著者

Takayama Tomoaki Iwase Akihide Kudo Akihiko

出版者

The Chemical Society of Japan

雑誌

Bulletin of the Chemical Society of Japan (ISSN:00092673)

巻号頁・発行日

2015

被引用文献数

46

---

Single-crystal KCaSrTa₅O₁₅ nanorods were successfully synthesized by a polymerized complex method. SEM and TEM observations revealed that the nanorods growing along with the c-axis of the tungsten bronze structure possessed 40–100 nm of a diameter and 100–300 nm of a length. Tb(0.03 atom%)-doped KCaSrTa₅O₁₅ nanorods gave a green luminescence due to the ⁵D₄→⁷F₆ and ⁵D₄→⁷F₅ transition of Tb³⁺, when the KCaSrTa₅O₁₅ host was excited. The intensity of the luminescence was much higher than that by polycrystalline KCaSrTa₅O₁₅ prepared by a solid-state reaction. This indicates that nonradiative deactivation at grain boundaries was suppressed in the KCaSrTa₅O₁₅ nanorods compared to the polycrystalline KCaSrTa₅O₁₅. NiO cocatalyst-loaded KCaSrTa₅O₁₅ nanorods split water into H₂ and O₂ with 6.6% of an apparent quantum yield at 254 nm. The efficiency was three times higher than that of the polycrystalline KCaSrTa₅O₁₅. The KCaSrTa₅O₁₅ nanorods also showed photocatalytic activity for CO₂ reduction, when a Ag-cocatalyst was loaded. Stoichiometric amounts of CO and H₂ as reduction products and O₂ as an oxidation product were obtained. The activity for CO₂ reduction was improved by adding NaHCO₃ into the reactant solution, giving about 90% of a CO selectivity (CO/(CO+H₂)).

著者

Kudo Akihiko Hirano Hiroshi

出版者

日本組織細胞化学会

雑誌

Acta histochemica et cytochemica (ISSN:00445991)

巻号頁・発行日

vol.32, no.3, pp.229-233, 1999

被引用文献数

5 6 8

---

In histochemistry, image analysis has become quite common and is now regarded as a powerful tool that gives us semi-quantitative and precise interpretation on the obtained image data. However, image analysis itself is a time-consuming and laborious work, and so researches in the laboratory desire to make this task proceed as automatically as possible. In NIH Image and Adobe Photoshop^<【○!R】> software running on Power Macintosh computers, processes by automation are available in both programs, though they are quite different in each software. By use of both of these programs, the analysis processes become easier to set up. To automatically process the data, the suitable preprocessing of digital image data is required. That is, image processing programs are equipped with many processing programs, such as those for filtering, defining the threshold of images, or masking uninteresting areas. Additionally, a method for adequate labeling of the target substances and controlled conditions for the image digitization are always helpful.