本底濃度 的英文怎麼說

中文拼音 [běndenóngdù]
本底濃度 英文
background concentration
  • 本 : i 名詞1 （草木的莖或根）stem or root of plants 2 （事物的根源）foundation; origin; basis 3 （本錢...
  • 底 : 底助詞（用在定語后, 表示定語和中心詞之間是領屬關系, 現在多寫作「的」）
  • 濃 : 形容詞1. （液體或氣體中所含的某種成分多; 稠密） dense; thick; concentrated 2. （程度深） （of degree or extent） great; strong
  • 度 : 度動詞[書面語] （推測; 估計） surmise; estimate
  • 濃度 : potency; thickness; concentration; consistence; strength; consistency; density
  1. In this research, the plant esterase of wheat and - ethanoic acid naphthalene ester were taken as materials to inspect the relation between the wheat esterase and the organic phosphorus, ten linearity equations were established which expressed the esterase vigor and the organic phosphorus density logarithm with the change of the numerical value of ultraviolet resorption, and the monotony range and the extremum of the function were confirmed

    摘要本研究以小麥為植物酯酶的酶源， -乙酸萘酯為底物，考察了小麥酯酶與有機磷農藥之間作用的關系，建立了10個以吸光值變化表示的酶活性與有機磷農藥濃度對數之間的線性方程，並確定了函數的單調區間和極值。
  2. The main effect factors include : 1. microbial species, which seem to have different degradation rate under varied circumstances and n - alkanes ; 2. physical and chemical properties of crude oil itself, which have an important effect on biodegradation, such as conglutination, boiling point, refractive index, ingredient and concentration of the oil ; and 3. culture condition of microorganism, under which the degrading activity of microorganism will be affected by surfactant, light condition, sorbent, nutrition, co - metabolite, oxygen, temperature and salinity during the inoculation of selected or indigenous microorganisms

    其中主要影響因素包括：菌種的影響，菌種在不同的環境中和對不同碳鏈長度的碳氫化合物表現出不同的降解效率；石油物質本身物理化學特性的影響，如石油物質在水體或土壤中的濃度以及石油的粘度、沸點、折射率等特性；生存環境條件的影響，在接種入高效率的降解菌或利用土著微生物進行降解時，降解率受到生存環境中各種條件的影響，如表面活性劑、光照條件、吸附劑的利用、營養鹽、共代謝底物、氧氣、溫度、鹽度等。
  3. This dessertation systematically researched dislocation and ab microdefects etched by molten koh and by ab etching respectively in gaas substrate, which were provided by merchants from home and overseas, as well as their influence on electrical parameters

    本文系統地研究了國內外各生產廠家提供的gaas襯底中用熔融koh腐蝕的位錯、 ab腐蝕液腐蝕出的ab微缺陷的密度和分佈情況以及它們對襯底電參數（電阻率、遷移率、載流子濃度）的影響。
  4. 2. the range of soil co2 concentration varied with soil temperature is not the same for the soil layer and its characters and different vegetation : the varied range of topsoil is higher than that of deep soil at testing woodland ; the varied range of soil layer ( - 20cm ) is the highest than that of the other soil layers ; the range of co2 concentration varied with air temperature begins to increase in turn from woodslay and shrublay to herbage

    由於植被覆蓋類型不一樣和所處的層位以及本身性質，表層帶巖溶生態系統各層的coz濃度隨溫度變化的幅度不一樣，林地表層coz濃度變化的幅度比深部大，裸地土下e0 。 zcoz濃度變化的幅度比表層和底層大，林層、灌層和草層coz濃度變化的幅度依次變小。
  5. Qiandaohu lake was very famous for its clean water quality. but in recent years the water body has become seriously eutrophic especially during summer months in some areas of the lake and came to the attention of national, provincial and city environment protection agency. the main objective of this study involved the following : sampling and monitoring water from the lake ; water quality assessment and biological assessment ; ascertain the limiting factors for phytoplankton growth ; fuzzy cluster analyse of water pollution of all sampling points ; predicting total phosphorus concentration in the lake by using static models ; setting up regression models and their application ; setting up an eco - dynamic model and its simulation

    本研究根據1998 - 2000年連續監測數據，對千島湖進行了水質評價和生物評價；分析了千島湖水體富營養化的限制性因子；同時根據千島湖各個取樣點的污染狀況，對千島湖進行水環境質量區劃；利用前人的經驗統計模型預測了千島湖現有的磷濃度水平及治理所需要削減的污染物負荷量；並且組建了多個回歸統計模型，運用這些模型預測千島湖水體中的總磷濃度；最後根據多年水質、底質、生物等方面的監測數據以及千島湖流域的氣象和社會經濟狀況的資料組建機理性的千島湖富營養化模擬模型。
  6. The vertical distribution of particle concentration is nearly linear, and the concentration at the bottom is 3 times larger than that at the top, which indicates that ca, the reference concentration of suspended particles in einstein ' s equation, is larger

    2u * ；顆粒的濃度沿垂線基本為線性分佈，底部比上部大3倍左右，說明einstein取的懸移質參考濃度ca會有所偏大。
  7. According to the requirement of innovation engineering in chinese academy of sciences, the work in this thesis focused on fabrication of soi material with epitaxial layer transfer of porous silicon and study of luminescence of modified porous silicon, and we obtained the following new results : the effect of doping and anodizing condition on the properties of porous silicon, including the microstructure, ciystallinity and surface morphology, has been studied systematically. it is found that the porous silicon and substrate have the same orientation and share a coherent boundary. but at the edge of pores, the lattice relaxes, which induces xrd peak moving of porous silicon

    Soi技術和多孔硅納米發光技術研究是當今微電子與光電子研究領域的前沿課題，本文根據科學院創新工程研究工作的需要，開展了多孔硅外延層轉移eltran - soi新材料制備與改性多孔硅發光性能的研究，獲得的主要結果如下：系統研究了矽片摻雜濃度、摻雜類型和陽極氧化條件等因素對多孔硅結構、單晶性能和表面狀態的影響，發現多孔硅與襯底並不是嚴格的四方畸變，在多孔硅/硅襯底的界面上，多孔硅的晶格與襯底完全一致，但在孔的邊緣，多孔硅的晶格發生弛豫。
  8. The mitochondria isolated from four different tissues of u. unicinctus can oxidize sulfide and produce atp at the same time. sulfide - stimulated atp production fluctuates as the sulfide concentration and the source of mitochondria change

    本研究還證明來自單環刺?不同組織的線粒體能夠以硫化物為唯一底物合成atp ，硫基atp合成能力因硫化物濃度和來源不同而異。
分享友人
分享到 Line

分享到臉書