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Emerging contaminants: Evaluation of degradable chelators towards enhancing cadmium phytoextraction efficiency of bioenergy crop grown on polluted soil

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Emerging Contaminants 2021年第1期7卷 139-148页

作者： Segun O.Oladele Blessing B.Oladele rasheedat ajala Bukola F.Dada Department of Agronomy Faculty of AgricultureAdekunle Ajasin University Akungba AkokoNigeria Department of Physics Radiation and Environmental Health UnitFederal University of Technology AkureNigeria Department of Crop Soil and Pest Management Federal University of Technology AkureNigeria

Exogenous application of chelators towards enhancing heavy metals extraction efficiency of bioenergy crop has received considerable attention in recent ***,little is known about optimal application rate,comparative evaluation of degradable versus non-degradable chelators and their impact on cadmium(Cd)speciation and uptake,physiological and biochemical activity of sweet sorghum grown under Cd *** chelators namely,Nitrilotriacetic acid(NTA),tetrasodium N,N-diacetate(TDA),Ethylenediamine tetraacetic acid(EDTA),iminodisuccinic acid(IDA)and control(CK)were applied and compared at rates of 2,5,and 10 mmol kg^(-1) towards augmenting phytoextraction efficiency of sweet sorghum for Cd remediation in a screen house *** showed that sweet sorghum augmented with TDA significantly(P<0.05)increased biomass,enhanced Cd uptake and accumulation when compared to EDTA at application rate of 2-5 mmol kg*** influenced Cd speciation via increasing acid-soluble,reducible,oxidizable,and residual fractions of Cd,thus increasing Cd *** and TDA increased proline concentrations,antioxidant enzymes and net photosynthetic activity rate(Pn)comparably to EDTA in sweet sorghum,thus enhancing stress tolerance and stabilizing photosynthetic ***,exogenous application of degradable TDA at 2-5 mmol kg^(-1) could be recommended as replacement for non-degradable EDTA in a chelate assisted approach towards augmenting bioenergy crop for phytoremediation of Cd polluted soil.

关键词： Phytoextraction Antioxidant enzymes Photosynthetic rate Stress tolerance Cadmium speciation

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Behavior and mechanism of pre-oxidation improvement on fluidization in the fluidized reduction of titanomagnetite

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International Journal of Minerals,Metallurgy and Materials 2024年第11期31卷 2458-2465页

作者： Haoyan Sun ajala Adewole Adetoro Zhiqiang Wang Qingshan Zhu State Key Laboratory of Mesoscience and Engineering Institute of Process EngineeringChinese Academy of SciencesBeijing 100190China School of Chemical Engineering University of Chinese Academy of SciencesBeijing 100049China Data Science AI modeling CentreUniversity of HullHull HU67RXUK

The direct reduction process is an important development direction of low-carbon ironmaking and efficient comprehensive utilization of poly-metallic iron ore,such as ***,the defluidization of reduced iron particles with a high metallization degree at a high temperature will seriously affect the operation of fluidized bed *** the pre-oxidation enhancing reduction and the particle surface modification of titanomagnetite,the behavior and mechanism of pre-oxidation improvement on fluidization in the fluidized bed reduction of titanomagnetite are systematically studied in this ***-oxidation treatment of titanomagnetite can significantly lower the critical stable reduction fluidization gas velocity to 0.17 m/s,which is reduced by 56%compared to that of titanomagnetite reduction without pre-oxidation,while achieving a metallization degree of>90%,Corresponding to the different reduction fluidization behaviors,three pre-oxidation operation regions have been divided,taking oxidation degrees of 26%and 86%as the *** on the particle surface morphology evolution in the pre-oxidation-reduction process,the relationship between the surface morphology of pre-oxidized ore and the reduced iron with fluidization properties is *** improving method of pre-oxidation on the reduction fluidization provides a novel approach to prevent defluidization by particle surface modification,especially for the fluidized bed reduction of poly-metallic iron ore.

关键词： fluidization direct reduction pre-oxidation titanomagnetite iron whisker

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The antiplasmodial effect of the extracts and formulated capsules of Phyllanthus amarus on Plasmodium yoelii infection in mice

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Asian Pacific Journal of Tropical Medicine 2011年第4期4卷 283-287页

作者： Tolulope O ajala Cecilia I Igwilo Ibrahim A Oreagba Oluwatoyin A Odeku Department of Pharmaceutics & Pharmaceutical Technology Faculty of PharmacyOlabisi Onabanjo University Department of Pharmaceutics and Pharmaceutical Technology Faculty of PharmacyUniversity of Lagos Department of Pharmacology College of MedicineUniversity of Lagos Department of Pharmaceutics and Industrial Pharmacy Faculty of PharmacyUniversity of Ibadan

