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"Diaz, David"
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Diego : bigger than life
The life and work of the artist Diego Rivera is told through chronological poems that capture salient points in his life.
BOOK
Antimicrobial and Hemolytic Studies of a Series of Polycations Bearing Quaternary Ammonium Moieties: Structural and Topological Effects
A series of polycations bearing quaternary ammonium moieties have shown antimicrobial activity against the Gram-negative bacterium Escherichia coli. Different polymer topologies governed by a disubstituted aromatic core as well as different diamine-based linkers were found to influence the antimicrobial properties. Moreover, the hemolytic activity against human red blood cells was measured and demonstrated good biocompatibility and selectivity of these polycations for bacteria over mammalian cells.
Journal Article
Smoky night
When the Los Angeles riots break out in the streets of their neighborhood, a young boy and his mother learn the values of getting along with others no matter what their background or nationality.
Book
3D Printed Polymeric Hydrogels for Nerve Regeneration
The human nervous system lacks an inherent ability to regenerate its components upon damage or diseased conditions. During the last decade, this has motivated the development of a number of strategies for nerve regeneration. However, most of those approaches have not been used in clinical applications till today. For instance, although biomaterial-based scaffolds have been extensively used for nerve reparation, the lack of more customized structures have hampered their use in vivo. This highlight focuses mainly on how 3D bioprinting technology, using polymeric hydrogels as bio-inks, can be used for the development of new nerve guidance channels or devices for peripheral nerve cell regeneration. In this concise contribution, some of the most recent and representative examples are highlighted to discuss the challenges involved in various aspects of 3D bioprinting for nerve cell regeneration, specifically when using polymeric hydrogels.
Journal Article
Picasso : I the king = Yo el rey
\"Pablo Picasso's relationships with both his children and his female companions were often tempestuous and destructive, but they provided the drama on which he fed as he created one groundbreaking work after another. From ceramics to print making to sculpture to photography to poetry, Picasso had a huge appetite for expressing himself through every kind of artistic medium, and he is now considered one of the greatest artists of the 20th century. With bold, powerful oil paintings, David Diaz captures the intensity of a man who once signed a drawing as \"Yo el rey\" or \"I the King.\" Besides beautifully crafted free-verse poems on Picasso's life, there is a back section that includes a glossary, a chronology, sources, notes, and a biographical essa essay.\"--Provided by publisher.
BOOK
Dipolar Glass Polymers Containing Polarizable Groups as Dielectric Materials for Energy Storage Applications. A Minireview
Materials that have high dielectric constants, high energy densities and minimum dielectric losses are highly desirable for use in capacitor devices. In this sense, polymers and polymer blends have several advantages over inorganic and composite materials, such as their flexibilities, high breakdown strengths, and low dielectric losses. Moreover, the dielectric performance of a polymer depends strongly on its electronic, atomic, dipolar, ionic, and interfacial polarizations. For these reasons, chemical modification and the introduction of specific functional groups (e.g., F, CN and R−S(=O)2−R´) would improve the dielectric properties, e.g., by varying the dipolar polarization. These functional groups have been demonstrated to have large dipole moments. In this way, a high orientational polarization in the polymer can be achieved. However, the decrease in the polarization due to dielectric dissipation and the frequency dependency of the polarization are challenging tasks to date. Polymers with high glass transition temperatures (Tg) that contain permanent dipoles can help to reduce dielectric losses due to conduction phenomena related to ionic mechanisms. Additionally, sub-Tg transitions (e.g., γ and β relaxations) attributed to the free rotational motions of the dipolar entities would increase the polarization of the material, resulting in polymers with high dielectric constants and, hopefully, dielectric losses that are as low as possible. Thus, polymer materials with high glass transition temperatures and considerable contributions from the dipolar polarization mechanisms of sub-Tg transitions are known as “dipolar glass polymers”. Considering this, the main aspects of this combined strategy and the future prospects of these types of material were discussed.
Journal Article
You call that art?! : learn about modern sculpture and make your own, with more than 100 punch-out pieces
Two bestselling pop-up book authors provide an overview of sculpture from prehistory until the late 19th century, then give readers a look at several 20th-century artists who helped define modern sculpture. Includes die-cut pieces that can be assembled (and reassembled) in any way the reader chooses.
Book
Gadolinium(III)-Based Porous Luminescent Metal-Organic Frameworks for Bimodal Imaging
GdIII‐based metal–organic frameworks, Gd‐pDBI‐1 and Gd‐pDBI‐2, have been synthesized using the linker pDBI (pDBI=1,4‐bis(5‐carboxy‐1H‐benzimidazole‐2yl)benzene). They exhibited structural diversity due to subtle change in reaction constituents. Owing to the judicious choice of the fluorescent linker, the materials could be used for bimodal imaging (fluorescent and magnetic resonance) and displayed a modest T1 relaxivity value. Two for one: Two gadolinium(III)‐based fluorescent metal–organic frameworks, Gd‐pDBI‐1 and Gd‐pDBI‐2, have been synthesized using the fluorescent linker. These materials are suitable for simultaneous bimodal (fluorescence and magnetic resonance) imaging applications and postsynthetic modifications are not required (see figure).
Journal Article