硝酸

Calcium sprays were effective ifdone correctly, and our results indicated both calcium nitrate and calciumchloride were effective calcium sources Fig.

我们试验结果显示硝酸钙和氯化钙是十分有效的钙来源。

Surface tension of water and saturated calcium hydroxide solution which added sodium chloride,calcium chloride,sodium sulfate and calcium nitrate were tested by ring method to study the effects of these salts on concrete performance.

为研究混凝土中常用的无机盐类外加剂对混凝土性能的影响，采用吊环法测试了不同浓度氯化钠、氯化钙、硫酸钠和硝酸钙水溶液和饱和氢氧化钙溶液的表面张力。

Evidence is growing showing that oxalate may play an important role in plant biology such as cation ion balance, calcium regulation, nitrate and ferric reduction etc.

越来越多的证据表明草酸在植物中具有重要生物学功能：早期的研究表明它能在植物细胞阳离子平衡中起作用；草酸钙在细胞中的可逆性形成/分解可有效调节细胞中的Ca2+浓度；它还能促进植物硝酸还原和铁还原。

Many growers spend considerable time choosing among sidedressers such as calcium nitrate, sodium nitrate, 30 percent UAN liquid, and 24S UAN liquid.

许多种植者花费了相当多的时间选择侧施肥料，比如硝酸钙、硝酸钠、30％的UAN液体肥料和24S的UAN液体肥料。

The effect of calcium nitrate on relative physiological parameters of muskmelon softness was studied. The regulation measures of prolong fruit shelf-life were explored to provide theoretical basis for calcium use to prolong the optimal edible phase and shelf-life, and to learn the mechanism of calcium delaying the process of ripening and senescence.

研究硝酸钙对网纹甜瓜果实软化及其相关生理因素的影响，探讨延长网纹甜瓜货架期的调控措施，为生产上利用钙来延长网纹甜瓜的最佳食用期和货架寿命提供理论依据，并为进一步探明钙减缓果实成熟衰老的机制奠定基础。

The results showed that calcium nitrate treatment apparently slowed down the consenescence rate, made the flesh firmness higher than the control, elevated the activities of POD, SOD and CAT, retarded the ethylene production, reduced the soluble protein content, and declined the increased speed of electrical conductivity and LOX activity.

结果表明：硝酸钙具有明显延缓甜瓜果实衰老的作用，使果肉硬度显著高于对照，并提高过氧化物酶、超氧化物歧化酶和过氧化氢酶活性，同时降低果肉乙烯释放量、可溶性蛋白含量、外渗电导率的升高速度和脂氧合酶活性的作用。

The main conclusions are as following:(1) Befor the frozen depth reach to the maximum, the frozen depth of different treatments of groundwater, 0.6% of calcium nitrate, 0.6% of potasium sulphate and no irrigation are 132 cm, 130 cm, 129 cm and 108cm in sequence respectively.

得到的主要结论如下：(1)不同冬灌水质处理在冻深达到最大以前，采用地下水灌溉的处理最大冻深最大，为132cm，冻结速率最高，为1.16cm·d~(-1)；加入0.6%的硝酸钙的处理最大冻深次之，为130cm，冻结速率为1.13cm·d~(-1)；加入0.6%的硫酸钾的处理最大冻深排第三，为129cm，冻结速率为1.10cm·d~(-1)；自然条件下未灌溉处理的最大冻深第四为108cm，冻结速率为0.94cm·d~(-1)。

Methods According to matching principle,60 patients with hypertension and diabetes merging IR and ED were divided into 2 groups:routine group (n=30 cases) treated with calcium antagonist,diuretic,nitrate,hypoglycemic agents and etc; losartan group (n=30 cases) given an additional use of losartan besides the above...

方法将60例高血压糖尿病合并IR、ED患者按匹配原则分成两组，常规组30例患者使用钙离子拮抗剂、利尿剂、硝酸酯类制剂、降糖药物等治疗；缬沙坦组30例患者在上述常规治疗基础上，加用缬沙坦80mg/d。

Nitric acid oxidation was found to reduce the surface hydroxyl groups in increasing the carboxylic acid groups.

硝酸氧化减少了碳纤维表面的羟基含量，同时增加了碳纤维表面的羧基含量。

Nitrite is also used in food preservation, in fact it is also carcinogenic.

亚硝酸也用于食品保鲜，实际上它也是致癌物质。

According to the clear water experiment, aeration performance of the new equipment is good with high total oxygen transfer coefficient and oxygen utilization ratio.

曝气设备的动力效率在叶轮转速为120rpm～150rpm时取得最大值，此时氧利用率和充氧能力也具有较高值。

The environmental stability of that world - including its crushing pressures and icy darkness - means that some of its most famous inhabitants have survived for eons as evolutionary throwbacks, their bodies undergoing little change.

稳定的海底环境─包括能把人压扁的压力和冰冷的黑暗─意谓海底某些最知名的栖居生物已以演化返祖的样态活了万世，形体几无变化。