一酸的

A nitrogenous organic acid, C4H9N3O2, that is found in the muscle tissue of vertebrates mainly in the form of phosphocreatine and supplies energy for muscle contraction.

肌酸一种含氮的有机酸，c4h9n3o2，主要以磷酸肌酸的形式发现于脊椎动物的肌肉细胞组织中，并可为肌肉萎缩提供能量

The accumulation of proline was considered to be one of the adjustments that block the entering process.

而脯胺酸的增加，可能是其中的一种阻挡机制，但是脯胺酸的增加是否与重金属进入植体有关，尚无定论。

The current developments were summarized and the research contents of this thesis were described.In the second chapter, a simple procedure is described for the simultaneous extraction and determination of betulin and betulinic acid in white birch bark. To compare extraction efficiency, effect of white birch bark growing in different locations and different extract solvents on the content of betulin and betulinic acid were evaluated.

第二章建立了一种简单、准确度、灵敏度高和重现性好的RP-HPLC同时测定白桦树皮中白桦酯醇和白桦酯酸含量的方法，并用这种方法研究了提取溶剂以及产地对树皮中白桦酯醇和白桦酯酸的含量影响，确定了最佳的提取工艺。

To explore their catalytical capability, the esterification of phenyl formate and 1-butanol was chosen. It is found that the esterification yield exceeds 80%, which demonstrates the heteropoly acid has higher catalytic activity.

为了探索所得杂多酸的催化性能，考察了H_4PMo_(11)VO_(40)对苯甲酸和正丁醇酯化反应的催化效果，发现在最佳条件下酯收率达到80％多，证明其为一种较好的酸催化剂。

Crotonic acid can be made by crotonaldehyde oxidized,and crotonaldehyde widly exists asthe accessory substance in the chemical enterprises that produce and use aldehyde.

丁烯酸可由丁烯醛氧化制得，而丁烯醛在生产和使用乙醛的化工企业作为副产物广泛存在，是一种需治理的废弃物，我国具有生产丁烯酸的原料条件。

A novel one-step green process for synthesis of glutaric acid by selective oxidation of cyclopentene was investigated.

研究了以环戊烯为原料、草酸为有机络合剂、H2O2为氧化剂，在催化剂钨酸(H2WO4)的作用下一步合成戊二酸的绿色新过程，考察了氧化剂的含量、反应物配比、催化剂用量、反应温度、反应时间等对反应的影响。

It improves the using rate of phosphorus in feeds , decreases the environment pollution of excretive phosphorus and debases the anti-nutritious function of phytates .

植酸酶作为一种单胃动物的饲料添加剂，可以提高植物饲料中磷的利用率，减少磷排泄对环境的污染，同时还能降低植酸的抗营养作用。

The results showed that soil organic carbon, water-soluble organic carbon and humin decreased gradually. Extracted humic substances presented an increasing trend at first and then decreased. Relative proportion of humic acid in HE decreased at first and then increased during the initial stage of corn stalk decomposition, which indicated that the formed rate of fulvic acid was faster than HA. Then PQ dropped gradually and reached stabilization, which indicated that FA and HA transformed into each other for some time and then reached balance.

研究结果表明：随着培养时间的延长，土壤有机碳、水溶性有机碳、胡敏素逐渐减少，可提取腐殖物质先增加后下降，可提取腐殖物质中胡敏酸的相对比例则在玉米秸秆分解初期表现为先减少后增加、最后趋于稳定，表明富里酸和HA经历了一段相互转化的过程后达到了动态平衡。

The hybrid composite PW11Co/PAMAM was characterized by FT-IR, UV-Vis diffuse reflectance spectra, XPS, XRD and TG/DTA, indicating that the PW11Co was chemically anchored to PAMAM. The morphologies of the title composite were characterized by scanning electron microscopy and transmission electron microscopy. The catalytic activity was evaluated by oxidation of isobutyraldehyde to isobutyric acid in MeCN under mild conditions (20 ℃, ambient pressure), showing that the title compound is a more effective and recoverable catalyst than corresponding PW11Co.

通过FT-IR、DR-UV-Vis、XRD、TEM、SEM、TG/DTA等手段对其进行了表征，并考察了其对异丁醛转化异丁酸的催化活性，实验结果表明，多金属氧酸盐通过配位键与聚酰胺-胺作用形成的无机-有机复合物可望成为一种催化活性高且易于分离和重复使用的多相催化剂。

In this thesis, we describe a facile and economical synthesis of-abscisic acid from keto-isophorone and 3-butyn-2-ol through ketalization, oxidization, Witting-Horner reaction, reduction with chromium sulfate and other steps in 13% total yields. Compared to the previous routes, the starting materials are more commercially available and cheaper and the synthetic process is more easily controlled in our method, but the yield of this route is still to be improved.As to isostere principle, cyclopropyl and methyl vinyl are a couple of isostere.

本论文设计并完成了一条全新的外消旋脱落酸(1)全合成路线，从廉价的工业原料氧化异佛尔酮和丁炔醇出发，经过缩酮化反应、氧化反应、Wittig-Horner反应、CrSO_4选择性还原反应以及水解等七步反应实现了脱落酸的全合成，总产率达13％，与以往路线相比，该路线所用试剂廉价、合成路线简单，但产率有待提高。

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。