查询词典 nr.

The chain structures of S SBR2305,Buna SL25 1 and E SBR1500 were analysed by FTIR,and the influences of these three SBRs on the wear resistance,heat build up,rolling resistance and wet traction of NR/SBR blend were investigated by the compression heat build up test with constant load,DMA etc..

采用傅立叶变换红外光谱分析了溶聚丁苯橡胶S SBR2 30 5、BunaSL2 5 1及乳聚丁苯橡胶E SBR15 0 0 3种SBR的链化学结构，采用定负荷压缩生热、动态力学谱等方法研究了 3种SBR对NR/SBR并用胶耐磨性、生热、滚动阻力及抗湿滑性的影响。

To analyse correlativity of NR activity and nitrite and nitrate content, the related of them is not significant.

通过对亚硝酸盐和硝酸盐与NR活性的相关分析得出，二者与NR活性的相关均未达到显著水平。

The effect of mixer synchronous rotor shape on the dispersibility of nano-fillers and physical properties of NR vulcanizate was investigated.

研究密炼机同步转子构型对纳米填料在NR胶料中的分散性及NR硫化胶物理性能的影响。

The effect of liquid isoprene rubber on properties of NR/BR compound,physical properties and thermal air aging property of its vulcanizate was investigated and compared to that of aromatic oil.

以液体聚异戊二烯橡胶为反应型增塑剂，研究LIR对NR/BR混炼胶性能、硫化胶物理性能和耐热空气老化性能的影响，并与添加芳烃油的NR/BR并用胶进行对比。

NR activity was enhancing gradually in the whole growth stages then decreasing. The peak of NRA was advanced at jointing with the lower holard and it was at silking with the higher holard.

当土壤含水量较低时，NR活性出现峰值的时间提前至拔节期，而含水量较高时，NR活性峰值出现在吐丝期。

Fumed silica was surfacely modified with resorcinol and hexamethylenetetramine complex, and the product was then reacted with natural rubber to prepare NR/modified fumed silica (NR/M-silica) nano-composites via a mixing and curing process.

用间苯二酚与六亚甲基四胺络合物对气相法白炭黑进行表面改性，产物与天然橡胶混合，通过混炼和硫化制备了天然橡胶／改性气相法白炭黑(NR/M-silica)纳米复合材料。

Results showed that hypochromism and red shifted KAE absorption spectra were observed in the presence of DNA,and that synchronous fluorescence of DNA-NR was quenched with addition of KAE,indicating that a strong competition for DNA binding ...

结果表明：加入DNA后，山柰酚的吸收光谱呈现减色和红移现象；山柰酚的加入使得DNA-NR同步荧光强度猝灭，表明山柰酚对NR与DNA的结合为竞争性抑制；山柰酚的加入使得DNA的粘度增大，热变性温度升高。

The results showed that the wheat-straw powder had little reinforcing effect on NR,but had good filling effect;when the wheat-straw powder was modified by sodium hydroxide solution,silane coupling agent KH-550 or its solution,the physical properties of wheat-straw powder/NR composite were improved;the silane coupling agent KH-550 solution possessed better modifying effect.

结果表明，小麦秸秆粉末对NR无明显补强作用，但具有良好的填充作用；采用氢氧化钠溶液、硅烷偶联剂KH-550或其水溶液对小麦秸秆粉末进行表面处理，均可改善复合材料的物理性能，其中硅烷偶联剂KH-550水溶液的效果较好。

The results showed that,by using 2~4 phr C5 petroleum resin,the adhesion strength of TPI/NR blend improved,the heat build-up decreased,and the physical properties and thermal aging property were better,the TPI/NR blend with this formulation could be an ideal compound of TBR tire shoulder pad.

结果表明，采用2~4份C5石油树脂的TPI/NR并用胶在保持较好的物理性能和耐热空气老化性能的基础上，混炼胶粘合强度提高，硫化胶生热降低，是一种较为理想的全钢子午线轮胎胎肩垫胶配合。

The results showed that both LIR and LIR/aromatic oil could improve the processibility of NR/BR blend,and the plasticizing effect of the latter was more significant than that of LIR or aromatic oil alone resulting in lower compound viscosity,energy consumption and processing cost;and the NR/BR vulcanizate with LIR/aromatic oil possessed good physical properties and better dispersion of carbon black.

结果表明，LIR和LIR/芳烃油并用体系均能有效改善NR/BR混炼胶的加工性能，且后者的增塑效果较LIR或芳烃油单用时更为显著，其对应的混炼胶粘度较小，工艺能耗和成本较低；LIR/芳烃油并用体系对应的NR/BR硫化胶性能良好，炭黑在其中的分散性也较好。

The big eared hedgehog, the little owl, the sand gecko, the three-toed jerboa, and every show needs a villain - saw-scale - the viper!

大耳刺猬，小猫头鹰，沙壁虎，三趾跳鼠，每场戏都需要反派角色：蝰蛇。

Plasmodiophora brassicae ; resting spores ; density gradient centrifugation of sucrose ; ultrasonic disruption

根肿；休眠孢子；蔗糖密度梯度离心；超声波破碎