反应素

The feasibility of determining the pentosan in pre-extraction liquor from eucalyptus chips by using Douglas colorimetric method was discussed in this paper. The visible spectrums of xylose, glucose, mannose, galactose and kraft lignin were compared under the same color reaction conditions. The results showed that the disturbance from hexoses and lignin can be eliminated when the pentosan is identified and determined by the maximal absorption at 553nm.

摘 要：探讨了 Douglas 比色法用于测定桉木半纤维素预提取液中戊聚糖的可行性，通过对木糖、葡萄糖、甘露糖、半乳糖和木素在相同条件下显色反应后的谱图进行比较，证明利用553 nm 处的最大吸收进行测定可以排除己糖和木素的干扰。

Firstly, without the participation of L-Cys, urokinase can also hydrolyse plasminogen to generate angiostatin.

第一，我们的实验结果表明尿激酶酶切纤溶酶原获得血管抑素这一反应过程无需FSD参与，至少可以确认FSD不是血管抑素生成的必备条件。

Part II: The structural modification of norcantharidin and the discovery and applications of NCS-DMSO combinatorial system: A series of derivatives of 5,6-dehydronorcantharidin was transferred into their corresponding 5,6-epoxynorcantharidin derivatives with Oxone, and finally 14 new compounds have been synthesized; and we also discover the novel combinatorial system NCS-DMSO to make N-aromatic substituted norcantharidin amic acids to their corresponding imides in high yields.

利用十分廉价的Oxone为氧化剂，成功的得到了14个5，6-环氧去甲斑蝥素系列衍生物；同时我们意外地发现了NCS-DMSO组合体系可以使去氢去甲斑蝥素酰胺类化合物实现分子内脱水而生成亚胺类化合物，首次发现和运用该全新的组合体系实现了该类反应。

METHODS Upon the model of cultured rat FBs, C a2+ influx stimulated with Ang Ⅱ,CaN signaling pathway was blocked with c yclosporine Aand Ca2+ channel with verapamil, detecting the ac tivities of FBs CaN, mitogen activated protein kinase and protein kinas e C,［3H］-leucine(［3H］-Leu) and ［3H］-thymidine(［3H］-Td R) incorporation as the target to evaluate FBs proliferation.

方法以培养的FBs为模型，用Ang Ⅱ剌激FBs外Ca2+入流，环孢素A阻断CaN信号通路，维拉帕米阻断FBs钙通道，检测FBs CaN、丝裂素活化蛋白激酶、蛋白激酶C活性，用［3H］-亮氨酸及［3H］-胸腺嘧啶参入量作为反应FB s增殖的指标。

3 Carotenoids were identified by chromogenic reaction, thin-layer chromatography ,and spectroaanalysis,and were compared with maize yellow pigment and β.

从小米中提得天然食用黄色素，通过显色反应、薄层层析和光谱分析，并与玉米黄色素和β—胡萝卜素标准品相对照，确定其主要化学成分为类胡萝卜素，可能有：玉米黄素(3，3′—二羟基—β—胡萝卜素)，隐黄素(3—羟基—β—胡萝卜素)和叶黄素(3，3′—二羟基—α—胡萝卜素)等。

Through research and analysis of data, it was observed that the length and width of bark fiber varied according to the lop and age, the results show the fiber of the Salix bark is longer than the Salix and width of fiber almost same, fiber length of the Salix bark mainly influenced by the times of lop. The ash in Salix bark,1% Sodium Hydroxide Solubility in Salix bark, water solubility in Salix bark, Ethanol-Toluene in Salix bark, acid-insoluble lignin in Salix bark changed with the lop and age is also been investigated, the component of Salix bark is higher than Salix except acid-insoluble lignin,and it's high effected by times of lop; the TG analysis and DSC analysis is been used on the Salix bark and Salix to study the character of the hot-action, and the rang of the pyrogenate temperature is confirm; the quantity of Salix bark effect on the MOR, MOE, swelling in 24h water, nail withdraw and inner strength was determined, the results show that the Salix bark notability effect on the properties of board and dropped it; the properties of the Salix bark board is nearly the board product by other bark residues, it was established the multi regression equation of each properties and optimized the fitting produce condition of Salix bark board.

