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Phenol Removal by Tyrosinase, Immobilized in Modified Poly-N-vinylpyrrolidone, with Inorganic Coagulants Application 改性聚n -乙烯基吡咯烷酮固定化酪氨酸酶对苯酚的去除及无机混凝剂的应用
Pub Date : 2011-04-30 DOI: 10.15866/IREBIC.V2I2.1511
I. Romanovska, Yu. A. Shesterenko, O. Sevast’yanov, V. Osetrov, I. Pashkin
Enzymatic removal of phenol from aqueous solution was undertaken by the combined use of partially purified mushroom tyrosinase, immobilized in modified poly-N-vinylpyrrolidone, and inorganic coagulants (potassium, ammonium and ferric ammonium alum). Under optimum conditions (pH=6.5, T=25 °C, time of transformation – 1h) immobilized tyrosinase catalyzed the complete oxidation of phenol in batch reactor during 8 cycles, and the total number of cycles with a high degree of phenol transformation reaches 15. Inorganic coagulants eliminate colored products of phenol oxidation in a broad range of initial pollutant concentrations (0.5-10 mmol/dm3). The removal rates in all cases exceeded 97%
通过将部分纯化的蘑菇酪氨酸酶固定在改性聚n -乙烯基吡咯烷酮和无机混凝剂(钾、铵和铁铵明矾)中,对水溶液中的苯酚进行酶解。在最佳条件(pH=6.5, T=25℃,转化时间- 1h)下,固定化酪氨酸酶催化间歇式反应器中苯酚的完全氧化需要8个循环,苯酚转化率较高的总循环次数达到15次。无机混凝剂可以在很宽的初始污染物浓度范围内(0.5-10 mmol/dm3)消除酚氧化的有色产物。所有病例的去除率均超过97%
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引用次数: 0
Essential Oils from the Leaves and Fruit of Wild Medlar in Iran 伊朗野生枸杞叶和果实的精油
Pub Date : 2011-04-30 DOI: 10.15866/IREBIC.V2I2.1509
S. N. Azizi, Atefeh Shoorzandi
The objective of the present study is focused on the chemical composition of the organic compound from Medlar's leave and fruit of Iran (Savadkooh, Mazandaran). Organic compound were extracted through solvent extraction in the soxhlet apparatus using n-Hexan. The extracts of the leaves were analyzed by gas chromatography and GC/MS system. Thirteen compounds were characterized for the essential oil from the Medlar's leaves. The results showed that the main fatty acid was linolenic acid with percentages of 28.18 in the Medlar's leaves. Fourteen compounds were identified for essential oil from the Medlar’s fruit.The results of fatty acids analyzed showed that the main fatty acid was linoleic acid with percentages of 21 in the Medlar's fruit
本研究的目的是集中在伊朗枸杞叶和果实的有机化合物的化学成分(Savadkooh, Mazandaran)。采用溶剂萃取法在索氏装置中提取有机化合物。采用气相色谱和气相色谱/质谱联用系统对其提取物进行分析。从枸杞叶中提取的精油中鉴定出13种化合物。结果表明:枸杞叶中主要脂肪酸为亚麻酸,含量为28.18%;从枸杞果实中鉴定出14种化合物。脂肪酸分析结果表明,枸杞果实中主要的脂肪酸为亚油酸,其含量为21%
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引用次数: 0
Hydroxyl Radical: a Key Species in Atmospheric Reaction 羟基自由基:大气反应中的关键物质
Pub Date : 2011-04-30 DOI: 10.15866/IREBIC.V2I2.1512
S. Panda
Rapid industrialization and urbanization result in accumulation of verities of pollutants in the atmosphere which have significant detrimental effects on both biotic and abiotic components of the environment. One of the natural defence mechanisms for the removal of pollutants is the involvement of hydroxyl radical (.OH), a potent reactive oxygen species in the atmosphere. It is generated either through photo-dissociation reactions or through some photocatalytic reactions. It acts as a strong oxidant causing destruction or transformation of both organic and inorganic pollutants in the environment. However its presence in excess can cause degradation of lipid-protein complex of biomembranes and other biomolecules possibly through membrane lipid peroxidation
快速的工业化和城市化导致大气中各种污染物的积累,对环境的生物和非生物成分都产生了重大的有害影响。清除污染物的自然防御机制之一是羟基自由基(. oh)的参与,这是大气中一种有效的活性氧。它是通过光解离反应或一些光催化反应产生的。它作为一种强氧化剂,导致环境中有机和无机污染物的破坏或转化。但其过量存在可能通过膜脂过氧化作用导致生物膜脂蛋白复合物和其他生物分子的降解
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引用次数: 0
