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1.
摘要:目的研究葡萄糖胺和麦芽糖胺-过渡金属配合物的结构,为其应用奠定基础,合成及表征了4个葡萄糖胺和麦芽糖胺-过渡金属配合物。方法以葡萄糖和麦芽糖为原料,将合成的双葡萄糖丙二胺配体及双麦芽糖丙二胺配体分别与过渡金属Cu(II)、Ni(II)形成配合物。结果以33.9 %~73.8 % 的产率制备了4个葡萄糖胺和麦芽糖胺-过渡金属配合物,并通过紫外、红外、元素分析、摩尔电导等数据推测出了配合物的结构式。结论过渡离子与配体的摩尔比为1 : 2,Cu(II)配合物含有两种配位构型分别为不规则四边形和三角双锥,而Ni(II)配合物的构型为2分子水参与的八面体构型。  相似文献   

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以N ,N′ 二 (2 氨乙基 )草酰胺合镍 (Ⅱ )Ni(oxen)为单核片断合成了桥联双核配合物 [Ni(oxen)Cu(bpy) 2 ](ClO4 ) 2 ·H2 O ,通过元素分析、摩尔电导、IR、UV、热分析等对其结构进行了表征 ,通过单晶衍射测定了其晶体结构 ,并对其抗菌活性进行了初步研究  相似文献   

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目的 拟合成金属血卟啉配合物 ,作为超氧化物歧化酶 (SOD)和过氧化氢酶 (Cat)的双功能模拟酶。方法 以血红素为原料制备金属血卟啉配合物 ,用核黄素 -蛋氨酸光照法与分光光度法进行仿SOD与Cat部分功能的研究。结果 合成的 3种配合物在 10 -5~ 10 -6mol·L-1浓度范围内有清除氧阴离子自由基 (O-2 )和分解H2 O2 的作用。结论 所合成的 3种配合物有良好的仿SOD及Cat酶活性  相似文献   

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《中国药物化学杂志》2001,11(4):205-208
以N,N′-二(2-氨乙基)草酰胺合镍(Ⅱ)Ni(oxen)为单核片断合成了桥联双核配合物[Ni(oxen)Cu(bpy)  相似文献   

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合成了 6 ,7 二氰基 二吡啶 [2 ,2 d :2′ ,3′ f]喹喔啉 (L)与钴 (II)形成的配合物 [CoL(NO3 ) 2 (CH3 CN) ](1)。通过元素分析、IR对其组成和性质进行了表征 ,并测定了它的晶体结构。结果表明 ,钴原子与 3个N原子和四个O氧原子形成变形五角双锥配位构型。体外抗肿瘤活性筛选试验结果表明 :该配合物具有强的抗肿瘤活性 ,且配合物活性明显优于配体。通过紫外滴定、粘度滴定、解链温度测定等方法研究了化合物及配体与CT DNA的作用模式及结合常数 ,结果表明配合物与CT DNA的作用模式为典型的嵌插作用 ,配合物和配体与CT DNA的结合常数分别为 4 .4 3× 10 5mol·L-1和 1.6 5× 10 5mol·L-1。  相似文献   

6.
目的 设计合成一系列双取代乙二胺过渡金属配合物并寻找抗菌活性药物。方法以N,N’-双取代乙二胺为配体合成过渡金属配合物,并进行体外抑菌活性筛选。结果合成了6个(Ⅲ1-6)新配合物,其结构经红外光谱、元素分析确证。结论初步抑菌实验表明,合成的配合物对多种菌株有明显的抑制活性,有进一步研究的价值。  相似文献   

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目的 设计合成一系列双取代乙二胺过渡金属配合物并寻找抗菌活性药物。方法 以N ,N′-双取代乙二胺为配体合成过渡金属配合物,并进行体外抑菌活性筛选。结果 合成了6个(Ⅲ1-6)新配合物,其结构经红外光谱、元素分析确证。结论 初步抑菌实验表明,合成的配合物对多种菌株有明显的抑制活性,有进一步研究的价值。  相似文献   

