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Estimation of metformin Drug for the Diabetes Patients by Simple,Quick and Cheap Techniques within the Formation of Colored Charge Transfer Complexes

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光谱学与光谱分析 2018年第11期38卷 3622-3630页

作者： Omar B.Ibrahim El-Sayed A.manaaa m.m.AL-majthoub ahm ed m.Fallatah Abdel majid A.Adam mha m.Alatibi Jehan Y.A l-Humaidi moamen S.Refat Department of Chemistry Faculty of ScienceTaif UniversityAl-HaweiahP.O.Box 888Zip Code 21974TaifSaudi Arabia Department of Chemistry Faculty of Applied Medical ScienceTaif Unive rsityKSA Nuclear materials Authority El-MaadiEgypt Department of Chemistry College of SciencePrincess Nourah bint Abdulrahman UniversityRiyadh 11671KSA Department of Chemistry Faculty of SciencePort Said UniversityPort SaidEgypt

metformin(met)is a drug developed for the treatment of patients with typeⅡ ***,met estimation in pharmaceutical formulations and human fluids has gained a growing *** extend requisite data that can be used to assessment of met quantitatively based on charge-transfer(CT)complexation,the present study describes the synthesis and characterization of CT complexes that formed between drug met and the organicπ-acceptors picric acid(PA),chloranilic acid(CLA),chloranil(CHL),7,7',8,8'-tetracyanoquinodimethane(TCNQ),and dichlorodicyanobenzoquinone(DDQ).The properties of the formed CT complexes were investigated by elemental,spectral(UV-visible,IR,and Raman spectroscopies),thermal(TG)and morphological(SEm)*** results indicated that the complexation of met with either PA or CLA acceptors occurs through proton transfer interaction,whereas its complexation with CHL,TCNQ,or DDQ acceptors occurs through n→π*interaction.

关键词： metformin Anti-diabetic drug Charge-t ransfer complex Acceptor Solution study

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Comparative investigation of the free radical scavenging potential and anticancer property of Diospyros blancoi(Ebenaceae)

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Asian Pacific Journal of Tropical Biomedicine 2016年第5期6卷 410-417页

作者： muhammad Ali Khan mahbubur Rahman Nazmul Sardar Saiful Islam Arman Badrul Islam Jahangir Alam Khandakar mamunur Rashid Golam Sadik ahm Khurshid Alam Department of Pharmacy Bangabandhu Sheikh Mujibur Rahman Science and Technology University Department of Pharmacy University of Rajshahi Drugs and Toxins Research Division Bangladesh Council of Scientific and Industrial Research Product Development and Validation Department Square Pharmaceutical Limited Laboratory of Genetics Graduate School of BiostudiesKyoto University

Objective: To investigate the comparative effects of Diospyros blancoi(Ebenaceae)leaves(DBL), root bark(DBRB) and stem bark(DBSB) on free radicals and ***: The polyphenol contents, antioxidant and free radical scavenging properties were determined using standard spectrophotometric methods. Cytotoxicity and anticancer activities were performed on brine shrimp nauplii and Ehrlich ascite carcinoma cells, ***: Among the extracts, DBSB showed the highest total antioxidant capacity and reducing capacity on ferrous ion. Based on 1,1-diphenyl-2-picrylhydrazyl and hydroxyl radical scavenging activities, DBSB showed(95.760 ± 0.343)% and(67.460 ± 2.641)%scavenging with IC50of(3.10 ± 0.17) and(50.00 ± 3.11) mg/m L, respectively. The IC50 values of standard butylated hydroxytoluene and catechin(CA) for 1,1-diphenyl-2-picrylhydrazyl and hydroxyl radicals were(8.50 ± 0.25) and(75.00 ± 0.14) mg/m L,respectively suggesting that DBSB had a significant(P DBRB > CA > ***, the phenolic [(139.91 ± 3.924) mg gallic acid equivalent/g] and flavonoid contents[(412.00 ± 16.70) mg catechin equivalent/g)] of DBSB were higher than that of other extracts. In addition, the DBSB showed the moderate cytotoxic and anticancer ***: Our results indicate that Diospyros blancoi stem bark had the significant highest antioxidant and free radical scavenging properties as well as moderate anticancer ***, we assume that the anticancer activity of this plant can be, at least in part, attributed to its content in phenolic compounds as well as its significant free radical scavenging properties.

关键词： Diospyros blancoi Free radicals Polyphenols Antioxidant Cytotoxicity Anticancer

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一种经氟化和热处理在双壁碳纳米管上生成缺陷的方法(英文)

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催化学报 2014年第6期35卷 864-868页

作者： Hiroyuki muramatsu Kazunori Fujisawa Yong-Il Ko Kap-Seung Yang Takuya Hayashi morinobu Endo Cheol-min Yang Yong Chae Jung Yoong ahm Kim Faculty of Engineering Shinshu University 4-17-1 Wakasato Nagano 380-8553 Japan School of Polymer Science and Engineering Chonnam National University 77 Yongbong-ro Buk-gu 500-757 Gwangju Korea Institute of Carbon Science and Technology Shinshu University 4-17-1 Wakasato Nagano 380-8553 Japan Institute of Advanced Composite materials Korea Institute of Science and Technology Chudong-ro 92 Bongdong-eup Wanju-gun Jeonbuk 565-905 Korea