Objective:To investigate the antiplasmodial activity of the extracts of Phyllanthus amarus(P. amarus) on Plasmodium yoelii(***)(a resistant malaria parasite strain used in animal stuthes) infection in ***:The aqueous and ethanol extracts of the whole plant of Phyllanthus amarus was administered to Swiss albino mice at doses of 200 mg/kg/day,400 mg/ kg/day,800 mg/kg/day and 1 600 mg/kg/day and the prophylactic and chemotherapeutic effect of the extracts against *** infection in mice was investigated and compared with those of standard antimalaria drugs used in the treatment of malaria parasite *** toxicity test was carried out in mice to determine the safety of the plant extract when administered orally. Results:The results showed that the extracts demonstrated a dose-dependent prophylactic and chemotherapeutic activity with the aqueous extracts showing slightly higher effect than the ethanol *** antiplasmodial effects of the extracts were comparable to the standard prophylactic and chemotherapeutic drugs used in chloroquine resistant Plasmodium infection although the activity depended on the dose of the extract *** extracts showed prophylactic effect by significantly delaying the onset of infection with the suppression of 79% at a dose of 1 600 mg/kg/***:The results obtained indicate that the extracts of the whole plant of *** possess repository and chemotherapeutic effects against resistant strains of *** in Swiss albino *** findings justify the use of the extract of *** in traditional medicine practice,for the treatment of malaria infections.

关键词： Antiplasmodial activity Phyllanthus amarus Plasmodium yoelli Artesunate/amodiaquine Pyrimethamine

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Response of multi-step compound pre-equilibrium reaction cross sections for the(p,n)reactions to forms of optical model parameters

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Nuclear Science and Techniques 2017年第10期28卷 65-70页

作者： Felix S.Olise Oludaisi I.Oladunjoye Afis ajala Sunday D.Olorunfunmi Hezekiah B.Oianiyi Department of Physics and Engineering Physics ObafemiAwolowo UniversityIle-Ife220005Nigeria

In furtherance to improving agreement between calculated and experimental nuclear data, the nuclear reaction code GAMME was used to calculate the multistep compound(MSC) nucleus double differential cross sections(DDCs) for proton-induced neutron emission reactions using the Feshbach-Kerman-Koonin(FKK) formalism. The cross sections were obtained for reactor structural materials involving ^(52)Cr(p, n)^(52)Mn,^(56)Fe(p,n)^(56)Co, and ^(60)Ni(p, n)^(60)Cu reactions at 22.2 MeV incident energy using the zero-range reaction mechanism. Effective residual interaction strength was 28 MeV, and different optical potential parameters were used for the entrance and exit channels of the proton-neutron interactions. The calculated DDCs were fitted to experimental data at the same backward angle of 150°, where the MSC processes dominate. The calculated and experimental data agree well in the region of pre-equilibrium(MSC) reaction dominance against a weaker fit at the lower emission energies. We attribute underestimations to contributions from the other reaction channels and disagreement at higher outgoing energies to reactions to collectively excited states. Contrary to the FKK multi-step direct calculations, contributions from the higher stages to the DDCs are significant. Different sets of parameters resulted in varying levels of agreement of calculated and experimental data for the considered nuclei.

关键词：反应截面光学势参数预平衡模型参数多步复合相互作用强度实验数据

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Thermochemical co-conversion of biomass-plastic waste to biochar:a review

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Green Chemical Engineering 2024年第1期5卷 31-49页

作者： Adewale George Adeniyi Kingsley O.Iwuozor Ebuka Chizitere Emenike Oluwaseun J.ajala Samuel Ogunniyi Kabir B.Muritala Department of Chemical Engineering Faculty of Engineering and TechnologyUniversity of IlorinIlorinP.M.B.1515Nigeria Department of Chemical Engineering Landmark UniversityOmu-AranKwara StateP.M.B.1001Nigeria Department of Pure and Industrial Chemistry Nnamdi Azikiwe UniversityAwkaP.M.B.5025Nigeria Department of Chemistry Federal University of TechnologyBosso CampusMinnaNiger StateP.M.B.65Nigeria

Biomass and plastics are two of the most common municipal solid wastes globally that have continuously placed a burden on the *** is therefore important that they are properly *** coconversion offers a valuable opportunity to recycle biomass and plastics simultaneously into biochar,which reduces the time and cost of recycling them individually while producing a material with a wide range of *** study is a review of published literature that discusses the thermochemical co-processing of biomass and plastic wastes into *** was observed that co-pyrolysis and co-hydrothermal carbonization are the most commonly utilized technologies for this *** characteristics of different biomass and plastics that have been thermochemically converted into biochar were *** properties of the resulting biochar are affected by the feedstock composition,pre-treatment and blending ratio,the reactor’s configuration,reaction temperature,and the presence of a *** studies found that treating the feedstocks separately resulted in a lower yield of biochar than processing them *** biochar created by this procedure has been used as a soil additive and as an adsorbent for water *** perspectives and suggestions,such as the necessity for some technical advancement,biochar’s economic benefits,improved government participation,and raised social awareness,were also *** factors have the potential to propel this field of study to great horizons.

