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Effect of Ripening Stages on Basic Deep-Fat Frying Qualities of Plantain Chips

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Journal of Agricultural Science and Technology(A) 2013年第5期3卷 341-348页

作者： ogan Mba Jamshid Rahimi Michael Ngadi Department of Bioresource Engineering Macdonald Campus of McGill University Lakeshore Road Ste-Anne-de-Bellevue QuebecH9X3V9 21111 Canada

Plantains （Musa paradisiaca L.） are a major food staple in West Africa and are cooked in various forms. The objective of this work was to evaluate the frying characteristics of plantains at different stages of ripening. The plantains used in the study were at the unripe stage through four different ripening stages. The samples were peeled and sliced into 2 mm thickness and blanched in hot water at 70 ℃ for 3 min. The slices were then deep flied in canola oil at 180 ℃. The result showed that ripening stage significantly affected moisture loss and fat absorption profiles of the plantain chips. Fully ripened plantain absorbed up to 34% （db） oil during 4 min frying, much higher than unripe plantain. The oil uptake and moisture loss during frying of the plantain chip samples were modelled using 1st order kinetics. The kinetic parameters including rates of moisture loss and oil uptake varied according to the different stages of ripening. Ripening had a significant effect on the colour lightness （L） of the chips. Similarly, the redness （a）, the yellowness （b） and textural characteristics were significantly affected by ripening stage.

关键词： Plantain ripening plantain chips deep-frying oil uptake moisture loss kinetics.

Corrosion Inhibition of Aluminium in Gas and Acid Media by Some Chalcone-Based N-(3-Aminopropyl)Imidazoles: TD-DFT-Based FMO, Conceptual DFT, QTAIM and EDA Studies

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Computational Chemistry 2021年第1期9卷 37-63页

作者： Fritzgerald Kogge Bine Stanley Numbonui Tasheh Nyiang kennet.Nkungli Research Unit of Noxious Chemistry and Environmental Engineering Department of Chemistry Faculty of Science Univer-sity of Dschang Dschang Cameroon Department of Chemistry Faculty of Science The University of Bamenda Bamenda Cameroon

The efficacy and mode of action of five chalcone-based imidazole derivatives as corrosion inhibitors of aluminium metal in gas-phase and acidic medium have been investigated herein via quantum chemical calculations. Dispersion-corrected DFT (DFT-D3) and time-dependent DFT (TD-DFT) calculations were performed at PBE0/def2-TZVP//PBEh-3c and CAM-B3LYP/def2- TZVP levels of theory, respectively. Conceptual DFT, the quantum theory of atoms-in-molecules (QTAIM) and local energy decomposition (LED) analyses have been performed. The LED analysis was performed at the coupled-cluster singles and doubles with perturbative triples (CCSD(T))/def2-SVP level of theory. Frontier molecular orbital energy gaps calculated using the TD-DFT method are found to lie in the range 3.574 - 4.444 eV, indicative of good adsorption and corrosion inhibition efficacies of the investigated molecules. The interactions between aluminium and the inhibitor molecules studied are found to be energetically favorable, owing to negative computed interaction energy values. Furthermore, QTAIM analysis revealed metal-carbon, metal-oxygen and metal-nitrogen interactions in the inhibitor-aluminium complexes, which are predominantly electrostatic in character, according to LED analysis results. Calculated proton affinities (PAs) have revealed the anticorrosion potentials of the investigated inhibitors in acidic medium, with a noticeable dependency on temperature within the range 273.15 - 343.15 K.

