16. With the trash of carapace aquatic product as the calcium source, calcium propionate is produced by the synthesis of propionic acid and acid.
利用甲壳类水产的废弃物为钙源，与丙酸合成丙酸钙。
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17. An coupling bioprocess for in situ propionic acid recovery coupled with fermentation of vitamin B12 was established based on this technology.
将此工艺用于发酵过程中丙酸的原位吸附分离，建立了维生素b12发酵与丙酸在线分离的耦合过程。
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18. All these drawbacks, however, could be effectively overcome in a semi batch reaction system into which propionic anhydride was continuously fed.
然而，在连续流加丙酸酐的半批式反应系统中，所有这些缺点均可有效地克服。
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19. In addition, some organic acids with the bad breath, such as butyric acid and propionic acid, and indole, methyl indole compounds and cadaverine.
此外，一些有机酸也与口臭有关，如丁酸和丙酸，以及吲哚、甲基吲哚和尸胺等化合物。
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20. Potassium and magnesium increased, sodium and chlorine decreased in abomasal fluid, acetic, propionic, butyric and VFA increased in abomasal fluid.
真胃液中钾与镁升高，钠与氯下降，乙酸减少，丙酸、丁酸及VFA总量升高。
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21. If propionic, butytric, iso-valeric, hexanic acid et al short-chain fatty acids were detected in urine of human, the urine can be regarded as pathologic urine.
22. With the material of propionic acid and isobutyl alcohol, the synthesis of isobutyl propionate by using solid Mo-Ni Catalyst to replace common vitriol is studied.
以丙酸和异丁醇为原料，以改性钼镍粉取代以往常用的硫酸作催化剂，进行了丙酸异丁酯的合成研究。
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23. The esterification reaction of propionic acid with n-pentanol was studied by using novel aluminophosphate and silicoaluminophosphate molecular sieves as catalysts.
用新型磷酸铝分子筛和硅磷酸铝分子筛作催化剂，对丙酸和正戊醇液—固相酯化反应进行了研究。
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24. A method of preparing trimethylolethane from formaldehyde and propionic aldehyde in water was introduced in the presence of the base through cross Cannizzero reaction.
介绍了以甲醛、丙醛为原料，水为反应介质，碱催化进行交叉康尼扎罗反应制备三羟甲基乙烷的方法。
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25. Waterborne polyurethane resin is prepared by alcoholyzing oil with polyol at first, and then reacting with polyether (polyester), dimethylol propionic acid, diisocyanate.
油与多元醇经醇解反应，进而与聚醚或聚酯、 二羟甲基丙酸、 二异氰酸酯反应制得水溶性氨酯油。
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26. In the methanogenic process, accompanied by the accumulation of propionic acid and butyric acid. (3) Strain P4-1 could degrade p-toluene sulfonate in the present of yeast.
27. In the methanogenic process, accompanied by the accumulation of propionic acid and butyric acid. (3) Strain P4-1 could degrade p-toluene sulfonate in the present of yeast.
