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Electrophoretic Study of Binary and Mixed Metal Complexes with Medicinally Important Ligands 具有重要药用配体的二元和混合金属配合物的电泳研究
Pub Date : 2019-01-01 DOI: 10.20431/2349-0403.0602003
A. Singh, S. Verma, A. Dwivedi, O. P. Rai
Human health is closely linked with a healthy and clean environment. Rapid growth in urbanization and industrialization has increased the levels of heavy metals in the environment and consequently in the food chain. Metals ions play an important role in biological system 1-3 and required for many critical functions in human. Metal coordination to medicinally active molecules can be used to enhance their activity. The chemistry of metal-drug coordination compounds is more popular now than before particularly in the design of more biologically active drugs. 4 Many drugs posses modified pharmacological and toxicological properties when administered in the form of metallic complexes. The efficacies of the drug on coordination with a metal are enhanced in many cases. 5 Iron and Manganese are essential micronutrients with a variety of biochemical functions in all living organism. The amount of these metals can be varying in human body through intake of diet and different environmental factors, either contribute cause toxicity. 6 The present paper describes a paper electrophoretic method for the determination of stability constant of biologically significant metal complexes in solution. Stability constant is useful physical entity, which explains the importance and function of various complexes in biological systems. 7-9 High concentration of metal ions in living system can be prevented by the use of specific chelating agents. The chelation therapy for intoxication of metals depends upon the chelating agent being able to reach the intercellular site where the metals are firmly bound. For a pretty long time, varieties of ligand have been used as chelating agent to combat metal poisoning. In present study, ephedrine has been used as primary ligand, which is a sympathomimetic ammine commonly used as a stimulant, appetite suppressant, concentration aid, decongestant and treat hypotension associated with anaesthesia. Literature survey 10-16 reveals that no work has been reported using ephedrine as a primary and NTA as a secondary ligand till now. This inspired us to study the stability constant of binary and mixed complexes of ephedrine and NTA with Fe (III) and Mn (II) in solution using paper electrophoretic technique. Abstract: Metals occur naturally in the earth’s crust and their contents in the environment can vary between different regions resulting in spatial variations of background concentrations. Human health is closely linked with a healthy and clean environment. Rapid growth in urbanization and industrialization has increased the levels of heavy metals in the environment and consequently in the food chain. Metal ions are required for many critical functions, physiological and pathological process in human. Iron and Manganese are essential micronutrients with a variety of biochemical functions in all living organism and their lethal dose become toxic to human body. High concentration of metal ions in living system can be prevented by the use of spe
人的健康与健康和清洁的环境密切相关。城市化和工业化的快速发展增加了环境中的重金属含量,从而增加了食物链中的重金属含量。金属离子在生物系统1-3中起着重要作用,是人体许多重要功能的必需物质。药物活性分子的金属配位可用于增强其活性。金属-药物配位化合物的化学研究比以前更受欢迎,特别是在设计更具有生物活性的药物方面。当以金属配合物的形式给药时,许多药物具有改变的药理学和毒理学特性。在许多情况下,药物与金属的配位效果得到增强。铁和锰是所有生物体内必需的微量元素,具有多种生化功能。这些金属在人体内的含量可以通过饮食摄入和不同的环境因素而变化,两者都可能导致毒性。本文介绍了一种测定溶液中具有生物意义的金属配合物稳定常数的纸电泳方法。稳定常数是一个有用的物理实体,它解释了各种复合物在生物系统中的重要性和作用。7-9使用特定的螯合剂可以防止生命系统中高浓度的金属离子。金属中毒的螯合治疗取决于螯合剂能够到达金属牢固结合的细胞间部位。很长一段时间以来,各种配体被用作螯合剂来对抗金属中毒。麻黄碱是一种拟交感胺类药物,常用作兴奋剂、食欲抑制剂、助集中剂、减充血剂和治疗麻醉所致低血压。文献综述10-16显示,目前还没有以麻黄碱为一级配体,NTA为二级配体的研究报道。这启发了我们利用纸电泳技术研究麻黄碱和NTA与Fe (III)和Mn (II)在溶液中的二元和混合配合物的稳定性常数。摘要:金属在地壳中自然存在,不同区域环境中金属含量不同,导致背景浓度的空间变化。人的健康与健康和清洁的环境密切相关。城市化和工业化的快速发展增加了环境中的重金属含量,从而增加了食物链中的重金属含量。金属离子是人体许多重要功能和生理病理过程所必需的。铁和锰是所有生物体内具有多种生化功能的必需微量元素,其致死剂量对人体具有毒性。使用特定的螯合剂可以防止生物系统中高浓度的金属离子。采用纸电泳技术研究了Fe(III)和Mn(II)与溶液中重要药用配体麻黄碱和NTA的络合作用。在所研究的螯合物在25°C下的稳定性常数进行了测定。稳定性常数数据表明,麻黄碱和NTA可以作为螯合剂。
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引用次数: 0
Study of Rheology of Tannin Obtained from Flower Buds of Terminalia chebula (Aralu) and Formaldehyde Reaction 苦苣苔花蕾鞣质流变学及甲醛反应研究
Pub Date : 2018-11-08 DOI: 10.20431/2349-0403.0601001
S. Arasaretnam
The gelling and hardening reactions of tannin extracted from flower buds of Terminalia chebula with formaldehyde were analysed by parallel-plate rheometry techniques. In this study, a method to determine the rheological features of tannin-formaldehyde reactions both before and after the gel point was settled. The conversion from the liquid to solid state occurs at the gel point. Before the gel point, the zero shear viscosity can portray the behavior of the liquid resin. The value of this parameter rises as the polycondensation reaction proceeds, and at the gel point the weight average molecular mass turn into theoretically infinite.
