加成化合物

Through salification, esterification, hydrogenation, condensation, oxidation and halogenation etc.,LA can produce useful chemicals and new polymer materials.

同时它具有良好的反应活性，通过成盐、酯化、加氢、缩合、氧化和卤化等化学反应，可制得各种各样有用的化合物和新型高分子材料，因此乙酰丙酸有望成为一个基于生物质资源的新平台化合物。

Artificial feeding for the pale yellow or gray stools, quality hard, because milk proteins are more obvious after the protein decomposition odor, 1-2 times a day, and sometimes have milk block, if mixed fed infants, combined with starchy foods at the same time, a low frequency of stool, but the amount of deep brown, hardness than the pure milk-fed better, smell is also increased, if the increase purée can be green, especially if stool odor clearly shows that poor protein digestion, if the stool has bubbles indicate poor digestion of carbohydrates, if the appearance of oily that digest fat well, if the stool has milk valve, most of undigested fat and calcium or magnesium into the soap block, the volume of small, meaningless.

人工喂养的为淡黄色大便或呈灰色，质较硬，因牛奶中蛋白质较多，有明显的蛋白质分解后的臭味，每天1-2次，有时有奶块，若混合喂养的婴儿，同时再加淀粉类食物，大便次数不多，但量多深褐色，硬度比单纯牛奶喂养的好一些，臭味也加大，若加菜泥可呈绿色，若大便臭味特别明显，说明蛋白质消化不好，若大便有泡沫说明碳水化合物消化不好，若外观有油状，表示脂肪消化不好，若大便中有奶瓣，大多是未消化的脂肪与钙或镁结合成的皂块，量不多，无意义。

The results show that the degradation effectiveness of PVA was optimum when potassium ferrate and sodium hypochlorite were jointly used as the oxidative agent. The removal rate of PVA and COD was more than 98% and 40% under the conditions that the concentration of PVA was 3.0 g/L and the pH value was 7.2, the dosage of potassium ferrate and sodium hypo chlorite were 0.32 g/L and 3.92 g/L, and the reaction time was 50 min. In the process of united oxidative degradation, the chain of PVA was cut off and many low molecular weight compounds were formed. The main degradation products were carboxyl compounds.

结果表明，用高铁酸钾与次氯酸钠联合氧化PVA时，降解效果最佳；在3.0 g/L，pH值为7.2的PVA溶液中，当高铁酸钾与次氯酸钠的投加量分别为0.32 g/L、3.92 g/L，反应时间为50 min时，PVA的去除率大于98%，COD去除率大于40%；在联合氧化降解过程中，PVA断链成小分子物质，最终降解产物主要为羧基化合物。

Many other reactions catalyzed by phosphines have also been studied.

进而用2，3-联烯酸叔丁酯来研究[3+2]环加成反应合成螺环化合物，区域选择性有很大提高，产率也很好。

Cynanchum Lingtai apricot production in the average weight 65 grams, the brightly-colored fruit, juicy rich, sweet-sour taste, sweet from the nucleolus, when the late Qing Dynasty famous Shaanxi, Gansu provinces, the Qing imperial court Tongzhi tribute for years.

灵台生产的牛心杏平均单果重65克，果实色泽鲜艳，汁多味浓，甜酸适口，离核仁甜，清末时就驰名陕、甘两省，清同治年间曾为朝廷贡品。

Chenopodium album,Solanum nigrum, and Amaranthus retroflexus were very susceptible to the herbicides. Polygonum persicaria and Abutilon theophrasti were relatively less susceptible to the herbicides, and Lycopersicon esculentum was not susceptible to it. The relationship between reduction rates of weed biomass and PPM values of weed leaves 2,4, and 6 days after treatment was established.

供试的6种杂草对该混剂的敏感性存在显著差异：红心藜Chenopodium album、龙葵Solanum nigrum和反枝苋Amaranthus retroflexus对该混剂最敏感，ED90值分别为47.65、71.67和29.17g/hm2；春蓼Polygonum persicaria和苘麻Abutilon theophrasti敏感，ED90值分别为96.91、114.20g/hm2；而番茄不敏感。