通过试验和数据处理，得出了沙柳树皮纤维长度、宽度随平茬和材龄的变化规律，结果表明沙柳树皮长度要比沙柳材的要长，宽度基本相同，沙柳树皮纤维长度主要受平茬次数的影响；找出了沙柳树皮中灰分、冷热水抽出物为、1%NaOH抽出物为，甲苯乙醇抽出物、酸不溶木素与平茬次数和材龄之间的关系，除酸不溶木素外，其他成分均明显高于沙柳材，沙柳树皮的化学成分主要受平茬次数的影响；利用TG和DSC法分析了沙柳树皮和沙柳材的反应热特征，确定了热解的温度范围；研究了沙柳树皮量对于刨花板MOR、MOE、吸水厚度膨胀率、握钉力以及内结合强度的影响，结果证明沙柳树皮量对于刨花板的各项性能指标影响显著，它的掺入降低了刨花板的各项性能；对沙柳树皮板的研究表明，沙柳树皮板的各项性能与同类树皮板的性能基本相近，建立的二次回归模型稳定，并利用回归方程求出了适宜的沙柳树皮板制造工艺。

Response of elements deficiency stress in Rosa roxburghii Tratt was studied.

刺梨对缺素胁迫的反应樊卫国，刘进平（贵州农学院园艺系贵阳550025）摘要研究结果表明，在缺素胁迫下。

Barley Grass Fiber contains pineapple enzyme and enzymes sourced from the barley grass powder.Enzymes are the catalysts for the body's essential chemical reactions and are responsible for our digestive processes that provides cellular energy and for antioxidant effects that offers a natural therapy for rejuvenation with cell protection against free radical.

大麦纤维素富含的菠萝酵素及其他源自大麦草粉酵素是消化过程的是消化反应主要的催化剂，它负责将人体消化过程中输送转化成的能量至细胞组织，促形成保护免受自由基对细胞氧化的作用，提供了人体美颜抗老的自然疗法。

Our results revealed that TGF-β1 at 1 ng/ml induced collagen deposition of HSC-T6 cells (145 ± 5 % of controls), and pre-exposure of cells to curcumin (1.25~10 μM) inhibited the stimulatory effect of TGF-β1 in a concentration-dependent manner. Curcumin (10 μM) significantly reduced the TGF-β1-induced collagen deposition (97 ± 7 % of controls) without cytotoxicity in the MTT assay .

我们的结果显示，1 ng/ml 浓度的TGF-β1可以有效地增加星状细胞对胶原蛋白的制造(达控制组的145 ± 5 %)，而在预先投予浓度范围为1.25~10 μM的姜黄素后可对TGF-β1引起的刺激反应产生浓度效应的抑制作用；姜黄素在浓度10 μM下可明显地抑制TGF-β1引起的胶原蛋白沉积(达控制组的97 ± 7 %)而不致产生细胞毒性。

State Key Lab of Pulp and Paper Engineering,South China University of Technology,Guangzhou,Guangdong Province,510640) The fcasibility of determining the pentosan in pre-extraction liquor from eucalyptus chips by using Douglas colorimetric method was discussed in this paper.

探讨了Douglas 比色法用于测定桉木半纤维素预提取液中戊聚糖的可行性，通过对木糖、葡萄糖、甘露糖、半乳糖和木素在相同条件下显色反应后的谱图进行比较，证明利用553 nm处的最大吸收进行测定可以排除己糖和木素的干扰。

This one mode pays close attention to network credence foundation of the businessman very much.

这一模式非常关注商人的网络信用基础。

Cell morphology of bacterial ghost of Pasteurella multocida was observed by scanning electron microscopy and inactivation ratio was estimated by CFU analysi.

扫描电镜观察多杀性巴氏杆菌细菌幽灵和菌落形成单位评价遗传灭活率。