旋光強度 的英文怎麼說
中文拼音 [xuánguāngqiángdù]
旋光強度
英文
optical rotatory power-
Effects of physical factors on the growth of strain ag were investigated, and suitable growth condition for strain ag were as follows : light intensity, 25001ux ; temperature, 30 ; inoculum volume, 10 % ( v / v ) ; ph, about 9. 0
在研究物理因子對螺旋藻生長的影響的試驗中發現，光強2500lux 、溫度30 、接種量10 、 ph9 . 0左右時，有利於螺旋藻的生長。In this study, dna strand breaks in jm109 cells caused by - rays and the protective effect of lexa protein of deinococcus radiodurans have been studied by fluorometric assay of dna unwinding., the results indicated that the rate of dna strand breaks increased with the increase of - rays dose. however, when the concentration of lexa protein from 0. 1 g / ml to 10 g / ml, it still showed no protective effect on dna strand breaks, then lexa protein of deinococcus radiodurans was n ' t radioprotector
本研究採用了dna解旋熒光法檢測由射線所致的dna鏈斷裂的損傷程度以及抗輻射菌lexa蛋白的輻射防護作用，在輻照前加入不同濃度的lexa蛋白，檢測dna鏈的斷裂，結果表明dna鏈的斷裂程度隨著射線輻照劑量的增加而增強，抗輻射菌lexa蛋白對射線所致dna鏈斷裂的修復不起作用，進一步說明抗輻射菌lexa蛋白不起輻射防護作用。. from the direct mutant of spirulina platensis ( sp - d ), we got high purity and activity phycobiliprotein which could grow crystals. the algae fluorescent probe prepared by coupling the above polyclonal antibody to phycobilipotein not only keeps the property of stronger anti - fluorescence quenching but also has the lower fluorescent background when it was used for labeling stoma cells of pea tendril
以原核表達的peac1為抗原制備了免疫活性較好的抗豌豆肌動蛋白的多克隆抗體，從螺旋藻中純化了高純度、高活性、能結晶的藻膽蛋白，將兩者偶聯制備的藻熒光探針，不僅保持了藻膽蛋白很強的抗熒光淬滅能力，而且用於豌豆卷須氣孔細胞熒光標記時有更低的熒光背景。It indicated that not only can spirulina cells grow photoautotrophically and photomixtrotrophically, but also can grow heterotrophically under some specific conditions. light intensity, light quality, temperature, species and concentration of metals, rare earth elements and vitamins, salinity, cell concentration, dissolved oxygen level and magnetic filed etc., all play important roles in photosynthetic performance and cell productivity of spirutina
認為螺旋藻細胞不但能進行光合自養和混合營養生長，而且在某些特定的環境條件下，還能進行異養生長；光照強度、光質、溫度、金屬元素、稀土元素、鹽度、藻體細胞濃度、溶氧水平、維生素、激素和磁場等環境因素對螺旋藻細胞的光合性能和細胞產率都有顯著影響。Comparative study was carried out on the effects of critical environmental factors ( temperature, irradiance ) on the photosynthetic and respiratory rate between spirulina platensis ( s1 ) derived from the alkaline lake in maousu sandy land in inner mongolia and two imported species spirulina platensis ( s2 ) and spirulina maxima ( s3 )
本文從環境因子（溫度，光強）對螺旋藻光合速率和呼吸速率的影響方面，對內蒙古毛烏素沙地堿湖鈍頂螺旋藻（ s _ 1 ）與國外引進的鈍頂螺旋藻（ s _ 2 ）和極大螺旋藻（ s _ 3 ）進行了比較研究。Because of the low temperature there, water vapour condenses into small, clear crystals. a layer of glossy cirrus forms which drifts out from the centre of the tropical cyclone because of divergence at that level. so, when the outer edge of a tropical cyclone reaches hong kong, we can see cirrus high in the sky
熱帶氣旋強烈的上升氣流會把潮濕的空氣帶到近五六千公尺以上的高空，由於溫度很低，水氣結成了透明的小冰粒，形成像絹絲一樣發光的雲彩-捲雲，這些在高層輻散流場區域的捲雲，會從熱帶氣旋中心向外流出，所以當香港還是位於熱帶氣旋邊緣時，我們便已看到那些在熱帶氣旋外圍的捲雲，並稱為臺母。When the analyzer was located in four angles, a photoelectric detector was used to gather the energy of laser, so we can calculate the retardation of wave plate with the phase shifting
