The Experts below are selected from a list of 15 Experts worldwide ranked by ideXlab platform
Suning Wang - One of the best experts on this subject based on the ideXlab platform.
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D-π-A Triarylboranes as Reversible Fluorescent Probes for CO2 and Temperature.
Organic letters, 2019Co-Authors: Soren K. Mellerup, Xiang Wang, Suning WangAbstract:Alkylamino-functionalized donor−π–acceptor (D−π–A) triarylboranes have been found to be able to capture CO2, forming the Carbamic Acid Derivative. Due to the close proximity of the amine substituen...
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D−π–A Triarylboranes as Reversible Fluorescent Probes for CO2 and Temperature
2019Co-Authors: Soren K. Mellerup, Xiang Wang, Suning WangAbstract:Alkylamino-functionalized donor−π–acceptor (D−π–A) triarylboranes have been found to be able to capture CO2, forming the Carbamic Acid Derivative. Due to the close proximity of the amine substituent to the boron center, CO2 binding greatly influences the intramolecular charge transfer fluorescence, causing distinct and reversible emission spectral/color change, with a rapid response time, and a detection limit as low as 100 ppm in methanol. In addition, this system is also effective as fluorescence “turn-on” temperature probes due to the dynamic B ← N bond dissociation/association
Soren K. Mellerup - One of the best experts on this subject based on the ideXlab platform.
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D-π-A Triarylboranes as Reversible Fluorescent Probes for CO2 and Temperature.
Organic letters, 2019Co-Authors: Soren K. Mellerup, Xiang Wang, Suning WangAbstract:Alkylamino-functionalized donor−π–acceptor (D−π–A) triarylboranes have been found to be able to capture CO2, forming the Carbamic Acid Derivative. Due to the close proximity of the amine substituen...
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D−π–A Triarylboranes as Reversible Fluorescent Probes for CO2 and Temperature
2019Co-Authors: Soren K. Mellerup, Xiang Wang, Suning WangAbstract:Alkylamino-functionalized donor−π–acceptor (D−π–A) triarylboranes have been found to be able to capture CO2, forming the Carbamic Acid Derivative. Due to the close proximity of the amine substituent to the boron center, CO2 binding greatly influences the intramolecular charge transfer fluorescence, causing distinct and reversible emission spectral/color change, with a rapid response time, and a detection limit as low as 100 ppm in methanol. In addition, this system is also effective as fluorescence “turn-on” temperature probes due to the dynamic B ← N bond dissociation/association
Mireya De La Garza - One of the best experts on this subject based on the ideXlab platform.
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Antiamoebic and Toxicity Studies of a Carbamic Acid Derivative and Its Therapeutic Effect in a Hamster Model of Hepatic Amoebiasis
Antimicrobial agents and chemotherapy, 2005Co-Authors: Cynthia Ordaz-pichardo, Mineko Shibayama, Saúl Villa-treviño, Myriam Arriaga-alba, Enrique Angeles, Mireya De La GarzaAbstract:Amoebiasis is an important public health problem in developing countries. Entamoeba histolytica, the causative agent of amoebiasis, may develop resistance to nitroimidazoles, a group of drugs considered to be the most effective against this parasitic disease. Therefore, research on new drugs for the treatment of this common infection still constitutes an important therapeutic demand. In the present study we determined the effects of a carbamate Derivative, ethyl 4-chlorophenylcarbamate (C4), on trophozoites of E. histolytica strain HM-1:IMSS. C4 was subject to various toxicity tests, including the determination of mutagenicity for bacterial DNA and changes in the enzymatic activities of eukaryotic cells. Genotoxicity studies were performed by the mutagenicity Ames test (plate incorporation and preincubation methods) with Salmonella enterica serovar Typhimurium, with or without metabolic activation produced by the S9 fraction of rat liver. C4 toxicity studies were performed by measuring enzymatic activity in eukaryotic cells by the 3-(4,5-dimethylthiazol-2-yl)-2,5-diphenyltetrazolium bromide-formazan test with Fischer 344 rat hepatocytes. C4 did not induce either frame-shift mutations in S. enterica serovar Typhimurium TA97 or TA98 or base pair substitutions in strains TA100 and TA102. The compound was not toxic for cultured rat hepatic cells. Trophozoites treated with 100 μg of C4 per ml were inhibited 97.88% at 48 h of culture; moreover, damage to the amoebae was also confirmed by electron microscopy. The antiamoebic activity of C4 was evaluated by using an in vivo model of amoebic liver abscess in hamsters. Doses of 75 and 100 mg/100 g of body weight reduced the extent of the amoebic liver abscess by 84 and 94%, respectively. These results justify further studies to clearly validate whether C4 is a new suitable antiamoebic drug.
