transformation frequency 中文意思是什麼

transformation frequency 解釋
轉化頻率
  • transformation : n 轉變，變化；變形；【生物學】（尤指昆蟲的）轉化，變態，改造，改革；變質；【數學】變換；【電學】...
  • frequency : n. 1. 屢次，頻仍，頻繁。2. （脈搏等的）次數，出現率；頻度；【物理學】頻率，周率。
  1. In case kidney - qi is deficient, there will be the disturbance of its qi transformation and astrictive action, causing the irregular opening and closing of the urinary bladder, manifested as dysuria, incontinence of urine, enuresis and frequency of micturition

    如果，腎氣不足，一方面可使腎氣化無常，固攝無權，則膀胱開合失度，即可出現小便不利，失禁，遺尿，尿頻等病癥。
  2. In this study, the stem segments of new shoot with axillary buds of well - growth tetraploid black locust trees were used as explants. the effects of different basic mediums, different hormone kinds and their concentrations ratios, different sucrose concentrations on calli induction, buds differentiation and rooting in the process of establishment of high frequency regeneration system of tetraploid black locust were studied. on the base of high frequency regeneration system, the effects of various factors on transformation efficiency of badh mediated by agrobacterium tumefaciens were discussed in the light of gus histochemical assays

    本實驗首先以生長良好的四倍體刺槐優株上當年生新梢的帶腋芽莖段為外植體，研究了在四倍體刺槐高頻再生體系的建立過程中不同基本培養基、不同激素濃度及其配比、不同蔗糖濃度對愈傷組織的誘導、芽的分化及生根的影響；然後在得到高頻再生體系的基礎上，通過農桿菌介導法轉化甜菜堿醛脫氫酶（ badh ）基因，以gus染色組織分析為依據探討了影響轉化效率的各種因素，建立了高效、可重復的基因轉化體系，為四倍體刺槐目的基因的導入打下了基礎。
  3. This article narrated the high - pressured frequency changer in iron - smelting dust removal system transformation analysis as well as the economic efficiency analysis

    本文講述了高壓變頻器在煉鐵除塵系統中的改造分析以及經濟效益分析。
  4. Identification and transformation of frequency distributions

    頻率分佈的識別和轉換
  5. The other research purpose is to discover characteristic information and reliable methods of reflecting spinal cord damage. due to typical damage indicators, amplitude and latent period, have bugs such as limited information and weak stabilities, this project recommends applying time - frequency analysis to monitoring spinal cord function. through analysing and comparing typical signal with stft and cwt, it is proved indicators under time - frequency distribution can be better in reflecting signal changes, espcially the wavelet transformation

    針對目前ep監測中判定脊髓損傷的指標（波幅和潛伏期）存在信息量相對較小、穩定性較差的缺陷，本課題提出利用時頻分析技術對術中脊髓功能監護進行研究，通過短時傅立葉變換和小波變換分析和比較典型信號的時頻分佈，證明時頻特徵參數能更有效的提取信號的變化信息。
  6. The materials as explant in transformation come from birch leaf, stem segment and leaf stalk, and the spider toxin gene was used as foreign gene for this transformation experiment. it showed that the best explant was the big leaf, on which the transformation frequency was 22 %. by gus detection, there were 43 percent of the plants with kanamycin resistance, and 100 percent of positive result, by pcr amplification, was gotten from random sampling

    利用雙元載體的根癌農桿菌lba4404菌株（ agrobacteriumtumefaciens ） ，含質粒pyhy （目的基因及npt 、 gus基因） ，對白樺試管苗莖段，葉柄，葉片三種外植體進行侵染，結果表明：大葉片生長勢強，為轉基因的最優外植體，轉化率能夠達到22 。
  7. Electric - controller is nubbin in developping. we are based on designing to structure of circuit, we are dead against in time and stabilization for controlling and communications, precision and rapidity for transformation etc. we have completed to select on microprocessor, clock - frequency and a / d transfer. it carry out transformation for valve position signal, and select on solid - switch ac

