Temporal variation of dissolved carbonates in the summer of Antarctic seasonal sea ice zone

第１回極域科学シンポジウム「極域大気圏を通して探る地球規模環境変動」12月1日（水） 国立極地研究所 ２階大会議

The summertime variation in Dissolved Inorganic Carbon concentration off Lutzow-Holm Bay

第１回極域科学シンポジウム「極域大気圏を通して探る地球規模環境変動」ポスター発

Nanocrystalline TiO_2 Coating for Stainless Steel and Its Corrosion Resistance

电化学方法合成钛酸乙酯 ,加入乙酰丙酮改性 ,经溶胶 凝胶过程在不锈钢表面制备了纳米TiO2 晶膜 ,FTIR ,AFM和XRD法分别对TiO2 膜进行了表征 ,基体表面修饰的TiO2 膜具有均匀完整的纳米结构 ,晶粒粒径 2 0nm ,晶型结构主要为锐钛矿型 ,采用阳极极化曲线和浸泡实验测试了纳米TiO2 晶膜在硫酸介质中的腐蚀行为 ,实验表明不锈钢表面覆盖纳米TiO2 晶膜后耐蚀性能大幅度提高Nanocrystalline TiO 2 film was prepared on the surface of stainless steel by sol-gel process. AFM and XRD were used to investigate the surface morphology and structure of nanocrystalline TiO 2 film. Polarization curves showed that there was an increase of anticorrosion property in stainless steel coating with nanocrystalline TiO 2 film in 10% H 2SO 4 solution.国家自然科学基金及安徽省自然科学基金 (0 0 0 4 6112 ) ;; 安徽省教委自然科学基金 (99j10 0 75

Heterogeneous Electrocatalytic Reduction of Maleic Acid on Nanocrystalline TiO_2 Film Modified Ti Electrode

通过电化学合成前驱体和溶胶 -凝胶法在Ti表面修饰一层纳米TiO2 膜 ,SEM ,XRD测试表明晶型为锐钛矿型 ,晶粒平均尺寸为 2 5nm .采用循环伏安法、循环方波伏安法和电解合成法研究了纳米TiO2 膜电极在硫酸介质中的氧化还原行为以及对马来酸 (maleicacid)还原的电催化活性 .结果表明 ,纳米TiO2 膜电极在阴极扫描时有两对可逆氧化还原峰 ,可逆半波电位Er1/ 2 分别为 -0 .5 3V和 -0 .92V (vs .SCE ,扫描速度 0 .0 5V·s-1) ,对应于TiO2 /Ti2 O3 和TiO2 /Ti(OH) 3 两个氧化还原电对的可逆电极过程 .其中TiO2 /Ti2 O3 电对对马来酸具有异相电催化还原活性 ,纳米TiO2 膜中的TiⅣ/TiⅢ 氧化还原电对作为媒质间接电还原马来酸为丁二酸 (butanediacid) ,反应机理为电化学偶联随后化学催化反应 (EC′)机理 .The precursor Ti(OEt)_4 was prepared by anodic dissolution of metallic titanium in absolute ethanol and direct hydrolysis to prepare nanocrystalline TiO_2 film on titanium electrode (Ti/nano-TiO_2) by a sol-gel process. SEM and XRD were used to characterize the structure of nanocrystalline TiO_2 film (anatase, 25 nm). Redox behavior and electrocatalytic activities of the Ti/nano-TiO_2 electrode were investigated by cyclic voltammetry (CV) and cyclic osteryoung square wave voltammetry (COV) and bulk electrolysis. The results indicate that there are two pairs of well-defined redox peaks for Ti/nano-TiO_2 film electrode in 1 mol/L H_2SO_4 with E r_ 1/2 of -0.53 V and -0.92 V (vs. SCE) at 0.05 V·s -1 in correspondence with TiO_2/Ti_2O_3 and TiO_2/Ti(OH)_3 reversible electrode process and the heterogeneous electrocatalytic reduction activities of TiO_2/Ti_2O_3 redox in the electrode for maleic acid. It is found that the indirect electroreduction of maleic acid to butane diacid was achieved by Ti Ⅳ/Ti Ⅲ redox system on the nanocrystalline TiO_2 film surface, the electrode reaction mechanism is the called catalytic (EC′) mechanism.安徽省自然科学基金 (Nos.0 0 0 4 531 7,0 0 0 4 61 1 2 )资助项

