pb a 中文意思是什麼

pb a 解釋

  • pb : 1 〈拉丁語〉 Pharmacopoeia Britannica 《英國藥典》 （＝British Phamacopoeia）。2 Prayer Book 【宗...
  • a : an 用在以母音音素開始的詞前〉 indefinite art 1 〈普通可數名詞第一次提到時，冠以不定冠詞主要表示類...
  1. The main points of this thesis are summarized as follows : 1. a new nanocomposite was developed by combination of prussian blue ( pb ) nanoparticles and multiwalled carbon nanotubes ( mwnts ) in the matrix of biopolymer chitosan ( chit )

    本文開展的具體研究工作如下: 1 .將普魯士藍（ pb ）納米顆粒和mwnts分散在殼聚糖（ chit ）基底中，形成了一種新的納米復合材料。
  2. The supernatants were dialyzed against 50 mm phosphate buffer ( pb ) ( ph 6. 5 ), and passed through a blue - sepharose 6b column ( 3x30 cm )

    Iptg誘導表達目的蛋白，上清液經sds一page電泳后看到約32kd的目的條帶。
  3. The effects of different current density on the alloying element content were discussed. based on the results, the optimal process condition was confirmed : pb ~ ( 2 + ) 80 - 90 g / l sn ~ ( 2 + ) 7 - 15 g / l ch _ 4so _ 3 ( dissociative ) 130 - 150 g / l composite additive 12 ml / l current density 2 - 6 a / dm ~ 2

    採用hull槽實驗方法確定了甲磺酸體系電沉積pb - sn合金鍍層的電流密度范圍，並探討了不同沉積電流密度下pb 、 sn合金含量的變化規律。
  4. During male gametogenesis, the spermatogonia became primary spermatozoa through mitosis, and then became fourth equivalent cytoplasm, round sperm through meiosis. after maturation, they participated in embryo development with the mature oocyte through fertilization. but in female gametogenesis, the primary oocyte formed a matured egg and 1 ~ 3 polar bodies ( pb )

    雄性動物精子發生過程中精原細胞最後一次有絲分裂形成二倍體精母細胞后，經過兩次減數分裂形成了四個含等量細胞質、圓形的精子細胞，最終發育成四個具有正常生理功能的精子，與成熟卵母細胞受精后參與胚胎發育。
  5. Relaxor ferroelectric single crystals, such as pb ( mg1 / 3nb2 / 3 ) - pbtio3 ( abbreviated as pmnt ) or pb ( zn1 / 3nb2 / 3 ) - pbtio3 ( abbreviated as pznt ), have been reported to exhibit an extremely large piezoelectric constant and excellent electrostrictive properties. such excellent performance makes it fully substitute the traditional piezoelectric ceramics and points to a revolution in ultrasonic transducers, actuators and micro - positioners, making relaxor - based piezocrystals the most promising materials for a broad range of advanced applications. however, it is difficult to grow the high quality single crystals because of the lack of valid thermodynamic data

    新型弛豫鐵電單晶鈮鎂酸鉛（簡稱pmnt ）或鈮鋅酸鉛（簡稱pznt ）是一類新興的功能材料，其在準同型相界附近具有優于傳統壓電陶瓷的較高的壓電常數和電致伸縮系數，可完全代替傳統的壓電陶瓷作為超聲換能器、致動器、微位移器等，使其成為鐵電領域的研究熱點，但如何生長出滿足應用要求的單晶材料卻一直是一個困擾的問題。
  6. It could be found that mmt was partially exfoliated and partially intercalated in the matrix. a proper amount of mmt could improve the mechanical and thermal propertied of the pvc / ( pb a - mmt ) nanocomposites

    發現mmt形成了部分剝離部分插層的結構，並且適量mmt的加入可以提高復合材料的力學性能和熱穩定性。
  7. Pure zn refined from spelter in pb and zn production is a very complex technical process, which needs series work. there is every probability of appearing fault because of the large quantity of facility in production, so that it causes serious effect to the production and security

