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The research in adsorption and desorption of nitrogen and phosphate is crucial to application of fertilization and environmental pollution prevention.
研究土壤对氮、磷的吸附/解吸附特性对合理施肥、防止环境污染等有重要的作用。
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Electrokinetic transport process could promote effectively the desorption and migration of phenol and 2,4-dichlorophenol in soil; electromigration and electroosmosis were the main mechanisms; and the .
结果表明,电动力学过程能有效地促进土壤中苯酚及2,4-二氯酚的解吸附和迁移,电渗析和电迁移是其主要的作用机理,其迁移效果与电动力学形式、污染物类型、土壤酸碱性质和电极反应等密切相关,可以采用适当的电动力学工艺修复含酚类化合物的污染土壤。
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(1) In the sorption kinetics experiment, Cu2+ sorptions by Ceratophyllum demersum, Myriophyllum triphyllum and Hydrilla verticillata respectively, all reached balance within 35mins, all of the test results of sorption kinetics recommended the pseudo second-order equation and indicated that this kind of sorption was a complicated process of simultaneous actions of many reactions. The test results of thermodynamic sorption fitted with Langmuir model better than Freundlich model, and the maximum sorption quantites were 13.12, 20.12, 7.79mg/g, respectively,In the desorption test, the desorption rates of each plants were all below 1%, indicating strong sorption-holding action of these submersed mcrophytes on Cu2+.
通过上述研究,得到以下结论: 1、狐尾藻、金鱼藻、黑藻在对铜离子的吸附动力学实验中,均在35min内达到吸附平衡,分别用一级动力学方程和伪二级动力学方程拟合,结果均为用伪二级动力学方程拟合效果较好,表明该吸附为多种反应同时作用的复杂过程;在热力学实验中,三种植物的吸附曲线都能较好的用Langmuir曲线拟合,其拟合最大吸附量分别为13.12、20.12、7.79 mg/g;在解吸实验中,三种植物的解吸率都较低,说明对铜离子都有较好的吸持能力。
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The effect ofmagnesium trisilicate on absorbing tetracycline and its effect in the presence of somesurfactants and citric acid in vivo have also been studied by usng the data ofurinary excretion.
实验结果表明:三硅酸镁的吸附能力随介质 pH 的高低而增减。月桂醇硫酸钠和枸橼酸在体外对三硅酸镁有明显的解吸作用,而 Brij-35的解吸作用不明显。
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Stable coating and minimal false positives were achieved by conjugating LPS to poly-L-lysine, which solved the desorption problem.
试验中采用LPS与多聚赖氨酸的结合,解决了包被过程中的解吸附作用,增强了包被的稳定性,同时也减少了假阳性反应,优化了包被过程。
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The analyses of electronic structures shows that the catalytic reactivities for H2 adsorption of the different surfaces are dependent on the numbers of s orbital bonding electrons around Fermi level for the uppermost layer metal atoms which interact directly with H2. It is easy to form vacancy for hydrogen atoms next to iron atom, which indicates that hydrogen atom cannot be escaped, but it is difficult to from vacancy for hydrogen atoms next to magnesium atom, which indicates that hydrogen atom can be escaped. Hence it is thought that the change of dehydrogenating properties of MgH2 with or without a little iron addition attributes to the weakened bonding between magnesium and hydrogen.
分析电子结构发现:空位缺陷有助H2吸附于Mg表面,与Mg(0001)表面最上层与H2直接产生吸附作用的金属原子在费米能级附近s轨道的成键电子数密切相关;在Fe合金化MgH2体系中,与合金化元素Fe近邻的H原子形成空位的难度增加,H原子较难释放;与Mg近邻的H原子形成空位的难度减少,H原子容易释放;Fe合金化导致Mg-H之间存在较弱的成键作用,因此,MgH2体系的解氢性能得到提高。
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The SEM indicated that the absorbent pyrolyzed at 300℃ got a macropore structure and abroad sorption volume, and the oil could be rapidly absorbed by capillary action.
