核素

Often a history of hepatitis or liver cirrhosis, serum alpha-fetoprotein-positive, first have hepatomegaly, jaundice in the late, abdominal pain not due to changes in body position changes, ultrasonography and radionuclide scans can be found in the liver lesions.

常有肝炎或肝硬化病史、血清甲胎蛋白阳性，先有肝肿大，黄疸在后期出现，腹痛不因体位改变而变化，超声和放射性核素扫描可发现肝占位性病变。

Objective:To study the hypoxanthine phosphoribosyl transferase gene mutation of rat peripheral blood lymphocytes and spleen lymphocytes induced by intermal radiation and of human peripheral blood lymphocytes induced by Y -ray.

目的：本实验主要是用克隆法研究放射性核素内照射诱发Wistar大鼠外周血淋巴细胞和脾淋巴细胞次黄嘌呤鸟嘌呤磷酸核糖转移酶基因突变及γ射线外照射诱发健康成年人外周血淋巴细胞HPRT基因突变情况。

It has been mostly used in gastroenterology to assess flow of ingesta through the gastric region as an alternative to radionuclide studies.

其在胃肠领域的最多应用是评价通过胃部的食物流动以替代临床仍然视为胃排空测量金标准的核素法。

In this report, the intercomparison of radionuclide measurement with γray spectrometer for environmental samples organized by State Environmental Protection Administration recently was introduced.

介绍了国家环境保护总局组织的一次全国环境样品放射性核素γ谱测量比对。

The intrinsic property in radiation that produces photochemical activity.

活跃的碘化核素；在活的有机体内的碘化机制。

Finally, numerical simulations for the forward and inverse problems are given.

最后，给出核素迁移模型的正问题和反问题的数值模拟。

The digital signal method is a discrete deconvolution technology.It uses the shape-factor to create the forward equation of subdivision interpretation,and the discrete signal anti-filtering technology to get the inversion equation and the general formula for numerical solution of quantitative radionuclide content.

本文提出的数字信号法是一种离散反褶积法，它采用形态系数创建分层解释正演方程，利用离散信号反滤波技术求得反演方程及定量核素含量的数值解通式。

Recombination radiation can ionize another atom of the same species.

复合过程产生的辐射可能使同一原子核素的另一个原子发生电离。

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。

LEK gives out thenuclear data from ENDF/B-IV format files as the input data of KQCS automati-cally. LEK makes it possible to generate the fast reactor multigroup constantsfrom Chinese Evaluated Nuclear Data Library in Chinese Nuclear Data Center.It is possible now for CNDC to make benchmark testing for CENDL.

LEK取数既准确又节省大量的人力，改变了KQCS程序需手工输入上万个核数据的繁烦、落后局面，使中国核数据中心用计算机计算大量核素的快中子反应堆多群常数成为可能，为检验中国评价核数据库创造了条件。

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％。