酮水合物 的英文怎麼說
中文拼音 [tóngshuǐgěwù]
酮水合物
英文
ketone hydrate-
It is white crystal powder, odorless and slightly bitter ; hardly soluble in ethanol, chloroform, aether and benzene and soluble in solutions whose ph value is less or more than 7
本品在水中易溶，在乙醇、丙酮、氯仿或乙醚中幾乎不溶。本品為兩性化合物，能溶於酸性溶液或堿性溶液。Abstract : the total quantity of perylene quinonoids in hypocrella bambusae ( b. et br. ) sacc., shiraia bambusicola p. henn and culture substance of ascomycetes hypocreacae ( fr ) tul. sp. were determined with spectrophotometric methods. the relative extraction efficiency were studied when ethanol, acetone and chloroform were used as solvents. among them acetone was the best one
文摘:用分光光度法測定了竹紅菌、竹黃和菌寄生菌培養物中?醌類化合物的總量；同時研究了以無水乙醇、丙酮和氯仿為溶劑提取?醌類化合物的相對效率，結果發現以丙酮為溶劑最合適。Abstract : 1 - ( 4 - pyridinyl ) - 2 - propanone, which is the key intermediate of synthesizing the milrinone, a cardiotonic agent, was synthesized from 4 - methyl - pyridine by acetylation in dichloromethane and phase transition catalyzing hydrolysis. the overall yield was 73. 1 %
文摘:報道了以4 -甲基吡啶為原料，經酰化和相轉移催化水解反應制備強心藥物米利酮關鍵中間體1 - （ 4 -吡啶基） - 2 -丙酮的新合成方法，總收率達73 . 1 %Phytoalexins are low molecular weight chemicals that plants produce and accumulate in response to infection especially of fungal origin. sakuranetin is a kind of flavanone phytoalexin isolated from ultraviolet - irradiated rice leaves. recent research work on flavanone phytoalexins represented by sakuranetin is reviewed. interesting novel structures, stucture - activity relationships and synthetic methods are discussed
植物抗毒素是植物受到外界病原微生物侵擾后所產生並積累的一類具有抗菌活性的小分子物質，櫻花素是從水稻稻瘟病感染組織中分離鑒定的一種黃烷酮類植物抗毒素.對以櫻花素為代表的水稻抗毒素及其類似物的結構與活性、黃烷酮類植物抗毒素合成方法的研究概況進行了綜述Two kinds of flavonoids in water extracts, water - extraction and alcohol precipitation, alcohol extracts were found by paper chromatography. they were separated and purified by thin - layer chromatography, one of which was primarily identified by uv as 4 ", 5 - dihydroxy - flavonol etherification or 4 ", 5, 8 - trihydroxy - flavonol etherification
水提物、水提醇沉物、醇提物等3種提取物紙層析結果顯示有兩種黃酮類化合物，經薄層層析分離純化，並進行紫外光譜分析，初步測定其中一組分為4 ， 5 -二羥基黃酮醇醚或4 ， 5 ， 8 -三羥基黃酮醇醚。In order to study the influence factors of aoa of rose flowers, the effects of drying and extraction methods on the aoa of rose flowers were investigated. the results indicated that drying after high - temperature short - time pretreatment was rather effective to maintain their aoa ; the aoa of water extracts was stronger when the temperature was raised from 25 to 100 ; by using orthogonal test, the optimum extraction conditions of rose flowers were : solvent - 75 % ethanol ; ratio of material and solven - 1 : 10 ; extraction times - three times with 24 h at one time, at the room temperature. the extracts obtained by 75 % ethanol were fractionatedly extracted with petroleum, diethyl ether, ethyl acetate and n - butanol in turn, and the various fractions " aoa were analyzed