SEM观察表明,300℃热解物中大容量的孔结构和毛细管作用是其具有大的吸油容量和对油产生快速的吸附作用的主要原因。
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The concentration of phosphate can be located at 0.01~ 0.06mg/L by the sorption and desorption of sediments even if there are no wastewater discharge outfalls.
缓冲试验表明:即使上海市排放污水中不含磷,悬浮泥沙也可以通过吸附、解吸作用将长江口水相磷酸盐的浓度平衡在0.01~0.06mg/L附近,该值与长江口水域的实际监测结果非常吻合。
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The results indicated that a dependable kinetic model could be obtained by modifying the Temkin equation by considering the H2 and NH3 adsorption factors. Activation energy for the ammonia synthesis reaction was obtained as 90.2 kJmol^(-1) after linear fitting the kinetic and thermodynamic parameters k, K(subscript H2) and K(subscript NH3) with the Arrhenius and Van't Hoff equation, which was much lower than that over iron-based catalyst, which indicated that the activation energy barrier of N2 dissociative adsorption on Ru was far lower than that on either the conventional magnetite-based catalyst or wustite-based catalyst; the hydrogen adsorption heat was 76.2 kJ mol^(-1), indicating that the adsorption of hydrogen on the Ba-Ru-K/AC catalyst was so strong that it inhibitied the dissociative adsorption of nitrogen.
结果表明,在Temkin方程中加入H2和NH3的吸附项能够获得可靠的动力学模型,用Arrhenius和Van't Hoff方程对动力学和热力学参数k、K(下标 H2)和K(下标 NH3)进行线性拟合,得到氨合成反应的活化能为90.2 kJmol^(-1),远低于铁基催化剂,说明Ru上N2的解离吸附活化能垒远低于传统磁铁矿基催化剂和维氏体基催化剂。H2的吸附热为76.2 kJmol^(-1),证明Ba-Ru-K/AC催化剂上H2的吸附较强烈,对N2的吸附有强烈的抑制作用。
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The depressing ability of the macromolecule organic depressants can be improved by the increase of their D.S.. The high D.S. CPVA and CPEG show strong depressing ability to calcite, while CPEG indicates strong depressing ability to diaspore, and HPAM to pyrite.The depressing mechanism of organic depressants was confirmed by the measurements of zeta potential, contact angles, adsorption capacity and IR spectrum.
利用动电位、接触角、吸附量和红外光谱等测试方法和手段,探讨了抑制剂的作用机理:苯氧乙酸类小分子抑制剂与方解石之间可发生较强的化学作用,可以选择性地吸附在方解石表面,使捕收剂发生解吸或阻止捕收剂在矿物表面的吸附而使矿物受到抑制;大分子抑制剂则主要是依靠亲固基吸附在矿物表面,再利用其长链的强亲水性而使矿物受到抑制。
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Austin Wai:竹头塘!电子刺激解吸附作用!惠天赐
何华超 Tony Ho | 汪圆圆 Irene Wong .....Xiao Ying | 竹头塘!电子刺激解吸附作用!惠天赐 Austin Wai
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dissociation chemisorption:离解化学吸附作用
dissociate 离解 | dissociation chemisorption 离解化学吸附作用 | dissociation constant 电离常数
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desorption:解吸附作用
desooter 除碳垢剂 | desorption 解吸附作用 | desorption 解吸收作用
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dissociation constant:电离常数
dissociation chemisorption 离解化学吸附作用 | dissociation constant 电离常数 | dissociation degree 离解度
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alk:碱
有效成分:即药材中代表其功效的化学成分. 如左旋麻黄素(l-ephedrine)具有平喘、解痉作用,甘草酸(glycyrrhizin)具有抗炎、抗过敏、治疗胃溃疡的作用,分别被认为是麻黄及甘草中的代表性有效成分. (2) 洗脱:将吸附树脂用NH4OH洗脱,生物碱(Alk)
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desmosome:细胞间桥体
链解酶 desmolase | (细胞间)桥体 desmosome | 去吸附(作用) desorption
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desorb:释放出
desolation 荒芜 | desorb .释放出 | desorption 解吸附作用