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Radiation-Induced Luminescence for Applying to Retrospective Dosimetry

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Radiation-Induced Luminescence for Applying to Retrospective...

作者： h.fujita Y.Nakano T.Saito Nuclear Fuel Cycle Engineering Laboratories JAEA

INTRODUCTION:It is well known that natural quartz exposed to prior ionizing radiation emits luminescence by subsequent exposure to heat or light,i.e.,thermoluminescence (TL) or optically stimulated luminescence (OSL),respectively(e.g.).These luminescence signals have been widely applied to dating and retrospective *** characteristics of natural quartz are dependent on their origins, thermal histories,impurity contents,***, emission mechanism of luminescence from Japanese quartz has not been explained,so far.

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俯仰马唐草地载畜量季节变化与老通草的动态

国外畜牧学（草原与牧草） 1993年第2期 35-37页

作者：赵楠 h.fujita L.R.humphreys

以前在澳大利亚昆士兰东南部Mount Cotton地区曾行播过老通草的俯仰马唐草地,采用单因子组合载畜量季节变化,放牧绵羊3年(1985～1987)。老通草是平均半衰期为4.2个月的短命植物(范围1.6～10.3),死亡速率与最初的种植密度呈正相关。试验... 详细信息

以前在澳大利亚昆士兰东南部Mount Cotton地区曾行播过老通草的俯仰马唐草地,采用单因子组合载畜量季节变化,放牧绵羊3年(1985～1987)。老通草是平均半衰期为4.2个月的短命植物(范围1.6～10.3),死亡速率与最初的种植密度呈正相关。试验的头两年,老通草的存活率很低,是由于生境不利于幼苗更新,以及种子难以保存所致。但通过以下的处理:①春季一初夏盛花期轻牧(5只羊/hm^2);②盛夏短期重牧以产生“秃斑地”;③晚夏—秋季中度或重牧(18或27只羊/hm^2),以减少俯仰马唐草的竞争,促进老通革能良好扩展。

关键词：马唐老通草季节变化

A functionalized activated carbon adsorbent prepared from waste amidoxime resin by modifying with h_(3)PO_(4) and ZnCl_(2) and its excellent Cr(Ⅵ)adsorption

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International Journal of Minerals,Metallurgy and Materials 2024年第3期31卷 585-598页

作者： Chunlin he Yun Liu Mingwei Qi Zunzhang Liu Yuezhou Wei Toyohisa fujita Guifang Wang Shaojian Ma Wenchao Yang School of Resources Environment and MaterialsGuangxi UniversityNanning 530004China State Key Laboratory of Featured Metal Materials and Life-cycle Safety for Composite Structures Guangxi UniversityNanning 530004China School of Nuclear Science and Technology University of South ChinaHengyang 421000China School of Nuclear Science and Engineering Shanghai Jiao Tong UniversityShanghai 200240China Key Laboratory of New Low-carbon Green Chemical Technology Education Department of Guangxi Zhuang Autonomous RegionNanning 530004China

With the application of resins in various fields, numerous waste resins that are difficult to treat have been produced. The industrial wastewater containing Cr(Ⅵ) has severely polluted soil and groundwater environments, thereby endangering human health. Therefore, in this paper, a novel functionalized mesoporous adsorbent PPR-Z was synthesized from waste amidoxime resin for adsorbing Cr(Ⅵ). The waste amidoxime resin was first modified with h3PO4 and ZnCl_(2), and subsequently, it was carbonized through slow thermal decomposition. The static adsorption of PPR-Z conforms to the pseudo-second-order kinetic model and Langmuir isotherm, indicating that the Cr(Ⅵ) adsorption by PPR-Z is mostly chemical adsorption and exhibits single-layer adsorption. The saturated adsorption capacity of the adsorbent for Cr(Ⅵ) could reach 255.86 mg/g. The adsorbent could effectively reduce Cr(Ⅵ) to Cr(Ⅲ) and decrease the toxicity of Cr(Ⅵ) during adsorption. PPR-Z exhibited Cr(Ⅵ) selectivity in electroplating wastewater. The main mechanisms involved in the Cr(Ⅵ) adsorption are the chemical reduction of Cr(Ⅵ) into Cr(Ⅲ) and electrostatic and coordination interactions. Preparation of PPR-Z not only solves the problem of waste resin treatment but also effectively controls Cr(Ⅵ) pollution and realizes the concept of “treating waste with waste”.

