Results 101 to 110 of about 63,191 (286)

Estimating Illicit Stimulant Drug Consumption in Luxembourg Using Wastewater‐Based Epidemiology

Drug Testing and Analysis, EarlyView.
Wastewater‐based epidemiology provided nationwide estimates of illicit stimulant consumption in Luxembourg, revealing higher urban use, weekend increases in cocaine and MDMA, and cocaine as the dominant stimulant. The approach offers an objective complement to conventional drug surveillance for informing public health and policy.
Nadine Berndt, Luca Wiltgen, Nicolas Villani, Georges Dahm, Karin Roschel, Serge Schneider   +5 more
wiley   +1 more source

A Validated Low-LOQ Study of Cannabinoid Content in Cold-Pressed Hemp Seed Oil (CPHSO) Manufactured in North America [PDF]

, 2020
A study of cannabinoid content in commercially available cold-pressed hemp seed oil (CPHSO) manufactured in North America and assayed using a validated low-LOQ analytical method with UHPLC-MS/MS quantitation was conducted. Thirty CPHSO samples from small, medium, and large-scale manufacturers were voluntarily submitted.
openaire   +1 more source

A Single‐Aliquot Strategy for Simultaneous Carbon Isotope Confirmation of 6‐Oxo‐Androstenedione and Testosterone Misuse in Doping Control

Drug Testing and Analysis, EarlyView.
This method enables simultaneous carbon isotope confirmation of 6‐oxo‐androstenedione and testosterone markers from a single urine aliquot, using bench‐top extraction, two preparative HPLC steps with intermediate acetylation, and GC/C/IRMS analysis. It was fully validated according to WADA requirements, and real samples demonstrated its fitness for ...
Fábio Azamor de Oliveira, Cristiane Abrantes da Silva, Carolina dos Reis Farias, Mariana Trad Rosner da Motta, Thais Reis da Silva, Natasha Veiga Louzada, Monica Costa Padilha, Henrique Marcelo Gualberto Pereira   +7 more
wiley   +1 more source

Determination of Aflatoxins and Selected Heavy Metals in Rice Varieties Cultivated in Fogera, Amhara Region, Ethiopia

Food Chemistry International, EarlyView.
ABSTRACT Rice (Oryza sativa L.) is a vital staple crop for nearly half the world's population. This study investigates the levels of aflatoxins (AFB1, AFB2, AFG1, and AFG2) and selected heavy metals (Cd, Pb, and Cr) and essential elements (Mn, Fe, Mg, Cu, and Zn) in rice varieties cultivated in Fogera, Amhara Region, Ethiopia.
Melese Tilahun, Bisratewongel Tegegne, Nibret Mekonen, Agegnehu Alemu   +3 more
wiley   +1 more source

Comparative statistical evaluation of greenness, blueness, and whiteness spectrophotometric methods for dexamethasone and chloramphenicol estimation

Scientific Reports
Five sustainable and validated UV spectrophotometric methods were developed for analyzing chloramphenicol (CHL) and dexamethasone sodium phosphate (DSP) in pure and ophthalmic dosage forms. CHL was detected by zero order spectra method at 292.0 nm in the
Heidi R. Abd El-Hadi
doaj   +1 more source

LIMIT OF DETECTION (LOD) AND LIMIT OF QUANTITATION (LOQ) OF DR 1900 SPECTROPHOTOMETER FOR DYES ANALYSIS

Berkala Penelitian Teknologi Kulit, Sepatu, dan Produk Kulit
Dyes is not easily degraded in the environment. It can be causing environmental pollution. The concentration of these dyes must be monitored when using it in a process. The most common method to measuring dye’s concentration is spectrometry, such as using dr 1900 spectrophotometer.
null Wijayanti, Siti Rochmah
openaire   +1 more source

Limit of detection (LOD), limit of quantitation (LOQ) and linearity (R²) for HPLC with UV detection.

, 2019
Limit of detection (LOD), limit of quantitation (LOQ) and linearity (R2) for HPLC with UV detection.
Klaus Wolkenstein (1367886), Susanne Affenzeller (5698157), Tobias Licha (160953), Holm Frauendorf (821261), Daniel J. Jackson (7513151)   +4 more
core   +1 more source

Food Contamination and Safety in Nigeria: A Systematic Synthesis of Heavy Metals, Microbial Pathogens, and Health Risk Metrics

Food Safety and Health, EarlyView.
This is an infographic driver of food contaminants and health effects. ABSTRACT Food safety remains a critical challenge in Nigeria due to rapid urbanization and weak regulatory enforcement. This systematic review synthesizes empirical evidence from 2015 to 2025 to characterize food contaminant profiles and associated human health risks in Nigeria ...
Cecilia Nwadiuto Obasi, Naomi A. Mogborukor, Baridoo Donatus Dooka, Polycarp Dauda Madaki, Chiara Frazzoli, Mohamed Haddad, Orish Ebere Orisakwe   +6 more
wiley   +1 more source

Intentional Learning Theory: Validating Its Measurement

SAGE Open
The purpose of this article is to describe and analyze the psychometric properties of the Learning Orientation Questionnaire (LOQ), which have not been previously published.
Sarah Mollman, Timothy J. Muckle, Margaret Martinez   +2 more
doaj   +1 more source

Detection and Quantification Challenges in Microplastics Research: A Statistical Overview

Microplastics
Detection and quantification of microplastics are undermined by the absence of appropriate methods in some contexts—such as a statistically principled LOD for particle-count data—but more pervasively by the uncritical application of ostensibly simple ...
Fabio D’Ottaviano, Kyle Hart
doaj   +1 more source