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Catalytic Oxidation of Cyclopentanol with N-Bromophthalimide n -溴酞酰亚胺催化氧化环戊醇的研究
Pub Date : 2019-01-01 DOI: 10.20431/2349-0403.0602004
Ankita Saraf, S. Singh, A. Dwivedi
NBP is a potential oxidizing agent, versatile in nature on hydrolysis produces HOBr reacting species extensively used in the oxidation of alcohols,1 benzhydrols,2 amino acids,3 hydroxy acids4 etc., whereas PTA a Keggin type anionic catalyst due to its thermal stability and acidity finds commendable position in Inorganic chemistry and is of academic importance in national and international laboratories. The kinetic oxidative studies of several organic compounds viz. aromatic alcohols,5 benzyl alcohols,6 involving PTA have been investigated. Cyclopentanol is a monohydric cyclic alcohol, shows a variety of reactions with different number of oxidants KBrO3,7 NCP,8 QDC,9 NBA,10 CAT11, Ce(IV)12, Ru(III)13. However, there is no report available on the possible reaction mechanism or its selectivity under special condition with NBP spectrophotometrically. Hence this has prompted authors to undertake the task of kinetic investigation.
NBP是一种潜在的氧化剂,在水解过程中具有多用途,可产生HOBr反应物质,广泛用于醇类、1个苯甲醇、2种氨基酸、3种羟基酸等的氧化,而PTA是一种Keggin型阴离子催化剂,由于其热稳定性和酸性,在无机化学中占有重要地位,在国内和国际实验室中具有重要的学术意义。对芳香族醇、5种苄基醇、6种含PTA的有机化合物的氧化动力学进行了研究。环戊醇是一种一元环醇,与不同数量的氧化剂KBrO3、7 NCP、8 QDC、9 NBA、10 CAT11、Ce(IV)12、Ru(III)13发生多种反应。然而,目前还没有报道用NBP分光光度法测定其可能的反应机理或在特殊条件下的选择性。因此,这促使作者承担动力学研究的任务。
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引用次数: 0
Review of Extraction Techniques Extraction Methods: Microwave, Ultrasonic, Pressurized Fluid, Soxhlet Extraction, Etc 提取技术综述:微波提取、超声波提取、加压流体提取、索氏提取等
Pub Date : 2019-01-01 DOI: 10.20431/2349-0403.0603002
Komal Patel, Namrata Panchal, Pradnya Ingle
In Extraction the mixture of substances is dissociated, by dissolving each component with one or other solvents which yields two phases – Raffinate Phase (rich in Feed Solvent) and Extract Phase (rich in Solute) [1]. When the Relative Volatility is 1 the separation of the components in the mixture is not possible by Distillation and when relative Volatility is Greater than 1 Extraction method is used for separation of the components. Also, when the Distillation Method used is too expensive, Extraction process is opted [2]. The basic Block Diagram for Extraction process is given in the Fig1.
在萃取中,物质的混合物被解离,通过用一种或另一种溶剂溶解每一组分,产生两相——萃液相(富含饲料溶剂)和萃取相(富含溶质)[1]。当相对挥发度为1时,不能用蒸馏法分离混合物中的组分,当相对挥发度大于1时,采用萃取法分离组分。当蒸馏法成本过高时,可采用萃取法。图1给出了提取过程的基本框图。
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引用次数: 10
Biodegradability Features of Fluoxetine as a Reference Compound for Monitoring the Activity of Activated Sludges in Drug Biodegradation Studies 氟西汀作为药物生物降解研究中活性污泥活性监测参考化合物的生物降解特性
Pub Date : 2019-01-01 DOI: 10.20431/2349-0403.0601003
Y. Martín-Biosca, L. Escuder-Gilabert, M. Pérez-Baeza, Maria Jos Medina-Hernndez
Biodegradability assays are designed to test a chemical substance as the sole carbon source in a mixed inoculum [3]. The OECD ready biodegradability tests (RBTs) are used as screening methods to provide information about of the potential persistence of chemicals under most environmental conditions [4]. This risk parameter depends on the chemical structure of the compound as well as on the conditions under which the degradation process takes place. Drugs biodegradability studies are currently a priority in environmental studies [5-10]. This is due to their extensive use with a continuous release into the environment and the subsequent impact.
