Guar gum, a plant colloid, costs less than agar and is better suited for growing thermophilic bacteria, but is also more difficult to handle, being more viscous and less transparent. The bacterial polysaccharide xanthan is cheaper as well but forms weaker jellies that, as with carrageenan, might result in puncturing its surface. Other colloids, like alginate (from brown seaweed) and gellan gum (from a bacterium), don’t set solely based on temperature and require additives for gelation. These additives might interfere with microbial growth and make the preparation of those jellies less handy than agar plates.
Amu說，身邊的越南同事為了償還仲介債務，幾乎不眠不休，每天僅睡兩小時，假日也不出門，只要雇主要求便立刻上班，靠藥物與補品支撐體力。
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# 1Password path:
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