查询词典 chain reaction

Methods Expressions of MMP2 and TGF-β1 gene from 43 human suprarenal epithelioma patients' carcinoma and tumor-adjacent tissues were detected by semi-quantitative reverse transcription polymerase chain reaction.

应用半定量逆转录－聚合酶链反应检测43例肾透明细胞癌患者癌与癌旁组织MMP2和TGF-β1的表达水平。

Methods Semi -quantitative reverse transeriptase - polymerase chain reaction was used to examine the expression of BCRP gene in 62 cases of malignant hematologic diseases, BCRP/β2 - MG ratio was defined as BCRP expressible level.

方法应用半定量逆转录-聚合酶链反应，β2微球蛋白基因作内参照，以BCRP／β2-MG的比值作为BCRP基因的相对表达水平，检测62例恶性血液病BCRP基因的表达。

METHODS: Liver fibrosis models were established in 24 SD rats by intragastric administration (7 g/kg) of alcohol (56°, 560 mL/L) every morning, and 10 normal rats served as controls. The rats in model group were killed by exsanguination from femoral vein at 4, 12 and 24 wk. Pathological changes of liver tissues in rats were identified by Masson staining, and the expression of VEGF mRNA was detected by semiquantitative reverse transcription-polymerase chain reaction.

56度的白酒(560 mL/L)平均以7 g/kg的剂量每日早晨灌胃一次制备肝纤维化模型，灌胃4 wk、12 wk及24 wk采用股静脉放血法分别处死大鼠，观察肝脏病理变化并采用半定量逆转录聚合酶链反应检测VEGF mRNA的表达。

Mainly use the -235 uranium or plutonium -239 and other heavy nuclei fission chain reaction mechanism made of nuclear weapons, known as fission weapons, or atomic bomb.

主要利用铀－235或钚－239等重原子核的链式裂变反应原理制成的核武器，叫做裂变武器，或称原子弹。

Atomic bomb: In fission weapons, a mass of fissile material is rapidly assembled into a critical mass, in which a chain reaction begins and grows exponentially, releasing tremendous amounts of energy.

原子弹：裂变武器大规模的裂变材料正在迅速集结成一个临界质量，其中连锁成倍增长，并开始，数额巨大能量释放出来。

But in nuclearreactors, which contain far less fissionable material, the chain reaction andthe release of energy are carefully controlled.

但在核反应堆里，可裂变的材料很少，链式反应和能量的释放都被小心的控制。

Anuncontrolled chain reaction within a large amount of fissionable material canlead to an explosive release of energy, as in nuclear weapons.

大量的可裂变的材料中发生不受控制的链式反应就会导致爆炸以释放能量，这就是核武器的原理。

The term "critical mass" originally came from the world of physics, where it was originally defined as the amount of fissionable material needed to maintain a fission chain reaction. It's since been adopted as a more general term,"the minimum amount required to start or maintain a venture."

"临界质量"一词来自物理学，原意为发生裂变链式反应所需的最少质量，后引申为更为宽泛的"成就或维持某项事物所需的最低数量"之意 [6] 。

The study cloned the flic gene of App and performed sequencing and analysis of biological information. Polymerase chain reaction PCR was used to amplify the flic gene from.

构建猪传染性胸膜肺炎放线杆菌(Actionobacillus pleuropneumoniae， App)鞭毛蛋白编码基因的重组表达质粒，对其编码蛋白进行生物信息学分析，并将其在原核细胞中进行表达。

Objective:To develop a real-time florescence quantitative polymerase chain reaction method for quantitation of circulating DNA in plasma and explore its value in the diagnosis and prognosis of breast cancer.

目的：建立一种荧光定量PCR方法用于血浆循环DNA定量，并讨论血浆循环DNA检测在乳腺癌诊断及预后中的意义。

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％。