关键词： waste amidoxime resin mesoporous adsorbent h_(3)PO_(4)and ZnCl_(2)processing Cr(VI)adsorption electroplating wastewater

Solvent extraction of scandium from leaching solution of red mud roasted with ammonium sulfate using D2EhPA/TBP

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Journal of Rare Earths 2024年第10期42卷 1943-1949页

作者： Fucheng Li Xinsheng Li Lei Shi Xiang Li Duoqiang Liang Yuezhou Wei Toyohisa fujita School of Resources Environment and MaterialsGuangxi University State Key Laboratory of Featured Metal Materials and Life-cycle Safety for Composite Structures Guangxi University School of Nuclear Science and Technology University of South China

Red mud is an important secondary resource for scandium *** red mud leaching solution containing scandium in this study was derived from environmentally friendly ammonium sulfate roasting and water leaching process.A synergistic extraction with a mixture of di（2-ethylhexyl） phosphate acid（D2EhPA） and tributyl phosphate（TBP） for recovery of scandium from red mud leaching solution is *** effects of D2EhPA concentration,h2SO4concentration,rare earth elements,dosage of TBP,phase ratio（A/O）,contact time and h2O2concentration on scandium extraction were *** results show that more than 99% scandium is extracted under the optimal conditions while Fe,Al,Ti,Ca and rare earth elements（Ce,Y,La,Nd,Er,etc.） are hardly *** stripping efficiency of Sc reaches above 92.37% under the optimal stripping conditions of 5 mol/L NaOh with an A/O of 1 at 90℃ for 30 *** proposed technology could provide an effective method for extraction of scandium from red mud leaching solution.

关键词： Scandium Red mud leaching solution D2EhPA/TBP Solvent extraction Rare earths

Size and shape effects on Curie temperature of ferromagnetic nanoparticles

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中国有色金属学会会刊：英文版 2007年第6期17卷 1451-1455页

作者：曹玲飞谢丹郭明星 h.S. Park T. fujita School of Engineering University of Tokyo Bunkyo-ku Tokyo 113-8656 Japan Laboratory of Crystallography Department of MaterialsETH-ZürichCH-8093 Zürich Switzerland School of Materials Science and Engineering Central South University

A simplified model was developed to describe the Curie temperature suppression of ferromagnetic nanoparticles. Based on a size and shape dependent model of cohesive energy, the critical temperature variations of ferromagnetic nanoparticles were deduced. It is predicted that the Curie temperature of nanoparticles depends on both size and shape conditions, among which the temperature suppression is strongly influenced by the particle size and the shape effect is comparably minor. The calculation values for freestanding nanoparticles are in good agreement with other theoretical model and the experimental results. The model is also potential for predictions for the nanoparticles embedded in different substrates.

关键词：纳米粒子铁磁体居里温度尺寸形状效应

A reactor system combining reductive dechlorination with co-metabolic oxidation for complete degradation of tetrachloro-entylene

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Journal of Environmental Sciences 2002年第4期14卷 445-450页

作者： TAE hO LEE MIChIhIKO IKE MASANORI fujita Department of Environmental Engineering Osaka University 2-1 YamadaokaDepartment of Environmental Engineering Osaka University 2-1 YamadaokaDepartment of Environmental Engineering Osaka University 2-1 Yamadaoka Suita Osaka 565-0871 Japan.Suit

A laboratory sequential anaerobic aerobic bioreactor system, which consisted of an anaerobic fixed film reactor and two aerobic chemostats, was set up to degrade tetrachloroethylene (PCE) without accumulating highly toxic degradation intermediates. A soil enrichment culture, which could reductively dechlorinate 900 μM (ca. 150 mg/L) of PCE stoichiometrically into cis 1,2 dichloroethylene ( cis DCE), was attached to ceramic media in the anaerobic fixed film reactor. A phenol degrading strain, Alcaligenes sp. R5, which can efficiently degrade cis DCE by co metabolic oxidation, was used as inoculum for the aerobic chemostats consisted of a transformation reactor and a growth reactor. The anaerobic fixed film bioreactor showed more than 99 % of PCE transformation into cis DCE in the range of influent PCE concentration from 5 μM to 35 μM at hydraulic retention time of 48h. On the other hand, efficient degradation of the resultant cis DCE by strain R5 in the following aerobic system could not be achieved due to oxygen limitation. however, 54% of the maximum cis DCE degradation was obtained when 10 μmol of hydrogen peroxide (h 2O 2) was supplemented to the transformation reactor as an additional oxygen source. Further studies are needed to achieve more efficient co metabolic degradation of cis DCE in the aerobic reactor.

关键词： anaerobic aerobic bioreactor co oxidation reductive dechlorination tetrachloroethylene

A Novel System for Xylem Cell Differentiation in Arabidopsis thaliana

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Molecular Plant 2015年第4期8卷 612-621页

作者： Yuki Kondo Takashi fujita Munetaka Sugiyama hiroo Fukuda Department of Biological Sciences Graduate School of Science The University of Tokyo 7-3-1 Hongo Bunkyo-ku tokyo 113-0033 Japan Botanical Gardens Graduate School of Science Tile University of Tokyo 3-7-1 Hakusan Bunkyo-ku Tokyo 112-0001 Japan

