二酸

To improve the cyano reactivity, cyano-terminated PPENs were prepared by the end-capping reaction of PPEN-OL with CBN; benzonitrile terminated polys were also prepared by the polycondensation of excess 4,4'-oxydianiline with 1,2-dihydro-2-(4-carboxyphenyl)-4-[4-(4-carboxyphenoxyl)phenyl]-phthalazinone, followed by end-capping with CBA. The polymers synthesized exhibited good solubility in NMP, DMAc and DMF, and were crosslinked to afford phenyl-s-triazine-containing polymers under the similar conditions.

为提高氰基活性，以对氯苯腈为原料，对PPEN-OL进行封端，设计合成了含氰端基的聚芳醚腈；以含二氮杂萘酮联苯结构二酸单体与4，4'-二氨基二苯醚为原料，经Yamazaki膦酰化缩聚，并用对氰基苯甲酸进行封端，合成了含氰端基的聚芳醚酰胺。

Result s:10 μmol/L retinoids could inhibit the Bel-7402 proliferation and decrease the colony forming of liver cancer cells on soft agar significantly.So some biochemical markers indicating the proliferation status of liver cancer cells changed significant ly, including the significant activity increase of ornithine carbamyl transferase, tyrosine-α-ketoglutaric transaminase and alkaline phosphatase, the significant decrease α-fetoprotein secretion,γ-glutamyltranspetidase and aldolase activity.

结果：10μmol/L维甲酸显著抑制肝癌细胞增殖，并使肝癌细胞软琼脂集落形成率明显减少，使代表肝细胞分化的酶鸟氨酸氨基甲酰转移酶、酪氨酸-α-酮戊二酸转氨酶和碱性磷酸酶比活力明显升高，甲胎蛋白分泌量、γ-谷氨酰转肽酶和醛缩酶比活力明显下降。

Likewise, oil is the mixture of glyceride, including triglyceride, diglyceride monoglyceride .

同样地，油为甘油酯的混合物，包括，例如甘油三酸酯、甘油二酸酯和甘油一酸酯。

Their friction and wear behaviors as additives in rapeseed oil were evaluated and compared with octadecanoic acid using a four-ball test machine.

以实验室合成的无臭硫化十八酸和硫化廿二酸作添加剂，在四球摩擦磨损试验机上考察了二者对菜籽油摩擦学性能的影响，并同十八酸进行了比较。

In this paper,two dihydrazides were synthesized with hydrazine and diethy1 ester.

本文利用了戊二酸二乙酯在一定反应条件下合成戊二酰二肼。

All the parameters meet the requirement for clinical diagnosis.12 samples demonstrated positive including 6 cases of methylmalonic acidemia,1 case of propionic acidemia,3 cases of tyrosinemia Ⅰ,1 case of maple syrup urine disease and 1 cases of ketosis.

用该方法检测的临床患儿尿样中，发现诊断阳性病例12例，包括6例甲基丙二酸血症、1例丙酸血症、3例酪氨酸血症Ⅰ型、1例枫糖尿病和1例Ketosis病。

The syntheses and spectral characteristics of bism-methylbenzene maleate and bis-m-methylbenzene phthalate is reported in this paper.

报道了顺丁烯二酸二间甲苯酯和邻苯二甲酸二间甲苯酯的合成与光谱性质。

RESULTS: Sixteen compounds, ursolic acid (1), indole-3-carboxaldehyde (2), indole-3-carboxylic acid (3), p-coumaric acid (4), azelaic acid (5), N-trans-feruloyl tyramine (6), blumenol A (7), 2-hydroxy-3-methylanthraquinone (8), rubiadin l-methyl ether (9), rubiadin (10), quercetin (11), luteolin (12), chrysoeriol 6-C-β-boivinopyranosyl-7-O-β-glucopyranoside (13), alternanthin (14), stigmasta-5, 22-dien-3β-ol (15), and α-spinasterol (16) were obtained from the EtOAc extract of Alternanthera philoxeroides.

结果：得到并鉴定了16个化合物，分别为乌苏酸(1)、吲哚-3-甲醛(2)、吲哚-3-甲酸(3)、对-香豆酸(4)、壬二酸(5)、N-反式阿魏酰基酪胺(6)、布卢姆醇A(7)、2-羟基-3-甲基蒽醌(8)、甲基异茜草素-1-甲醚(9)、甲基异茜草素(10)、槲皮素(11)、木犀草素(12)、柯伊利素-6-C-β-波伊文糖基-7-O-β-吡喃葡萄糖苷(13)、莲子草素(14)、豆甾醇(15)和α-菠甾醇(16)。

Cycloalkylation of diethyl malonate and ethyl cyanoacetate with alkyl halide was investigated in the presence of toluene.

以甲苯为溶剂及带水剂，用粉末K2CO3代替常规使用的乙醇钠，在季铵盐和聚乙二醇混合相转移催化剂的存在下，含有活泼氢的丙二酸二乙酯和氰乙酸乙酯与二卤代物进行缩合反应，得到相应的环化物。

Sumac wax is comprised of palmitic acid triglyceride (60%-80%), oleic acid glyceride(4-8%) and stearic acid glyceride(5-7%) and a diacid glyceride(2%), it is used for making food and cosmetic products due to its pure smell.

漆树蜡的成分有棕榈酸甘油三酸酯（60%-80%）、油酸甘油酯（4%-8%）、硬脂酸甘油酯（5%-7%）、以及二酸甘油酯（2%）。因为它纯净的气味，所以它也用来制作食品和化妆品。

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。