In some cases, alternative gelling agents might provide faster results. Researchers observed that bacterial cellulose and another bacterial polysaccharide, Eladium, allow a 50 percent increased growth rate for various bacteria and yeasts (as compared to their growth on agar), including higher biomass yields or faster detectable biofilm formation. However, both substances are still not as cheap and readily available as agar.
这个北方的小县城，拥有更多的“进步”，有人离开，有人回来，人与人之间不如往日般亲密，但它的骨架依然没变。白天路过我上学时的幼儿园，还是那个幼儿园，小学还是那个小学。卖饼夹菜的老板，店面换了，但人还在，味道还在。一家超好吃的麻辣烫，开了几十年，妈妈跟我一样大时就在他们家吃。县城最大的超市，小时候就在那，今年过年依旧人山人海。它们都在变得越来越好，且依然在那里。
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