1) Impediment
[英][ɪm'pedɪmənt] [美][ɪm'pɛdəmənt]
阻因
1.
The Pondering on Some Impediments in Education for All-round Development of Mathematics;
数学素质教育若干阻因的思考
2) retardation factor
阻滞因子
1.
A study on retardation factor of atrazine in a sandy loamy soil;
砂质壤土中农药阿特拉津阻滞因子的研究
2.
Effects of solution/soil ratios on exchangeable NH_4~+ retardation factor;
土壤液土比对土娄土NH_4~+运移阻滞因子的影响
3.
The transport law of leachate pollutant COD in different lithology and thickness vadose zones was studied , and some concerned hydrochemical transport parameters(retardation factor R and the rate of hydrochemical transport E)of COD in vadose zones was also calculated.
用若干土柱模拟试验研究了垃圾渗滤液有机污染组分在不同岩性、不同厚度包气带介质中的运移规律,并计算了有机污染组分在包气带中运移的有关水化学迁移参数(阻滞因子R和水化学迁移率E)。
3) friction factor
摩阻因数
1.
The friction factor formula of turbulent transition zone proposed by a Russian Scholar Altshul(Aльтщуль)has been widely used in oil storawge and transportation filed in our country.
阿尔特舒尔紊流混合摩阻因数公式在国内石油储运界应用较多,但该式只适用于管径较小、管内壁较粗糙、雷诺数较低的情况,而科尔布鲁克公式和哈兰德公式没有这种限制,后者的计算也很简单,故阿尔特舒尔公式不应继续使用。
2.
Turbulent transition zone is the main zone of trangportating oil products in pipeline, and its basic friction factor formula is Colebrook formula.
紊流混合摩擦区是成品油管输的基本流区,其摩阻因数的基准公式为科尔布鲁克公式,国标采用十分近似、容易计算的哈兰德公式。
3.
Pressure drop calculation bases on friction factor calculation.
沿程摩阻因数是制约多相管流发展的关键,摩阻因数是压降计算的重要内容之一,其计算的准确性直接决定了压降计算的准确性。
4) resistance factor
阻力因子
1.
The results of plugging off experiment indicate that YFP-2 foam agent can plug efficiently because its resistance factor is larger than 2.
封堵实验结果表明,阻力因子大于2。
2.
The resistance factor of gas and liquid commingled injection grows with the injection rates rising while that of gas and liquid alternative injection wavily rises with the injection rates rising,however both the methods ca.
封堵调剖实验表明,泡沫复合驱具有优良的封堵调剖能力,其封堵能力随渗透率增加而增大;气液共注时,阻力因子随注入量增加而持续增大,交替式注入时,阻力因子随注入量的增加波动上升,但随着注入量不断增加,两种方式均能产生较好的封堵效果;低气液比交替注入时,封堵作用表现缓慢;大段塞交替注入时,封堵效果相对较弱。
3.
The results showed that the resistance factor of FPJ surfactant achieved 17.
结果表明,表面活性剂FPJ的阻力因子达到17。
5) Gene disruption
基因阻断
1.
Homologous recombination was used for dnmV gene disruption in SIPI-1482, and one genetically stable disruptant was obtained.
利用同源重组对SIPI-1482菌株的dnmV基因进行基因阻断,得到一株遗传稳定的破坏子。
2.
To improve the production of geldanamycin in Streptomyces hygroscopicus 17997,gene disruption was done to delete the naphthalenic AHBA genes(shnSOP),encoding the products that share the common biosynthetic substrates with geldanamycin.
采用基因阻断技术,将吸水链霉菌17997中的萘醌类AHBA生物合成基因簇(shnSOP)进行破坏,以获得ΔSOP菌株,从而减少对合成所需共同底物AHBA的争夺。
3.
First, the 863bp inside fragment of tbmA gene was obtained by PCR, the gene disruption vector (pSPU112) was constructed and transferred into S.
为研究其抗生素生物合成途径，对黑暗链霉菌H6染色体上的tbmA基因进行基因阻断实验，利用PCR获得tbmA基因内部863bp片段，构建基因阻断穿梭载体pSPU112，经接合转移导入黑暗链霉菌H6，筛选单交换阻断变株，并用Southern blot验证阻断变株的tbmA已经被破坏。
6) steric factors
位阻因子
补充资料：D-阻氨酸
CAS: 351-50-8
分子式: C6H9N3O2
分子量: 155.15
熔点:287℃
中文名称: D-阻氨酸；D-组氨酸
英文名称: d-histidine
分子式: C6H9N3O2
分子量: 155.15
熔点:287℃
中文名称: D-阻氨酸；D-组氨酸
英文名称: d-histidine
说明：补充资料仅用于学习参考，请勿用于其它任何用途。
参考词条