Coenzyme-Q10 Promotes Lipid Phases of High Molecular Mobility when Interacting with 1-palmitoyl-2-oleoyl-sn-glycerol-3-phosphatidylserine: a 13C and 31P Solid-State Nuclear Magnetic Resonance Study 辅酶q10与1-棕榈酰-2-油基-sn-甘油-3-磷脂酰丝氨酸相互作用时促进高分子迁移率的脂质相:13C和31P固态核磁共振研究
Pub Date : 2011-04-30 DOI: 10.15866/IREBIC.V2I2.1508
Carsten August Wilhelmsen, M. Jensen, W. Nerdal
Coenzyme Q10, CoQ10, or ubiquinone is composed of ten isoprene units and a quinoid moiety capable of taking part in redox reactions and its reduced form, ubiquinol, is a potent free radical scavenger in lipid membranes. In this study 0, 2, 4 and 10 mol% CoQ10 in 1-palmitoyl-2-oleoyl-sn-glycerol-3-phosphatidylserine (POPS) bilayer have been prepared and 13C magic angle spinning (MAS) nuclear magnetic resonance (NMR) as well as static and MAS 31P NMR experiments have been carried out. The results show that CoQ10 added to the POPS bilayer will modify the properties of the lipid matrix and promote appearance of lipid phases of  higher molecular mobility than what is found in the corresponding pure POPS bilayer. The formation of CoQ10 containing lipid phases of high molecular mobility in membranes can be important for the biological function of CoQ10
辅酶Q10, CoQ10或泛醌由十个异戊二烯单元和一个能够参与氧化还原反应的类醌部分组成,其还原形式泛醇是脂质膜中有效的自由基清除剂。本文制备了1-棕榈酰-2-油基-sn-甘油-3-磷脂酰丝氨酸(POPS)双分子层0、2、4和10 mol%辅酶q10,并进行了13C魔角旋转(MAS)核磁共振(NMR)、静态和31P核磁共振(MAS)实验。结果表明,与相应的纯POPS双分子层相比,添加到POPS双分子层中的CoQ10将改变脂质基质的性质,并促进具有更高分子迁移率的脂质相的出现。在膜中形成含有高分子迁移率的脂质相的辅酶q10对辅酶q10的生物学功能很重要
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引用次数: 1
Oxygen Production of Peroxomonosulphate Induced by Cobalt(II) 钴(II)诱导过一硫酸盐产氧的研究
Pub Date : 2011-02-28 DOI: 10.15866/IREBIC.V2I1.1504
M. Najafpour, W. Hillier, M. Lashgari, Davoud Matloubi
The oxygen production reaction between Co(II) and Oxone (2KHSO 5 ·KHSO 4 ·K 2 SO 4 ) at pH = 4.5 was studied. Oxygen production was seen to be a first order reaction in the presence of Co(II) and Oxone but the overall reaction order is second order. T he analysis of the result revealed Co(III) and sulphate radical as proposal intermediates in oxygen production reaction. The reaction was studied at five different temperatures and kinetic and activation parameters were determined and a mechanism for oxygen production was proposed. To determine to what extent water was the source of the evolved oxygen, H 2 18 O isotope-labelling experiments coupled with membrane inlet mass spectrometry (MIMS) were carried out
研究了Co(II)与Oxone (2khso5·khso4·k2so4)在pH = 4.5条件下的产氧反应。在Co(II)和Oxone存在的情况下,产氧是一级反应,但整个反应是二级反应。结果表明,Co(III)和硫酸盐自由基是产氧反应的主要中间体。在5种不同温度下对该反应进行了研究,确定了动力学参数和活化参数,并提出了产氧机理。为了确定水在多大程度上是演化氧的来源,进行了h218o同位素标记实验,并结合了膜入口质谱(MIMS)
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引用次数: 0
The Mannich Reaction in Imidazo [1,2-a] Pyridine Series Assisted by Microwave 咪唑[1,2-a]吡啶系微波辅助下的Mannich反应
Pub Date : 2011-02-28 DOI: 10.15866/IREBIC.V2I1.1506
O. Cheham, S. Ghezali, A. Derdor
A comparative studying for the preparation of new compounds in series Imidazo [1,2-a] pyridine via the Mannich reaction which was carried out. Mannich bases, 3 to 6, were synthesized under standard conditions (conventional heating) or microwave irradiation (MW), by action of secondary amines on 2-methyl imidazo [1,2-a] pyridine 1 in the presence of formaldehyde. The results show synthesis under different conditions, for the first time, the training side of Mannich bases of 7 dimer resulting from the condensation of two moles of compound 1 and a mole of formaldehyde with very variable yields. For compound 3, for example,it is about 100%. Our study shows, whenthat we are preparing the initial substrate under MW irradiation, the presence of a compound 2 of the same molecular weight in the trace