关键词： Biomass Co-pyrolysis Plastic Thermochemical process Valorization

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抗坏血酸棕榈酸酯：特性、合成、包埋及应用综述

抗坏血酸棕榈酸酯：特性、合成、包埋及应用综述

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作者： Blessing Titilayo ajala 华南理工大学

学位级别：硕士

抗坏血酸棕榈酸酯,是一种抗坏血酸的酯衍生物,在食品工业中常称其为维生素C酯或维生素C棕榈酸酯。它以脂肪酶(固定化)或者硫酸作为催化剂,通过抗坏血酸与棕榈酸进行酯化反应合成。尽管它不是天然产物,但公认其安全,基本无细胞毒性。与... 详细信息

抗坏血酸棕榈酸酯,是一种抗坏血酸的酯衍生物,在食品工业中常称其为维生素C酯或维生素C棕榈酸酯。它以脂肪酶(固定化)或者硫酸作为催化剂,通过抗坏血酸与棕榈酸进行酯化反应合成。尽管它不是天然产物,但公认其安全,基本无细胞毒性。与丁基化羟基甲苯(BHT)及其衍生物、丁基化羟基苯甲醚(BHA)和叔丁基对苯二酚(TBHQ)等类似物相比,它是一种更为安全的选择。抗坏血酸在多种应用场景中大有益处,但其性质非常不稳定,因而限制了其应用。而抗坏血酸棕榈酸酯基本具有抗坏血酸的所有优势,并且稳定性相对更高。抗坏血酸棕榈酸酯因其亲脂性在各个行业中多有应用,尤其是作为抗氧化剂。抗坏血酸棕榈酸酯的生物活性还包括保护红细胞、通过其穿透能力输送抗坏血酸输到细胞中,以及提高铁的生物利用率。它在食品加工中还被用作安全的添加剂和防腐剂,其中主要是被用做脂质的抗氧化剂,防止含脂肪和油的食品变质。研究人员通过体内治疗认为抗坏血酸棕榈酸酯对癌症治疗有益,它可以减小小鼠的肿瘤大小并抑制癌细胞的增殖。研究还表明,它具有对抗皮肤炎症的潜力,并有助于药理学中的药物输送。它还可以与其他抗氧化剂如类胡萝卜素和生育酚结合使用。抗坏血酸棕榈酸酯的抗氧化机制已被探索。尽管不像抗坏血酸那样不稳定,但它在所有应用中也容易被氧化,在暴露在光线和高湿度下时会变色,在一些金属离子和蔗糖的存在下也会降解。封装是经过验证的有效解决方案,可以保持其稳定并确保其不会降解,该技术和封装材料已被详细探讨过。由于其亲脂性,它也被证明是纳米封装壳材料的潜在添加物。抗坏血酸棕榈酸酯被证明是食品工业中一种极具潜力的成分,不同行业已经对作为抗氧化剂的抗坏血酸棕榈酸酯进行了大量研究,但相比于化妆品和制药行业,其在食品工业中的潜在应用尚未得到充分探索,这使得许多事实和研究结果尚无定论。由于行业的焦点正逐渐转向天然添加剂,因此深入研究抗坏血酸棕榈酸酯,有利于最大限度地发挥其益处。

关键词：抗坏血酸棕榈酸酯抗氧化剂亲脂性稳定性抗氧化活性抗氧化机制包埋

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基于企业风险管理的银行效率研究：中国四大国有股份制商业银行实证分析

基于企业风险管理的银行效率研究：中国四大国有股份制商业银行实...

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作者： Idris olanrewaju ajala 北京交通大学

学位级别：硕士

论文从企业风险管理（ERM）如何满足与银行业务需要的角度,以中国四大银行为例,研究企业风险管理（ERM）对银行生产率的影响,以COSO模型为基础,讨论企业风险管理对银行生产率的影响途径。论文对银行管理人员（包括中高级工作人员）进行... 详细信息

论文从企业风险管理（ERM）如何满足与银行业务需要的角度,以中国四大银行为例,研究企业风险管理（ERM）对银行生产率的影响,以COSO模型为基础,讨论企业风险管理对银行生产率的影响途径。论文对银行管理人员（包括中高级工作人员）进行了问卷调查,并运用描述性统计和回归方程对问卷结果进行分析。实证结果表明,由于风险管理文化和意识已经深刻影响到各个层级,个人工作能力、审计有效性和监管与银行生产率之间存在长期关系,而行政管理同没有银行生产率之间没有表现出直接联系。论文研究表明,在银行业不断创新、银行决策者的理念和策略统一的预期下,中国四大银行可通过实行有效的风险管理机制提高生产率。论文对金融风险管理体系的组织结构及其技术和制度动因的讨论,拓展了金融风险管理的研究内容。

