According to customs data, China's bismuth trioxide exports in November 2025 reached 720.17 tons, compared to 610.02 tons in October and 411.4 tons in September, marking a significant month-on-month ...
Selenium is an important trace element, but it is toxic if an excess is taken. Selenosis can occur when the tolerable upper intake level of selenium exceeds 400 mg per day. Elemental selenium, as well ...
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