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Evaluation of Pencycuron Residue Dynamics in Eggplant Using LC-MS/MS and Establishment of Pre-Harvest Residue Limits.
Foods
November 2024
Department of Applied Bioscience, Dong-A University, Busan 49315, Republic of Korea.
Pencycuron is a fungicide whose maximum residue limit (MRL) in eggplant is either set at very low levels (0.02 mg/kg in European Union) or remains unestablished in many countries, necessitating stringent pesticide management. To enable timely interventions by farmers and regulators, pre-harvest residue limits (PHRLs) propose maximum allowable pesticide concentrations for each day during the pre-harvest period.
View Article and Find Full Text PDFContamination and health risk assessment of potentially toxic elements in rice (Oryza sativa) and soil from Ashanti Region.
Environ Monit Assess
October 2024
Department of Chemistry Education, Akenten Appiah-Menka University of Skills Training and Entrepreneurial Development, Asante Mampong, Ghana.
Article Synopsis
- Anthropogenic activities introduce toxic elements like arsenic (As), cadmium (Cd), chromium (Cr), mercury (Hg), and lead (Pb) into the environment, affecting the food chain, particularly rice grown in the Asante Akim area.
- The research measured the concentrations of these elements in soil and rice using advanced analytical techniques, finding that most levels in rice were below the maximum allowable concentration (except slightly elevated Cd).
- Health risk assessments indicated no significant non-carcinogenic health risks from consuming the rice, although continued monitoring of heavy metal levels is recommended due to potential accumulation over time.
A detailed simulation study on radionuclide dispersion under spent fuel road transportation conditions: Effects of vessel type and coniferous vegetation growth.
J Hazard Mater
December 2024
Institute of Nuclear Energy Safety Technology, Hefei Institutes of Physical Science, Chinese Academy of Sciences, Hefei, Anhui 230031, China. Electronic address:
Vegetation barriers are an important environmental characteristic of spent fuel road transportation accidents. Spent fuel vessels may be affected by force majeure factors during transportation, which leads to damage to spent fuel assemblies and containers and can cause radionuclides to gradually release from assemblies to vessels to the external environment. In this work, considering the growth periods of coniferous vegetation barriers and vessel type, a radionuclide dispersion model based on computational fluid dynamics (CFD) was established by adding a decay term and a pressure loss term.
View Article and Find Full Text PDFLead in umbilical cord blood and associated factors in Casablanca Morocco: A preliminary results.
J Trace Elem Med Biol
September 2024
Department of Zoology and Animal Ecology, Scientific Institute, Mohammed V University in Rabat, B.P. 1040, Ibn Battuta Av, Rabat 10100, Morocco.
Background: Lead is the most common toxic metal to which Moroccans are exposed. Given the susceptibility of the fetus to lead, it is crucial to assess prenatal lead exposure. However, in Morocco, no study has assessed prenatal exposure to lead.
View Article and Find Full Text PDFThe original Spacecraft Maximal Allowable Concentrations (SMACs) for toluene (set for 1 h, 24 h, 7 d, 30 d, and 180 d) were first established by NASA in 1996 based on a human study in which no irritation or neurotoxicity was reported following 6-h exposure to 40 ppm toluene vapors. While the toluene SMACs were updated in 2008 to account for auditory, visual, and hormonal effects (for 7 d, 30 d, and 180 d) and to include a long-term SMAC (1000 d) in anticipation of longer spaceflight exploration missions, the short-term SMAC limits (1 h and 24 h) remained unchanged. Acute toluene exposure is reported to result in ocular and nasal irritation, although it is not a primary irritant, as well as central nervous system effects including headaches and dizziness.
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