“He Yuan Li Ji” was established as a joint venture between He Yuan Bio (stock code: 688238) and Li Ji Bio, with its core business centered on the “Li Ji Bio” and “Life-ilab” reagent brands.

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Are the tiny black spots in the serum “black mold” or “black yeast”?

Publication date：2026-10-29
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Excessive temperature differences during serum thawing, repeated freeze–thaw cycles, or heat inactivation can all increase the likelihood of precipitate formation. Under microscopic examination, some of these precipitates appear as small black particles exhibiting Brownian motion; in the industry, this is often referred to as “black‑glue‑bug” contamination. For removing these contaminants, Xiao L recommends Li Ji’s Black‑Glue‑Bug Removal Agent, catalog number AC16L121.

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