生物可降解性试验是设计用来测试化学物质作为混合接种体中唯一的碳源。经合组织现成的生物降解性试验(RBTs)被用作筛选方法,以提供关于化学品在大多数环境条件下的潜在持久性的信息[b]。这一危险参数取决于化合物的化学结构以及降解过程发生的条件。药物生物降解性研究是当前环境研究的重点[5-10]。这是由于它们的广泛使用和持续释放到环境中以及随后的影响。
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引用次数: 2
Phyto-Chemical Study of the Roots of Adiantum Lunulatum Burn 半月蕨根的植物化学研究
Pub Date : 2019-01-01 DOI: 10.20431/2349-0403.0606001
Sheeraz Ahmad Wagay, M. A. Kaloo
The plant Adiantum lunulatum-Burn 1 , belongs to natural order Polypodiaceae. It is commonly known as kali jhant in Hindi, Hansraj in Bombay and Hansavati in south India. It is reported to be useful for getting relief from fever and also for curing erysipelas. The dried whole plant has been used as a medicine for bronchitis and cough. It is used in bleeding diseases, burning sensation, erysipelas, epileptic fits, dysentery, strangury and elephantiasis. Few studies have been undertaken till date to substantiate its pharmacological activities such as antibacterial, antifungal, antioxidant, hypotensive etc. The plant is distributed throughout in northern India, in most places of south India and very general on western side in plains and lower slopes of India. In view of its so important medicinal values, the amino acids composition of its roots were studied.
本植物为水龙花科天然目。它通常被称为印地语中的kali jhant,孟买的Hansraj和印度南部的Hansavati。据报道,它对缓解发烧和治疗丹毒是有用的。整个干燥的植物已被用作支气管炎和咳嗽的药物。用于出血性疾病,烧灼感,丹毒,癫痫发作,痢疾,奇异和象皮病。迄今为止,很少有研究证实其具有抗菌、抗真菌、抗氧化、降血压等药理作用。该植物分布在整个印度北部,在印度南部的大部分地方,在印度西部的平原和较低的斜坡上非常普遍。鉴于其重要的药用价值,对其根的氨基酸组成进行了研究。
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引用次数: 0
Specifications of Exhausted Olive Pomace as an Energy Source: A Statistical Approach 废弃橄榄渣作为能源的规格:一种统计方法
Pub Date : 2019-01-01 DOI: 10.20431/2349-0403.0601002
K. Tawarah
The olive oil industry is a seasonal agricultural activity in countries having the climate of the Mediterranean basin. Ripe olive fruits are harvested for two main reasons. They can be processed to yield pitted or un-pitted table olives or pressed to generate olive oil. In all cases there are by-products that need to be managed in a proper way to avoid their negative impacts on the environment. According to previous statistics covering the 2014-2016 period, about 176,000 olive trees were planted in Jordan [1,2].The main reason for the growing interest in planting olive trees is to produce olive oil and table olives in sufficient amounts to cope with the needs of the growing population in Jordan and to improve the income of many families. For example, in 2014 the self-sufficiency ratios of preserved olives and olive oil were estimated to be 114.3 and 103.4 %, respectively [3]. Recent statistics indicate that the number of olive trees in Jordan was 11.848 million trees [1]. In 2015 and 2014 olive harvest seasons, 156,639 and 118,215 tons of olive fruits were used for oil production, respectively. For the 2015 harvest season, 62.32 % of the pressed fruits was a harvest of the northern region of Jordan, while those harvested from central and southern regions were 26.23 and 11.45 %, respectively. These percentages are in accord with the geographical distribution of the number of trees in these regions [4].There are four types of olive mills in Jordan. Based on their oil extraction method, the four types are: the traditional press mill, the two-phase mill, the two-and-half-phase mill, and the three-phase mill. The most common type is the three-phase olive mills [5].Currently, the olive oil production is handled by 128 olive mills with regional distribution of 70%, 22%, and 8% in northern, central, and southern regions of Jordan, respectively. An input output analysis of the olive mills used in Jordan was reported [5]. The quantity and quality of the produced liquid and solid by-products depend on the type of the olive mill used for olive oil extraction [5]. For example, the percentage of moisture content