采用平行平板流变法研究了从桔梗花蕾中提取的单宁与甲醛的胶凝硬化反应。本研究建立了测定凝胶点沉淀前后单宁-甲醛反应流变特性的方法。从液体到固体的转变发生在凝胶点。在凝胶点之前,零剪切粘度可以描述液态树脂的行为。该参数的值随着缩聚反应的进行而增大,在凝胶点分子量平均质量理论上趋于无限大。
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引用次数: 0
UV Spectrophotometric Determination of Allopurinol and Benzbromarone in their Binary Mixture using Artificial Neural Networks and Genetic Algorithm- Artificial Neural Networks 用人工神经网络和遗传算法紫外分光光度法测定别嘌呤醇和苯溴马隆的二元混合物
Pub Date : 2018-01-01 DOI: 10.20431/2349-0403.0508005
Mohammad Nassar, Khalid A M Attia, A. A. Mohamad, Ragab A. M. Said, R. F. A. Gaber
Combination of ALP and BENZ has the advantages of greater therapeutic effect than with either drug alone. This combination causes manifold reduction in uric acid concentrations in plasma and urine as compared to double dose of the individual drug when used alone. Also, this combination helps to decrease the dose of each active ingredient, and as a result, decreases the side effects of each of component if given separately in high doses. (3)
ALP与BENZ合用治疗效果优于单用。与单独使用双剂量药物相比,这种组合导致血浆和尿液中尿酸浓度的大幅度降低。此外,这种组合有助于减少每种活性成分的剂量,因此,如果以高剂量单独给药,可以减少每种成分的副作用。(3)
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引用次数: 1
Chemical Analysis of Hibiscus Rosa Sinenses-L 芙蓉玫瑰的化学成分分析
Pub Date : 2018-01-01 DOI: 10.20431/2349-0403.0502002
B. Pandey, S. Nigam, S. S. Paihar, A. Prasad
Hibiscus a genus of flowering plants in malvaceae family contains 100 species that are native to warm grown in subtropical and tropical regions throughout India. It includes both woody shrubs and small trees. The flowers are large and of red and white colours. It is typically found almost everywhere. The red Hibiscus is the flower of the Hindu goddess Kali in Bengal India and offered goddess and Lord Ganesha in Hindu worship.
木槿是锦葵科开花植物的一个属,有100种,生长在印度的亚热带和热带地区。它包括木本灌木和小树。这些花很大,有红色和白色。它几乎无处不在。红色的芙蓉花是印度女神卡莉的花,在印度崇拜中供奉女神和甘尼萨。
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引用次数: 0
Chemical Composition and Antioxidant Activity of Rhododendron lepidotum Wall. ex D. Don, Essential Oil from Nepal 鳞片杜鹃的化学成分及抗氧化活性研究。Don,尼泊尔的精油
Pub Date : 2018-01-01 DOI: 10.20431/2349-0403.0508003
S. Joshi, P. Thapa
Rhododendrons are of the genus Rhododendron that belonging to the family Ericaceae. It is represented by about 1025 species in the world, mostly concentrated in the Himalayan region of Nepal, and the temperate regions of Northern hemisphere especially in Sino-Himalayas (Eastern Himalayas and Western China). Besides this main centre, the Rhododendrons have further proliferated towards southern and northeastern China, Japan, Myanmar, Thailand, Malaysia, Indonesia, Philippines and New Guinea. A few species are also reported from Afghanistan, Australia Pakistan, southern parts of Europe and northern parts of America [1]. In Nepal, this genus comprises 32 species most of these are distributed at the altitude ranging from 1500-5000m.This genus has long been used as folk medicine in Nepal and other countries of the world. A few members of this genus such as R. ponticum and R. lustem contained grayanine type tetracyclic diterpenes which are known to be toxic to common livestock such as cattle. But a large members of this genus contained bioactive chemical constituents such as essential oils, ursolic acid, oleanolic acids, phenol, coumarins, flavonoids, etc these are important for human being [2].
