發作猝發 的英文怎麼說
中文拼音 [fāzuòcùfā]
發作猝發
英文
ictus-
Epa pills weren ' t linked to any difference in fatal heart attacks or sudden cardiac death
Epa片劑與致命性心臟病發作和心臟猝死之間沒有聯系。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。These quenching centers can quench both blue emission related to the surface defects and the orange emission of mn2 + impurities. they are most likely originated from the dangling bonds of the lone pairs on surface s2 " or the zn2 + vacancies
這種表面猝滅中心對自激活藍光和橙光發射都有猝滅作用，它們極有可能來自表面s ~ （ 2 - ）孤對電子的懸空鍵或zn ~ （ 2 + ）空位。The quenching centers aroused by mn2 + introduction merely quench the orange emission of colloidal zns : mn2 + nanocrystals. the quenching process of this kind of quenching centers, which reduce the energy of 4t1 level rather than that of conduction band, is different from that of the quenching centers eliminated by zn2 + introduction. the quenching data is analyzed considering the distribution of mn2 + additives adsorbed at the surface of colloidal nanoparticles
Mn ~ （ 2 + ）表面修飾引起的表面猝滅中心只對橙光發射有猝滅作用，這些猝滅中心和外加zn ~ （ 2 + ）消除的表面猝滅中心猝滅行為不同，它們只減少來自內部mn ~ （ 2 + ）雜質~ 4t _ 1能級上的，而不是zns基質導帶上的能量。Due to its complexity of the problem, the theories and experiment results obtained are discrepant, and some of them are even contrary one another. started from the influence by movement rules of small cavities and solid particles, the mechanisms of combined effect of cavitation and sand abrasion are study in this thesis from the aspect of the turbulent coherent structure near the wall. first, a dynamic equation is established for a single spherical bubble and single spherical sand under the non - turbulent coherent structure near the wall, and then a dynamic equation established under the turbulent coherent structure near the wall
首先從理論上推導出在典型湍流邊界層模式的非擬序結構下空泡與固體顆粒的近壁區運動方程，然後推導出湍流近壁擬序結構作用下的空泡與固體顆粒的近壁區運動方程，再將兩種不同條件下的的運動方程進行比較，指出湍流近壁區的擬序結構對空蝕與磨損的發生具有決定性的意義，即正是由於擬序猝發作用的存在，才使得空泡、沙粒對壁面的空蝕與磨損作用得以發生。For dilute solid - liquid two - phase flow, the mechanism of particle motion driven by fluid is the main subject, especially the particle motion in the near wall region. the bursting phenomenon and coherent structure of turbulence play an important role on the motion of particles in the near wall region
明槽紊流近壁區的顆粒運動與紊動猝發現象及紊流相干結構有著密切的關系，開展近壁區顆粒與紊流相互作用的機理研究對于流體力學和泥沙運動力學都有著重要的理論意義和實際價值。Carotenoids can make chla return from excited state to ground state by direct or un - direct quenching, in order to prevent algae from photooxidation. on the other hand, it was indicated that polysaccharides have functions in resisting uv. spirulina plalensis can accumulate both cellular and extracellular polysaccharides during uv treatment, it showed highest uv resistant ability ; nanochloropsis sp also can accumulate cellular polysaccharides, while extracellular polysaccharides reduced ; the cellular polysaccharides content of phaeocystis globosa scherffel decreased and extracellular polysaccharides content did not increased markedly, showing lowest uv resistant ability
鈍頂螺旋藻和微綠球藻中在較低的uv輻射強度下類胡蘿卜素含量升高，而葉綠素a保持相對穩定，說明類胡蘿卜素可能對藻類起到一定保護作用，可能通過直接的或間接的方式猝滅激發態的葉綠素，來保障光合作用的進行；本實驗發現多糖的累積和分泌與藻體的抗uv能力有相關，鈍頂螺旋藻的細胞內和細胞外多糖分泌旺盛，其抗uv能力最強；微綠球藻體內能積累多糖，而胞外多糖分泌減少；球形棕囊藻的胞內多糖含量減少，胞外多糖含量增加也不明顯，其抗uv能力最弱。分享友人