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TTN was founded in 1987 in order to explore the capacities of the newly invented Hayes Modem in the field of digital translation management and translation routing. Since 1991 the system has been...

TTN, The Things Network is a global community of more than 110000 active members from over 100 countries around the world for LoRaWAN. In this chapter, I wanted to connect the DHT11 module to an Arduino board as the LoRaWAN node and transmit the …

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TTN（Total turnover number） 总转换数：代表循环过程的效率 即：在一个完整的反应过程中每mol辅酶可 以产生的产物的总mol数。 辅酶分子会在循环过程中受到破坏 一般TTN需要达到103～104，对于大规模生 产，最好能够达到105。

2019年5月11日 · 定向进化 (directed evolution) 是在试管中模拟自然进化过程，通过快速突变和重组等方式人为的产生基因多样性，然后按照特定的需要和目的给予选择压力，筛选出具有期望特征的蛋白质或者核酸。 这一概念是在上世纪90年代由美国加州理工学院的化学/生物/工程学家 Frances Arnold 教授提出的，并广泛运用于生物以及其交叉领域中，特别是酶工程领域。 因其在 “ 酶的定向进化 ” 中的开创性贡献，Frances Arnold教授获得了2018年的诺贝尔化学奖。 近年 …

2023年7月4日 · Transient tachypnea of the newborn (TTN) is a benign, self-limited condition that can present in infants of any gestational age shortly after birth. It is caused by a delay in the clearance of fetal lung fluid after birth, which leads to ineffective gas exchange, respiratory distress, and tachypnea.

TTN is a benign, self-limited disorder that occurs during the transition from uterine to extrauterine life and results from the delayed clearance of excess lung fluid. TTN was first described in 1966 when it was observed that a subset of newborns exhibited respiratory distress, consisting primarily of tachypnea, at or shortly after birth.