同位素

Results:The method of cell proliferation is more sensitive than that of isotope releasing test.

结果：该方法较同位素试验方法更敏感。

Applications of organic carbon isotope to paleoenvironmental research were introduced.

介绍了有机碳同位素在古环境研究中的应用。

As an indicator of shifts in the Earth's climate, the isotope record has two advantages.

作为地球气候变化的一个指示，同位素记录有着2个有点。

It is rare in nature because all its isotope s are short-lived and because radium, its source, is scarce.

在自然界很稀少，因为它所有的同位素都是短寿命的，还因为它的来源是稀有的。

Thermal evolution, which means thermal evolution has no significant influence on kerogen carbon isotopes of coal measure strata.

这说明热演化作用对煤系地层中干酪根的碳同位素组成将没有明显的影响。

In the meantime, we proposed a mechanism for this catalytic reaction. According to the possible formation of intermediate B, we designed a disubstituted ketene of more function to re-capture the zwitterion.

在同位素标记基础上，我们推测了这个N-甲基咪唑催化的二组分反应可能的机理，并根据此机理设计用一个二取代的烯酮来捕捉N-甲基咪唑和DMAD形成的两性离子。

The characters of geochemistry are rich alkali. And at the same time the content of calcium is high. They are rich in alkali, high in Potassium, enriched in LILE, LREE and Pb, depleted in HFSE and have a small Sr, Nd, Pb isotope range. Their source is probably a kind of even metasomatic mantle. This is consistent with the fact that there is kimberlite containing flogopite in the deep-source enclosure of Cenozoic super-K alkali lava in the southern part of this rock zone.

组成这些钾质碱性岩带的岩石：在岩相上，包括深成相、浅成相和喷溢相等不同岩相；在岩性上，从超基性、基性、中性到酸性岩石；造岩矿物，从超基性到酸性岩石中均有透辉石，在基性、超基性岩中有霞石；在岩石化学成分上，所有岩石均表现出富碱高钾富钙，微量元素富集Rb、Sr、Ba等大离子亲石元素和Th、U等放射性元素，贫Nb、Ta、Zr、Hf等高场强元素；稀土元素富集轻稀土，铕负异常不明显；Sr、Nd、Pb同位素组成，显示了物质来源于富集地幔源区。

People through nuclear reactions, have been synthesized 17 kinds of atomic number greater than 92 of the transuranic elements, and thousands of The new kinds of radioactive nuclides, and by high-energy and ultra-high energy-ray beam and the interaction of atomic nuclei and found hundreds of kinds of short-lived particles, namely, baryon, meson, lepton, and particle resonance states of these particles has led to a new field of study - the birth of particle physics since the age of .70, nuclear physics has entered a deep development and wide application of new, more mature stage, on the one hand the development of particle acceleration and detection techniques, expanding people's research in nuclear means, the other hand, nuclear technology to serve the national economy, for example, for the development and utilization of nuclear energy to provide more accurate nuclear data; the use of isotope tracer technique diagnosis and treatment of disease; the use of radiation and irradiation preservation of food, irradiation breeding .

人们通过核反应，已经人工合成了17种原子序数大于92的超铀元素和上千种新的放射性核素，并且通过高能和超高能射线束和原子核的相互作用，发现了上百种短寿命粒子、即重子、介子、轻子和共振态粒子，对这些粒子的研究导致了一门新学科——粒子物理学的诞生。70年代以来，核物理进入了纵深发展和广泛应用的新的更成熟的阶段，一方面发展粒子的加速技术和探测技术，扩充人们研究原子核的手段，另一方面将核技术服务于国民经济中，例如，为核能的开发利用提供更为准确的核数据；利用同位素示踪技术诊断和治疗疾病；利用射线及辐照技术保存食品、辐照育种等。

The magmatic liquation type Cu-Ni sulfide deposits called before have been proved to be volcanic Cu-Ni deposits associated with pyroxenic komatiite, which is a new type Cu-Ni deposit in China.

从岩石序列、矿体产状、矿石构造和硫同位素等方面证明原称之谓正岩浆熔离Cu-Ni硫化物矿床是一种与辉石质科马提岩有关的火山岩型铜镍矿床，系我国一个新的矿床类型。

Carbon isotopic discrimination Δ~(13C of fossil Liquidambar is mainly related toenvironmental factors, such as irradiation, temperature, other than atmospheric CO_2concentration and water availability.

校正后的化石枫香碳同位素分馏值△~(13C受环境因素的综合影响，可能来自于光照、温度等，但是与大气CO_2浓度和水分没有关系或关系很小。

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％。