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SO〓 injury caused a reduction of water, chlorophyll and anthocyanidin, and pH values of the grapes injured by SO〓 were decreased and the intracellular acidification of flesh could be found. SO〓 injury also inhibited activities of SOD, POD and CAT, and deceased ASA contents. Hence the membrane lipid per oxidation was accelerated and the content of MDA and relative electrical conductivity were increased. Treatment of toxic dose of SO〓 increased respiratory rate, lowered activities of PAL and PPO.

与不耐SO〓的品种&红地球&相比,耐SO〓品种&巨峰&具有较高的pH值和较大的缓冲容量,较高的超氧化物歧化酶和苯丙氨酸解氨酶活性;受SO〓刺激后,耐SO〓品种&巨峰&的超氧化物歧化酶及苯丙氨酸解氨酶活性和酚类物质含量上升幅度大于不耐SO〓的品种&红地球&;长期处于SO〓伤害环境时,耐SO〓品种&巨峰&的过氧化氢化酶活性下降幅度低于不耐SO〓的品种&红地球&。

The structural and photocatalytic properties of TiO〓 as well as surface acidity were greatly improved by sulfation. SO〓〓/TiO〓 solid superacid with Hammett constant Ho less than -12.14 was prepared by treating the TiO〓 with 1.0mol. L〓 sulfuric acid solution and then calcining at 450℃ for 3h. When compared to unmodified TiO〓, the SO〓〓/TiO〓 superacid catalyst exhibited higher anatase content, smaller crystal size, higher specific surface area, centralized pore size distribution, and the blue-shifted band edge of uv-vis adsorption spectra. Furthermore, the SO〓〓/TiO〓 superacid also showed excellent reaction activity and stability for CH〓Br photocatalytic decomposition even under the moist reaction conditions. The apparent quantum efficiency of SO〓〓/TiO〓 was 10 times of that of TiO〓 catalyst for the photocatalytic degradation of bromomethane. Therefore, the SO〓〓/TiO〓 superacid catalyst is promising for practical application in environmental remediation.It was found that both L and B acid sites exist on SO〓〓/TiO〓 photocatalyst while only L acid sites on TiO〓 photocatalyst. On the basis of experimental results, the synergistic model of superacidic centers was proposed for SO〓〓/TiO〓 photocatalyst to explain the photocatalytic behavior and the mechanism of superacidifing effects, assuming that the adjacent L and B acid sites induced by SO〓〓 comprise cooperatively the superacidic center on superacid photocatalyst. The group cooperation of the superacidic center could strengthen the surface acidity, increase surface acid sites and the adsorbtion of O〓, promote separation of photogenerated electron-hole pair, enhance the interfacial transfer of charges and reversibility of water adsorption. Consequently the excellent photocatalytic activity, reaction stability and resistibility to humidity of SO〓〓/TiO〓 superacid photocatalyst may attributed to the group cooperated effect of the superacidic center on the photocatalyst.

研究结果表明:SO〓〓与TiO〓表面的结合为螯合式双配位结构;TiO〓光催化剂表面经H〓SO〓浸渍处理后,提高了表面酸性,改善了催化剂结构和光催化性能,当H〓SO〓浸渍浓度为1.0mol.L〓、烧结温度为450℃时,可制得SO〓〓/TiO〓超强酸催化剂(H〓<-12.14),其结构和光催化活性得到明显改善,与TiO〓相比,SO〓〓/TiO〓光催化剂的锐钛矿含量高、晶粒小、BET比表面积大、孔径分布集中、光谱吸收边蓝移,具有优异的光催化氧化活性、稳定性及抗湿性能,光催化降解溴代甲烷的表观量子效率比TiO〓催化剂提高了一个数量级,是一种有实际应用前景的高效光催化剂;由此提出了SO〓〓/TiO〓超强酸催化剂表面集团协同作用的超强酸中心模型,认为在SO〓〓/TiO〓超强酸催化剂表面,由SO〓〓诱导的相邻L酸中心和B酸中心组成了集团协同作用的超强酸中心,其集团协同作用显著地增强了催化剂表面酸性、增大了表面酸量及O〓吸附量、促进了光生电子和空穴的分离及界面电荷转移,具有可逆吸附水的性能,是SO〓〓/TiO〓超强酸催化剂具有优异的光催化氧化活性、很好的活性稳定性及抗湿性能的重要原因。

