Results 11 to 20 of about 1,913,153 (219)

Optimization of Flow Injection (FI) – Spectrophotometry for Hydroquinone Analysis [PDF]

open access: yesJournal of Pure and Applied Chemistry Research, 2019
Hydroquinone is one of the phenolic compounds used in various cosmetic products for skin lightening as it can inhibit tyrosinase enzyme in producing melanin.
Muhammad Iqbal Fahmi   +3 more
doaj   +1 more source

A Study on the Effect of Ambient Air Plasma Treatment on the Properties of Methylammonium Lead Halide Perovskite Films

open access: yesMetals, 2019
Organic-inorganic halide perovskite materials are considered excellent active layers in the fabrication of highly efficient and low-cost photovoltaic devices.
Masoud Shekargoftar   +2 more
doaj   +1 more source

Simple and Rapid Device for Mercury Detection Based on The Formation of Mercury(II)-Dithizonate on Polytetrafluoroethylene (PTFE) Membrane [PDF]

open access: yesJournal of Pure and Applied Chemistry Research, 2019
A new analytical device for mercury detection has been developed by doping dithizone on to hydrophobic PTFE (polytetrafluoroethylene) membrane to form a blue dithizone membrane which instantaneously changed to orange color of mercury(II)-dithizonate ...
Hermin Sulistyarti   +4 more
doaj  

Cold Plasma: The Way to Improve the Repeatability of Sald ICP-MS Analysis

open access: yesHungarian Journal of Industry and Chemistry, 2018
This work deals with the preparation of model biological microsamples for Substrate-Assisted Laser Desorption Inductively Coupled Plasma Mass Spectrometry (SALD ICP-MS).
Stiborek Marek   +4 more
doaj   +1 more source

A Simple and Safe Spectrophotometric Method for Iodide Determination

open access: yesMakara Journal of Science, 2015
In order to practice green chemistry, a simple and safe spectrophotometric method for iodide determination has been successfully developed based on the formation of a blue starch-iodine complex. Iodide was oxidized to form iodine prior to the addition of
Hermin Sulistyarti   +4 more
doaj   +1 more source

Early Childhood Stimulating Environment Predicts Later Childhood Resilience in an Indian Longitudinal Birth Cohort Study

open access: yesChildren, 2022
Background: Human resilience is dynamic and generated through myriad interactions starting from early childhood. Resilience can improve quality of life and longevity.
Beena Koshy   +8 more
doaj   +1 more source

Low-Cost Dual-Frequency GNSS Receivers and Antennas for Surveying in Urban Areas

open access: yesSensors, 2023
Low-cost dual-frequency global navigation satellite system (GNSS) receivers have recently been tested in various positioning applications. Considering that these sensors can now provide high positioning accuracy at a lower cost, they can be considered an
Veton Hamza   +3 more
doaj   +1 more source

Identification of indicators of antibiotic pollution in typical karst groundwater in southwestern China

open access: yes地质科技通报
Objective The karst area in southwestern China is one of the three concentrated karst distribution areas in the world. Karst groundwater is highly susceptible to pollution from the surface due to the unique structure of aquifers.
Fuyang HUANG   +5 more
doaj   +1 more source

Impact of universal home visits on maternal and infant outcomes in Bauchi state, Nigeria: protocol of a cluster randomized controlled trial

open access: yesBMC Health Services Research, 2018
Background Maternal mortality in Nigeria is one of the highest in the world. Access to antenatal care is limited and the quality of services is poor in much of the country.
Anne Cockcroft   +4 more
doaj   +1 more source

SNAPPERGPS: Open Hardware for Energy-Efficient, Low-Cost Wildlife Location Tracking with Snapshot GNSS

open access: yesJournal of Open Hardware, 2023
Location tracking with global navigation satellite systems (GNSS), such as GPS, is used in many applications, including the tracking of wild animals for research.
Jonas Beuchert   +2 more
doaj   +1 more source

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