挥发性酸

采用挥发性酸和碱调节鲜笋壳压榨液pH值，分别获得无盐FractionⅠ和fractionⅡ；

Using volatile acid and alkali to regulate the pH of pressed juice from bamboo shell , saltless Fraction ⅰ and Fraction ⅱ were got separately .

三氟乙酸一种强挥发性酸，可以利用蒸馏的方式直接回收。

TFA is a strong volatile acid , can be recovered by distillation .

这样当非挥发性酸产生时，就要消耗HCO3-，产生CO2并由肺脏排出体外。

Thus , when a non-volatile acid is produced , HCO3-is consumed and CO2 is produced and exhaled by the lungs .

顶空气相色谱质谱法快速测定液体食品中的挥发性酸

Analysis of Volatile Acids in Food by Headspace Gas Chromatography-Mass Spectrometry

病理生理过程可以大幅度地提高非挥发性酸的产量。

Path physiologic processes have the potential to increase non-volatile acid production dramatically .

但如果葡萄酒酸度太大，尝起来就会非常尖酸，闻起来也会有很重的挥发性酸气。

Wine that contains too much acidity will have a nasty biting vinegary and sour taste .

在采食后0、2、4、6和8小时采集瘤胃液样本立即测定瘤胃液的氨浓度和pH值，随后测定挥发性脂肪酸和尿素氮含量。

Ammonia concentration and pH value of ruminal fluid were measured immediately at 0,2,4,6 and 8h after feeding .

国内外部分白肋烟烟叶中非挥发性有机酸、高级脂肪酸、生物碱及pH值的对比分析

Analysis of nonvolatile organic acids , high fatty acids , alkaloids and pH values of some domestic and foreign burly tobaccos

填埋场中pH的变化对填埋臭气中氨气和挥发性脂肪酸气体的影响很大。当pH大于7时，臭气中以氨气为主，基本上不存在挥发性脂肪酸气体；

The pH of landfill will affect the concentration of ammonia and volatile organic acid of the rotten gas of the landfill distinctly .

当pH小于7时，臭气中以挥发性脂肪酸为主，而氨气几乎不存在。

When pH > 7 , NH3 was the main composition of the bad smelly gas and the volatile organic acids was hardly examined ;

在悬浮污泥系统中，当以挥发性脂肪酸为碳源时，适宜的pH值是7.5。

N the suspended sludge system , when VFA were used as carbon source , the optimal PH was equal to 7.5 and when the PH values were diverted .

本试验研究了日粮添加益生菌制剂对断奶仔猪的生产性能、免疫指标、肠道形态结构、pH值和挥发性脂肪酸的影响。

This experiment was conducted to study the effects of probiotic preparation on growth performance , immune indexes , morphology , pH Valus and Volatile Fatty Acids of weaner piglets .

把烟草中的有机酸衍生化后，用GCMS分别分析了烟丝干冰膨胀前后挥发性有机酸和非挥发性有机酸的含量。

Volatile organic acids and non volatile organic acids from the dry ice expanded tobacco were determined by derivation of organic acids and GC MS analysis .

当渗沥液的初始pH为5时，冷凝液主要成份为挥发性有机酸和低碳醇类物质，不含氨氮；

When the initial pH value of LRSP was 5 , the condensate mainly contained the volatile fat acids ( VFA ) and low molecular weight alcohols and nearly no ammonia .

探讨了使用高温厌氧微生物处理有机废水的机理以及温度、pH值、有机负荷、挥发性脂肪酸、微生物载体等对有机废水处理工艺过程的影响。

The mechanism of thermophilic anaerobic treatment of organic wastewater and the influence of temperature , pH , loading rate , volatile fatty acid and the carrier on the degradation process are discussed .

挥发性脂肪酸（VFA）是厌氧反应器运行中重要的控制指标。

VFA is a very important control index in the anaerobic reactor operation .

