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Synthesis and Evaluation Catalytic Efficiency of Perovskite-Type Oxide Nanopowders in Removal of Bromocresol Purple from Aqueous Solution 钙钛矿型氧化物纳米粉体的合成及其对溴甲酚紫色脱除的催化效果评价
Pub Date : 2014-07-01 DOI: 10.12983/IJSRK-2014-P0340-0351
H. Tavakkoli, A. Ghaemi, Mastaneh Mostofizadeh
A1-xAxBO3 belongs to the perovskite oxides of the ABO3 structure. In this study, nanoparticles of La0.5Ca0.5FeO3 were fabricated by sol-gel citrate technique. A series of common analytical techniques were used to characterize the crystallinity, morphology, specific surface area, and grain size of the nanopowders. These properties were characterised by means of XRD, SEM, EDX and FTIR. The calculated particles size using the Scherrer's formula was about 20 nm. Moreover, the family of perovskite-type oxides could be considered as an adsorbent/catalyst material for the removal of dyes. This study has also investigated the efficiency of La0.5Ca0.5FeO3, as an adsorbent for removal of dye (Bromocresol Purple (BP)), from an aqueous solution. The adsorption studies were carried out at different pH values, various adsorbent dosages and contact time in a batch experiments. The kinetic studies indicate that the removal process obeys the Pseudo-first-order kinetic equation. Also, the isotherm evaluations reveal that the adsorption of BP by the nanoparticles follows the Langmuir model. In addition, this nanoparticle with good specific affinity towards dye molecules was a promising adsorbent for dye removal from natural water.
A1-xAxBO3属于ABO3结构的钙钛矿氧化物。本研究采用溶胶-凝胶柠檬酸盐法制备了La0.5Ca0.5FeO3纳米粒子。采用了一系列常用的分析技术来表征纳米粉体的结晶度、形貌、比表面积和晶粒尺寸。通过XRD、SEM、EDX和FTIR等手段对这些性能进行了表征。使用Scherrer公式计算出的颗粒尺寸约为20 nm。此外,钙钛矿型氧化物家族可以被认为是去除染料的吸附剂/催化剂材料。本研究还研究了La0.5Ca0.5FeO3作为吸附剂从水溶液中去除染料(溴甲酚紫色(BP))的效率。在不同的pH值、不同的吸附剂用量和接触时间下进行了批量吸附实验。动力学研究表明,去除过程符合准一级动力学方程。等温线分析表明,纳米颗粒对BP的吸附符合Langmuir模型。此外,该纳米颗粒对染料分子具有良好的特异性亲和力,是一种很有前途的天然水中染料吸附剂。
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引用次数: 5
Treatability Study of Partially Stabilized Leachate by Composite Coagulant (Prehydrolyzed Iron and Tapioca Flour) 复合混凝剂(预水解铁和木薯粉)处理部分稳定渗滤液的研究
Pub Date : 2014-07-01 DOI: 10.12983/IJSRK-2014-P0313-0319
N. M. Zin, H. A. Aziz, M. N. Adlan, A. Ariffin, M. Yusoff, I. Dahlan
s. Treatment of leachate before discharge is crucial to ensure the safety of the environment. Application of coagulation-flocculation in reducing pollutant from leachate was proven to be effective. However the use of chemical coagulant will indirectly affect the health of living organisms. To reduce the affect, substitution of the chemical coagulant with natural material can be used. Natural coagulant on leachate treatment was not as effective as chemical coagulant. However, the benefits of natural polymer as coagulants aids had been proven previously. Combination of chemical and natural coagulant as composite coagulant is able to simplify the process and offers many benefits. The aim of this study was to investigate the applicability of composite coagulant made from combination of prehydrolyzed iron (PHI) and tapioca flour (TF) on partially stabilized leachate and was evaluated through percentage removals of suspended solids (SS), colour, chemical oxygen demand (COD) and ammonia. A series of coagulation-flocculation jar test were carried out by considering the effect of dose and pH. Results indicated that at pH 5 and dose 0.2 g/L Fe, the percentage removals of SS, colour, COD and ammonia were 98%, 96%, 60% and 11%, respectively. The results demonstrated that PHITF can be a potential coagulant for the treatment of partially stabilized leachate.
