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Tuổi trẻ on MSN
4 天
Hóa chất trồng giá đỗ siêu tốc độc đến mức nào?
Hóa chất mà hai cơ sở sản xuất giá đỗ ở Quảng Ngãi vừa bị khởi tố sử dụng để trồng giá siêu tốc là chất 6-Benzylaminopurine - ...
智能制造网
5 天
简述纸厂及自备电厂自动化控制系统
通过检测进入打浆机的纸浆流量、浓度的参数,这两个参数相乘就是纸浆的绝干量。通过浓度信号来控制进未磨纸浆储槽的进清水量,从而达到控制进磨浆机纸浆浓度的目的。通过控制进磨浆机纸浆的阀门开度大小用来调整进打浆机纸浆的流量。 通过上面的控制 ...
来自MSN
4 天
甜度最高的竟然不是糖?
甜,是一种令人愉快的味道,让人产生幸福的感觉,其生物本质是甜味分子与甜味受体相互作用,经过复杂的传递过程然后激活大脑奖赏区释放神经递质多巴胺。从化学结构角度上看,甜味分子可分为:糖类(糖、糖衍生物、糖醇、糖苷),氨基酸类 (二肽 ...
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