Sucrose had a significant influence on auxin-induced callus formation. With the sucrose concentration increasing from 3％ to 6％ in the medium, MCPA, 4-CPA and 2, 4, 5-T induced callus more easily than 2, 4-D and Dicamba, while NAA, IBA and Picloram hardly induced callus.
培养基中蔗糖的浓度对生长素诱导愈伤组织的作用有显著的影响，当把MS培养基的蔗糖浓度由3％提高到6％时，MCPA、4-CPA、2，4，5-T均比2，4-D或Dicamba更有效地诱导愈伤组织，而NAA、IBA与Picloram几乎不能诱导愈伤组织。
Two haptens of MCPA, 6-[(2-methyl-4-chlor phenoxy aceto amino] hexanoic acid and 4-[(2-methyl-4-chlor phenoxy aceto amino]butanoic acid were synthesized with MCPA and amino-hexanoic acid or amino-butanoic acid.
以除草剂2甲4氯、氯化亚砜、氨基己酸和氨基丁酸等为起始原料，经两步化学反应分别合成了两种MCPA半抗原：6-(2-甲基-4-氯苯氧乙酰基)氨基己酸和4-(2-甲基-4-氯苯氧乙酰基)氨基丁酸。
This paper introduces a method to determine the content of MCPA-Na by RP-HPLC.
利用反相高效液相色谱外标法测定了2甲4氯钠的含量，方法的标准偏差为0.11，变异系数为0.83%，平均回收率为99.77%。
Compared with Bensulfuron methyl which is the main herbicide used locally, PCP+Na+MCPA+Nap+Prometry with wide weed controlling spectrum, can kill quickly Potamogeton distinctus in rice fields.
以五二扑与当地主要推广的除草剂苄磺隆相比较，具有杀草谱广，对稻田主要杂草眼子菜的杀灭速度快。
The content of MCPA-Na were determined by using HPLC with C18 Column and methanol: water (60:40) as mobile phase.
建立了高效液相色谱法测定2甲4氯钠主成份的定量方法。
Quantitative analysis was conducted on the active ingredients in a sulcotrione plus MCPA package mix formulation using HPLC with a C18 reverse phase column, a variable wavelength UV detector, a mobile phase of methanol-water, and an external standard.
采用高效液相色谱法分析磺草酮·2甲4氯复配制剂，使用C18反相柱和紫外可变波长检测器，以甲醇+水为流动相，用外标法对有效成分进行分析和定量。
The results showed that the variation coefficients of MCPA, atrazine and ametryn were 0.48%、0.79%、0.43%, The standard deviations were 0.037、0.085、0.069 respectively, The average recoveries were 98.51%、102.60%、99.09%, and the linear correlations were 0.9995、0.9993、0.9994 respectively.
分析结果表明2甲4氯、莠去津和莠灭净的线性相关系数分别为0.9995、0.9993、0.9994；标准偏差分别为0.037、0055、0.069；变异系数分别为0.48%、0.79%、0.43%；平均回收率分别为98.51%、102.60%、99.09%。
Initial Study on Controlling Weeds of Sugarcane Field with 55% Mixed MCPA-Isooctyl and Ametryn EC
55%2甲4氯异辛酯·莠灭净乳油防除蔗田杂草药效试验初报
Analysis of atrazine and acetochlor herbicide by gas chromatography; Field Trials on 50% Mixed MCPA-Na and Ametryn WP against Weed in Sugarcane Field
气相色谱法检验莠去津和乙草胺除草剂50%2甲4氯钠·莠灭净防除蔗田杂草药效试验
Field Trials on 50% Mixed MCPA-Na and Ametryn WP against Weed in Sugarcane Field Experimental study on strengthening of chlorine dioxide preoxidation for conventional water purification process
50%2甲4氯钠·莠灭净防除蔗田杂草药效试验二氧化氯预氧化对净水工艺的强化试验研究
A high Performance liquid chromatograph method was developed for the determination of MCPA, atrazine and ametryn mixture.
本文建立了在同一液相色谱条件下测定混制剂中2甲4氯、莠去津和莠灭净含量的方法。
The main causes are the overuse of MCPA weedicide and shallow ploughing of soil, etc.
主要发生原因是麦田长期单一使用2甲4氯除草剂、土壤浅耕等。
3D-/MCPA composites under water friction are almost 50 percent of that under dry friction.
水润滑条件下C3D/MCPA复合材料的摩擦系数和磨损率几乎为干摩擦时的50%。
The results indicated that Ammonium Nitrate had the effects of promoting plant leaf absorption of MCPA Sodium.
采用高梁玻皿生测法，测定了在硝酸铵存在下棉花叶片和菜豆叶片对2甲4氯的吸收作用。
In the experimental conditions, MCPA can obstruct growing, make endocrine function disorder, and decrease the spleen weight of mice.
除草剂MACP在本实验条件下可导致雌性小鼠的生长发育障碍，甲状腺素合成障碍，内分泌功能失调，血胆固醇升高，且可使脾脏萎缩。
Methods The different doses of MCPA (20, 100, and 200 mg·kg-1. Weight. p. o) were given to the mice. The weight, the levels of T4, TSH, and cholesterol in serum, and the organ coefficient of spleen were analyzed.
根据经口LD50，分别以20、100和200 mg·kg-1的MCPA经口给雌性小鼠染毒，测定小鼠的体重，脾的脏器系数，血中甲状腺素（T4）、促甲状腺素及胆固醇含量。
MCPA; Super japonica rice; Liaoyou 5218; Applied study
二甲四氯；超级粳稻；辽优5218；应用研究
The result indicated that, 2, 4-D butylate and carbamide, MCPA and carbamide were mixed using in wheat field between return green period and draw blur period.
试验结果表明：2,4-D丁酯与尿素和2甲4氯与尿素在冬小麦返青、拔节期间合理混施，不仅可以促进小麦生长发育，改善农艺性状，提高小麦产量，且对杂草有良好的防除效果。
The degradation trends of MCPA, 2, 4 D and nitrofen in soils under the simulated conditions in the laboratory was performed.
在室内模拟条件下研究了2甲4氯、2,4-D和除草醚在土壤中的降解动态。
Experimental study on the acute toxicity and subchronic toxicity of MCPA in rats
2-甲-4-氯原药的急性和亚慢性毒性实验研究