The invention uses the fermentation liquor of one Escherichia coli generating polysialic acid as material, filters and removes thallus, adds some solvents as sodium chloride and alcohol into supernatant to deposit polysialic acid, dissolves the polysialic acid deposits via deionized water, filters to remove modified protein, uses alkali prolease to treat filtrate, complexes deposits via cetyl pyridinium chloride or cetyltrimethylammonium bromide, and dissociates, uses over alcohol to deposit polysialic acid, dissolves the deposits via ultra-pure water, grades and purifies via chromatography column, collects and dialyzes eluent, cools and dries to obtain polysialic acid.

本發(fā)明以一株產(chǎn)聚唾液酸大腸桿菌的發(fā)酵液為原料，經(jīng)過過濾去除菌體91POPNY老北熟女，上清液加入適量氯化鈉和乙醇等溶劑沉淀出聚唾液酸男女一级黄色视频，聚唾液酸沉淀用去離子水溶解，再用過濾去除變性蛋白質(zhì)九九色影院亚洲欧洲，濾液經(jīng)過堿性蛋白酶處理欧美性高潮xxxx、氯代十六烷基吡啶或十六烷基三甲基溴化銨絡(luò)合沉淀并解離后，再用過量乙醇沉淀出聚唾液酸亚洲中文久久精品无码性色av，聚唾液酸沉淀用超純水溶解免费视频黄A片，用層析柱進(jìn)行分級純化，收集洗脫液經(jīng)過透析自拍偷拍第九页，冷凍干燥得聚唾液酸產(chǎn)品av东京热黄片。

It is dissolved in water with no need to apply temperature, though with heat it dissolves faster.

它溶解在水中，不需要申請溫度熟妇人妻激情系列，但它與熱溶解速度更快淫秽视频网站在线观看。

With the increasing of the dissolving temperature of the dopes, the diameter of the globules becomes larger.

綜合鑄膜液的溶解溫度對膜性能的影響，鑄膜液宜采用較低的溶解溫度(50-70℃)1024亚洲国产精品一区二区。

The enthalpies of solution of 〓人妻基地、〓、〓 and 〓 in HCl have been determined by micro-calorimeter.

利用微熱量計(jì)測定了合成的〓甜蜜蜜手机在线观看、〓欧美又大又粗性视频、〓和〓等4種水合硼氧酸鹽分別溶解于HCl水溶液中的摩爾溶解焓。

The organism cleared the dust by means of dissolution, enwrapping, winding or in the way of biochemical dissolution, and the fibre became shortened, broken, bifurcated, ends-rounded, and also it could dissolve, transfer and chemically react on surface.

機(jī)體以吞噬亚洲特a级黄片、包裹禁止18随进入的网站、纏繞，或以生化溶解方式排解粉塵黄色av免费在线播放，纖維自身則出現(xiàn)變短亚洲精品自拍AV在线日韩、尖部圓化、折斷影音先锋高清无码、分叉現(xiàn)象国产黄色视频流畅在线免费，也可以溶解日韩欧美中文字幕永久、遷移、表面化學(xué)反應(yīng)等古装一级婬片A片AAA毛片。

Hemolysis was evaluated in vitro through measuring erythrocyte lyses and ferrohemoglobin freeing degree with indirect contact method.

采用溶血試驗(yàn)檢查材料對血液紅細(xì)胞的溶解作用日本黄色官网，測定紅細(xì)胞溶解和血紅蛋白游離的程度。

In the NH_3 controlling region, the surface of Ni will be passivated rathereasily with the formation of oxide film.

在NH_3控制區(qū)Ni表面易鈍化生成氧化膜无码秒播成人网站免费，并停止溶解无码在线网址；在氧控制區(qū)，Ni的溶解速度為氧在液膜中的擴(kuò)散所控制国产黄色视频在线观看高清，可由氧傳遞速度方程來表達(dá)。

When the underground water percolates through a soluble rock sequence along its fissure it will dissolve large amount of calcium carbonates and seep out from the sidewalls and the roof. Due to the changes in temperature and pressure, water evaporated and carbon dioxide escaped and the dissolved calcium carbonate in the water precipitated in various forms.

地下水沿著可溶性巖石和裂隙滲透人人澡人摸人人添av，溶解了巖石中的較多的碳酸鈣911亚洲精品国内自产麻豆，通過洞頂或洞壁滴流出來，因?yàn)闇囟纫磺凇毫Φ母淖兂鲈谙咭苟∠悖恼舭l(fā)，二氧化碳散失亚洲精品在线观看视频免费，使溶解在水中的碳酸鈣沉淀下來形成各種形態(tài)欧美熟妇xXXⅹⅹ欧美老妇A片。

The results show that the dissolution process of prefabricating alloy can be divided into two periods when the temperature of zinc melt is below the melting point of aluminum.Firstly,zinc melts infiltrates into the prefabricating alloy and then Zn-Al-TiC alloy forms in the surface layer of the prefabricating alloy.Secondly,the Zn-Al-TiC alloy of this alloy surface layer begins to dissolve to the zinc melt.

結(jié)果表明：當(dāng)鋅熔體溫度低于鋁熔點(diǎn)時(shí)，預(yù)制合金的溶解可分為兩個(gè)階段：第一階段為液態(tài)鋅向預(yù)制合金中浸滲98国产视频，并在預(yù)制合金表層內(nèi)形成Zn-Al-TiC合金欧美激情性A片在线观看人妖；第二階段為預(yù)制合金表層內(nèi)的Zn-Al-TiC合金開始溶解并進(jìn)入鋅熔體。

The dissolution of pyrite in acidic solution was relatively fast and easily ranched to dissolution equilibrium.

黃鐵礦在酸性溶液中溶解速率相對較快亚洲黄色a片，并且容易達(dá)到溶解平衡男女肏穴网。