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Green Synthesis of Silver Nanoparticles Using Tabebuia Aurea Leaf Extract 用金莲叶提取物绿色合成纳米银
Pub Date : 2017-06-01 DOI: 10.9790/5736-1006012329
B. Prathibha, K. Priya
Silver nano particles were synthesized using Tabebuia aurea (TA) leaf extracts as reducing agents and silver nitrate as precursor. This method provides an economic and eco-friendly green synthesis of silver nano particles. Formation of silver nano particles were confirmed by colour change from light brown to dark brown. The aqueous silver ions when exposed to leaf broth were reduced and resulted in the green synthesis of silver nano particles. The bio reduced silver nano particles were characterized by UV-Vis spectrophotometer, SEM and EDX. The absorbance spectrum of aqueous medium containing SNPs showed a peak at around 410440nm.
以金银花叶提取物为还原剂,硝酸银为前驱体,合成了纳米银颗粒。该方法提供了一种经济、环保的绿色合成银纳米粒子的方法。银纳米粒子的形成通过颜色从浅棕色到深棕色的变化得到证实。当暴露于叶片肉汤时,水银离子被还原,导致银纳米颗粒的绿色合成。采用紫外可见分光光度计、扫描电镜和EDX对生物还原银纳米颗粒进行了表征。含SNPs的水溶液在410440nm附近有一个吸光度峰。
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引用次数: 7
Synthesis, Characterization and Antibacterial Activityof Schiff Bases Derived from 4-Dimethylaminobenzaldehyde with Some Amino Acids and 4-Aminoantipyrine toward Cu (II), Ni (II), Co (II), Cd (II) and Mn (II) Ions 4-二甲氨基苯甲醛席夫碱的合成、表征及对Cu (II)、Ni (II)、Co (II)、Cd (II)和Mn (II)离子的抑菌活性
Pub Date : 2017-06-01 DOI: 10.9790/5736-1006010613
Rashd. M. El Ferjani, M. Ahmad, F. Harun, Bulgasem Y. Bulgasem
A new chain of Schiff base complexes made up of Cu (II), Co (II), Cd (II),Ni (II), and Mn (II) ions derivatives were obtained by the condensation of 4-dimethyl-aminobenzaldehyde, and 4-aminoantipyrin and some amino acids. The structures of all synthesized complexes were established on the basis of their elemental analysis (UV, FTIR, and 1 HNMR). The study of X-ray crystallographic shows that the compound (Z)-4-((4(dimethylamino)benzylidene)amino)-1,5-dimethyl-2-phenyl-1,2-dihydro-3H-pyrazol-3-one (L5) crystallized in monoclinic system with space group of C2/c and the unit cell dimensions are a= 17.7916, b= 6.8610, c= 29.7199, α =90.000 β =101.326 γ = 90.000., Z = 8 and V = 3557.20 Å 3 .The antibacterial activity of the complexes are tested against Bacillus subtilis, Bacillus cereus and Pseudomonas aeruginosa.
通过4-二甲基氨基苯甲醛、4-氨基安替吡林和某些氨基酸的缩合反应,得到了由Cu (II)、Co (II)、Cd (II)、Ni (II)和Mn (II)离子衍生物组成的新的席夫碱配合物链。通过元素分析(UV, FTIR和1hnmr)确定了所有合成配合物的结构。x射线晶体学研究表明,化合物(Z)-4-((4(二甲氨基)苄基)氨基)-1,5-二甲基-2-苯基-1,2-二氢- 3h -吡唑-3-酮(L5)在单斜晶系中结晶,空间群为C2/c,晶胞尺寸为a= 17.7916, b= 6.8610, c= 29.7199, α =90.000 β =101.326 γ =90.000。, Z = 8, V = 3557.20 Å 3 .测定了该配合物对枯草芽孢杆菌、蜡样芽孢杆菌和铜绿假单胞菌的抑菌活性。
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引用次数: 5
Comparison of Thermal Degradation, WAXRD Studies and SEM of Renewable Resources Based Interpenetrating Polymer Networks 基于可再生资源互穿聚合物网络的热降解比较、WAXRD研究和SEM研究
Pub Date : 2017-06-01 DOI: 10.9790/5736-1006020825
B. Satpathy, N. Pal
Recently bio-based polymers have received great importance due to their eco-friendly properties towards environment. As a substitute of conventional reinforcing synthetic polymer, bio-based polymers were from renewable resources like cardanol, i.e., the meta-substituted phenolic compound the chief product of CNSL. A number of IPNs have been synthesized by condensing di-azotised-4-amino benzoic acid and 3-amino benzoic acid cardanol dye with polyurethane of soybean oil. The IPNs produced have been characterized by FTIR, TGA, DSC (Differential scanning calorimetry). Elemental analysis and WAXRD studies. Thermal stability of IPNs has been studied by both TGA and DSC which provides heat capacity and kinetic parameters (order of reaction and activation energy) by Freeman Anderson method of the sample.
