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141.
Eshtiagh-Hosseini H Housaindokht MR Beyramabadi SA Beheshti S Esmaeili AA Khoshkholgh MJ Morsali A 《Spectrochimica acta. Part A, Molecular and biomolecular spectroscopy》2008,71(4):1341-1347
The new tetra dentate dianionic H2PS (N,N'-dipyridoxyl (1,3-propylenediamine)) Schiff-base ligand and its octahedral Co(III) salen complex [Co(PS)(H2O)(CH3OH)]+CH3COO(-) were synthesized, where coordinating atoms of H2PS (N,N,O(-),O(-)) occupied equatorial positions with H2O and CH3OH as axial ligands. The nature of the H2PS and its complex were determined by elemental and spectrochemical (IR, UV-vis, 1H NMR and Mass) analysis. Also, the fully optimized geometries and vibrational frequencies of them together with the 1H NMR chemical shifts of H2PS have been calculated using density functional theory (B3LYP) method. Obtained structural parameters are in good agreement with the experimental data reported for similar compounds. The calculated and experimental results confirmed the suggested structures for the ligand and complex. 相似文献
142.
2-Acetylcyclopentanone undergoes a smooth reaction with triphenylphosphine and dialkyl acetylenedicarboxylates to produce dialkyl 2-(1-acetyl-2-oxocyclopentyl)-3-(1,1,1-triphenyl-lambda(5)-phosphanylidene)succinates. These compounds undergo intramolecular Wittig reactions in boiling benzene to produce highly strained spirocyclobutene derivatives, which spontaneously undergo ring-opening reactions to produce dialkyl (E)-2-[1-(2-oxocyclopentyliden)ethyl]-2-butenedioates. 相似文献
143.
Hyperphosphorylation of Tau, a protein that stabilizes microtubules, leads to the breakdown of the microtubular structure and ultimately to the formation of neurofibrillar tangles within neurons. Here, we report monitoring of Tau phosphorylations electrochemically, using Tau protein films chemically linked to gold surfaces and 5'-γ-ferrocenyl (Fc) adenosine triphosphate (Fc-ATP) as a co-substrate. Fc-phosphorylation reactions of Tau are explored using the three protein kinases, glycogen synthase kinase (GSK-3β), sarcoma (Src)-related kinase, and protein kinase A (PKA), which catalyze Fc-phosphorylation of different residues and regions within Tau. The kinetic parameters of the biochemical process (K(M) and V(max)) were determined. 相似文献
144.
Amir Reza Jalilian Hassan Yousefnia Samaneh Zolghadri Mohammad Reza Khoshdel Fatemeh Bolourinovin Ali Rahiminejad 《Journal of Radioanalytical and Nuclear Chemistry》2010,284(1):49-54
[67Ga]-ethylenecysteamine cysteine ([67Ga]ECC) was prepared using freshly prepared [67Ga]GaCl3 and ethylenecysteamine cysteine (ECC) for 30 min at 90 °C (radiochemical purity ≈97 ± 0.88% ITLC, specific activity: 210 ± 5 GBq/mM).
Stability of the complex was checked in human serum for 24 h at 37 °C. Partition co-efficient of the tracer in octanol:saline
mixture was determined (log P; 0.8). The biodistribution of the radiolabeled compound in vital organs of wild-type rats were compared with that of free
Ga3+ cation up to 48 h. Initial biodistribution results showed significant kidney excretion of the tracer comparable to that of
homologous 99mTc compound. 相似文献
145.
Samaneh Zolghadri Amir R. Jalilian Hassan Yousefnia Ali Bahrami-Samani Simindokht Shirvani-Arani Mohammad Ghannadi-Maragheh 《Journal of Radioanalytical and Nuclear Chemistry》2010,285(3):461-467
Due to interesting therapeutic properties of 166Ho and the antineoblastic antibiotic, bleomycin (BLM), 166Ho-bleomycin (166Ho-BLM) was developed as a possible therapeutic compound. 166Ho chloride was obtained by thermal neutron irradiation (1 × 1013 n cm?2 s?1) of natural Ho(NO3)3 samples (specific activity = 3–5 GBq mg?1), dissolved in acidic media. At optimized conditions (room temperature, 12 h, 0.15–0.3 mg bleomycin for 74 MBq 166HoCl3) a radiochemical purity of 94–97% was obtained as shown by ITLC and HPLC (specific activity, 700–740 GBq mmol?1). Biodistribution studies of 166Ho chloride and 166Ho-BLM were performed in wild-type rats. The accumulation of the radiolabeled compound in lungs, liver and spleen demonstrates a similar pattern to the other radiolabeled bleomycins. 相似文献
146.