5 .在排放前处理渗滤液,对确保环境安全至为重要。混凝-絮凝技术在降低渗滤液污染物中的应用效果良好。但化学混凝剂的使用会间接影响生物的健康。为减少影响,可采用天然材料替代化学混凝剂。天然混凝剂对渗滤液的处理效果不如化学混凝剂。然而,天然聚合物作为助凝剂的好处已经被证实。化学混凝剂与天然混凝剂结合作为复合混凝剂,可以简化工艺流程,具有诸多优点。本研究旨在探讨预水解铁(PHI)与木薯粉(TF)复合混凝剂对部分稳定渗滤液的适用性,并通过悬浮物(SS)去除率、颜色、化学需氧量(COD)和氨的去除率进行评价。考虑投加量和pH的影响,进行了一系列混凝罐试验。结果表明,当投加量为0.2 g/L Fe,投加量为pH 5时,对SS、色度、COD和氨的去除率分别为98%、96%、60%和11%。结果表明,PHITF可作为一种潜在的混凝剂处理部分稳定的渗滤液。
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引用次数: 16
Status of Exposure of Bio-Systems to Restricted Aluminium Phosphide Pesticide in Kano State, Nigeria 尼日利亚卡诺州生物系统暴露于限用磷化铝农药的状况
Pub Date : 2014-07-01 DOI: 10.12983/IJSRK-2014-P0306-0312
Adejumo Isaac Oluseun, O. A. Durojaiye, Adedeji Israel Ajibade, O. S. Idowu
Insect pests are one of the major organisms that are responsible for reduction in quality, germination potential and quantity of maize grains as well as seeds in storage. The aim of this study was to assess the types, sources of chemicals used to preserve maize in Nigeria as well as to ascertain the technical know-how of handling these chemicals among maize merchants. The study was conducted in Kano State of Nigeria. Four local government areas which are Kura, Rogo, Garun-Malan, and Rano were selected at random from the state and from the each local government areas, two villages were selected at random. Fifty respondents were chosen at random from the two villages to make a total of 200 respondents in all. Information on the most commonly used maize preservative chemicals were obtained through structured questionnaires. The result of the survey indicated that the mean age ranged between 46-49%, modal age (38-56%), respondents with no formal education (19-40%), those with primary school education, quaranic education, secondary school and tertiary education ranged between 37-42%, 013%, 7-16%, and 10-20% respectively. Majority of the respondents are male (77-88%). The most commonly used maize storage pesticide was aluminium phosphide (42-52%). Lack of formal education among maize farmers/merchants is majorly responsible for misuse of pesticides in the study areas.
害虫是造成玉米籽粒和种子贮藏质量、萌发潜力和数量下降的主要生物之一。这项研究的目的是评估尼日利亚用于保存玉米的化学品的类型和来源,以及确定玉米商人处理这些化学品的技术诀窍。这项研究在尼日利亚卡诺州进行。从州中随机选择了库拉、罗戈、加伦-马兰和拉诺四个地方政府区域,从每个地方政府区域中随机选择了两个村庄。从两个村随机抽取50名回答者,共计200名回答者。通过结构化的问卷调查获得了关于最常用的玉米防腐化学品的信息。调查结果显示,调查对象的平均年龄为46-49%,模式年龄为38-56%,未受过正规教育的调查对象为19-40%,小学教育程度为37-42%,卫生教育程度为013%,中学和大学教育程度为7-16%,大学教育程度为10-20%。受访者以男性居多(77% -88%)。玉米贮藏农药最常用的是磷化铝(42-52%)。玉米农民/商人缺乏正规教育是研究地区滥用农药的主要原因。
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引用次数: 4
Do Metaphysical Beliefs Manipulate Moral Competency? A Study in the Context of Cultural Diversities, Involving Global Population 形而上学的信仰会操纵道德能力吗?涉及全球人口的文化多样性研究
Pub Date : 2014-06-23 DOI: 10.12983/IJSRK-2014-P0328-0339
Bipin P. Varghese, S. Raj
Morality is the faculty of the human mind that enables an individual to act according to what is "right" or stand for "truth" and exhibit moral behaviour. Moral competency is the measure of the consistency of moral behaviour and is influenced by various psycho-social, geo-political, biological and environmental factors. Metaphysical beliefs and religio-spiritual affiliation are some known psycho-social factors that play a major role in shaping the morality in course of moral development and socialization of an individual. The present study attempts to explore the influence of basic metaphysical beliefs like faith in God, Afterlife, and belief in the influence of present life on afterlife; on moral competency. The present study conducted on N=415 samples from across the world and diverse cultures reveals that metaphysical beliefs influence moral competency to a significant extent.