為了探討玫瑰花抗氧化活性的影響因子，比較了不同乾燥方法、提取方法對其抗氧化活性的影響，發現：經短時高溫處理后再進行乾燥有利於較好地保持玫瑰花的抗氧化活性；以水作溶劑提取時， 25 100范圍內水提液的抗氧化活性隨著溫度的升高而增強；通過正交實驗篩選得到常溫下玫瑰花抗氧化活性物質的最佳提取方法為： 75乙醇為溶劑，液料比1 ： 10 ，提取3次，每次24h ； 75乙醇提取物依次用石油醚、乙醚、乙酸乙酯、正丁醇等有機溶劑進行兩相分部萃取，發現玫瑰花的抗氧化活性物質主要存在於乙酸乙酯部，說明玫瑰花抗氧化活性主要成分可能是單寧類、黃酮苷類和原花色素類化合物； 4The three substituted cinnamamides were prepared from substituted cinnamyi chloride and 1 - phenylsemicarbzide in anhydrous acetone. the structures were confirmed by ir, 1hnmr ， elemental analysis and physical data
由取代桂皮酰氯與1 -苯基氨基脲在無水丙酮中發生的氨解反應，合成了3個新的酰胺類化合物，經元素分析， ir和1hnmr譜進行表徵確證了其結構The nano - material precursors of metal alkoxides and theirs complexes are prepared by anodic dissolution of metal in non - aqueous media with a small quantity of ion - conductive additive and acetylacetonate under 3 0 - 40
在無水醇體系中加入少量的導電鹽及乙酰丙酮，採用金屬陽極溶解法，控制電解溫度在30 - 40 ，電合成nio及zno的前驅體-金屬醇鹽的配合物。They are polymers derived either from carbohydrates and phenolic acids by condensation reactions, or form flavonoids
它是從碳水化合物或酚酸中濃縮而來，也可由類黃酮衍生。According to the described sequence of chicken interleukin - 1 ( chil - 1 ) and by using the extracted total rna of chicken peripheral blood mononuclear cell ( pmbc ), a pair of primers were designed to reverse transcriptionally amplify and to compare the expressional degrees of chil - 1 mrna by stimulating chicken pmbc for 4, 8, 12, 24 hour with lipopolysaccharide ( lps ) and for 24 hour with lps and actidione respectively. the results showed that stimulating chicken pmbc with lps and actidione to produce chil - 1 was a better way of artifical stimulation
根據國外報道的雞il ? 1序列，設計引物，以提取的雞外周血單核細胞總rna為模板， rt ? pcr擴增並比較了經lps單獨刺激雞外周血單核細胞4h 、 8h 、 12h 、 24h和lps與放線菌酮聯合刺激24h時il - 1 mrna表達水平，發現lps與放線菌酮聯合刺激雞外周血單核細胞是一種較佳的實驗方案。Transition metal coordination compounds easily cause d - d transition or change transfer transition. so they show dramatic colors. in this paper, two organic hydrate thermochromic material and a series of thermochromic transition metal complexes are synthesized, and a schiff was synthesized too
研究了對氨基苯乙酮、鹽酸氨基脲縮水楊醛、三水合對硝基苯胺以及對氨基乙酰苯胺等有機物作配體形成的過渡金屬配合物的合成及其熱色性。Researchers in germany pioneered the method of injecting triamcinolone acetonide into the vitreous cavity of the eyeball ( intravitreal triamcinolone acetonide " ivta " injection ) to treat dme in 2000
德國研究人員於2000年起，率先採用玻璃體內注射去炎松丙酮化合物（ triamcinoloneacetonide ）的方法（ intravitrealtriamcinoloneacetonide " ivta " injection ） ，治療糖尿黃斑水腫。And widely used characatarzing in high - technology and more additional value pvp is a type of chemical refine productson the international initiative pvp is one of the important chemical and medical intermediatesthe technology of pvp manufacturing of the seventh national five - year plan which substituted the imports and filled the internal scientific gap
聚乙烯吡咯烷酮pvp是性能優異用途廣泛的水溶性高分子化合物，屬高科技含量高附加值精細化工產品，是國際倡導重要的化工中間體和醫藥中間體。It ' s unique chemistry combines the low temperature performance characteristics heretofore found only in silicones with the excellent encapsulating properties of epoxies, formulated to withstand severe thermal shock, low moisture absorption and excellent dielectric insulation
獨特的低粘度硅酮化合物，能與大多數金屬及膠料進行良好的粘接並具有獨特的低溫性能，是專業為高溫、低吸水性、高絕緣性設計製造的。分享友人