測量裝置採用了步進電機帶動檢偏器旋轉，運用光柵編碼器測角裝置測量檢偏器的轉動角度，使用光電探測器採集檢偏器在四個方位角度的光強值，根據移相演算法得出波片的相位延遲角。A novel strip - coil - baffle structure used to enhance heat transfer and support the tube bundle for a tube - shell heat exchanger is proposed. the new structure can sleeve the tubes in bundle alternatively to create a vortex flow in a heat exchanger. the numerical simulation on the flow and heat transfer characteristics for this new structure heat exchanger is conducted. the computational domain consists of two strip - coil sleeved tubes and two bare tubes oppositely placed at each corner of a square. the velocity and temperature fields in such strip - coil - baffled channel are simulated using fluent software. the effects of the strip - coil - baffles on heat transfer enhancement and flow resistance in relation to the reynolds number are analyzed. the results show that this new structure bundle can enhance the heat transfer coefficient up to a range of 40 ? to 55 ? in comparison with a bare tube bundle ; meanwhile, higher flow resistance is also accompanied. it is believe that the strip - coil - baffled heat exchanger should have promising applications in many industry fields
介紹了一種用於強化管殼式換熱器殼側傳熱和支撐管束的螺旋折流片新型結構，該結構是對換熱器管子相間地套上螺旋折流片以產生旋渦流動.研究模型是在正方形布置的4個管子中的2個對角管子套上螺旋折流片后形成的通道，利用fluent軟體對該上述四管通道模型的流場和溫度分佈情況進行了數值模擬;分析了四管通道模型中螺旋折流片對強化傳熱和流動阻力隨雷諾數的變化關系的影響.算例結果顯示該新型結構可比相同尺寸的光管通道中的情形傳熱系數提高約40 ? 55 ? ，同時也將伴隨較高的流動阻力.可以相信螺旋折流片式換熱器將會在許多工業領域有良好的應用前景Abstract : a novel strip - coil - baffle structure used to enhance heat transfer and support the tube bundle for a tube - shell heat exchanger is proposed. the new structure can sleeve the tubes in bundle alternatively to create a vortex flow in a heat exchanger. the numerical simulation on the flow and heat transfer characteristics for this new structure heat exchanger is conducted. the computational domain consists of two strip - coil sleeved tubes and two bare tubes oppositely placed at each corner of a square. the velocity and temperature fields in such strip - coil - baffled channel are simulated using fluent software. the effects of the strip - coil - baffles on heat transfer enhancement and flow resistance in relation to the reynolds number are analyzed. the results show that this new structure bundle can enhance the heat transfer coefficient up to a range of 40 ? to 55 ? in comparison with a bare tube bundle ; meanwhile, higher flow resistance is also accompanied. it is believe that the strip - coil - baffled heat exchanger should have promising applications in many industry fields
文摘:介紹了一種用於強化管殼式換熱器殼側傳熱和支撐管束的螺旋折流片新型結構，該結構是對換熱器管子相間地套上螺旋折流片以產生旋渦流動.研究模型是在正方形布置的4個管子中的2個對角管子套上螺旋折流片后形成的通道，利用fluent軟體對該上述四管通道模型的流場和溫度分佈情況進行了數值模擬;分析了四管通道模型中螺旋折流片對強化傳熱和流動阻力隨雷諾數的變化關系的影響.算例結果顯示該新型結構可比相同尺寸的光管通道中的情形傳熱系數提高約40 ? 55 ? ，同時也將伴隨較高的流動阻力.可以相信螺旋折流片式換熱器將會在許多工業領域有良好的應用前景The result showed that the spin coating method was better relatively. the obvious blue shift of pl was found in spectra of the ps / pmma composite prepared with spin coating. compared to the spectra from original ps sample, the luminescence quenching was greatly decreased for ps / pmma composite due to the prevention to ps layer with coated with pmma film and modification of dielectrical penetrability of the medium in quantum threads by the pmma