The apparent quantum efficiency of SO〓〓/TiO〓 was 10 times of that of TiO〓 catalyst for the photocatalytic degradation of bromomethane. Therefore, the SO〓〓/TiO〓 superacid catalyst is promising for practical application in environmental remediation.It was found that both L and B acid sites exist on SO〓〓/TiO〓 photocatalyst while only L acid sites on TiO〓 photocatalyst. On the basis of experimental results, the synergistic model of superacidic centers was proposed for SO〓〓/TiO〓 photocatalyst to explain the photocatalytic behavior and the mechanism of superacidifing effects, assuming that the adjacent L and B acid sites induced by SO〓〓 comprise cooperatively the superacidic center on superacid photocatalyst. The group cooperation of the superacidic center could strengthen the surface acidity, increase surface acid sites and the adsorbtion of O〓, promote separation of photogenerated electron-hole pair, enhance the interfacial transfer of charges and reversibility of water adsorption. Consequently the excellent photocatalytic activity, reaction stability and resistibility to humidity of SO〓〓/TiO〓 superacid photocatalyst may attributed to the group cooperated effect of the superacidic center on the photocatalyst.

研究结果表明:SO〓〓与TiO〓表面的结合为螯合式双配位结构;TiO〓光催化剂表面经H〓SO〓浸渍处理后,提高了表面酸性,改善了催化剂结构和光催化性能,当H〓SO〓浸渍浓度为1.0mol.L〓、烧结温度为450℃时,可制得SO〓〓/TiO〓超强酸催化剂(H〓<-12.14),其结构和光催化活性得到明显改善,与TiO〓相比,SO〓〓/TiO〓光催化剂的锐钛矿含量高、晶粒小、BET比表面积大、孔径分布集中、光谱吸收边蓝移,具有优异的光催化氧化活性、稳定性及抗湿性能,光催化降解溴代甲烷的表观量子效率比TiO〓催化剂提高了一个数量级,是一种有实际应用前景的高效光催化剂;由此提出了SO〓〓/TiO〓超强酸催化剂表面集团协同作用的超强酸中心模型,认为在SO〓〓/TiO〓超强酸催化剂表面,由SO〓〓诱导的相邻L酸中心和B酸中心组成了集团协同作用的超强酸中心,其集团协同作用显著地增强了催化剂表面酸性、增大了表面酸量及O〓吸附量、促进了光生电子和空穴的分离及界面电荷转移,具有可逆吸附水的性能,是SO〓〓/TiO〓超强酸催化剂具有优异的光催化氧化活性、很好的活性稳定性及抗湿性能的重要原因。

Function description: The product, made with the micro-emulsification technology, and based on the novel principle of blocking the formation of melanin, with the function of super active pure laevorotatory Vitamin C, can renew the skin crystalline and bright.

产品功效:采用独特的微乳化技术及截击黑色素形成的最新原理,配合超活性精纯左旋VC,令肌肤重拾晶莹亮泽。

It's founded that Pistia stratiotes' soluble protein content,proline,peroxidase and catalase increased first and decreased afterwards with the augmenting of Cd2+ and Cr6+ concentration in the solution;With Cd2+ and Cr6+ concentration augmenting,SOD activity of Pistia Stratiotes increased first and decreased afterwards;But with Cd2+ Concentration augmenting, SOD Activity of Myriophyllum spicatum increased first and decreased afterwards; with Cr6+ concentration augmenting,SOD activity Myriophyllum spicatum droped at all times.