道德是人类思维的一种能力,它使个人能够根据“正确”或代表“真理”行事,并表现出道德行为。道德能力是衡量道德行为一致性的标准,受到各种社会心理、地缘政治、生物和环境因素的影响。形而上学信仰和宗教精神归属是在个体道德发展和社会化过程中对道德形成起重要作用的社会心理因素。本研究试图探讨基本的形而上信仰的影响,如对上帝的信仰、对来世的信仰、对今生对来世的影响的信仰;关于道德能力。本研究对来自世界各地和不同文化的N=415个样本进行了研究,发现形而上学信仰在很大程度上影响了道德能力。
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引用次数: 1
Effects of Poultry Manure and NPK Fertilizer on Growth and Yield of Garden Eggs (Solanum Melongena) in a Sandy Soil in Ghana 家禽肥和氮磷钾肥对加纳沙地花园茄生长和产量的影响
Pub Date : 2014-06-01 DOI: 10.12983/IJSRK-2014-P0257-0264
A. A. Khalid, H. O. Tuffour, M. Bonsu, T. Adjei-Gyapong, A. Abubakar, I. Boateng, Caleb Melenya, Pearl Kpotor
Field experiment was conducted at the experimental field of the Department of Horticulture, KNUST, Kumasi, Ghana to test the effects of poultry manure (PM) and NPK fertilizer on the growth and yield of garden eggs (Solanum melongena) in a sandy soil. There were five treatments with five replications. The experiment was laid in Randomized Complete Block Design. Data were collected on the following crop parameters: Plant height, leaf area index and yield. The parameters increased with increase in the rate of PM application. The mineral fertilizer on sole application did not show any significant improvement in any of the parameters. Poultry manure integrated with NPK fertilizer was found to effectively improve the growth and yield of garden eggs.
在加纳库马西KNUST园艺系试验田进行了家禽粪(PM)和氮磷钾(NPK)肥对沙质土壤中花园茄(Solanum melongena)生长和产量的影响。有5个处理,5个重复。试验采用随机完全区组设计。收集了以下作物参数的数据:株高、叶面积指数和产量。这些参数随PM施用量的增加而增加。单施矿肥对各指标均无显著改善。禽粪配施氮磷钾肥能有效提高园蛋的生长和产量。
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引用次数: 11
Biomonitoring of Heavy Metal Pollution at Mount Abu (Rajasthan, India) using Riccia Billardieri Mont. & Nees Ex Gottsche, Lindenb. & Nees (Bryophyta: Hepaticae) 利用Riccia Billardieri Mont对印度拉贾斯坦邦阿布山重金属污染进行生物监测。& Nees Ex Gottsche, Lindenb。苔藓植物:肝门
Pub Date : 2014-06-01 DOI: 10.12983/IJSRK-2014-P0277-0284
A. Alam, S. Vats, V. Sharma
In current effort the level of selected atmospheric pollutants viz. S, Cu, Cd, Zn, Pb and Co was projected in samples of the common thalloid liverwort Riccia billardieri Mont. & Nees ex Gottsche, Lindenb. & Nees, from Mount Abu, (Rajasthan, India). Concentration of studied elements in plant tissue for R. billardieri was reported in the order of S> Zn> Pb> Cu> Cd>Co, while in substrate it was Zn> Pb> Cu> Cd> S> Co. Quantitative analysis of these elements in vegetative thalli of R. billardieri and the substrate showed a remarkable increase in metallic content during winter, which reveals the significance of this thalloid liverwort as an effective biological sink for metal pollutants present in the soil and air.
在目前的努力中,选定的大气污染物,即S, Cu, Cd, Zn, Pb和Co的水平,预测了普通菌体肝草的样品。& Nees ex Gottsche, Lindenb。& Nees,来自阿布山(印度拉贾斯坦邦)。研究元素在毛毛菜植物组织中的含量顺序为S> Zn> Pb> Cu> Cd>Co,在底物中的含量顺序为Zn> Pb> Cu> Cd> S> Co。对毛毛菜营养菌体和底物中金属元素含量的定量分析表明,毛毛菜营养菌体和底物中金属元素含量在冬季显著增加,揭示了毛毛菜作为土壤和空气中金属污染物的有效生物吸收库的意义。
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引用次数: 1
Assessing the Impact of Various Modes of Compaction on Tensile Property and Temperature Susceptibility of Asphalt Concrete 不同压实方式对沥青混凝土拉伸性能和温度敏感性影响的评估
Pub Date : 2014-06-01 DOI: 10.12983/IJSRK-2014-P0297-0305
S. Sarsam, M. Al-Obaidi
Compaction has a significant influence on the performance of asphalt mixtures. Insufficient compaction leads to premature permanent deformation, excessive aging, and moisture damage. The optimum asphalt content was 4.7 % using Marshall Compaction method. Bulk density of (2.351) gm/cc was obtained at OAC with 75 blows of Marshall compactive effort as a benchmark. Same density was achieved using the other two techniques, Gyratory and Roller compactive efforts. Results indicate that (75) blows of Marshall Compaction, are equivalent to (148) gyrations in Gyratory Compactor with pressure of (600) KPa and angle of gyration of (1.25°), and they are also equivalent to (56) cycles in Roller Compactor at load (5) KN and vibration with air supply of (10) bar, to obtain the same density. A total of 162 Marshal Size specimens were prepared, using Marshall, and Gyratory Compaction techniques, based on OAC of 4.7 % with additional asphalt contents of 0.5% above and below the optimum value. Twelve slabs of (40 x 30 x 6.35) cm were constructed using Roller Compactor and (6) core specimens were obtained for each slab. All specimens were subjected to the Indirect tensile strength (ITS) at 25oC, 40oC, and 60oC, temperature susceptibility (TS), and tensile strength ratio (TSR) test for the three methods of compaction. The main objective of this study is to evaluate impact on the tensile and temperature susceptibility of compacted hot mix asphalt concrete (HMA) when using three methods of compaction to achieve same density.