近年来,生物基聚合物因其对环境的友好性而受到人们的重视。作为传统补强合成聚合物的替代品,生物基聚合物来源于腰果酚等可再生资源,即CNSL的主要产物间取代酚类化合物。以大豆油聚氨酯为原料,通过缩合二氮化-4-氨基苯甲酸和3-氨基苯甲酸腰果酚染料,合成了多种ipn。用红外光谱(FTIR)、热重分析(TGA)、差示扫描量热法(DSC)对合成的ipn进行了表征。元素分析和WAXRD研究。通过热重分析和差热分析研究了ipn的热稳定性,并通过Freeman Anderson法给出了样品的热容和动力学参数(反应阶数和活化能)。
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引用次数: 0
Determination of Kinetic Parameters in the interaction between Hydrogen Peroxide and Chromium (VI) Oxide 过氧化氢与氧化铬相互作用动力学参数的测定
Pub Date : 2017-06-01 DOI: 10.9790/5736-1006019194
Abdu, U. Faruq, A. Aska, S. Dangoggo, K. Baraya
The kinetics of the interaction between Chromium (vi) Oxide and Hydrogen Peroxide were studied. Hydrogen Peroxide is marketed in the form of an aqueous solution and being a limiting reagent in this research, its concentration was first determined by titration with standard solution of Potassium Permanganate (0.02M) before its subsequent utilization. The effect of varying mass of CrO3 on the decomposition of fixed volume of H2O2 was studied by measuring the volume of oxygen evolved and the time taken for the evolution to cease. Similarly, the effect of the decomposition of varying volumes of H2O2 with fixed mass of CrO3 was also studied. At the end of the reaction, the volume of O2 evolved and the time taken for the evolution of O2 were equally recorded. The results of the above decompositions indicated that CrO3 acted as a catalyst. The decomposition of H2O2 catalyzed by CrO3 was found to be a first order reaction. This was determined through the measurement of the half-life of the same reaction. The results of the titrations of acidified solution of H2O2 against KMnO4 solution at different time intervals carried out at 35 o C and 45 o C were used in calculating the specific rate constants and were found to be 3.11 x10 -2 and 6.11 x 10 respectively. Furthermore, the values of the specific rate constants obtained were used in calculating the activation energy of the reaction (Ea) which was found to be 13.49075 kcal.
研究了氧化铬与过氧化氢相互作用的动力学。双氧水以水溶液形式销售,本研究中双氧水为限用试剂,首先用高锰酸钾标准溶液(0.02M)滴定测定其浓度,然后再使用。通过测定析氧量和析氧停止时间,研究了不同质量的CrO3对固定体积H2O2分解的影响。同样,还研究了不同体积的H2O2与固定质量的CrO3的分解效果。在反应结束时,同样记录O2的释放量和O2的释放时间。上述分解结果表明,CrO3起催化剂的作用。发现在CrO3催化下H2O2的分解为一级反应。这是通过测量同一反应的半衰期来确定的。在35℃和45℃条件下,用不同时间间隔的H2O2酸化溶液对KMnO4溶液进行滴定,计算出比速率常数分别为3.11 × 10 -2和6.11 × 10。用所得的比速率常数值计算了反应的活化能(Ea),得到的活化能为13.49075 kcal。
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引用次数: 1
The Influence of Process Energy on the Yield of Asymmetric Curcumin Analog from Cullilawan Oil 工艺能量对黄芪油中不对称姜黄素类似物收率的影响
Pub Date : 2017-06-01 DOI: 10.9790/5736-1006010105
I. B. D. Kapelle, T. Irawadi, M. S. Rusli, Nini Munirah Renur
Asymmetric curcumin analogue compound is an anticancer compound synthesized from cullilawan oil with several stages of the process such as; Isolation of safrol from cullilawan oil, safol isomerisation, oxidation, intermediate product synthesis and asymmetric curcumin analog synthesis. The amount of energy used for asymmetric curcumin analog synthesis process gives effect to yield. The purpose of this research is to know the effect of process energy on asymmetric curcumin analogue yield from lawang oil. The results of the study showed that the synthesis of curcumin analogue compounds using microwave method on different energy quantities (8.4kJ, 25.2 kJ, 33.6 kJ, 75 kJ) gives effect to yield. The greater the energy used in the process will lower the yield and the energy that gives the highest yield is 8.4 kJ.
