Results 101 to 110 of about 151,077 (328)

INFLUENCE OF THE SIZE OF METHYLENE SPACERS ON THE THERMAL BEHAVIOR OF SEVERAL ALIPHATIC-AROMATIC POLYESTERS

Scientific Study & Research: Chemistry & Chemical Engineering, Biotechnology, Food Industry, 2014
Polyesters have a wide range of technical applications and therefore their processing is of the utmost importance. Since polyesters are usually processed by melting, their thermal stability is an extremely important characteristic for the exact ...
NATALIA HURDUC, GABRIELA LISA, VIOLETA TOADER   +2 more
doaj  

Screening and Characterization of Novel Polyesterases from Environmental Metagenomes with High Hydrolytic Activity against Synthetic Polyesters.

Environmental Science and Technology, 2018
The continuous growth of global plastics production, including polyesters, has resulted in increasing plastic pollution and subsequent negative environmental impacts.
M. Hajighasemi, A. Tchigvintsev, B. Nocek, R. Flick, Ana L. Popovic, T. Hai, A. Khusnutdinova, Greg Brown, Xiaohui Xu, Hong Cui, Julia Anstett, T. Chernikova, T. Brüls, D. Le Paslier, M. Yakimov, A. Joachimiak, O. Golyshina, A. Savchenko, P. Golyshin, E. Edwards, A. Yakunin   +20 more
semanticscholar   +1 more source

Dual‐Functional Polyphosphoesters for Gene Delivery: Synergistic Effects of Guanidinium and Hydrophobic Side Chains in Degradable Polymers

Advanced Healthcare Materials, EarlyView.
This study presents guanidinium‐ and indole‐functionalized polyphosphoesters as degradable, non‐viral gene delivery vectors. Through precise tuning of charge density and hydrophobicity, these polymers form stable polyplexes with low toxicity. Remarkably, minor structural changes yield up to 200‐fold differences in transfection efficiency, highlighting ...
Markus Kötzsche, Andreas Dzierza, Jan Egger, Timo Rheinberger, Christin Weilandt, Frederik R. Wurm, Ivo Nischang, Dagmar Fischer, Kalina Peneva   +8 more
wiley   +1 more source

The Lewis Pair Polymerization of Lactones Using Metal Halides and N-Heterocyclic Olefins: Theoretical Insights

Molecules, 2018
Lewis pair polymerization employing N-Heterocyclic olefins (NHOs) and simple metal halides as co-catalysts has emerged as a useful tool to polymerize diverse lactones. To elucidate some of the mechanistic aspects that remain unclear to date and to better
Jan Meisner, Johannes Karwounopoulos, Patrick Walther, Johannes Kästner, Stefan Naumann   +4 more
doaj   +1 more source

Flame resistant elastic elastomeric fibers [PDF]

, 1972
Development of materials to improve flame resistance of elastic elastomeric fibers is discussed. Two approaches, synthesis of polyether based urethanes and modification of synthesized urethanes with flame ratardant additives, are described.
Howarth, J. T., Massucco, A. A.
core   +1 more source

Block copolymers of poly(L-lactide) and poly(ε-caprolactone) or poly(ethylene glycol) prepared by reactive extrusion [PDF]

, 1996
Blends of poly(L-lactide) (PLLA) and poly(-caprolactone) (PCL) were prepared in a co-rotating twin screw miniextruder (40 rpm, 200°). It was attempted to prepare multiblock copolymers by allowing a controlled number of transesterification reactions ...
Bernard, A., Dijkstra, P.J., Feijen, J., Stevels, W.M., Witte, P. van de   +4 more
core   +3 more sources

Unraveling substituent effects on the glass transition temperatures of biorenewable polyesters

Nature Communications, 2018
Converting biomass-based feedstocks into polymers not only reduces our reliance on fossil fuels, but also furnishes multiple opportunities to design biorenewable polymers with targeted properties and functionalities. Here we report a series of high glass
Xiaopeng Yu, J. Jia, Shu Xu, K. Lao, Maria J. Sanford, R. Ramakrishnan, S. Nazarenko, T. Hoye, G. Coates, R. DiStasio   +9 more
semanticscholar   +1 more source

Bacteria‐Responsive Nanostructured Drug Delivery Systems for Targeted Antimicrobial Therapy

Advanced Materials, EarlyView.
Bacteria‐responsive nanocarriers are designed to release antimicrobials only in the presence of infection‐specific cues. This selective activation ensures drug release precisely at the site of infection, avoiding premature or indiscriminate release, and enhancing efficacy.
Guillermo Landa, Gracia Mendoza, Silvia Irusta, Manuel Arruebo   +3 more
wiley   +1 more source

Producing Polycaprolactone and Basil Seed Gum Nanofibers Using an Electrospinning Process [PDF]

Journal of Food Quality and Hazards Control
Background: Novel packaging materials often exhibit enhanced environmental sustainability, safety, and biodegradability compared to conventional plastics.
N. Zamani, A. Farsad-Naeimi, E. Sharifi, V. Ghasemzadeh-Mohammadi   +3 more
doaj  

Sculpting the Future of Bone: The Evolution of Absorbable Materials in Orthopedics

Advanced Materials, EarlyView.
This review summarizes the current status of polymeric, ceramic, and metallic absorbable materials in orthopedic applications, and highlights several innovative strategies designed to enhance mechanical performance, control degradation, and promote bioactivity. We also discuss the progress and translational potential of absorbable materials in treating
Zhao Wang, Zehui Lv, Xuejie Cai, Yingjie Wang, Bo Peng, Haojing Xu, Hualuo Pang, Xingdong Yang, Jiawei Xu, Yixin Bian, Bin Feng, Peng Wen, Yufeng Zheng, Xisheng Weng   +13 more
wiley   +1 more source