tta 中文意思是什麼

tta 解釋
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  1. 6. we examined the mode and tempo of evolution of cyt b in oedipodidae. for these grasshoppers, the most common amino acids and codons are leucine ( tta ), isoleucine ( att ) and phenylalanine ( ttt )

    運用cytb基囚的核』苦酸序列對斑翅蝗科昆蟲進行系統研穴時，各屬種問的分類關系都比較明確，得到的樹的拓撲結構大都一致。
  2. Tta for construction of bored pile and substructure of bridge c7

    橋鉆孔樁及下層結構的臨時交通管理措施
  3. Back extraction by hno3 - hf and back extraction by concentrated hnch after lower the concentration of organic phase are studied, the method of back extration by hnorhf can not be used to icp - ms, because some zirconium is hydrolysis when hf is removed by heat. however, the method of back extraction by concentrated nitric acid after lower the concentration of organic phase can be used to icp - ms, the recovery is 93. 2 %, rsd % is 5. 24 %, the decontamination factor of uranium is 3. 2xl04, the detection limit of zirconium is 0. 04ng / ml. the method of tta extracting trace zirconium in uranium is firstly used to icp - ms, the result is satisfied, it can be used to determine zirconium in uranic production quickly and veraciously

    本文通過研究hno _ 3 - hf反萃和稀釋有機相後用濃hno _ 3反萃這兩種分離方法，認為hno _ 3 - hf反萃由於在加熱去除hf時酸度不易控制，導致鋯的部分水解，因而此方法不宜用於icp - ms中，然而稀釋有機相後用濃hno _ 3反萃法用於icp - ms測量中，全程回收率為93 . 2 ，相對標準偏差為5 . 24 ，鈾的一次去污因子為3 . 2 10 ~ 4 ，鋯的測定下限為0 . 04ng / ml ，本文首次將tta萃取分離鈾中鋯用於icp - ms測量中，結果令人滿意，此方法適用於快速、準確測量鈾產品中微量鋯。
  4. It can determine the elements in water. when tta is used to extract zirconium in uranium, the combination of zirconium and tta is very strong, the concentrated acid of nitric acid and hydrochloric acid can not destroy their combination

    用tta萃取分離鈾、鋯時， tta對鋯的螯合作用很強，硝酸和鹽酸的濃酸溶液並不能破壞它們之間的整合，即對鋯的反萃取非常困難。
  5. We have prepared a series of neodymium binary / ternary complexes, such as nd ( acac ) 3 ' 2h2o, nd ( tfa ) 3 ' 2h2o, nd ( hfa ) 3 ' 2h2o, nd ( dbm ) 3 ' h2o, nd ( acac ) 3phen, nd ( tfa ) 3phen, nd ( hfa ) 3phen, nd ( dbm ) 3phen, nd ( tta ) 3 ( tppo ) 2, nd ( hfa ) 3 ( tppo ) 2, nd ( acac ) 4hpy, nd ( tta ) 4hpy and ndq3. the effects of organic ligands, synergistic coordination agents and different substitution groups for - diketones on effective line width and photoluminescence intensity of neodymium complexes were investigated. the photoluminescence spectra indicate that synergistic coordination agents can shield neodymium ion and impede water molecules penetrating into inner coordination shell to satisfy large coordination number of nd3 + during hydrous synthesis process, so the luminescence intensity of neodymium ternary complexes is stronger than that of neodymium binary complexes

    發光光譜研究表明，由於協同試劑的參與，屏蔽了水分子參與配位，降低了羥基（ oh ）對釹離子激發態能級~ 4f _ （ 3 2 ）的猝滅，三元配合物的熒光強度均比二元配合物強，其中配合物nd （ tta ） _ 3 （ tppo ） _ 2在1340nm處的熒光強度最強，適合作為摻雜的光學活性物質，來制備有源光波導材料；在有水工藝條件下，單純地氟化配體未必能提高釹配合物的近紅外發光性能。
  6. Because the concentration of zirconium in uranium has large ranges, from 1. 50xlo ' 6 - 3. 8g / gu, not only how to decrease the remainder of uranium to eliminate its determinate effect but also how to acquire higher recovery of zirconium is considered, so the method of silica gel, the method of tbp levextrel resin chromatography, the method of tta chromatography and the method of tta extraction are compared. then tta extraction is chosen to acquire the ideal separation purpose. compared with icp - ms and icp - aes, xrf has characters of high repeatability, stability, low cost, high concentration elements analysis, the ability to determinate solid sample and having comprehensive practicability, but xrf has lower sensitivity, so how to increase the concentration of the sample to acquire better precision is a difficult problem, the optimum of operating condition : the integral time of spectral lines is 60s, the integral time of background lines is 20s, the voltage of xrf is 50kv, the electric current is 50ma

