aldehydes and ketones 中文意思是什麼
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The reaction of sulfate with aldehydes and ketones has been known for many years.
大家知道硫酸鹽能與醛類和酮類反應已有許多年了。 -
It is produced by the reduction of fuchsin by sulfurous acid, and is oxidized by aldehydes and ketones, restoring the magenta color of the fuchsin
配法是用亞硫酸使品紅溶液還原，若有醛酮類存在時便使之氧化而重新呈現品紅本身的洋紅色。 -
Synthesis of pentaerythritol diacetals from aldehydes and ketones under microwave irradiation
催化下微波促進芳香醛與環酮的縮合反應 -
By using sterically hindered, electron - rich alkylphosphines and n - heterocyclic carbenes ( nhc ), this process has encompassed a broad range of substrates including ketones, aldehydes, esters, amides, malonates, nitrocompounds, nitriles and sulfones
隨著大位阻、富電子烷基膦和氮雜環卡賓（ nhc ）為配體的催化體系的出現，該類反應的底物已從酮擴展到醛、酯、酰胺以及含酸性氫的化合物如丙二酸酯、硝基化合物、腈、碸等。 -
The traditional catalyst used in acetal ( ketal ) synthetic reaction is strong inorganic acid. but there is some limits to its use because of its side reaction, strong erosion and liability to pollute the environment. molybdophosphoric acid is used as catalyst and three condensation products are prepared through the direct reaction of aldehydes ( ketones ) and ethylene. in addition, several elements of affecting the reaction is researched. it is proved that molybdophosphoric acid is very active as catalyst in less addition, the product yield is quite high and the quality of reuse is quite good
縮醛（酮）合成反應的傳統催化劑為無機強酸，但由於副反應多、腐蝕性強和易污染環境等缺點，其使用受到限制.用磷鉬酸為催化劑，通過醛（酮）與乙二醇直接反應得到了三種縮合產物.對影響反應的諸因素進行研究，結果表明，用磷鉬酸作催化劑，用量小，活性高，產品收率較高，且重復使用性能較好 -
Abstract : the traditional catalyst used in acetal ( ketal ) synthetic reaction is strong inorganic acid. but there is some limits to its use because of its side reaction, strong erosion and liability to pollute the environment. molybdophosphoric acid is used as catalyst and three condensation products are prepared through the direct reaction of aldehydes ( ketones ) and ethylene. in addition, several elements of affecting the reaction is researched. it is proved that molybdophosphoric acid is very active as catalyst in less addition, the product yield is quite high and the quality of reuse is quite good
文摘:縮醛（酮）合成反應的傳統催化劑為無機強酸，但由於副反應多、腐蝕性強和易污染環境等缺點，其使用受到限制.用磷鉬酸為催化劑，通過醛（酮）與乙二醇直接反應得到了三種縮合產物.對影響反應的諸因素進行研究，結果表明，用磷鉬酸作催化劑，用量小，活性高，產品收率較高，且重復使用性能較好 -
The pentaerythritol diacetals were effectively synthesized through condensation reaction of pentaerythritol with aldehydes and ketones promoted by zirconium sulfate - silica gel under microwave irradiation
摘要微波輻射硫酸鋯矽膠催化季戊四醇與醛、酮縮合反應，高收率制得了雙縮醛和雙縮酮化合物。 -
Essential oils, perfumery isolates and synthetics for export. determination of aldehydes and ketones. hydroxylamine method
出口芳香油單離和合成香料醛和酮的測定.羥胺法 -
Essential oils, perfumery isolates and synthetics for export. determination of aldehydes and ketones. neutral sulfite method
出口芳香油單離和合成香料醛和酮的測定.中性亞硫酸鈉法 -
Synthesis of homoallyl alcohol by the reaction of allylsamarium bromide with a, - unsaturated aldehydes and ketones
不飽和醛酮反應合成高烯丙基醇 -
Dectection of aldehydes and ketones in smoke of biomass combustion by high performance liqiud chromatography mass spectrometry
生物燃料煙氣中醛酮類物質液質聯用法測定 -
Standard test method for purity of aldehydes and ketones
醛類和酮類純度的標準測試方法
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