Dual gene amplification and selection system with dihydrofolate reductase and glutamine synthetase genes effectively increase the foreign gene expression

The results have shown that this electrochemical biosensor based on dual signal amplification can detect target DNA with an improved sensitivity and selectivity. The linear range is from 100 pM to 10 nM with the detection limit of 33 pM.

实验结果表明，这个基于双重信号放大反应的电化学生物传感器可以非常灵敏和特异地检测目标核酸，线性范围从100pM到10nM，检测限为33pM。

The audio power amplifier uses integrated chip LM 386, the voltage amplification factor is 200 most greatly.

音频功率放大器采用集成芯片LM386, 电压放大倍数最大为200.

The affection of compliant match of two microleverage on amplification factor is analyzed.

分析了两级杠杆机构的柔性匹配对位移放大微杠杆机构放大倍数的影响.

Wangjing Yang , deputy director of clinical laboratory examiner. Good clinical immunology testing, clinical gene amplification testing.

王景阳检验科副主任检验师. 擅长临床免疫学检验 、 临床基因扩增检验.

Voice amplification circuit design is composed of Pre-amplification circuit, Active filter circuit and power amplification circuit.

语音放大电路由前 置 放大电路 、 有源滤波电路和功率放大电路三部分组成.

In screening technology asas color image in differenc dot have amplitude modulation and FM screening.

在增网技艺洋,表示不黑白图像条理的网点有调幅和调频增网.

EYS was the key basis of spinning technology determination direction and amplitude modulation.

原丝的拉伸率是确定纺丝工艺调整方向和幅度的重要依据.

Amplitude modulation ( AM ): The form of modulation.

调幅: 调制的一种形式.

The number atthe end of each trace is the peak amplitude of the observation in millimeter.

每条轨迹终点的数字是观察到的振幅峰值(以毫米表示).

To facilitate testing system frequency characteristics, output amplitude frequency characteristics and waveform distortion.

为便于测试系统的频率特性, 要求输出幅频特性平和波形失真小.

The spectrum amplitude of time delay disturbed signal equals to that of the original signal.

随机时脉迟延造成之受扰讯号其频谱强度与原讯号频谱相同.

This paper presents a new method of measuring difference: sampling numerical and self-power-spectrum amplitude correction method.

本文提出一种测量同频率正弦信号相位差的新方法: 采样数字和自功率谱幅值校正相位差测量法.

ObjectiveTo explore the autogenic training and suggestion in changing finger temperature, HR and T-wave amplitude.

目的对照研究在自生训练和暗示指温升高的过程中,手指温度 、 心率、心电图T波幅度的变化情况.

Coupon book: An oldy but a goody.

赠券书：老而实用。

We could also sub in Gale Storm, former star of the golden oldy TV sitcom "My Little Margie, " who died Saturday.

我们还能加上GaleStorm，他是以前的黄金档电视剧《我的小玛吉》中的明星演员，死于周六。

Objective To probe the relationship between replantation of multi-finger amputation and function restoration.

目的探讨多指再植与功能恢复的关系.

In August 1664, four English warships arrived in New Amsterdam's harbor.

1664年八月, 四艘英国战船停泊在了新阿姆斯特港.

Manhattan was the site of the original Dutch settlement of New Amsterdam.

曼哈顿是荷兰人最早在新阿姆斯特丹建立的殖民地.

Alpha-amylase was one of important enzymes in industry field, and the activist fields in enzyme studying.

α - 淀粉酶是工业上应用的重要的酶类之一, 并且也是酶学研究中最活跃的领域.

Objective: It is well known that the intermittent administration of parathyroid hormone ( PTH) can promote bone formation, however the mechanisms of the anabolic effect of PTH on bone is far from clear.

目的：间隙性PTH应用于大鼠和人都可以促进骨形成，但是其作用机理尚未明确。