Results 81 to 90 of about 177,844 (287)

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

Hydrogelation via Supramolecular Copolymerization of Structural Water within Adaptive Metal–Organic Fibers

Advanced Materials, EarlyView.
Structural water is harnessed as an active co‐monomer to drive supramolecular polymerization in bulk water. Zinc(II) Salphen complexes confine water molecules to form hollow, metal–organic nanofibers that assemble into adaptive hydrogels with thermoresponsive mechanics and selective chiral recognition.
Merlin R. Stühler, Hesam Makki, Tarek Hilal, Debsena Chakraboty, Mathias Dimde, Kai Ludwig, Rainer Haag, Sabine Rosenfeldt, Dorothee Silbernagl, Andreas Schäfer, Alex J. Plajer   +10 more
wiley   +1 more source

Degradable Donor‐Acceptor Polymeric Mixed Ionic‐Electronic Conductors for Transient Electronics

Advanced Materials Technologies, EarlyView.
Here, we report degradable donor–acceptor (D–A) polymeric mixed ionic‐electronic conductors for transient electronics. We take a systematic side chain engineering approach to elucidate how molecular‐level modifications of donor–acceptor (D–A) polymer structures can satisfy demands that are often conflicting: degradability, charge carrier transport, and
Angela Lin, Zhichang Liu, Saroj Upreti, Stanley Lo, Nathan Sung Yuan Hsu, Xiaodan Gu, Sihong Wang, Helen Tran   +7 more
wiley   +1 more source

Hydrogenative Depolymerization of End‐of‐Life Polycarbonates by an Iron Pincer Complex

ChemistryOpen, 2020
Chemical recycling processes can contribute to a resource‐efficient plastic economy. Herein, a procedure for the iron‐catalyzed hydrogenation of the carbonate function of end‐of‐life polycarbonates under simultaneous depolymerization is presented.
Christoph Alberti, Elena Fedorenko, Dr. Stephan Enthaler   +2 more
doaj   +1 more source

Direct Depolymerization Coupled to Liquid Extraction Surface Analysis-High-Resolution Mass Spectrometry for the Characterization of the Surface of Plant Tissues [PDF]

, 2019
The cuticle, the outermost layer covering the epidermis of most aerial organs of land plants, can have a heterogeneous composition even on the surface of the same organ.
Giorio, Chiara, Glover, Beverley J, Kalberer, Markus, Moyroud, Edwige   +3 more
core   +1 more source

Chronic Hypoxia Disrupts Spermatogenesis Through ASXL2–EZH2–Mediated Microtubule Destabilization

Advanced Science, EarlyView.
This study reveals the mechanism by which chronic hypoxia impairs spermatogenesis via the ASXL2–EZH2 axis, hindering the transition of spermatids from round to elongated forms. Key findings reveal that under hypoxic conditions, downregulated ASXL2 expression reduces EZH2 binding to the CEP162 promoter, leading to decreased H3K27me3 modification and ...
Jun Yin, Mengjie Zhang, Wenying Liu, Wenlong Shen, Debao Li, Hongming Miao, Fang Deng, Gang Zhang, Yi Tian, Yi Zhang, Zhihu Zhao, Bing Ni   +11 more
wiley   +1 more source

depolymerization

, 2014
Citation: 'depolymerization' in the IUPAC Compendium of Chemical Terminology, 3rd ed.; International Union of Pure and Applied Chemistry; 2006. Online version 3.0.1, 2019. 10.1351/goldbook.D01600 • License: The IUPAC Gold Book is licensed under Creative Commons Attribution-ShareAlike CC BY-SA 4.0 International for individual terms.
openaire   +1 more source

Redox Catalysis Facilitates Lignin Depolymerization [PDF]

ACS Central Science, 2017
Lignin is a recalcitrant and underexploited natural feedstock for aromatic commodity chemicals, and its degradation generally requires the use of high temperatures and harsh reaction conditions. Herein we present an ambient temperature one-pot process for the controlled oxidation and depolymerization of this potent resource. Harnessing the potential of
Irene Bosque, Gabriel Magallanes, Mathilde Rigoulet, Markus D. Kärkäs, Corey R. J. Stephenson   +4 more
openaire   +3 more sources

Effects of water and fluorine on the viscosity of albite melt at high pressure: a preliminary investigation [PDF]

, 1985
The viscosities of fluorine- and water-bearing melts based on albite composition have been determined at 7.5, 15 and 22.5 kbar by the falling-sphere method. All melt viscosities decrease isothermally with increasing pressure.
Arndt, Bartlett, Berman, Bjørn O. Mysen, Bottinga, Brown, Burnham, Christiansen, Clark, Compston, Dingwell, Donald B. Dingwell, Gill, Hazen, Huang, Jurewicz, Kogarko, Kushiro, Kushiro, Kushiro, Manning, Mysen, Mysen, Navrotsky, Piwinskii, Rabinovich, Rau, Riebling, Scarfe, Seifert, Shaw, Shaw, Shaw, Sleep, Spera, Stolper, Taylor, Turcotte, Tuttle, Vernon, Waff, White   +41 more
core   +1 more source

Cellular Snowballing: Cell Adhesion and Migration Drive the Self‐Assembly of Cell‐Microgel Biohybrid Spheroids

Advanced Science, EarlyView.
A new class of biohybrid spheroids is engineered through the self‐assembly of adherent cells and extracellular matrix‐mimetic hydrogel microparticles (microgels). By mimicking a snowballing effect, this approach enables scalable formation of porous, millimeter‐scale spheroids with enhanced cell viability and molecular diffusion.
Zaman Ataie, Sina Kheirabadi, Changhao Li, Aneesh Risbud, Aswathy Sebastian, Istvan Albert, Sulin Zhang, Amir Sheikhi   +7 more
wiley   +1 more source