杜鹃花属于杜鹃花属,属于杜鹃花科。世界上有1025种,主要分布在尼泊尔喜马拉雅地区和北半球温带地区,特别是中喜马拉雅地区(东喜马拉雅和中国西部)。除了这个主要中心,杜鹃花还进一步扩散到中国南部和东北部、日本、缅甸、泰国、马来西亚、印度尼西亚、菲律宾和新几内亚。在阿富汗、澳大利亚、巴基斯坦、欧洲南部和美洲北部也报道了少数种[1]。在尼泊尔,该属包括32种,其中大多数分布在海拔1500-5000米之间。这个属在尼泊尔和世界其他国家长期被用作民间药物。该属的少数成员,如石菖蒲和石菖蒲,含有对牛等普通牲畜有毒的灰氨酸型四环二萜。但该属的大部分成员含有生物活性化学成分,如精油、熊果酸、齐墩果酸、酚、香豆素、类黄酮等,这些对人类很重要[2]。
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引用次数: 1
Electrochemical Medicinal Analysis of Bhumi Amla 普密树的电化学药物分析
Pub Date : 2018-01-01 DOI: 10.20431/2349-0403.0502001
Jeetnarayan Chaturvedi, M. U. Khan, S. Sachan, A. Dwivedi
The recent advancements in medicinal chemistry not only revolutionized in traditional practice in allopathic system but in Ayurvedic generic life medicines too. The purified chemical derivatives of herbs like extracts, fractionates, and isolates are being preferred which are medicinally better than other synthetic drugs. During the last few decades, the advance studies of natural products has been tremendously was a field of research in chemistry, material science as well as life science. Natural products have come from various source material including terrestrial plants, from plant kingdom.
药物化学的最新进展不仅彻底改变了传统的对抗疗法,也改变了阿育吠陀通用生命药物。草药的纯化化学衍生物如提取物、分馏物和分离物是优选的,它们在药用上比其他合成药物更好。在过去的几十年里,对天然产物的研究在化学、材料科学和生命科学领域都取得了巨大的进展。天然产物的来源多种多样,包括陆生植物、植物界。
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引用次数: 0
Nicotinium Dichromate Oxidation of Mandelic Acid and P-Chloromandelic Acid 重铬酸镍氧化扁桃酸和对氯扁桃酸
Pub Date : 2018-01-01 DOI: 10.20431/2349-0403.0502003
S. Mishra, M. Swami, N. Manikpuri, A. Dwivedi
The mandelic acid and Þ-chloromandelic acid are bifunctional compounds contain hydroxyl (–OH) and carboxylic group (–COOH), exhibiting different kinds of reactions when attached by the oxidants. A lot of works on the kinetics and oxidation of mandelic acid and p-substituted mandelic acid by various oxidants like halogens ,[1] NBS [2] , CAB [3] , KMnO4, [4] H2CrO4, [5] K2Cr2O7 [6] , NCSA [7] have been extensively carried out by many eminent authors.
杏仁酸和Þ-chloromandelic酸是含有羟基(-OH)和羧基(-COOH)的双功能化合物,在氧化剂的作用下会发生不同的反应。许多著名的作者对扁桃酸和对取代扁桃酸在卤素[1]NBS[2]、CAB[3]、KMnO4、[4]H2CrO4、[5]K2Cr2O7[6]、NCSA[7]等各种氧化剂的氧化动力学和氧化进行了大量的研究。
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引用次数: 0
Synthesis and Characterization of Oxovanadium (Iv) Complexes and Metal (Ii) Schiff Base Complexes 氧化钒(Iv)配合物和金属(Ii)席夫碱配合物的合成与表征
Pub Date : 2018-01-01 DOI: 10.20431/2349-0403.0503004
S. Shrestha
Schiff bases are typically formed by the condensation of a primary amine andan aldehyde/ketone. The resultant compound, R1R2C=NR3, is called a Schiff base(named after Hugo Schiff), where R1 is an aryl group, R2 is a hydrogen atom and R3is either an alkyl or aryl group. Schiff bases are generally bidentate (1), tridentate (2), tetradentate (3) orpolydentate (4) ligands capable of forming very stable complexes with transitionmetals. They can only act as coordinating ligands if they bear a functional group,usually the hydroxyl, sufficiently near the site of condensation in such a way that afive or six membered ring can be formed when reacting with a metal ion (Fig. 1.).
