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Loss on Ignition-Based Indices for Evaluating Organic Matter Characteristics of Littoral Sediments

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Pedosphere 2017年第5期27卷 978-984页

作者： Narong TOUCH Tadashi HIBINO Hiroki takata Satoshi YAMAJI Coastal Engineering Laboratory Department of Civil and Environmental Engineering Hiroshima University

Understanding organic matter characteristics （e.g., amount and state） of sediments is necessary for evaluating both the sediment and water environments; however, methods that have been proposed to investigate these characteristics are relatively expensive. This study attempted to evaluate the organic matter characteristics of littoral sediments by employing solely the loss on ignition （LOI） method, which is the most economical and accessible method in developing countries. Different types of sediments were first oven dried at 100 ~C and then continuously burned at 200, 300, 400, 500, and 600 ~C for 4 h at each temperature. The mass LOI at each temperature was calculated and compared with the 100 ℃oven-dried weight. Our results suggested that the mass LOI across the temperature range of 200-300 ℃（LOI200-300）：mass LOI at 600 ℃ （LOI600） ratio （LOI200-300/LOI600） could represent different types of sediments as well as the organic matter：organic C ratio. Compared with the sediments unaffected by wastewater, the sediments that were more influenced by the inflow of domestic wastewater had a higher LOI200-300/LOI600. Interestingly, LOI200-300/LOI600 could also represent changes in the organic matter characteristics as a function of organic matter decomposition in sediments. In conclusion, the organic matter characteristics of littoral sediments could be evaluated using solely the LOI method, particularly with LOI200 - 300/LOI600.

关键词： C loss decomposition mass loss on ignition organic matter state sediment type

基于固有应变的旧钢桥加固焊接应力和变形分析

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合肥工业大学学报（自然科学版） 2024年第7期47卷 1003-1008页

作者：杜洋华罗宇赵晟大沢直樹上海交通大学船舶海洋与建筑工程学院上海200240

文章针对某大型桥梁实际加固修复焊接,利用独自开发的焊接变形分析系统软件,预测不同工艺和工况条件下大桥的应力和变形,获得不同条件下桥梁变形和应力的分布规律,确认该大型桥梁加固焊接施工方案的安全性。同时,该文为实际焊接工艺的... 详细信息

文章针对某大型桥梁实际加固修复焊接,利用独自开发的焊接变形分析系统软件,预测不同工艺和工况条件下大桥的应力和变形,获得不同条件下桥梁变形和应力的分布规律,确认该大型桥梁加固焊接施工方案的安全性。同时,该文为实际焊接工艺的优化提供了技术解决方案。

关键词：桥梁焊接加固焊接应力变形固有应变数值模拟焊接工艺

A robust homogeneous binding assay for α4β2 nicotinic acetylcholine receptor

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Acta Pharmacologica Sinica 2005年第10期26卷 1175-1180页

作者： naoki SUTO Tsuyoshi OGIKU Discovery and Pharmacology Research Laboratories Tanabe Seiyaku Co 2-50 Kawagishi 2-Chome Toda Saitama 335-8505 Japan Discovery and Pharmacology Research Laboratories Tanabe Seiyaku Co 2-50 Kawagishi 2-Chome Toda Saitama 335-8505 Japan

Aim: To develop a homogeneous high-throughput screening （HTS） assay based on scintillation proximity assay （SPA） technology for identification of novel α4β2 nicotinic acetylcholine receptor （nAChR） modulators. Methods: Membrane preparation of HEK293 cells expressing α4β2 nAChR, [3H]cytisine and wheat germ agglutinin （WGA）-coupled microbeads were used to develop an HTS assay based on SPA technology. This method was validated against a conventional filter binding approach and applied to large-scale screening of a library containing 32000 synthetic compounds. Intracellular calcium measurement was carried out to verify the bioactivities of the hits found by the SPA assay. Results: IC50values of 2 reference compounds （epibatidine and RJR 2403） determined by SPA and filter binding methods were comparable and consistent with those reported elsewhere. A total of 54 compounds, showing more than 60% competitive inhibition on [3H]cytisine binding to α4β2 nAChR, were identified initially following an HTS campaign. Secondary screening confirmed that 17 compounds with novel chemical structures possessed relatively high binding affinity to α4β2 nAChR （Ki50% inhibition on ABT-594-induced calcium mobilization while none showed any agonistactivity. Conclusions: This homogeneous binding assay is a highly efficient, amenable to automation and robust tool to screen potential α4β2 nAChR modulators in an HTS setting. Its application may be expanded to other membrane receptors and ion channels.

