Results 91 to 100 of about 1,624,767 (350)

Al–Cu Composite Casting of Laser‐Deoxidized Copper: Bonding, Interfacial Chemistry, and Thermal Conductivity

open access: yesAdvanced Engineering Materials, EarlyView.
This study investigates laser‐based oxide removal of Cu inserts in oxygen‐free conditions and examines long‐term oxidation kinetics and surface chemistry under different atmospheres via X‐ray photoelectron spectroscopy. Al–Cu compound casting with differently oxidized surfaces is performed, and intermetallic phase formation, morphology, and thermal ...
Timon Steinhoff   +9 more
wiley   +1 more source

Synthesis of silver (Ag) nano/micro-particles via green process using Andrographis paniculata leaf extract as a bio-reducing agent

open access: yesCommunications in Science and Technology
In this work silver nano/micro-particles have been synthesized using sambiloto (Andrographis paniculata) plant extract as a bio-reducing agent. The effects of different plant extract concentrations, AgNO3 precursor concentrations, and reaction time on ...
Achmad Chafidz   +6 more
doaj   +1 more source

Spectroscopic and first-principles calculation studies of the chemical forms of palladium ion in nitric acid solution for development of disposal of high-level radioactive nuclear wastes

open access: yesAIP Advances, 2018
We have investigated the chemical forms of palladium (Pd) ion in nitric acid solution, using XAFS/UV-vis spectroscopic and first-principles methods in order to develop the disposal of high-level radioactive nuclear liquid wastes (HLLW: radioactive metal ...
Shinta Watanabe   +8 more
doaj   +1 more source

A theoretical and experimental spectroscopy study on methanol and ethanol conversion over H-SAPO-34 [PDF]

open access: yes, 2011
The elucidation of the structure-activity relation of zeolites or zeotype materials remains very challenging. Recent advances in both theoretical and experimental techniques provide new opportunities to study these complex materials and any catalytic ...
De Wispelaere, Kristof   +6 more
core  

New two in one magnetic fluorescent nanocomposites [PDF]

open access: yes, 2005
Magnetite nanoparticles have been coated by a porphyrin derivative to produce new magnetic materials with fluorescent properties. The magnetic nanoparticles were prepared using two different methods, one based on sol-gel techniques and ultrasonic ...
Byrne, S.J.   +5 more
core   +1 more source

Additive Manufacturing of Continuous Fibre Reinforced Composites: Process, Characterisation, Modelling, and Sustainability

open access: yesAdvanced Engineering Materials, EarlyView.
Additive manufacturing provides precise control over the placement of continuous fibres within polymer matrices, enabling customised mechanical performance in composite components. This article explores processing strategies, mechanical testing, and modelling approaches for additive manufactured continuous fibre‐reinforced composites.
Cherian Thomas, Amir Hosein Sakhaei
wiley   +1 more source

Synthesis and Characterization of CuO/graphene oxide composite [PDF]

open access: yes, 2013
Copper oxide and graphene oxide composite have been prepared successfully. The prepared composite have been characterized by XRD, SEM and UV-Vis. Band gap calculation using formula Eg= hʋ from UV-Vis shows a decrease in band gap. The electrical transport
Rout, Smrutirekha
core  

Cathodic Cage Plasma Deposition of Nanostructured Cu–Fe–Se Coatings on Poly(methyl Methacrylate)

open access: yesAdvanced Engineering Materials, EarlyView.
Nanostructured Cu–Fe–Se coatings are deposited on PMMA by a modified cathodic cage plasma process, enabling low‐temperature deposition on polymer substrates. A transition from discontinuous to compact morphology is observed with temperature, with optimal properties at 200°C, where improved CuFeSe2‐type bonding, lowest sheet resistance, and favorable ...
V. S. S. Sobrinho   +8 more
wiley   +1 more source

Perbedaan Kadar Trigliserida Menggunakan Alat Spektrofotometer Uv-Vis dengan Fotometer pada Mahasiswa Obesitas di Universitas ‘Aisyiyah Yogyakarta

open access: yesJournal of Health (JOH)
Laboratory tests are used to help diagnose diseases. One of them is the examination of triglyceride levels which is generally performed on obese patients who have a history of cardiovascular disease, type 2 diabetes mellitus, and hypertension.
Mar’atun Soalihah   +2 more
doaj   +1 more source

A rapid method for methanol quantification in spirits using UV-visible spectroscopy and FTIR [PDF]

open access: yesPeerJ Analytical Chemistry
Although standards methods of food safety assessment are important, these methods are relatively expensive and require intensive work and time. In alcohol beverage industries, ultraviolet visible (UV-Vis) spectroscopy and Fourier transform infrared (FTIR)
Ronick S. Shadrack   +6 more
doaj   +2 more sources

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