结果表明：①阴离子饲粮对瘤胃发酵pH值、氨态氮浓度、总挥发性脂肪酸浓度、主要挥发酸的摩尔比例均没有显著影响（P>0.2）。

The results showed that ① ruminal fermentation parameters including rumen pH , concentrations of ammonia nitrogen and total VFA , and individual VFA molar percentages , except isovaleric , were unaffected ( P > 0.2 );

本文主要讨论了日粮精粗比对奶牛瘤胃内环境的影响，包括对瘤胃细菌菌群数量、瘤胃pH值、瘤胃内容物稀释率和外流速度、氨态氮浓度以及挥发性脂肪酸的影响。

The effects of forage to concentrate ratio on rumen bacteria , pH value , rumen fluid dilution rate ( FDR ), ammonia ( NH3-N ) and volatile fatty acids ( VFA ) were reviewed in the article .

从动力学常数以及挥发性脂肪酸（VFA）的积累情况来看，随着染料浓度的增加，外加基质的降解会受到抑制。

The kinetic constants and VFA accumulation in reactors showed that substrate degradation could be inhibited by increased dye concentrations .

COD去除率约70%，在厌氧反应器运行过程中，应注意出水挥发性脂肪酸VFA浓度的监测。

The removal rate of COD is about 70 % ; the concentration of volatile fatty acid should be monitored in the anaerobic treatment of the wastewater .

ISCA对瘤胃挥发性脂肪酸代谢及纤维素降解率的影响

Effect of ISCA on volatile fatty acid and cellulose disappearance in rumen

挥发性脂肪酸（VFA）是消化污泥上清液（DSS）中主要的组分。DSS是反硝化很好的碳源。

Volatile fatty acids ( VFA ) are main constituents of di - gested sludge supernatant ( DSS ) and DSS is a good carbon source for denitrification .

适当地增加循环流量，可以减轻水解反应器的酸化程度，避免挥发性脂肪酸（VFA）的积累对水解微生物的活性产生抑制。

Increase in recycling flux would alleviate acidification degree in the hydrolytic reactor and decrease volatile fatty acids ( VFA ) accumulation .

奶牛粪肥的有机酸以不挥发性有机酸为主，总酸量最高可达2938cmol/kg，DW；

The organic acids in the dairy manure is mainly composed by no volatilization acids , the highest content of acids is 28 38cmol / kg , DM .

结果表明，温度突降后，产气量几乎降为0，总挥发性脂肪酸（VFA）和乙酸、丙酸含量快速积累，pH值也随之下降。

The results show that the biogas production almost stop and total VFA , VFA such as acetate and propionate are rapidly accumulated when the temperature fluctuated , accompanied by the fall in pH.

采用完全混合厌氧消化工艺处理城市垃圾，分析在不同条件下pH值和VFA（挥发性脂肪酸）的变化过程。

The complete mix anaerobic digestion system was used to treat municipal solid waste ( MSW ) . The pH value and the VFA ( volatile fat acid ) were analyzed under different conditions .

结果表明，进水中的碳源特别是挥发性脂肪酸（VFA）不足和厌氧水力停留时间（HRT）太短是导致脱氮除磷效果不佳的主要原因。

The results show that lack of carbon source , especially VFA , in the influent and shorter anaerobic HRT are key factors to limit nutrient removal .

挥发性脂肪酸（VFAs）是污泥厌氧水解过程的重要产物，是一种易生物降解的有机物。

Volatile fatty acids ( VFAs ) are important intermediate products of sludge anaerobic hydrolysis and are biodegradable carbon sources .

结果显示，pH值范围为5.014.71，挥发性有机酸的增长率范围为-11%408.3%、挥发性固体的降解率范围是27.3%46.3%、基于表面降解动力学常数范围是1.081.4。

The results show that the Volatile acid increasing ratio ( VA , as acetic acid ) ranged from - 11 % to 408.3 % , volatile solid ( VS ) degradation ratios of 27.3 % to 46.3 % and pH values of 4.71-5.01 were obtained .

挥发性脂肪酸（简称VFA）对环境酸度的敏感程度要远大于pH值，VFA更能准确快速地反映出反应器内部环境的变化。

The sensitivity of volatile fatty acid ( VFA ) to environment acidity was much greater than pH value , so VFA could reflect the environmental change inside the reactor more accurately and quickly .