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170 Aktuelle Fachpublikationen zum Thema Addition

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Influence of Amino Acids, Buffers, and pH on the γ-Irradiation-Induced Degradation of Alginates

20.11.2014 | Ann-Sissel T. Ulset; Hideki Mori; Marianne Ø. Dalheim; Masayuki Hara; Bjørn E. Christensen, Biomacromolecules, 2014

Alginate-based biomaterials and medical devices are commonly subjected to γ-irradiation as a means of sterilization, either in the dry state or the gel (hydrated) state. In this process the alginate chains degrade randomly in a dose-dependent manner, altering alginates’ material properties. The ...


“Green” Synthesis of Unnatural Poly(Amino Acid)s with Zwitterionic Character and pH-Responsive Solution Behavior, Mediated by Linear–Dendritic Laccase Complexes

28.10.2014 | Ivan Gitsov; Lili Wang; Nikolay Vladimirov; Arsen Simonyan; David J. Kiemle; Andri Schutz, Biomacromolecules, 2014

This article describes the enzyme-catalyzed “green” synthesis of an unnatural poly(amino acid). dl-Tyrosine was polymerized under environmentally friendly conditions using linear–dendritic laccase complexes as initiators and water as solvent. The influence of the dendron generation in the ...


Poly(ε-caprolactone) Nanowebs Functionalized with α- and γ-Cyclodextrins

23.10.2014 | Ganesh Narayanan; Bhupender S. Gupta; Alan E. Tonelli, Biomacromolecules, 2014

The effects of alpha- and gamma-cyclodextrins (α- and γ-CDs) on the thermal and crystal nucleation behavior of electrospun poly(ε-caprolactone) (PCL) nanofibers have been investigated. PCL/CD composite nanofibers were obtained for the first time by electrospinning the mixture from ...


Thermoresponsive Nanostructured Surfaces Generated by the Langmuir–Schaefer Method Are Suitable for Cell Sheet Fabrication

21.10.2014 | Morito Sakuma; Yoshikazu Kumashiro; Masamichi Nakayama; Nobuyuki Tanaka; Kazuo Umemura; Masayuki Yamato; Teruo Okano, Biomacromolecules, 2014

Thermoresponsive poly(N-isopropylacrylamide) (PIPAAm)-immobilized surfaces for controlling cell adhesion and detachment were fabricated by the Langmuir–Schaefer method. Block copolymers composed of polystyrene and PIPAAm (St-IPAAms) having various chain lengths and compositions were synthesized ...


Polyion Complex Micelle Based on Albumin–Polymer Conjugates: Multifunctional Oligonucleotide Transfection Vectors for Anticancer Chemotherapeutics

16.10.2014 | Yanyan Jiang; Hongxu Lu; Yee Yee Khine; Aydan Dag; Martina H. Stenzel, Biomacromolecules, 2014

Novel biocompatible polyion complex micelles, containing bovine serum albumin (BSA), polymer, and oligonucleotide, were synthesized as a generation of vectors for the gene transfection. Maleimide-terminated poly((N,N-dimethyl amino) ethyl methacrylate) (PDMAEMA) was prepared via reversible ...


Analysis of G-Block Distributions and Their Impact on Gel Properties of in Vitro Epimerized Mannuronan

03.09.2013 | Olav Aarstad; Berit Løkensgard Strand; Lise Mari Klepp-Andersen; Gudmund Skjåk-Bræk, Biomacromolecules, 2013

This paper reports a study of the distribution and function of homopolymeric guluronic acid blocks (G-blocks) in enzymatically modified alginate. High molecular weight mannuronan was incubated with one native (AlgE6) and two engineered G-block generating mannuronan C-5 epimerases (AlgE64 and ...


Location of the Bacteriophage P22 Coat Protein C-Terminus Provides Opportunities for the Design of Capsid-Based Materials

27.08.2013 | Amy Servid; Paul Jordan; Alison O’Neil; Peter Prevelige; Trevor Douglas, Biomacromolecules, 2013

Rational design of modifications to the interior and exterior surfaces of virus-like particles (VLPs) for future therapeutic and materials applications is based on structural information about the capsid. Existing cryo-electron microscopy-based models suggest that the C-terminus of the ...


Terminal-Functionality Effect of Poly(N-isopropylacrylamide) Brush Surfaces on Temperature-Controlled Cell Adhesion/Detachment

23.08.2013 | Naoki Matsuzaka; Masamichi Nakayama; Hironobu Takahashi; Masayuki Yamato; Akihiko Kikuchi; Teruo Okano, Biomacromolecules, 2013

Terminally functionalized poly(N-isopropylacrylamide) (PIPAAm) brush grafted glass surfaces were prepared by a surface-initiated reversible addition-fragmentation chain transfer radical (SI-RAFT) polymerization. SI-RAFT mediated PIPAAm chains possessed terminal dodecyl trithiocarbonate groups ...


Stealth Polymeric Vesicles via Metal-Free Click Coupling

21.08.2013 | Michael J. Isaacman; Eleonora M. Corigliano; Luke S. Theogarajan, Biomacromolecules, 2013

The strain-promoted azide–alkyne cycloaddition represents an optimal metal-free method for the modular coupling of amphiphilic polymer blocks. Hydrophilic poly(oxazoline) (PMOXA) or poly(ethylene glycol) (PEG) A-blocks were coupled with a hydrophobic poly(siloxane) B-block to provide triblock ...


3D Culture of Adipose-Tissue-Derived Stem Cells Mainly Leads to Chondrogenesis in Poly(ethylene glycol)-Poly(l-alanine) Diblock Copolymer Thermogel

19.08.2013 | Bora Yeon; Min Hee Park; Hyo Jung Moon; Seung-Jin Kim; Young Woo Cheon; Byeongmoon Jeong, Biomacromolecules, 2013

Poly(ethylene glycol)-b-poly(l-alanine) (PEG-L-PA)s with L-PA molecular weights of 620, 1100, and 2480 Da and a fixed molecular weight of PEG at 5000 Da were synthesized to compare the thermosensitive behavior, and to investigate their potential as a three-dimensional (3D) culture matrix of ...


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