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Abdelrahman A. Dahy Eida S. Al-Farrag Nourah S. Al-Hokbany 《Journal of Coordination Chemistry》2016,69(6):1088-1099
This article presents a combined experimental and computational study of a new oxorhenium(V) complex of thiazolidine-2,4-dione (HTDO). The complex has been synthesized by direct reaction of NH4ReO4 with thiazolidine-2,4-dione in the presence of Na2S2O6 as a reducing agent. The complex [ReO(TDO)(H2O)3](S2O8) has been characterized by spectroscopy (FT-IR, NMR, UV-vis, mass), thermogravimetry, microanalysis, and HPL chromatography. The complex was geometrically optimized by DFT with B3LYP level of theory and satisfactory theoretical–experimental agreement was achieved for analysis of IR and NMR data of the complex. Additional information about binding between rhenium and oxo ligand in the complex has been obtained by NBO analysis. The antibacterial activity of the investigated complex has been tested and evaluated. 相似文献
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N. Momono T. Nakano A. Eida K. Chida Y. Miura M. Oda M. Ido 《Czechoslovak Journal of Physics》1996,46(Z3):1233-1234
The electronic specific heat Cel was studied at T≤10K on Ga- and Zn-doped La2−xSrxCuO4 (0.16≤x≤0.22). In pure La2−xSrxCuO4 (0.16≤x≤0.22), the Cel at T<Tc contains only a T2 component but no T-linear one, which is peculiar to a clean d-wave superconductor. Partial substitution of Ga or Zn for Cu
changes the T2-term of Cel into a quite different one described by the sum of a T-linear and a nearly T3 term. The coefficient of the T-linear term, γ, markedly increases with Zn-or Ga-content. The λ/λN vs. Tc/Tco relation for Zn-doped samples with x≥0.2 is in good agreement with the theoretical curve for resonant impurity scattering
in a d-wave superconductor, while those for Ga-doped samples and for Zn-doped samples with x<0.2 deviate slightly from the
theoretical curve. Such a deviation will be discussed in relation to the change in the magnetic properties of the present
system caused by impurity-doping. 相似文献
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Shingo Kanehira Masaaki Sakakura Yasuhiko Shimotsuma Masaaki Eida Kiyotaka Miura Kazuyuki Hirao 《Applied Physics A: Materials Science & Processing》2010,101(1):81-85
Phase control of Fe–Si amorphous thin film in micro area is demonstrated using femtosecond laser irradiation. A femtosecond
laser beam with a high repetition rate over 200 kHz and tightly focused through an objective lens promotes both crystallization
and phase transformation from an amorphous phase into crystalline β-FeSi2, α-FeSi2, or ε-FeSi phases. Formation of each crystalline phase is possible by changing the pulse energy or the scanning speed of the incident
laser beam. 相似文献
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Refat Mahfouz Eida Al-Frag M. Rafiq H. Siddiqui Waed Z. Al-kiali O. Karama 《Arabian Journal of Chemistry》2011,4(1):119-124
The aqua rhenium oxocomplex [ReO(OH)(H2O)4]2? (1) has been prepared and characterized by spectroscopy, thermogravimetry, and elemental analysis and its reactivity towards triphenylphosphine has been evaluated. Complex (1) acts as a catalyst precursor in the presence of molecular oxygen for the oxidation of PPh3 to OPPh3. This proceeds through complex intermediates like [Re(PPh3)n]3+ (2), and [ReO(PPh3)n]3+ (3). The newly prepared complex (1) was also employed as catalyst for catalytic oxidation of cyclohexane. The geometry of [ReO(OH)(H2O)4]2? has also been optimized in the singlet state by the DFT method with B3LYP level of theory. 相似文献
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Wedad A. Al-Onazi Amal M. Al-Mohaimeed Zainab M. Almarhoon Eida S. Al-Farraj Asma A. Alothman 《中国化学会会志》2020,67(1):125-134
A potentiometric method was used to determine the stability constants for the various complexes of copper(II) with carbamoylcholine chloride (C) drug as a ligand in the presence of some biorelevant amino acid constituents like glycine (Gly), alanine (Ala), valine (Val), proline (Pro), β-phenylalanine (Phe), S-methylcysteine (Met), threonine (Thr), ornithine (Orn), lysine (Lys), histidine (Hisd), histamine (Hist), and imidazole (Imz) as ligands (L). Stability constants of complexes were determined at 25°C and I = 0.10 mol/L NaNO3. The relative stability of each ternary complex was compared with that of the corresponding binary complexes in terms of Δlog K and % R.S. values. Cu(II) complexes of drug C were synthesized in 1:1 and 1:1:1 M ratios of copper to drug [Cu(C)(NO3)2] (1) and copper to drug to glycine[Cu(C)(Gly)(NO3)].NO3 (2), respectively. Glycine ternary complex with drug and copper [Cu(C)(Gly)(NO3)].NO3 was considered as representative amino acid. The complexes 1 and 2 were isolated and characterized using various physicochemical and spectral techniques. Both complexes 1 and 2 were found to have magnetic moments corresponding to one unpaired electron. The possible square planar and square-pyramidal geometries of the copper (II) complexes were assigned on the basis of electron paramagnetic resonance (EPR), thermogravimetric analysis (TGA), scanning electron microscopy (SEM), X-ray powder diffraction (XRPD), ultraviolet–visible (UV–Vis) and infrared (IR) spectral studies, and the discrete Fourier transform method from DMOL3 calculations. Antioxidant activities of all the synthesized compounds were also investigated. 相似文献
