The heat stability, thermal decomposition behavior and the effect of light aging on performance of HPVC were studied.

主要研究了高聚合度聚氯乙烯（H PVC）的热稳定性和热分解过程以及光老化对HPVC性能的影响。

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The invention relates to a polyacrylonitrile fiber for preventing skin from light aging, a preparation method and application thereof.

本发明涉及一种防止皮肤光老化的聚丙烯腈纤维及其制备方法和应用。

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The polypropylene(PP) was modified by self-made sericite-based inorganic UV-screen agent, and the mechanical properties of the PP composites after light aging were tested.

用自制的绢云母质无机紫外屏蔽剂改性聚丙烯（ PP），对光老化后的PP 复合材料进行力学性能测试。

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Blackburn, Carol W. Greider and Jack W. Szostak are credited with discovering how chromosomes are protected against degradation -- a field that could shed light on human aging and diseases, including cancer.

CNN: 3 Americans win medicine Nobel for chromosome research

The content zooms and clatters over an array of archaic and futuristic gear, from aging copper phone lines to light-bending optical switches.

FORBES: Weaving The Perfect Net

The area's aging factories are prized for their clear, light-filled interiors, but this one is lighter and clearer than most, with more windows and none of the internal columns that clutter up the floors elsewhere.

WSJ: Donald Judd's SoHo Haven