条件性抑制 条件性抑制又称内抑制,它是在后天一定条件下逐渐形成起来的。条件性抑制主要有消退抑制和分化抑制两种。 1、消退抑制。消退抑制是指条件反射由于没有受到强化而发生的抑制。 2、分化抑制。只对条件刺激物加以强化,而对与其近似的刺激物不强化,经过若干次后,只有条件刺激物才能引起条件反射性反应,近似刺激物引起的反应受到抑制,这种抑制称为分化抑制。
它可以帮助加强国际协调,如果所有粮食出口国都能无条件地承诺不采取出口禁令或抑制性的出口税的话。
It would help strengthen international coordination if all grain exporting countries unconditionally pledged not to apply export bans or prohibitive taxes for exports.
在前三种底物条件下,当高底物浓度时,L-苯丙氨酸表现出反竞争性抑制作用; 低底物浓度时,则呈现激活作用。
As the former three substrates were employed, at high substrate concentration, L-Phe inhibited the enzyme uncompetitively and activated the enzyme at low substrate concentration.
试验结果表明小麦在低磷条件下对菌根的依赖性很低,而在高磷条件下生长受到菌根侵染的抑制;
Results indicated that plant growth of wheat responded little to AM at low P application, while it was inhibited at high P application.
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