老化

This rubber is isobutylene of pvp-k, complete saturated rubber, So has the extremely good physical and chemical properties, for example have good ozone-resisting aging resistance, oxygen ageing resistance, light ageing resistance, climate aging resistance, the chemical stability and excellent air tightness and water resistance, excellent elasticity and energy absorption performance.

该橡胶是异丁烯的均聚物，无双键，为完全饱和橡胶，所以具有极好物理和化学性能，如，良好的耐臭氧老化性、耐氧老化性、耐气候老化性、较好的化学稳定性、优异的气密性和耐水性，极好的弹性和能量吸收性能。

In this study, the aged watermelon seeds were selected as material, soaked by different concentrations of salicylic acid, calcium nitrate and gibberellic acid (GA3), to study the effects on germination rate, related physiological and biochemical indexes of aged watermelon seeds. The results show that the activity of aged watermelon seeds was obviously increased after soaking, and the best treatment to promote germination was Ca(NO3)210mmol/L. Besides, conductivity and soluble sugar content of seeds lixivium, and MDA content of seeds were decreased obviously after treated by SA, Ca(NO3)2 and GA3, and SA treatment had the best obvious effects.

本试验以自然老化的西瓜种为试材，采用不同浓度的水杨酸、硝酸钙、赤霉素预浸种处理，研究其对老化西瓜种子萌发及相关生理生化指标的影响，结果表明：不同处理均可显著提高老化西瓜种子活力，以10mmol/L的Ca(NO3)2处理促进萌发的效果最为明显；不同处理均能明显降低种子浸出液电导率、可溶性糖含量及种子中丙二醛含量，以水杨酸的各处理效果最好。

The results of experiments show that use of steady and dynamic combined aging method can improve reliability of niobium capacitor, thereby meeting the requirements of industrial applications.

采用静态老化与动态老化相结合的老化方法，可以进一步提高片式铌电容器产品的可靠性，满足工业化应用的要求。

If ageing could evolve in one-celled organisms for the long-term good of the species, and despite its cost to the individual, then why not other forms of ageing that affect higher animals?

如果为了物种的长期利益，单细胞生物体可以进化出老化，可以不顾老化要个体付出代价；那么，为什么不能进化出影响高等动物的其他形式的老化？

The profound researches on the mechanism of photooxidation, rheological properties, service performance and retained fatigue life of asphalt binder, under the condition ...

对沥青在紫外光老化过程中的老化机理、流变特性、路用性能及残余疲劳寿命进行深入系统的研究，可以为评价和预测沥青的抗紫外光老化性能提供理论基础和技术指导。

Friction tests in moving water and field sheer tests and seepage model tests and the effects of seepage defending and rough ratio tests and the capacity of resisting from frozen bulge and ice pressure. 2. Through the series track ageing tests of geosynthetics for 14 years, if the covering is 40cm thick and the initial strength is more than 500N/5cm, the geosynthetics can be used for at least 50 years, most to be more than 100 years. Under the same conditions, the strength and elongation of geotextile are both decrease, and for geomembrance the strength increased in early days. One important ageing index for geomembrance is embrittlement.

2通过工程现场14年的取样，进行老化试验分析，结果显示，土工合成材料在40cm厚以上岩土严密保护的条件下，初始强度大于500N/5cm，使用年限至少可达50年，多数情况可超过100年；在同等条件下，土工织物老化在力学性能上的表现是强度和延伸率都呈下降趋势，而多数土工膜在初期力学性能上表现是强度增加延伸率下降，到后期强度和延伸率才都呈下降趋势，脆化是衡量土工膜老化性能的重要指标。

The relationship between water tree growth speed and its influence factors, such as aging time, frequency of electrical field, and relative permittivity, was studied in this paper.

按照建立的水树枝老化试验装置和方法标准，本文对低密度聚乙烯和聚甲基丙烯酸甲酯两种固体片状材料进行了水树枝老化规律的试验研究，重点研究了低密度聚乙烯材料中水树枝引发和发展的影响因素和规律，包括盐溶液的浓度对低密度聚乙烯中水树枝形态的影响，老化时间、外施电压频率、盐溶液的电容率与水树枝生长速度的关系。

Results show that, under the conditions depicted in this paper, generation rates of characteristic products don't speed up with increase of samples' initial aging degrees, but are consistent with the change of bond scission rate of cellulose. When samples are in mid-end life and aged further, the generation rate decreases almost exponentially.

结果表明：在该文的试验条件下，处于老化中后期的油纸绝缘，在后期继续老化过程中特征产物的生成速率随油纸绝缘初始老化程度的增加并不呈现递增趋势，而是成近似指数递减关系，这与纤维素绝缘纸降解过程中断键速率的变化一致。

The gel (600mg/L HPAM, 50mg/L AlCA) keeps its complex viscosity as about 400mPa·s when aged at 50℃ for 2 months, which indicate that HPAM-AlCA weak gel is suitable for application in middle temperature and has excellent properties and low cost.

HPAM—AlCA凝胶在80℃下老化时，其强度将迅速下降，在50℃老化时仍可保持良好的交联效果，组成为600mg／L HPAM+50mg／L AlCA+1.5％NaCl的凝胶经50℃老化2个月后，复粘度达近400mPa·s。

The effect of thermal and anaerobic ageing on the structure and properties of NR vulcanizates was studied.The crosslinking density and distribution of NR vulcanizates during ageing were determined with the method of devulcanization by using the chemical probes,and the physical and dynamic properties were also determined.

研究了热空气老化和真空老化对NR硫化胶结构和性能的影响，采用化学探测剂脱硫的方法测定了老化过程中NR硫化胶交联密度及交联键分布变化的情况，同时测定了硫化胶的力学性能和动态性能随时间变化的情况。

I can not make it blossom and suits me

我不能让树为我开花

When temperatures are above approximately 80 °C discolouration of the raceways or rolling elements is a frequent feature.

当温度高于 80 °C 左右时，滚道或滚动元件褪色是很常见的特征。