柱状蒙脱石对环境污染物的吸附研究

Both inorganic and organic pillared montmorillonites were used to adsorb phenol.Batch kinetics and isoterm studies were carried out to evaluate the effect of equilibrium time and pH on adsorption of phenol by montmorillonites and re-adsorbing characteristics of pillared montmorillonites.The adsorption of phenol increased with increasing solution pH values.The elimination ratio of phenol from the solution by the absorption of organic modified pillared montmorillonte(OrPMt），reached equilibrium quickly after vi-brating for 5miuntes ,Meanwhile for organic montmorillonte(OrPMt),pillared montmorillonite(PMt) and montmorillonite(Mt),the time of reach phenol-absortion equilibrium were 20,30 and 90 minutes ,respectively,The adsorbing capacity of the pillaed montmorillonite modified with surfactant improved greatly. The phenol-adsorbing capacity of pillared montmorillonites mailnly depended on microporous struchure and surface component of the modified clays. Ater calcination at 500℃,the pillar structure and the basal spacing (1.83nm)were still stable .So the pillared montmorillonite could be recycled,and it was a potential material for adsorbing environmental pollutants.     

Electrochemical Oxidation of Aqueous Phenol at Carbon Nanotube Electrode

To investigate the effects of human soluble TRAIL(sTRAIL) on cell growth and apoptosis of hepatocellular carThe electrochemical oxidation of aqueous phenol at pure carbon nanotube electrode has been studied by cyclic voltammetry.The results have shown that in the potential region of water stability,fine oxidation current curve can be obtained.The electricity of oxidation peak is partly linear with phenol concentration.Comparing with traditional carbon electrode,better results have been obtained with the pure carbon nanotube electrode.Depending on it,it is possible to obtain the complete combustion of phenol to CO_2,which can avoid electrode fouling and poor repeatability.     

Grapevine selection for improving nutrient content and composition and the associated quality indices—a review

Genotype selection is an essential step in breeding programs determining nutrient content and composition and, thereby, the quality indices of grapevines and their products. The grapevine bioactive compounds, particularly flavonoids, are determinants of grape quality and possess strong health-promoting effects in grapevine and humans. Grapevine nutrient content and composition depends on genotype–environmental interaction in which genotype selection and stress conditions, particularly severity, time, and combination of stresses play significant roles in determining grape and wine quality. This review article aims to provide information required for appropriate genotype selection of grapevines for production of high-quality fruits. The influence of interacting factors, including genotype selection, grapevine metabolites, and environmental conditions, and their interrelationships on the quality of grapevines (flavor, aroma, pigmentation, color stability, and stress tolerance of red and white grapes) and their products (organoleptic properties and storage life of wine/must and juice) are discussed.     

铜处理对大白菜芝麻状斑点病发生及总酚含量的影响

选择感病品系03B9 与抗病品系C24 为试材,在水培条件下,研究不同铜浓度处理对大白菜芝麻状斑点病发生、总
酚含量及多酚氧化酶活性的影响。结果表明：随着铜处理浓度的升高,两品系芝麻状斑点病的斑点数明显增加,03B9 芝麻
状斑点病发生程度明显高于C24。铜处理期间C24 总酚含量、PPO 活性较03B9 平均高出25.6% 和77.0%。试验结果初步表
明,水培条件下铜胁迫促进了大白菜芝麻状斑点病的发生,铜浓度与芝麻状斑点病发生程度有关,同时影响了叶柄总酚含量
及PPO 活性。     

靛酚蓝比色法测定植物全氮含量方法的改进

改进苯酚测定植物全氮含量的方法。验证结果表明：溶液中的铵盐与显色液反应后,在690 nm附近有最大吸收峰,在0～300 mg/L的氮浓度ρN范围内,吸光度A690与ρN成正比,其相关系数R2＝0.998 2,所形成的颜色稳定长达6 h,干扰元素少;样品测定精密度在2%以内,加标回收率在97%～100%。改进后,待测液中氮浓度的测定范围提高了3倍,且不需调整pH值,并建立了测定植物全氮含量的相应方法。     

农田灌溉水中挥发酚的流动分析-分光光度分析法的建立

主要通过使用流动分析仪对农田灌溉水中的挥发酚进行测定,有效地提高了检测的精密度与准确度。相比传统分光光度计检测法,此法更方便和快捷,大大降低了样品的使用量,节省了人力物力,较好地满足了批量样品测定的要求,值得大力推广和应用。     

Effect of Zinc Application on Growth and Some Biochemical Characteristics of Costmary (Chrysanthemum balsamita L.)

