巻号一覧
前身誌
21 巻, 2 号
選択された号の論文の4件中1～4を表示しています
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-不均一はおいしい?-上田 隆宣2007 年 21 巻 2 号 p. 3-11
発行日: 2007/06/25
公開日: 2014/02/12
ジャーナル フリーRheology measurment is usualy use linear range and homogenious status. In this paper, I will present some rheological measurement hints using heterogeneous status, such as multi frequency measurment method, nonlinear analysis using Fourier-transform and Cox-Mertz rule.抄録全体を表示PDF形式でダウンロード (1231K) -
Kohei Kani, Jun-ichi Horinaka, Toshikazu Takigawa2007 年 21 巻 2 号 p. 25-33
発行日: 2007/06/25
公開日: 2014/02/12
ジャーナル フリーThe effects of the added salt concentration and added salt species on the rheological properties of gellan aqueous solutions in the dilute regime were investigated in terms of the steady shear and dynamic viscoelasticity measurements. The zero-shear viscosity (η0) obtained from those measurements indicated that the chain conformation in random-coil state became more compact with increasing salt concentration in the solution due to the shielding effect of the ions from the salt, but the conformation was independent of the salt species added, suggesting that the chain conformation was dominated by the ionic strength. The crossover concentration (cc) for η0· was estimated. The value of cc, increased with increasing salt concentration due to the change in conformation of the polymer chains. The mean-square radius of gyration of the polymer chains were calculated from η 0 and the dependence of the radius on cs, was discussed.抄録全体を表示PDF形式でダウンロード (858K) -
白崎 芳夫, 岩佐 康行, 下山 和弘, 立石 哲也, 林 和彦2007 年 21 巻 2 号 p. 34-39
発行日: 2007/06/25
公開日: 2014/02/12
ジャーナル フリーThe mechanical properties and bone density of hypertensive rat mandible bone were evaluated for the spontaneously hypertensive rats (SHR) and salt-sensitive hypertensive rats (Dahl S). Dynamic stiffness and phase-lag (tan δ) were measured with a viscoelastic spectrometer. The static compression test was performed with an Instron-type universal testing machine. Bone mineral content was determined using dual energy X-ray absorptiometry (DXA method). Two kinds of bone samples were used: The first kind of samples (group 1) were taken from the spontaneously hypertensive rats of 36 week old. The second ones (group 2) were taken from the salt-sensitive hypertensive rats fed with high saline meals from 12 week to 34 week. Mechanical properties of SHR were not different from those of the control, whereas those of Dahl S were significantly different. Bone densities of both SHR and Dahl S were significant differently from those of the respective control rats. SHR exhibited higher density than the control, while Dahl S exhibited lower density than the control.抄録全体を表示PDF形式でダウンロード (636K) -
林 和彦, 白崎 芳夫, 赤居 正美, 立石 哲也2007 年 21 巻 2 号 p. 40-44
発行日: 2007/06/25
公開日: 2014/02/12
ジャーナル フリーInvestigation of the influence of direct current on ligament healing was conducted by applying 10 μA to the patellar ligament of the adult rabbits. After time periods for electrical stimulation, the combined effect of biomechanical and biochemical processes was analyzed. The results were compared with the non-stimulated, opposite side patellar ligament and with the normal ligament tissue. Application of electrical stimulation led to higher tensile stiffness through earlier change of the collagen types in the newly-formed tissue, resulting in significant differences in tissue components between the stimulated and non-stimulated tissue.抄録全体を表示PDF形式でダウンロード (601K)
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