底木

Suitable substrates were the key factors for xylanases production. XylanaseB was produced mainly when corn starch or beechwood xylan was used as the inducing substrate.

发酵底物是产生木聚糖酶的重要影响因素，在以玉米淀粉或山毛榉木聚糖为底物时，产生的木聚糖酶主要是木聚糖酶B，而以廉价的麦麸为底物则主要产生木聚糖酶G和B。

A maximum xylanase activity of 3, 030 U/mL was obtained from cell extract against birchwood xylan. The recombinant XT6 was partly characterized and was similar with those of the native enzyme in G.

重组表达的木聚糖内切酶XT6特性和天然酶相似，以桦木木聚糖为底物测定细胞提取物中木聚糖酶活性，最大活性高达3030U/mL。

Chemical modification of the xylanase with NBS and WRK revealed that trytophan and glutamate/aspartate were essential for the activity. 3.0 mgmL^(-1) birchwood xylan could completely inhibit the inactivation of xylanase by NBS.

木聚糖对NBS的修饰有抑制作用，3.0mgmL^(-1)的桦木木聚糖底物可完全阻止NBS对耐热木聚糖酶的修饰作用，但木聚糖底物不能阻止WRK对耐热木聚糖酶的失活作用。

No xylanase activity was found when the culture was carried out without xylan in the medium or with the saccharose as the only carbon source in the medium. Xylose inhibited the xylanase production.

发酵培养基中不含木聚糖时，米曲霉RIB128不产生木聚糖酶，蔗糖为底物时也不产生木聚糖酶，葡萄糖可以诱导产生少量木聚糖酶，木糖则抑制木聚糖酶的产生。

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The sill of a window (the horizontal member at the bottom of the window frame).

窗户的底木。

Wood species:full okoume,full poplar , okoume face/back poplar core, agathis face/back poplar core, birch face/back poplar core,pine face/back poplar core,obeache face/back poplar core and firepoof

树种：全奥古曼；全杨木；奥古曼面底，杨木芯；贝壳杉面底，杨木芯；桦木面底，杨木芯；松木面底，杨木芯；大白木面底，杨木芯和防火板

Hydrolysis of xylans from Oat spelt, Birch wood and Beech wood by purified xylanase A was studied. The result showed there is difference of the process of hydrolysis of different xylan.

10WL-11木聚糖酶A对来源于燕麦、桦木和榉木的可溶性木聚糖的酶解结果发现，酶A对几种不同来源的木聚糖的降解过程并不一致，即对不同的木聚糖底物的作用方式存在差异。

Most commonly, this insoluble form of staining arises from line leached out of concrete elements such as sills, lintels, copings, or cement rendered areas.

一般地，这些不溶性物质是从混凝土中过滤而来，包括底木、眉石、遮檐或水泥。

The hydrolysates from oat xylan using Xyn Ⅰ Xyn Ⅱ and their mixture for hydrolysis were analysed by HPLC. It was showed that Xyn Ⅰ hydrolyzed mainly the unsubstituted regions of oat xylan, and hydrolytes were high xylooligosaccharides; whereas Xyn Ⅱ exhibited greater catalytic versatility than Xyn Ⅰ and were able to attack substituted regions of the polysaccharide and showed greater activity to low xylooligosaccharides than Xyn Ⅰ to give xylobiose as the main hydrolysate. The purified xylanases were acidic enzymes.

以纯化酶组分及其混合物水解燕麦木聚糖，采用高效液相色谱分析相应的水解产物，结果表明，Xyn Ⅰ降解燕麦木聚糖时，主要降解作用发生在底物中没有取代基的区域，水解产物的聚合度较高；Xyn Ⅱ对底物具有更强的适应性，能降解底物中有取代基的区域，相对Xyn Ⅰ酶组分，Xyn Ⅱ酶组分对低聚合度的木聚糖的活性更高，木二糖为主要降解产物。

However, as the name（read－only memory）implies, CD disks cannot be written onorchanged in any way.

然而，正如其名字所指出的那样，CD盘不能写，也不能用任何方式改变其内容。

Galvanizes steel pallet is mainly export which suits standard packing of European Union, the North America. galvanizes steel pallet is suitable to heavy rack. Pallet surface can design plate type, corrugated and the gap form, satisfies the different requirements.

镀锌钢托盘多用于出口，替代木托盘，免薰蒸，符合欧盟、北美各国对出口货物包装材料的法令要求；喷涂钢托盘适用于重载上货架之用，托盘表面根据需要制作成平板状、波纹状及间隔形式，满足不同的使用要求。