strain concentration factor 中文意思是什麼

strain concentration factor 解釋
應變集中系數
  • strain : vt 1 用力拉,拉緊,抽緊,扯緊。2 使緊張;盡量使用(肌肉等)。3 強迫,強制;濫用,盡量利用。4 拉傷...
  • concentration : n. 1. 集中。2. 【化學】提濃,蒸濃,濃縮;濃度;稠密度;【礦物】汰選,選礦,富化。3. 集中注意,專心。
  • factor : n 1 〈英國〉經銷人;(代客買賣收取傭金的)經紀人;代理商;代辦人;〈蘇格蘭語〉 土地經管人。2 要素...
  1. Induced either by iptg or l - tryptophan in the absence of easily metabolized carbon such as glucose the strain bl21 ( de3 ) / pet28c - tnaa can express tryptopanase. the fermentation conditions were optimized respectively. in the presence of glucose and iptg as induce agent, the concentration is the crucial factor for expression of active tryptophanase. if the iptg concentration is less than 0. 2mm, the optimum temperature is 37 lower temperature is necessary to obtain active tryptophanase in the case of higher concentration of iptg

    用iptg誘導表達實驗結果表明:利用t7啟動子在胞內能表達出有活性的酶; iptg與溫度的合適組合可以得到較高活性的色氨酸酶,在0 . 2mm以下濃度的iptg誘導時, 37是最適溫度,而用較高濃度的iptg誘導,低溫是表達有活性的色氨酸酶的必要條件,而且誘導時間要短。
  2. Firstly, the existing extrapolating method of stress concentration factor from measured neighboring stress or strain is reviewed briefly, then, course of gm ( 1, 1 ) model, error source and criterion of examining precision are introduced

    文中首先對已有的應力集中外推方法作了簡要概述,然後,介紹了灰色系統理論gm ( 1 , 1 )模型的建模過程、誤差來源及精度檢驗標準。
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