压实对沥青混合料的性能有重要影响。压实不足会导致过早永久变形、过度老化和受潮损坏。马歇尔压实法的最佳沥青掺量为4.7%。以75次马歇尔压实力为基准,在OAC下获得了(2.351)gm/cc的堆积密度。同样的密度是使用其他两种技术,旋转和辊压的努力。结果表明,在压力为600 KPa、旋转角为1.25°时,马歇尔压实机的75次冲击相当于旋转式压实机的148次旋转;在载荷为5 KN、振动为10 bar时,马歇尔压实机的75次冲击相当于滚筒压实机的56次循环,以获得相同的密度。采用马歇尔和旋转压实技术,在OAC为4.7%的基础上,添加沥青含量在最佳值上下0.5%的基础上,共制备了162个马歇尔尺寸试件。12块(40 x 30 x 6.35) cm的板坯采用压实机施工,每块板坯获得了6个岩心样本。分别进行了25℃、40℃和60℃下的间接抗拉强度(ITS)、温度敏感性(TS)和抗拉强度比(TSR)试验。本研究的主要目的是评估使用三种压实方法获得相同密度时对压实热拌沥青混凝土(HMA)的拉伸和温度敏感性的影响。
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引用次数: 3
Relationship between Emotional Exhaustion and Deviant Behaviors: Moderating Role of Big Five Personality Traits 情绪耗竭与偏差行为的关系:大五人格特质的调节作用
Pub Date : 2014-06-01 DOI: 10.12983/IJSRK-2014-P0285-0296
M. Golparvar, Safoura Dehghan, A. Mehdad
Personality traits are very important factors for research and theory and also for understanding various employees' behavior at work settings. The aim of the current inquiry was to investigate the relationships between emotional exhaustion and deviant behaviors with consider moderating effects of big five personality factors among employees of an public sector organization in Tehran, Iran. Using a simple random sampling method, a sample of two hundred and sixty five employees responded the emotional exhaustion, deviant behaviors, and big five personality traits questionnaires. The results revealed that extroversion, agreeableness and neuroticism moderate the relationship between emotional exhaustion and deviant behaviors. That is, in high extroversion and agreeableness, emotional exhaustion not significantly related to deviant behaviors, while in high neuroticism, emotional exhaustion positively and significantly related to deviant behaviors. Result of the current investigation showed that agreeableness and extroversion are two protective personality traits, and neuroticism is a personality risk factor in the relationship between emotional exhaustion and deviant behaviors.