关键词： Density Functional Theory Anticorrosion Inhibitor-Aluminium Interactions Quantum Theory of Atoms-in-Molecules Local Energy Decomposition Analysis

拉斯海马在古代印度洋贸易线上的地位——对拉斯海马诸考古遗址的观察

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故宫博物院院刊 2022年第10期246卷 63-75,140页

作者：翟毅张然王光尧 Derek kennet.王琎(摄影) 吴伟(摄影) 故宫博物院杜伦大学考古系不详

拉斯海马酋长国是阿拉伯联合酋长国的组成国之一,地处波斯湾入海口南岸,扼印度洋与波斯湾的交通要冲。14世纪以后,该地区成为了新忽鲁谟斯王国的组成部分,为伊朗南部的霍尔木兹岛提供物资支持,与该岛有着密切的联系。随着拉斯海马农业... 详细信息

拉斯海马酋长国是阿拉伯联合酋长国的组成国之一,地处波斯湾入海口南岸,扼印度洋与波斯湾的交通要冲。14世纪以后,该地区成为了新忽鲁谟斯王国的组成部分,为伊朗南部的霍尔木兹岛提供物资支持,与该岛有着密切的联系。随着拉斯海马农业、手工业和远洋贸易的兴盛,当地成为了古代西印度洋重要的港口。本文以20世纪拉斯海马地区考古发掘成果为线索,对其在波斯湾与印度洋的海洋贸易的历史变迁加以总结,并通过对该地区出土中国陶瓷的初步梳理,探讨这一地区在古代印度洋国际贸易线上的地位。

关键词：拉斯海马波斯湾考古古代社会经济中国外销瓷

DFT and TD-DFT Study of Bis[2-(5-Amino-[1,3,4]-Oxadiazol-2-yl) Phenol](Diaqua)M(II) Complexes [M = Cu, Ni and Zn]: Electronic Structures, Properties and Analyses

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Computational Chemistry 2015年第3期3卷 29-44页

作者： Nyiang kennet.Nkungli Julius Numbonui Ghogomu Ludovid Ngouo Nogheu Shridhar Ramachandra Gadre Laboratory of Noxious Chemistry and Environmental Engineering Department of Chemistry Faculty of Science University of Dschang Dschang Cameroon Department of Chemistry Indian Institute of Technology Kanpur Kanpur India

Ground state geometries, spectral (IR and UV-Vis) properties, analysis of frontier molecular orbitals (FMOs), natural bond orbital (NBO) analysis and molecular electrostatic potential (MEP) surfaces of three transition metal complexes [Cu(AOYP)2(OH2)2] (A), [Ni(AOYP)2(OH2)2] (B) and [Zn-(AOYP)2(OH2)2] (C), have been studied theoretically by the Density Functional Theory (DFT) and Time-Dependent Density Functional Theory (TD-DFT) methods. AOYP is the oxadiazole ligand 2-(5-amino-[1,3,4]-oxadiazol-2-yl)phenol. The geometries of these complexes were initially optimized using two basis sets: LAN2DZ and a generic basis set, the latter of which was selected for subsequent analysis. The stability of the complexes arising from intramolecular interactions and electron delocalization was estimated by natural bond orbital (NBO) analysis. The NBO results showed significant charge transfer from lone pair orbitals on the AOYP donor atoms O19, O21, N15 and N36 to central metal ions in the complexes, as well as to the benzene and oxadiazole rings. The electronic spectrum of (A) showed bands at 752 and 550 nm mainly attributable to ligand-to-metal charge transfer (LMCT) transitions, and a band at 446 nm assigned to a d-d transition. The electronic spectrum of (B) consisted of bands at 540, 463 and 395 nm mainly due to d-d transitions. Calculated electronic bands for (C) occurred at 243, 238 and 235 nm, arising from intraligand charge transfer (ILCT) transitions within AOYP. A good agreement in terms of band positions was found between experimental and calculated absorption spectra of the complexes.