8.
2-乙酰噻吩吖嗪及其过渡金属配合物的合成与活性   总被引:1,自引:0,他引:1  
目的 研究2-乙酰噻吩吖嗪及其过渡金属Cu^2 ,Fe^3 配合物的合成与生物活性。方法 从2-乙酰噻吩和水合肼出发合成2-乙酰噻吩吖嗪,进而合成了其过渡金属Cu^2 ,Fe^3 的配合物。用MS,^1H—NMR对配体进行了确认。通过元素分析、摩尔电导率、红外光谱、紫外光谱等手段对配合物进行了表征。用NBT法研究了配合物对超氧阴离子自由基的抑制作用;并利用MTT法和SRB法对其进行了抗肿瘤活性体外筛选实验。结果 发现配体和配合物都具有一定的生物活性,且Cu配合物活性较好。结论 配合物的生物活性可能与中心离子的最外层d轨道的电子结构有关。  相似文献   

9.
用双乙酰丙酮和席夫碱半体(H2L0)合成得到双席夫碱配体(I)及其双核Cu(II)配合物(II),通过元素分析、1HNMR、IR、UV-vis和MS等对其进行了表征,并采用邻苯三酚自氧化法测定了它们模拟超氧化物歧化酶(SOD)活性。结果表明,它们均具有良好的SOD活性。  相似文献   

10.
目的:合成罗格列酮氧钒配合物并进行表征。方法:取罗格列酮与五水硫酸氧钒(VOSO4·5H2O)在适当的条件下(溶剂为乙醇,反应pH值为6)合成罗格列酮氧钒配合物,运用核磁共振氢谱和红外光谱等分析方法对配合物的结构进行了初步确证。结果与结论:确证形成了新的化合物即罗格列酮氧钒配合物,配合物中罗格列酮的化学结构未发生变化,其中2个氧钒均与1个罗格列酮和3个水分子结合。  相似文献   

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This study describes a new approach for organophosphorous (OP) antidotal treatment by encapsulating an OP hydrolyzing enzyme, OPA anhydrolase (OPAA), within sterically stabilized liposomes. The recombinant OPAA enzyme was derived from Alteromonas strain JD6. It has broad substrate specificity to a wide range of OP compounds: DFP and the nerve agents, soman and sarin. Liposomes encapsulating OPAA (SL)* were made by mechanical dispersion method. Hydrolysis of DFP by (SL)* was measured by following an increase of fluoride ion concentration using a fluoride ion selective electrode. OPAA entrapped in the carrier liposomes rapidly hydrolyze DFP, with the rate of DFP hydrolysis directly proportional to the amount of (SL)* added to the solution. Liposomal carriers containing no enzyme did not hydrolyze DFP. The reaction was linear and the rate of hydrolysis was first order in the substrate. This enzyme carrier system serves as a biodegradable protective environment for the recombinant OP-metabolizing enzyme, OPAA, resulting in prolongation of enzymatic concentration in the body. These studies suggest that the protection of OP intoxication can be strikingly enhanced by adding OPAA encapsulated within (SL)* to pralidoxime and atropine.  相似文献   

14.
In order to find out the values of the steroid resources for the future use. the compositions and contents of steroidal sapogenins from 13 domestic plants have been investigated. As a result,Dioscorea nipponica, D. quinqueloba andSmilax china were found to have large amount of diosgenin. And pennogenin inTrillium kamtschaticum andParis verticillata, yuccagenin inAllium fistulosum, hecogenin inAgave americana and neochlorogenin inSolanum nigum were appeared to be major steroidal sapogenins.  相似文献   

