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Jussi V. K. Kukkonen - One of the best experts on this subject based on the ideXlab platform.
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toxicity of Fullerene c60 to sediment dwelling invertebrate chironomus riparius larvae
Environmental Toxicology and Chemistry, 2012Co-Authors: Greta C Waissileinonen, Kukka Pakarinen, Matti T. Leppänen, Jussi V. K. Kukkonen, Jarkko Akkanen, Elijah J PetersenAbstract:An environmentally realistic method to test Fullerene (C60) toxicity to the benthic organism Chironomus riparius was created by allowing suspended Fullerenes to settle down, making a layer on top of the sediment. To test the hypothesis that higher food concentrations will reduce toxic responses, two food concentrations were tested (0.5 and 0.8% Urtica sp.) in sediment containing Fullerene masses of 0.36 to 0.55 mg/cm2 using a 10-d chronic test. In the 0.5% food level treatments, there were significant differences in all growth-related endpoints compared with controls. Fewer effects were observed for the higher food treatment. Fullerene agglomerates were observed by electron microscopy in the gut, but no absorption into the gut epithelial cells was detected. In the organisms exposed to Fullerenes, microvilli were damaged and were significantly shorter. The potential toxicity of Fullerene to C. riparius appears to be caused by morphological changes, inhibiting larval growth. Environ. Toxicol. Chem. 2012; 31: 2108–2116. © 2012 SETAC
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Toxicity of Fullerene (C60) to sediment‐dwelling invertebrate Chironomus riparius larvae
Environmental Toxicology and Chemistry, 2012Co-Authors: Greta C. Waissi-leinonen, Kukka Pakarinen, Matti T. Leppänen, Jarkko Akkanen, Elijah J Petersen, Jussi V. K. KukkonenAbstract:An environmentally realistic method to test Fullerene (C60) toxicity to the benthic organism Chironomus riparius was created by allowing suspended Fullerenes to settle down, making a layer on top of the sediment. To test the hypothesis that higher food concentrations will reduce toxic responses, two food concentrations were tested (0.5 and 0.8% Urtica sp.) in sediment containing Fullerene masses of 0.36 to 0.55 mg/cm2 using a 10-d chronic test. In the 0.5% food level treatments, there were significant differences in all growth-related endpoints compared with controls. Fewer effects were observed for the higher food treatment. Fullerene agglomerates were observed by electron microscopy in the gut, but no absorption into the gut epithelial cells was detected. In the organisms exposed to Fullerenes, microvilli were damaged and were significantly shorter. The potential toxicity of Fullerene to C. riparius appears to be caused by morphological changes, inhibiting larval growth. Environ. Toxicol. Chem. 2012; 31: 2108–2116. © 2012 SETAC
Nataliya G. Bichan - One of the best experts on this subject based on the ideXlab platform.
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The first experimental evidence of room-temperature magnetocaloric effect in Fullerenes
Journal of Thermal Analysis and Calorimetry, 2020Co-Authors: Victor V. Korolev, Tatyana N. Lomova, Anna G. Ramazanova, Olga V. Balmasova, Nataliya G. BichanAbstract:The aim of the study was the first characterization of Fullerenes, organic molecular solids without a d or f metal/ion, as paramagnets with the magnetocaloric effect (MCE) displayed at the temperatures close to room. Direct determinations of MCE/magnetization thermodynamic parameters and a heat capacity of [60]Fullerene (C_60) and 1′-N-methyl-2′-(pyridin-4-yl)pyrrolidino[3′,4′:1,2][60]Fullerene (PyC_60) in aqueous suspensions were performed by means of original microcalorimetric method and differential scanning calorimetry, respectively. Both materials display positive MCE that has been determined to be 0.004 and 0.016 K at 278 K in C_60 and PyC_60, respectively, when the magnetic induction changes from zero to 1.0 T. The increase in PyC_60 MCE is observed despite the fact that the molar heat capacities values of substituted Fullerene are two times higher than that of C_60. These results along with calculated full energies, bond lengths and a charge on atoms according to Mulliken in Fullerenes (PM3 and the Hartree–Fock in the basis of 3-21G, using Gaussian03) are interpreted as a reflection of an aromaticity and antiaromaticity areas state in Fullerenes.
