Sejttenyészetekbl
Sejttenyészetekbl is a term that appears to be a typographical error or a misspelling, most likely intended to be a phrase related to "tissue cultures" or "cell cultures" in a language other than English. The ending "bl" does not typically signify a known word or suffix in common scientific terminology. If it is a variation of a word in a specific language, it is not readily identifiable without further context.
Assuming it relates to cell or tissue cultures, this field of biology involves the in vitro cultivation