實驗結果表明，用旋塗法實現的pmma固化后再與多孔硅復合而制得的樣品的結果最好，它與原始的多孔硅樣品相比發光峰發生了藍移而且發光強度下降很小，我們認為pmma層有限的厚度和pmma對多孔硅表面的保護使復合后發光強度下降很小，而且制備的多孔硅pmma復合體系的發光強度幾乎不隨時間而下降。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。9. okume : origin of africa. wooden features : gloss strong, straight texture ; fine structure, uniform ; light weight ; soft hardness ; low intensity ; easily processed, containing silica, easy blunt tool ; peeling excellent performance ; surface bristle slightly ; good adhesive properties, nail easily
木材特性：光澤強，紋理直結構細，均勻重量輕硬度軟強度低干縮中。加工容易，含硅石，刀具易鈍單板刨切旋切性能佳表面略起毛膠粘性能良好，釘釘容易。2. okume : origin of africa. wooden features : gloss strong, straight texture ; fine structure, uniform ; light weight ; soft hardness ; low intensity ; easily processed, containing silica, easy blunt tool ; peeling excellent performance ; surface bristle slightly ; good adhesive properties, nail easily
木材特性：光澤強。紋理直結構細，均勻重量輕硬度軟強度低干縮中。加工容易，含硅石，刀具易鈍單板刨切旋切性能佳表面略起毛膠粘性能良好，釘釘容易。10. mahogany, origin of central america and africa. wooden features : gloss strong, straight texture, structure small, uniform ; light weight, hardness soft, low intensity ; easily processed, easy blunt tool ; sliced peeling veneer excellent performance ; surface bristle slightly ; good adhesive properties ; nail easily
木材特性：光澤強，紋理直，結構細，均勻重量輕，硬度軟，強度低干縮中。加工容易，刀具易鈍單板刨切旋切性能佳表面略起毛膠粘性能良好釘釘容易。Effects of physical factors on the growth of strain ag were of light intensity, temperature, inoculum volume, initial ph, effects of nutrient factors on the growth of strain ag included organic carbon sources, organic nitrogen sources, growth factors, hormone etc., and the correlation among nutrient factors being considered. the growth condition of single filament on the plate was also studied
主要內容包括物理因子如光強、溫度、接種量和ph值等對螺旋藻生長的影響；化學因子包括有機碳源、有機氮源、生長因子、生長激素等對螺旋藻生長的影響及這些營養因子之間的綜合作用，並解決了單藻落平板生長問題。The results show : ( 1 ) the light compensation point and light saturation point of s1 s2 and s3 were in range of 12 ~ 27 mol / m2 s and 180 ~ 360 mol / m2 s, respectively, and they changed with the irradiance. ( 2 ) both light compensation point and light saturation point of s1 were higher than those of s2 and 83, and s1 showed greater capability against high irradiance than s2 and s3. ( 3 ) the optimal temperature of the three strains were 25, 35 and 30, respectively, and they had temporal effect. ( 4 ) respiratory rate rose as the temperature rising, and at about 40, it reached the peak
結果表明： （ 1 ） s _ 1 、 s _ 2 、 s _ 3的光補償點和光飽和點的變化范圍分別為12 27 mol m ~ 2 ? s和144 360 mol m ~ 2 ? s ，二者可隨光照環境的變化而變化，其中s _ 1的光補償點和光飽和點均高於s _ 2和s _ 3 ，且表現出強于其餘兩個藻種的抵禦強光輻射的能力； （ 2 ）三個藻種的最適溫度分別為25 ， 35 ，和30 ，具有時間效應； （ 3 ）呼吸速率隨溫度的升高而升高，最大值出現在40附近；溫度低於25 ， s _ 1的光合速率最高，呼吸速率最低，表現出很強的低溫適應性； （ 4 ）螺旋藻的光合特性可隨光照環境的變化而變化，光強增強，可使螺旋藻的最適光照范圍增大，抵禦強輻射的能力增強； （ 5 ）螺旋藻受到溫度脅迫時，其最適光照范圍變窄，對光強的敏感性增加。The exo - atmospheric combat enviroment is introduced, including the outer - space ’ s optical signature, the optical and dynamic signature of the potential targets. the research focus is the precessing rv and tumbling decoy ’ s irradiance intensity ’ s periodical changing rule. a double periodical function model is presented to simulate their irradiance functions
根據空間彈道目標的光學與運動學特性，重點研究了進動旋轉的彈頭和翻滾運動的誘餌的光學強度序列信號的周期性變化規律，並採用雙周期性函數來表示該光學強度信號，以反映彈頭和誘餌在運動特性和表面輻射特徵方面的差異。The sample holder ' s z - axis adjustment makes it easy to find the maximum signal strength, and a safety cover rotates when needed to block the laser
試樣夾在z軸方向上的調整使其能夠方便地發現最大信號強度，此外，當需要阻斷激光的時候安全保護罩將會旋轉。分享友人