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| http://dx.doi.org/10.29245/2689-999x/2023/2.1183 | DOI Listing |
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Seasonal variability and risk evaluation of emerging organic contaminants in European river: linking in silico and in vitro approaches to prioritize hazardous EOCs.
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University of St. Thomas, Department of Biology, Mail OWS 390, 2115 Summit Ave, Saint Paul, MN, 55105, USA.
Emerging organic contaminants (EOCs) are a growing concern for aquatic ecosystems, underscoring the need for advanced risk assessment methodologies. This study employed an integrated approach to evaluate the risks associated with 563 EOCs across 13 monitoring sites along the Sava River in Croatia. Sampling was conducted during the winter and spring months, spanning February to May.
View Article and Find Full Text PDFAlkaloids and Nitrosamines in Betel Quid: A Biochemical Exploration of Carcinogenicity.
Chem Biol Interact
January 2025
Department of Community Dental Health, Faculty of Dental Sciences, University of Sri Jayewardenepura, Gangodawila, Nugegoda, Sri Lanka.
Betel quid contains two major ingredients; Areca catechu and Piper betel, often consumed with slaked lime, tobacco, certain flavouring agents, colouring agents, herbs, and spices according to personal preferences. The areca nut alkaloids (arecoline, arecaidine, guvacine, and guvacoline), and tobacco alkaloids (nicotine, nor-nicotine) undergo nitrosation during chewing in the oral cavity with the presence of nitrite and thiocyanate and endogenously. Among the nitrosation products generated areca nut-derived nitrosamine (ADNA): 3-(methylnitrosamino) Propionitrile (MNPN) and the two tobacco-specific nitrosamines (TSNAs); N'-nitrosonornicotine (NNN) and 4-(methylnitrosamino)-1-(3-pyridyl)-1-butanone) (NNK) are considered Group 1 human carcinogens.
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Cureus
December 2024
Internal Medicine, University of Connecticut Health, Farmington, USA.
Introduction Despite limited knowledge of its potential health effects, electronic cigarette (e-cigarette) use has become increasingly popular in the United States (US). Cigarette smoking is linked to a higher risk of asthma, and e-cigarettes may have similar effects. This study's aim was to examine the association between e-cigarette use and asthma exacerbations in US adults with known asthma.
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- Substance use disorders among pregnant and postpartum individuals are increasing, highlighting the need for better education and intervention for healthcare providers.
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Male rats choose higher doses of nicotine in anticipation of a signalled period of drug non-availability.
Neurobiol Learn Mem
January 2025
School of Psychology, University of New South Wales, Australia. Electronic address:
Humans and animals use information about future access to rewards to influence their behaviour in the present, however the evidence for this is largely anecdotal. Here we use the nicotine intravenous self-administration paradigm to ask whether rats can use an auditory stimulus signalling a long (450 s) signalled time-out on the next trial to influence their nicotine intake in the present. Rats were trained to choose between low (15 µg/kg/infusion), medium (30 µg/kg/infusion) or high (60 µg/kg/infusion) doses of nicotine on any given trial.
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