31 NTD fetuses and 62 adult controls were analysed for calculation of OR of homozygotic MTHFR.

Results Out of 18 cases, homozygotic mutation happened in 7 cases ( 38.8%, 7/ 18);

结果18例中有7例发生纯合性缺失，其纯合缺失率为38.8%（7/18）；

The investigations show that their pure alternative refrigerants hardly exist. Hence, mixture refrigerants are being used as a replacement.

研究者发现它们的纯质替代制冷剂几乎不存在，因此迄今为止它们的替代制冷剂大多为混合工质。

A primary use of testing the weight percentages of nitrogen, carbon, hydrogen, oxygen and sulfur within a variety of solid or liquid explosive of pure organic compounds.

主要测试无爆炸性之各种固态或液态之纯质有机化合物中的氮、碳、氢、氧及硫之重量百分率。

According to the nature, Guangxi Limestone is separated into three types: pure limestone, siliceous limestone, mixed sand shale or limestone of igneous rock.

广西的石灰岩按性质可分为纯质石灰岩、夹硅质石灰岩、夹砂页岩或火成岩的石灰岩三种类型。

In the leading basic research of molecular thermodynamics new theory 10: a theoretical equation of the normal boiling point for hydrocarbons and carboxylic acids

分子热力学前沿基础研究领域中的新理论10：分子间力相对值的研究与纯质正常沸点理论方程

The authors give a novel conception that in order to increase the cooling capacity of a pulse tube refrigerator at 80K temperature range, refrigerant mixtures are introduced instead of pure helium.

提出了采用合适的混合工质代替纯质氦以提高脉管制冷机在80K温区制冷量的新构思。

Inspection of grain and oilseeds& Methods for determination of purity rate of sweet potato flakes

GB/T5500-1985粮食、油料检验甘薯片纯质率检验法

Theoretical cycle performances of mixture refrigerant R32/ R134a and pure R22 are analyzed. The experimental study on a novel air source heat pump system with altering concentration of mixture refrigerant is carried out by using pure R22 and mixture R32/ R134a respectively.

本文分析了不同浓度混合工质R32／R134a和纯质R22理论循环性能，应用新型变浓度实验热泵装置测定了混合工质R32／R134a的变浓度循环特性，并与纯质R22进行了比较。

A review and evaluation of investigation on condensation of pure refrigerants inside tube

纯质制冷剂管内冷凝计算方法的回顾与评价

If that stat is a 1-or if it's a multiplier-the child will be in trouble, even though you might not have been. This condition, having the same genetic code on both copies of a chromosome, is called homozygosity.

如果这个相同的染色体的值是1或者是一个倍率染色体，那么你的孩子就会有大麻烦了——即使你从未遇上过。这种两个遗传序列上的基因代码都是一致的情况被称为纯质性。

The term element refers to, a pure substance with atoms all of a single kind.

这个术语指的是, 纯元素的原子与所有的物质单一类型.

In other words, gasoline is not what chemists call a pure substance.

换言之, 汽油并不是化学家们所说的纯物质.

The star indicates a property of a pure substance or a collection of pure substances.

星号表示纯物质或纯物质集合的性质.

Semi-metal structural model of organic molecules and thermodynamic properties ── on the standard Gibbs energy of formation and molecular structure of organic compounds

有机分子的半金属结构理论模型与热力学性质&论有机纯质的微观结构与标准生成自由能

When it is struck, a tuning fork produces an almost pure tone, retaining its pitch over a long period of time.

音叉被敲击时，产生几乎纯质的音调，其音量经久不衰。

New theory in the front of theoretical basis research of molecular thermodynamics 4: on molecular structure of organic compound and theoretical equation of critical pressure

分子热力学前沿基础领域中的新理论4：论有机纯质的分子结构与临界压力理论方程

Therefore, it shows that mixture replacing pure substance has advantage of energy savings and provides a theory basis for further research.

从而显示了混合工质替代纯质的节能优势，为替代工质的性能研究提供了一种理论比较的依据。

Compared with the experimental data now available the average and maximum calculation error of pure water saturated pressure is respectively 0.09% and 0.44%.

与现有实验数据比较，纯质水的饱和压力计算平均误差为0.09%，最大误差为0.44%；

A new theory in the basic research of the condensed matter physics ⅰ the substantial molecule structure and theoretical equation of liquid heat capacity and 3 theorems

凝聚态物理学基础研究领域中的新理论Ⅰ&纯质的分子结构与液体C（p，1）理论方程及3个定理

New theory in the front of theoretical basis research of molecular thermodynamics 2 semi-metal structural model of organic molecules and theoretic equation of Δ H_ ( f g)~ 0 of pure organic compound

分子热力学前沿基础理论研究中的新理论2：有机分子的半金属结构理论与有机纯质的ΔH（fg）~0理论式