关键词： nicotinic acetylcholine receptor: scintillation proximity assay high-throughput screening

Magic sheets:Visual cryptography with common shares

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Computational Visual Media 2018年第2期4卷 185-195页

作者： naoki Kita Kazunori Miyata Japan Advanced Institute of Science and Technology Nomi923-1292Japan.

Visual cryptography(VC) is an encryption technique for hiding a secret image in distributed and shared images(referred to as shares). VC schemes are employed to encrypt multiple images as meaningless,noisy patterns or meaningful images. However,decrypting multiple secret images using a unique share is difficult with traditional VC. We propose an approach to hide multiple images in meaningful shares. We can decrypt multiple images simultaneously using a common share, which we refer to as a magic sheet. The magic sheet decrypts multiple secret images depending on a given share. The shares are printed on transparencies, and decryption is performed by physically superimposing the transparencies. We evaluate the proposed method using binary, grayscale,and color images.

关键词： visual cryptography (VC) information hiding secret sharing

Structural Analysis of Eu_2Mn_(2/3)Ta_ 4/3O_7 with a Pyrochlore-Related Structure

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Journal of Rare Earths 2004年第1期22卷 172-174页

作者：陈刚 Satoh Hirohisa Kamegashira naoki Department of Applied Chemistry Department of Materials Science

Eu 2Mn 2/3Ta 4/3O 7 specimen was synthesized from Eu 2O 3, MnO and Ta 2O 5 in a reducing atmosphere. Structure analysis was carried out by Rietveld method from X-ray diffraction data. The X-ray diffraction profile calculated with monoclinic C2/c model was in a good agreement with the observed X-ray diffraction patterns since several small peaks of super lattice could be also assigned with C2/c symmetry in addition to fundamental reflection peaks. Eu 2Mn 2/3Ta 4/3O 7 has two kinds of distorted (Mn, Ta)O 6 octahedra and HTB layers, which deviates from the regular forms. Europium atoms coordinate to eight or seven oxygen atoms and lead to two kinds of polyhedra, EuO 8 and EuO 7 in this compound.

关键词： complex oxide structural analysis X-ray diffraction rare earths

Generation of glyceraldehyde-derived advanced glycation end-products in pancreatic cancer cells and the potential of tumor promotion

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World Journal of Gastroenterology 2017年第27期23卷 4910-4919页

作者： takanobu takata tadashi ueda akiko sakasai-sakai masayoshi takeuchi department of advanced medicine medical research institutekanazawa medical university

To determine the possibility that diabetes mellitus promotes pancreatic ductal adenocarcinoma via glyceraldehyde (GA)-derived advanced glycation-end products (GA-AGEs). METHODSPANC-1, a human pancreatic cancer cell line, was treated with 1-4 mmol/L GA for 24 h. The cell viability and intracellular GA-AGEs were measured by WST-8 assay and slot blotting. Moreover, immunostaining of PANC-1 cells with an anti-GA-AGE antibody was performed. Western blotting (WB) was used to analyze the molecular weight of GA-AGEs. Heat shock proteins 90α, 90β, 70, 27 and cleaved caspase-3 were analyzed by WB. In addition, PANC-1 cells were treated with GA-AGEs-bovine serum albumin (GA-AGEs-BSA), as a model of extracellular GA-AGEs, and proliferation of PANC-1 cells was measured. RESULTSIn PANC-1 cells, GA induced the production of GA-AGEs and cell death in a dose-dependent manner. PANC-1 cell viability was approximately 40% with a 2 mmol/L GA treatment and decreased to almost 0% with a 4 mmol/L GA treatment (each significant difference was P < 0.01). Cells treated with 2 and 4 mmol/L GA produced 6.4 and 21.2 μg/mg protein of GA-AGEs, respectively (P < 0.05 and P < 0.01). The dose-dependent production of some high-molecular-weight (HMW) complexes of HSP90β, HSP70, and HSP27 was observed following administration of GA. We considered HMW complexes to be dimers and trimers with GA-AGEs-mediated aggregation. Cleaved caspase-3 could not be detected with WB. Furthermore, 10 and 20 μg/mL GA-AGEs-BSA was 27% and 34% greater than that of control cells, respectively (P < 0.05 and P < 0.01). CONCLUSIONAlthough intracellular GA-AGEs induce pancreatic cancer cell death, their secretion and release may promote the proliferation of other pancreatic cancer cells.

