二酸

The result of analysis by GC-MS was shown that fatty acid constituents of oat oil were myristic, palmitic, stearic, oleic, linoleic, linolenic and eicosenoic acids.

通过GC-MS分析，燕麦油的主要成分有豆蔻酸、棕榈酸、硬脂酸、油酸、亚油酸、亚麻酸、二十碳一烯酸。

Results13 compounds were identified, which accounted for 100 % of the essential oil of the skins of stem. The major compositions were n-Hexadecanoic acid (46.13%); Octadecanoic acid (15.44%),-9-Octadecenoic acid (13.73%), and-9,12-Octadecadienoic acid (7.79%).

结果通过计算机检索、图谱分析法鉴定出13种化合物，占总油量的100%，其主要成分为正十六烷酸(46.13 %)、十八烯酸(15.44 %)、-9-十八烯酸(13.73 %)及-9，12-十八碳二烯酸(7.79 %)。

Our study show that 9, 11-Octadecadienoic acid, methyl ester is the highest content of organic acid ester components in non-hydrocarbon fraction, higher content of 6-Octadecenoic acid, methyl ester reflects mainly terristrial source input, higher content of pentadecane acid, 14-methyl, methyl ester or Heptadeeanoic acid, 16-methyl, methyl ester shows mainly aquatic source input.

原油和岩石抽提物非烃中有机酸酯类化合物的有机地球化学研究报道很少，系统研究发现非烃有机酸酯中9，11-十八二烯酸甲酯含量最高，而次高峰的丰度可用作生源判识，陆源母质输入多的样品次高峰为6-十八单烯酸甲酯，水生母质供给多者次高峰为14-甲基十五烷酸甲酯或16-甲基十七烷酸甲酯。

Twenty-seven compounds were isolated from the methanol extract of the stems of Pinus massoniana by means of chromatographic methods, and their structures were elucidated as 8(14),15-Pimaradien-19-oic acid (1), Pimaric (2), Podocarpic acid (3), 12-Hydroxydehydroabietic acid (4), Dehydroabietic acid (5), 15-Hydroxydehydroabietic (6), 3β-Methoxyserrat-14-en-21-one (7), 3β-Hydroxy- serrat- 14-en-21-one (8), 3β-Methoxyserrat-14-en-21-one-30-al (9),(24R)-Stigmst- 4-ene-3-one (10),β-sitosterol (11),-3-Hydroxy-5-methoxy-stilbene(12), 4-Hydroxy-3- methoxycinnamaldehyde (13),-Ferulic acidtetracosyl ester (14), Alkylferulates (15), Pinocembin (16), Coniferaldehyde (17), Matairesinol (18),-Nortrachelogenin (19), Balanophonin (20), Cedrusin (21),-Pinoresinol (22), Tanegoside (23), 1,2-Bis-(4-hydroxy-3- methoxyphenyl)-propane-1,3-diol (24),(1S*, 2S*)-1-(4- Hydroxyphenyl) glyceri...

同时对马尾松枝条的甲醇提取物利用各种色谱技术进行了分离纯化，并利用现波谱技术鉴定了27个化合物的结构，分别为：8(14)，15-Pimaradien-19-oic acid (1)、海松酸(2)、罗汉松酸(3)、12-羟基脱氢松香酸(4)、脱氢松香酸(5)、15-羟基-脱氢松香酯(6)、3β-甲氧基-锯齿石松-14-烯-21-酮(7)、3β-Hydroxyserrat-14-en-21-one (8)、3β-Methoxyserrat-14-en-21– one-30-al (9)、(24R)-豆甾-4-烯-3-酮(10)、-3-羟基-5-甲氧基-二苯乙烯(12)、4-Hydroxy-3-methoxycinnamaldehyde (13)、-Ferulic acidtetracosyl ester (14)、Alkylferulates (15)、Pinocembin (16)、Coniferaldehyde (17)、罗汉松树脂酚(18)、 Balanophonin (20)、tanegoside (23)、1，2-Bis-(4-hydroxy- 3-methoxyphenyl)-propane- 1，3-diol (24)、(1S*，2S*)- 1-(4-hydroxyphenyl)glycerins (25)、(1R*，2R*)-1-(4-hydroxy- phenyl)gly-cerins (26)和赤松素(27)。