    在控制器的電路結構設計的基礎上，考慮到通訊、控制的及時、穩定、轉換的精度和速度等幾方面，主要完成對微處理器的選擇、時鐘頻率和a d轉換器的選用，閥位變送功能的實現，固態交流開關和顯示器的選擇等。
  8. The engineering bacterium which carried bcih i - chi and i - glu cdna was pcg - ii. two methods of agrobacterium - mediated and gene gun were used to transformate long ya lillium. the results of pcr analysis and southern dot blotting hybridization demonstrated that the chi a nd glu cdna have been intergrated into host genome. at the same time ; compared agrabactenum - mediated method with gene gun method, the transformation frequency of the former was 16. 7 %, while the latter was 50 %, so gene gun transformation method was suitable for long ya liiliwn

    用攜帶有幾丁質酶基因和- 1 、 3葡聚糖酶基因的工程菌，通過農桿菌介導法和基因槍轉化法轉化龍牙百合，經pcr和點雜交檢測證明外源基因已經整合到植物染色體中。同時對農桿菌介導法和基因槍法進行比較，發現農桿菌介導法的轉化率為16 . 7 ，基因槍法的轉化率為50 ，因此可能基因槍轉化法更適于龍牙百合的遺傳轉化。
  9. By performing fourier transformation, the relationship between the turbulent intensity of the particle and that of the carrier fluid was obtained which makes clear that particle size, specific gravity, velocity gradient, and the characteristic frequency of energy - containing eddies are four basic influencing parameters. it is proven theoretically that under certain conditions, the stream - wise and transverse particle turbulent intensities exceed those of the carrier fluid. based on the equations of two - phase flow, the presence of fine sediment suspension is shown to attenuate the turbulent intensity of the water

    通過對細小顆粒在剪切流場中運動方程的fourier分析，得到了顆粒脈動強度和流體脈動強度之間的定量關系，表明顆粒粒徑、顆粒密度、流速梯度以及紊動場含能旋渦的特徵頻率是影響顆粒脈動強度的主要因素，首次從理論上證明了在一定條件下，顆粒在縱、垂向的脈動強度均會超過相應的流體脈動強度，為已有的實測資料提供了合理的解釋。
  10. Due to the short distance among the planes which fly in a group, the conventional low resolution radar can not distinguish them in both distance and azimuth ? if we use the technology of isar to resolve the difference among doppler frequency of the targets and obtain a fine resolution cross - cross image, we may separate them, but a long time of coherent processing is needed <, for the formation targets, it can be approximately divided to rigid body and nonrigid body, so for the formation targets, that can be regarded as rigid which has a relative position and an identical movement, can be approximately considered as a large target, and be compensated by translational phase with the rule of minimum entropy, but for the most those cannot accord with the approximation of rigid, being the doppler - frequency of the aim is linear changed, by the relax method with short data, increases the resolving performance of multiple target to the aim in the frequency domain, since cross - range resolution is based on the accumulative time, so it is greatly improve the resolution to formation targets by the instant cross - range image which produced by radon - wigner transformation

    低分辨isan成像及干涉技術應用研究一因此直接無法分辨編隊目標的架數，我們借鑒isar的技術，通過較長時間的相干積累，在多普勒頻域上對目標進行分辨。而對于編隊目標，可分為近似剛性的多目標和非剛性的多目標，所以對于可以近似為剛體的編隊目標相對位置固定，運動方式一致，可以近似看作一個大目標，採用最小墑準則對平動相位的進行補償，但是大多數並不滿足剛體近似的編隊目標，由於目標在相干積累時間的多普勒頻率近似呈線性變化，通過對較短數據利用relax的時頻分析方法，提高了頻率域上目標分辨的性能。由於橫向解析度取塊于橫向積累時間，所以利用radnwigner變換得到瞬時的一維橫向距離像大大提高了對編隊目標的分辨，對模擬和實測數據的大量分析結果表明此方法的有效性和可行。
  11. The transformation frequency achieved lo ^ cells / ug dna when pseudom onas fluorescent, was grown to 0. 55 at odr, oo, and incubated for 2 minutes at 42 xh prior to treatment with 25mmol / l cacl2

    獲得克隆子lzng -一20a和lzr19一20a .在iptg誘導下，不管插人的屍2嘆基因是正向還是反向，都能保護cyt人蛋白對大腸桿菌的致死作用
  12. Pcr, pcr - southern blot analysis, southern dot blot analysis of lettuce dna confirmed that adw gene had been integrated into the plant genome. the results also showed that the transformation frequency of pb - adw was higher than that of pbg - adw, which suggested that camv35s promoter would be better than pi ii promoter in the case of transgenic lettuce

