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Ross, Matthew,Andersen, Amity,Fox, Zachary W.,Zhang, Yu,Hong, Kiryong,Lee, Jae-Hyuk,Cordones, Amy,March, Anne Marie,Doumy, Gilles,Southworth, Stephen H.,Marcus, Matthew A.,Schoenlein, Robert W.,Mukame American Chemical Society 2018 The journal of physical chemistry. B, Condensed ma Vol.122 No.19
<P>We present a joint experimental and computational study of the hexacyanoferrate aqueous complexes at equilibrium in the 250 meV to 7.15 keV regime. The experiments and the computations include the vibrational spectroscopy of the cyanide ligands, the valence electronic absorption spectra, and Fe 1s core hole spectra using element-specific-resonant X-ray absorption and emission techniques. Density functional theory-based quantum mechanics/molecular mechanics molecular dynamics simulations are performed to generate explicit solute-solvent configurations, which serve as inputs for the spectroscopy calculations of the experiments spanning the IR to X-ray wavelengths. The spectroscopy simulations are performed at the same level of theory across this large energy window, which allows for a systematic comparison of the effects of explicit solute-solvent interactions in the vibrational, valence electronic, and core-level spectra of hexacyanoferrate complexes in water. Although the spectroscopy of hexacyanoferrate complexes in solution has been the subject of several studies, most of the previous works have focused on a narrow energy window and have not accounted for explicit solute-solvent interactions in their spectroscopy simulations. In this work, we focus our analysis on identifying how the local solvation environment around the hexacyanoferrate complexes influences the intensity and line shape of specific spectroscopic features in the UV/vis, X-ray absorption, and valence-to-core X-ray emission spectra. The identification of these features and their relationship to solute-solvent interactions is important because hexacyanoferrate complexes serve as model systems for understanding the photochemistry and photophysics of a large class of Fe(II) and Fe(III) complexes in solution.</P> [FIG OMISSION]</BR>
Tagne Michel Archange Fokam,Paul Aimé Noubissi,Estelle Flora Gaffo,Gaëtan Olivier Fankem,Mukam Joseph Ngakou,René Kamgang,Oyono Jean-Louis Essame 경희대학교 융합한의과학연구소 2022 Oriental Pharmacy and Experimental Medicine Vol.22 No.3
Colitis are one of the worldwide increasing inflammatory bowel diseases. Colitis was induced by intrarectal administration of 1 mL of acetic acid (4%) in rats. The normal and the colitis controls treated with distilled water, the positive control treated with dexamethasone (5 mg/kg), and two test groups treated with extract at 100 and 200 mg/kg bw for seven days. During treatment, the number and quality of stools as well as changes in body weight and body temperature were assessed. At the end, animals were sacrificed; blood and colon were taken for the assay of oxidative stress, hematological and histological parameters. The diarrheal stools and the body temperature significantly (P < 0.01) decreased from the first to the sixth day of treatment compared to colitis control. The extract decreased significantly (P < 0.01) the number of gross colon lesions, malondialdehyde and nitric oxide levels in colon and in blood. The extract increased (P < 0.01) the levels of superoxide dismutase, glutathione, catalase, red blood cells, hemoglobin, hematocrit, total white blood cells as well as platelets. These could justify the use of Anogeissus leiocarpus in the treatment of inflammatory bowel diseases.