian Journal of Chemistry,
(ISSN 0970-7077 (Print)), (ISSN 0975-427X (Online)), (CODEN: AJCHEW),
Vol.25,No.13 (2013), Pages:7613-7616,
http://www.asianjournalofchemistry.co.in/user/journal/viewarticle.aspx?ArticleID=25_14_12
PdfFile
ABSTRACT: Tokyo Electric Power Fukushima Dai-Ichi Nuclear Power Station in Fukushima-Ken, Japan was destroyed due to a magnitude 9 earthquakes in the ocean north east of the Island of Honshu in Japan that produced a historical Tsunami on 11 March 2011. Due to a nuclear meltdown, hydrogen explosions damaged buildings housing reactors, cooling water from the reactor core was contaminated, and huge amounts of radioisotopes were released into the atmosphere and marine waters. Currently, offshore fishing in FUKUSHIMA-KEN, Japan is prohibited because the majority of fish still contain excessive amounts of radioisotopes. Tokyo University of Marine Science and Technology measured the amounts of radioisotopes found in fishes offshore of IWAKI-SHI, located south of the destroyed Nuclear Power Station in FUKUSHIMA-KEN, Japan. Some of these data indicated that feminam Okamejei kenojei (English Name: Female Common skete; Japanese Name: KOMON KASUBE) had a negative linear relationship between fish weight and 137Cs/134Cs ratio (137Cs: caesium 137, 134Cs: caesium 134). Therefore, feminam Okamejei kenojei have the ability to accumulate a specific nuclide (radioisotope). To date, ultracentrifugation and diffusion methods have been used to accumulate specific nuclides for atomic fuel. However, if we could utilise the ability of Okamejei kenojei to accumulate a specific nuclide, we would have an additional method to obtain specific nuclides.

Okamejei kenojei

[R-2]
KATSURA Hidemitsu :
"The Total Quantity of Caesium Radioisotopes in Fish in the Fukushima-Ken Exclusive Economic Zone, Japan, in November 2012".
Scientific Research and Essays (SRE)
(ISSN 1992-2248),
Academic Journals
Inc., Vol.8, No.26, (2013), [11-JUL-2013], Pages:1252-1257, DOI: 10.5897/SRE2013.5581
PDF File
http://academicjournals.org/journal/SRE/article-abstract/D1C647328421
ABSTRACT: The Tokyo Electric Power Company Fukushima Dai-ichi nuclear power plant in Fukushima-Ken (Prefecture), Japan, was destroyed in March 2011 due to a massive earthquake (magnitude 9) centred offshore to the northeast of Honshu Island and the subsequent historic tsunami on 11 March 2011. Due to nuclear meltdown, damage to the buildings housing the reactors by hydrogen explosions, and the contamination of cooling water from the reactor cores, huge quantities of radioisotopes were emitted to the atmosphere and to the adjacent seawater. Fishing is currently prohibited off the coast of Fukushima-Ken because intermittent surveys have found that the majority of fishery products still contain radioisotope levels exceeding the Japanese Standard Value. However, the total amount of caesium radioisotopes in fish biomass in the Fukushima-Ken Exclusive Economic Zone (EEZ) has not yet been reported. The Tokyo University of Marine Science and Technology has measured radioisotope levels in fishery species off Iwaki-Shi (City), Fukushima-Ken (located south of the destroyed nuclear power plant), and these data can be used to estimate the total fish biomass and the quantity of caesium radioisotopes in fish in the Fukushima-Ken EEZ.　On 22?23 November 2012, the estimated total fish biomass in the Fukushima-Ken EEZ was 91,150,218.79 kg and the estimated total quantities of Cs-134 and Cs-137 in fish were 4,879,259,657 Bq and 8,381,002,727 Bq, respectively.

