This senior law thesis examines the place of copper extraction in the Chilean economy and political system and the role that legal regulation played since 1850 up to the late 1960s. Copper has been the principal product of the economy and main source of foreign exchange and government revenue....

Automotive engines are made from different materials like steel, aluminium, copper, and brass. These materials usually come in contact with the fuel. This study provides corrosion rates of automotive materials copper, aluminium, and stainless steel 316l when coming in contact with chicken fat...

Evaporation of sessile droplets on hot surfaces is the most important component in spray cooling and other processes. In this paper, the dynamic characteristics of non-boiling evaporation of sessile droplets on the copper surface are obtained by experimental methods under the condition of...

Development of an under-liquid super-repellent (ULSR) surface that can be used for separating both liquid/liquid and liquid/gas mixtures is strongly desirable, yet still hard to realize. Herein, to address this challenge, a Cu(OH) 2 nanowire textured surface on copper mesh was developed through...

Cu(II)-EDTA is a highly stable typical metal-organic complex in a wide pH range (3.0-12.0) and difficult to deeply purify Cu(II) by conventional precipitation methods. In this study, Fe(III) replacement/diethyldithiocarbamate (DDTC) precipitation combined process was proposed as a promising...

Enrofloxacin (ENR) is a widely used veterinary fluoroquinolone antibiotic and is frequently detected in water environments. In this study, degradation of ENR was investigated by molecular oxygen mediation using nanometer zero-valent copper (nZVC) as the catalyst. The dosage of nZVC, initial pH,...

A weak anion exchange resin (WAER) modified with Cu 2+ ions was prepared and its adsorption behavior for phosphate species in batch and column systems were examined. While pristine WAER adsorbed phosphate species by Bronsted acid-base interaction, the Cu-WAER captured phosphate species mainly...

The development of highly efficient and stable electrocatalysts for their application in electrochemical detection is desirable. Herein, a new copper nanowires (CuNWs) modified electrode was fabricated by coating poly(dimethyl diallyl ammonium chloride) (PDDA) stabilized CuNWs composite onto the...

This paper demonstrates a selective laser melting method to produce a metal matrix composite capable of enhancing the thermal conductivity of 316L stainless steel using a jettable Cu ink. A novel canister for controlling the atmosphere surrounding a powder bed during selective laser melting, was...

Pure copper (Cu) and copper-carbon nanotube (Cu-CNTs) alloys were fabricated using laser powder bed fusion additive manufacturing (LPBF-AM) with a relatively high density. Their location-dependent (i.e., distance from build plate) microstructure and nanomechanical properties at room temperature...

In order to meet the requirements of "wide frequency bands, lightweight, and strong absorption" of absorbing materials, a uniform mixture of FeAl 2 O 4 ferrite and Cu/RGO was obtained by the mechanical mixing method. The Cu/RGO (Reduction Graphene Oxide) composite powders were synthesized by the...

Negative permittivity is a required physical property of metamaterials which has been widely used in some emerging and unconventional applications, such as cloaking, perfect lens and perfect wave absorption. In addition to periodic meta-structured units, a composite with conductive networks,...

Copper sulfides (Cu x S) have been considered as candidates for sodium ion battery (SIB) anodes because they are environmentally friendly and have large theoretical capacity. Whereas, the cycle stability and capacity of Cu x S are still challenge for their practical applications. Here,...

In this work, we highlights 5G antenna (~ 28GHz) using Al 2 O 3 -doped CaO-MgO-SiO 2 glass ceramics with reducing-resistant behavior co-fired with copper electrode. The diffusion behavior between copper electrode and low-temperature-co-fired-ceramics (LTCC) were also studied. Amphoteric Al 3+...

Under Section 201 of the 1974 Trade Act, a domestic industry can obtain temporary protection against imports by demonstrating before the International Trade Commission that it has been injured, and that imports have been the"substantial cause" of injury --i.e.,"a cause which is important and not...

Purchasing mineral rights to allow a corporation to extract minerals is a large investment and potentially very profitable. Generally, the assessment and valuation process is conducted by an official organization at the nation's governmental level. From a corporation perspective it is thus...

Virgin mining is rapidly becoming unsustainable as primary resources are in increasingly short supply and energy consumption continues to increase. Urban mining for scrap metal has emerged as a promising option for securing copper and aluminum resources. However, the sustainability and viability...

Utilization of industrial waste materials has encouraged in construction field for the making of concrete because it contributes to reducing the consumption of natural resources. Self – compacting concrete (SCC) is a high – performance concrete which can flow under its own weight and it...

Three coordination polymers, 1 ∞ [Cu 3 L 2 (NO 3 )](NO 3 )·2MeOH·2H 2 O ( 1 ), 1 ∞ [Cu 3 L 2 (N 3 )](CH 3 COO) ( 2 ) and 1 ∞ [Cu 3 L 2 (H 2 O)](ClO 4 ) 2 ( 3 ), based on the Schiff base H 2 L (H 2 L = N,N'-bis[(2-hydroxybenzilideneamino)-propyl]-piperazine) have been synthesized and...

N- And S-ligands for binuclear copper complexes were synthesized by the С-sp 2 -aminomethylation of 2-naphthol with N,N,N',N'-tetramethyldiaminomethane giving 1-dimethylaminomethyl-2-naphthol, which then reacted with 1,2-ethanedithiol to be converted to thiomethylated derivative. Direct...

The motivation of this paper is to identify the effect of treatment charge (TC) on LME (London Metal Exchange) copper prices. It is a fundamental variable as a supply side factor, because it is related to the smelting process and reflects the level of concentrates market tightness. To examine...

Der Glasfaserausbau in Frankreich ist bereits relativ weit fortgeschritten und der Ausbauplan bis 2025 ist bereits zu über 92% fest kontrahiert. Noch besteht eine Nachfragelücke zwischen den bereits ausgebauten und den aktiv in Betrieb genommenen Glasfaseranschlüssen. Es gibt weder eine klar...

China is now the world's largest consumer and producer of copper. Its demand for the commodity has soared in tandem with the country's industrialization process, given copper's extensive use in infrastructure (e.g., plumbing, telecommunication wiring, and building materials) and manufacturing...

Commodity prices and their secular trends are at the core of many different development theories, particularly relevant for the Latin American region, like the Prebisch-Singer hypothesis, the natural resource curse theory or the somehow malthusian scarcity prediction. In this article we review...

Financial innovation by means of Fintech firms is one of the more disruptive business model innovations from the latest years. Specifically, in the financial advisor sector, worldwide assets under management of artificial intelligence (AI)-based investment firms, or robo-advisors, currently...