natural ageing

The changes in protein type during natural ageing of seeds

种子自然老化时蛋白质类型的变化

Relationship between Natural Ageing and Artificial Ageing of Graphic Arts Films

印刷胶片的自然老化与人工老化的关系

Natural ageing and earthquake are the two random danger elements that influence the service life of building .

自然老化和地震是影响房屋使用寿命的两个随机危险元。

And Al-Li alloy is insensitive to natural ageing after cold drawing deformation .

冷拔后自然时效对Al－Li合金不敏感。

Mechanism of Polypropylene Textiles against Natural Ageing

聚丙烯织物抗自然老化初探

Compression Set Change and Its Prediction of 16 kinds of Practical Formulation Vulcanizates for Long-term Indoor Natural Ageing

16种实用配方硫化胶长期室内自然老化压缩永久变形变化及预测

This paper deals with the low frequency damping of ZA27 alloy with solid solution treatment after natural ageing stability .

研究了固溶化处理的ZA27合金在自然时效稳定后的低频阻尼。

The results indicate that natural ageing after solution heat-treatment leads to the effective increasement of the comprehensive mechnical properties .

通过固溶后自然时效处理，可有效地提高合金的综合力学性能；

The natural ageing properties of polypropylene textile were studied under simulated climatic environment formed by accelerating tester for weather in this paper .

通过气候加速试验机模拟自然气候，讨论了聚丙烯类编织物的自然老化性能。

Heat ageing , natural ageing and water tolerance etc. tests are carried out to study and improve the ageing resistance of copper conductive adhesive .

将铜导电胶进行热老化、自然老化、耐水等试验，以研究其老化性能，并探求改善铜胶抗老化性能的途径。

It is found that natural ageing and electrochemical ageing are necessary to maintain high quality co-deposition of Ni-Cr alloy as well as some composition .

研究表明，自然陈化和电化学陈化对于保持一定组成和高质量的Ni/Cr合金共沉积是需要的；

Iron raises the room temperature hardness and high temperature sustained hardness as well as the hardness after long period of natural ageing , hut it decreases the impact toughness .

铁使合金的高温、室温、高温持久硬度及长期时效后硬度增加，使冲击韧性下降。

The No. 19 gaseous rust protection paper has no effect of atmospheric corrosion stability on the 166 and 167 aluminium alloys which were treated with quenching and natural ageing method .

19号气相防锈纸不能防止淬火自然时效的166167铝合金管材遭受大气腐蚀。

Through the analysis of the example and mechanism , the natural ageing cycle of the structure welded by than plate is less than the one welded by solid metal . It 's mechanism is analyzed .

通过实例分析，得出薄板焊接结构件自然时效周期远远小于实心件周期，并对其机理进行了分析。

The influence of the change in copy numbers of bacillus megaterium on enzymatic activity and the chemical constitution indicates that bacillus megaterium is the inner power for natural ageing .

巨大芽孢杆菌的DNA拷贝数的变化影响烟叶中酶活性及化学成分含量的变化，表明巨大芽孢杆菌是烟叶自然陈化的内在动力。

The yield strength is reduced by 10 ~ 20 MPa after natural ageing and it can be simulated by artificial ageing ( 100 ℃× 2h or 200 ℃× 1h ) .

自然时效后屈服强度下降10～20MPa，用人工时效可以模拟自然时效，工艺是100℃×2h或200℃×1h。

This paper sums up some key issues on ornamental silver study , reviews the main development of research on strengthening , its resistance to natural ageing and softening , and anti-tarnishing of silver alloy .

总结了饰品用银合金研究中的关键问题，阐述了银合金强化、抗自然时效软化和抗变色能力的主要进展。

Through the natural ageing test of hot-rolled reinforced bar , the fluctuation characters of mechanical property have been found out , and the ways of reducing factory check and index of mechanical property have been put forward .

通过对安钢棒材机组生产的带肋钢筋性能进行自然时效试验，找出了热轧带肋钢筋力学性能指标值的波动特点，并提出了减小工厂检验与用户检验力学性能指标值的差异的方法。

After 45 ℃ / 12h the fluctuations in the hardness is the largest , and 180 ℃ / 10h is the second , then the fifth period of natural ageing is the lowest .

经过45℃/12h的接头焊缝硬度波动最大，180℃/10h的次之，第五自然时效周期的最小。

And found two data limit of accumulative radiation dose : R1 and R2 . When accumulative radiation dose is smaller or near R1 , the attenuation rate of ρ, ε, P is the same as it of natural ageing .

还发现对于此复合材料存在两个累积辐射剂量的数值界限R1和R2。当累积辐射剂量小于或接近R1时，复合材料的ρ、ε、P和τ的变化趋势与自然老化规律基本相同；

Microstructure changes accompany with the variance of damping capacity . It is found that the damping capacities varies quickly and obviously during natural ageing . The damping capacity reaches the highest value 7 × 10 - 3 at the 10th day .

过饱和ZAC27合金在自然时效过程初期，阻尼性能迅速而明显地提高，在时效第10d时声频阻尼性能达到最高值，约为7×10-3；

It discusses the strengthening mechanism of addition elements on silver alloy in the aspects of solution strengthening , the fine-grained strengthening , the ageing strengthening and second-phase strengthening , and makes research on how addition elements affect the properties of resistance to natural ageing and anti-tarnishing .

从固溶强化、细晶强化、时效强化和第二相强化等方面讨论了银合金添加元素的强化机理，以及添加元素对抗自然时效和抗变色能力的影响。

Treated in the artificial ageing condition of 100 % relative humility and 40 ℃ for 5 days , the ageing degree is equal to that during one summer natural temperature ageing condition .

在100%的相对湿度、40℃的人工老化条件下处理5d左右，对种子的老化程度与一次自然室温越夏的老化程度大致相当。

An EXAFS study for structure relaxation of cu_ ( 55 ) zr_ ( 45 ) metallic glass during natural and artificial ageing

天然和人工时效Cu（55）Zr（45）金属玻璃结构弛豫的EXAFS研究

The structure change of Cu_ ( 55 ) Zr_ ( 45 ) metallic glass during natural and artificial ageing was investigated with EXAFS method .

本文应用EXAFS结构分析法研究了Cu（55）Zr（45）金属玻璃经天然和人工时效后引起的结构变化。

In the paper , the results of experiment are provided , the micro-mechanisms of both natural and artificial ageing are studied , and a new way to improve the mechanical properties of zinc-containing alloys is proposed .

文内提供了实验结果，并对自然时效和人工时效的机制进行了研究，为提高锌基合金型材的力学性能开拓一条新途径。

Experiments have shown that soybean phospholipid paste is obviously helpful in decreasing blood lipids and retarding the ageing process of tissues , thus making a good natural agent for resisting ageing .

试验表明服用豆磷脂膏有明显的降血脂作用，可推迟组织及细胞的老化，是一种良好的天然抗老化剂。