头壳

对幼虫头壳大小有明显的影响；

It had the obvious influence on the larva head capsule size .

琥珀蚕幼虫的外形与柞蚕属其他昆虫极为相似，幼虫头壳宽是按照一定的比例（1.3～1.4）成几何数增长。

The shape of larva of muga silkworms is very similar to those of other insects belonging to Antheraea . The head capsule width of larvae grows geometrically according to a certain proportion ( 1.3-1.4 ) .

在DNA被包装到头壳内后，该马达脱落，病毒尾连接到头壳上。

After the DNA is inside the capsid , the motor falls off , and a virus tail attaches to the capsid .

这一过程将DNA链向上拖入头壳中，从而保护其不受损伤，使病毒能够存活以及进行繁殖。

The process draws the DNA strand upwards into the capsid where it is protected from damage , enabling the virus to survive and reproduce .

目的：建立大头金蝇（Chrysomyiamegacephala，C.megacephala）成虫头壳蝶啶含量的分析方法。

Objective : To develop a method for pteridine fluorescence analysis in adult Chrysomyia megacephala ( C.megacephala ) .

热固齿钎头壳体用钢Q45NiCr1Mo1VA钢物理及机械性能

Physical and mechanical properties of Q45NiCr_1Mo_1VA steel used in rock drilling bits

最后对动力头壳体进行了工艺编制。

Finally , the driving force of the first shell was prepared .

雄幼虫的体长变化为0.3～3.46cm，头壳宽度变化为0.7～3.62mm：成虫雌雄比为1：1.5；

The body length and the head capsule width of male larvae varied from 0.3 ~ 3.46 cm and 0.7 ~ 3.62 mm respectively .

当外磁体接近传感头时，传感头壳体内铁翻板转动银点接通输出一组开关信号。

When external magnet approaches the sensing head , the iron platform trap door in the shell body of the sensing head will rotate the silver junction and output a group of switching signal .

电镜观察初步表明，这些细菌素可能是分子大小不同的两种类型的细菌素：小分子细菌素在电镜下不可见，大分子细菌素具有短杆状结构，颇似无头壳的噬菌体的尾部。

Electron microscopic ( EM ) observations showed that these bacteriocins may include two types : those with low molecular weight which were not visible by EM , and those with high molecular weight which had short rod particles , resembling bacteriophage tails .