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188 Aktuelle Fachpublikationen zum Thema Addition

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Exploiting Oligo(amido amine) Backbones for the Multivalent Presentation of Coiled-Coil Peptides

16.07.2015 | Ulla I. M. Gerling-Driessen; Nina Mujkic-Ninnemann; Daniela Ponader; Daniel Schöne; Laura Hartmann; Beate Koksch; U. ..., Biomacromolecules, 2015

The investigation of coiled coil formation for one mono- and two divalent peptide–polymer conjugates is presented. Through the assembly of the full conjugates on solid support, monodisperse sequence-defined conjugates are obtained with defined positions and distances between the peptide side ...


Photodegradable Gelatin-Based Hydrogels Prepared by Bioorthogonal Click Chemistry for Cell Encapsulation and Release

24.06.2015 | Vinh X. Truong; Kelly M. Tsang; George P. Simon; Richard L. Boyd; Richard A. Evans; Helmut Thissen; John S. Forsythe, Biomacromolecules, 2015

In this study, we present a method for the fabrication of in situ forming gelatin and poly(ethylene glycol)-based hydrogels utilizing bioorthogonal, strain-promoted alkyne–azide cycloaddition as the cross-linking reaction. By incorporating nitrobenzyl moieties within the network structure, these ...


Alkaline Phosphatase-Mimicking Peptide Nanofibers for Osteogenic Differentiation

16.06.2015 | Gulcihan Gulseren; I. Ceren Yasa; Oya Ustahuseyin; E. Deniz Tekin; Ayse B. Tekinay; Mustafa O. Guler, Biomacromolecules, 2015

Recognition of molecules and regulation of extracellular matrix synthesis are some of the functions of enzymes in addition to their catalytic activity. While a diverse array of enzyme-like materials have been developed, these efforts have largely been confined to the imitation of the chemical ...


Functional Degradable Polymers by Radical Ring-Opening Copolymerization of MDO and Vinyl Bromobutanoate: Synthesis, Degradability and Post-Polymerization Modification

09.06.2015 | Guillaume G. Hedir; Craig A. Bell; Rachel K. O’Reilly; Andrew P. Dove, Biomacromolecules, 2015

The synthesis of vinyl bromobutanoate (VBr), a new vinyl acetate monomer derivative obtained by the palladium-catalyzed vinyl exchange reaction between vinyl acetate (VAc) and 4-bromobutyric acid is reported. The homopolymerization of this new monomer using the RAFT/MADIX polymerization technique ...


Versatile Synthesis of Stable, Functional Polypeptides via Reaction with Epoxides

26.05.2015 | Eric G. Gharakhanian; Timothy J. Deming, Biomacromolecules, 2015

Methodology was developed for efficient alkylation of methionine residues using epoxides as a general strategy to introduce a wide range of functional groups onto polypeptides. Use of a spacer between epoxide and functional groups further allowed addition of sterically demanding functionalities. ...


Antibiotic Activity of Iron-Sequestering Polymers

22.04.2015 | Nashwa El-Gendy; Jian Qian; Kate Eshelman; Mario Rivera; Cory Berkland, Biomacromolecules, 2015

Increasing antibiotic resistance has compelled the development of novel antibiotics and adjuvant therapies that enhance the efficacy of existing antibiotics. Iron plays a critical role in bacterial infections, yet the use of iron chelators as adjuvant therapy with antibiotics has yielded highly ...


Exploring the Nature of Cellulose Microfibrils

30.03.2015 | Ying Su; Christian Burger; Hongyang Ma; Benjamin Chu; Benjamin S. Hsiao, Biomacromolecules, 2015

Ultrathin cellulose microfibril fractions were extracted from spruce wood powder using combined delignification, TEMPO-catalyzed oxidation, and sonication processes. Small-angle X-ray scattering of these microfibril fractions in a “dilute” aqueous suspension (concentration 0.077 wt %) revealed ...


Multicolor Fluorescent Labeling of Cellulose Nanofibrils by Click Chemistry

27.03.2015 | Julien R. G. Navarro; Guillaume Conzatti; Yang Yu; Andreas B. Fall; Renny Mathew; Mattias Edén; Lennart Bergström, Biomacromolecules, 2015

We have chemically modified cellulose nanofibrils (CNF) with furan and maleimide groups, and selectively labeled the modified CNF with fluorescent probes; 7-mercapto-4-methylcoumarin and fluorescein diacetate 5-maleimide, through two specific click chemistry reactions: Diels–Alder cycloaddition ...


Biocompatible Hydrogel Nanocomposite with Covalently Embedded Silver Nanoparticles

26.03.2015 | Clara García-Astrain; Cheng Chen; María Burón; Teodoro Palomares; Arantxa Eceiza; Ljiljana Fruk; M. Ángeles Corcuera ..., Biomacromolecules, 2015

Bionanocomposite materials, combining the properties of biopolymers and nanostructured materials, are attracting interest of the wider scientific community due to their potential application in design of implants, drug delivery systems, and tissue design platforms. Herein, we report on the use of ...


Exploring the Kinetics of Gelation and Final Architecture of Enzymatically Cross-Linked Chitosan/Gelatin Gels

26.03.2015 | Marcelo A. da Silva; Franziska Bode; Isabelle Grillo; Cécile A. Dreiss, Biomacromolecules, 2015

Small-angle neutron scattering (SANS) was used to characterize the nanoscale structure of enzymatically cross-linked chitosan/gelatin hydrogels obtained from two protocols: a pure chemical cross-linking process (C), which uses the natural enzyme microbial transglutaminase, and a ...


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