of the fresh solid residue was estimated to be 26.15-28.25,48.30-52.17, and 54.6158.99 % for traditional mills, three-phase mills, and two-phase mills, respectively [5]. Other characteristics of the raw olive mill solid residue such as the content of residual fatty material, mineral content (ash), polyphenols, total carbon, and the carbon/ nitrogen ratio were also found to depend on the type of the olive mill [5].The four types of olive mills also have different rates for generating the Abstract: Samples of exhausted olive pomace were prepared from six slurry and sun-dried agglomerated raw olive pomace samples via Soxhlet hexane extraction treatment. For the case of exhausted olive pomace, the replicates of the measured percentages of carbon, hydrogen, nitrogen, ash, calculated oxygen, and the values of the gross and net calorific values were subjected
橄榄油产业是地中海盆地气候国家的季节性农业活动。采摘成熟的橄榄果主要有两个原因。它们可以加工成去核或未去核的橄榄,也可以压榨成橄榄油。在所有情况下,都有需要以适当方式管理的副产品,以避免它们对环境的负面影响。根据此前2014-2016年的统计,约旦种植了约17.6万棵橄榄树[1,2]。人们对种植橄榄树越来越感兴趣的主要原因是生产足够数量的橄榄油和食用橄榄,以满足约旦不断增长的人口的需求,并提高许多家庭的收入。例如,2014年腌制橄榄和橄榄油的自给率估计分别为114.3%和103.4%[3]。最近的统计数据显示,约旦的橄榄树数量为1184.8万棵[1]。在2015年和2014年的橄榄收获季节,分别有156639吨和118215吨橄榄果实用于制油。2015年收获季节,约旦北部地区收获了62.32%的压榨水果,而中部和南部地区分别收获了26.23%和11.45%。这些百分比与这些地区树木数量的地理分布是一致的[4]。约旦有四种橄榄磨坊。根据其榨油方法,有四种类型:传统压榨机、两相磨机、两相半磨机和三相磨机。最常见的类型是三相橄榄磨[5]。目前,橄榄油生产由128家橄榄磨坊处理,分别分布在约旦北部、中部和南部地区,分别占70%、22%和8%。有报道对约旦使用的橄榄磨坊进行了投入产出分析[5]。所产生的液体和固体副产物的数量和质量取决于用于橄榄油提取的橄榄油磨机的类型[5]。例如,传统磨机、三相磨机和两相磨机的新鲜固体残渣含水率分别为26.15-28.25、48.30-52.17和54.6158.99%[5]。原始橄榄磨固体残渣的其他特征,如残余脂肪物质含量、矿物含量(灰分)、多酚、总碳和碳/氮比,也取决于橄榄磨的类型[5]。摘要:采用索氏己烷萃取法,对6种橄榄果渣原料进行浆料和干燥处理,制备了废橄榄果渣样品。对于用完的橄榄渣,对其碳、氢、氮、灰分的测量百分比、计算出的氧以及总发热量和净发热量的数值进行了全面的统计分析。统计分析结果以总体平均值的95%置信区间报告。在干燥基础上,统计分析的数值结果为:C、H、N、灰分、O、总发热量和净发热量分别为49.230±0.817 %、5.888±0.148 %、1.397±0.199 %、1.797±0.176 %、40.716±0.486 %、20.069±0.635 MJ/Kg和18.709±0.605 MJ/Kg。将这些结果与前驱体生橄榄渣的结果进行比较,表明废橄榄渣富含含氮和含氧化合物。一项关于使用橄榄渣作为家庭供暖中高价煤油和柴油的廉价替代品的成本分析表明,每吨燃烧后的橄榄渣可节省260美元。
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引用次数: 0
Comparative Studies of the Biosorption of Heavy Metals (Zinc and Lead) using Tea Leaves (Cammelia Sinensis) and Tea Fibre as Adsorbents 茶叶与茶纤维吸附重金属(锌、铅)的比较研究
Pub Date : 2019-01-01 DOI: 10.20431/2349-0403.0609003
E. Etim, G. Ukpong, E. Ekpenyong
Heavy metals as described by Barrera et al., 2006 are elements whose density is equal to or greater than 6.0 g/cm e.g Lead (Pb), mercury (Hg), cadmium (Cd) and arsenic (As).They have for long been used by man in building materials, as medicine, as pigments or as additives for petrol (Hylander and Meili, 2003), (Järup, 2003). Researchers later proved that heavy metalsgenerally poses a great deal of problems to mankind due to its presence in the environment at concentrations above threshold(Seker et al., 2008).Anthropogenic activities such as industrial effluents, mining, smelting, manufacture of explosives, metal plating, domestic effluents, leaching and run-offs from garbage are responsible for the risen cases of these toxic elements in the environment(Trueby, 2003). and the danger associated to the presence of these heavy metals have been attributed to bioconcentration and bioaccumulation in the food web in different locations (Nussey, 1998) enhanced by their ability to be transported to a distance usually by water(Bradl, 2005). Heavy metal pollution of the environment is now one of the most serious environmental problems worldwide which calls for ways of remediation because they are acutely and exceedingly toxic, indestructible (non-biodegradable) and they bioaccumulates thereby causing different health complications e.g. lead poisoning damages the kidney, liver, brain, reproductive systems and even the nervous systems (Naiya et al., 2009). Also, excess ingestion of zinc can lead to microcytosis, impaired immune response, neutropenia and hypocupremia, (Appelo and Postma, 2007).
