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Ismihan Goze,Ahmet Alim,Senay Akkus Cetinus,Ali Cetin,Nedim Durmus,Ahmet Turan Atas,Nilufer Vural 한국식품영양과학회 2010 Journal of medicinal food Vol.13 No.3
The radical scavenging, antimicrobial, and antispasmodic activities and the composition of Origanum acutidens (Hand.-Mazz.) Ietswaart (Order Labiatte) essential oil were evaluated in vitro. Gas chromatography/mass spectrometry analysis of the oil resulted in the identification of 20 compounds, representing 93.61% of the oil; carvacrol (65%) was the main component. The sample was also subjected to a screening for antioxidant activity by using the 1,1-diphenyl-2-picrylhydrazyl and β-carotene/linoleic acid assays. The essential oil exhibited strong antioxidant activity. Using the agar disk diffusion method, antimicrobial activities of the essential oils were determined for nine microorganisms; antimicrobial activity was shown against eight of them. O. acutidens oil exhibited spontaneous contractions in rat ileum at the 100% level at 0.1mg/mL level.
Ehilé Ehilé Hervé,Goze Nomane Bernard,Kouakou Kouakou Léandre,Yapo Angoué Paul,Ehilé Ehouan Etienne 한국독성학회 2021 Toxicological Research Vol.37 No.1
Macaranga barteri is a plant used in traditional medicine to treat many illnesses. Previous studies showed the efficacy of the aqueous extract of leaf of this plant (AEMb) in the treatment of gastric ulcer within the dose range of 125–500 mg/kg body weight (b.w.). This study aims at evaluating the safety of AEMb on anthropometric and haematological parameters in wistar rats. Seventy rats were divided into seven groups of ten rats each, including five males and five females. The control group was repeatedly administered by gavage with distilled water at 1 ml/100 g for 28 days while test groups 2, 3, 4 and 5, were repeatedly gavaged with AEMb at the doses of 125, 250, 500 and 1000 mg/kg b.w. respectively. As for satellites (groups 6 and 7), they received daily and respectively distilled water at 1 ml/100 g b.w. and AEMb at the dose of 1000 mg/ kg b.w. The results showed that AEMb caused no significant changes in the behaviour of rats and the weight of the organs removed (kidneys, liver, spleen, and heart) and their relative weights at the end of the 28 days of treatment. However, the body weight and the amount of food consumed by animals treated with AEMb at the doses of 250, 500 and 1000 mg/kg b.w. increased significantly (p < 0.05) from the third week compared to control group. Haematological analysis revealed a non-significant increase (p > 0.05) in leukocyte lineage and platelet level in female rats at the studied doses. However, a significant (p < 0.05) increase in platelet level was recorded in male rats at 1000 mg/kg b.w. A significant (p < 0.05) increase in erythrocyte and hemoglobin levels at the doses of 250, 500 and 1000 mg/kg b.w. in treated animals was also revealed. In conclusion, repeated administration of AEMb over 28 days to rats was safe on leucocyte lineage and most of erythrocyte indices at doses ranging from 125 to 1000 mg/kg b.w. Nevertheless, the use of this extract caused a transient increase of erythrocyte, hemoglobin and platelet levels 2 weeks after the end of AEMb administration, but these effects disappeared. So, the subacute oral administration of AEMb revealed few potential toxic effects overall.
Johannes Steinmetz,이현정,Soyoung Kwon,이동수,Christophe Goze-Bac,Edy Abou-Hamad,김화용,박영우 한국물리학회 2007 Current Applied Physics Vol.7 No.1
critical carbon dioxide to ll the nanotubes with toluene and then add the ZieglerNatta catalyst. In order to assure controlled polymer-ization inside the nanotube, the catalyst outside is removed before the reaction. The resulting polyacetylene lled nanotubes arecharacterized by1H NMR and scanning electron microscope.
Polymerization of conducting polymers inside carbon nanotubes
Steinmetz, Johannes,Kwon, Soyoung,Lee, Hyun-Jung,Abou-Hamad, Edy,Almairac, Robert,Goze-Bac, Christophe,Kim, Hwayong,Park, Yung-Woo Elsevier 2006 Chemical physics letters Vol.431 No.1
<P><B>Graphical abstract</B></P><P>Supercritical carbon dioxide impregnation is used to prepare carbon nanotubes filled with pyrrole and <I>N</I>-vinyl carbazole. After the impregnation, the monomers were polymerized inside the nanotubes. The samples are characterized by HRTEM and <SUP>1</SUP>H NMR.</P><ce:figure id='figure.0010'></ce:figure> <P><B>Abstract</B></P><P>Supercritical carbon dioxide is an universal tool to impregnate carbon nanotubes with a wide range of organic molecules. In this Letter, we present our results of carbon nanotubes filled with the photo-conducting polymer poly(<I>N</I>-vinyl carbazole) and the conducting polymer polypyrrole which were prepared by polymerizing the monomers inside the nanotubes. The endohedral nanotubes were characterized by HRTEM and <SUP>1</SUP>H NMR which confirmed that the encapsulated material was indeed the conducting polymer.</P>
Steinmetz, J.,Lee, H.J.,Kwon, S.,Lee, D.S.,Goze-Bac, C.,Abou-Hamad, E.,Kim, H.,Park, Y.W. Elsevier 2007 Current Applied Physics Vol.7 No.1
We present a route to synthesize polyacetylene filled multi-walled carbon nanotubes (MCNT) by in situ polymerization. We use supercritical carbon dioxide to fill the nanotubes with toluene and then add the Ziegler-Natta catalyst. In order to assure controlled polymerization inside the nanotube, the catalyst outside is removed before the reaction. The resulting polyacetylene filled nanotubes are characterized by <SUP>1</SUP>H NMR and scanning electron microscope.
Synthesis and Photodynamicsof Fluorescent Blue BODIPY-PorphyrinTweezers Linked by Triazole Rings
Eggenspiller, Antoine,Takai, Atsuro,El-Khouly, Mohamed E.,Ohkubo, Kei,Gros, ClaudeP.,Bernhard, Claire,Goze, Christine,Denat, Franck,Barbe, Jean-Michel,Fukuzumi, Shunichi AmericanChemical Society 2012 The Journal of physical chemistry A Vol.116 No.15
<P>Novel zinc porphyrin tweezers in which two zinc porphyrins were connected with pi-conjugated boron dipyrromethenes (BDP meso-Por(2) and BDP beta-Por(2)) through triazole rings were synthesized to investigate the photoinduced energy transfer and electron transfer. The UV-vis spectrum of BDP beta-Por(2) which has less bulky substituents than BDP meso-Por(2) exhibits splitting of the Soret band as a result of the interaction between porphyrins of BDP beta-Por(2) in the excited state. Such interaction between porphyrins of both BDP beta-Por(2) and BDP meso-Por(2) is dominant at room temperature, while the coordination of the nitrogen atoms of the triazole rings to the zinc ions of the porphyrins occurs at low temperature. The conformational change of the BDP-porphyrin composites was confirmed by the changes in UV-vis and fluorescence spectra depending on temperature. Photodynamics of BDP meso-Por2 and BDP beta-Por(2) has also been investigated by laser flash photolysis. Efficient singlet-singlet energy transfer from the ZnP to the pi-conjugated BDP moiety of both BDP meso-Por2 and BDP beta-Por(2) occurred in opposite direction as compared to energy transfer from conventional BDP to ZnP due to the pi-conjugation in nonpolar toluene. In polar benzonitrile, however, additional electron transfer occurred along with energy transfer.</P>