酸性的羧基 的英文怎麼說
中文拼音 [suānxìngdesuōjī]
酸性的羧基
英文
acidic carboxyl-
Recently, ldl apheresis has been applied in clinic and achieves a satisactory effect. in this dissertation, the tripeptide, serine - aspartic - glutamic acid ( sde ), which existes in the cooh - terminal end of the seven repeats in the ligand binding domain of the ldl receptor and plays an important role in identifying ldl, was synthetized and immobilized onto the polyacrylamide ( paam ) beads as a bionic adsorbent for selective removal of ldl from plasma
本論文以絲氨酰-天冬氨酰-谷氨酸（ sde ）負電性三肽（此三肽廣泛存在於ldl受體配體結合域7個重復序列的羧基末端，對ldl受體特異性識別ldl起著重要作用）作為配體固定到聚丙烯酰胺微球載體上製成仿生性ldl親和吸附劑，考察其對人血漿中ldl及hdl的吸附功效。Hi this thesis, the setting time of various retarders had been tested, in which three retarders with good retarding action, citric acid, sodium tripolyphosphate, bone glue are respectively chosen from three types of retarders, hydroxyl carboxylic acid type, phosphate type and protein type, and the strength and setting time of gypsum added with them are determined. effect of some factors, such as ph value, fineness of hemihydrate, type of gypsum on the retarding action of the retarders is also studied
本文對多種緩凝劑進行凝結時間測試，選擇效果良好的羥基羧酸、無機鹽和蛋白質類型的三種緩凝劑：檸檬酸、多聚磷酸鈉和骨膠，測定它們對石膏凝結時間、強度等宏觀性能的影響，並分別研究ph值、石膏細度和石膏種類等因素對它們的緩凝效果的影響。In order to find replacer for metronidazole and drug selection. some diesters or esters of acids containing nitrogen with metronidazole were designed and synthesized, which have difference in water - solubility. metronidazole was reacted with the corresponding amino or imino multi - carboxylic acid compounds in the presence of acetic anhydride or thionyl chloride or dcc. the intermediate of nitrilotriacetic acid with ac
為尋找羥乙基甲硝唑的替代物，分別採用酸酐法酰氯法或dcc法，將氨基羧酸與羥乙基甲硝唑反應，得到5個親水性不同的單酯或二酯，用ms譜確證了次氨基三乙酸與乙酸酐反應的中間物，並對得到的酯的Abstract : methanesulfonic acid method was used to prepare five acylated chitins. except heptanoyl chitin, four of them, i. e. acetyl chitin, propionyl chitin, butyryl chitin and hexanoyl chitin, had high degree of substitution ( from 1. 5 to 2. 0 ) and exhibited lyotropic liquid crystalline behavior and cholesteric phase. as the length of the side chain increased the critical concentration ( w / w ) somewhat increased from 0. 21 to 0. 26 because the chain rigidity dropped. the critical concentration values of all the four derivatives were much higher than that of chitin ( 0. 12 ) due to the decrease of intramolecular hydrogen bonds. the four acylated chitin can form typical banded texture after being sheared. there minimum concentrations to form banded texture of them were evidently different, varied from 0. 25 ( for acetyl chitin ) to 0. 37 ( for hexanoyl chitin ). these results further indicated that liquid crystallinity decreased while the length of flexible side substituents increased
文摘:四種羧酰化甲殼素即乙酰化、丙酰化、丁酰化和己酰化甲殼素在二氯乙酸溶液中均呈現膽甾型溶致液晶相.臨界濃度隨側基長度增加而略有增加，衍生物的臨界濃度明顯都比原甲殼素高許多，這些規律都可以用鏈剛性的變化來解釋.四種羧酰化甲殼素在剪切時均能形成條帶織構，而且能形成條帶織構的最低濃度有明顯差別，隨側基長度增加而提高，進一步表明側基較長，液晶性減少Abstract : researches on unformaldehyde unironing finishing are summarized in this paper. functions and deficiencies of glyoralamido, water soluble heat reactive polyure thane, bishydroxyethyl - sulfoue, natural high precision chitosan, reactive organosilicon, amyloidosis epoxide, multiple carboxyl acid compound are also analyzed and compared