Barrera等人在2006年所描述的重金属是指密度等于或大于6.0 g/cm的元素,例如铅(Pb)、汞(Hg)、镉(Cd)和砷(as)。它们长期以来一直被人类用于建筑材料、药物、颜料或汽油添加剂(Hylander and Meili, 2003), (Järup, 2003)。研究人员后来证明,由于重金属在环境中的浓度超过阈值,通常会给人类带来很多问题(Seker etal ., 2008)。工业废水、采矿、冶炼、炸药制造、金属电镀、家庭污水、浸出和垃圾径流等人为活动是造成环境中这些有毒元素增加的原因(Trueby, 2003年)。与这些重金属存在相关的危险归因于不同地点食物网中的生物浓缩和生物积累(Nussey, 1998),而它们通常通过水进行远距离运输的能力增强了这些危险(Bradl, 2005)。重金属污染环境现在是世界范围内最严重的环境问题之一,需要采取补救措施,因为它们具有急性和极大的毒性,不可破坏(不可生物降解),它们的生物积累从而引起不同的健康并发症,例如铅中毒损害肾脏,肝脏,大脑,生殖系统甚至神经系统(Naiya等人,2009)。此外,过量摄入锌可导致小细胞增多、免疫反应受损、中性粒细胞减少和低铜血症(Appelo和Postma, 2007)。
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引用次数: 0
Determination of Physicochemical Properties, Heavy Metals and Pesticide Residues of Honey Samples Collected From Walmara, Ethiopia 埃塞俄比亚瓦尔马拉蜂蜜理化性质、重金属及农药残留测定
Pub Date : 2019-01-01 DOI: 10.20431/2349-0403.0607004
Deressa Kebebe, Alemayehu Paulos, Ermias A. Haile
Bee honey is syrupy and viscous substance that produced by honeybees from the nectar of flowers or from the secretion of living parts of plants, in which honeybees transform through enzymatic activity and store it in wax structures called honeycombs until maturation (Adenekan, 2010, Awad and Elgornazi, 2016) should be safe for all consumers and pollinators. It has been used by humans since ancient times in various foodstuffs and drinks as a sweetener and flavoring (Kowsalya, 2012, Omoya et al, 2014).It has also medicinal and therapeutic effects (Eyobel et al., 2017).
