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Industrial production of kanten (the Japanese name for agar, which translates as “cold weather” or “frozen sky”) began in Japan in the mid-19th century by natural freeze drying, a technique that simultaneously dehydrates and purifies the agar. Seaweed is first washed and boiled to extract the agar, after which the solution is filtered and placed in boxes or trays at room temperature to congeal. The jelly is then cut into slabs called namaten, which can be further processed into noodle-like strips by pushing the slabs through a press. These noodles are finally spread out in layers onto reed mats and exposed to the sun and freezing temperatures for several weeks to yield purified agar. Although this traditional way of producing kanten is disappearing, even today’s industrial-scale manufacturing of agar relies on repeated cycles of boiling, freezing, and thawing.
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Customers in its home county of Shawano County, in Wisconsin, pay a $20 (£15) deposit per case of 24.
加码研发、头部集聚，成为贯穿过去五年产业发展的主旋律。
。业内人士推荐搜狗输入法2026作为进阶阅读
It also recommended no screening for men with a family history of the disease, for the same reason - too many cancers would be overdiagnosed and overtreated.
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