    鉛鋅生產中將粗鋅精煉成為精鋅是一個需要連續作業的復雜工藝過程，所涉及的生產設備較多，發生故障的可能性增大，以至對生產或安全造成嚴重影響。
  8. Geochronological, geochemical and sr - nd isotopic data are reported for the alkaline igneous rocks ( syenites and zhaibei aluminous a - type granite ) and chebu gabbro in southern jiangxi province. shrimp zircon u - pb dating results indicate that the quannan syenite, zhaibei a - type granite and chebu gabbro formed during the early yanshanian period

    對贛南燕山早期的富堿火成巖（正長巖和寨背鋁質a型花崗巖）和車步輝長巖進行了詳細的年代學、元素和sr - nd地球化學研究。
  9. Based on sndm technique, a method of local capacitance - voltage characteristic characterization of ferroelectric thin films was proposed. the effect of traps at oxide - semiconductor interface on metal - oxide - semiconductor structure capacitance - voltage curve was discussed, and the influence of coercive field to the capacitance - voltage characteristics of ferroelectric thin films was also discussed. the dynamic switching of ferroelectric domain in ca doping ( pb, la ) tio3 thin film was studied by sndm from the view of electricity

    利用sndm ，從純電學的角度觀察了plct薄膜中的電疇動態反轉過程，由電疇橫向擴張的移動速度的降低，發現了晶界在電疇反轉過程中對疇壁移動的阻擋作用;根據sndm和pfm的在垂直方向上的不同信息敏感深度，得到plct薄膜中電疇反轉過程中電疇是楔形疇;用pfm觀察同一電疇在去掉外加反轉電場后電疇的極化弛豫現象，結果表明空間電荷是發生極化弛豫的主要原因。
  10. The related reports said the main pollution sources of serious environmental cd, pb and as pollution in china were mining and smelting of nonferrous metals, these pollutants were discharged into the environment and caused the pollution of water, atmosphere, soil and biological species and caused a series of acute and chronic diseases in the exposed people, but the relationship between malignant tumors and environmental cadmium, lead, arsenic pollution is not well understood up to now

    研究認為有色金屬鎘、鉛、砷對人體有毒害作用；有色金屬礦山的開采和冶煉是環境鎘、鉛、砷污染的主要來源；污染物進入環境后，產生水污染、大氣污染、土壤污染和生物污染，繼而危害暴露人群的身體健康，產生一系列急性和慢性病癥。
  11. The main contents are as followings : ( 1 ) the rules of choosing characteristic lines of fe and ni elements in the cu - pb alloy are investigated ; ( 2 ) the characteristic line of the impurity element and that of the reference element makes up a line pair. the intensity ratio of the line pair measured as an y - axis and the corresponding concentration ratio as x - axis, calibration curves for composition analysis is fitted at the 4 kinds of buffer gases

    Q ）採用內標法，由樣品中雜質元素的分析線和內標元素參考線組成分析線對，對五種不同的鉛黃銅樣品，實驗通過測定了雜質元素分析線隊的強度比，以分析線對的強度比為縱坐標、分析線對所對應元素的含量比為橫坐標，擬合出了一系列在四種緩沖氣體中的定標曲線。
  12. Abstract : a review with 10 references is given on the relationship between trace elements and the health of human body including the physological function of fe, the immunity function of se and the poisonous effect of pb

    文摘:討論了微量元素與人體健康的關系及其在體內的代謝平衡問題，包括:鐵的生理功能、硒的免疫功能、鉛的毒害作用。
  13. Contents of cd, pb, cu and zn in duckweed and alternanthera philoxeroides there were determined. as a result, high loadings of zn and cu in both plants were found ; in the duckweed, high content of pb was also observed

    對香花橋中小河流中生長的水葫蘆和水花生cd 、 pb 、 cu 、 zn的含量進行測定，結果表明這兩種水生植物zn和cu的累積量均很高；而浮萍對pb也有明顯富集。
  14. During the course of rectifying zinc, the fluid of coarse liquid zinc put into pb column from furnace works as a key technical parameter

