Results 41 to 50 of about 199 (165)

Leaching kinetics of gold mine tailings: the removal of manganese and iron by sodium carbonate [PDF]

E3S Web of Conferences, 2019
South Africa is a mineral-rich country with numerous metals and minerals such as gold, copper, and platinum group metals which are exploited to a significant extent.
Mashifana Tebogo, Sithole Nastassia
doaj   +1 more source

Flexoelectricity in Photoconversion: Fundamentals, Materials, and Outlooks

Advanced Science, EarlyView.
Mechanical bending of a flexible cantilever induces a strain gradient in the photoactive material. The resulting flexoelectric field couples with photovoltaic and photoconductive effects, modulating charge generation, separation, and collection. A comparative analysis of oxide perovskites, halide perovskites, and two‐dimensional materials is presented,
Xiang Huang, Feng Li, Rongkun Zheng
wiley   +1 more source

PGM MINERALS FROM PLACER OF THE MURZINKA-ADUI GRANITE GNEISSIC COMPLEX AND THEIR POSSIBLE SOURCES [PDF]

Минералогия, 2015
The paper presents the results of study of PGM minerals found in a small placer of the MurzinkaAdui granite gneissic block, Central Urals. We studied 65 PGM grains 0.1–0.8 mm in size including 42, 21, and 2 grains of the Os-Ir-Ru (±Pt, Rh) and Pt-Fe (±Ir,
V.V. Murzin, A.Yu. Kissin, D.A. Varlamov
doaj  

Regulating Cells Fate and Function to Facilitate Bone Regeneration via Designing Programmable Bio‐Interactive Materials

Advanced Science, EarlyView.
This article aims to elucidate the biological mechanisms of bone repair and the evolution of material design, highlighting key cellular and molecular processes. It further proposes strategies and prospects for programmable bio‐interactive materials, which enable precisely guided bone tissue regeneration by dynamically regulating cell behavior and the ...
Qingrui Fan, Fuming Cao, Junqiang Mao, Pengbin Yin, Licheng Zhang, Jianjun Wang, Peifu Tang   +6 more
wiley   +1 more source

Retrospective Grid Cells in the Medial Entorhinal Cortex Encode Past Paths During Spatial Navigation

Advanced Science, EarlyView.
Retrospective grid cells are identified in the medial entorhinal cortex, with spatial firing patterns that become most grid‐like when activity is projected onto recently traversed locations. Their coding loses spatial precision in darkness and is disrupted during assisted movement, indicating that entorhinal representations incorporate recent path ...
Ruojin Liu, Xin Yuan, Zilong He, Hong Jin, Jiayi Tian, Cong Chen, Yuanjing Liu, Xiang Zhang, Shidan Wen, Emilio Kropff, Chenglin Miao   +10 more
wiley   +1 more source

Bioenergetic Materials for Tissue Regeneration: Modulating Metabolism to Promote Cellular Anabolism

Advanced Science, EarlyView.
Bioenergetic materials (BEMs) modulate cellular metabolism to promote tissue regeneration. Their principal mechanisms of action include metabolic substrate supplementation, metabolic enzyme modulation, organelle transfer, electrical current regulation, redox homeostasis modulation, and oxygen tension modulation.
Yuchen He, Yuwen Wang, Jonathan F. Gong, Yiting Lei, Fei Jin, Weihong Zhu, Rocky S. Tuan, Zhong Alan Li   +7 more
wiley   +1 more source

Engineering Polar Nanoregions in COFs via Controlled Symmetry Breaking Toward Piezocatalysis

Angewandte Chemie, EarlyView.
Polar nanoregions (PNRs) are engineered within covalent organic frameworks via asymmetric grafting of highly polar polyfluoroalkyl chains, which enables controlled symmetry breaking. These randomly oriented artificial PNRs dynamically respond to mechanical stimuli and impart relaxation behavior to the COFs (TFB‐TAPT‐FA).
Ge Yan, Yixuan Wang, Xiaodong Sun, Liberty L. Mguni, Shuai Zhang, Shiyuan Liu, Xue Zhou, Lingfeng Zhu, Yali Yao, Hongwei Huang, Liqun Ye, Xinyi Yang, Bo Zou, Tianyi Ma   +13 more
wiley   +2 more sources

An ATP7A‐Mediated Endogenous Regulation Bio‐Clay Enzyme Enables Self‐Amplified Copper Accumulation for Immunogenic Pyrop

Advanced Science, EarlyView.
A self‐amplifying bio‐clay nanozyme (Bio‐Clayzyme) disrupts tumor metabolic homeostasis through endogenous copper transporter ATPase (ATP7A) downregulation, enhancing cascade catalysis and triggering immunogenic pyroptosis for effective tumor immunotherapy.
Weimin Xie, Yan Li, Guangyao Li, Ying Chen, Huaming Yang   +4 more
wiley   +1 more source

Self‐Assembled Pt(II) Complexes Boost Up Stem Cell Proliferation and Accelerate Metamorphosis in Living Organisms

Angewandte Chemie, EarlyView.
Pt1, an organometallic platinum‐based complex, act as a modulator of redox homeostasis in cnidarians, regulating cellular functions and life‐cycle dynamics. In Nematostella vectensis, it mitigates oxidative stress, strengthens detox systems and accelerates development.
Giuseppina Tommasini, Tania Pecoraro, Anna Lewinska, Maciej Wnuk, Olga Kolodziej, Daniela Intartaglia, Simona Morgera, Alessandro Aliprandi, Giulia Veronesi, Giorgio Facchetti, Isabella Rimoldi, Angela Tino, Claudia Tortiglione, Luisa De Cola   +13 more
wiley   +2 more sources

COMPARISON OF PLATINUM GROUP MINERALS FROM ELUVIAL-DELUVIAL PLACER OF THE SVETLY BOR CLYNOPIROXENITE-DUNITE MASSIF (CENTRAL URALS) [PDF]

Минералогия, 2017
Morphology and composition of platinum group minerals (PGMs) from loose sediments of eluvial-deluvial placer of the Svetly Bor clinopyroxenite-dunite massif are studied.
R.S. Palamarchuk, S.Yu. Stepanov, D.A. Khanin, A.V. Antonov, A.A. Zolotarev   +4 more
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