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This functioned as a selective bridge, permitting the passage of positively charged sodium ions, but not negatively charged

这种溶血素起着一种选择桥梁作用，它只允许带正电的钠离子通过，而带负电的离子却不能。

This functioned as a selective bridge, permitting the passage of positively charged sodium ions, but not negatively charged chloride ions.

它可以作为有选择的桥梁让带正电的钠离子通过，同时阻止了带负电的氯离子。

Next, Dr LaVan and his colleagues installed a protein called alpha-hemolysin into the protocell membrane. This functioned as a selective bridge, permitting the passage of positively charged sodium ions, but not negatively charged chloride ions.

接下来，拉文和他的同事们在原细胞的细胞膜中加入了一种叫阿尔法溶血素的蛋白质，这样就建立了一个选择性的通道——允许正极的钠离子通过，却阻止负极的氯离子。

The inoculation effectiveness of fungi varied with soil types,especially for BEG167.BEG167 performed positively on cinnamon soil,and neutral on brown soil,but negatively on red soil.Except for BEG150 all All other fungi,except BEG150,increased maize P uptake on cinnamon soil and brown soil,however,only BEG168 and BEG 141 improved P uptake significantly on acidic soil.

若以真菌的根外菌物量作为衡量AM真菌菌株土壤生态适应性的指标，BEG141和BEG167是生态适应性强的菌株，为广幅生态型菌株；菌株BEG168和BEG151次之，前者在棕壤上适应性高，后者在红壤上适应性高。

The correlation coefficients of 12 of the 35 meteorological factors with wheat yield were significant at the 0.05 level. The precipitation during filling stage and winter wheat yield was significantly corelated, and the direct path coefficient was the highest, and it contributed the most to wheat yield, followed by the precipitation of elongating stage and turning green period. The evapotranspiration in April and May negatively correlated significantly with winter wheat yield at the 0.05 and 0.01 levels, respectively.

在与小麦产量相关的35个气象因子中，有12个因子的相关系数达到了显着或极显着水平，其中灌浆期降水与冬小麦产量呈极显着相关，且直接通径系数最高，对小麦产量贡献率最大；其次是拔节期降水量和返青期降水量；4、5月份的蒸发量与冬小麦产量密切相关，分别接近显着和达到极显着水平，它们对小麦产量形成起较大的负向作用；小麦越冬期间的气温也是不可忽视的气象因素。

The stemwood growth (D2H) was positively related to total leaf area, surface area of crown and crown shape ratio, but negatively related to leaf area index and crown layer density.

材积生长与全树总叶面积TLA、树冠表面积TCA和冠型率CSR呈极显著正相关而与叶面积指数LAI、冠层密度CLD呈负相关。

The improved positively and negatively corona charged PTFE film electrets not only have a comparable charge storage density but also similar rule for their charge storage and decay in certain temperature region.

经改性后的正、负极性PTFE薄膜驻极体不仅具有相近的电荷储存密度，而且在一定的温度区间内它们的电荷储存和衰减呈现类似的规律。

Two other food ingredients which can negatively affect an individual with diabetes are salt and sugar.

其他两个食品成分可能产生负面影响的个人与糖尿病是盐和糖。

The performance grades in balance beam of B6-Co normal mice, B6-Co single eyed ones and B6-Co double-eyed ones were decreased sequentially, and were negatively correlated with the degrees of cornea lesion.

平衡木的成绩得分：B6-Co表型正常小鼠3.50±0.69、B6-Co单眼小鼠2.17±0.78、B6-Co双眼小鼠1.87±0.80依次降低，且与角膜病变的程度呈负相关。

N-use efficiency at mature stage were significant- negatively correlated with N-content of ear, leaf and sheath, N-accumulation and N- distribution ratio of leaf and sheath at late grain-filling stage and were significant-positively correlated with N- distribution ratio of ear at late grain-filling stage.

籽粒灌浆不同时期的氮素利用效率品种间呈显著差异，其中成熟期氮素利用效率与成熟期穗和鞘叶氮素含量、鞘叶的氮素积累量和鞘叶氮素分配比例呈显著的负相关，与灌浆中后的穗氮素积累分配比例呈显著的正相关。

However, as the name（read－only memory）implies, CD disks cannot be written onorchanged in any way.

然而，正如其名字所指出的那样，CD盘不能写，也不能用任何方式改变其内容。

Galvanizes steel pallet is mainly export which suits standard packing of European Union, the North America. galvanizes steel pallet is suitable to heavy rack. Pallet surface can design plate type, corrugated and the gap form, satisfies the different requirements.

镀锌钢托盘多用于出口，替代木托盘，免薰蒸，符合欧盟、北美各国对出口货物包装材料的法令要求；喷涂钢托盘适用于重载上货架之用，托盘表面根据需要制作成平板状、波纹状及间隔形式，满足不同的使用要求。