    在鋅的精餾過程中，液態粗鋅從熔化爐加入到鉛塔這個過程的流量是一個關鍵的技術參數。
  15. The result of research will resolve the problems due to increasing output, save energy, and prolong the service life of refining furnace, so a better base is built for the automatic measuring and control of temperature in pb column. keywords zinc refining ; lead c

    這粕陽呢馱割翻澆室內鐳愜8爾市與燃減冰頒俱勁嗆理，解決了因產量提高而暴露出來慚系列問題，將為瑚敘孰分j淺搞g ， 36 lug 、 liffi ！
  16. The structure can be controlled by controlling the pb contents in a certain temperature. the higher dielectric - temperature coefficient can hence be kept near the applied temperature, improving the dielectric tunability of the materials

    控制鉛含量可以控制一定溫度下的結構狀態，可以有目的的控制使用溫度附近有較高的介電溫度系數，達到改善介電調諧性能的目的。
  17. In order to choose the plants that were hypertolerant to heavy metals and for the case of phytoremediation of soils that were polluted by heavy metals, the research was carried out by the methods of soil - planting and sand - planting in green - house. the study includes selecting the hypertolerant plants from 36 dominant species found in the vicinity of a pb / zn mine tailings pond, observing the ecophysiological response of the hyperaccumulators, improving - impact of hyperaccumulators on biosolds and examining the effect of nutrient elements ( n p k ) on the lead uptake

    為選擇和篩選富集重金屬或對重金屬具有耐性的植物，以達到利用植物修復重金屬污染土壤的目的，本研究通過溫室砂培和土培的方法，對生長于鉛鋅尾礦區的36種植物進行了篩選，研究了富集植物品種對重金屬pb的生理生態效應、對重金屬pb的吸收和耐性以及對污泥的響應，並探討了土壤中的營養元素n 、 p 、 k對植物吸收pb的影響，為植物修復工作提供理論依據。
  18. The synthetical results from pb + pb collisions at cern / sps energies show some evidences of the deconfined phase but can not make a determination

    Sps cern能區的b十b實驗的綜合結果有可能給出了退禁閉相變的些跡象，但還不能給出確定性的判據。
  19. There is a close relation between mesozoic tectonic evolution, fluid evolution, petrogenesis and mineralization in the manzhouli - e ' erguna region in the northeast of the northern orogenic belt, china, and three evolution stages of the mesozoic tectonic - fluid - petrogenetic and metallogenetic system are proposed out : 1 ) acompanied by ree and cu mineralization, the calc - alkaline volcanic rocks and mantle - crust mixed type granite occurred under the regional tension tectonic background caused by the mongolia - okhotsk residual ocean that was closing in scissors form in the early - middle jurassic. 2 ) acompanied by pb, zn and ag mineralization, the calc - alkaline and alkaline volcanic rocks occurred under the regional shear - compression tectonic background in the late jurassic. 3 ) acompanied by u, f, pb, zn and ag mineralization, the caic - alkaline and alkaline volcanic rocks occurred under the regional tension tectonic background in the early cretaceous

    摘要本文討論了北方造山帶東北段滿洲里額爾古納地區及其毗鄰區中生代構造流體成巖成礦系統及其演化的三個不同階段： 1 ）早中侏羅世張性「似裂谷環境」下所形成的中基性堿性火山巖、同熔性花崗巖及深源流體活動形成的稀土礦床和斑巖性銅鋁礦床； 2 ）晚侏羅世擠壓剪切環境下所形成的酸性火山巖、斑巖類及深源流體活動所形成的鉛鋅銀礦床； 3 ）早白堊世張性環境下所形成的基性堿性火山巖及深源流體活動所形成的鈾礦床、金銀礦床及螢石礦床。
  20. Spatial variability of soil pb - a case study from wutan town, chongqing city

    以重慶市吳灘鎮為例
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