nanogram

1. The first test they did was with a virus dose of one nanogram.
   他们做先将1纳克剂量的病毒做为实验的第一步。
2. After magnetite incorporation, the porous microparticle is still empty enough to accommodate nanogram quantities of a molecular payload;
   结合有磁铁矿的多孔微粒仍然具有足够的空间负载纳克量的分子；
3. It presents a simple method was presented for the separation and preparation of insect pheromones at the nanogram level by using gas chromatography ( GC).
   报道一个用于昆虫外激素研究的简单快速气相色谱分析制备方法。
4. The limit of determination ranks nanogram level.
   方法的检出限在纳克级。
5. The measurement method of the isotopic abundance ratios for the nanogram samarium was performed by Finnigan MAT 262-RPQ thermal ionization mass sepctrometer.
   本文简介了使用FinniganMAT262热电离质谱仪对超微量钐天然同位素丰度比的精密测定。
6. Two new separation and preconcentration methods are devised, and determination of nanogram levels of Se and Te in rock samples is realized by making use of AFS.
   从而建立了两个新的Se、Te分离富集体系，使原子荧光测定达到纳克量级。
7. Determination of Nanogram Quantities of Mercury by Induced Reaction
   用诱导反应测定微量汞
8. Determination of Nucleic Acid at Nanogram Level by Resonance Light Scattering of Ferric Nanoparticle
   铁纳米粒子共振光散射测定纳克级核酸
9. The Determination of Nanogram Amounts of Heavy Metal Elements in Highly Pure Barium Nitrate by Extraction-GFAAS
   小体积萃取-石墨炉原子吸收法测定高纯硝酸钡中纳克级重金属元素
10. Determination of Nucleic Acids at Nanogram Levels with Tetra-substituted Amino Aluminum Phthalocyanine by a Resonance Light-scattering Technique
    用四氨基铝酞菁共振光散射技术测定纳克级核酸
11. Silver staining for detection of nanogram amounts of proteins and nucleic acids in gels
    凝胶中痕量蛋白质和核酸的银染色法
12. The QCM sensor is a mass testing device in the level of nanogram.
    QCM传感器是一种可以检测微小质量（纳克级）变化的仪器。
13. In the ELISA test, the expression of antibody part is not high, but the expression of interferon has been reached nanogram ( 10-9g) level, the maximum reached 9ng/ ml, the concentration of the general role of interferon only picogram ( 10-12g) level.
    经ELISA检测，抗体部分的表达量不高，但干扰素的表达却已经达到了纳克（10-9g）级，最高已达9ng/ml，而一般干扰素的作用浓度只需皮克（10-12g）级。

noun

1. one billionth (1/1,000,000,000) gram

   Synonym:    ng