Methods This study contained a total of 16 culture groups, including one group as control and 5 groups treated by 5 drugs (calcium L-threonate, sodium L-threonate, alendronate, 17β-estradiol and calcium gluconate) each at the final concentrations of 10^(-9)mol/L, 10^(-7)mol/L, 10^(-5)mo1/L respectively. After 7 days, eight bone slices of every group were stained with toluidine blue and the areas of resorptive pits were analyzed under light microscope; the concentrations of C-telopeptide of type Ⅰ collagen CT(subscript x or Crosslaps in culture supernatants were measured by ELISA.

制备骨磨片，培养OC，并分别加入高中低浓度10^(-5、10^(-7)、10^(-9)mol/L的L-苏糖酸钙、L-苏糖酸钠、阿仑麟酸钠、17β-雌二醇、葡萄糖酸钙，实验设以上各浓度组及对照组（共16组，每组n=8），甲苯胺蓝染色一光镜观察分析骨片上骨吸收陷窝面积，ELISA测定上清液Ⅰ型胶原C-末端肽（CTx或Crosslaps）浓度。

Study on technics of synthesize dimethyl fumaricate, firstly prefabricated fumaric acid, with furfural as raw material, V2O5 as catalyst and potassium chlorate as oxidizer then synthesized dimethyl fumaricate through esterication of fumaric acid and methanol with phosphor tungstenic acid as catalyst.

研究了以糠醛为原料，V2O5作催化剂，用氯酸钾氧化制取富马酸，然后以磷钨酸为催化剂，用甲醇进行酯化合成富马酸二甲酯的合成工艺。

Their structures were characterized as usnic acid,evinic acid,perlatolic acid,olivetoric acid,2-hydroxyl-4-methoxyl-6-pentyl benzoic acid and 2,4-dihydroxyl benzoic acid,respectively.

结果从太白花的石油醚部分得到6个化合物，分别鉴定为：松萝酸、去甲环萝酸、珠光酸、漂红梅衣酸、2-羟基-4-甲氧基-6-正戊基苯甲酸和2，4-二羟基-6-正戊基苯甲酸。

The new acid system can stabilize the ferric ions, furthermore it can prevent the acid sludge forming during acidizing treatment, also can eliminate sulphide scale.

实验表明螯合酸对于高含碳酸盐岩砂岩储层具有很好的酸化效果，对于高含酸敏性矿物而碳酸盐岩含量较低的砂岩储层酸化效果有限，但不会给储层带来二次伤害。

By using catalysts based on sodium nitrite, hydrochloric acid and sodium nitrite, cerium dioxide and sodium nitrite, and cupric nitrate and sodium nitrite correspondingly.

结果表明，用亚硝酸钠作催化剂乙醛酸产率为73.9%，盐酸和亚硝酸钠作催化剂时乙醛酸产率为84.6%，二氧化铈和亚硝酸钠作催化剂时乙醛酸产率为80.2%，硝酸铜和亚硝酸钠作催化剂时乙醛酸产率为78.2%。

In this research, liposoluble chlorogenic laurate was synthesized by the acylation with lauroy chloride in the existence of alkali catalyst in non-water phase, and yellowish CGL powders with a yield of 81.24% were obtained under the optimal synthesis conditions determined via single-factor tests and orthogonal experiments, that is, carrying out the acylation at 35℃ for 8h with a n:n: n ratio of 1:1:1.5 and with dimethylformamide as the solvating agent and the thinner.

文中对绿原酸进行了改性，即在碱性催化剂催化的条件下使其与月桂酰氯进行非水相的酯化反应，得到了脂溶性的绿原酸月桂酸酯。经过单因素及正交试验，确定了最佳合成条件为：以N，N-二甲基甲酰胺作为溶解、稀释剂，绿原酸／月桂酰氯／三乙胺的摩尔比为1：1：1.5，温度控制在35℃，反应时间8h。

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。