Results 41 to 50 of about 6,794,876 (284)

A multi-layer bioinspired design with evolution of shish-kebab structures induced by controlled periodical shear field

open access: yeseXPRESS Polymer Letters, 2013
The crystallization of polymers, caused by flow fields in the melt, has been the subject of extensive studies for many years. In this study, we use periodical shear to induce polypropylene to form multi-layer structure, which is usually observed in ...
J. Zhang   +6 more
doaj   +1 more source

Flow-induced crystallization of a polyethylene liquid above the melting temperature and its nonequilibrium phase diagram

open access: yesPhysical Review Research, 2020
Manufacturing of plastics is typically performed via flow processing of a polymer melt. Semicrystalline polymers, such as polyethylene (PE), play a critical role in the global plastics markets, but fundamental understanding of how process flow conditions
Mohammad H. Nafar Sefiddashti   +2 more
doaj   +1 more source

Luminescent biodegradable polycaprolactone materials prepared by blending with bio-based hyperbranched polymers

open access: yeseXPRESS Polymer Letters, 2022
It is the pursuit to give biodegradable polycaprolactone (PCL) luminescence properties while maintaining its biocompatibility in a feasible way. For this purpose, bio-based luminescent furan-terminated hyperbranched polymers (HBPFs) have been synthesized,
Si Qi Huang   +3 more
doaj   +1 more source

Fiber-Induced Crystallization in Elongational Flows

open access: yesMacromolecules
Morphology development at the fiber/matrix interphase in fiber-reinforced isotactic polypropylene composites is a widely studied topic. While the application of shear flow may strongly enhance the nucleation density around the fiber, little is known about the influence of fibers on the crystallization of polypropylene subjected to an extensional flow ...
van Heugten, Paul M.H.   +5 more
openaire   +2 more sources

Engineering peptides into antibodies—opportunities and strategies for therapeutic innovation

open access: yesFEBS Letters, EarlyView.
Peptides and antibodies occupy complementary therapeutic niches. Peptides recognize difficult targets in a compact format, while antibodies add specificity, long half‐life, and effector functions. This review examines strategies that merge both modalities—peptide grafting into loops, terminal and Fc fusions, and bioconjugation—highlighting how ...
Jinling Wang   +2 more
wiley   +1 more source

Structural and biochemical analysis of a B12 superbinder

open access: yesFEBS Letters, EarlyView.
BtuG proteins are vitamin B12 scavengers in Bacteroides thetaiotaomicron, a dominant human gut bacterium. We present crystal structures of three BtuG homologs bound to cobalamin and its precursor cobinamide, revealing picomolar binding affinities, among the highest known for any natural protein.
Jose M. Martinez Felices   +3 more
wiley   +1 more source

Crystallization by acoustic and hydrodynamic cavitation: Mechanisms and process scalability

open access: yesUltrasonics Sonochemistry
Research on crystallization processes induced by alternative technologies such as acoustic and hydrodynamic cavitation has been gaining popularity over the past few decades.
Vitoria H. Cauduro   +5 more
doaj   +1 more source

Eruption of ultralow-viscosity basanite magma at Cumbre Vieja, La Palma, Canary Islands

open access: yesNature Communications, 2022
The viscosity of magma exerts control on all aspects of its migration through the crust to eruption. This was particularly true for the 2021 eruption of Cumbre Vieja (La Palma), which produced exceptionally fast and fluid lava at high discharge rates. We
Jonathan M. Castro, Yves Feisel
doaj   +1 more source

Superplastic Forming of Zr-Based Bulk Metallic Glasses

open access: yesMetals, 2023
In this paper, the partially crystallized Zr70Cu13.5Ni8.5Al8 bulk metallic glasses (BMGs) were prepared, and their superplastic deformation ability in the supercooled liquid region was studied via compression over a wide range of strain rates from 5 × 10−
Xiangyun Zhang   +4 more
doaj   +1 more source

The Shewanella oneidensis Fic enzyme SoFic targets the switch‐I region of EF‐Tu for AMPylation

open access: yesFEBS Letters, EarlyView.
Fic enzymes mediate diverse post‐translational modifications across all domains of life, including AMPylation. Prokaryotic EF‐Tu can be AMPylated and deAMPylated by the conserved Fic enzyme SoFic. Structural and biochemical approaches were used to characterize the effect of AMPylation on EF‐Tu, SoFic's enzymatic activities, and the enzyme‐target ...
Svenja Runge   +6 more
wiley   +1 more source

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