张应力

Objective: Effects of a single period of mechanical strain on gene expression patterns of two osteogenic transcription factors, Ets1 and Cbfa1, in rat calvarial sutural osteoblast-like cells were studied in this study to elucidate the molecular mechanism of suture distraction.

结果：Ets1和Cbfa1的mRNA水平分别在机械张应力作用后6 h及12 h内显著增高，随后，mRNA水平逐渐恢复到对照组水平，Ets1先于Cbfa1表达，在加力后表达立即升高，并在0.5h达到最高水平，而Cbfa1则首先经历一个短暂的潜伏期，后表达逐渐升高，在6 h达到最高水平，Cbfa1的最高表达水平约为Ets1的2.58倍。

The tensile force resulting from the tensile stress acting on a diagonal plane has historically been designated as diagonal tension.

拉力是由作用在对角面上的张应力产生的，曾被视为对角力。

Cracking of a metal resulting from the combination of hydrogen and tensile stress.

在氢和张应力的共同作用下金属发生的断裂。

However, the molecular events of osteoclasts in response to tensile stress are still not well understood so far.

但到目前为止，有关牵张应力导致破骨细胞生物学行为变化的分子机制尚不清楚。

Equinus deformity/surgery ; external fixators ; tension stress effect

马蹄足畸形/外科学；外固定器；张应力效应

Mechanical strain induced the osteoblastic differentiation of the MSCs, which may be attributedto the different gene levels.

张应力可诱导MSCs骨向分化，而差异表达的基因可能在这一过程中起重要作用。

This method uses the features of laser such as high-speed heating and cooling to implement scribing treatment on the oriented steel sheet surface so as to promote the generation of micro plastic deformation and high-density dislocation in its heated section, form the subcrystalline boundary, reduce its main domain wall length, and introduce residual tensile stress so obtaining the effects of refining magnetic domain and reducing iron loss.

降低硅钢片铁损的激光处理方法及装置。$该方法是利用激光快速加热和冷却的特点，对取向硅钢片表面做划线状处理，促使加热区产生微小塑性变形和高密度位错，形成亚晶界，减小主畴壁长，同时引起残余张应力，达到细化磁畴，降低铁损的效果。

The mid-oceanic ridge is accreting boundaries. The normal-fault ruptures indicate the tensive stress state in mid-oceanic regions.

大洋中脊是洋壳增生的地区，正断层型的地震破裂显示了洋中脊系的拉张应力状态。

In sputtered Ni/Al and Ni/Cr multilayers,X-ray diffractionindicatesan expansion of the Ni lattices along the growth direction, which results instress in the multilayers.

在溅射制备的一系列Ni/Al和Ni/Cr多层膜中，X-射线衍射表明Ni层晶格在沿其膜面发向上与体材料相比存在轻微的膨胀，这导致了在沿其膜面发向上存在张应力。

The results showed: cyclic stretch could induce cell apoptosis in a magnitudes and time dependent way.

结果表明：周期性张应力可以导致细胞凋亡，并呈强度和时间依赖性。

Breath, muscle contraction of the buttocks; arch body, as far as possible to hold his head, right leg straight towards the ceiling (peg-leg knee in order to avoid muscle tension).

呼气，收缩臀部肌肉；拱起身体，尽量抬起头来，右腿伸直朝向天花板（膝微屈，以避免肌肉紧张）。

The cost of moving grain food products was unchanged from May, but year over year are up 8%.

粮食产品的运输费用与5月份相比没有变化，但却比去年同期高8％。