activity stability 中文意思是什麼

Study on the isolated bacteriocin ' s property shows that the bacteriocin has good stability against temperature and ph. the antimicrobial activity is not influenced disposed for 10 minutes under 80, and only 13 % loss of activity is suffered under the temperature of 100 for 10min

對分離出的細菌素的性質研究表明，細菌素具有較好的熱穩定性和酸堿穩定性，在溫度80處理10min對活性沒有影響， 100處理10min活性僅損失13 ，在ph3 - 10的范圍內活性變化不大。

Execute floating rate to make the wave motion that is helpful for carrying exchange rate adjust economy, also be helpful for promoting international trade, especially below the situation that the foreign currency of centrally bank and gold reserve can ' t keep fixed exchange rate, execute floating rate to make relatively advantageous to economy, also can ban illegal foreign currency blackmarket to trade at the same time, but floating rate makes the stability that goes against domestic economy and international economy impact, activity of meeting aggravate economy

實行浮動匯率制有利於通過匯率的波動來調節經濟，也有利於促進國際貿易，尤其在中心銀行的外匯與黃金儲備不足以維持固定匯率的情況下，實行浮動匯率制對經濟較為有利，同時也能取締非法的外匯黑市交易，但浮動匯率制不利於國內經濟和國際經濟關系的穩定，會加劇經濟活動。

Thirty - one crystals of polyoxometalates ( 1d, 2d, 3d ) were prepared by means of middle hydrothermal technique, molecular design and self - assembly, and characterized structurally by single crystal x - ray diffraction. the thermal stability, activity of catalysis and magnetism of some compounds were systematically studied. the continuous appearance of p - v - o, p - mo - o, v - mo - o, v - o system with novel structure enrich polyoxometalate chemistry, the reaction characterization and the synthesis law of molybdates, tungstates and vanadates under hydrothermal conditions were explored

由於p - v - o 、 p - mo - o 、 v - mo - o 、 v - o體系新結構不斷出現，豐富了多金屬氧酸鹽化學，探討水熱條件下釩、鉬、鎢物種的反應特性和生成規律，研究原料的選擇、配比、加料順序、濃度、酸度、反應溫度、反應時間等因素對產物的生成及結構的影響，為新的催化劑、導電材料、磁性材料的研製與開發積累經驗。

Studies on the antibiotic activity and its stability of chitosan

殼聚糖的抑菌作用及其穩定性研究

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 。

Its enzymatic activity showed less similarity with gloshedobin. therefore, these three residues " replacement may influence the stability of the advanced structure of the enzyme

這兩類蛇毒類凝血酶基因的成功測序為其基因工程及其結構和功能的研究創造了條件。

This paper, in the light of the special geological environment and actual project situation of the three gorges reservoir area, puts forward a comprehensive analysis and evaluation system suitable for the stability analysis of the bank landslide of the three gorges reservoir area under the premise of thorough consideration of the water influence on the stability of the bank landslide, and obtains the following achievements in several aspects that have the practical application significance and certain scientific research value : ( 1 ) it is discovered that the water activity is the primary factor of the formation of the new landslide and the revival of the ancient landslide. on the one hand, the rising underwater level reduces the actual stress of landslide ; on the other hand, the long time soaking of the underwater reduces the mechanics intensity of the landslide and the slide belt, both of which reduce directly the landslide stability ; ( 2 ) in view of the special condition of the three gorges reservoir area, this paper analyzes systematically the forces acted on the landslide of the three gorges reservoir area and the force varieties acted on the divided landslide when the water level changes between 175 meters and 145 meters. thus it is more scientific and comprehensive for the analysis of the forces acted on the landslide ; ( 3 ) this paper summaries systematically 10 kinds of typical computation projects by organic combinations of different kinds of situations in the dry season ( nature statue ), rainy season ( rainstorm or rains for a long time condition ), with 175m water level in the reservoir, during the earthquake, with the water level of the reservoir adjusted from 175m to 145m and so on, and produces

本文針對長江三峽庫區特殊的地質環境與工程實際情況，在充分考慮水對庫岸滑體穩定性影響的前提下，提出了一個適用於長江三峽庫岸滑坡體穩定性分析的綜合分析評價體系，並取得了如下幾個方面具有工程實際意義和一定科學研究價值的研究成果： （ 1 ）研究結果發現，水的活動是新滑坡形成或古滑坡復活的主要因素，一方面是由於地下水位升高降低了滑坡體的有效應力，另一方面是由於地下水的長期浸泡降低滑體及滑帶的力學強度，這兩方面的因素均將直接降低滑坡的穩定性； （ 2 ）針對三峽庫區的特殊條件，系統分析了作用於三峽庫區滑坡體上的力系和庫水位在175m與145m間變化時滑體條塊的受力變化，從而使對作用於滑坡體上的力系分析更科學、更全面； （ 3 ）通過對滑體處于旱季（天然狀態） 、雨季（暴雨或長期降雨狀態） 、 175m庫水位、地震以及庫水位由175m調節下降至145m等各種不同情況的有機組合，本文系統地歸納總結出了10種典型計算工況，並具體給出了相應的作用荷載的計算方法，使在庫區岸坡滑體穩定性分析評價時對計算工況選擇及其作用荷載的計算更具規范性； （ 4 ）具體運用c + + builder開發了關于滑坡體穩定性綜合分析評價系統，使對滑坡體穩定性分析計算更方便、更準確； （ 5 ）將上述滑坡體穩定性綜合分析評價系統應用於重慶市豐都縣名山滑坡穩定性分析的具體事例中，分析結果表明，本文所提出滑坡體穩定性綜合分析評價方法對三峽庫區的滑坡穩定性分析是實用可行的。

