羟基酸

Single chain bolaamphiphile containing cinnamyl moiety [4-(ω-hydroxydecanyloxy)(ω-hydroxydecanyl) cinnamate, abr. HDC] was designed and synthesized.

制备了一种含肉桂酸基团的Bola型两亲分子HDC4-(10-羟基癸氧基-10-羟基癸氧基肉桂酸酯。

It is seen that oxygen group function of additives is very remarkably in tribological characteristics, that is EP property of dihydroxy docosanoic acid without active element is very near to that of SO with active element sulfur.

双羟基廿二酸的极压性与不含氧基团的硫化烯烃十分接近，以液体石蜡为基础油，最大无卡咬负荷P〓值，前者为539N，后者为588N，再者相差49N，可以看出，氧基团的作用是十分显著的，即无活性元素的双羟基廿二酸的极压性可以十分接近于含活性元素的抗磨极压剂硫化烯烃。

Two oleanane type triterpenes were isolated from the crude drug Lu Lu Tong , the fruits of Liquidambar formosana and their structures were elucidated as 2α,3β dihydroxy 23 norolean 4(24), 12(13) dien 28 oic acid(1), 2α,3β,23 trihydroxyolean 12(13) en 28 oic acid(2), based on 13 C NMR, DEPT, 1H NMR, 1H 1H COSY, 13 C 1H COSY, IR, MS and elemental analysis.

从生药路路通分离得到2个齐墩果烷骨架的五环三萜类化合物。通过13CNMR，DEPT，1HNMR，2D1H－13CCOSY，2D1H－1HCOSY，IR，MS和元素分析阐明了它们的结构。（1）为2α，3β－二羟基－23－去甲－齐墩果－4（24），12（13）－二烯－28－羧酸，（2）为2α，3β，23－三羟基齐墩果－12（13）－烯－28－羧酸，（1）未见文献报道，（2）是首次从这一植物中分离得

The recombinant hygrophilous aeromonad producing copolymer PHBHHx of HB and HHx contains beta-keto thiolase gene phhA and acetoacetyl-CoA reductase gene phhB.

本发明公开了一株产3-羟基丁酸和3-羟基己酸的共聚物PHBHHx的重组嗜水气单胞菌及其构建方法与应用。

MAIN OUTCOME MEASURES: In vivo degradation performance and ossific capability of PHBV copolymer as well as energy-dispersive X-ray analysis and elemental quantitative assay in bone defect regions.

主要观察指标：①聚羟基丁酸/羟基戊酸共聚酯的体内降解性能和成骨能力。②骨缺损区X射线能谱分析及元素定量测定。

After introduction of reaction mechanism of LHE water stabilizer containing polyhydroxy carboxylate in CW system and applications in other chemical plants,the author analyzes the feasibility introducing this kind of stabilizer into CW system in nitric acid plant of Sichuan Chemical Co.

介绍LHE聚合羟基羧酸盐水质稳定剂的作用机理以及在其他化工厂循环水系统中的应用实例，设想将LHE聚合羟基羧酸盐水质稳定剂用于我公司硝酸厂循环水系统，将表冷液治理后低浓度氨氮淡水作为循环水系统的补充水，达到氨氮零排放。

In leaf tissue of Arabidopsis, the most abundant hydroxycinnamic acidphenolics are sinapate esters, and the most abundant flavonoids are kaempferol derivatives.

拟南芥药用成分主要有酚类化合物，即羟基苯丙烯酸酚类化合物的芥子酸酯，黄酮类化合物的4，5，7-三羟基黄酮衍生物，芥子酸酯与这种黄酮类化合物具有优良的减少紫外线危害和抗氧化作用。

Some typical newly catalysts, such as sulfoacid, inorganics, solid superacids, etc on the reaction of p-hydroxybenzoic esters was summed up especially introduce heteropoly acid catalyst.

总结了磺酸、无机物、固体超强酸等几种典型的合成对羟基苯甲酸酯反应的新型催化剂，重点介绍了杂多酸催化合成对羟基苯甲酸酯。

Butyl p-hydroxybenzoate was synthesized from p-hydroxybenzoic acid and butanol with sulfoacid resin as catalyst. The optimum conditions were as follow: ratio of n-butanol, p-hydroxybenzoic acid and sulfonic acid resin was 0.25 mol ∶ 0.05 mol ∶ 1.5 g, refluxing for 5 h using water separator at the reflow reaction temperature.

摘 要：以对羟基苯甲酸和丁醇为原料，用磺酸树脂作催化剂，催化合成了尼泊金丁酯，优化反应条件为：n∶ n=5 ∶ 1，催化剂磺酸树脂的用量为对羟基苯甲酸质量的21%，反应温度为回流温度，反应时间为5 h。

A convenient method to synthesize three kinds of novel 2-(2-hydroxyphenyl) benzimidazole in order to improve the solubilities of the fluorophores with substituent of carboxyl, ester and double-bond which are aimed for determining the sulphydryl group was reported.

合成了N-{3-(2-苯并咪唑基)-4-羟基苯基}马来酰亚胺酸， N-{3-(2-苯并咪唑基)-4-乙酸酯基苯基}和马来酰亚胺N-{3-(2-苯并咪唑基)-4-羟基苯基}马来酰亚胺，在基本荧光发射团上分别引入了羧酸基；酯基；双键活性基团。

With Death guitarist Schuldiner adopting vocal duties, the band made a major impact on the scene.

随着死亡的吉他手Schuldiner接受主唱的职务，乐队在现实中树立了重要的影响。

But he could still end up breakfasting on Swiss-government issue muesli because all six are accused of nicking around 45 million pounds they should have paid to FIFA.

不过他最后仍有可能沦为瑞士政府&议事餐桌&上的一道早餐，因为这所有六个人都被指控把本应支付给国际足联的大约4500万英镑骗了个精光。