关键词： Tumor promotion Glyceraldehyde-derived advanced glycation-end products Pancreatic ductal adenocarcinoma

A trial of simple and easy health monitoring for power poles by using ‘ipod’

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Science China(Technological Sciences) 2015年第4期58卷 712-719页

作者： ORAI naoki ICHII Koji ISHII Shiho Graduate School of Engineering Hiroshima University

At present,the regular inspection of power poles is just a visual inspection based on the inspector’s ***,overlook of the deteriorated poles can come *** order to avoid an accident due to the overlook of the deteriorated poles,the authors propose a simple and easy health monitoring method for power poles using‘i Pod’.Since the applicability of‘i Pod’as a vibration sensor in this purpose was not clear,it was examined in the following ***,the authors proposed a tool to fix the‘i Pod’to a power pole,and the performance of‘i Pod’as a vibration measurement device was compared with a conventional acceleration *** a result,it was confirmed that‘i Pod’could give almost the same response with the conventional sensor in terms of the observed predominant ***,vibration measurements were conducted at power poles in a *** a result,the observed predominant frequency corresponded to the calculated 2nd natural frequency of power *** some power poles were supported by some additional wires from the ground,the measurements were successful at almost all the ***,the authors confirmed that the‘i Pod’based health monitoring is possible.

关键词： iPod health monitoring power pole natural frequency

Cryogenic Cavitating Flow in 2D Laval Nozzle

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Journal of Thermal Science 2003年第2期12卷 157-161页

作者： naoki Tani Toshio Nagashima Department of Aeronautics and Astronantics University of TokyoJapanDepartment of Aeronautics and AstronanticsUniversity of TokyoJapan

Cavitation is one of the troublesome problems in rocket turbo pumps,and since most of high-efficiency rocket propellants are cryogenic fluids,so called 'thermodynamic effect' becomes more evident than in *** the present *** and experimental study of liquid nitrogen cavitation in 2D Laval nozzle was carried out ,so that the influence of thermodynamic effect was *** was revealed that temperature and cavitation have strong inter-relationship with each other in thermo-sensitive cryogenic fluids.

关键词： cavitation two-phase flow CFD nozzle flow.

EFFECT OF SOLUTION EXTRUSION RATE ON MORPHOLOGY AND PERFORMANCE OF POLYVINYLIDENE FLUORIDE HOLLOW FIBER MEMBRANES USING POLYVINYL PYRROLIDONE AS AN ADDITIVE

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Chinese Journal of Polymer Science 2010年第4期28卷 527-535页

作者：陈文清 Makoto Onishi naoki Abe Department of Environment Science and Engineering College of Architecture and EnvironmentSichuan University SCU-HITACHI Environment Applied Technology Research Center Sichuan University Hitachi Plant Technologies LtdTokyo 170-8466Japan

Polyvinylidene fluoride （PVDF） hollow fiber membranes prepared from spinning solutions with different polyvinyl pyrrolidone （PVP） contents （1% and 5%） at different extrusion rates were obtained by wet/dry phase process keeping all other spinning parameters constant. In spinning these PVDF hollow fibers, dimethylacetamide （DMAc） and PVP were used as a solvent and an additive, respectively. Water was used as the inner coagulant. Dimethylformamide （DMF） and water （30/70） were used as the external coagulant. The performances of membranes were characterized in terms of water flux, solute rejection for the wet membranes. The structure and morphology of PVDF hollow fiber were examined by BET adsorption, dry/wet weight method and scanning electron microscopy （SEM）. It is found that the increase in PVP content and extrusion rate of spinning solution can result in the increase of water flux and decrease of solute rejection. The improvements of interconnected porous structure and pore size are induced by shear-thinning behavior of spinning solution at high extrusion rates, which could result in the increase of water flux of hollow fiber membranes. The increase of extrusion rate also leads to the increase of membrane thickness due to the recovery effect of elastic property of polymer chains.

关键词： Polyvinylidene fluoride Polyvinyl pyrrolidone Hollow fiber Extrusion rate