Nanoscale defects in the outer tube to preserve the electrical and optical features of the inner tube can be engineered to exploit the intrinsic properties of double walled carbon nanotubes (DWCNTs) for various promising applications. We demonstrated a selective way to make defects in the outer tube by the fluorination of DWCNTs followed by the thermal detachment of the F atoms at 1000 °C in argon. Fluorinated DWCNTs with different amounts of F atoms were prepared by reacting with fluorine gas at 25, 200, and 400 °C that gave the stoichiometry of CF0.20, CF0.30, and CF0.43, respectively. At the three different temperatures used, we observed preservation of the coaxial morphology in the fluorinated DWCNTs. For the DWCNTs fluorinated at 25 and 200 °C, the strong radial breathing modes (RBms) of the inner tube and weakened RBms of the outer tube indicated selective fluorine attachment onto the outer tube. However, the disappearance of the RBms in the Raman spectrum of the DWCNTs fluorinated at 400 °C showed the introduction of F atoms onto both inner and outer tubes. There was no significant change in the morphology and optical properties when the DWCNTs fluorinated at 25 and 200 °C were thermally treated at 1000 °C in argon. However, in the case of the DWCNTs fluorinated at 400 °C, the recovery of strong RBms from the inner tube and weakened RBms from the outer tube indicated the selective introduction of substantial defects on the outer tube while preserving the original tubular shape. The thermal detachment of F atoms from fluorinated DWCNTs is an efficient way to make highly defective outer tubes for preserving the electrical conduction and optical activity of the inner tubes.

关键词：双壁碳纳米管热处理氟化缺陷光学特性 F原子化学计量呼吸模式

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THERmOmECHANICAL mODELING OF POLYmER NANOCOmPOSITES BY THE ASYmPTOTIC HOmOGENIZATION mETHOD

THERMOMECHANICAL MODELING OF POLYMER NANOCOMPOSITES BY THE A...

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第二届亚洲功能材料与结构力学大会

作者： Yasser m.Shabana mechanical Design Department Faculty of Engineering-Mataria

＜正＞There is much current interest to incorporate nano-scale fillers into polymer matrices to achieve potentially unique *** to traditional microcomposites,nanocomposites have significant large ratio of interface area to volume that results in improved thermomechanical *** thermomechanical properties of polymer nanocomposites,to achieve the ever-increasing performance requirements,can be obtained by tailoring their *** this end,computational analyses of the relations between the thermomechanical properties,e.g.,yield strength,Young modulus,shear modulus,Poisson ratio and coefficient of thermal expansion,in different directions and the microstructures of polymer nanocomposites are *** asymptotic homogenization method （ahm） based on finite element analysis（FEA） is used to model the thermomechanical behaviors of different polymer nanocomposites with periodic *** effects of adding silica and rubber nanoparticles to epoxy resin as a polymer matrix are *** of the nano-particles which differ in volume fraction,material type,size and/or geometry are *** predictions of thermomechanical properties are compared with experimental data.

关键词： Nano-structures Polymer-matrix composites(PmCs) Thermomechanical Computational modeling

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无色素/低色素性黑色素瘤:临床和皮肤镜特征

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世界核心医学期刊文摘（皮肤病学分册） 2005年第1期1卷 3-5页

作者： Pizzichetta m.A. Talamini R. Stanganelli I. 张宪旗 Div. of med. Oncol. C Prev. Oncology Ctro. Riferimento Oncologico Aviano Via Pedemontana Occidentale 12 I 33081 Aviano Italy

Background: Amelanotic malignant melanoma is a subtype of cutaneous melanoma with little or no pigment on visual inspection. It may mimic benign and malignant variants of both melanocytic and nonmelanocytic lesions. Objectives: To evaluate whether dermoscopy is also a useful technique for the diagnosis of amelanotic/hypomelanotic melanoma (ahm) . methods: We conducted a retrospective clinical study of 151 amelanotic/hypomelanotic skin lesions from 151 patients with a mean age of 47 years (±17.5 SD). Digitized images of amelanotic/hypomelanotic skin lesions were converted to JPEG format and sent by e mail from the five participating centres. Lesions included 55 amelanotic/hypomelanotic nonmelanocytic lesions (AHNmL), 52 amelanotic/ hypomelanotic benign melanocytic lesions (AHBmL), and 44ahm, 10 (23%)-of which were nonpigmented, truly amelanotic melanomas (Am). The 44 ahm lesions were divided into thin melanomas (Tnm) ≤1 mm (29 cases) and thickmelanomas (Tkm) > 1mm (15 cases), according to the Breslow index. Five clinical features (elevation, ulceration, shape, borders and colour) as well as 10 dermoscopic criteria (pigment network, pigmentation, streaks, dots/globules, blue whitish veil, regression structures, hypopigmentation, leaf like areas, multiple grey bluish globules, central white patch) and eight vascular patterns (comma, arborizing, hairpin, dotted, linear irregular, dotted and linear irregular vessels, and milky red areas) were evaluated in order to achieve clinical and dermoscopic diagnoses. Statistical analyses were performed with the χ2-test and Fishers exact test, when appropriate. Results: The most frequent and significant clinical features for Tnm and Tkm were asymmetry and ulceration (the latter only for Tkm) compared with AHBmL. Irregular dots/globules (62%vs. 35%; P ≤0.03), regression structures (48%vs. 27%; P ≤0.03), irregular pigmentation (41%vs. 11%; P ≤0.03) and blue whitish veil (10%vs. 0%; P ≤0.03) were the most relevant dermoscopic criteri

关键词：黑色素瘤色素性恶性黑素瘤点状血管多形性叶状有显著性差异临床信息白膜图像转换

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