多线染色体上可以看见膨胀而成的小泡，即是疏松区。疏松区部分是紧密缠绕的DNA分子松开，基因正在活动的部分，基因活动的结果产生RNA，所以疏松区部分总能检查到RNA。
结果表明：磨削损伤的主要形式有显微塑性变形磨痕、断裂剥落坑、磨削微裂纹和材料疏松区的塌坑；
It is showed that:(1)the major surface damage patterns due to grinding are microplastic deformation trace, fracture chipping pit, microcracks, and subsidence in the loosen region of material;
钎焊焊缝的枝晶间显微疏松导致的应力集中与微裂纹效应以及近焊缝区母材晶粒长大是导管早期疲劳开裂的主要原因。
The results show that the crack initiates at the outer surface of the weld comer and propagates into the steel base material with a high cycle fatigue mode.
疏松的染色质区带主要位于细胞核的中心部。
Zones of loosely arranged euchromatin are located mainly in the center of the nucleus.
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