不对称姜黄素类似物是以黄芩油为原料,经过以下几个步骤合成的抗癌化合物;黄芩油中黄樟醇的分离、黄樟醇异构化、氧化、中间产物合成及不对称姜黄素类似物的合成。不对称姜黄素类似物合成过程的能量用量对收率有影响。本研究的目的是了解工艺能量对从罗旺油中提取不对称姜黄素类似物收率的影响。研究结果表明,不同能量(8.4kJ、25.2 kJ、33.6 kJ、75 kJ)下微波法合成姜黄素类似物对收率有影响。过程中使用的能量越大,产率越低,最高产率的能量为8.4 kJ。
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引用次数: 0
Removal of Pb2+ and Cd2+ Ions, Colour and Turbidity from Water Using Carbon and Ash Derived From Maize Cobs 利用玉米芯碳和灰去除水中Pb2+和Cd2+离子、色度和浑浊度
Pub Date : 2017-06-01 DOI: 10.9790/5736-1006015868
Daniel Muvengei, H. Mbuvi, M. Ng′ang′a
About 17.2 million Kenyans lack access to clean water due to increased population growth, high rate of industrialisation and poor waste management. The situation may worsen if immediate measures are not taken. Lead and cadmium are the main heavy metals in contaminated water and their harmful effects such as lung cancer, mental retardation and nerve disorder cannot be under estimated. Available methods for removing these metal ions from water such as use of activated carbon are very expensive and unaffordable to low income earners. Maize cobs which have minimal use after maize harvesting can be utilised to reduce environmental pollution. The primary aim of this study was to investigate the ability of maize cobs derived products to adsorb both lead (II) and cadmium (II) ions and remove methylene blue and turbidity from contaminated water. Maize cobs charcoal was prepared by heating dry maize cobs in a furnace in limited air. Activation was done by use of 1 M sulphuric acid and heating the mixture in a closed vessel. Maize cob ash was generated by heating dry maize cobs in a furnace. Ability of these adsorbents to adsorb lead (II) and cadmium (II) ions from the solution was investigated by carrying out batch experiment and varying parameters such as contact time, initial metal ion concentration, adsorbent dose, temperature and shaking speed. The data obtained was fitted in Langmuir and Freundlich models. Activated charcoal gave the best fit in Langmuir for lead ions with maximum adsorption capacity of 13.0 mg/g. Ash fitted in Freundlich model with r 2 =0.953. For removal of cadmium (II) ions, all the adsorbents gave best fit in Freundlich with maize cob charcoal having the highest adsorption capacity of 24.3 mg/g and r 2 =0.997. Among the three adsorbent only ash was found to have the ability of removing turbidity from water. This implies that maize cob derived products can be used to remove lead (II) and cadmium (II) ions
由于人口增长、工业化程度高和废物管理不善,大约有1720万肯尼亚人无法获得清洁水。如果不立即采取措施,情况可能会恶化。铅和镉是污染水中的主要重金属,它们对肺癌、智力迟钝和神经障碍等的有害影响不容低估。从水中去除这些金属离子的现有方法,如使用活性炭,非常昂贵,低收入者负担不起。玉米收获后使用最少的玉米芯可用于减少环境污染。本研究的主要目的是研究玉米芯衍生产品吸附铅(II)和镉(II)离子以及去除污染水中亚甲基蓝和浊度的能力。玉米芯炭是通过在有限空气条件下加热干燥的玉米芯而制备的。活化是通过使用1 M硫酸和加热混合物在一个封闭的容器。玉米芯灰是通过在炉中加热干燥的玉米芯而产生的。通过批量实验和不同接触时间、初始金属离子浓度、吸附剂剂量、温度和摇动速度等参数,考察了这些吸附剂对溶液中铅(II)和镉(II)离子的吸附能力。所得数据用Langmuir和Freundlich模型拟合。活性炭对铅离子的最大吸附量为13.0 mg/g。Ash符合Freundlich模型,r2 =0.953。在Freundlich实验中,各吸附剂对镉(II)的吸附效果最佳,玉米芯炭吸附量最高,为24.3 mg/g,吸附系数r2 =0.997。在三种吸附剂中,只有灰具有去除水中浊度的能力。这意味着玉米芯衍生产品可用于去除铅(II)和镉(II)离子
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引用次数: 1
Synthesis of SiO2 based nanocomposite of Agar and its characterization 二氧化硅基琼脂纳米复合材料的合成及其表征
