Results 91 to 100 of about 3,577,938 (260)

Photo‐Switchable Molecular Module Programming PET Biodegradation in Aquatic Environments

open access: yesAdvanced Functional Materials, EarlyView.
We address the plastic durability paradox by integrating an itaconic acid–derived pyrrolidone module into polymer backbones. Sunlight in water triggers Norrish Type I ring‐opening and hydrophilization, enabling rapid biodegradation into nontoxic minerals.
Mohammad Asif Ali   +16 more
wiley   +1 more source

Mineral resources of Thailand [PDF]

open access: yes, 2002
Volume 16 of the ESCAP Mineral Atlas series represents the continuation of the ESCAP secretariat’s work in the evaluation of the geological prospects, mineral resource potential and mineral development policy of ESCAP member countries.
UN.ESCAP   +1 more
core   +1 more source

Dispersants in Stirred Ball Mill Grinding

open access: yesKONA Powder and Particle Journal, 2014
The influence of chemical dispersants on the milling of dolomite was examined using a stirred ball mill. The effective degree of grinding was found to depend on the aggregation/dispersion state or the viscosity of ...
Yanmin Wang, Eric Forssberg
doaj   +1 more source

Enrichment Regularity of Indium in the Dulong Mineral Processing Plant, Yunnan Province, China

open access: yes
The Dulong deposit in Wenshan, southeastern Yunnan Province, is rich in zinc, tin, and copper resources, accompanied by rare metals such as indium and silver. It is a particularly important indium production base, with reserves of approximately 7000 tons,
Zhiming Lu   +7 more
core   +1 more source

Self‐Assembled Crystalline Peptoid Nanomaterials as Metal‐Free Enzyme Mimics for Enhanced Carbon Dioxide Hydration and Precipitation

open access: yesAdvanced Functional Materials, EarlyView.
Inspired by metal‐free carbonic anhydrases (CAs) that achieve efficient catalysis without metal cofactors, we herein report a sequence‐defined supramolecular peptoid platform that mimics metal‐free CAs and exhibits hydrolytic activity via a supramolecular assembly‐mediated proton‐transfer mechanism.
Progyateg Chakma   +8 more
wiley   +1 more source

Ultrafine Grinding in an Annular Ball Mill

open access: yesKONA Powder and Particle Journal, 2014
The influence of stirring speed, solids concentration, media density and size on grinding in a CoBall mill is described. The relationship between the product size and the process parameters was determined.
Osawaru A. Orumwense, Eric Forssberg
doaj   +1 more source

Charge‐Polarized Ni─S4 Single‐Atom Sites Drive Selective Photoreforming of Poly(lactic acid) to Lactate and Hydrogen

open access: yesAdvanced Functional Materials, EarlyView.
Atomically dispersed Ni–S4 sites on CdS nanorods induce interfacial charge polarization, directing photogenerated electrons to H2 evolution and holes to selective ester‐bond cleavage of poly(lactic acid). Without sacrificial reagents, this charge‐coupled system produces lactate while suppressing overoxidation, achieving an H2 evolution rate of 41.74 ...
Yu Yao   +8 more
wiley   +1 more source

Mechanics of Telson Ridges in Mantis Shrimp for Impact Analysis and Implications for Bioinspired Elastic Shell Designs

open access: yesAdvanced Functional Materials, EarlyView.
The mantis shrimp telson reveals how ridged biological shields control deformation under impact. Inspired by this architecture, telson‐inspired ridged curved shells transform ridge geometry and macroscopic curvature into bidirectional snap‐through, tunable stiffness, and enhanced hysteretic energy dissipation for multifunctional architected materials ...
Phani Saketh Dasika   +5 more
wiley   +1 more source

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