Results 11 to 20 of about 535,515 (262)

A Fabrication of Multichannel Graphite Electrode Using Low-Cost Stencil-Printing Technique

open access: yesSensors, 2022
Multichannel graphite electrodes (MGrEs) have been designed and fabricated in this study. A template was cut from an adhesive plastic sheet using a desktop cutting device.
Supatinee Kongkaew   +6 more
doaj   +1 more source

Wearable energy devices on mask-based printed electrodes for self-powered glucose biosensors

open access: yesSensing and Bio-Sensing Research, 2022
Wearable sensor technology is a key to sustainable healthcare systems because of its unique capability to assess a wearer's state of wellbeing. We must continue to explore the sensible integration of sensors into wearable and energy-sustainable systems ...
Itthipon Jeerapan   +2 more
doaj   +1 more source

Option Tracing: Beyond Correctness Analysis in Knowledge Tracing [PDF]

open access: yes, 2021
Knowledge tracing refers to a family of methods that estimate each student's knowledge component/skill mastery level from their past responses to questions. One key limitation of most existing knowledge tracing methods is that they can only estimate an \emph{overall} knowledge level of a student per knowledge component/skill since they analyze only the
Aritra Ghosh 0001   +2 more
openaire   +2 more sources

Determination of Endocrine Disrupting Chemicals in Water and Wastewater Samples by Liquid Chromatography-Negative Ion Electrospray Ionization-Tandem Mass Spectrometry

open access: yesMolecules, 2020
A liquid chromatography-negative ion electrospray ionization-tandem mass spectrometry method was developed for the simultaneous analysis of bisphenol A, 4-octylphenol, 4-nonylphenol, diethylstilbestrol, 17β-estradiol, estriol, estrone, 17α ...
Ghada Aborkhees   +2 more
doaj   +1 more source

A History of Andesite Production via Magma Mixing and Mingling Revealed Microscopically at Ngauruhoe Volcano

open access: yesGeochemistry, Geophysics, Geosystems, 2022
Many andesites erupted at arc volcanoes are the products of magma mixing, and this process could be important in triggering their eruption. Throughout the life of Ngauruhoe volcano (∼2.5 ka), erupted andesites lack macroscopic enclaves or lithological ...
Kate Cocker   +4 more
doaj   +1 more source

Laser-induced breakdown spectroscopy instrument and spectral analysis for deep-ocean Fe-Mn crusts

open access: yesFrontiers in Marine Science, 2023
IntroductionMarine ferromanganese crusts are potentially important metal resources.The deep-ocean research and survey ships often need to carry out rapid chemical element component analysis of mineral resources, so as to plan for the geological resource ...
Guang Yang   +8 more
doaj   +1 more source

Field Evaluation of Solid Sorbents for Ambient Air Sampling of Pesticides

open access: yesAir, Soil and Water Research, 2010
Seven solid sorbents including Amberlite ® XAD-2 and XAD-4, Tenax-TA ® , Anasorb-747, Chromosorb 102, 108, and 750 were evaluated for the collection of the gas phase fraction of pesticides under field conditions at an agricultural site, Bratt's Lake, SK,
Renata Raina, Patricia Hall
doaj   +1 more source

A Novel Microfluidic-Based OMC-PEDOT-PSS Composite Electrochemical Sensor for Continuous Dopamine Monitoring

open access: yesBiosensors, 2022
Fast and precise analysis techniques using small sample volumes are required for next-generation clinical monitoring at the patient’s bedside, so as to provide the clinician with relevant chemical data in real-time.
Sofwan Nuh   +3 more
doaj   +1 more source

Online immunocapture ICP-MS for the determination of the metalloprotein ceruloplasmin in human serum

open access: yesBMC Research Notes, 2018
Objective The human copper-protein ceruloplasmin (Cp) is the major copper-containing protein in the human body. The accurate determination of Cp is mandatory for the reliable diagnosis of several diseases.
Bogdan Bernevic   +3 more
doaj   +1 more source

Total Versus Inorganic and Organic Species of As, Cr, and Sb in Flavored and Functional Drinking Waters: Analysis and Risk Assessment

open access: yesMolecules, 2020
Packing material can release certain elements such as As, Cr, or Sb into its content and, thus, contaminate the drinking water. The effect of As, Cr, and Sb on human health depends highly on the chemical species in which these elements are introduced ...
Wiktor Lorenc   +4 more
doaj   +1 more source

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