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From the late stage of third instar till fifth day of fifth instar, it is interesting to note that THC increased shortly before and after ecdysis and thereafter decreased to a basal level.

从三龄末期到五龄第五天期间，亚洲玉米螟幼虫的THC在蜕皮前后会下降，蜕皮后12小时左右降到最低点然后慢慢回升。

From the late stage of 3rd instar till the 5th day of 5th instar, THC increased shortly before and after ecdysis and thereafter decreased to a basal level.

从三龄末期到五龄第五天期间，幼虫的THC在蜕皮前后会下降，蜕皮后约12h降到最低点，然后又慢慢回升。

The molecular weights of the 11 major bands were 82, 79, 60, 51, 46, 38, 32, 30, 28, 24 and 18kD, respectively. The results of Western blotting with the positive serum of anaphylactic patients showed that the 1st-4th instar larvae all had the specific allergens whose molecular weights were 82 and 79kD, respectively; only the 5th instar larvae all had the specific allergen of 30kD. We purified the protein of 30kD by ion exchange chromatography and gel isolation and identified it as ectoblast protein by MALDI-TOF-MS.

选用家蚕过敏患者阳性血清进行免疫印迹，1~4龄家蚕均显示出82和79kD的特异性变应原；但只有5龄家蚕的30kD蛋白为特异性变应原，通过离子交换层析和经切胶纯化出30kD蛋白，再经MALDI-TOF-MS鉴定该蛋白为外膜蛋白。

The results indicated that there was no significant difference in hemolymph proteins between irradiated individuals and the controls. Only the concentration of 70kD proteins in irradiated silkworms were observed higher at day 0 of the 5th instar and lower at the later stage of the 5th instar than those of the respective controls.

但在成分分析时发现，5龄起蚕血淋巴中70kD附近的3条蛋白质谱带比对照蚕的浓度要高，随着个体的发育两者的浓度都上升；5龄后期则相反，对照蚕的浓度比照射蚕高；脂肪体中贮藏蛋白质的含量具有相似的变化趋势。

The developmental period of parasitoids on the 1〓 instar is the longest, and on the 4〓 instar is the shortest.

和双斑蚜小蜂的发育历期随着温度的升高而缩短，超过32℃，发育历期逐渐延长。

The theoretical optimum temperature for the development of eggs,young instar larvae,old instar lar...

本文研究了甘蓝、荷藕、山芋、大豆等不同食料条件下斜纹夜蛾的龄年发育结构的两性生命表参数，在25℃下，这4种食料条件下的内禀增长率分别为0.1836、0.1719、0.1778、0.1206。

The body weights of SSB fed on control rice after feeding on KMD1 for 36h were very significantly lower on day 0 and day 3, and significantly lower on day 9, compared with those of the control. Parasitism rates of host larvae fed on KMD1 by Apanteles chilonis were significantly (3th instar) or very significantly (4th and 5th instar) lower than those of the control host.

二化螟绒茧蜂寄生取食过KMD1的二化螟后，三个龄期幼虫的寄生率都显著下降，其中4龄和5龄达极显著水平；3龄和4龄上的结茧率显著低于对照；蜂蛹历期均短于对照，但仅3龄差异显著；从5龄幼虫所羽化的雄蜂寿命显著短于对照；蜂茧长显著短于对照；而对卵+幼虫期、茧块大小、蜂羽化率及性比均无显著影响。

Wing bud differentiation initiated at the early 5th nymphal instar, during which the front wing bud cells in the macropterous proliferated much more rapidly than those in the brachypterous. The hinder wing buds of the brachypterous degeneratd at middle 5th instar and finally turned out to be very little wings.

在5龄初始时才发生翅芽发育的分化，之后，短翅型若虫的前翅芽细胞增殖速度明显慢于长翅型，到五龄末期，细胞数量积累明显少于长翅型，短翅型的后翅芽在5龄中期开始退化变短，羽化后变成一个退化的小翅。

The rate of death and development duration of 1st instar,2nd instar,adult female,pre—oviposition and onegeneration of Dactylopius COCCU~Costa were studied under constant temperature.

在不同温度条件下测定了胭脂虫一龄若虫，二龄若虫，成虫，雌成虫产卵前期及全世代的死亡率和发育历期。

To the secondinstar larvae, by dropping on the pronotum and toxicant membrane, the LD50 was 0.015μg/larva and 1.41g/cm^2 at 96h after treatment, respectively. From the second instar, silkworms were fed continuously on mulberry leaves immersed of triazophos solution of different concentration, the LC50 at 24 HAT, 48 HAT, and at the beginning of the third, fourth and fifth instar was 2.38, 1.54, 0.97, 0.74 and 0.53mg/L, respectively.

结果表明，采用点滴法与药膜法，25℃条件下药剂处理后96h，三唑磷对家蚕2龄幼虫的接触LD50值分别为0.015μg/头与1.41μg/平方公分。2龄起蚕开始，于25℃条件下用三唑磷处理的桑叶饲养，在药剂处理后24、48h以及3龄起、4龄起、5龄起，三唑磷对家蚕的LC50值分别为2.38、1.54、0.97、0.74、0.53mg/L。

According to the clear water experiment, aeration performance of the new equipment is good with high total oxygen transfer coefficient and oxygen utilization ratio.

曝气设备的动力效率在叶轮转速为120rpm～150rpm时取得最大值，此时氧利用率和充氧能力也具有较高值。

The environmental stability of that world - including its crushing pressures and icy darkness - means that some of its most famous inhabitants have survived for eons as evolutionary throwbacks, their bodies undergoing little change.

稳定的海底环境─包括能把人压扁的压力和冰冷的黑暗─意谓海底某些最知名的栖居生物已以演化返祖的样态活了万世，形体几无变化。