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81.
Sántiz-Gómez Marco Antonio Mazorra-Manzano Miguel Angel Ramírez-Guerra Hugo Enrique Scheuren-Acevedo Susana María Navarro-García Gerardo Pacheco-Aguilar Ramón Ramírez-Suárez Juan Carlos 《Food science and biotechnology》2019,28(3):751-757
Food Science and Biotechnology - Chemical properties of fish gelatins differ from those of conventional mammalian sources, representing an attractive technological alternative for the food... 相似文献
82.
Victor H. Pino-Ramos Gerardo Cedillo Eduardo López-Barriguete Emilio Bucio 《应用聚合物科学杂志》2019,136(44):48170
Hydrophilic biocompatible surfaces can be obtained by grafting stimuli-sensitive polymers onto commercially available medical devices. Thermo and pH-responsive polymers are two of the most studied materials due to their potential application as drug delivery systems. Poly(N-vinylcaprolactam) has a lower critical solution temperature (LCST) near to physiological temperature. However, when it is grafted with pH-sensitive moieties its LCST it is affected undergoing remarkable displacements. We studied the effect of acrylic acid (AAc), 4-vinylpyridine (4VP), and 1-vinylimidazole (Vim) on the LCST of N-vinylcaprolactam (NVCL) grafted onto silicone rubber (SR), and SR-g-NVCL (32.5 °C). The binary graft copolymers were obtained by ionizing grafting radiation using the simultaneous technique; the samples were characterized by Fourier transform infrared attenuated total reflectance (FTIR-ATR), cross-polarization magic angle spinning nuclear magnetic resonance (CP/MAS 13C-NMR), and thermogravimetrical analysis (TGA). LCST value was dramatically affected by the comonomer content; even it was observed the switching from LCST to upper critical solution temperature (UCST) for (SR-g-NVCL)-g-AAc and (SR-g-NVCL)-g-4VP samples. The observed behavior is rarely reported for binary graft copolymers. © 2019 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2019 , 136, 48170. 相似文献
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Katlijn R. N. Moelants Paul R. Smith Tristan E. Lipkie Adam J. Steinbach Gerardo Leyva Fenja C. H. Süverkrüp Joël R. Wallecan 《Journal of the American Oil Chemists' Society》2019,96(8):865-876
Structuring of fatty products is important in producing palatable food products. Saturated fat (SAFA) crystals are needed to bring structure to many products (such as bakery or confectionery). In a product control of the structure by fat nucleation and crystallization, it is important to deliver the correct performance. Many techniques only work on quiescent systems and give limited information about the sheared systems that are generally found in industrial production of products. This article presents a novel rheological technique that can be used to probe crystallization and network structure under sheared conditions. The results show that crystallization of palm oil can be divided into different key stages. These result from initial nucleation, structuring by the crystals, polymorphic transformation, further structure building, and then subsequent relaxation. Significant postcrystallization (sintering) events occur over at least a day. It is seen that the shear rate leads to possibilities for crystallization control. Higher shear gives a reduction in network strength (as measured by G′) of the initial crystal network. However, after longer posthardening, results are very similar. This work enables the development of a fast tool that can be used to monitor structure formation in fats and reveals the relative importance of the nucleation–crystallization and postcrystallization events in sheared systems. 相似文献
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Energy storage in symmetric and asymmetric supercapacitors based in carbon cloth/polyaniline–carbon black nanocomposites
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In this work, the construction of electrochemical capacitors using polyaniline–carbon black nanocomposites as electrode material is described. Symmetric and asymmetric cells were assembled. The active material was supported on carbon cloth acting as current collector as well. The electrolyte was H2SO4 0.5 M, and the selected potential range was 1 V. The electrochemical behavior of the arrayed supercapacitors was studied by cyclic voltammetry and galvanostatic charge/discharge runs. At a constant current density of 0.3 A/g, a specific capacitance value of 1039 F/g was obtained for a symmetric assembly using both electrodes prepared with polyaniline and carbon black nanocomposites. When the set is asymmetric, being the positive electrode made of polyaniline and carbon black nanocomposites, the specific capacitance value is 1534 F/g. For the latter array, the specific power and energy density values are 300 W/kg and 426 Wh/kg at 0.3 A/g, and 13 700 W/kg and 28 Wh/kg at 13.7 A/g. These results suggest a good capacity of fast energy transfer. Moreover, this asymmetric supercapacitor demonstrated a high stability over 1000 cycles being the loss of only 5%. Copyright © 2015 John Wiley & Sons, Ltd. 相似文献
88.
A new algebraic parametric identification method in time domain for multiple degrees‐of‐freedom mechanical vibrating systems with high‐order nonlinear stiffness is proposed. Parameters of mass, damping and linear and nonlinear stiffness are estimated on‐line and, simultaneously, using transient real‐time position measurements and active control force signals. Parametric identification can be applied for real‐time estimation of both symmetrical and non‐symmetrical stiffness. Parametric identification is combined with adaptive planned motion control on Multiple‐Input‐Multiple‐Output nonlinear mechanical vibrating systems. Analytical and numerical results prove the effectiveness and efficiency of the proposed on‐line algebraic parametric identification approach. 相似文献
89.
Bradford John P. Tucker Bernabe Hernandez-Moreno Gerardo Charles Phillip Thomas Vinoy 《Journal of Materials Science》2021,56(26):14717-14728
Journal of Materials Science - For bone tissue engineering, additive manufacturing offers promise in the development of biomimetic scaffolds; however, common polymers used in typical 3D printing... 相似文献
90.
D. Salomoni I. Campos L. Gaido J. Marco de Lucas P. Solagna J. Gomes L. Matyska P. Fuhrman M. Hardt G. Donvito L. Dutka M. Plociennik R. Barbera I. Blanquer A. Ceccanti E. Cetinic M. David C. Duma A. López-García G. Moltó P. Orviz Z. Sustr M. Viljoen F. Aguilar L. Alves M. Antonacci L. A. Antonelli S. Bagnasco A. M. J. J. Bonvin R. Bruno Y. Chen A. Costa D. Davidovic B. Ertl M. Fargetta S. Fiore S. Gallozzi Z. Kurkcuoglu L. Lloret J. Martins A. Nuzzo P. Nassisi C. Palazzo J. Pina E. Sciacca D. Spiga M. Tangaro M. Urbaniak S. Vallero B. Wegh V. Zaccolo F. Zambelli T. Zok 《Journal of Grid Computing》2018,16(3):381-408
This paper describes the achievements of the H2020 project INDIGO-DataCloud. The project has provided e-infrastructures with tools, applications and cloud framework enhancements to manage the demanding requirements of scientific communities, either locally or through enhanced interfaces. The middleware developed allows to federate hybrid resources, to easily write, port and run scientific applications to the cloud. In particular, we have extended existing PaaS (Platform as a Service) solutions, allowing public and private e-infrastructures, including those provided by EGI, EUDAT, and Helix Nebula, to integrate their existing services and make them available through AAI services compliant with GEANT interfederation policies, thus guaranteeing transparency and trust in the provisioning of such services. Our middleware facilitates the execution of applications using containers on Cloud and Grid based infrastructures, as well as on HPC clusters. Our developments are freely downloadable as open source components, and are already being integrated into many scientific applications. 相似文献