采用曼尼希反应对咪唑[1,2- A]吡啶系列化合物的制备进行了比较研究。在标准条件下(常规加热)或微波辐照(MW)下,仲胺在甲醛存在下作用于2-甲基咪唑[1,2-a]吡啶1,合成了曼尼希碱3 ~ 6。结果表明,在不同条件下,首次合成了由2摩尔化合物1和1摩尔甲醛缩合而成的7二聚体的曼尼希碱的训练侧,其产率变化很大。以化合物3为例,它大约是100%。我们的研究表明,当我们在毫瓦辐射下制备初始底物时,痕量存在相同分子量的化合物2
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引用次数: 0
A Case Study Concerning Physicochemical Characteristics and Purification Outputs of Oil Refinery Wastewater Treatment Station (Samir, Sidi Kacem, Morocco) 炼油厂污水处理站(摩洛哥西迪卡西姆萨米尔)理化特性及净化产量研究
Pub Date : 2010-12-31 DOI: 10.15866/IREBIC.V1I3.1501
A. Haidar, A. Saad, M. Fadli, A. Chaouch, A. Echchelh
For the purpose of the physicochemical characterization of  oil effluents of S.A.M.I.R oil Refinery, Sidi Kacem, Morocco and to exanimate the performance of its treatment station by the estimation of the purification outputs of its wastewater, we have evaluated for two years (2007-2008) on a monthly basis eleven physicochemical parameters upstream and downstream to this wastewater treatment station (wwts);with the exception of salinity, chloride and conductivity degree, the wide ranged statistical analysis (ACP) shows that purification operation is well carried for the rest of physicochemical variables, this avoid the contribution of such effluents to a dramatically water pollution if directly rejected in the receiving environment. The important finding of this study is that the main physicochemical characteristics of the treated water are proved compatible with the Moroccan oil refining industry standards
为了对摩洛哥Sidi Kacem的S.A.M.I.R炼油厂的石油流出物进行理化表征,并通过估计其废水的净化产量来确定其处理站的性能,我们在两年(2007-2008年)期间每月对该废水处理站(wwts)的上下游11个理化参数进行了评估;除了盐度、氯化物和电导率,大范围的统计分析(ACP)表明,净化操作很好地进行了其余的物理化学变量,这避免了这些流出物在接收环境中直接拒绝时对水污染的巨大贡献。本研究的重要发现是,经处理的水的主要物理化学特性符合摩洛哥炼油工业标准
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引用次数: 0
Electro-Optical, Spectroscopical and Morphological Properties of Ultraviolet Cured Polymer/Liquid Crystal Films 紫外光固化聚合物/液晶膜的电光、光谱和形态特性
Pub Date : 2010-12-31 DOI: 10.15866/IREBIC.V1I3.1498
D. Benaissa, L. Méchernène, A. Addad, U. Maschke
The electro-optical behavior of Polymer Dispersed Liquid Crystal (PDLC) films was studied to understand the relationship between the conditions of preparation in terms of the extent of curing, the morphology, and the response to an external electrical field. The PDLC films were prepared by phase separation of a diacrylate/nematic low molecular weight liquid crystal mixture induced by Ultraviolet (UV) curing as a function of irradiation dose. The polymerization/crosslinking process was monitored by Fourier Transform Infrared Spectroscopy (FTIR) in terms of the radiation dose and LC concentration. The conversion of double bonds of the acrylic monomer shows a rapid increase at low dose values followed by a plateau. The transmission vs voltage curves were investigated as a function of wavelength and sample thickness, and show low transmission in the off-state and high transmission in the on-state. The analysis was accomplished by a proper morphology consideration
研究了聚合物分散液晶(PDLC)薄膜的电光行为,以了解制备条件在固化程度、形貌和对外部电场响应方面的关系。以双丙烯酸酯/向列相低分子量液晶混合物为基材,在紫外线照射下进行固化,制备了PDLC薄膜。利用傅里叶变换红外光谱(FTIR)对聚合/交联过程进行了辐射剂量和LC浓度的监测。丙烯酸单体的双键转化在低剂量下迅速增加,随后出现平稳期。透射率与电压随波长和样品厚度的变化曲线表明,在关闭状态下透射率低,在打开状态下透射率高。分析是通过适当的形态学考虑完成的
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引用次数: 0
Static and Dynamic Mechanical Properties of Cross-Linked Poly (Tripropyleneglycoldiacrylate)/Liquid Crystal Blends 交联聚(三丙基乙二醇二丙烯酸酯)/液晶共混物的静态和动态力学性能
Pub Date : 2010-12-31 DOI: 10.15866/IREBIC.V1I3.1499
A. Berrayah, U. Maschke