文摘:綜述了無甲醛免燙整理方面的研究，分析比較了乙二醛-酰胺類整理劑、水溶熱反應性聚氨酯、雙羥乙基碸、天然高聚物殼聚糖、反應性的有機硅、澱粉改性物、環氧類整理劑、多羧酸化合物等無甲醛抗皺整理劑的功能以及各種整理劑存在的不足Zwitterion an ion with both a positive and a negative charge. amino acids and form zwitterions : the amino group has the form - nh3 + and the acid group is ionized as - coo -
兩性離子：既帶有正電荷又帶有負電荷的離子。氨基酸就是這樣一種離子：氨基基團為- nh3 +而羧基端為- coo - 。The association of gene polymorphisms of mgp and alad with lead blood level in children
羧基谷氨酸蛋白和氨基乙酰丙酸脫水酶基因多態性與兒童血鉛的關系Effect of the degree of carboxyl neutralization on the dispersivity of polyacrylate sodium
羧基中和程度對聚丙烯酸鈉分散性能的影響The synthesis technology of various liquid rubbers with different active group terminated, such as hydroxyl - terminated, carboxyl - terminated, isocyanate - terminated, ami - no - terminated, mercaptan - terminated and various main chains like polybutadiene, polyurethane, polystyrene were reviewed with 23 references
摘要綜述了端羥基、端羧基、端異氰酸酯基、端氨基、端巰基等活性端基，以及聚丁二烯、聚氨酯、聚苯乙烯等不同主鏈結構的液體橡膠的合成技術。( 3 ) volume shrinkage of composite decreases greatly with wpu increasing, even can arrive a negative number, but thermal stability is still good. ( 4 ) toughening mechanism is that : the formation of high molecular linear amino formate construct is the toughening reason ; hydroxyl - terminated pu - prepolymer and pf react to produce chemical bond effect which participate cure ; carboxyl - terminated pu - prepolymer and pf form semi - ipn which make toughened pf occur maximum
（ 4 ）通過紅外光譜對pf / pu共混物分子結構進行的定性分析、以及掃描電鏡對沖擊斷面形貌進行的分析，可證明聚氨酯預聚物增韌酚醛樹脂的機理是：兩個體系都是由於高分子量的線形氨基甲酸酯結構而增韌；端羥基pu與pf在共固化中產生化學鍵效應，參與pf的固化；而端羧基pu則與pf形成半互穿網路而增韌。The dispersity and stability of the graphite aqueous suspensions was investigated with centrifugation, the violet visible spectrophotometer, the laser particle size analyzer and scanning electron microscopy ( sem ). the following aspects of the production technique were carefully studied : 1. the effects of surfactants, poly ( vinyl alcohol ) ( pva ), poly ( vinyl pyrrolidone ) ( pvp ), sodium alginate ( sa - na ) and poly ( sodium acrylate ) ( pa - na ) on the suspension stability of graphite were investigated
本研究的主要內容有以下三個方面: 1 、研究了陰離子表面活性劑、非離子表面活性劑、聚乙烯醇（ pva ） 、聚乙烯基吡咯烷酮（ pvp ） 、海藻酸鈉（ sa - na ） 、聚丙烯酸鈉（ pa - na ）對石墨在水中分散性和穩定性的影響; 2 、研究了分散方法、分散介質、 ph值及羧甲基纖維素鈉（ cmc ）含量對石墨在水中分散性和穩定性的影響; 3 、研究了聚乙烯醇（ pva ） 、聚乙烯基吡咯烷酮（ pvp ） 、海藻酸鈉（ sa - na ） 、聚丙烯酸鈉（ pa - na ）四種助分散劑與羧甲基纖維素鈉（ cmc ）復配對石墨在水中分散性和穩定性的影響。Study of the synthesis of pyridine - 2 - carboxylate and its catalytic activity on photo - promoted carbonylation of alkyl bromide
羧酸銅的合成及在光促進溴代烴羰基化反應中催化性能研究As well as in eukaryocyte ( hepg2 and cos - 7 ), then detect their antigenity as a basis study and explore of the choice of immunogen for preventive and therapeutic vaccines of hepatitis b. methods : the gene fragments coding 152aa ( si ) and 124aa ( s2 ) of the carboxyl terminus of hbsag were amplified by pcr from plasmid pecob6 with a pair of primers containing different endonuclease sites and were cloned into multiple cloning sites of plasmid pbks ( + )
為乙型肝炎的預防和治療性疫苗免疫原的選擇進行初步的研究和探討。方法：本研究利用聚合酶鏈反應（ pcr ） ，通過設計帶有不同酶切位點的一對引物，從質粒pecob6特異性擴增hbsag蛋白羧基末端152個氨基酸（ s1 ）和124個氨基酸（ s2 ）的基因片段，分別將二者克隆到質粒pbks （ + ）的多克隆位點，篩選重組克隆。In this study, it has been put forward that taking reactive nanometer magnetic fe304 particles as magnetic nucleus, and the copolymer of styrene ( st ) ? crylic acid ( aa ) as macromolecular shell, we could synthesize, magnetic polymer composite microspheres containing carboxyl groups on their surface, then microspheres are activated by thionylchloride, the surface of such magnetic composite microspheres thus produced had reactive acid chloride groups which then react with the free amino groups of the free soluble enzymes to give peptide bonds ( ? o ? h ?,
