sample concentration 中文意思是什麼

sample concentration 解釋
試樣濃縮
  • sample : n 1 樣品，貨樣。2 標本；榜樣，實例。3 【統計】典型取樣，抽檢查。4 【電訊】信號瞬時值。5 【冶金】 ...
  • concentration : n. 1. 集中。2. 【化學】提濃，蒸濃，濃縮；濃度；稠密度；【礦物】汰選，選礦，富化。3. 集中注意，專心。
  1. Antimicrobial effect of the bacteriocin produced by r21 - 4 is studied in the food systems. the results show that the conspicuous antimicrobial effect in the preservation of fresh milk. the samples were stored under 37 and the bacteria concentration in the sample with bacteriocin was 3 - 5 order less than the sample without bacteriocin

    考察了r21 - 4產生的細菌素用有機溶劑萃取制備的方法及其在食品中的防腐效果，結果表明，細菌素在消毒鮮牛奶的保藏中具有明顯的防腐效果，樣品添加細菌素在37保存24h - 48h后與對照相比細菌總數相差3 - 5個數量級，防腐效果顯著。
  2. Beer - lambert law, more commonly known as beer ' s law, states that the optical absorbance of a chromophore in a transparent solvent varies linearly with both the sample cell pathlength and the chromophore concentration

    比爾-朗伯定律，更多的被稱為比爾定律，是指在透明溶劑中發色團的光束吸收度隨著樣品電池路徑以及發色團濃度的變化而呈線性變化。
  3. The reaction rate is limited by the concentration gradient of oxygen in the sample.

    反應速率受試樣中氧濃度梯度的限制。
  4. A known amount of lycopodium spores was added to each sample to calculate the concentration of pollen ( grains / gram ). pollen was examined at magnifications of 100 + and 400 + and identified using modern pollen collections and published atlases

    P2 - 1 ：該亞帶木本花粉的濃度達到了9 . 79粒克，而草本植物花粉的濃度相對于p1帶有所下降，氣候條件較好，植被為草甸草原。
  5. Determination of end carboxyl content in pet chip using photometric method was discussed, the optimiza tion of measuring condition and parameters such as sample weight, concentration of titrant, blank of solvent were stud ied

    論述採用光度法測定聚酯切片的端羧基，對稱樣量、滴定劑的濃度、溶劑的空白等測試條件和參數進行優化選擇。
  6. For the sample with poly ( vinyl acetate ) based lpas, the morphology exists two transition points with the increase of lpa concentration

    對于含聚醋酸乙烯酯類lpa的試樣，形態隨著加入濃度的增加存在兩次明顯的轉變。
  7. Limit of quantification ( loq ) is the lowest concentration of the analyte in a sample that can be determined with acceptable precision and accuracy under the stated experimental conditions

    定量限系指樣品中被測物能被定量測定的最低量，其測定結果應具有一定準確度和精密度。
  8. The thermoelectric properties of the samples greatly depend on the doping elements and constituent concentration. the sample with la - dopant shows better thermoelectric performances than those with other three dopants. it should be pointed out that there exists an appropriate range of doping values to improve the thermoelectric properties of the samples

    這四種摻雜劑都不同程度的提高了材料的熱電性能，但只有摻la能夠很好的改善材料的性能，而且摻雜量不是越大越好，而是表現出有一個最優摻雜的限度。
  9. Using the two - site kinetic sorption model and the two - region model, cadmium transport in field soils was simulated, the average of the numerical solution of cd transport at every soils sample was obtained and the spatial distribution of cd concentration was computed

    用基於土壤水動力學和溶質運移的物理、化學非平衡模型的數值模型，模擬了污水淹灌條件下鎘在試驗小區土壤中的運移動態，獲得了鎘在土壤中淋溶的空間分佈。
  10. In this model reaction the concentration of product and substrate in solvent system is at a level of umol / ml. as the same time gas chromatogram ( gc ) permits rapid analysis of microliter quantities of sample with high resolution

    根據該模型反應中底物和產物都是微量的（ mol / ml ）這一特點，建立了以氣相色譜（ gc ） 、火焰離子檢測器（ fid ）作為手段的檢測方法。
  11. Because the concentration of zirconium in uranium has large ranges, from 1. 50xlo ' 6 - 3. 8g / gu, not only how to decrease the remainder of uranium to eliminate its determinate effect but also how to acquire higher recovery of zirconium is considered, so the method of silica gel, the method of tbp levextrel resin chromatography, the method of tta chromatography and the method of tta extraction are compared. then tta extraction is chosen to acquire the ideal separation purpose. compared with icp - ms and icp - aes, xrf has characters of high repeatability, stability, low cost, high concentration elements analysis, the ability to determinate solid sample and having comprehensive practicability, but xrf has lower sensitivity, so how to increase the concentration of the sample to acquire better precision is a difficult problem, the optimum of operating condition : the integral time of spectral lines is 60s, the integral time of background lines is 20s, the voltage of xrf is 50kv, the electric current is 50ma

