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The ZnIn2S4 (ZIS) thin films have been successfully developed from a homogeneous toluene solution of dithiocarbamate complexes of zinc and indium with formula [Zn(S2CNCy2)2(py)] (1) and [In(S2CNCy2)3].2py (2) via aerosol assisted chemical vapor deposition (AACVD) technique. Deposition experiments were carried out at 500oC in an inert atmosphere of argon gas on FTO substrate. The X-ray diffraction (XRD), X-ray photoelectron spectroscopy (XPS), field emission scanning electron microscopy (FESEM) and Raman spectroscopy have been used for the determination of phase purity, surface topography of th..read more
Umar Daraz, Tariq Mahmood Ansari, Shafique Ahmad Arain,..
- 04 May 2020
- Volume Detail: VOLUME 42, NO2, APR-2020
- Pages: 155
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Silica (SiO2) supported nickel oxide-copper oxide (NiO-CuO) composites were synthesized through alkoxide route of sol-gel process using tetraethyl ortthosilicate (TEOS), nickel nitrate hexahydrate and copper nitrate trihydrate as precursors. A series of different compositions were prepared varying NiO:CuO molar ratios keeping all other process parameters constant. The gels thus obtained were calcined at a moderate temperature i.e. 500ºC for one hour. The crystal structure and thermal stability of metal oxide particles embedded in silica matrix were studied using X-ray diffraction technique (XR..read more
Samreen Zahra, Dr. Narjis Naz, Dr. Muhammad Zia-ur-Rehm..
- 04 May 2020
- Volume Detail: VOLUME 42, NO2, APR-2020
- Pages: 164
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A novel, accurate, simple and selective LC-MS/MS method was developed and validated for the determination of metoprolol in human plasma. Due to structural resemblance Propranolol was selected as internal standard. Anti coagulant used was K2 EDTA. Metoprolol, used in the therapy and management of hypertension, myocardial infraction and other cardio vascular diseases. Liquid – liquid extraction technique with tert-butyl methyl ether was applied for the extraction of analyte from human plasma. Kromasil C18 column (5µ, 100 × 4.6 mm) with an isocratic mobile phase of 5mM Ammonium Formate pH 3.5 and..read more
Beludari Mohammed Ishaq, Lingareddygari Siva Sanker Red..
- 04 May 2020
- Volume Detail: VOLUME 42, NO2, APR-2020
- Pages: 171
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The effect of Cu2+, Ca2+, Mg2+and Zn2+ on the interaction between nitroglycerin and bovine serum albumin was investigated. The bimolecular quenching rate constant, the Stern-Volmer quenching constant, the binding constants and the number of binding sites were calculated in the absence and presence of Cu2+, Ca2+, Mg2+and Zn2+. The quenching constants of nitroglycerin to bovine serum albumin were increased in the presence of metal ions. Static quenching mechanism was also confirmed. The binding constants of nitroglycerin to bovine serum albumin were influenced by different metal ions. The enthal..read more
Chengman Bao, Jialian Wang, Xuehong Tong, Chunli Zhang,..
- 04 May 2020
- Volume Detail: VOLUME 42, NO2, APR-2020
- Pages: 180
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In this work, three-dimensional mesoporous MnO2, K/MnO2, Pt/MnO2 and K-Pt/MnO2 catalysts were prepared through hard-template method. The additional K/Pt had significantly improved the HCHO oxidation activity. The K-Pt/MnO2 catalyzed complete HCHO oxidation was achieved at 0℃ with space velocity (GHSV) at 50000 ml/(g·h). With the excellent catalytic performance, K-Pt/MnO2 exhibited a higher ratio of Oads(surface adsorbed oxygen)/Olatt(surface lattice oxygen) and Mn3+/Mn4+ ions than the other catalysts. Meanwhile, it was still stable after running a 70h reaction. Overall, the K-Pt/MnO2 was a pro..read more
Shengnan Guan, Wenzhi Li, Jianru Ma, Qingchuan Liu, Kun..
