specific activity 中文意思是什麼

Moreover, the presence of the activities of aerobes and anaerobes in the immobilized sludge is further conformed by specific activity experiments in aerobic and anaerobic conditions, and the microorganism community structure of the co - immobilized granular sludge in micro - aeration condition is also deduced

厭氧好氧活性實驗也進一步證實了固定化顆粒污泥中厭氧、好氧菌活性的存在，並進一步推導出了微氧條件下氯酚固定化顆粒污泥的菌群結構。

The comparison of two different methods of analysing specific activity of caesium - 137 in biological samples

137活度濃度的兩種分析方法比較

Go isozyme displayed high specific activity varied from 90 to 197u / mg

證實該go同工酶具高活性（ 90 197

Specific activity of the rude recombinant phytase is 461575. 8 u / mg

重組植酸酶粗酶比活力為461575 . 8u / mg 。

User code end to add the business logic for the specific activity, as shown in

之間插入您的代碼，為特定的活動添加業務邏輯，如

Overexpression of selenomonas ruminantium phytase with high specific activity in pichia pastoris

的高比活植酸酶基因在畢赤酵母中的高效表達

The recombinants were constructed by transforming ppic9 a - xynb into p. pastoris gs115. the assay results revealed that the xylanase gene xynb was overexpressed and secreted effectually in p. pastoris. in 3l fermentor the expression level of xylanase xynba exceeded 1200iu / ml and the expressed xylanase had normal bioactivity. the molecule weight of xynba was determined as about 31kd which is higher than 23kd of original enzyme xynb from streptomyces olivaceoviridis a1. xynbb was gotten by deglycasylation of xynba, whose molecule weight returned to 23kd. we comparised the enzymatic properties of xynba expressed in p. pastoris, xynbb deglycasylated from xynba and xynb produced from streptomyces olivaceoviridis al : there was little difference among the three enzymes on optimal ph, the optimal ph of xynb and xynba were both 5. 2, the optimal ph of xynbb was 5. 0 ; the optimal temperature of xynb and xynba were both 60 c, while the optimal temperature of xynbb was 50 ? ; because of glycosylation the thermal stability of xynba was better than xynb and xynbb ; the specific activity of xynba and xynbb were 883. 88iu / mg and 832. 5hu / mg respectively, which were both lower than 2814. 45iu / mg of xynb ; the km values of xynb and xynba were similar to each other which were 21. 56 ( g / kg ) and 20. 87 ( g / kg ), while the km value of xynbb was 27. 10 ( g / kg ) ; the fmax of xynba and xynbb were 4568umol / mg. min and 5329umol / mg. min respectively which were lower than 27623 umol / mg. min of xynb ; additionally all of the three enzymes did not display cellulase activity. they all had well resistance to pepsion and trypsin, and were not sensitive to metal iron, surface active agent and chelating agent. the analysis of different xylans enzymatic hydrolysate revealed : by xynba, that the main constitutions of enzymatic hydrolysate of birch wood xylans were xylotriose and xyloquaiose, which account for 68. 43 % and 16. 50 % respectively, additionally there was 11. 79 % of xylobiose ; the main constitutions of enzymatic hydrolysate of corncobs xylans were xylobiose and xylotriose, which account for 81. 78 % and 11. 55 %. the result indicated that this xylanase was a kind of 1, 4 - b - d - xylanohydrolase and was fit to used in industrial procession of xylooligosacc harides

進一步對xynba進行了脫糖基化處理得到xynbb ，其分子量恢復到23kd ，證明xynba是糖基化蛋白。通過對畢赤酵母重組表達的木聚糖酶xynba 、脫糖基化的木聚糖酶xynbb以及橄欖綠鏈黴菌a1所產原酶xynb之間酶學性質的比較發現：三種酶的最適ph差異不大， xynb和xynba均為5 . 2 ， xynbb為5 . 0 ； xynb和xynba的最適溫度均為60 ， xynbb降為50 ：在耐熱性上， xynba由於糖基化作用熱穩定性明顯高於未糖基化的xynb和xynbb ； xynba和xynbb的比活性分別為883 . 88iu mg和832 . 51iu mg ，明顯低於原酶的比活2814 . 45iu mg ； xynb和xynba的km值相當，分別為21 . 56 （ g kg ）和20 . 87 （ g kg ） ，而xynbb的km值較大為27 . 10 （ g kg ） ； xynba和xynbb的vmax相差不大，分別為4568 mol mg ? min和5329 mol mg ? min ，明顯低於xynb的27623 mol mg ? min此外三種酶均無纖維素酶活性，對胃蛋白酶和胰蛋白酶有很好的抗性，且對作用環境中的各種離子、表面活性劑、螯合劑不敏感。通過對不同木聚糖的酶解產物的糖份分析發現：以樺木木聚糖為底物時，酶解產物主要為木三糖和木四糖，含量分別為68 . 43和16 . 50 ，另外還含有11 . 79的木二糖；以玉米芯木聚糖為底物時，酶解產物主要為木二糖和木三糖，含量分別為81 . 78和11 . 55 。

3. 2. 1. 4 ) which was prepared by precipitation of the water extract of the culture of aspergillus niger with ammonium sulfate and desalted by sephadex g - 25, and was further fractionated by two steps of deae - toyopearl 650m and one step of poros 20pi chromatography. the other was a p - glucosidase ( ec. 3. 2. 1. 21 ) which was prepared by the above g - 25 fractions and was further fractionated by two steps of deae - toyopearl 650m chromatography. the specific activity of the endoglucanase with sodium carboxymethyl cellulose was estimated to be 433. 38 hj / mg

