酸值

The results showed that the yield of pentose in pre-extraction is 27%~43%,which indicates that hot water pretreatment is effective for extracting hemicelluloses hydrolytic sugars.

木片经热水预处理后，碱法制浆性能提高，易成浆，可降低用碱量，缩短蒸煮保温时间，而且与原木片碱法制浆相比，相近蒸煮条件下浆料卡伯值下降 7~10 个百分点，浆料己烯糖醛酸含量下降 75%~95%，原浆白度升高 4~6 个百分点，黏度有小幅度降低，得率下降 1.5~4.5 个百分点。

Based the optimized batch-fermentation condition, it was confirmed that the DE of cassavahydrolysate in the fed batch culture was 80, 4%(NH4)2SO4, adding fed batch culture four times 36hours after the fermentation beginning, and 1.5 hours of fed interval, were the optimized fed-batchfermentation conditions, by studying the culture composition, method, original time and interval offed batch, and some main parameters of the citric acid fermentation, such as citric acid yield, invertrate, fermentation periods and residual glucose.

在批式发酵优化条件的基础上，通过对补料液的组成、补料方式、流加起始时间、流加间隔时间等对柠檬酸发酵过程的主要参数，如产酸率、转化率、发酵周期、残糖等的影响进行了研究，确定了柠檬酸补料发酵的优化条件，即：补料液中木薯糖化液的DE值为80，加入0.04%(NH4)2SO4；发酵36h小时开始分四次流加补料液，流加的间隙时间为1.5小时。

ResultThe results showed that it had good results of removal heavy metal ions fromwastewater using chaff xanthogenate whenthe pHvalue was neutral or alkaline,the reactiontemperature was 40℃.Ions concomitance was goodfor removal heavy metal ions.

结果结果表明，在pH值为中性或碱性，反应温度为40℃时，谷壳黄原酸盐对重金属离子具有较好的捕集效果；离子共存有利于重金属离子的捕集。

At experimental equilibrium volume, the total energy of CaTiO〓 increased with the displacement of Ti along [001] direction and the lowest energy point is always at zero displacement of Ti. However, with a 10% volume expansion, the displacement of Ti along [001] direction results in a shallow, but well-defined double energy well and ferroelectricity appears.

钛酸钙在实验晶胞体积下，钛离子沿[001]方向的位移不会引起总能量的降低，当体积膨胀10％时，钛离子的位移会引起系统的总能量的降低，在一定的位移时总能量呈现极小值，即出现铁电性。

Stability of the paste of modified starch was improved.

其中植酸钠用量和pH值是主要的影响因素。

Many test parameters proposed in these methods have widely accepted in the literature for sample pretreatment, tem-perature, enzyme dose, pH, and reaction time. This study used sodium arsenate (Na2HAsO4E7H2O) and NIST 2710 soil as the standards to investigate the effect of mixing intensity, liquid to solid ratio, extraction time, and extract pretreatment methods for the determination of bioavailability.

文献中对於体外试验操作参数与程序，如样品前处理、温度、酵素添加量、胃肠相pH值与反应时间等参数已渐趋一致，本研究针对尚未深入探讨之重要参数进行试验，以砷酸钠(Na2HAsO4.7H2O)与标准土让(NIST 2710 soil)，探讨蠕动强度、液固比、小肠相萃取时间以及萃取液前处理方式对生物有效性之影响。

Silver grass is weakly acidic, pH value is between 5.53 and 6.49, alkali buffer capacity is between 0.89ml and 3.31ml and acid buffer capacity is between 11.52ml and 17.38ml; To the wet ability of silver grass, the under-parts of stem are better than upsides, the inner surface of stem is better than surface, the wet ability of leaf is between surface and inner surface; compare with wood and wheat straw, the wet ability of silver grass is worse than that of wood but better than that of wheat straw.

荻草的化学成分主要是由纤维素、半纤维素、和木质素以及抽提物组成，在不同部位，各个化学成分的含量也不相同；荻草呈弱酸性，pH值在5.53～6.49之间，荻草的碱缓冲容量在0.89ml～3.31ml之间，酸缓冲容量在11.52ml～17.38ml之间；荻草茎秆下部的润湿性好于上部，荻草茎秆内表面的润湿性要好于外表面，荻草叶子的润湿性介于内外表面之间，与木材相比，荻草的润湿性不如木材，但要好于麦草；荻草茎秆下部的纵向抗拉强度要高于其上部，热处理15分钟后，茎秆下部的强度有所下降，茎秆上部有所提高，并没有表现出水热处理后荻草单元强度突然骤降的结果

While the sample was dissolved in nitric acid and hydrofluoric acid, the silicon in sample was removed through evaporating in the form of silicon fluoride. As a result, the matrix interference was eliminated, and meanwhile the high blank value as well as the influence on the life span of graphite tubes due to perchloric acid was avoided.

使用硝酸和氢氟酸消解样品，使硅生成氟化硅蒸发掉，消除了基体的干扰，也避免了使用高氯酸作为消解试剂所引起空白值高及对石墨管寿命的影响。

Extracting oat oil with aceton,petrobenzine,ethano-aceton and n-hexne from oat,determining quality of physical and chemic about acidity value ,iodic value,saponification value,unsaponification,colour and melting point,analysis on composition of fatty acid on oat oil.

分别以乙醚、丙酮、丙酮-乙醇、正己烷对燕麦进行萃取，对所得油脂进行酸价、碘价、皂化值、不皂化物、色泽、熔点等理化性质的测定，同时对燕麦油的脂肪酸组成进行分析。

It is found that a severe acid-rain band is formed along the southern-north direction of Nanchang-Yingtan-Linchuan-Jian-Ganzhou in the Province,taking a shape of "r".

提出了矿山废石堆的硫化矿物是造成严重酸雨的主要致酸物质来源，揭示了江西省降雨pH值随副热带高压脊季节性南北推移而变化的规律。

The split between the two groups can hardly be papered over.

这两个团体间的分歧难以掩饰。

This approach not only encourages a greater number of responses, but minimizes the likelihood of stale groupthink.

这种做法不仅鼓励了更多的反应，而且减少跟风的可能性。