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- Abdollahi, Mehdi, 1985, et al.
(författare)
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Effect of stabilization method and freeze/thaw-aided precipitation on structural and functional properties of proteins recovered from brown seaweed (Saccharina latissima)
- 2019
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Ingår i: Food Hydrocolloids. - : Elsevier BV. - 0268-005X. ; 96, s. 140-150
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Tidskriftsartikel (refereegranskat)abstract
- - Structural, functional and nutritional properties of protein recovered from brown seaweed, S. latissima with alkaline solubilization/isoelectric precipitation as a function of different post-harvest stabilization methods were studied. The latter included freezing at −20 °C/-80 °C, oven-drying, sun-drying, freeze-drying and ensilaging. Also, the efficacy of freeze/thaw-aided precipitation (F/T) in improving protein recovery of the process was evaluated. The freeze-dried, oven-dried, and −20 °C frozen seaweeds resulted in significantly higher protein yield than the −80°C-frozen, sun-dried and ensiled biomasses. F/T increased protein precipitation and doubled total protein yield. Sun-drying and −20°C-freezing caused extensive protein degradation as revealed by SDS-PAGE and HP-SEC, while oven-drying altered the seaweed protein structure with less α-helices. Functional properties of the seaweed proteins were remarkably affected by stabilization condition and F/T, but nutritional value of the proteins was only dependent on stabilization method. Thus, to efficiently recover seaweed proteins, its post-harvest stabilization condition must be carefully chosen based on the final application of the proteins. © 2019 The Authors
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- Berbyuk, Viktor, 1953, et al.
(författare)
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Parametric optimization of motion and stiffness characteristics of passive drives of a bipedal walking robot
- 2002
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Ingår i: J. Visnyk Kyiv University, Ser. “Cybernetics”.. ; :3, s. 17-20
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Tidskriftsartikel (refereegranskat)abstract
- The problem of optimization both structural parameters of passive drives and motion of a bipedal anthropomorphic robot is studied. The motion of the robot is modeled by taking into account the kinematic characteristics of human gait. At the feet of the robot there are passive drives that are modeled by springs having piece-wise stiffness parameters. The optimization problem has been converted into a nonlinear programming problem by approximation of the generalized coordinates using smoothing cubic splines and solved numerically. Analysis of the solution has shown that the kinematic characteristics of the motion of the robot with passive drives located at the hinges of the feet are relatively close to the same characteristics of a human gait.
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