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Rakesh K. Sindhu Rishu Verma Twinkle Salgotra Md. Habibur Rahman Muddaser Shah Rokeya Akter Waheed Murad Sidra Mubin Parveen Bibi Safaa Qusti Eida M. Alshammari Gaber El-Saber Batiha Micha Tomczyk Hayder M. Al-kuraishy 《Molecules (Basel, Switzerland)》2021,26(17)
Breast cancer persists as a diffuse source of cancer despite persistent detection and treatment. Flavonoids, a type of polyphenol, appear to be a productive option in the treatment of breast cancer, because of their capacity to regulate the tumor related functions of class of compounds. Plant polyphenols are flavonoids that appear to exhibit properties which are beneficial for breast cancer therapy. Numerous epidemiologic studies have been performed on the dynamic effect of plant polyphenols in the prevention of breast cancer. There are also subclasses of flavonoids that have antioxidant and anticarcinogenic activity. These can regulate the scavenging activity of reactive oxygen species (ROS) which help in cell cycle arrest and suppress the uncontrolled division of cancer cells. Numerous studies have also been performed at the population level, one of which reported a connection between cancer risk and intake of dietary flavonoids. Breast cancer appears to show intertumoral heterogeneity with estrogen receptor positive and negative cells. This review describes breast cancer, its various factors, and the function of flavonoids in the prevention and treatment of breast cancer, namely, how flavonoids and their subtypes are used in treatment. This review proposes that cancer risk can be reduced, and that cancer can be even cured by improving dietary intake. A large number of studies also suggested that the intake of fruit and vegetables is associated with reduced breast cancer and paper also includes the role and the use of nanodelivery of flavonoids in the healing of breast cancer. In addition, the therapeutic potential of orally administered phyto-bioactive compounds (PBCs) is narrowed because of poor stability and oral bioavailability of compounds in the gastrointestinal tract (GIT), and solubility also affects bioavailability. In recent years, creative nanotechnology-based approaches have been advised to enhance the activity of PBCs. Nanotechnology also offers the potential to become aware of disease at earlier stages, such as the detection of hidden or unconcealed metastasis colonies in patients diagnosed with lung, colon, prostate, ovarian, and breast cancer. However, nanoformulation-related effects and safety must not be overlooked. This review gives a brief discussion of nanoformulations and the effect of nanotechnology on herbal drugs. 相似文献
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Hitesh Chopra Protity Shuvra Dey Debashrita Das Tanima Bhattacharya Muddaser Shah Sidra Mubin Samka Peregrine Maishu Rokeya Akter Md. Habibur Rahman Chenmala Karthika Waheed Murad Naeem Qusty Safaa Qusti Eida M. Alshammari Gaber El-Saber Batiha Farag M. A. Altalbawy Mona I. M. Albooq Badrieah M. Alamri 《Molecules (Basel, Switzerland)》2021,26(16)
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Mohd W. A. Khan Ahmed A. Otaibi Abdulmohsen K. D. Alsukaibi Eida M. Alshammari Salma A. Al-Zahrani Subuhi Sherwani Wahid A. Khan Ritika Saha Smita R. Verma Nessar Ahmed 《Molecules (Basel, Switzerland)》2022,27(6)
Garlic has been reported to inhibit protein glycation, a process that underlies several disease processes, including chronic complications of diabetes mellitus. Biophysical, biochemical, and molecular docking investigations were conducted to assess anti-glycating, antioxidant, and protein structural protection activities of garlic. Results from spectral (UV and fluorescence) and circular dichroism (CD) analysis helped ascertain protein conformation and secondary structure protection against glycation to a significant extent. Further, garlic showed heat-induced protein denaturation inhibition activity (52.17%). It also inhibited glycation, advanced glycation end products (AGEs) formation as well as lent human serum albumin (HSA) protein structural stability, as revealed by reduction in browning intensity (65.23%), decrease in protein aggregation index (67.77%), and overall reduction in cross amyloid structure formation (33.26%) compared with positive controls (100%). The significant antioxidant nature of garlic was revealed by FRAP assay (58.23%) and DPPH assay (66.18%). Using molecular docking analysis, some of the important garlic metabolites were investigated for their interactions with the HSA molecule. Molecular docking analysis showed quercetin, a phenolic compound present in garlic, appears to be the most promising inhibitor of glucose interaction with the HSA molecule. Our findings show that garlic can prevent oxidative stress and glycation-induced biomolecular damage and that it can potentially be used in the treatment of several health conditions, including diabetes and other inflammatory diseases. 相似文献