Xiang Wang - One of the best experts on this subject based on the ideXlab platform.
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D-π-A Triarylboranes as Reversible Fluorescent Probes for CO2 and Temperature.
Organic letters, 2019Co-Authors: Soren K. Mellerup, Xiang Wang, Suning WangAbstract:Alkylamino-functionalized donor−π–acceptor (D−π–A) triarylboranes have been found to be able to capture CO2, forming the Carbamic Acid Derivative. Due to the close proximity of the amine substituen...
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D−π–A Triarylboranes as Reversible Fluorescent Probes for CO2 and Temperature
2019Co-Authors: Soren K. Mellerup, Xiang Wang, Suning WangAbstract:Alkylamino-functionalized donor−π–acceptor (D−π–A) triarylboranes have been found to be able to capture CO2, forming the Carbamic Acid Derivative. Due to the close proximity of the amine substituent to the boron center, CO2 binding greatly influences the intramolecular charge transfer fluorescence, causing distinct and reversible emission spectral/color change, with a rapid response time, and a detection limit as low as 100 ppm in methanol. In addition, this system is also effective as fluorescence “turn-on” temperature probes due to the dynamic B ← N bond dissociation/association
Cynthia Ordaz-pichardo - One of the best experts on this subject based on the ideXlab platform.
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Antiamoebic and Toxicity Studies of a Carbamic Acid Derivative and Its Therapeutic Effect in a Hamster Model of Hepatic Amoebiasis
Antimicrobial agents and chemotherapy, 2005Co-Authors: Cynthia Ordaz-pichardo, Mineko Shibayama, Saúl Villa-treviño, Myriam Arriaga-alba, Enrique Angeles, Mireya De La GarzaAbstract:Amoebiasis is an important public health problem in developing countries. Entamoeba histolytica, the causative agent of amoebiasis, may develop resistance to nitroimidazoles, a group of drugs considered to be the most effective against this parasitic disease. Therefore, research on new drugs for the treatment of this common infection still constitutes an important therapeutic demand. In the present study we determined the effects of a carbamate Derivative, ethyl 4-chlorophenylcarbamate (C4), on trophozoites of E. histolytica strain HM-1:IMSS. C4 was subject to various toxicity tests, including the determination of mutagenicity for bacterial DNA and changes in the enzymatic activities of eukaryotic cells. Genotoxicity studies were performed by the mutagenicity Ames test (plate incorporation and preincubation methods) with Salmonella enterica serovar Typhimurium, with or without metabolic activation produced by the S9 fraction of rat liver. C4 toxicity studies were performed by measuring enzymatic activity in eukaryotic cells by the 3-(4,5-dimethylthiazol-2-yl)-2,5-diphenyltetrazolium bromide-formazan test with Fischer 344 rat hepatocytes. C4 did not induce either frame-shift mutations in S. enterica serovar Typhimurium TA97 or TA98 or base pair substitutions in strains TA100 and TA102. The compound was not toxic for cultured rat hepatic cells. Trophozoites treated with 100 μg of C4 per ml were inhibited 97.88% at 48 h of culture; moreover, damage to the amoebae was also confirmed by electron microscopy. The antiamoebic activity of C4 was evaluated by using an in vivo model of amoebic liver abscess in hamsters. Doses of 75 and 100 mg/100 g of body weight reduced the extent of the amoebic liver abscess by 84 and 94%, respectively. These results justify further studies to clearly validate whether C4 is a new suitable antiamoebic drug.