- 04 May 2020
- Volume Detail: VOLUME 42, NO2, APR-2020
- Pages: 188
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A copper(Ⅱ)-hesperetin complex formulated as [Cu(L)2(H2O)2]·H2O ("L" represented the ligand hesperetin) was synthesized using a novel ion-exchanging resin column method, based on the integration of the separation of hesperetin on hesperetin-loaded resins and the reaction of hesperetin with Cu2+ using CuCl2 as an eluent and reacting reagent. The feasibility of this new method was testified firstly. Results indicated the D296 macroporous strong basic anion exchange resin could effectively adsorb hesperetin and the saturated adsorption capacity was 143.5 mg per mL resin. The favorable concentrati..read more
Huan Wang, Boru Chen and Siming Zhu..
- 04 May 2020
- Volume Detail: VOLUME 42, NO2, APR-2020
- Pages: 204
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The gingerol presents the starting point of our work which aims to discover new inhibitors of the tyrosinase enzyme. Therefore, we have studied the activity of gingerol derivatives as inhibitors against mushroom tyrosinase based on the molecular docking.
Molecular docking studies were performed on a series of gingerol analogues retrieved from Zinc database (with 70% as similarity threshold). The gingerol analogues were docked within the active site region of mushroom tyrosinase (PDB: 2Y9X) using Molegro Virtual Docker V.5.0.
The results of molecular docking studies revealed that some analogues..read more
Sabrina. Benouis, Fouad. Ferkous, Khairedine. Kraim, Ah..
- 04 May 2020
- Volume Detail: VOLUME 42, NO2, APR-2020
- Pages: 214
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Verbascum L. species have been used since ancient times in traditional medicine thanks to their bioactive compounds. In this study, we evaluated the antioxidant activity and phenolic contents of ethanolic and acetonic extract of Verbascum glomeratum that collected from Denizli, Turkey. The antioxidant activity were evaluated by using various methods (β-carotene/linoleic acid, ferric reducing power assays (FRAP), radical scavenging assays of 2,2-diphenyl-1-picrylhydrazyl (DPPH) and 2'-azino-bis-3-ethyl benzthiazoline-6-sulphonic acid (ABTS), phoshomolibdenum methods) and total phenolic, flavono..read more
Çiğdem Aydin, Akgul Rakhimzhanova, Özge Kilinçarslan an..
- 04 May 2020
- Volume Detail: VOLUME 42, NO2, APR-2020
- Pages: 222
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BaTi0.97Zn0.01V0.01Ta0.01O3¬ sample was prepared using the conventional mixed oxide sintering route. The samples were characterized using X-ray diffraction, Raman spectroscopy, Scanning Electron Microscopy and Impedance spectroscopy. Structure of the sample was analyzed using Rietveld analysis which showed the formation of tetragonal symmetry. Raman spectroscopy was also in agreement with the XRD results, further indicating the ferroelectric signature in the sample. Electrical microstructure analyzed by impedance spectroscopy analysis revealed two electroactive regions in the sample, belonging..read more
Raz Muhammad, Sajid Ali, Yaseen Iqbal, Amir Khesro and ..
- 04 May 2020
- Volume Detail: VOLUME 42, NO2, APR-2020
- Pages: 228
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Nickel(II) complexes of the following Schiff base ligands derived from 4-(dimethylamino)benzaldehyde were synthesised: (Z)-1-(4-(dimethylamino)benzylideneamino)-propan-1-ol through condensation with 1-amino-propan-1-ol, (N1E,N2E)-N1,N2-bis(4-dimethylamino)benzylidene)benzene-1,2-diamine through condensation with benzene-1,2-diamine and 2-((4-dimethylamino)benzylidene)amino)phenol through condensation with 2-aminophenol. The synthesised Schiff bases and the resultant Ni(II) complexes were all isolated as crystals and characterized by melting point, elemental analysis, infrared spectroscopy, NMR..read more
Nighat Nawaz, Irshad Ahmad, Nizam M. Darwesh, Amjad Wah..
- 04 May 2020
- Volume Detail: VOLUME 42, NO2, APR-2020
- Pages: 238
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