During vascular development, procambial and cambial cells give rise to xylem and phloem cells. Because the vascular tissue is deeply embedded, it has been difficult to analyze the processes of vascular development in detail. here, we establish a novel in vitro experimental system in which vascular development is induced in Arabidopsis thaliana leaf-disk cultures using bikinin, an inhibitor of glycogen synthase kinase 3 proteins. Transcriptome analysis reveals that mesophyll cells in leaf disks synchronously turn into procambial cells and then differentiate into tracheary elements. Leaf-disk cultures from plants expressing the procambial cell markers TDRpro：GUS and TDRpro：YFP can be used for spatiotemporal visualization of procambial cell formation. Further analysis with the tdr mutant and TDIF （tracheary element differentiation inhibitory factor） indicates that the key signaling TDIF-TDR-GSK3s regulates xylem differentiation in leaf-disk cultures. This new culture system can be combined with analysis using the rich material resources for Arabidopsis including cell-marker lines and mutants, thus offering a powerful tool for analyzing xylem cell differentiation.

关键词： Arabidopsis thaliana bikinin leaf-disk culture transcriptome tracheary element differentiation signaling

Targeting Glycinebetaine for Abiotic Stress Tolerance in Crop Plants:Physiological Mechanism,Molecular Interaction and Signaling

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Phyton-International Journal of Experimental Botany 2019年第3期88卷 185-221页

作者： Mirza hasanuzzaman Aditya Banerjee M.h.M.Borhannuddin Bhuyan Aryadeep Roychoudhury Jubayer Al Mahmud Masayuki fujita Department of Agronomy Faculty of AgricultureSher-e-Bangla Agricultural UniversityDhakaBangladesh Post Graduate Department of Biotechnology St.Xavier’s College(Autonomous)30Mother Teresa SaraniKolkataWest BengalIndia Laboratory of Plant Stress Responses Department of Applied Biological ScienceFaculty of AgricultureKagawa University2393 IkenobeMiki-choKita-gunKagawaJapan Bangladesh Agricultural Research Institute JoydebpurGazipurBangladesh Department of Agroforestry and Environmental Science Faculty of AgricultureSher-e-Bangla Agricultural UniversityDhakaBangladesh

In the era of climate change,abiotic stresses(e.g.,salinity,drought,extreme temperature,flooding,metal/metalloid(s),UV radiation,ozone,etc.)are considered as one of the most complex environmental constraints that restricts crop production *** of stress-tolerant crop cultivars is the most auspicious way of surviving this constraint,and to produce these types of tolerant *** bioengineering mechanisms involved in stress signaling are being adopted in this *** example of this kind of manipulation is the osmotic *** quarternary ammonium compound glycinebetaine(GB),also originally referred to as betaine is a methylated glycine *** the betaines,GB is the most abundant one in plants,which is mostly produced in response to dehydration caused by different abiotic stresses like drought,salinity,and extreme *** helps in decreased accumulation and detoxification of ROS,thereby restoring photosynthesis and reducing oxidative *** takes part in stabilizing membranes and *** is also involved in the stabilization and protection of photosynthetic components,such as ribulose-1,5-bisphosphate carboxylase/oxygenase,photosystem II and quarternary enzyme and protein complex structures under environmental *** was found to perform in chaperone-induced protein *** addition,GB can confer stress tolerance in very low concentrations,and it acts in activating defense responsive genes with stress ***,field application of GB has also shown protective effects against environmental adversities increasing crop yield and *** this review,we will focus on the role of GB in conferring abiotic stress tolerance and the possible ways to engineer GB biosynthesis in plants.

关键词： Osmolytes compatible solutes biostimulants proline amino acids stress signaling

Electrochemical recycling of Pd and Ag from simulated high-level liquid waste

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Transactions of Nonferrous Metals Society of China 2022年第3期32卷 1031-1040页

作者： You-bin WANG Rui ZOU Yue-zhou WEI Tsuyoshi ARAI Toyohisa fujita School of Resources Environment and MaterialsGuangxi UniversityNanning 530004China Guangxi Key Laboratory of Processing for Non-ferrous Metal and Featured Materials Guangxi UniversityNanning 530004China Department of Material Science and Engineering Shibaura Institute of TechnologyTokyo 3-9-14Japan

For the recycling of Pd and Ag from high-level liquid waste(hLLW), the electrochemical behaviors of Pd and Ag in the simulated hNO_(3) solutions were investigated by cyclic voltammetry and potentiostatic *** electron microscopy(SEM) and X-ray diffraction(XRD) were used to-observe the deposits morphology and to evaluate their composition. The results indicate that the formation of NO_(2)^(-)electrodeposited. When Pd and Ag are electrodeposited together, more metals are gained in the same time, and the deposited Ag does not dissolve in this situation. The metals are electrodeposited completely at the potentials from -0.4 to -0.6 V(vs MSE) and the deposits contai-n Ag and Pdhx. The electrodeposition of Pd can boost h-ydrogen evolution,and then the reaction between h;and NO_(2)^(-)is sped up, thereby lowering the concentration of NO_(2)^(-)and inhibiting the dissolution of Ag.

关键词： electrodeposition metals recovery nitrite generation promoting effect morphology characteristics