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The experimental results showed that the lower the viscosity of the oligomer, the better the improvement of the powdering; when the content of the oligomer in the phenolic resin was 3%, the powdering of the modified foam was only 40% of that of non-modified foam, with elastic resilience higher than 60%; The mechanism of the ...
结果表明:预聚物的粘度越低,对酚醛泡沫的粉化性的改善效果越好;当预聚物的质量分数为 3 %时,改性泡沫的粉化程度仅为未改性的 40 %,且使泡沫具有一定的弹性,回弹率大于 60 %;聚氨酯预聚物对酚醛泡沫塑料的改性机理不是简单的物理共混,同时伴有共聚反应发生。
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Optimization of resolution conditions and affecting factors on resolution such as solvent, the molecular ratio of racemate to resolving agent, method of reaction, concentration of racemate, crystallization temperature and crystallization time were studied.
对影响拆分的因素溶剂和底物浓度通过均匀实验进行了优化,同时对其他影响因素如底物与拆分剂投料比、反应物溶解方式、结晶时间和结晶温度等进行了考察。
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The distribution pattern also indicate radiolarian concentrations are strongly affected by the sediment type, radiolarian abundance and diversity is higher in the clay or mud than in fine sand, silt or coarse sand and decrease with the increase of terrigenous material. There is direct correlation between the radiolarian preservation and the amount of volcanic glass, the numerous volcanic ash shards have a significant influence on the radiolarian distribution pattern.
沉积物类型特别是其粒度和陆源物质的含量极大地影响着放射虫的分布,放射虫的丰度和分异度明显地随沉积物粒度的增大和陆源物质含量的增加而减小;同时,放射虫的分布也显示了与沉积物中火山玻璃含量的密切相关性。
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The polymeric soil amendmentswere applied in increasing soil value,and reclamation of saliane sodic soil,and greeningdesert,and controlling water and soil erosion,and amending arid and semiarid soil,andincreasing fertilizer utilization rate and crop yield,etc.
本文研究了淀粉接枝共聚物、羧甲基纤维素接枝共聚物、壳聚糖接枝共聚物、聚丙烯酰胺及其衍生物等对赤红壤的改良作用,揭示了赤红壤在这些聚合物作用下理化参数的变化规律。
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UHMWPE has regular molecule chain and lower shear strength, so it improved the tribological property of PA66. When the amount of the transferring layer reached a certain value, severe plastic distortion and adhesion wear occurred, and wear resistance of the blends was related to the mechanical property of the blends. Worn microstructure changes with addition of compatibilizer. Soft UHMWPE produced from friction heating has low shear strength, and it improves the tribological property of PA66 during the friction course.
结果表明:加入MAH-g-HDPE相容剂可以使共混体系的相容性得到改善,提高共混物的机械性能;具有平整分子结构的UHMWPE有利于改善PA66的摩擦磨损性能,当摩擦偶件的转移层达到饱和状态后,共混物的耐磨性与其力学性能相关;共混物在摩擦过程中表现出严重的塑性变形和粘着磨损,但在共混体系的摩擦过程中,对摩擦磨损性能起主要作用的是受热软化的UHMWPE在磨损表面形成低剪切强度的界面层,从而使得PA66的摩擦磨损性能明显改善。
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In this research, the activities of CWDE were measured by saccharifying according to the theory that red-brown amino compounds were produced when 3, 5-dinitro salicylic acid and aldehyde were heated together. And the testing conditions were made clear. The activity of Cx should be tested with optimal temperature of 50℃, optimal pH of 4.8, incubation time of 30 min, and optimal substrate of 0.6% CMC-Na. Due to the heat-libality, Cx should be sterilized more than 10 min. The testing conditions of the activity ofβ-G were almost the same with Cx except the substrate of 0.5% salicin and the sterilization time of more than 15 min.
主要取得了一下成果:(1)明确了条锈菌细胞壁降解酶活性测定的条件:羧甲基纤维素酶活性的测定条件为50℃,pH4.8,反应时间30min,底物浓度为0.6%羧甲基纤维素钠,以DNS法测定,且失活酶液的灭活时间应大于10min;β-葡萄糖苷酶活性的测定条件为:50℃,pH4.8,反应时间30min,底物浓度为0.5%水杨苷,以DNS法测定,且失活酶液的灭活时间应大于15min;果胶酶活性的测定条件为:50℃,pH4.8,反应时间1h,底物浓度为0.25%果胶,以DNS法测定,且失活酶液的灭活时间应大于10min。
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The surface activity of Hibiscus syriacus has been studied and shows thatHibiscus syriacus has good surface activity.The influence of temperature,saltness,water hardness and pH on the surface activity of its aqueous solutionsis also studied and shows little influnce.Also the mixture systems of Hibiscussyriacus with some anioic surfactants have been studied and the results show thatthe mixture systems can produce remarkable synergism.
天然表面活性植物木槿叶的应用研究本课题对天然植物原料木槿叶提取物中的表面活性物的性质(临界胶束浓度、表面张力和起泡性能)及其影响因素(温度、pH、水硬度和盐度等)进行了系统的研究,结果表明木槿叶表面活性物具有较好的表面活性,且它的cmc和〓在一定范围内受一些因素的影响也不大,是一种理想的香波原料;同时也研究了木槿叶活性物与其它温和型的阴离子表面活性剂的复配体系,表明具有明显的协同增效效果。
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By projecting a laser marker onto the object in the environment, such object therefore can be identified through trigonometric calculation. Finally, the color information of such object can be taken as the color model for tracking. This color model will be updated by the light source at each moment of sampling, which helps enhance the stability of detection system.
其侦测方式是以线式雷射光器在目标物上的投射及三角几何关系辨识环境中的目标物,最后再以此目标物的颜色资讯当作所要追踪的色彩模型,此色彩模型会随著每次取样时刻的光源而更新,可提高侦测系统的稳定性。
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Behavioral responses of red panda to anogenital gland secretions scent in non-breeding seasonThe male can receive signal in the odor of anogenital gland secretion, and arose obvious territorial behavior, but can not distinguish sex via anogenital gland secretion scent.
非繁殖季节成年小熊猫对肛周腺分泌物气味的行为反应雄性个体可以接收肛周腺分泌物气味中的信号,并引起了较强的领域行为的表现,但不能通过肛周腺分泌物的气味区分性别。
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However, accordingto characteristics of bases variation, the second group could be divided into threesubgroups.
与日本T、M分离物以及我国C分离物的CP基因序列进行比较,表明这3个分离物与第二组关系较近。
- 推荐网络例句
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Finally, according to market conditions and market products this article paper analyzes the trends in the development of camera technology, and designs a color night vision camera.
最后根据市场情况和市面上产品的情况分析了摄像机技术的发展趋势,并设计了一款彩色夜视摄像机。
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Only person height weeds and the fierce looks stone idles were there.
只有半人深的荒草和龇牙咧嘴的神像。
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This dramatic range, steeper than the Himalayas, is the upturned rim of the eastern edge of Tibet, a plateau that has risen to 5 km in response to the slow but un stoppable collision of India with Asia that began about 55 million years ago and which continues unabated today.
这一引人注目的地域范围,比喜马拉雅山更加陡峭,是处于西藏东部边缘的朝上翻的边框地带。响应启始于约5500万年前的、缓慢的但却不可阻挡的印度与亚洲地壳板块碰撞,高原已上升至五千米,这种碰撞持续至今,毫无衰退。