This investigation reports on static and dynamic mechanical properties of cross-linked Poly(tripropyleneglycoldiacrylate) (Poly-TPGDA) networks, elaborated via radical polymerization processes induced by Ultraviolet (UV) radiation. The presence of low molecular weight liquid crystal (LC) molecules in the polymer matrix modifies the dynamic and static mechanical behavior of the obtained composite materials. The storage modulus decreases with increasing LC content in the temperature range from T=25°C to -15°C, due to the plasticizing effect induced by the presence of low molecular weight LC in the polymer matrix. In the case of polymer/LC blends with more than 30 weight (wt.)-% LC and for temperatures lower than -15°C, a reinforcement effect could be seen, leading to a change of the shape of the decreasing curves. This phenomenon interferes with the plasticizing effect which himself governs the whole mechanical behavior of the cured polymer/LC system. A sort of competition takes place especially for temperatures lower than -75°C, so that the storage modulus increases or remains constant between 20 and 60 wt.-% LC
本研究报告了交联聚(三丙基乙二醇二丙烯酸酯)(聚tpgda)网络的静态和动态力学性能,阐述了自由基聚合过程在紫外线(UV)辐射诱导下。低分子量液晶(LC)分子在聚合物基体中的存在改变了复合材料的动态和静态力学行为。在T=25°C至-15°C的温度范围内,由于低分子量LC在聚合物基体中的存在引起了塑化作用,存储模量随着LC含量的增加而降低。对于重量(wt.)-% LC大于30且温度低于-15℃的聚合物/LC共混物,可以看到增强效应,导致减少曲线的形状发生变化。这种现象干扰了塑化效应,而塑化效应本身决定了固化聚合物/LC体系的整体力学行为。在低于-75°C的温度下,会发生一种竞争,因此存储模量增加或保持在20至60 wt.-% LC之间
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引用次数: 0
Algal Biorefinery: a Road towards Energy Independence and Sustainable Future 藻类生物炼制:通往能源独立和可持续未来的道路
Pub Date : 2010-12-31 DOI: 10.15866/IREBIC.V1I3.1502
S. Khan, A. Rashmi
The most important renewable resource on this planet is biomass. As the value of biomass content is related to the chemical and physical properties of large molecules, the challenges for the future are to be found in a combination of the biological, physical and chemical sciences, to replicate an oil refinery with a biorefinery thus replacing finite non-renewable fossil resources with biorenewable biomass resources for the production of food, feed, fertilizer, fuel, energy, medicinal products, industrial chemical and related consumer product through the use of clean and green bioprocess technologies. Algal biorefineries offer significant potential for future supply of oils, protein, and carbohydrates for fuels and chemicals without impacting food supplies. The residual biomass from biodiesel production processes can be used potentially as animal and fisheries feed and after anaerobic digestion can be used as fertilizers in the form of compost. Even it could solve the problem of huge carbon emission from thermal power plant by recycling the carbon. The simple, direct method of greenhouse gas (GHG) mitigation is the removal of CO2 from stack gases, followed by long term sequestration of CO2 by microalgae ponds. Thus the microalgal biodiesel projects can qualify as clean development mechanism (CDM) projects and bring in additional income through the sale of certified emission reductions (CER). Microalgal biorefinery concept could become a highly distributed source of fuel oil, energy, feed, fertilizer and medicinal metabolites and perhaps make this world pollution free and leap towards sustainable development
这个星球上最重要的可再生资源是生物质。由于生物质含量的价值与大分子的化学和物理性质有关,未来的挑战在于结合生物、物理和化学科学,用生物精炼厂复制炼油厂,从而用生物可再生生物质资源取代有限的不可再生化石资源,用于生产食品、饲料、肥料、燃料、能源、医药产品。通过使用清洁和绿色的生物工艺技术生产工业化学品和相关消费品。藻类生物精炼厂在不影响食品供应的情况下,为未来的油、蛋白质和碳水化合物燃料和化学品供应提供了巨大的潜力。生物柴油生产过程中产生的剩余生物质可以用作动物和渔业饲料,经过厌氧消化后可以用作堆肥形式的肥料。它甚至可以通过回收碳来解决火力发电厂巨大的碳排放问题。减少温室气体(GHG)的简单、直接的方法是从烟囱气体中去除二氧化碳,然后由微藻池长期封存二氧化碳。因此,微藻生物柴油项目有资格作为清洁发展机制(CDM)项目,并通过出售经认证的减排量(CER)带来额外收入。微藻生物炼制概念可以成为高度分布的燃料油、能源、饲料、肥料和药用代谢物的来源,可能使这个世界无污染,向可持续发展飞跃
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引用次数: 10
期刊
International Review of Biophysical Chemistry
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