The fiber orientation of cow leather sheets corresponding to the corium of the middle layer in the cow skin was studied by measuring the angular dependence of transmitted microwave intensity and the complex dielectric constant at a microwave frequency of 3.9 GHz. The direction of the minimum transmitted microwave intensity and the maximum dielectric loss agrees with that of the maximum mechanical breaking strength, suggesting that the collagen fibers constituting the cow leather should be preferably oriented in the direction of minimum transmitted microwaves and the maximum dielectric loss. The electron microphotograph supported this suggestion. The main chain direction of collagen fibers and the degree of orientation varied from position to position in the sheet. The present microwave method is convenient for quick determination of the orientation of collagen fibers in the cow skin. It can be applied non-destructively and contact-freely.

Pig skin

Intensity

Collagen fiber

Microwave oven

Breaking strength

Dielectric loss

Source

Cite

Citations (15)

Simultaneous Multifrequency Ultrasonography the Principle and Technology

Hirohide Miwa Hisashi Hayashi T. Shimura K. Murakami

10.1109/ultsym.1981.197703

Cite

Citations (19)

A potential role of cholesterol uptake capacity, a new measure for high-density lipoprotein functionality, in coronary risk stratification

Atherosclerosis (2016)

A. Harada Ryuji Toh K. Murakami Maria Kiriyama K Yoshikawa

Reverse cholesterol transport

Efflux

High-density lipoprotein

Risk Stratification

10.1016/j.atherosclerosis.2016.07.108

Cite

Citations (0)

Real-Time Nonlinear Parameter Tomography Using Impulsive Pumping Waves

IEEE Transactions on Sonics and Ultrasonics (1984)

Nobuyuki Ichida Takuso Sato Hirohide Miwa K. Murakami

Absrruci-In this paper a novel real-time tomographic system for imaging the nonlinear parameter B/A of biological objects is proposed. This parameter is related closely to the detailed structure and property of tissues, and may well provide a new dimensional and powerful tool for ultrasonic tissue characterization. In this system an impulsive, relatively high-power pumping wave is applied from a direction perpendiculax to the continuous low-intensity high-frequency probing wave so that the phase of the probing wave is modulated instantly by the product of the parameter B/A of the object and pressure of the pumping wave. Then the resulting spatially-modulated probing wave is detected and demodulated to derive the distribution of B/A along the probing beam. An inverse-filtering operation is employed to compensate for the spread of the pumping wave. The processes are repeated by shifting the position of the probing beam and a two-dimensional image is obtained. A prototype of the imaging system is constructed and images related to the nonlinear parameter of phantoms and human tissues are obtained. The usefulness of this method is shown in these experimental results.

10.1109/t-su.1984.31548

Cite

Citations (47)

Serum ascorbic acid and HDL cholesterol in a healthy elderly Japanese population.

PubMed (1990)

Ryota Itoh Kei Yamada Jun Oka H Echizen Yasuo Suyama

The relationships between HDL cholesterol and serum ascorbic acid were examined in 79 male and 96 female healthy elderly Japanese, aged 60 and over. A significant positive correlation between serum HDL cholesterol and ascorbic acid was observed both in males (r = .243, p less than 0.05) and in females (r = .376, p less than 0.01). The results of multiple regression analyses indicated that serum ascorbic acid is a predictor of serum HDL cholesterol accounting for about 5% and 11% of its total variation in male and female subjects, respectively. The effect of age, BMI, status of physical activity, alcohol ingestion and cigarettes consumption, serum triglycerides and total cholesterol were taken into account as potentially confounding variables.

Source

Cite

Citations (8)