Pub Date : 2017-06-01 DOI: 10.9790/5736-1006017985
D. Sen
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引用次数: 0
Control and Management of Tomato Leafminer -Tuta Absoluta (Meyrick) (Lepidotera, Gelechiidae).A Review 番茄小叶螨(鳞翅目,蠓科)的防治回顾
Pub Date : 2017-06-01 DOI: 10.9790/5736-1006011422
Daniel Tsingay Illakwahhi, B. Srivastava
The tomato leafminer, Tuta absoluta (Meyrick), is becoming one of the key pests of tomato in Tanzania; which account for its production loss of up to 80 to 100% if left unchecked. The pest was first introduced in Tanzania in 2014.due to porous nature of our borders and lack of quarantine regulations implementation. Tomato producers in Tanzania have little understanding of leafminers, and hence lack best practices for it control. The pest have developed resistance to dozens of pesticides and therefore the (IPM) strategy that employs bio-chemical, biological, physical and cultural methods is the only best option we had at time. Since its introduction in 2014, there was no any sound action plan implemented. Thus, the aim of this review paper is to call for attentions and concerted actions of concerned sectors by describing the potential damage of the pest, its entry, pathways and its control methods. There is a need for all stakeholders to meet and discuss the possible ways of containing and controlling the current Tuta absoluta outbreak.
番茄叶螨(Tuta absoluta (Meyrick))正在成为坦桑尼亚番茄的主要害虫之一;如果不加以控制,其产量损失高达80%至100%。这种害虫于2014年首次在坦桑尼亚被引入。由于我们边境的漏洞和缺乏检疫条例的执行。坦桑尼亚的番茄生产者对叶蝉知之甚少,因此缺乏控制叶蝉的最佳方法。这种害虫已经对几十种杀虫剂产生了抗药性,因此采用生化、生物、物理和培养方法的(IPM)策略是我们当时唯一的最佳选择。自2014年实施以来,没有实施任何完善的行动计划。因此,本文的目的是通过描述这种害虫的潜在危害、其进入、途径和控制方法,呼吁有关部门的注意和协调行动。所有利益攸关方都有必要开会讨论遏制和控制目前“绝对结核”疫情的可能方法。
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引用次数: 22
Contribution of components of Green Supply Chain Carbon Management in Green Supply Chain Performance measurementA Pilot Empirical Study of the Indian Automobile Manufacturing Sector 绿色供应链碳管理组件对绿色供应链绩效评估的贡献——以印度汽车制造业为例的试点实证研究
Pub Date : 2017-06-01 DOI: 10.9790/5736-1006014750
M. A. Gandhi
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引用次数: 0
Predictive Modeling and Detection of Insulation Failure in a Natural Gas Pipeline Transmission System 天然气管道输送系统绝缘故障预测建模与检测
Pub Date : 2017-06-01 DOI: 10.9790/5736-1006015157
A. Orga, Okure, E. Awheme, J. I. Obibuenyi, M. Anusi, C. Emelu
In this paper, a model/software that can predict insulation failure in a natural gas pipeline transmission system was developed by applying established principles of heat flow and gas dynamics. By using the model/software, one will not only know when insulation failure occurred but the location in the long distance pipeline where it occurs. This will reduce the problems associated with late detection, with its adverse consequences such as hydrate formation and pipeline blockage, and explosion and fire!
本文应用热流和气体动力学原理,开发了天然气管道输送系统保温失效预测模型/软件。通过使用模型/软件,人们不仅可以知道绝缘故障发生的时间,还可以知道它在长输管道中的位置。这将减少与后期检测相关的问题,及其不良后果,如水合物形成和管道堵塞,爆炸和火灾!
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引用次数: 0
期刊
IOSR Journal of Applied Chemistry
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