查询词典 acid-base

From the structural analysis of three praseodymium complexes, we could draw a conclusion that as the dentate arms of carboxyl group on ligands elongating, the coordination numbers of Pr and the coordination modes of ligands increase, and the mean distances between metallic atoms of metallic helices existing in these complexes augment.2. By altering 5-substituting group of isophthalic acid three series of lanthanide complexes 8～19 with 5-methylisophthalic acid and 5-nitroisophthalic acid have been prepared.

从得到的三个配体的镨配合物的结构分析可以看出，随配体的羧基齿臂的增长，Pr的配位数逐渐增大，配体的配位模式增多，配合物中存在的螺旋金属链中的金属间平均距离增大。2、通过改变间苯二甲酸配体的5位取代基，制备了5-甲基间苯二甲酸和5-硝基间苯二甲酸的三个系列稀土羧酸配合物8～19。

The wholly aromatic four-component copolyesters were prepared from p-acetoxy-benzoic acid, hydroquinone diacetate, 2,6-naphthalene dicarboxylic acid and isophthalic acid by melting polycondensation.

由对乙酰氧基苯甲酸、对苯二酚二乙酯、2，6-萘二甲酸及间苯二甲酸四种单体通过熔融缩聚反应，合成了全芳香族四组分共聚酯。

And 2-10% acrylic acid, meth acrylic acid, or itaconic acid, or their mixts.

2-10%的丙烯酸、甲基丙烯酸或衣康酸或它们的混合物。

Lauric acid, stearic acid, oleic, rapic acid affection the quality of lipopeptide is also studied.

对由月桂酸、油酸、硬脂酸、菜籽油脂肪酸为原料合成的脂肽性能做了对比研究。

Ingredients: Water,Lauric Acid,Myristic Acid,Stearic Acid,Propylene Glocol,Potassium Hydroxide,Cocamidopropyl Betaine,Starch Hydroxypropyltrimnium Chloride,Sodium Laureth Sulfate,Glycol Distearate,Lavandula Angustifolia Oil,Creatine,Tetrasodium Edta,Perfume,Dmdm Hydantoin.

成分： 去离子水，月桂酸，肉豆蔻酸，硬脂酸，丙二醇，氢氧化钾，椰油酰胺丙基甜菜碱，淀粉羟丙基三甲基氯化铵，月桂醇聚醚硫酸钠，乙二醇双硬脂酸酯，薰衣草精油，肌酸，乙二胺四乙酸四钠，香精，DMDM 乙内酰脲。

The pot experiment was carried out to study the effect of different organic acids, EDTA, citric acid, oxalic acid and malic acid, on mobilization of Cu in soil and Cu uptake by Leersia hexandra Swartz.

文章采用盆栽试验研究了EDTA、柠檬酸、草酸和酒石酸对土壤中Cu的活化和李氏禾吸收Cu的影响。

The results indicated that the concentration of Cu in the soil is 220.16 mgkg^(-1) contrast to the CK 500.31 mgkg^(-1) significantly decrease when the concentration of EDTA in the soil is 2 mmolkg^(-1) that explains EDTA treatment significantly decreased soluble Cu content in soil because of translating into Cu of water distill floating on the surface of soil and most accumulating around root. Contemporary, application of EDTA to the soil significantly enhanced mobilization of Cu in soil and increased Cu uptake in shoot of Leersia hexandra Swartz., the highest concentration in the leaves 336.54 mgkg^(-1) is 4 times higher compared with the ck 80.34 mgkg^(-1). However, citric acid, oxalic acid and malic acid inhibited mobilization of Cu and less significantly affected shoot Cu accumulation.

结果表明，当向土壤中施加质量摩尔浓度为2mmolkg^(-1)的EDTA时，土壤中Cu质量分数为220.16mgkg^(-1)与空白土壤中500.31mgkg^(-1)相比明显减少，说明EDTA可以极显著的降低土壤中的铜质量分数，使其转化成水提取态的Cu浮于土壤表面，并大部分聚集在根部周围，同时向土壤中施加EDTA不但促进了对Cu的活化而且显著提高了李氏禾对Cu的吸收，叶中最高质量分数达到336.54mgkg^(-1)是对照中80.34mgkg^(-1)的四倍；而柠檬酸、草酸和酒石酸则抑制了Cu的活化，但对李氏禾地上部分的Cu质量分数影响不大。

Image recording medium comprising a substrateand an imaging layer containing binder, developer, dye, stabilizer against oil exposure (e.g. Calcium salt of organic acid); method for preparing a recording medium comprising binder, radiation absorber, phenolic compound, calcium salt of organic acid, and leuco dye, said radiation absorber initiating reaction between phenolic compound, calcium salt of organic acid and leuco dye.

图像记录介质，其包含衬底和成像层，所述成像层包含粘合剂、显色剂、染料、抵抗油暴露的稳定剂；制备包含粘合剂、辐射吸收剂、酚类化合物、有机酸的钙盐和无色染料的记录介质的方法，所述辐射吸收剂引发酚类化合物、有机酸的钙盐和无色染料之间的反应。

The production of diphenolic acid from levulinic acid and phenol catalyzed by hydrochloric acid was studied.

论文研究了以乙酰丙酸和苯酚为原料，以盐酸为催化剂催化合成双酚酸的工艺。

We can supply monomers, such as Rutin,Baicalin,Amygdalin,Ursolic acid,limonin,?Glycyrrhizic acid, Chlorogenic acid, Paeoniflorin, Gardenoside, Paeonol, Apigenin, Naringin, Naringenin, Astragalus P.E., Soybean Isoflavones, Epimedium Extract and so on.

产品主要有单体（含量90%~98%：苦杏仁苷、柠檬苦素、熊果酸、芍药苷、栀子苷、丹皮酚、芦丁、槲皮素、黄芩苷、黄芩素、芹菜素、绿原酸、甘草酸、柚皮苷、柚皮素；标准提取物：山楂总黄酮、葛根总黄酮、黄芪多糖、枸杞多糖、大豆异黄酮等。

Fancy gold-plated dangling earrings with facetted White Opal crystals.

花式镀金悬垂耳环与facetted白欧泊水晶。

This essay chooses the study aim from biology teachers in middle school in Shi Jiazhuang which tells us that most of the middle school biology teachers in Shi Jiazhuang have the"burnout", lower successfulness, individualize.

本文选取石家庄市初中生物教师作为研究对象，运用问卷调查的方法对石家庄市初中生物教师职业倦怠的现状进行调查，调查结果发现，石家庄市初中生物教师这一群体普遍存在职业倦怠，情感枯竭程度偏高，成就感偏低，去个性化程度最为严重。