人格特质是研究和理论的重要因素,也是理解员工在工作环境中的行为的重要因素。本研究旨在探讨伊朗德黑兰某公共部门雇员的情绪耗竭与越轨行为之间的关系,并考虑五大人格因素的调节作用。采用简单随机抽样的方法,对265名员工进行情绪耗竭、越轨行为和大五人格特征问卷调查。结果表明,外向性、亲和性和神经质对情绪耗竭与异常行为的关系有调节作用。即,在高外向性和亲和性条件下,情绪耗竭与越轨行为不显著相关,而在高神经质条件下,情绪耗竭与越轨行为显著正相关。本研究结果表明,在情绪耗竭与异常行为的关系中,亲和性和外向性是两种保护性人格特征,神经质是一种人格危险因素。
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引用次数: 4
Anti-Asthmatic and Cardioprotective Efficacy of Curcumin-A Review 姜黄素a的抗哮喘和心脏保护作用综述
Pub Date : 2014-05-01 DOI: 10.12983/IJSRK-2014-P0215-0223
M. Shahid, S. Khair-ul-Bariyah
Curcumin is a natural yellow pigment of turmeric. It is used for the treatment of diseases like Alzheimer's disease, chronic obstructive pulmonary disease, asthma, neuropathic pain, psoriasis, cancer and atherosclerosis. The present review aims to encompass the studies of curcumin as anti-asthmatic and cardioprotective. It has shown antiallergic properties by inhibiting histamine release from mast cells. It has been evidenced to have anti-inflammatory properties through inhibition of the NF-κB pathway. By its good radical scavenging activity, it has proved to be potent in treating cardiovascular diseases. However, its combination with other asthma and cardio medicines needs to be evaluated, especially; combination of herbal medicines or curcumin along with synthetic drugs can lead to positive outcomes. Moreover, derivatives of the drug can also show some promising results and more derivatives, like CNB001, must be synthesized and investigated to control airway epithelial cell function and asthma. Only little work has been done so far showing its effects on the pulmonary functions of smokers, so this area needs to be explored by further clinical trials.
姜黄素是姜黄中的一种天然黄色色素。它被用于治疗老年痴呆症、慢性阻塞性肺病、哮喘、神经性疼痛、牛皮癣、癌症和动脉粥样硬化等疾病。本文综述了姜黄素抗哮喘和心脏保护作用的研究进展。它通过抑制肥大细胞释放组胺而显示出抗过敏的特性。它已被证明通过抑制NF-κB途径具有抗炎特性。由于其良好的自由基清除活性,它已被证明是有效的治疗心血管疾病。然而,它与其他哮喘和心脏药物的组合需要评估,特别是;草药或姜黄素与合成药物的组合可以导致积极的结果。此外,该药物的衍生物也可以显示出一些有希望的结果,必须合成和研究更多的衍生物,如CNB001,以控制气道上皮细胞功能和哮喘。到目前为止,只有很少的研究表明它对吸烟者肺功能的影响,所以这一领域需要通过进一步的临床试验来探索。
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引用次数: 0
Soil Organic Carbon: Relating the Walkley-Black Wet Oxidation Method to Loss on Ignition and Clay Content 土壤有机碳:Walkley-Black湿氧化法与着火损失和粘土含量的关系
Pub Date : 2014-05-01 DOI: 10.12983/IJSRK-2014-P0249-0256
H. O. Tuffour, Israel Boateng Yeboah, M. Bonsu, T. Adjei-Gyapong, A. Abubakar, Caleb Melenya, Pearl Kpotor
Accurate estimation of soil organic carbon (SOC) is needed in many fields of science including ecology, soil science and global climate change. Loss on ignition method (LOI) of estimating SOC has been proposed as rapid, accurate and cheap method but it has some limitations. Walkley-Black method is also widely used. For this study, 12 soil samples from 0-15 cm depth were collected from four sites of the Crop Plantation Section of the Department of Crop and Soil Sciences, KNUST. The amount of SOC (%) estimated by LOI and W-B methods, and clay content were used to develop simple and multiple linear regression equations to describe their relationships. The highest estimate of SOC (3.28%) was produced by Loss on ignition method, whereas W-B gave lower estimates with 1.35% being the highest produced by this method. The coefficient of determination, R 2 , for the equations ranged from 0.35 to 0.84. Very weak relationship was observed between LOI and W-B as evidenced by R 2 value of 0.35. The clay content had a strong positive correlation (r = 0.70, p < 0.001) with LOI and gave R 2
土壤有机碳(SOC)的准确估算在生态学、土壤学和全球气候变化等诸多科学领域都有广泛的应用。燃失量法作为一种快速、准确、廉价的评估荷电状态的方法被提出,但存在一定的局限性。Walkley-Black法也被广泛使用。在本研究中,从南京理工大学作物与土壤科学系作物种植科的四个站点收集了12个0-15 cm深度的土壤样本。利用LOI法和W-B法估算的有机碳含量(%)与粘土含量建立了简单和多元线性回归方程来描述它们之间的关系。燃烧损耗法得到的SOC值最高,为3.28%,而W-B法得到的SOC值较低,最高为1.35%。方程的决定系数r2在0.35 ~ 0.84之间。LOI与W-B之间的关系非常弱,r2值为0.35。粘土含量与LOI呈显著正相关(r = 0.70, p < 0.001), r为2
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引用次数: 5
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International Journal of Scientific Research in Knowledge
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