本研究首次提出了以納米級磁性fe _ 3o _ 4粒子為核心，苯乙烯（ st ） ?丙烯酸（ aa ）共聚物為高分子殼層，合成了表面帶羧基的磁性高分子復合微球，然後將這種微球用二氯亞碸進行活化處理，在其表面形成了反應性酰氯基團，該基團可以與游離酶的氨基形成肽鍵，從而將游離酶固定化。2 with dispersion - polymerization, taking above reactive nanometer magnetic fe304particles as nucleus, and the copolymer of styrene ( st ) ? crylic acid ( aa ) as macromolecular shell, we could synthesize, magnetic polymer composite microspheres containing carboxyl groups on their surface
2採用分散聚合法，以上述反應型納米磁性fe _ 3o _ 4粒子為核心，苯乙烯（ st ） ?丙烯酸（ aa ）共聚物為高分子殼層，合成了表面帶羧基的磁性高分子復合微球。We found that there are two types of map1lc3 in rat, mouse and human, besides that, there is another type ( map1lc3c ) in human. we expressed all map1lc3 in hek293 cells respectively and found that the post translational modification of all map1lc3 is similar to yeast apg8 and rat map1lc3 identified except human lc3b. characteristic carboxyl cleavage occurred in conserved glycine of them
在hek293細胞中分別表達這三個物種中的所有的a型、 b型以及人map1lc3c分子，發現除了人的map1lc3b外其它同源物的修飾方式與已知的酵母apg8和大鼠的lc3修飾方式相類似，均發生了羧基端的切割反應而且羧基端保守的甘氨酸是它們發生翻譯后修飾的活性位點。Team a is made of carboxyl styrene, crylic acid assemble matter ; team b is made of silicate cement, quality quarts grit and special active chemical matter
組分是由羧基苯乙烯、丙烯酸共聚物等組成； b組份是由硅酸鹽水泥、精選的石英砂及特種活性化學物質等組成。Moreover, it did n ' t occur the carboxyl cleavage and lysine residual that substitute for the conserved glycine residual is the novel essential site
進一步分析表明人map1lc3b並沒有發生羧基端的切割反應而且羧基端的賴氨酸代替了保守的甘氨酸成為人map1lc3b發生修飾的活性位點。The influence of retarder on the seaing time and ultimate strength of gypsum plaster was investigated in this paper. the experimental results indicate that the effect of single retarder, such as citric acid, is inferior to that of composite retarder which was made of blending citric acid with a few portland cement ( about 0. 5 ?, by weight ). the effect of different water - retention agents, such as polyvinyl alcohol ( pva ), carboxymethyl cellulose ( cmc ), and na - bentonite, etc., was also studied, and the results demonstrate that by means of adding organic and inorganic water - retention agent simultaneously the water - retention of plastering slurry can obviously be improved. the optimal mix proportion of gypsum plaster suitable to finish coat of walls and ceilings of buildings has been got by use of factorial experiment with orthogonal array accounting for interactions between factors each other
研究了分別以檸檬酸、檸檬酸與普通硅酸鹽水泥復合物作緩凝劑，調節粉刷石膏的凝結時間，並對比2種緩凝體系對石膏抗折、抗壓強度的影響.比較不同保水劑（聚乙烯醇、羧甲基纖維素）以及相同量的保水劑在不同工藝流程下保水效果上的區別.探索了有機保水劑和無機保水劑對粉刷石膏的保水性的影響.結果表明，檸檬酸與普通硅酸鹽水泥的復合緩凝劑比單純的檸檬酸更能有效地延緩建築石膏的凝結，同時建築石膏的抗折、抗壓強度降低幅度減小In the procedure, carbon nanotubes were oxidized by nitric acid and then neutralized with naoh to create carboxyl surface groups which were used to adsorb ni ( superscript 2 + ) ions, thereafter the adsorbed ni ( superscript 2 + ) ions were chemically reduced into ni nano - particles as a catalytic center for electroless nickel deposition, all these were further confirmed by infrared absorption spectra and electron microscopic observations
碳納米管經硝酸氧化和堿中和后表面生成羧基，利用羧基吸附鎳離子，之後吸附的鎳離子被化學還原為鎳的納米微粒並成為化學鍍鎳的催化活性中心。分享友人