15.
Clinical and in vitro investigations were carried out to test the efficacy of gut lavage, hemodialysis, and hemoperfusion in the treatment of poisoning with paraquat or diquat. In a patient suffering from diquat intoxication 130 times more diquat was removed by gut lavage 30 h after ingestion than was removed by complete aspiration of the gastric contents.Determination of in vitro clearances for paraquat and diquat by hemodialysis showed that, at serum concentrations of 1–2 ppm, such as are frequently encountered in poisoning in man, toxicologically relevant quantities of herbicide cannot be removed from the body. At a concentration of 20 ppm, on the other hand, hemodialysis proved to be effective, the clearance being 70 ml/min at a blood flow rate of 100 ml/min. The efficacy of hemoperfusion with coated activated charcoal was on the whole better. Especially at concentrations around 1–2 ppm, the clearance values for hemoperfusion were some 5–7 times higher than those for hemodialysis.In a patient suffering from paraquat poisoning, both hemodialysis as well as hemoperfusion were carried out. The in vitro results could be confirmed: At serum concentrations of paraquat less than 1 ppm no clearance could be obtained by hemodialysis while by hemoperfusion with activated charcoal quite high clearance values were measured and the serum level dropped down to zero.
Zusammenfassung Klinische Untersuchungen und Laboratoriumsversuche wurden durchgeführt, um die Wirksamkeit von Darmspülung, Hämodialyse und Hämoperfusion bei Paraquat- und Deiquat-Vergiftungen zu prüfen.Bei einem Patienten wurde 30 Std nach Deiquat-Aufnahme durch Darmspülung 130mal mehr Deiquat entfernt als durch vollständige Aspiration des Mageninhaltes. In vitro-Versuche ergaben, daß bei Blutserumkonzentrationen von 1–2 ppm, die bei Vergiftungen oft gemessen werden, durch Hämodialyse keine toxikologisch relevanten Paraquat- oder Deiquat-Mengen entfernt werden können. Dagegen erwies sich die Hämodialyse bei 20 ppm und einer Blutumlaufgeschwindigkeit von 100 ml/min mit einer Clearance von 70 ml/min als wirksam. Die Hämoperfusion mit beschicheter Aktivkohle war in diesen Versuchen aber eindeutig überlegen, denn insbesondere bei Konzentrationen um 1–2 ppm waren die Clearance-Werte 5–7mal höher als bei der Hämodialyse.Die in vitro-Ergebnisse wurden bei einem Patienten mit einer Paraquat-Vergiftung bestätigt: Bei Konzentrationen unter 1 ppm war die Hämodialyse wirkungslos, während durch Hämoperfusion relativ hohe Clearance-Werte erreicht wurden, so daß der Serumspiegel rasch unter die Nachweisgrenze abfiel.
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This article assesses pain within the context of the dose response. A substantial number of studies indicate that the dose response for pain-related endpoints is commonly biphasic, being independent of the type of biological model employed, endpoint measured, or agent tested. The quantitative features of the dose response are also remarkably consistent regardless of the receptor pathway that mediates the nociceptive response, indicating a likely downstream message convergence. These findings have important implications for drug discovery, development, and clinical evaluation.  相似文献   

19.
Zusammenfassung Mittels Gaschromatographie und Dünschichtchromatographie wiesen die Autoren 11 Substanzen nach, welche durch Injektion oder nach Verabreichung per os in die Kniegelenksynovialflüssigkeit eindrangen. In ihrer Aufstellung konnten sie eine direkte Beziehung zwischen Struktur sowie chemischphysikalischen Eigenschaften der Substanz und ihrer Fähigkeit, aus dem Blut in die Kniegelenksynovialflüssigkeit einzudringen, nicht nachweisen, außer der Tatsache, daß Substanzen mit starker Affinität zu Eiweißstoffen erst in höheren Dosen nachweisbar waren.  相似文献   

20.
The current USP National Formulary contains 65 Monographs for drug formulations containing neomycin. All 65 Monographs prescribe a bioassay for neomycin assay. This bioassay, based on cell culture, is labor intensive, has poor precision, and cannot be adapted for purity or identification. High-performance anion-exchange chromatography with integrated pulsed amperometric detection (HPAE-IPAD), a liquid chromatography technique, has been shown to be suitable for neomycin purity analysis and neomycin assay of an over-the-counter first aid cream (Hanko and Rohrer [17]). Here we propose that an HPAE-IPAD assay can replace the bioassay in the 65 neomycin-containing Monographs. We applied the HPAE-IPAD assay to four neomycin-containing drug products representing the four classes of formulations found in the 65 Monographs, liquid, solid, suspension, and cream. Each drug was analyzed with two chromatography systems, and on 3 separate days. For all products, HPAE-IPAD measurements were precise and accurate with respect to the label concentrations. There was also high accuracy for spike recovery of neomycin from the four drug products throughout 70–150% of the labeled concentration. These results suggest that an HPAE-IPAD assay would be an accurate assay for neomycin, and would be faster and more precise than the current bioassay.  相似文献   

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