The natural co-occurrence of aflatoxins (AFs) and ochratoxin A (OTA) in liquorice roots obtained from different herbal outlets of Karachi, Pakistan, was evaluated. A total of 60 samples were obtained during 2019‒2021 and analysed using HPLC with fluorescence detection. The method was validated according to the European Union (EU) regulation. The incidence of AFs was 52 in all tested samples (87%), with a contamination range of 1.2‒6.4 µg kg and an average of 2.1 ± 0.3 µg kg. In all samples, the AFs contamination was below the maximum limit (ML) of 10 µg kg for total AFs as set by the EU. The OTA contamination in all samples ranged 1.5‒60.3 µg kg, with a mean of 18.9 ± 0.8 µg kg. In 36 samples (60%) the OTA contamination was below the ML of 20 µg kg as set by the EU. These results led to the recommendation to test liquorice root on mycotoxins, as it comes to food quality standards.
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http://dx.doi.org/10.1080/19393210.2023.2253210 | DOI Listing |
Microorganisms
January 2025
Lhasa Plateau Ecosystem Research Station, Key Laboratory of Ecosystem Network Observation and Modeling, Institute of Geographic Sciences and Natural Resources Research, Chinese Academy of Sciences, Beijing 100101, China.
Grazing intensity is one of the crucial anthropogenic activities on alpine grasslands. However, how grazing intensity affects soil microorganism diversities and their co-occurrence networks in alpine steppe remains uncertain. We carried out a controlled grazing experiment (null grazing, CK; moderate grazing, MG; and heavy grazing, HG) on a typical alpine steppe in the Lhasa River Basin, Central Tibet, China.
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January 2025
Institute of Natural Resources and Ecology, Heilongjiang Academy of Science, Harbin 150040, China.
Increasing nitrogen (N) addition induces soil nutrient imbalances and is recognized as a major regulator of soil microbial communities. However, how soil bacterial abundance, diversity, and community composition respond to exogenous N addition in nutrient-poor and generally N-limited regions remains understudied. In this study, we investigated the effects of short-term exogenous N additions on soil bacterial communities using quantitative polymerase chain reaction (PCR) and Illumina Miseq sequencing in an in situ N addition field experiment.
View Article and Find Full Text PDFBiomolecules
December 2024
Key Laboratory of Integrated Rice-Fish Farming Ecology, Ministry of Agriculture and Rural Affairs, Freshwater Fisheries Research Center, Chinese Academy of Fishery Sciences, Wuxi 214081, China.
Microorganisms, including bacteria, fungi, and protists, are key drivers in aquatic ecosystems, maintaining ecological balance and normal material circulation, playing vital roles in ecosystem functions and biogeochemical processes. To evaluate the environmental impact of different river crab polyculture practices, we set up two different river crab () polyculture practices: one where river crabs were cultured with mandarin fish (), silver carp (), and freshwater fish stone moroko (), and another where river crabs were cultured just with mandarin fish and silver carp. These two polyculture practices were referred to as PC and MC, respectively.
View Article and Find Full Text PDFMicrobiome
January 2025
State Key Laboratory for Crop Stress Resistance and High-Efficiency Production, Shaanxi Key Laboratory of Agricultural and Environmental Microbiology, College of Life Sciences, Northwest A&F University, Yangling, Shaanxi, 712100, People's Republic of China.
Background: Seed-associated microorganisms play crucial roles in maintaining plant health by providing nutrients and resistance to biotic and abiotic stresses. However, their functions in seed germination and disease resistance remain poorly understood. In this study, we investigated the microbial community assembly features and functional profiles of the spermosphere and endosphere microbiomes related to germinated and ungerminated seeds of Astragalus mongholicus by using amplicon and shotgun metagenome sequencing techniques.
View Article and Find Full Text PDFToxics
January 2025
College of Biological and Agricultural Engineering, Jilin University, Changchun 130022, China.
Atrazine causes serious contamination of agricultural soils and groundwater. This study investigated the influence mechanism of sterilized soil (CKs), unsterilized soil (CKn), sterilized soil amended with 45 (SsV1), 60 (SsV2), 75 (SsV3) days of vermicompost (the maturity days of vermicompost), and unsterilized soil amended with 45 (SnV1), 60 (SnV2), 75 (SnV3) days of vermicompost on atrazine catabolism. The atrazine degradation experiment lasted for 40 days.
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