    由於鈾中鋯的含量范圍很廣，從1 . 50 10 ~ （ - 6 ） 3 . 8g / gu ，在分離和測量時，既要考慮盡量地減少鈾的殘留量以消除鈾對鋯測量產生的影響，又要獲得鋯的理想的回收率，因此本文在分離方法的選擇上比較了硅膠吸附分離法， cl - tbp萃取色層法， tta萃取色層法和tta萃取分離法的優缺點，認為tta萃取分離法可以達到理想的分離效果。
  12. The main factors influencing the accuracy of the determination of permanganate index, include acidity of sample, water distilled water quality, potassium permanganate concentration, water bath temperature and titration time

    摘要影響高錳酸鹽指數測定準確性的主要因素有樣品酸度、蒸餾水水質、高錳酸鉀溶液濃度、水浴加熱溫度和滴定時間。
  13. On - line sample concentration techniques in capillary electrophoresis and their applications in forensic science

    毛細管電泳在線樣品富集技術及在法庭科學中的應用
  14. To explore the effect of bamboo stick contacting time with serum sample on serum potassium ion concentration, we have systematically measured serum potassium ion concentration of bamboo stick contacting with serum sample at different times using ion selective electrode method and analyzed their potassium ion concentrations using matching t test

    摘要為探討竹簽接觸血清樣品時間對鉀離子濃度影響的程度，採用離子選擇電極法分別對竹簽在血清中浸泡不同時間的樣品鉀離子濃度進行測定，並以配對t檢驗對不同浸泡時間的血清鉀離子濃度進行對比。
  15. It seems that bamboo stick contacting potassium ion may be a major reason resulting in making serum potassium ion concentration of serum sample with which bamboo stick contacted higher

    由此提示竹簽含鉀是導致與其接觸的樣品鉀離子濃度增高的主要因素。
  16. As the key of the sample injection, a digital control instrument of mass flow controller ( mfc ), which can work in online and offline mode, was designed. it can give 4 flow signals accurately at the same time. the concentration and flux of the sample gas can be set by the instrument software

    進樣裝置的核心是自行設計開發的新型流量控制儀，該儀器採用數字介面，可以以聯機和脫機方式工作，能夠同時快速準確地輸出4路流量控制信號，對測試氣體的流量和濃度進行設定。
  17. As testing result indicated that the concentration of benzene in the sample would be lower when benzene was released from it gradually, customs and excise department advised consumers to unpack the purchased goods and expose them in the open air for at least a week before using it indoor

    由於測試結果顯示苯成份水平會隨著揮發而漸見減少，因此海關提醒消費者，在購買塑膠軟地墊時，應在拆封後置于戶外通風處最少一星期才移至戶內使用。
  18. The residual manganese concentration of the groundwater treatment plants, which normally exceeds the limit of 0. 1 mg / l. based on the water sample of the laboratory of hunan university and by the aid of model experiment, the time needed for the cultivation of the biological filter were discussed, so were its affecting factors

    考察了濾柱培養成熟的時間及影響生物除錳效果的因素;研究了生物除錳的機理，建立了生物除錳反應動力學模型;探討了磷、 fe ~ （ 2 + ）等因素對生物除錳的影響，同時還研究了錳的去除與氧化還原電位的關系，對濾膜的結構進行了測定。
  19. Moreover, we observed the concentration profiles of the ion - implanted samples and the diffused samples by c - v method, and discovered that the carrier concentration decreased with increasing of the diffusion depth. whereas, the peak concentration of the ion - implanted samples located at 0. 248151 u m beneath the surface and the peak concentration of the diffused samples located at the surface. furthermore, the carrier concentration of mnas source diffused sample as high as 102 % m3can be obtained, and the surface was much smoother compared with that of the pure mn source diffused sample

    發現兩種摻雜方法的載流子濃度大體上都是隨著擴散深度的增加而下降，不同的是離子注入樣品的載流子最高濃度處于離表面深度0 . 248151 m處，而擴散樣品的載流子最高濃度處于表面，並摻錳（ mn ）砷化鋅（ gaas ）材料性質的研究且還發現相對于純mn源擴散樣品來說， mnas源擴散樣品的表面較為光滑，且表面載流子濃度高達1020 cm 』數量級。
  20. To examine the relationship between exhaustion index scores and concentration scores for individuals from their sample, load these scores into appropriately named arrays and instantiate the class with these array values

    要研究他們樣本中個人的消耗指數值與集中度值之間的關系，請將這些值裝入適當命名的數組中，並用這些數組值對該類進行實例化。
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