碱性

Translation - urea characteristic The urea is one kind of achromatic color, tasteless, the odourlessness acicular or the orthogonal prism build crystallizes, in the actual production is granulated for the white or the tint; The granularity may be possible to be small greatly according to enterprise's characteristic; When heats up to 132.7℃ starts to melt, the solid urea density is 1.335g/cm 3, dissolves in the water and the few organic reagents, the urea assumes the alkalescency, may live the salifying with the acid function, when the temperature surpasses 60℃, the urea in the acid, the alkalinity or the neutral solution has the hydrolisis.

问题补充：尿素是一种无色、无味、无臭的针形或正交棱柱体形结晶，实际生产中为白色或浅色颗粒状；粒度则根据企业的特点可大可小；当加热到132.7℃开始熔化，固体尿素密度为1.335g/cm 3，溶于水和少量的有机试剂，尿素呈微碱性，可与酸作用生成盐，当温度超过60℃时，尿素在酸、碱性或中性溶液中发生水解。

Result: All the basic additives investigated in the experiment showed good potential to relieve the level of acid collection in the course of PLGA degradation. Among those, the relieving ability of NaHCO3 was in the top, basic amino acid in the moderate, while Algin and chitosan ranked lower. 5% addition of Lysine produced a best outcome.

结果：各种碱性添加剂都有一定的缓解酸度的能力， NaHCO3的缓解能力最强，海藻酸钠和壳聚糖的缓解能力较低，而碱性氨基酸的缓解能力适中；赖氨酸为5%时的添加量时能够得到较佳的综合调节缓解效果。

Materials and methods: The composite was respectively prepared by blending Lysine, Histidine, Arginine with PLGA, while the composite respectively prepared by blending Algin, chitosan, NaHCO3 with PLGA as the comparison and the pure PLGA as the control. All composites were degradated in tri-distilled-water at 37℃ for 7 weeks. The degradation property of PLGA with the addition of basic additives was investigated by using gross observation, the pH change of degradation solution and the mass loss ration of the composite.

材料方法：将赖氨酸、组氨酸、精氨酸分别各按5%和10%的比例与PLGA制成复合物，于体外在37℃下在三蒸水中进行降解2个月；通过总体观察、降解液PH的变化、复合物的失重率等指标来考察碱性氨基酸对PLGA体外降解特性的调节作用，同时将碱性氨基酸的调节效果与海藻酸钠、壳聚糖、碳酸氢钠的进行对比。

MAIN OUTCOME MEASURES: Results of alkaline phosphatase staining and alizarin red staining; Results from quantitative analysis of alkaline phosphatase and osteocalcin expression.

主要观察指标：碱性磷酸酶染色与茜素红染色结果，碱性磷酸酶和骨钙素定量分析结果。

With the change of pH value, the specific value of fluorescence intensity and the pH change are in linear correlation in a certain range of acidity and alkalescence.

并且随着pH的变化，在酸性和碱性的一定pH范围其荧光强度的比值与pH的变化呈线性相关，据此，可实现比率法测定酸性或碱性范围内的pH变化。

If this symptom appears ,you should adjust you r bite and sup ,do not take too much acid food ,take alkalescence food

有此现象时，请注意饮食的调节，勿食用过多的酸性食物，应多摄取碱性食物，每日的食用量为碱性四份、酸性一份。

Use low alkalescency system to protect hair from damage in high alkalescency environment.

使用低碱性体系，有效防止头发在高碱性环境中受到损伤。

The SiO〓 and K〓O contents of volcanic rock increase with time, and the series of volcanic rock develops from the transition between alkaline series and calc-alkaline series to calc-alkaline series.

随时代变新，火山岩的SiO〓和K〓O含量增加，TiO〓含量适中，变化不大；岩石系列由碱性与钙碱性过渡的系列向钙碱性系列演化。

The ore-bearing intrusive rocks are mainly alkaline and sub-alkaline series, high-K calc-alkaline series and shoshonitic series.

铜陵地区侵入岩岩石系列主要为碱性和亚碱性系列，高钾钙碱性系列和橄榄安粗岩系列。

In basic refining operations lime is added to the stock to form a basic slag, which can combine with phosphorus and sulphur, thus removing them from the metal.

在碱性法精炼过程中，炉料加有石灰，能生成碱性渣，而碱性渣能与磷，硫生成化合物，从而将磷和硫从钢水中除去。

In the United States, chronic alcoholism and hepatitis C are the most common ones.

在美国，慢性酒精中毒，肝炎是最常见的。

If you have any questions, you can contact me anytime.

如果有任何问题，你可以随时联系我。