希夫碱通常由伯胺和醛/酮缩合而成。合成的化合物R1R2C=NR3被称为希夫碱(以雨果·希夫的名字命名),其中R1是一个芳基,R2是一个氢原子,r3是烷基或芳基。席夫碱通常是双齿(1)、三齿(2)、四齿(3)或多齿(4)配体,能够与过渡金属形成非常稳定的配合物。它们只能作为配位体,如果它们具有一个官能团,通常是羟基,足够靠近缩合部位,这样当与金属离子反应时,可以形成五元或六元环(图1)。
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引用次数: 1
Modeling of Breakthrough Curves for Removal of Chromium from Waste Water 废水中铬的脱除突破曲线建模
Pub Date : 2018-01-01 DOI: 10.20431/2349-0403.0506005
D. S. Kulkarni, A. Mishra, S. Patil, Kiran Uphale
The development in technology and industrial activities has lead to release of various metal ions to the environment. The present study aims to assess the efficiency of Rice Husk in treating chromium (VI) from simulated wastewater, with the help of fixed-bed adsorption column by performing continuous adsorption experiment. The results obtained through this study were confirmed by developing a model. A detailed analysis on the effects of extensive parameters on the adsorption experiment was done. The extensive parameters considered were Concentration, Flow-rate, and Bed-height. It was observed that as flowrate decreased from 60 ml/min to 30ml/min, the breakthrough time also decreased from 30 to 20 min. whereas as when the concentration was increased from 250 mg/L to 1000 mg/, the breakthrough time came down to 10 min fro m 40 min. The parameters which were calculated were total percentage removal of Cr (VI) and breakthrough time. It was observed that the exhaustion time decreases with increase in the concentration and flow rate and it increases with bed height. The data obtained during the entire experiment were fitted in Thomas and Yoon Nelson Model. The values of the model parameters were evaluated and analyzed.
科技和工业活动的发展导致各种金属离子释放到环境中。本研究利用固定床吸附柱进行连续吸附实验,考察稻壳对模拟废水中六价铬的处理效果。通过建立模型验证了本研究的结果。详细分析了各种参数对吸附实验的影响。广泛考虑的参数有浓度、流速和床层高度。结果表明,当流速从60 ml/min降低到30ml/min时,突破时间从30 min缩短到20 min,当浓度从250 mg/L增加到1000 mg/L时,突破时间从40 min缩短到10 min。计算了Cr (VI)的总去除率和突破时间。随着浓度和流量的增加,衰竭时间减小,随着床层高度的增加,衰竭时间增大。整个实验过程中得到的数据用Thomas和Yoon Nelson模型进行拟合。对模型参数的取值进行了评价和分析。
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引用次数: 0
Study of Oxidation of Some Alpha Amino Acids by 1, 3-Dichloro-5, 5-Dimethylhydantoin in Aqueous Acetic Acid Medium 1,3 -二氯- 5,5 -二甲基海因在醋酸水溶液中氧化某些α氨基酸的研究
Pub Date : 2018-01-01 DOI: 10.20431/2349-0403.0503002
S. Neeraj, S. S. Parihar, A. Dwivedi
1,3-dichloro-5,5-dimethylhydantoin (DCDMH) belongs to the class of N-halo compounds and is a moderate oxidant. The final hydrolysis of this compound leads to the formation of active positive halogen species like HOCl and H2O + Cl. The H2O + Cl manifests more in non-polar or less polar media, extensively used as a chlorinating and oxidizing agents in organic substrates. The generated species are utilized in solution and gaining importance in organic synthesis and also in analytical determination of organic compounds. 1,2 Since the N-halooxidants exhibit appreciable stability both in acid and alkaline medium 3,4 hence widely used in kinetic studies. Biological production of hypochlorous acid (HOCl) is also reported during activation of ecosinophilis. The H2O + Cl and HOCl thus produced kill the invading pathogens and also play an important role in damaging the tissues. It was also concluded that alphaaminoacids namely l-Alanine and l-Glycine are the major biological compounds 5 reacting with the H2O + Cl.
1,3-二氯-5,5-二甲基海因(DCDMH)属于n -光环类化合物,是一种中等氧化剂。该化合物的最终水解导致HOCl和H2O + Cl等活性正电卤素物质的形成。H2O + Cl多存在于非极性或非极性介质中,在有机基质中广泛用作氯化剂和氧化剂。所生成的物质在溶液中得到利用,在有机合成和有机化合物的分析测定中越来越重要。1,2由于n -卤代氧化剂在酸性和碱性介质中均表现出可观的稳定性3,4,因此被广泛用于动力学研究。次氯酸(HOCl)的生物生产也报道在激活嗜生态杆菌。由此产生的H2O + Cl和HOCl杀死入侵的病原体,并在破坏组织中发挥重要作用。α氨基酸即l-丙氨酸和l-甘氨酸是与H2O + Cl反应的主要生物化合物。
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引用次数: 0
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International Journal of Advanced Research in Chemical Science
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