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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&。
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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。
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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。
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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。
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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。
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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。
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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。
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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。
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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。
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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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bactericidal activity:杀菌活性
文章摘要:将9种细菌细胞成分及其代谢产物分别添加入饵料投喂鲫鱼,连续投喂35d,每隔7d检测鲫鱼白细胞吞噬活性(phagocytic activity)、吞噬细胞杀菌活性(bactericidal activity)、超氧化物歧化酶(Superoxide dismutase,
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hyperfine interaction:超精细相互作用
activated sludge tank 活性污泥槽 | hyperfine interaction 超精细相互作用 | strudel 以果实或干酪为馅而烤成的点心
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hypersensitive site:超敏感位点
仔细分析具有转录活性基因周围的DNA区域,表明有一个中心区域存在,称为超敏感区域(hypersensitive region)或超敏感位点(hypersensitive site),它对DNaseⅠ是高敏感的.
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Immediate hypersensitivity:速发型超敏反应
Ⅰ型变态反应又称男科过敏反应(anaphylaxis),因反应迅速,故又有速发型超敏反应(immediate hypersensitivity)之称. 本型变态反应是通过抗原(致敏原)进入机体后与附着在肥大细胞孩子和嗜碱性粒细胞孩子上的IgE分子结合,并触发该细胞孩子释放生物活性物质,
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inactive:不活性
所谓不活性(inactive)的肾结石,就是指虽然有肾结石,但是没有感染,没有阻塞,没有症状的发生.有这种不活性肾结石的患者,最好定期每3-6个月实施检查,因为肾结石有可能突然阻塞而造成危险.也就是说发现肾结石了,但是不实施开刀取出或超音波震碎排出,
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SOD:超氧化物歧化酶
经>研究显示,不含"超氧化物歧化酶"(SOD) 的"SDTL® Miracle" 干细胞前体因子经皮外用能快速跨越细胞膜,并能在20秒内能到达红细胞等组织内,调整血液pH值,促进氧与血红蛋白的结合能力、减少活性自由基及减少细胞氧化速度,
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SOD:超 氧 岐 化 酶
对小鼠亚急性衰老模型影响的实验结果表明,与模型组比较,沙棘叶总酮大、小剂量组(分别为32.1mg/kg.d^(-1)、10.7mg/kg.d^(-1)小鼠脑单胺氧化酶(MAO-B)活性均明显下降;其肝脏肝脂褐质(LF)含量明显降低,丙二醛(MDA)含量亦有降低趋势,超氧岐化酶(SOD)活性无明显变化;沙
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superaddition:附加物,添加物
superactivity 超活性 | superaddition 附加物,添加物 | superadditivity 超加和性,超加性
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superactivity:超活性
superacidity 过度酸性 | superactivity 超活性 | superaddition 外加
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activated sludge tank:活性污泥槽
transamidation 转酰氨基作用 | activated sludge tank 活性污泥槽 | hyperfine interaction 超精细相互作用