查询词典 nitrate

Under nitrate-limited conditions the growth of Skeletonema costatum increased significantly due to its small cell size and lower demand for nitrogen, while the two dinoflagellate with large cell size increased slowly and resulted very low cell yields.

属于甲藻的微小原甲藻和塔玛亚历山大藻与属于硅藻的中肋骨条藻相比，具有较低的营养盐亲合力和比生长速率。

Two quick test methods (diphenylamine method and nitrate test strip) for diagnosising nitrogen nutritional status in spring wheat were studled in field expriment.

通过田间试验研究了两种快速诊断方法，二苯胺法和反射仪法在春小麦氮营养诊断中的应用。

A porous lanthanum-doped hydroxyapatite coating on commercially pure titanium was prepared by micro-arc oxidation in electrolytic solution containing calcium acetate,β-glycerol phosphate disodium salt pentahydrate and lanthanum nitrate.

采用微弧氧化法在含有乙酸钙、β-甘油磷酸钙、硝酸镧的电解液中在纯钛金属表面原位生成了多孔含La羟基磷灰石的生物涂层。

Objective To study the community of denitrifying bacteria and nitrate-nitrogen removal in downflow fixed-bed bioreactor.

目的研究下流式固定床反应器的脱氮效果及反硝化细菌群落结构。

Taking the stem from three varieties of Dracaena fragrans as a material, the effect of the factors such as the plant growth regulators, the different basal culture medium, silver nitrate, and the cultivation medium upon tissue culture regeneration were investigated.

以3个也门铁品种（金心也门铁、金边也门铁和普通也门铁）茎段为材料，研究了植物生长调节物质、基本培养种类、AgNO3、栽培基质等因素对其离体再生的影响。

According to the echocardiography,enlarged internal diameter of left ventricle was found in 8 patients and short-axis fractional shortening of left ventricle 5% in 3 patients.Six out of the above 8 patients presented with shortening of accerlerating time,decreasing of accerlerating time/right ventricular ejective time value and moving forward of spectral peak in different degrees.All patients were given antianginal drugs such as β-recepter blockers,nitrate preparations and part by angiotensin converting enzyme inhibitor,diuretics and digoxin,The illncss of 29 patients were gradually controlled within one week.Three patients with AD were complicated by acute left heart failure.No obvious changes in FS of left ventricle were found on echocardiography by bed.

测量肺动脉瓣口血流频谱，左心室内径增大的8例中有6例出现不同程度的血流加速时间缩短，血流加速时间/右心室射血时间比值减小，频谱峰值前移。31例均给予β受体阻滞剂、硝酸酯类等抗心绞痛治疗，部分给予血管紧张素转换酶抑制剂、利尿剂和地高辛，其中29例在1周内卧位型心绞痛逐步得到控制。3例卧位型心绞痛发作时合并急性左心衰竭者，在床旁观察超声心动图，发现左心室短轴缩短率无显著变化，给予利尿剂、减轻前后负荷等治疗，急性左心衰竭得以纠正。

The effect of hydrogen ion concentration on the lead dioxide electrodeposit was investigated by Diusman and Giaque using lead nitrate -nitric acid solutions in water.

Diusman与Giaque采用硝酸铅-硝酸水溶液研究了氢离子浓度对二氧化铅电沉积的影响。

METHODS On the basis of the animal model of traumatic DBI caused by free dropping,we measured the water content,the levels of TXB2,6-keto-PGF1α,cAMP and cGMP,and observed the changes of the blood-brain barrier permissibility by the Lanthanum Nitrate labeled electroscope to assess the protective effect of MCPG on the brain tissues after DBI in rats.

在自由落体致DBI模型的基础上，通过测定脑组织含水量、TXB2，6-keto-PGF1α，cAMP，cGMP等水平变化，以及应用硝酸镧标记电镜分析观察血脑屏障的通透性改变，探讨MCPG对DBI的保护作用及其机制。

It was travelling within Mexico, en route from an explosives plant to a mine, with a cargo of 25 tons of ammonium nitrate. The wreckage exploded in a giant fireball, killing more than 30 people.

这辆卡车正载着25吨硝酸铵行驶在墨西哥境内一个炸药厂通往一个煤矿的路上，爆炸形成了一个巨大的火球，造成至少30人死亡。

The anti-jamming ability of igniter depends on the charge in the igniter. The combustion of the igniter charged with barium nitrate and those charged with magnesium powder and PTFE is stable, while the igniter charged with zirconium hydride and lead oxide is unstable. The standard error of duration of the third kind of igniter flame is 523 ms ,and also its nozzle hole is blocked seriously.

不同药剂的点火具抗干扰性能不同，其中以硝酸钡为药剂主成分的点火具和以镁粉＋PTFE为药剂主成分的点火具燃烧性能稳定，以氢化锆、二氧化铅为药剂主成分的点火具工作稳定性较差，火焰持续时间标准差为523 ms，点火具喷孔堵塞严重。

Do you know, i need you to come back

你知道吗，我需要你回来

Yang yinshu、Wang xiangsheng、Li decang,The first discovery of haemaphysalis conicinna.

1〕 杨银书，王祥生，李德昌。安徽省首次发现嗜群血蜱。