    （ 3 ）細胞核載體pb - adw 、 pbg - adw均採用農桿菌介導法將adw導入萵苣，細胞核轉化獲得了生長良好的抗性萵苣植株，經pcr 、 pcr - southern 、 southern斑點雜交分析證實， adw基因已整合到萵苣基因組中。
  13. The result of study on the factors affecting the transformation frequency showed : the leaf disc was pre - cultured for 2 days, infected for 20 minutes, co - cultivated with agrobacterium eha105 for 2 days, which could improve regeneration efficiency. the highest regeneration efficiency was 13. 3 % in this experiment

    實驗結果表明：葉片預培養2d ，農桿菌浸染20min ，與農桿菌共培養2d時，篩選培養基上洋桔梗葉盤不定芽分化頻率最高，達13 . 3 。
  14. Ph value increase from 4. 5 to 6. 5 strongly stimulated hairy root formation and higher ph value ( above 7. 5 ) inhibited it. under the optimized condition, the transformation frequency of torenia approached 90 %

    預培養和共培養培養基ph從4 . 5提高到6 . 5時，毛狀根誘導率顯著提高，但是當提高到7 . 5時，誘根率卻顯著下降。
  15. The optimized parameters of high - frequency in bacillus thuringiensis plasmid - free mutant bmb171 by electroporation was studied. it showed that a highest electro - transformation frequency could be obtained, when sg solution was used as the buffer, and a 10. 0 kv / cm of field strength, one time of pulse as well as a growth phase of recipient cells at the exponential phase ( od650nm value was 0. 2 - 0. 3 ) were selected

    對用電脈沖法轉化蘇雲金芽胞桿菌受體菌bmb171優化條件的研究結果表明，採用sg溶液作電脈沖緩沖液，用10 . 0kv cm的脈沖場強和1次電脈沖（ 4 . 6ms ） ，以及採用對數前期（ od _ （ 650 ）約0 . 2 0 . 3 ）收獲的受體菌，可以達到最高轉化頻率。
  16. Negative pressure disposition in the process of agrobacterium tumefaciens infecting callus was found to be able to improve transformation frequency of indica tested rice apparently

    以yeb培養基作為共培養培養基，對于農桿菌eha05 … ub m ）來說，菌液濃度為od值一0
  17. Chinensis were also studied. the developmental status of seedlings, vacuum infiltration time, type of agrobacterium tumefaciens used, all influence the transformation frequency

    結果表明植株生長階段和真空滲入處理時間，所用菌株類型均對轉化率有影響。
  18. The author discussed the determination of selection pressure, measured the growth of calli and analyzed the influences of regeneration media on the regeneration of resistant calli in order to get some parameters to enhance the indica rice transformation frequency of particle bombardment

    從秈稻基因槍轉化過程中選擇壓的確定、愈傷組織的生長規律以及不同分化培養基對抗性愈傷出苗率的影響上，探討了可能提高秈稻基因槍轉化頻率的參數。
  19. Using calli as explants, the transformation frequency could be greatly improved. using low ph medium ms to activate agrobacterium, and when its concentration is about od0. 3 ~ 0. 7, are the best conditions for inoculation

    Zing l活化農桿菌可提高轉化效率； as可顯著提高轉化效率，其濃度以20t時效果最好；菌液濃度對轉化效率也有影響，以od 。
  20. Acetosyringone ( as ) could dramatically improve transformation frequency, its suitable concentration is 20 mg. l " 1. before inoculated with agrobacterium, calli should be precultured 1 ? days, and the appropriate inoculation time is 4 ~ 8 minutes, and then cocultured for 3 ~ 4days. then the cocultured calli were transferred to ms medium containing 400 mg. l " 1 cef

    7為宜；侵染前預培養1 2天，可顯著提高轉化效率；侵染時間以4 8分鐘為宜；共培養時間3 4天較適合；轉化后暗培養對轉化效率沒有影響；選擇方法以延遲選擇15天選擇轉化率最高。
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