However, many classes of oligonucleotides are polyanions, so they cannot cross over cell membrane.
但是, 大多数此类化合物是呈负电性的, 不能有效跨越细胞膜.
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目的研究丝氨酰-天冬氨酰-谷氨酸 ( SDE ) 负电性三肽仿生吸附剂对低密度脂蛋白 ( LDL ) 的吸附.
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As these electrons are negatively charged they will attempt to repel each other.
因为这些电子都是带负电荷的,它们会互相排斥。
《柯林斯高阶英汉双解学习词典》
Outward currents therefore increase electronegativity in the cell interior.
外向电流因此能增加细胞内的负电性.
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Hyperpolarization and repolarization both describe increased electronegativity within the cell.
超极化及再极化都表明细胞内负电性的增强.
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Objects and as a result of friction with the electricity, is not positive is negative.
物体因摩擦而带的电, 不是正电就是负电.
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彼此 ( 正电及负电 ) 互相吸引就会导致物体相吸, 这就是所谓的静电.
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The drops are usually negatively charged, but occasionally one with a positive charge is found.
这些油滴一般都带负电, 但偶尔也发现有带正电的.
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Dusty plasmas consist of electrons, ions and usually negatively charged dusty micro-particles.
其基本成分除了电子和离子外,还包括通常带负电的尘埃微粒.
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包括有静电场 、 负电场 、 低频 场 、 高周波、负离子 、 远红外等.
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Salt is made of two ions: positively charged sodium and negatively charged chloride.
盐是由带正电的钠离子和带负电的氯离子构成的.
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Thus, glass becomes positive, while the silk with which the glass was rubbed becomes negative.
例如, 玻璃与丝绸摩擦时,玻璃带正电, 而丝绸带负电.
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A body is negatively charged when it has electrons in excess of its normal number.
物体所含电子超过其正常数目时,该物体就带负电.
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One end of each molecule had a charge and the other end had a negative charge.
每个水分子的一端带上正电荷,而另一端带上负电荷.
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The remaining negative charge can be spread out, or delocalize over three atoms.
剩下的负电荷被分散或离域遍及到三个原子.
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Dirac's theory also predicted a negatively charged sister for the proton, called the antiproton.
狄喇克的理论还预言有一种质子的姐妹粒子,带负电荷, 叫做反质子.
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