关键词： DFT TD-DFT AOYP Complexes NBO Analysis MEP Surfaces

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富裕的家庭

中学生英语(高中版) 2010年第26期 41-44页

作者： Eddie ogan 李荷卿

我永远忘不了1946年的复活节。那一年我14岁,妹妹奥丝12岁,姐姐达琳16岁。我们和母亲住在一起。我们四个人都知道该如何生存。爸爸在五年前去世了,没给妈妈留下一文钱,只给她留下了七个正在上学的孩子。

关键词：美元捐款 over

Elevated preoperative neutrophil-tolymphocyte ratio may be associated with decreased overall survival in patients with metastatic clear cell renal cell carcinoma undergoing cytoreductive nephrectomy

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Asian Journal of Urology 2016年第1期3卷 20-25页

作者： Yoram S.Baum Dattatraya Patil Jonathan H.Huang Stephanie Spetka Mersiha Torlak Peter T.Nieh Mehrdad Alemozaffar kennet. ogan Viraj A.Master Department of Urology Emory University School of MedicineAtlantaGAUSA

Objective:Inflammatory serum markers have proven to be a powerful predictive tool of patient prognosis in cancer treatment for a wide variety of solid organ malignancies,predominantly in the context of localized *** this study we evaluated the preoperative neutrophil-to-lymphocyte ratio(NLR)as a predictive tool in patients with metastatic clear cell renal cell carcinoma(RCC).Methods:Sixty-four patients with metastatic clear cell RCC undergoing nephrectomy were *** patients with preoperative NLR were included for survival *** were categorized into high and low NLR score determined by plotting the NLR ROC *** analysis was ***:Median age was 60.8 years(38.2-81.2).Median follow-up time was 8.1 months(0.1-106.3).Fuhrman grade distribution was:2(3.1%)grade 1,6(9.4%)grade 2,24(37.5%)grade 3 and 32(50.0%)grade *** NLR score was 3.5(1.4-31.0).NLR4 was associated with decreased overall survival compared toNLR<4(p=0.017).Multivariable survival analysis showed NLR4 as an independent predictor of survival(Hazard ratio(HR)2.41,95%CI 1.05-5.50,p=0.03).Conclusion:Elevated preoperative NLR is associatedwith poor prognosis in patients withmetastatic kidney *** NLR is a useful tool,which can predict prognosis,stratify patients for postoperative surveillance,and help guide decisions for therapy.

关键词： Renal cancer Neutrophil-tolymphocyte ratio Cytoreductive nephrectomy Prognosis

Structural, Spectral (IR and UV/Visible) and Thermodynamic Properties of Some 3d Transition Metal(II) Chloride Complexes of Glyoxime and Its Derivatives: A DFT and TD-DFT Study

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Computational Chemistry 2016年第4期4卷 119-136页

作者： Ludovid Ngouo Nogheu Julius Numbonui Ghogomu Desire Bikele Mama Nyiang kennet.Nkungli Elie Younang Shridhar Ramachandra Gadre Department of Chemistry Faculty of Science University of Dschang Dschang Cameroon Department of Chemistry Faculty of Science University of Douala Douala Cameroon Department of Inorganic Chemistry Faculty of Science University of Yaounde I Yaounde Cameroon Department of Chemistry Indian Institute of Technology Kanpur Kanpur India

Metal complexes bearing vic-dioxime ligands have been extensively used as analytical and biochemical reagents, and are well-known antimicrobial agents. Herein is reported a DFT study on the molecular structures, thermodynamic properties, chemical reactivity and spectral properties of some 3d metal(II) chloride complexes of glyoxime. The functionals B3LYP and CAM-B3LYP have each been used in conjunction with LANL2DZ for the metal(II) ions (Fe2+, Co2+, Ni2+ and Cu2+) and the Poplestyle basis set 6-31G+(d,p) for the rest of the elements, to perform theoretical calculations. The metal complexation abilities of the glyoxime ligands studied in this work have been evaluated on the basis of metal-ligand binding energies. These ligands were found to have high affinities towards Ni(II) and Fe(II) ions, and all complexation reactions were found to be thermodynamically feasible. Ligand-to-metal electron donations in the complexes studied have been revealed by natural population analysis. The fully optimized geometries of the complexes have adopted square planar structures around the central metal ions. On the basis of orbital composition analysis, the UV-Vis electronic absorption bands of these molecules have been attributed mainly to MLCT, LMCT and d-d electronic transitions involving metal-based orbitals.

关键词： Glyoxime Complexes DFT Binding Energy Electronic Absorption