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This anomaly is indicative of the larger challenge of culturing various microbial species, referred to as microbial “unculturability.” This cannot be explained by the use of agar alone or by the substitution of an alternative gelling agent, but rather by the difficulties in consistently recreating on an agar plate the multi-variable environment in which microbes grow naturally. Given such challenges, the risk of shortages, and the vulnerabilities of the agar supply chain, why is it so difficult to find suitable alternatives?
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豫东平原的麦苗刚返青，风里还带着些许寒意。走进河南开封朱仙镇赵庄村，空气的味道却截然不同——那是一股醇厚清冽的松烟墨香，盖过了旷野的寒意，直往人心里钻。