The extracellular a - amylase from the hyperthermophilic archaeon pyrococcus furiosus, pfa, is a promising candidate in starch processing, since it is optimally active at 100 and ph5. 5 - 6. 0 and does not require ca2 + for activity or thermo - stability

來源於強烈火球菌（ pyrococcusfuriosus ）的-澱粉酶（ pfa ）具有應用於工業的潛力，因為其最佳反應溫度達100 ，最佳ph為5 . 5 6 . 0 ，且其活力或熱穩定性的維持不需要添加鈣離子。

This article described the deformation features of taojiaba landslide and analyzed the inner factors, geologic setting, topography, morphology, stratum, lithology and texture, and the external influence factors, precipitation, flood, human activity, neotectonic activity and earthquake, and the transform features of landslide in the near future, and evaluate stability of landslide through the section coefficient method calculation on basis for landslide mechanism analysis and control work

摘要陶家壩滑坡基本特徵顯示，滑坡變形的主要影響因素有：地質環境因素（地形地貌、地層巖性、物質結構） 、外界影響因素（降水因素、洪水因素、人為因素、新構造及地震） ，以及滑坡近期變形特徵，通過剖面遞推系數法計算，對滑坡的穩定性進行了評價，為滑坡機制分析和優化整治措施提供依據。

By treatment with both ultraviolet rays and licl, a mutant strain b. s. lx - 19 with high yield of heparinase and stability was obtained, whose enzyme activity increased by 40 % over strain lx - 10

Lx ? 19 ，其肝素酶產量較出發菌株提高了40 。通過單因素條件研究，發現n源和c源對酶產量影響較大，接種量以10 ，初始ph6 . 5 ，種齡12h為宜。

The md simulation data were analyzed in terms of average atomic positions, root mean square ( rms ) fluctuations, monomer - monomer interactions, hydrogen bond ( h - bond ) network, secondary structure, and so on. through the comparison, we found that when the system includes zn2 + ions and phenol, the stability of insulin hexamer is enhanced, but the conformational flexibility related to its biological activity is decreased. in addition, the insulin hexamer tends to dissociate in the absence of zn2 + and phenol

通過對這兩個模擬所得到的軌跡在原子的平均位置、方均根漲落、方均根偏差、單體之間相互作用、氫鍵網路、二級結構等方面進行的比較分析發現，對于包含鋅離子和苯酚的體系，胰島素六聚體的穩定性得到了增強，但其構象柔性卻受到了削弱；對不含鋅離子和苯酚的體系，胰島素六聚體的穩定性明顯減弱，構象柔性卻表現得較為突出，在這種情況下，胰島素六聚體還表現出解聚的傾向。

The suitable steaming and support treatment on zeolite beta can obviously increase the hydration activity of catalysts, and the introduction of sillica enhances the steaming stability of zeolite beta

對沸石進行水熱處理和不同粘合劑改性，能提高其丙烯水合反應活性；氧化硅的引入能明顯提高催化劑的活性和水熱穩定性

Cambodia : political stability, diplomatic activity and economic development

政治穩定外交活躍經濟發展

However, every aspect has different developmental condition, with activity being the most stability factor and other four aspects having greater variabilities across ages

情緒性、反應性、社會抑制和專注性均隨年齡增長而變化發展，其轉折年齡各有不同。 4

Mechanical test results must be evaluated in conjunction with catalyst activity, selectivity, and stability data.

必須將機械測試結果和催化劑活性、選擇性和穩定性數據聯系起來進行綜合評價。

Studies on antioxidative activity and stability of cranberry pigment

酸果蔓色素的抗氧化活性及穩定性研究

Even if, in the end, much of our banking, debt and equity market activity is denominated in foreign currencies, this should be seen as a reflection of our success in the development of hong kong as an international financial centre while safeguarding monetary and financial stability in hong kong

即使最終本港銀行債券及股票市場的大部分活動都以外幣計算，我們亦應將之視為已在維持本港貨幣及金融穩定的基礎上，更進一步發展我們的國際金融中心地位。

A further research indicates that the electro - catalytic activity and longtime stability of pt / ti electrode are much better than those of pure pt electrode

進一步研究表明該塗層同純鉑電極相比，顯示了很強的電催化活性和長時間穩定性。

The results showed that instability of operation temperature and increase in space velocity and pressure would cause deterioration of the activity stability, resulting in shorter service cycle

結果表明，操作溫度的不平穩、空速及壓力的提高均會造成催化劑活性穩定性變差，運轉周期縮短。

Influence of operation condition and basic nitrogen compounds in the feed oil on activity stability of the catalyst was investigated

考察了操作條件及原料中的堿性氮化物對催化劑活性穩定性的影響。