关键词：银行生产率风险企业 COSO CAS ISO FERMA

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Morphometric Indices and Enteroparasitic Infestation of <i>Clarias gariepinus</i>(Burchell, 1822) in a Tropical Reservoir

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Agricultural Sciences 2019年第10期10卷 1286-1297页

作者： Olumuyiwa Olasunmibo ajala Olatunde O. Fawole Department of Pure and Applied Biology Ladoke Akintola University of Technology Ogbomoso Nigeria

The study was carried out using 328 Clarias gariepinus specimens over a period of two years, from Oba reservoir (08°3'N to 08°12'N and 004°6'E to 004°12'E) Ogbomoso, Oyo State, Nigeria. Standard methods were used to determine length-weight relationship, condition factor, and enteroparasitic infestation of the fish in the reservoir. Generally, Fish growth was positively allometric, while infested male and female fishes had negative allometric growth. The general well-being of the male fish was better than that of the female fish. Smaller sized fishes were better adapted to the ecological conditions of the reservoir than the bigger fishes. Parasites recovered were two Nematodes (Procamallanus laevionchus, Paracamallanus cyathopharynx), three Cestodes (Anomotaenia sp. Monobothrium sp., Polyonchobothrium clariae), and one Acanthocephalan (Neoechinorhynchus rutili). Sex ratio was 1.3:1 (male: female). Parasitic prevalence and intensity in the fish were sex and season dependent. The effect of enteroparasites in the life of infested C. gariepinus was found to probably be a major factor responsible for the low percentage of good fit to the line of regression (R2) in females. Infestation also led to loss of weight in infested fishes and this affected morphometric values in which body weight was an index.

关键词： Allometric Clarias gariepinus Enteroparasites Infestation Morphometric

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3D-QSAR Topomer CoMFA Studies on 10 N-Substituted Acridone Derivatives

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Open Journal of Medicinal Chemistry 2012年第3期2卷 43-49页

作者： Adeayo O. ajala Cosmas O. Okoro Department of Chemistry Tennessee State University Nashville USA

Topomer CoMFA models have been used to optimize the potency of 15 biologically active acridone derivatives se- lected from the literature. Their 3D chemical structures were sliced into three acyclic R groups, to produce a fragment that is present in each training set. The analysis was successful with 3 as the number of components that provided the highest q2 results: q2 is 0.56, which is the cross-validated coefficient for the specified number of components, giving rise to 0.37 standard error of estimate (q2 stderr), and a conventional coefficient (r2) of 0.82, whose standard error of estimate is 0.24. These results provide structure-activity relationship (sar) among the compounds. The result of the To-pomer CoMFA studies was used to design novel derivatives for future studies.

关键词： Acridone Topomer Acyclic CoMFA Cross-Validated SAR

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Physical Growth Pattern of Settlements in a Traditional Region, Southwest Nigeria

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International Journal of Geosciences 2014年第11期5卷 1345-1360页

作者： Adewale Mukhtar Olayiwola Olayinka Akinsumbo ajala Johnson Adewale Sangodipe Department of Geography Obafemi Awolowo University Ile-Ife Nigeria

The study examined the growth pattern of settlements in Oke-Ogun area of Oyo State, Nigeria between 1984 and 2011;and predicted the future growth pattern of settlements in the study area. Both primary and secondary data were used for this study. Primary sources of data include Global Positioning System (GPS), Landsat TM and ETM+ imageries of 1984, 1990, 2000, and 2011. Secondary data included administrative map and population data of the study area. Descriptive statistics and geospatial technique were used to analyse the data collected. The results showed a random pattern of settlement distribution in the study area. Results revealed that settlements covered about 0.52% of the total land area in 1984;1.32% in 2000;and 3.78% in 2011. Whereas linear pattern of growth characterised the periods between 1984 and 1990;clustering, infilling, and fringes were the patterns of growth that characterised the periods between 1990 and 2011. The study predicted that, at an average 1.2% of annual growth rate, settlements will occupy about 44.37% of the total land area by 2031. The study concluded that settlements in the study area varied in the patterns of distribution;the area was dominated by indigenous settlements type with overconcentration of social and economic infrastructures in few centres.

关键词： Settlements Distribution Patterns Oke-Ogun Land Use Infrastructural Facilities Spatial Disparity Growth Pattern Landscape Transition Spatial Metrics

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