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Research Article | 15-February-2020

Acoustic emission testing of electrical stressed copper trace

Copper becomes more and more important in the electronic industry. This metal is more resilient than conventional materials (like aluminium) due to the higher electrical and thermal conductivity. During several electrical stress pulses the copper changes. The surface can melt up and cracks and voids can develop inside the copper specimen. In this paper we use acoustic emission testing to analyse copper degradation especially of copper and copper traces. It is evaluated if an acoustic wave

Daniela Florian, Thomas Wiesner, Bernhard G. Zagar

International Journal on Smart Sensing and Intelligent Systems, Volume 7 , ISSUE 5, 1–6

research-paper | 12-August-2019

Modulation of catalase, copper and zinc in the hippocampus and the prefrontal cortex in social isolation-induced depression in male rats

depression in socially isolated people is not fully understood. In this study, we hypothesized that fourteen days of social isolation would lead to a reduction in zinc and copper levels and catalase activity in the hippocampus and prefrontal cortex that may contribute to the occurrence of depression. The prefrontal cortex is a brain region often investigated in psychiatric illnesses (Vostrikov et al., 2007). The hippocampus is also of particular importance for studying depressive and anxiety behavior

Hamidreza Famitafreshi, Morteza Karimian

Acta Neurobiologiae Experimentalis, Volume 79 , ISSUE 2, 184–192

Research Article | 06-December-2011

Copper (II) oxide thin film for methanol and ethanol sensing

A nanostructured copper (II) oxide film deposited by reactive DC-magnetron sputtering technique, has been studied for static sensor response towards methanol and ethanol by operating temperature and analyte concentration modulations. The optimum operating temperature (Topt) for the sensing of methanol and ethanol is observed to be 350 ˚C and 400 ˚C, respectively. The maximum sensitivity observed for 2500 ppm methanol and ethanol is 29% and 15.4% respectively. Another important observation is

Mitesh Parmar, K. Rajanna

International Journal on Smart Sensing and Intelligent Systems, Volume 4 , ISSUE 4, 710–725

Article | 28-August-2018

SURFACE BLAST-CLEANING WASTE AS A REPLACEMENT OF FINE AGGREGATE IN CONCRETE

In the article the possibility of using a surface blast-cleaning waste as a replacement of fine aggregate in concrete manufacturing was presented. Concretes with w/c ratio 0.6 and 300 kg/m3 dosage of cements: CEM I 32.5R and CEM II/B-V 32.5N were tested. The quite high value of the w/c ratio resulted in good compactibility of the mixtures without use of plasticizer. The replacement rate of the fine aggregate (0–2 mm) with copper slag (CS) was 33%, 66% and 100% respectively. Concretes of the

Wojciech KUBISSA, Roman JASKULSKI, Tamás SIMON

Architecture, Civil Engineering, Environment, Volume 10 , ISSUE 3, 89–94

Article | 31-December-2020

EVALUATION OF THE INFLUENCE OF THE PERCENTAGE OF COPPER CONTENT ON THE PHYSICAL AND CHEMICAL PROPERTIES OF THE FRICTION MATERIAL

Copper is one of the main components of friction materials used in vehicles’ brake systems. It is mainly used due to two features: good thermal conductivity and lubricity. Unfortunately, it is harmful no only to humans but also more to aquatic life. For this reason, there is an attempt to minimize its use. This paper presents the results of testing four groups of samples with different Cu contents (5, 10, 15, and 20%). Laboratory tests were performed using calorimetry, hot wire method

Andrzej BORAWSKI, Wojciech TARASIUK, Eliza BORAWSKA, Bożena SZCZUCKA-LASOTA, Michał KRZYSZTOFORSKI

Transport Problems, Volume 15 , ISSUE 4, Part 1, 29–38

Article | 10-June-2019

CHARACTERISTICS AND USE OF MULTICOPPER OXIDASES ENZYMES

1. Introduction Multicopper Oxidases, MCO are a family of enzymes that catalyse oxidation reactions of a substrate with simultaneous reduction of molecular oxygen to water. The universal catalytic centre is responsible for these reactions for all MCOs, composed of 4 or more copper atoms which form T1, T2 types and diatomic T3 types. Although the structure of the catalytic centre of most enzymes classified as MCO is similar, their biological functions and catalytic properties may be completely

