负电荷

电子带负电荷，质子带正电荷。

An electron has a negative charge , a proton has a positive charge .

结果表明：（1）从赤红壤、红壤到黄棕壤，永久负电荷量（CECp）趋于增大，主要与土壤的粘土矿物组成和粘粒含量有关；

ResultS showed that : ( 1 ) From lateritic soil , red soil to yellow brown soil , the Permanent negative charge amount ( CECp ) which chiefly relates to soil clay mineral composition tends to increase ;

因为这些电子都是带负电荷的，它们会互相排斥。

As these electrons are negatively charged they will attempt to repel each other .

正极带正电荷，负极带负电荷。

The positive pole carries a positive charge while the negative pole does a negative charge .

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。

Dirac 's theory also predicted a negatively charged sister for the proton , called the antiproton .

电子是带负电荷的，质子是带正电荷的

Electrons are negatively charged with electricity , protons are positively charged .

电子带负电荷

Electrons are negatively charged with electricity .

通过与DNA的作用实验，我们发现正、负电荷可以有效地增加卟啉和DNA的相互作用。

The positive charge can improve the affinity of porphyrin to DNA .

提高3′位C原子的负电荷和增大分子偶极矩将有助于提高化合物的抗癌活性。

Improving the negative charge at position 3 ′ and molecular dipole moment can increase the anticancer activity .

DNA的磷酸骨架所带的负电荷只能与表面带正电性的载体结合。

The negatively charge of phosphate backbone of DNA could be binded to the positively charged of vector .

由于结构内存在大量磷酸基团DNA和RNA带负电荷。

DNA and RNA carry a net negative charge because of the numerous phosphate groups in their structure .

蛋白质随着PH值不同携带不同电荷，但当某些化学试剂存在时会带负电荷。

Proteins carry a charge that changes with pH , but becomes negative in the presence of certain chemical detergents .

氨基酸在低ph值下带正电荷（阳离子），在高ph值下带负电荷（阴离子）。

Amino acids are positively charged ( cationic ) at low pH and negatively charged ( anionic ) at high pH.

负电荷总是，总是等于负单位电荷，Q2，is，always，equal，to，minus，e，因为这是一个单电子系统。

And the negative charge is always , Q2 because it 's a one electron system .

等电点pHpzc是当吸附剂表面的正电荷与其表面的负电荷数量相等时，溶液的pH值。

It is a pH value when the quantity of positive charges on a sorbent surface just equals that of negative charges .

背景及目的：壳聚糖是一种广泛存在于自然界的阳离子多聚糖，易与带负电荷的DNA结合形成复合体。

Background & Objective : Chitosan is a cationic polysaccharide widely found in nature , and formed a complex with gene through the strong electrostatic interaction .

CrO42-对表面正电荷的影响程度随体系pH的增加而减小，对负电荷的影响呈相反的趋势。

The effect on positive surface charge increased with the decrease in pH , while an opposite trend was observed for negative surface charge .

结论具有亲电子集团的GMA能与DNA带负电荷中心反应形成GMA-DNA加合物。

Conclusions GMA with electrophilic group could react with negatively charged centers on DNA and form GMA DNA adducts .

2）插层剂插层降低了蒙脱石晶格负电荷，降低了蒙脱石与Cr（Ⅵ）阴离子的静电斥力，更有利于吸附的进行；

2 ) The negtive charge of montmorillonite is reduced after intercalation and thus the electrostatic repulsion between Cr (ⅵ) and montmorillonite is reduced .

这些结果进一步表明抗癌中草药靛玉红通过插入到DNA的双螺旋链中以及与带负电荷的磷酸骨架通过静电或生成氢健来干扰DNA的合成，从而达到了抗肿瘤的效果。

The results indicate that the herbal drug indirubin can interfere with the DNA by intercalating into the double helix of DNA and interacting with the phosphate groups of DNA .

R基团赋予氨基酸物理化学特性，例如极性（亲水性和疏水性）以及电荷（酸性或正电荷，碱性或负电荷）。

The R-groups give the amino acids their physical-chemical characteristics such as polarity ( hydrophobic or hydrophilic ) and charge ( acidic or positive versus basic or negative ) .

研究了带有正电荷的TiO2胶体颗粒在带有负电荷的聚电解质多层膜表面的组装，通过改变膜表面性质来控制胶体颗粒，从而实现可控密度的短程RSA有序分布。

We studied the assembly of TiO_2 colloid with positive charges on the polyelectrolyte self-assembly multilayers with negative charges .

该化合物和同时带有四个负电荷的卟啉（17）相比，在对DNA的切割时有着明显的优越性。

In the DNA cleavage experiment , zwitterionic water-soluble porphyrin ( 16 ) has more stronger ability to cleavage DNA than that of tetrasulfonatephenyl porphyrin ( 17 ) with four negative charges .

其原因是带负电荷的污染物颗粒和吸附于织物上而本身又带负电荷的CMC分子之间存在着静电斥力。

Because the action of static between fomite granule with minus charge and CMC molecule with minus charge itself .

红壤胶体与褐土胶体表面负电荷有不同程度的增加，最高达1.24cmol／kg；

White the amounts of negative charge in red soil colloid and cinnamon soil colloid increased in different degree , even as high as 1.24 cmol / kg .

尽管在通常的pH条件下，腐殖酸与粘土矿物都带负电荷，但它们之间仍可通过配位交换作用、阳离子键桥、疏水性作用等机制结合成有机-无机复合体。

Although in usual pH conditions , humus and clay minerals were negatively charged , but they can through the ligand exchange , cationic bridge and hydrophobic to combined organic-inorganic complexes .

2供试恒电荷土壤的可变负电荷量比可变电荷土壤的大，且都随体系pH的提高而增大；

The amount of variable negative charge of permanent charge soil is higher than that of variable charge soils , and enhanced with the increase of pH value in the system .

在1%的NaCl溶液中，碳钢电极表面带有过剩的负电荷；

Carbon steel and stainless steel carry negative and positive excess charges when they are immersed in 1 % NaCl solution , respectively .

Ti3N中随着N的配位数增加，N的负电荷增加，平均每个Ti向N提供约0.3个电子。

The negative charge of N was increased with its number of coordinate in Ti_3N , and every Ti atom af-forded about 0.3 charge to the N atom .

发现二氧甲基基团具有较大的O原子负电荷及C原子正电荷，且空间位阻较小，因此成为决定五味子素抗氧化活性的关键因素。

And it was found that dioxo-methyl group was a key factor to determine the antioxidant activity of DCLs , because its O and C had rather high net charge and its steric hindrance was rather low .