结果表明:随着水体Cd2+和Cr6+浓度的增加,大薸和穗状狐尾藻的可溶性蛋白含量、脯氨酸、叶绿素、丙二醛含量、硝酸还原酶活性、过氧化物酶活性、过氧化氢酶活性都是先升高后降低;随着Cd2+和Cr6+浓度的增加大薸超氧化物歧化酶活性先升后降;而穗状狐尾藻随着Cd2+浓度的增加SOD活性先升后降,随着Cr6+浓度的增加,SOD活性直线下降。

We also studied their inhibition on H2O2,UV-induced hemolysis of RBC. Sodium paeonol sulfonate was used as keep-freshing agent in tomato storage and vitamin C content, brix, acidity, weight loss, membrane permeability, soluble protein content, SOD andPOD activity was determined. The results were as follows: Paeonol and sodiumpaeonol sulfonate had remarkably inhibitory effects on Xanthmonas oryzaepv.oryzicda,Pseudomonas solanacearum Smith, Phyllosticta mali Pril.et Delac.and Rhizoctonia solani Kuhn.

在生物学活性方面,检测了丹皮酚及丹皮酚磺酸钠对植物病原菌的抑制作用,测定了其清除超氧阴离子自由基(O_2~-)、羟自由基的活性及对过氧化氢(H_2O_2)和紫外线诱导红细胞溶血的影响,并用丹皮酚磺酸钠对樱桃番茄进行了保鲜研究,测定贮藏期间番茄的维生素C含量、糖度、酸度、失重率、膜透性、可溶性蛋白含量、超氧化物歧化物及过氧化物活性等。

The results of the physiological and biochemical indexes in callus tissue of Poncirus trifoliata tested under calcium carbonate(CaCO3) stress indicated that except total iron content, the negative correlations among CaCO3 concentration and peroxidase activity, superoxide dismutase activity, catalase activity, active iron content, soluble protein content and callus growth were recorded.

提要测定碳酸钙(CaCO3)胁迫下枳壳愈伤组织的某些生理生化指标的结果表明:除全 Fe 含量外,CaCO3浓度与过氧化物酶活性、超氧化物歧化酶活性、过氧化氢酶活性、活性Fe含量、可溶性蛋白质含量、愈伤组织增重均呈显著或极显著负相关,与培养液pH值呈显著正相关;随着培养的进程, POD活性、活性Fe和可溶性蛋白质含量、愈伤组织增重呈降低趋势, SOD和CAT活性先升后降,含高浓度CaCO3的培养液 pH值仅在20日左右略有降低。

The activty of SOD in vesicle solution is then determined. But still no apparent superactivty is found due to the following reasons: 1. The lowered dielectric constant reduces not only the self-oxidation rate of pyrogallic, but also the activity of SOD; 2. There are no efficient enough interaction between vesicles and SOD.

在上述体系中进行的SOD的活性研究中,没有发现表观超活性,估计是两方面的原因:一是囊泡周围低的介电常数同样也降低了SOD酶的活性,二是由于表面活性剂浓度较小,仅为0.5%左右,使得囊泡体积分数较小,不能与SOD酶发生充分有效的结合。

Fourthly, the expression system containing P〓 promoter and phoA signal peptide was used to express superactive glucagon,-glucagon (SA-glucagon).

四 此外,采用上述体系表达了胰高血糖素的高效激动剂—超活性胰高血糖素。

Contrasted with the activity of the same reaction in oil-water double phased system, the hydrolyzing behavior of Camlicla Lipolytica Lipase in reversed micellar systems is much like that in oil-water double phased system. The stability and catalyzing activity are both enhanced and give rise to "superactivity". except in reverse micelles composed of cationic surfactant.

实验表明,脂肪酶CLL在反胶束体系中催化水解反应的行为与油-水双相体系中的行为大体相似,在阴离子和非离子型表面活性剂构建的反胶束中,酶的稳定性和催化活性都有所增加,呈现&超活性&。

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