Aleksandra Góralczyk-Bińkowska, Anna Jasińska, Jerzy Długoński

Postępy Mikrobiologii - Advancements of Microbiology, Volume 58 , ISSUE 1, 7–18

original-paper | 01-May-2021

First Description of Various Bacteria Resistant to Heavy Metals and Antibiotics Isolated from Polluted Sites in Tunisia

toxic at high concentration. Soil, water, and air are the major environmental compartments, which are affected by heavy metals pollution leading to many adverse impacts (Tchounwou et al. 2012). In this study, we focused on copper, silver, and mercury. These heavy metals are more and more used in many applications and are also found in different areas worldwide (Kerfoot et al. 2002; 2004). Copper is an essential element that is toxic at high concentrations (Chihomvu et al. 2015). High cytoplasmic

SAMAR BEN MILOUD, OLFA DZIRI, SANA FERJANI, MUNTASIR MD ALI, MOHAMED MYSARA, ILHEM BOUTIBA, ROB VAN HOUDT, CHEDLY CHOUCHANI

Polish Journal of Microbiology, Volume 70 , 1–14

Research Article | 21-May-2019

BACTERIAL METALLOTHIONEINS

Heavy metals are found in all living organisms where, as indispensable microelements (e.g. zinc, iron, copper), are involved in endless metabolic processes. However, living organisms are also at a risk of exposure to highly toxic metals, including cadmium or lead, which do not play any physiological role. Among multiple mechanisms associated with the maintenance of micronutrient homeostasis and detoxification of unwanted metals, there is a family of low-molecular-weight, cysteine-rich proteins

Agnieszka Mierek-Adamska, Wioleta Tylman-Mojżeszek, Zuzanna Znajewska, Grażyna B. Dąbrowska

Postępy Mikrobiologii - Advancements of Microbiology, Volume 56 , ISSUE 2, 171–179

research-article | 30-November-2019

Spectral filtering copper-coated hibiscus-butanol extract for photovoltaic cells

power current (imp) = 366 mA. The rating of the polycrystalline solar panel is: open circuit voltage (Voc) = 22.466 V; short circuit current (Isc) = 0.235 A; maximum power voltage (Vmp) = 18.436 V; and maximum power current (Imp) = 0.220 A. The Hibiscus sabdariffa flower was blended with butanol and filtered. The filtrate collected into a beaker. The 10 ml of the filtrate was mixed with 0.0045 moles of Cu(NO3)2.3H2O and left a day to enable the proper dissolution of copper. The color of the filtrate

M. E. Emetere, Gabe-Oji Testimony

International Journal on Smart Sensing and Intelligent Systems, Volume 13 , ISSUE 1, 1–6

Article | 01-March-2012

DEVELOPMENT OF SEMI-QUANTITATIVE ANALYTICAL SYSTEM FOR METAL NANOPARTICLE INK USING LASER-INDUCED BREAKDOWN SPECTROSCOPY

This paper describes the semi-quantitative analysis of metal nanoparticle ink using laser-induced breakdown spectroscopy (LIBS). LIBS can be used to obtain information about the density and chemical composition of silver particles or copper particles, even ultrafine particles. Metal particles have been attracting much attention because of their increased use in new micro-nano technologies. In this work, LIBS was used as a fine metal particle measurement system for nanometallic materials used in

S. Ikezawa, M. Wakamatsu, T. Ueda

International Journal on Smart Sensing and Intelligent Systems, Volume 5 , ISSUE 1, 215–232

Research Article | 13-December-2017

A NOVEL METHOD FOR THE IMPROVEMENT IN THERMOELECTRIC PROPERTY OF TIN OXIDE THIN FILMS AND ITS APPLICATION IN GAS SENSING

Tin oxide thin film deposited on to glass substrates by the process of DC reactive magnetron sputtering has been used in our work. These films were characterized for their thermoelectric behavior. Further, a novel method has been developed to enhance the Seebeck coefficient of these films. Prior to the oxide film deposition on the glass substrate, thin metal films have been deposited at the two ends of the sample. High conductivity metals such as chromium, silver and copper were used for this

Anuradha S, K. Rajanna

International Journal on Smart Sensing and Intelligent Systems, Volume 1 , ISSUE 2, 498–511

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