Biography:

In the past Ichiro Fujii has collaborated on articles with Naoto Tsutsumi and Satoshi Wada. One of their most recent publications is Original articleNatural history of borderline hypertension in the hisayama community, Japan—I. The relative prognostic importance of transient variability in blood pressure. Which was published in journal Journal of Chronic Diseases.

More information about Ichiro Fujii research including statistics on their citations can be found on their Copernicus Academic profile page.

Ichiro Fujii's Articles: (3)

Original articleNatural history of borderline hypertension in the hisayama community, Japan—I. The relative prognostic importance of transient variability in blood pressure

AbstractLong-term prognosis of borderline hypertensives was studied in a prospective population survey carried on since 1961 in the town of Hisayama, Japan. Five consecutive BP recordings on 1621 subjects aged 40 and over were obtained at entry, and the variability in BP between the first and fifth readings was taken into account when classifying the subject into categorical groups. Even with an estimated variability in BP in several measurements on one occasion, a large fluctuation in BP was observed in both the borderline hypertensives and the normotensives. Borderline hypertensives with a transient elevation in BP more frequently died from cardiovascular disease than did those without BP elevation, as estimated by the long-term cumulative mortality. However, there was no difference in the frequency of hypertension-related organ damage between these two groups at entry.

Photoionization of donor-acceptor complex by the internal electric field in blend of poly(vinylidene fluoride) and poly(methyl methacrylate)

AbstractThis paper presents a measurement of the photocurrent of a poled blend of 80 wt% poly(vinylidene fluoride) (PVDF) and 20 wt% poly(methyl methacrylate) (PMMA) containing 5 wt% N-phenylcarbazole (PhCz) and 1 wt% 2,4,7-trinitro-9-fluorenone (TNF) molecules and a discussion of the photoionization of the PhCz-TNF complex by the internal electric field. The high internal electric field, of the order of 106 V cm−1, created by the preferential orientation of polar PVDF β crystallites assists the photoionization of an ion-pair in the polymer matrix, and thus free photocarrier formation by the internal electric field can be expected. The photocurrent illuminated from the positive poled side corresponds to the absorption spectrum of PhCz, while the photocurrent from the negative poled side has maximum current in the absorption edge of PhCz and no photocurrent activity in the strong absorption region of PhCz below 330 nm. No photocurrent was measured for the unpoled sample. These results imply that the internal electric field induced by poling has a significant role in carrier photogeneration. Furthermore, the optical absorbance due to the charge-transfer complex between PhCz and TNF increased non-linearly with increasing poling field.

Enhanced piezoelectric properties of barium titanate–potassium niobate nano-structured ceramics by MPB engineering

AbstractBarium titanate (BaTiO3, BT)–potassium niobate (KNbO3, KN) (BT–KN) nanocomplex ceramics with various KN/BT molar ratios were prepared by the solvothermal method. From a transmittance electron microscopy (TEM) observation, it was confirmed that KN layer thickness of the BT–KN nanocomplex ceramics was controlled from 0 to 44 nm by controlling KN/BT molar ratios. Their dielectric constants were measured at room temperature and 1 MHz, and a maximum dielectric constant of around 400 was measured for the BT–KN nanocomplex ceramics with a KN thickness of 22 nm. TEM observation revealed that below KN thickness of 22 nm, BT/KN heteroepitaxial interface was assigned to the strained interface while over 22 nm, the interface was assigned to the relaxed one. These results suggested that the strained heteroepitaxial interface could be responsible for the enhanced dielectric constants.

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