List of Dissertation Abstract (Risk Management and Environmental Sciences)

NameSupervisor

Title

Abstract
In the ecological risk assessment of chemicals, the application of probabilistic methods to theYohei ONISHI

Yoshihito
TAKEDA

Study on the method ofuncertainty arising when using the extrapolated value of the toxicity and the predicted value by theprobabilistic ecological risk

QSAR model was studied. Furthermore, in the risk assessment of combined toxicity, theassessment

applicability of simulation analysis and stochastic method on the uncertainty arising when
extrapolated toxicity is used was studied.
Paddy field is a major source of methane (CH4) emission. Feeding activities of aquatic earthworms

Methane Mitigation from Paddy
Priyanka MITRA

Nobuhiro

Field Ecosystem: Role ofKANEKO

Aquatic Earthworms andFarming Practices

in paddy soil add oxygen in lower soil layers and farming practice may influence densities ofaquatic earthworms in paddy soil. Therefore, this study was conducted to reduce CH4 emission by
integrated farming practices and aquatic earthworms and it was hypothesized that aquaticearthworms may accelerate oxidation of CH4 in paddy field. Several field and incubation studies
were done to test the hypothesis and it was confirmed that aquatic earthworms can reduce CH4emission from paddy field through enhancing methanotrophs.
In this research, we analyzed the risk information on chemical substances related to detergents inAnalysis of Chemical Risk
Yuko MUTOH

Masaru OYA

Information related to Detergent
and Cosmetics in China

China with reference to research on risk information in Japan.，and the result showed that the riskof surfactant tends to be emphasized in Japanese books and the risk of mercury tended to beemphasized in Chinese books. The scale was then proposed as a method to contribute to social
improvement that improves the information environment of consumers by objectively evaluating
how consumers can understand risk - related expressions.
Funguses are easy to multiply under the high humidity and nutritious environment on the surface of

Ryo KOGA

Shigeki
MASUNAGAA study on accumulation andhousehold equipments such as bathroom, toilet, etc.

removal characteristics of dirt

On the purpose of this study, it is to clarify a characteristic of the materials surface to improve

inducing fungal growth on theadhesion restraint to the materials surface of the dirt, removal efficiency.

resin surface of household

To achieve the purpose, it is to clarify the kind of the dirt, and to quantity it in prefabricatedequipmentbathroom. Secondary, it is to clarify a correlation of the density every dirt kind and the fungaldensity. Third, it is to clarify adhesion mechanism to the materials surface of the dirt.

The aim of this study was to establish a method of composition search and performance evaluation

Kento SHIOTA

AtsumiMIYAKEThe study on method offor propellants consisting of energetic ionic liquid (EIL) system. This study focused on ammonium

composition search anddinitramide as base of eutectic EIL. For composition search, EIL-propellants compositions wereperformance evaluation fordetermined based on melting point depression mechanism and reactivity of the EIL-propellants.

propellants consisting ofMixing ratio of the propellants were determined from results of melting point prediction andenergetic ionic liquid system

specific impulse calculation. Combustion properties of the propellants were obtained withcombustion test for the performance evaluation.

Study on the behavior ofradioactive cesium in waste
Hiroshi

Hidetoshi

FUJIWARA

KURAMOCHI

incineration facilities anddevelopment of adecontamination technology forcontaminated incineration
residue

This study aimed to promote proper and smooth incineration treatment for the waste contaminatedby radioactive cesium (r-Cs). To understand the behavior of r-Cs during incineration of the waste
contaminated by r-Cs, r-Cs distribution ratio to incineration residues and r-Cs leachability from theresidues were systematically investigated at actual different incineration plants, and then the impactof waste materials as well as furnace types on the behavior were revealed. In addition, themechanism of r-Cs distribution to incineration residues and its chemical forms were discussed.
Moreover, a thermal treatment technology for removing r-Cs from contaminated incineration
residues was developed.