Results 21 to 30 of about 131,598 (304)

Macromolecular structural dynamics visualized by pulsed dose control in 4D electron microscopy [PDF]

, 2011
Macromolecular conformation dynamics, which span a wide range of time scales, are fundamental to the understanding of properties and functions of their structures.
A. H. Zewail, Barwick, Dobson, Grassucci, Henderson, Kubelka, Kwon, Mao, Michalet, O.-H. Kwon, Onuchic, Park, Shaw, Siqueira, Tarascon, V. Ortalan, Zewail, Zewail, Zhang   +18 more
core   +2 more sources

Biodiesel Production from Palm Fatty Acids Distillate Using Tungstophosphoric Acid- and Cs-salt Immobilized-Silica

Walailak Journal of Science and Technology, 2012
H3PW12O40/SiO2 and Cs1.5H1.5PW12O40/SiO2 composites with controllable acid loadings (5 - 15 wt% loading) were prepared by direct co-condensation sol-gel methods in the presence of triblock poly(ethylene oxide)-poly(propylene oxide)-poly(ethylene oxide ...
Wimonrat TRAKARNPRUK
doaj   +1 more source

Correlation between Grafting Density and Confined Crystallization Behavior of Poly(ethylene glycol) Grafted to Silica [PDF]

, 2019
The interfacial interactions of polymer-nanoparticles have dramatical effects on the crystallization behavior of grafted polymers. In this study, methoxy polyethylene glycol (MPEG) (molecular weights 750, 2000 and 4000 g mol−1) was grafted onto amino ...
Müller Sánchez, Alejandro Jesús, Shui, Yudan, Su, Yunlan, Wang, Dujin, Wen, Xiangning, Zhao, Weiwei   +5 more
core   +3 more sources

Critical Size of Secondary Nuclei Determined via Nucleation Theorem Reveals Selective Nucleation in Three-Component Co-Crystals

Entropy, 2019
The critical size of the secondary nuclei plays an important role in determining the crystal growth rate. In the past, the Nucleation Theorem has been applied to determine the number of molecules in the critical nuclei of a single-component crystal via ...
Yang Gao, Baohua Guo, Jun Xu
doaj   +1 more source

Improvement of mechanical properties of chitosan film [PDF]

Journal on Processing and Energy in Agriculture, 2012
This paper investigates the intensity of the influence which poly (ethylene oxide) and poly(ethylene glycol) additions have on the mechanical and structural properties of chitosan films.
Krkić Nevena, Lazić Vera, Šuput Danijela   +2 more
doaj  

Preparation and characterization of cationic Pluronic for surface modification and functionalization of polymeric drug delivery nanoparticles

eXPRESS Polymer Letters, 2016
Biodegradable poly(lactic-co-glycolic acid) copolymer, PLGA nanoparticles (NPs) with a surface layer of poly (ethylene oxide)-poly(propylene oxide)-poly(ethylene oxide) triblock copolymers, Pluronics, are promising drug carrier systems.
G. Gyulai, A. Magyar, J. Rohonczy, J. Orosz, M. Yamasaki, Sz. Bosze, E. Kiss   +6 more
doaj   +1 more source

A novel diblock copolymer of (monomethoxy poly [ethylene glycol]-oleate) with a small hydrophobic fraction to make stable micelles/polymersomes for curcumin delivery to cancer cells [PDF]

, 2014
Curcumin is a potent natural anticancer agent, but its effectiveness is limited by properties such as very low solubility, high rate of degradation, and low rate of absorption of its hydrophobic molecules in vivo.
Erfani-Moghadam, V., Najafi, F., Nomani, A., Sadeghizadeh, M., Yazdani, Y., Zamani, M.   +5 more
core   +2 more sources

Hierarchical Self-Assembled Structures from Diblock Copolymer Mixtures by Competitive Hydrogen Bonding Strength

Molecules, 2018
In this work we prepared poly(styrene–b–vinylphenol) (PS-b-PVPh) by sequential anionic living polymerization and poly(ethylene oxide-b-4-vinylpyridine) (PEO-b-P4VP) by reversible addition fragmentation chain transfer polymerization (RAFT) by ...
Tzu-Chun Tseng, Shiao-Wei Kuo
doaj   +1 more source

Ciprofloxacin-Loaded Mixed Polymeric Micelles as Antibiofilm Agents

Pharmaceutics, 2023
In this work, mixed polymeric micelles (MPMs) based on a cationic poly(2-(dimethylamino)ethyl methacrylate)-b-poly(ε-caprolactone)-b-poly(2-(dimethylamino)ethyl methacrylate) (PDMAEMA29-b-PCL70-b-PDMAEMA29) and a non-ionic poly(ethylene oxide)–b-poly ...
Rumena Stancheva, Tsvetelina Paunova-Krasteva, Tanya Topouzova-Hristova, Stoyanka Stoitsova, Petar Petrov, Emi Haladjova   +5 more
doaj   +1 more source

Electrical Re-Writable Non-Volatile Memory Device based on PEDOT:PSS Thin Film [PDF]

, 2020
open access articleIn this research, we investigate the memory behavior of poly(3,4 ethylenedioxythiophene) polystyrene sulfonate (PEDOT:PSS) cross bar structure memory cells.
Pantelidis, Christos Christodoulos, Salaoru, Iulia   +1 more
core   +1 more source