蜂蜜是由蜜蜂从花蜜或植物活体部分的分泌物中产生的糖浆和粘性物质,蜜蜂通过酶活性将其转化并将其储存在称为蜂巢的蜡状结构中直到成熟(Adenekan, 2010, Awad和Elgornazi, 2016),对所有消费者和传粉者都是安全的。自古以来,它就被人类用于各种食品和饮料中,作为甜味剂和调味剂(Kowsalya, 2012, Omoya et al, 2014)。它还具有药用和治疗作用(Eyobel et al., 2017)。
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引用次数: 1
Evaluation of Chemical Properties of Post-Harvest Soil of Maize as Affected by Application of Organic Manure of Diverse Sources Along with Urea 不同来源有机肥配施尿素对玉米收获后土壤化学性质的影响
Pub Date : 2019-01-01 DOI: 10.20431/2349-0403.0610001
M. K. Khalil, Muhammad Owais Khan, Waqar Ali, Mukhtiar Ali, Shuja Ur, R. Qureshi, Farooq Ishaq
Appropriate fertilizer use leads to increased crop yields and high crop recovery of the applied nutrients. Some elements may be hazardous to soil as well as environment if used in extreme quantities in various forms, i.e. nitrates and phosphates. Efficient fertilization is therefore important in ensuring crops attain maturity within specific growing seasons(Okalebo, 1987).Effectiveness of fertilizers therefore depends on the chemical and physical properties, rate and method of application, soil and climatic conditions and the crop species grown (Mokwunye and Bationo, 2002). In recent years, there has been an increased use of high mineral fertilizers, mainly for economic reasons. Examples of inorganic fertilizers used include50%Urea, diammonium phosphate (DAP) and triple super phosphate (TSP) fertilizers (Smalling et al., 1997).
适当施用肥料可提高作物产量和作物对施用养分的高回收率。某些元素如果以各种形式大量使用,即硝酸盐和磷酸盐,可能对土壤和环境有害。因此,有效施肥对于确保作物在特定生长季节达到成熟是重要的(Okalebo, 1987)。因此,肥料的有效性取决于化学和物理性质、施用速率和方法、土壤和气候条件以及种植的作物品种(Mokwunye和Bationo, 2002年)。近年来,高矿质肥料的使用有所增加,主要是出于经济原因。所使用的无机肥料包括50%尿素、磷酸二铵(DAP)和三超磷酸盐(TSP)肥料(Smalling等人,1997年)。
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引用次数: 0
The Formation of Ethylene Glycol from Methanol–Formaldehyde Solutions 甲醇-甲醛溶液生成乙二醇的研究
Pub Date : 2019-01-01 DOI: 10.20431/2349-0403.0610003
M. M. Silaev
These facts stimulate development of new, energetically efficient ethylene glycol synthesis technologies. A possible one is radiation-chemical synthesis using a dual-purpose heterogeneous nuclear reactor in which the graphite moderator is replaced with a methanol–formaldehyde mixture and the heat carrier is steam flowing past fuel elements. A technological analysis of this system demonstrated that, at a reactor thermal power of 2.5 GW, it is possible to profitably manufacture 80 thousand tons of ethylene glycol per year along with producing 677 MW electric power.
这些事实刺激了新的、节能的乙二醇合成技术的发展。一种可能的方法是使用双重用途的非均质核反应堆进行辐射化学合成,其中石墨慢化剂被甲醇-甲醛混合物取代,热载体是流经燃料元件的蒸汽。对该系统的技术分析表明,在反应堆热功率为2.5吉瓦的情况下,每年可以生产8万吨乙二醇并产生677兆瓦的电力。
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引用次数: 0
Enzyme Catalyzed Study of Some Unsaturated Acids by N-Bromoisonicotinamide - A Kinetic Approach n -溴异烟酰胺酶催化某些不饱和酸的动力学研究
Pub Date : 2019-01-01 DOI: 10.20431/2349-0403.0608001
Aparna Prajapati, A. Dwivedi, S. S. Parihar
Micelles are enzyme catalysts, which are complex mixture of organic compounds mostly polymers treated as surfactant. The hydrophobic and electrostatic forces in presence of CTAB influence the rates of several oxidation reactions. The enzyme catalysis possesses midway properties between homogeneous and heterogeneous catalysis. It is also called as micro heterogeneous catalyst. Aggregates of these micelles in CMC range are responsible for altering the rate of reaction in aqueous solution which is extremely temperature dependent.
胶束是酶的催化剂,它是有机化合物的复杂混合物,主要是聚合物作为表面活性剂。CTAB存在时的疏水性和静电力影响了几种氧化反应的速率。酶催化具有介于均相催化和多相催化之间的性质。又称微多相催化剂。这些胶束在CMC范围内的聚集体负责改变水溶液中的反应速率,这是非常依赖于温度的。
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引用次数: 1
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International Journal of Advanced Research in Chemical Science
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