-葡萄糖苷酶對水楊素的比活力為597 . 12iu mg ，並對其專一，不能水解棉花和羧甲基纖維素鈉；分子量為117 . 5kda ，加dtt後分子量不變；該組分最適ph和溫度分別為4 . 5和70 ，在ph5 . 0 、 50下對水楊素鈉的米氏常數km為3 . 73mg ml ，最大反應速度vm為0 . 088mg葡萄糖（ ml ? min ） ；與文獻中從黑麴黴中分離的-葡萄糖苷酶比較后發現，該組分是一個新的-葡萄糖苷酶。

The results showed that temperature 25 - 30, ph7. 0, anaerobic and illuminated conditions were optimum for decolorization. when reactive violet kbr was decolorized as sole source of carbon and energy of n strain, the decolorization rate of reactive violet kbr was significantly correlative to cell concentration, however the decolorization specific activity of n strains was not affected markedly by cell concentration

結果表明，該菌株生長細胞脫色的最佳條件為溫度25 - 30 ， ph7 ，厭氧條件下的脫色率遠遠高於好氧條件下的脫色率。染料作為該菌株唯一的碳源和能源脫色時，脫色率與細胞濃度呈極顯著相關，細菌脫色比活率保持在較恆定的水平。

The purified enzyme had a specific activity of 68. 6 u / mg protein. overproduction of pga was often limited by translocation and / or periplasmic processing steps, subsequently resulted in intracellular accumulation of various types of pga precursors and then formed inclusion bodies in the cytoplasm and / or periplasm

經deae - sepharosecl6b離子交換層析和butyl - sepharosecl4b疏水層析，即可得純度提高20倍、比活為68 . 6u mg的青霉素g酰化酶，兩步純化的總得率達91 。

The presence of calcium is beneficial to obtain higher tryptophanase activity. the activity of tryptophanse expressed by addition of appropriate concerntration of iptg is 91 - fold higher than that of no induction. the highest specific activity was

0 . 2mmiptg對菌體的生長有抑制作用，在細胞對數生長期前期誘導抑制最強烈， 0 . 1mmiptg基本不抑制生長；臨界濃度0 . 15mm的iptg和37ac是比較好的組合。

With the procedures, the overall recovery of enzymatic activity reached 20 % and the specific activity for substrate hydantoin was about 4 u / mg protein. the purification factor was about 4. 7 folds with the purity about more than 95 % as estimated by sds - page analysis. d - hydantoinase gene from strain ss - ori was cloned to five different vectors to be five recombinant plasmids and in turn to transfer into five different e. coli strains, respectively

對其中產酶活性最高的一工程菌pexsec一hdt /雲coljblz ] （ de3 ）海因酶的表達條件進行了研究，目的蛋白的表達量約占總菌蛋白的20 % ，其酶活力為0 . 92u / ml ，約是原始菌株的d一海因酶表觀活性的4 . 6倍。

Sepharose affinity chromatography. the apparent molecular weight of purified ghrp - scu - pa - 32k was 33kd by sds - page and mass spectrometry and its specific activity was 150000iu mg protein, according to fibrin plate determination

經鋅離子螯合親和柱純化的產物， sds - page顯示為單一蛋白條帶，分子量為33kd ，質譜法測定分子量也為33kd 。

Shieldings for detectors for nuclide - specific activity measurements - standard - systems with germanium detectors

核素單位放射性測量用檢波器屏蔽.帶鍺檢波器的標準系

The most often used units of specific activity(abbreviated sp. act. ) are curies/mole.

最常用的比活性（符號是SpAct）單位是居里克分子。

The most often used units of specific activity ( abbreviated sp. act. ) are curies / mole

最常用的比活性（符號是sp act ）單位是居里克分子。

However, depending on the differences among e. coli strains, and the procedures used to extract and purify endotoxin that serves as standard for these measurements, some differences might occur in the specific activity

然而，依靠大腸桿菌張力的不同，用這些測量法的標準，過程中曾經析取和凈化內毒素，一些不同的力量存在比活性。

In order to verify the natural radioactivity level, of tin polymetallic ore in southeast yunnan, and find out radioactive pollution in mining, dressing and smelting processes, 10 tin ores in this area were chosen to measure radionuclides ' specific activity in each kind of tin polymetallic ore, undressed ore, ore concentrate, debris and smelting slag

摘要為查明滇東南錫多金屬礦天然放射性水平，了解錫礦采、選、冶過程中的放射性污染，選擇了該區10個錫礦山，測量了各類錫多金屬礦原礦、精礦、尾礦及冶煉爐渣放射性核素比活度。

Variation of pi was related to subunits dissociation. go isozyme was unstable and its molecular weight ( mr ), specific activity and pi decreased during purification

Go同工酶在純化過程中很不穩定，其全酶分子量（ mr ） 、活性和pi均會下降，這可能是造成目前報道的go的mr和pi等基本參數相差很大的原因。

3. the extracellular phb depolymerase was purified from 09 by using hydrophobic column chromatography and gel filtration technique in sephadex g - 100. the specific activity of the purified enzyme was increased by 37. 9 folds over crude extract, and the recovery yield was 8. 9 %

以粗酶液為起始，經硫酸銨分級沉澱、 sephadexg - 100凝膠過濾后，分離純化了該酶，純化倍數約為37 . 9 ，酶活力回收率8 . 9 。