Direct Electrochemical Preparation of Nickel Complexes

采用金属镍为“牺牲”阳极 ,首次在无隔膜电解槽中 ,电化学溶解金属镍一步制备了纳米NiO前驱体Ni(OEt) 2 ,Ni(OBu) 2 ,Ni(OEt) 2 (acac) 2 ,Ni(OBu) 2 (acac) 2 [acac为乙酰丙酮基 ].产物通过红外光谱 (FT IR)、拉曼光谱 (Ramanspectrum)进行表征 .同时讨论了影响电合成镍醇盐及其配合物的关键因素 .实验表明 ,防止阳极钝化 ,温度控制在30～ 40℃ ,采用有机胺溴化物为导电盐 ,可以提高电合成效率Nickel complexes were directly prepared by electrochemical dissolution of nickel in non-aqueous media. The products were characterized by FT-IR spectrum and Raman spectrum. The influence of temperature and conductive additives on product yield was also investigated. The experiments at the temperature under 30～40 ℃ with R 4NBr as a conductive additive gave improve yields. The study showed that the direct electrochemical preparation of nickel complexes had high current efficiency and electrolysis yield. These nickel complexes had high purity and could be directly used as precursor of nanometer oxides.国家自然科学基金 (No .2 98730 39);; 安徽省自然科学基金 (No.0 0 0 46 112 );; 安徽省教育委员会自然科学基金资助项

Heterogeneous electrocatalytic reduction of maleic acid on nanocrystalline TiO2 film modified Ti electrode

The precursor Ti(OEt)(4) was prepared by anodic dissolution of metallic titanium in absolute ethanol and direct hydrolysis to prepare nanocrystalline TiO2 film on titanium electrode (Ti/nano-TiO2) by a sol-gel process. SEM and XRD were used to characterize the structure of nanocrystalline TiO2 film (anatase, 25 nm). Redox behavior and electrocatalytic activities of the Ti/nano-TiO2 electrode were investigated by cyclic voltammetry (CV) and cyclic osteryoung square wave voltammetry (COV) and bulk electrolysis. The results indicate that there are two pairs of well-defined redox peaks for Ti/nano-TiO2 film electrode in 1 mol/L H2SO4 with E-1/2(r) of -0.53 V and -0.92 V (vs. SCE) at 0.05 V (.) s(-1) in correspondence with TiO2/Ti2O3 and TiO2/Ti(OH)(3) reversible electrode process and the heterogeneous electrocatalytic reduction activities of TiO2/Ti2O3 redox in the electrode for maleic acid. It is found that the indirect electroreduction of maleic acid to butane diacid was achieved by Ti-IV/Ti-III redox system on the nanocrystalline TiO2 film surface, the electrode reaction mechanism is the called catalytic (EC') mechanism

カンゴ ガクセイ ガ カンゴ モデル トシテ シジスル カンゴガク ジッシュウ シドウシャ ノ ジッシュウ シドウ ホウホウ ケンキュウ ホウコク

看護学生が看護モデルとして支持する実習指導者の実習指導方法を明らかにするために、実習指導者６名に面接調査を行った。研究目的に沿ってカテゴリーを抽出し、分析した。結果、「教育者の姿勢で臨む」、「患者とのスムーズなコミュニケーションを支援する」、「メンタルヘルス面の支援をする」、「人的資源を教育に活用する」、「実習効果を上げるスキルを活用する」、「学生の能力を可能な限り引き出す」、「看護のステキを伝授する」の7 つのカテゴリーを分類した。看護モデルとして支持された実習指導者は、看護学生を大事に育てようという細やかな配慮をしていた。学生を愛し、受容し、肯定的に指導する一方で、実習指導そのものを楽しむ気持ちの余裕も伺えた。看護には、喜びや、楽しさ、専門職としての魅力があることを伝えていた