[R-3]
KATSURA Hidemitsu :
"The effect of latitude on carbon, nitrogen and oxygen stable isotope ratios in foliage and in nitric- oxide ions of aerosols".
International Journal of Environmental Research,
(ISSN 1735-6865),
Vol.6, No.4, (Autumn), (2012), Pages: 825-836 .
PDF File
http://www.ijer.ir/?_action=articleInfo&article=553
http://ijer.ut.ac.ir/pdf_553_d685583582b8390e7beba5ae0eedae3a.html
ABSTRACT: Cosmic rays in the upper troposphere (9000 meters to 15000 meters) initiate the following nuclear chemical reaction:
¹n + ¹⁴N => ¹⁴C + ¹H
Previous research has shown a strong effect of latitude on the abundance of neutrons from cosmic rays. However, to date, there has been little exploration of the relationship between the latitude effect for cosmic-ray neutrons and latitudinal variations of stable isotope ratios in aerosols and foliage. In this study, aerosol samples (PM 4.5) and foliage samples were collected in Singapore in November 2009, February and July 2010 and in Fairbanks, Alaska, U.S.A. in January, April and September 2010. The average value of delta 15/14N in foliage in Fairbanks was -1.84 [per mil], whereas the average value in Singapore was -1.3 [per mil]. These results show a clear latitude effect on delta 15/14N in foliage. Furthermore, the average value of delta 15/14N in the nitric-oxide substances in the aerosol samples in Fairbanks was -2.70 [per mil], whereas the average value in Singapore was +7.61 [per mil], demonstrating that delta 15/14N in nitric-oxide substances from aerosol samples also experiences a latitude effect. In both Singapore and Fairbanks, it was observed that values of delta 15/14N in nitric-oxide substances from aerosols were correlated with declination. The value of delta 15/14N in nitric-oxide substances from aerosols in Fairbanks increased with increasing declination due to more active conversions from 14N to 14C by neutron bombardment.

Dr. BALASUBRAMANIAN Rajasekhar and Dr. KATSURA Hidemitsu

[R-4]
KATSURA Hidemitsu :
"The effect of electrically charged clouds on the stable nitrogen isotope ratio and the anion concentrations in cloud-based aerosols".
International Journal of Environmental Research,
(ISSN 1735-6865),
Vol.6, No.2 (2012), Pages:457-466,
http://www.ijer.ir/?_action=articleInfo&article=514
http://www.ijer.ir/pdf_514_5e41ff0e7c446b015a115f9c59599ac3.html
PDF File
ABSTRACT: It is very important to determine the stable nitrogen isotope ratio for the nitrogenous substances in aerosols and the geochemistry behavior of stable nitrate ion isotopes in aerosols in order to elucidate the chemical and physical functions of clouds. Hence, aerosol field sampling was conducted in the skies offshore from Malibu Beach and Santa Barbara, California, U.S.A. on 16 and 18 July 2009, using an airplane. The samples were analyzed for nitrate and nitrite ions using ion chromatography (IC) and GC-mass spectrometry (GC-MS). The results indicate a higher stable isotopic ratio of δ (delta) 15N/14N in the aerosols collected at the cloud top of one cloud than the aerosols collected from the cloud base of a second cloud at the same altitude (30.48 meters) on 18 July 2009. NO2- nitrite ions were present only in the aerosols sampled at the cloud base. At the same altitude, the stable nitrogen isotope ratio in the nitrogenous substances found in the aerosol depended on the aerosol position within the clouds. Furthermore, the altitude effect was small for the isotope ratio. To date, no research has been published that explores the relationship between the electric charge of clouds or the atmosphere and the fate or transformation of aerosols. My investigation indicated that past models describing the fate or transformation of aerosols within clouds are not based on the actual details of the situation. This study showed that the fates of electrically charged aerosols or ionized aerosols were affected by the electrically charged cloud.

