specific surface value 中文意思是什麼
specific surface value
解釋
比表面值-
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 。 -
Firstly this paper points out that the mainstream value investment theories limits to some stratifications, such as market, business or product, technology and administrative levels, but it neglects the organizational idiosyncracy of the crux of the value factor, and it ' s better essence, better deep, better lasting than others. secondly this paper inducts and introduces collins " organizational idiosyncracy ideas, points out the importance of value investment theories " development ; and then establishes investigating index system of organizational idiosyncracy, through the way that from the surface to the core achieved a comprehensive summary of its external demonstrations in a large degree. to approve the effectiveness and operativeness of the investment index system in its application, this paper has chosen the specific cases in various corporations of different industries both at home and abroad, and made a various analysis of them, so that affirmed the advance and feasibility of the organizational idiosyncracy investment methods
本文首先指出主流價值投資思想主要局限於市場、業務（產品） 、技術和管理層等層次，而忽視了組織特質這一更本質、更深層、更持久的關鍵價值因素；其次引入並評價了柯林斯的組織特質思想，指出了它對投資思想發展的意義；然後形成了一套組織特質的評價指標體系，利用該體系由表及裡的，在最大程度上實現了對組織特質的全面概括；同時為了證實該指標體系的有效性，選取了國外公司、我國不同行業的不同公司進行了個案分析，通過對不同組織特質狀況企業的多角度分析確認了組織特質投資方法的先進性和可行性；最後對組織特質投資方法的適用性和局限性予以了總結。 -
The experiment results denoted that the best dispersive condition of 3y - tzp was that ph value is 9. this result has distinct difference to nanoscale m - zro2. the main reason is that the absorb ability has weaken result from the reducing of specific surface
實驗結果表明微米級3y - tzp顆粒分散的最佳分散條件為ph值為9 ，與納米m - zro _ 2明顯不同，這主要是因為其比表面減少導致其吸附能力減弱的緣故。 -
And the value drop to the lowest at ph = 0. 8. as the increase of heat treatment temperature, the pore size distribution peak of sio2 microspheres is very narrow, meanwhile the specific surface area is the smallest before 160 c. the polymer template is removed at 350 c, so the pore structure of sio2 particles has a big change which involve the increase of specific surface area and the broaden of pore size distribution peak. with the continuous raise of temperature the sio2 network will shrink little, as a result the average pore size will decrease, but the specific surface area has no obvious change
結果發現：二氧化硅膠體顆粒均勻分佈於脲醛聚合物網路中，煅燒去除有機模板后微球表面變粗糙，而粒徑沒有明顯變化； ph值較小時，復合微球中聚合物含量較大，而ph值較大時，得到復合微球結構鬆散，因此熱處理后的二氧化硅微球孔容及平均孔徑都較大，而在ph = 0 . 8時，得到最小值；武漢理工大學碩士學位論文隨著熱處理溫度的變化，小於160時，空分佈較窄，而比表面積較小，在350時，由於有機模板的去除，微球孔結構發生突變，比表面積明顯增大，而孔徑分佈變寬，溫度繼續升高時，二氧化硅網路發生收縮，平均孔徑變小而比表面積由於有機炭化物的完全去除沒有太大變化;微球中的微孔在熱處理過程中處于平衡狀態，分佈沒有太大變化。 -
The purity and composition uniformity were very high, and the specific surface area was 67 - 156 nm. in the third part, surface modification of sn - in2o3 nano particle was studied and some conclusions were drawn finally. kh560 and kh570 were selected as surface modification agents, and the concentration of them was 0. 5 - 1 wt %, and ph value was controlled for 5. 4, and the best milled technology were 72 hours
本文第三部分，結合丙烯酸酷類單體，對sn一inz仇納米微粒進行表面修飾研究，最後得出選用kh一560和kh一570作表面修飾劑，添加量為0 . 5一lwt %左右， ph值為5 . 4左右，採用球磨72小時，輔助超聲分散工藝時， sn一in20 :納米粉的分散性較好，且與基體有較好的相容性。 -
The changes of specific surface area before and after sintering were measured by nitrogen adsorption. the results show that the surface of sioi particles become coarser along with the remove of polymer template, but the particle size keep no change. the composite microspheres include more uf polymer under low ph value but turn into more looser under high ph value, so the result mesoporous sioi microspheres have big pore volume and average pore size
對脲醛sio _ 2復合微球進行熱處理后得到介孔二氧化硅微球，用示差掃描量熱（ dsc ）熱重（ tg ）分析研究了脲醛sio _ 2復合微球的脫水、脫醇及有機物炭化分解的過程；用氮氣吸附法分析了不同ph值、熱處理溫度對介孔二氧化硅微球的比表面積及孔結構的變化影響；用sem表徵了不同ph值下二氧化硅微球的形貌變化。
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