A pot experiment was conducted to investigate the effects of different zinc (Zn) application methods (soil and foliar application) and concentrations (1 and 2 mg kg^?1 in soil application and 1 and 3 g L^?1 in foliar application) on the growth, some biochemical characteristics, and nutrient concentrations of costmary (Chrysanthemum balsamita L.). Growth parameters were increased by zinc application regardless of its concentration and application method. Protein and total phenol content, antioxidant capacity, and chlorophyll index were increased by zinc supply. In contrast, proline and soluble sugars content showed a decreasing pattern with zinc application. Zinc application, either through soil or foliar application, increased the zinc content of shoots. Manganese uptake potential of plants was increased by foliar zinc application method but not by soil application of zinc. Zinc application had no significant effect on potassium content of plants.     

木瓜秀粉蚧为害对不同木薯品种次生代谢物质含量的影响

次生代谢物质在植物防御植食性害虫时发挥重要作用,但目前尚无次生代谢物质与木薯品种抗虫相关性的报道。本研究系统开展了木瓜秀粉蚧为害前后不同木薯品种叶组织中总酚、丙二醛、单宁等次生代谢物质含量的差异分析。结果表明,与为害前相比,木瓜秀粉蚧为害1、4、8 d后,感虫木薯品种‘BRA900’‘面包’‘SC205’和‘瑞士T7’叶组织中总酚与丙二醛含量无显著差异,单宁含量则显著降低,而抗虫木薯品种‘缅甸’和‘C1115’叶组织中总酚和单宁含量显著增加,丙二醛含量显著降低。抗虫木薯品种的总酚含量在粉蚧为害前显著低于感虫木薯品种,而粉蚧为害1、4、8 d后显著高于感虫木薯品种;抗虫木薯品种丙二醛含量在为害前与感虫木薯品种无显著差异,粉蚧为害1、4、8 d后显著低于感虫木薯品种;抗虫木薯品种单宁含量在为害前后均显著高于感虫木薯品种。相关性分析发现,木薯对木瓜秀粉蚧的抗性与叶组织中总酚含量和单宁含量显著正相关,与丙二醛含量显著负相关。本研究初步阐明基于次生代谢物质总酚、丙二醛、单宁的木薯品种对木瓜秀粉蚧的抗性机理。     

苯酚对土壤中微生物数量及酶活性的影响

研究了苯酚对土壤中微生物数量及蛋白酶和脲酶活性的影响.结果表明,苯酚对细菌的影响表现为先抑制后刺激,苯酚抑制放线菌生长但刺激真菌生长;不同质量分数的苯酚对蛋白酶活性影响不同;苯酚抑制脲酶活性,且抑制程度与处理苯酚的质量分数呈正相关,随着培养时间延长,抑制作用有所减弱.     

液化木质素磺酸钙基环保酚醛胶黏剂的合成

探讨了加料方式对传统酚醛树脂(PF)胶黏剂游离酚、醛的影响因素.在此基础上,采用热化学酚化技术活化木质素磺酸钙得到木质素磺酸钙酚化产物,将酚化产物代替苯酚制备低成本的木质素基酚醛胶黏剂(LPF).实验结果表明,当甲醛分3次加入、碱液分2次加入时,制备的PF胶黏剂具有较低的游离酚、醛,且以苯酚为液化试剂,液化温度140℃、液化时间15min、苯酚与木质素磺酸钙的质量比(酚木比)为2∶1,酚化工业木质素磺酸钙,将得到的酚化液代替苯酚在酚醛物质的量之比为1∶1.7时,制得的LPF具有更低的游离酚、醛含量、较长的储存期和优异的胶合性能.