[R-5]
KATSURA Hidemitsu :
"Latitude Effect on Carbon, Nitrogen and Oxygen Stable Isotope Ratios in Foliage and in Nitric-oxide Ions of Aerosols".
Asian Journal of Chemistry (ISSN 0970-7077 (Print)), (ISSN 0975-427X (Online)),
(CODEN: AJCHEW),
Vol.24,No.12 (2012), Pages:5453-5456,
http://www.asianjournalofchemistry.co.in/user/journal/viewarticle.aspx?ArticleID=24_12_8
http://www.asianjournalofchemistry.co.in/User/ViewFreeArticle.aspx?ArticleID=24_12_8
PDF File
ABSTRACT: In this study, aerosol samples (PM 4.5) and foliage samples were collected in Singapore and in Fairbanks, Alaska in 2009 and 2010. Ion chromatography, gas chromatography-mass spectrometry and element mass spectrometry were used to measure anion concentrations and nitrogen and oxygen stable isotope ratios in nitrogen oxide ions of the aerosol samples, as well as to measure carbon and nitrogen stable isotope ratios in the foliage samples. In both Singapore and Fairbanks, it was observed that values of delta 15N/14N in nitric-oxide substances from aerosols were correlated with declination. The value of delta 15N/14N in nitric-oxide substances from aerosols in Fairbanks increased with increasing declination due to more active conversions from 14N to 14C by neutron bombardment. This study implies that at least one of the reason of increasing concentration of carbon dioxide in the atmosphere past 2 centuries may be affecting by cosmic-ray bombardment to nitrogen in the atmosphere.

[R-6]
KATSURA Hidemitsu :
"Variations in stable isotope ratios and anion concentrations of in-flight water".
Asian Journal of Chemistry,
(ISSN 0970-7077 (Print)), (ISSN 0975-427X (Online)), (CODEN: AJCHEW),
Vol.25, No.1 (2013),Pages:410-418,
http://www.asianjournalofchemistry.co.in/user/journal/viewarticle.aspx?ArticleID=25_1_81
http://www.asianjournalofchemistry.co.in/User/ViewFreeArticle.aspx?ArticleID=25_1_81
PDF File
ABSTRACT: Sampling of the water used for hand washing in aeroplane lavatories (in-flight water) was conducted on passenger flights between Narita International Airport in the suburbs of Tokyo, Japan and Changi International Airport in Singapore from August 22, 2009 to July 29, 2010. These samples were analyzed for anion concentrations using ion chromatography (IC) and for stable nitrogen isotope ratios in the nitrate ion ( NO₃^-) using GC-mass spectrometry (GC-MS). The results of these analyses indicate that in-flight water exhibits variations in stable isotope ratios and anion concentrations during flights. A very low isotopic ratio of delta 15N/14N = -368.5 [per mil] was measured for the in-flight water on an aircraft flying over thunder clouds on November 15, 2009, at 10 degree North offshore of Luzon Island in the Philippines. If the extremely low stable nitrogen Isotope ratio at -368.5 [per mil] measured on November 15, 2009, at 10 degree North is excluded, a rough trend consisting of the highest stable nitrogen isotope ratios at nearly the same altitude was observed at neighboringpositions of declination. The concentration of the NO₃^- ion was highly variable in the sampled in-flight water during flight. The following nuclear chemical reaction is well known.
¹n + ¹⁴N => ¹⁴C + ¹H
If this nuclear chemical reaction occurred, the nitrate ion (NO₃^-) was converted to carbonate ion (CO₃^2- ). Hence, the carbon in the product CO₃^2- would be carbon-14, a radioisotope. The passengers and crew members on flights may use in-flight water for hand washing, gargling with mouth wash and as drinking water. Internal exposure to radiation in the form of carbon-14 for these individuals is more likely.

Dr. FUNADA Ryo, Dean (LEFT);, DR. KATSURA Hidemitsu (CENTER); Dr. TAKAYANAGI Masao, Deputy Dean (RIGHT)

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OTHER TRAINING

（国立シンガポール大学教授、Dr. BALASUBRAMANIAN Rajasekhar （左）と桂秀光（右）。国立シンガポール大学工学部にて）

（国立シンガポール大学教授、Dr. BALASUBRAMANIAN Rajasekhar　（左）と桂秀光（右）。国立シンガポール大学工学部にて）