Publications by authors named "Riku Okada"
Article Synopsis
- λ-phosphinine derivatives have high photoluminescent quantum yield (PLQY) values but have been underused in blue OLEDs due to low external quantum efficiency (EQE) rates, which have never surpassed 2.4%.
- In this study, two new blue λ-phosphinine derivatives, CN-COCF and COMe-CHO, were developed and their solid-state photophysical properties were analyzed.
- The research found that using appropriate host materials with certain characteristics helped achieve blue OLEDs with an improved EQE of over 4%, marking significant progress in this field.
[Relationship between cough peak flow and onset of pneumonia in residents of geriatric health services facilities].
Nihon Ronen Igakkai Zasshi
December 2020
Aim: Sputum expectoration is associated with cough strength, which can be evaluated by cough peak flow (CPF). Since sputum expectoration can be difficult for patients with reduced CPF, they are more likely to have risk factors for pneumonia. We conducted a study to clarify factors contributing to CPF in residents of geriatric health services facilities and to assess the relationship between CPF and the onset of pneumonia.
View Article and Find Full Text PDF2,5-Diketopiperazines (DKPs) are widely recognized as chiral molecules with great potential in medicinal chemistry. Complete separation of DKP stereoisomers is very important for efficiently investigating the chemical characteristics of DKPs. The combination of esterification and acylation caused the enantiomers of cyclo(d-Ala-d-Ala) and cyclo(l-Ala-l-Ala) to ring-open and generate their dipeptide derivatives.
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