Jahantigh Farhad Ghorashi Seyed Mohammad Bagher Mozaffari Samaneh 《Journal of Solid State Electrochemistry》2020,24(4):883-889
Journal of Solid State Electrochemistry - In this research, nanocoral (NC) film of TiO2 was decorated with nitrogen-doped graphene quantum dots (NGQDs, average size of ∼ 9 nm)... 相似文献
147.
Ahmad Ahmeda Akram Zangeneh Roozbeh Javad Kalbasi Niloofar Seydi Mohammad Mahdi Zangeneh Sanaz Mansouri Samaneh Goorani Rohallah Moradi 《应用有机金属化学》2020,34(4):e5358
The purpose of this experiment was the green synthesis of silver nanoparticles from aqueous extracts of Ziziphora clinopodioides Lam (AgNPs@Ziziphora) and assessment of their cytotoxicity, antioxidant, antibacterial, antifungal, and cutaneous wound-healing effects. These nanoparticles were characterized using ultraviolet–visible spectroscopy (UV–Vis), X-ray diffraction (XRD), field emission scanning electron microscopy with energy-dispersive X-ray spectroscopy (FESEM-EDX), atomic force microscopy (AFM), and transmission electron microscopy (TEM). UV–Vis, TEM, and FESEM analyses indicated that the size of Ag nanoparticles (AgNPs) depended on Z. clinopodioides and AgNO3 concentrations. In vitro biological experiments indicated that AgNPs@Ziziphora has excellent antioxidant potential against DPPH, antifungal effects against Candida guilliermondii, Candida krusei, Candida glabrata, and Candida albicans, and antibacterial activities against Staphylococcus aureus, Bacillus subtilis, Streptococcus pneumonia, Salmonella typhimurium, Pseudomonas aeruginosa, and Escherichia coli O157:H7. Also, these nanoparticles did not exhibit cytotoxicity property against human umbilical vein endothelial cells (HUVECs). An in vivo biological test revealed that AgNPs@Ziziphora ointment significantly (p ≤ 0.01) increased the levels of wound contracture, blood vessels, hydroxyl proline, hexuronic acid, hexosamine, fibrocytes, fibroblasts, and fibrocyte/fibroblast ratio and significantly (p ≤ 0.01) decreased the wound area, and levels of total cells, neutrophils, and lymphocytes than other groups in rats. The results of UV–Vis, XRD, FESEM-EDX, AFM, and TEM confirmed that the aqueous extract of Z. clinopodioides can be used to produce silver nanoparticles with significant antioxidant, antimicrobial, and cutaneous wound-healing properties without any cytotoxicity. 相似文献
148.
Mohammad M. Mojtahedi Samaneh Hosseinkhany M. Saeed Abaee A. Wahid Mesbah 《应用有机金属化学》2020,34(8):e5675
A divergent procedure was developed for multicomponent reaction of ferrocenecarboxaldehyde with malononitrile and various cyclic ketones. Ultrasonic irradiation of 1.0:1.0:2.0 ethanolic mixtures of the reactants produced dicyanoanilines 4 chemoselectively in high yields, while equimolar mixtures of the same reactants in refluxing EtOH solely resulted in four-component formation of cyanopyridines 5 . Both series of products are obtained directly by spontaneous precipitation in the reaction mixtures avoiding cumbersome and expensive chromatographic separations. 相似文献
149.
150.
Mahdi Mirzaee Bahram Bahramian Parichehr Gholampour Samaneh Teymouri Toktam Khorsand 《应用有机金属化学》2019,33(4)
Fe3O4 core nanoparticles were prepared via a solvothermal process, and then they were covered with a surface hydroxyl‐rich boehmite shell via the hydrothermal‐assisted sol–gel processing of aluminum 2‐propoxide. The outer surface of the boehmite shell was subsequently covalently functionalized with 3‐(tri‐methoxysilyl)‐propylamine or 3‐(tri‐methoxysilyl)‐propyl chloride, and the terminal chlorine groups were treated with imidazole. These compounds were used to support the hexa‐carbonyl molybdenum and oxo‐sulfato vanadium (IV) complexes. The supported catalysts were characterized by the FT‐IR, CHN, ICP, and TEM analysis techniques. They were then used in the epoxidation of cis‐cyclooctene. The catalytic procedures were optimized for different parameters such as the solvent, oxidant, and temperature. The reaction progress was investigated by the gas–liquid chromatography analysis. The catalysts used were simply recovered from the solution by applying a magnet, and recycling the experiments revealed that the heterogeneous nanocatalysts could be repeatedly used for the epoxidation of cis‐cyclooctene. The optimized conditions were also successfully used for the epoxidation of some other alkenes. 相似文献