查询词典 essential resistance

Specially, in allusion to winding"s DC resistance test, a measure named gyrator is promoted which realized the resistance"s fast and accuracy test.

特别针对绕组直流电阻测试，提出了用"回转器法"实现绕组的直流电阻的快速、准确测试。

Under normal circumstances a 90-degree elbow bend resistance than 120 degrees, and each 90-degree bend head loss of about 0.5 ~ 1 m, each 20 m pipeline will enable the head of the resistance loss of about 1 meter.

一般情况下90度弯管比120度弯管阻力大，每一90度弯管扬程损失约0.5～1米，每20米管道的阻力可使扬程损失约1米。

The flow field of the PCCP pipeline is simulated, so the head loss and resistance coefficient are calculated which are consistent with the test data. Additionally, other pipelines of different diameter are also simulated, and the resistance coefficient's law along with the diameter is carried out.

对PCCP管道中的水流流场进行数值模拟，计算并求解出管道的水头损失和阻力系数，与模型试验取得了较为一致的结果；另外，还对不同管径的管道进行了模拟，得到了阻力系数随管径的变化规律。

In this paper genetic research and identification of resistance to head smut in maize and varieties breeding were summarized. There were still many problems should be resolved. Combination of biotechnology and routine breeding may improve the progress of resistance to head smut in maize breeding.

对当前玉米丝黑穂病抗性的遗传研究、抗性鉴定及品种选育等方面做了简要的概述，并分析了其中存在的一些问题，指出分子生物技术与玉米常规育种技术的结合将推动玉米抗丝黑穗病育种取得新的进展，希望对玉米抗丝黑穂病育种有所启示。

Leaves high resistance to disease, anti-size spot disease resistance in Head Smut.

高抗红叶病，抗大小斑病，中抗丝黑穗病。

The result suggested that Pob46 was a good resistance resource to head smut for the lowest incidence rate itself and in test combination, and Pob45 was also a relative resistance resource for the lower incidence rate itself and in test combination.

结果表明Pob46自身的发病率最低，测交组合的平均发病率也最低，是一个对丝黑穗病有较好抗性的CIMMYT种质资源；Pob45自身的发病率稍高，但测交组合的平均发病率不高，也是一个有一定利用价值的CIMMYT种质资源。

The genetic distances to resistant gene are 9.6 cM and 10.4 cM, respectively. The resistance to sorghum head smut physiological race 3 may be controlled by two mutual independent nonallelic genes, and there is interaction between them. It is found that molecular markers are easier to find in B population than R population during the screening of SSR markers. It may show the different resistance mechanism between restorer line and maintainer line.

高粱对丝黑穗病菌3号生理小种的抗性可能受2对彼此独立的非等位基因控制，并且基因之间存在着互作；筛选SSR标记时发现，高粱抗丝黑穗病基因的分子标记较易在保持系群体中找到，在恢复系群体中DNA片段多态性较少，表明恢复系和保持系在抗性机制上可能存在差异。

The high polymeric substances made by acrylics and ester are of such characteristics as antiweatherability, resistance to ultraviolet light, water proof, heat resistance, etc.

以丙烯酸及其酯制得的高聚物具有优良的耐候、耐紫外光、耐水、耐热等特性，因而，在涂料、粘合剂、皮革、化纤、造纸、印染、助剂等方面有广泛的应用。

The results show that the compound conductive fiber has typical structure of sheath-core consists of black greened polyaniline electric conductive deposition as the skin and the white polypropylene matrix fiber as the core, which makes the compound fiber preferable physical mechanical property. The intensity and the elongation ratio of the electric conductive fiber are decreased but the thermal stability is enhanced after modified. The compound fiber has the good acid resistance but poor base resistance. The thermal stability of the compound fiber prepared by 4-methyl-benzene sulfonic acid is better than that prepared by hydrochloride acid. Moreover, the compound fiber can be re-doped by other organic or inorganic acid after freed from the adsorbed acid. Furthermore, the electric conductivity of the compound fiber decreases with the temperature increasing but hardly changed with the humidity. The adsorptive ability and therefore the content of the polyaniline, the constant of electric conduction, and the durability of the compound fiber can be enhanced by thinning the diameter, section heteromorphosis, section heteromorphosis and plasma treatment of the surface or blending with COPET of the fiber.

结果表明：复合纤维是聚丙烯与聚苯胺的共混体系，具有典型的皮芯型结构，皮层为墨绿色的聚苯胺沉积层，形成连续的导电通道，芯层为白色的聚丙烯基质纤维，提供物理机械性能；导电改性后纤维的强度、强力和伸长率均有下降，但热稳定性得到提高；复合纤维的耐酸性比耐碱性好，以对甲苯磺酸做掺杂酸比盐酸掺杂聚苯胺热稳定性好，脱掺杂后的复合纤维，可用其它无机酸或有机酸进行再掺杂；复合导电纤维的电导率随温度升高降低幅度较大，但几乎不受湿度影响；基质纤维细旦化、截面异形化、表面等离子体处理或共混COPET等改性处理均能提高纤维的吸附性，进而提高复合纤维表面聚苯胺含量、电导率和耐久性。

Some elicitors stimulate plants and then cause the defense system of hevea, which can result in resistance to subsequent infection is induced resistance.

本实验测定了诱导剂苯并噻二唑诱导的橡胶对橡胶炭疽病的抗性，并且初步研究了诱导抗性产生的机理。

However it can often be frust ating for a child when people are unable to pronounce their name.

但它往往可以令人沮丧的一个孩子当人们无法断言他们的名字。

All these compounds were obtained from this genus for the first time. Compound, 4-cumylphenol, was a new nature product.

所有化合物均为首次从本属海藻中分离得到，其中4cumylphenol为新天然产物。