Results 81 to 90 of about 199 (165)

Chromite and platinum group elements mineralization in the Santa Elena Ultramafic Nappe (Costa Rica): geodynamic implications

Geologica Acta, 2011
Chromitites associated with strongly altered peridotite from six distinct localities in the Santa Elena ultramafic nappe (Costa Rica) have been investigated for the first time.
F. ZACCARINI, G. GARUTI, J.A. PROENZA FERNANDEZ, L. CAMPOS, O.A.R. THALHAMMER, T. AIGLSPERGER, J.F. LEWIS   +6 more
doaj  

Advances in Sustainable Production of Bio‐Derived 5‐Alkoxymethylfurfural and Levulinate Esters: A Comprehensive Review

Carbon Energy, EarlyView.
The present review discusses the advancement in the catalytic synthesis of 5‐alkoxymethylfurfural (AMF) and levulinate esters (LEs) from the aspects of catalytic systems, reaction mechanisms, product isolation, and techno‐economic analysis, supplying valuable insights toward future sustainable and efficient manufacture of AMF and LEs. ABSTRACT The huge
Jun Zhang, Chunxiang Yang, Yuhe Liao, Jiawei Wang, Chengyu Li, Rui Shan, Haoran Yuan   +6 more
wiley   +1 more source

Turning Bonding Into Function: The Emerging Role of the Bioactive Selenium─Metal Motif in Toxicology and Medicinal Chemistry

Chemistry – A European Journal, EarlyView.
Balancing Act: Se─M bond serving as the fulcrum of the balance scale to compare the different weight of toxicity and therapeutic effects in biological environment. ABSTRACT The synthesis and characterization of organo‐selenium compounds have attracted considerable interest for decades, driven by the search for efficient catalysts and bioinspired ...
Matteo Filippi, Alessandro Rubbi, Pablo A. Nogara, Giovanni Ribaudo, Vito Lippolis, João B. T. Rocha, Laura Orian   +6 more
wiley   +1 more source

One hundred years of teaching, research, and innovation in chemical engineering at the Faculty of Chemistry, National Autonomous University of Mexico (UNAM): Birthplace and enduring leadership of the discipline in Mexico

The Canadian Journal of Chemical Engineering, EarlyView.
The teaching of chemical engineering in Mexico started in 1925 at the Faculty of Chemistry (FQ) of the National Autonomous University of Mexico (UNAM). Academic institutions, research centres, chemical companies, technological developments, highly trained personnel, and scientific contributions are part of the legacy from FQ‐UNAM.
Patricia Pérez‐Salinas, Alberto Rosas‐Aburto, Martín G. Hernández‐Luna, Aida Gutiérrez‐Alejandre, Eduardo Vivaldo‐Lima   +4 more
wiley   +1 more source

Synergistic extraction of critical metals from the oxalic leachate of spent FCC catalyst

The Canadian Journal of Chemical Engineering, EarlyView.
Abstract This study introduces an improved hydrometallurgy process utilizing a synergistic approach to improve metal recovery from secondary sources of critical metals. It provides a more efficient alternative to traditional single‐extractant methods for separating critical metals from spent refinery catalysts.
Silindile Gumede, Amir H. Mohammadi, Mbuyu G. Ntunka   +2 more
wiley   +1 more source

Unraveling the Cretaceous-Paleogene boundary event across the Gulf of Mexico-High-resolution Rayon reef section, Valles-San Luis Potosi platform, Mexico.

PLoS ONE
The Cretaceous/Paleogene boundary, marked by the Chicxulub impact ejecta layer has a global distribution, with distal, intermediate and proximal boundary sections of distinct mineralogy, geochemistry and stratigraphy.
Roberto Bartali, Jaime Urrutia-Fucugauchi, Jose Ramon Torres-Hernandez, Ligia Perez-Cruz, Rosa Lina Tovar-Tovar   +4 more
doaj   +1 more source

Sacrificial anode Fered–Fenton process for the degradation of a model naphthenic acid in high‐salinity water

The Canadian Journal of Chemical Engineering, EarlyView.
Fered–Fenton treatment of saline produced water: generation of reactive oxygen species and enhanced degradation of cyclohexane carboxylic acid through in‐situ electrochemical Fenton reactions. Abstract Offshore oilfield produced water (OPW) is a highly complex and hypersaline effluent from oil and gas extraction industry.
Daniela Gier Della Rocca, Silvio Edegar Weschenfelder, Luciana Prazeres Mazur, Edinara Luiz, Daniele Cocco Durigon, João Paulo Winiarski, Rosely Aparecida Peralta, Regina F. P. M. Moreira   +7 more
wiley   +1 more source

Abiotic polycyclic aromatic hydrocarbons originating from the sub-oceanic mantle

Scientific Reports
Experimental studies have demonstrated that petroleum may form from abiotic organic compounds synthesised in the Earth’s upper mantle. However, the most direct evidence of mantle-derived organics, as obtained from whole-rock analyses, indicates ambiguous
Itaru Mitsukawa, Akira Miyake, Yohei Igami, Tetsu Kogiso, Norikatsu Akizawa, Junya Matsuno, Megumi Matsumoto, Akira Tsuchiyama, Kentaro Uesugi, Masahiro Yasutake, Tomoki Taguchi, Yoshio Takahashi, Shohei Yamashita, Shota Okumura   +13 more
doaj   +1 more source

Towards Sustainable Processing of Chromite Resources: A Review of Methods for Magnesium and Platinum-Group Metal Extraction

Inorganics
This article provides a review of modern technologies for processing chromite ores and beneficiation wastes, with a focus on the recovery of magnesium and platinum-group metals (PGMs).
Rinat Abdulvaliyev, Yerkezhan Abikak, Nazym Akhmadiyeva, Sergey Gladyshev, Alfiyam Manapova, Asiya Kasymzhanova   +5 more
doaj   +1 more source

Uniaxial compressive strength prediction and ratio parameter optimization of titanium tailings composite backfill materials using intelligent hybrid models

Deep Underground Science and Engineering, EarlyView.
Based on the 90 datasets, ERT and four optimization algorithms were used to build four hybrid models to predict the UCS of the backfill body. The SMA‐ERT model was the most effective model, and it can reliably guide the design of the backfill ratio parameters. Abstract This study analyzed the feasibility of using titanium (Ti) tailings as a backfilling
Weijun Liu, Zida Liu, Zhixiang Liu
wiley   +1 more source