La hidrogenación de los óxidos de carbono, especialmente CO, es un campo en el que se ha venido trabajando, extensivamente, desde comienzos del presente siglo. Clasificaciones sistemáticas que permiten elegir "a priori" el metal activo en estos procesos catalíticos han sido realizadas de un modo relativamente empírico. En la última década se ha...
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October 1, 2018 (v1)PublicationUploaded on: December 4, 2022
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April 4, 2018 (v1)Publication
The influence of chain length and ripening time on the self-assembly of tetradecyl C 14 , hexadecyl C 16 , and octadecylamine C 16 on mica has been studied by atomic force microscopy. The overall process can be described in three stages characterized by different time scales. First, alkylamine molecules adsorb in a process...
Uploaded on: December 4, 2022 -
November 17, 2017 (v1)Publication
To mimic nontoxic and fully biodegradable biopolymers like the plant cutin, polyester films from a natural occurring fatty polyhydroxyacid like aleuritic (9,10,16-trihydroxyhexadecanoic) acid have been prepared by noncatalyzed melt-polycondensation at moderate temperature (150°C) directly in air. The course of the reaction has been followed by...
Uploaded on: December 4, 2022 -
April 30, 2020 (v1)Publication
Metals used for food canning such as aluminum (Al), chromium-coated tin-free steel (TFS) and electrochemically tin-plated steel (ETP) were coated with a 2–3-µm-thick layer of polyaleuritate, the polyester resulting from the self-esterification of naturally-occurring 9,10,16-trihydroxyhexadecanoic (aleuritic) acid. The kinetic of the...
Uploaded on: December 4, 2022 -
April 17, 2018 (v1)Publication
Fatty polyhydroxyesters (C≥16) are present in nature as barrier polymers like cutin in some protective tissues of higher plants. The mimicry of these biopolymers is regarded as a strategy to design nontoxic and fully biodegradable food packaging films and coatings. To obtain cutin inspired materials we have used a natural occurring...
Uploaded on: March 27, 2023 -
March 6, 2018 (v1)Publication
We demonstrate that the microstructure and electrical properties of Ge 2Sb 2Te 5 films can be changed by a nanoscale mechanical process. Nanoscratching is used to define modified areas onto an as-deposited crystalline Ge 2Sb 2Te 5 film. Scanning tunneling microscopy measurements show that the modified areas have a very low electrical...
Uploaded on: March 27, 2023 -
April 4, 2018 (v1)Publication
Self-standing films of poly(ω-hydroxyl hexadecanoic acid) [poly(ω-OHC16)] have been prepared by noncatalyzed melt-polycondensation in air at 150, 175, and 200 °C. Poly(ω-OHC16)s obtained are characterized as polyesters by infrared spectroscopy (FT-IR) and solid state magic angle spinning 13C nuclear magnetic resonance (13C MAS-NMR)....
Uploaded on: December 5, 2022 -
December 5, 2022 (v1)Publication
Nowadays, natural polymer-based films are considered potentially environmentally friendly alternatives to conventional plastic films, due to many advantageous properties, including their easy processability, high flexibility, non-toxicity, low cost, high availability, and environmental safety. However, they are limited in their application by a...
Uploaded on: March 24, 2023 -
March 7, 2018 (v1)Publication
Isolated tomato fruit cuticles were subjected to low dose (80 Gy) γ-irradiation, as a potential methodology to prevent harvested fruit and vegetables spoilage. Both irradiated and non-irradiated samples have been morphologically and chemically characterized by scanning electron (SEM), atomic force (AFM), attenuated total reflectance Fourier...
Uploaded on: December 4, 2022 -
March 22, 2018 (v1)Publication
Free-standing polyesters films from mono and polyhydroxylated fatty acids (C16 and C18) have been obtained by non-catalyzed melt-condensation polymerization in air at 150°C. Chemical characterization by Fourier transform infrared spectroscopy and 13C Magic Angle Spinning Nuclear Magnetic Resonance (13C MAS–NMR) has confirmed the formation of...
Uploaded on: March 27, 2023 -
April 17, 2018 (v1)Publication
The cuticle is one of the most important plant barriers. It is an external and continuous lipid membrane that covers the surface of epidermal cells and whose main function is to prevent the massive loss of water. The spectroscopic characterization of the plant cuticle and its components (cutin, cutan, waxes, polysaccharides and phenolics) by...
Uploaded on: March 27, 2023