    由於鈾中鋯的含量范圍很廣，從1 . 50 10 ~ （ - 6 ） 3 . 8g / gu ，在分離和測量時，既要考慮盡量地減少鈾的殘留量以消除鈾對鋯測量產生的影響，又要獲得鋯的理想的回收率，因此本文在分離方法的選擇上比較了硅膠吸附分離法， cl - tbp萃取色層法， tta萃取色層法和tta萃取分離法的優缺點，認為tta萃取分離法可以達到理想的分離效果。
  7. Tta for diversion of yuen long highway ch. 32. 55 - 32. 45 yuen long bound for reconstruction

    近福亨村重造元朗公路往元朗方向里程距離
  8. Tta for diversion of yuen long highway yuen long bound near to yuen

    公路往元朗方向近桃園圍的
  9. Tta for reconstruction of yuen long highway tuen mun bound

    重造元朗公路往
  10. Tta for reconstruction of yuen long highway yuen long bound near fu

    重造元朗公路往
  11. Tta for reconstruction of yuen long highway yuen long - bound between to yuen

    重造元朗公路往元朗方向介
  12. The method of tta extracting trace zirconium in uranium is firstly used to icp - aes, the recovery is 93. 2 %, the detection limit of zirconium is 0. 001 | ig / ml. the method can be used to determine low concentration of zirconium

    並且將tta取法用於icpaes中，全程回收率為93工，結的檢出限為0刀olndrnl ，此方法可用於含量較低的結的分析和測量。
  13. The recovery can reach 95 % after it extracts once, rsd % is lower than 10 %, the detection limit of zirconium is 1. 3u. g / ml. and increasing the application of film in xrf is studied. the method of using organic sample to make resource after extracted by tta can be used to determine zirconium in simulated p rocess solution of spent fuel reprocessing quickly and veraciouly

    萃取一次便可達到理想的萃取效果，回收率可達95 ，相對標準偏差10 ，鋯的檢出限為1 . 30 g / ml ，同時改進了薄膜法在x射線熒光光譜法中的應用范圍，此方法採用tta萃取分離的有機相直接制源可快速、準確地對測定purex模擬工藝料液中的鋯含量。
  14. Tta for construction of rws10 and rws

    的臨時交通管理措施
  15. Tta for construction of piling works at c9

    之村路建造橋
  16. Main works and their important results are showed as following. firstly, the cdna encoding bullfrog gh is amplified by use of the total rna, extracted from adult bullfrog ' s pituitary, as the template, pi ( 5 ' - cggatcc atg gct tca ggg tta ggc ) and p2 ( 5 ' - cgaattc tta aaa ggt gca gtt gct ) as the primer pair and one particular cdna product, 660bp, was obtained after the rt - pcr - the product was purified by using dna agarose gel extraction method. after the purified cdna and pmd18 - t vector were ligated at 16 over night, the ligation products were transformed into e. coli strain dh5a and then the transformants were screened by clone pcr method

    首先，以成體牛蛙的腦垂體總rna為模板，進行rt ? pcr擴增得到約660bp的特異性pcr產物帶，切下瓊脂糖凝膠中的特異產物帶進行cdna膠回收，將cdna與pmd18 ? t載體進行t ? a克隆連接並轉化到dh5 e . coli后，進行菌落pcr 、質粒酶切鑒定，篩選出陽性菌株，測序結果經blast分析，與已報道的牛蛙生長激素基因高度同源，證實此陽性克隆為牛蛙生長激素基因轉化子，命名為pbfgh 。
  17. The optimum method of tta extraction : the extracting agent cocentration is 0. 5mol / l, the diluent is xylene, the extracting media is nitric acid, its concentration is 4mol / l, the extracting time is lomin

    Tta萃取分離的最佳分離方案：萃取劑濃度為0 . 5mol / l ，稀釋劑採用二甲苯，採用4mol / l的硝酸做為萃取介質，每次萃取時間為10min 。
  18. Tta for reduction of speed limit on yuen long highway

    元朗公路減低車速限制的
  19. Summary of major tta schemes implemented to be implemented

    主要臨時交通安排一覽表
  20. Tta for construction of nb11, rws24 and c9 - 4wb

    的臨時交通管理措施
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