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The first experimental evidence of room-temperature magnetocaloric effect in Fullerenes
Journal of Thermal Analysis and Calorimetry, 2020Co-Authors: Victor V. Korolev, Tatyana N. Lomova, Anna G. Ramazanova, Olga V. Balmasova, Nataliya G. BichanAbstract:The aim of the study was the first characterization of Fullerenes, organic molecular solids without a d or f metal/ion, as paramagnets with the magnetocaloric effect (MCE) displayed at the temperatures close to room. Direct determinations of MCE/magnetization thermodynamic parameters and a heat capacity of [60]Fullerene (C_60) and 1′-N-methyl-2′-(pyridin-4-yl)pyrrolidino[3′,4′:1,2][60]Fullerene (PyC_60) in aqueous suspensions were performed by means of original microcalorimetric method and differential scanning calorimetry, respectively. Both materials display positive MCE that has been determined to be 0.004 and 0.016 K at 278 K in C_60 and PyC_60, respectively, when the magnetic induction changes from zero to 1.0 T. The increase in PyC_60 MCE is observed despite the fact that the molar heat capacities values of substituted Fullerene are two times higher than that of C_60. These results along with calculated full energies, bond lengths and a charge on atoms according to Mulliken in Fullerenes (PM3 and the Hartree–Fock in the basis of 3-21G, using Gaussian03) are interpreted as a reflection of an aromaticity and antiaromaticity areas state in Fullerenes.
Matti T. Leppänen - One of the best experts on this subject based on the ideXlab platform.
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toxicity of Fullerene c60 to sediment dwelling invertebrate chironomus riparius larvae
Environmental Toxicology and Chemistry, 2012Co-Authors: Greta C Waissileinonen, Kukka Pakarinen, Matti T. Leppänen, Jussi V. K. Kukkonen, Jarkko Akkanen, Elijah J PetersenAbstract:An environmentally realistic method to test Fullerene (C60) toxicity to the benthic organism Chironomus riparius was created by allowing suspended Fullerenes to settle down, making a layer on top of the sediment. To test the hypothesis that higher food concentrations will reduce toxic responses, two food concentrations were tested (0.5 and 0.8% Urtica sp.) in sediment containing Fullerene masses of 0.36 to 0.55 mg/cm2 using a 10-d chronic test. In the 0.5% food level treatments, there were significant differences in all growth-related endpoints compared with controls. Fewer effects were observed for the higher food treatment. Fullerene agglomerates were observed by electron microscopy in the gut, but no absorption into the gut epithelial cells was detected. In the organisms exposed to Fullerenes, microvilli were damaged and were significantly shorter. The potential toxicity of Fullerene to C. riparius appears to be caused by morphological changes, inhibiting larval growth. Environ. Toxicol. Chem. 2012; 31: 2108–2116. © 2012 SETAC
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Toxicity of Fullerene (C60) to sediment‐dwelling invertebrate Chironomus riparius larvae
Environmental Toxicology and Chemistry, 2012Co-Authors: Greta C. Waissi-leinonen, Kukka Pakarinen, Matti T. Leppänen, Jarkko Akkanen, Elijah J Petersen, Jussi V. K. KukkonenAbstract:An environmentally realistic method to test Fullerene (C60) toxicity to the benthic organism Chironomus riparius was created by allowing suspended Fullerenes to settle down, making a layer on top of the sediment. To test the hypothesis that higher food concentrations will reduce toxic responses, two food concentrations were tested (0.5 and 0.8% Urtica sp.) in sediment containing Fullerene masses of 0.36 to 0.55 mg/cm2 using a 10-d chronic test. In the 0.5% food level treatments, there were significant differences in all growth-related endpoints compared with controls. Fewer effects were observed for the higher food treatment. Fullerene agglomerates were observed by electron microscopy in the gut, but no absorption into the gut epithelial cells was detected. In the organisms exposed to Fullerenes, microvilli were damaged and were significantly shorter. The potential toxicity of Fullerene to C. riparius appears to be caused by morphological changes, inhibiting larval growth. Environ. Toxicol. Chem. 2012; 31: 2108–2116. © 2012 SETAC
Victor V. Korolev - One of the best experts on this subject based on the ideXlab platform.
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The first experimental evidence of room-temperature magnetocaloric effect in Fullerenes
Journal of Thermal Analysis and Calorimetry, 2020Co-Authors: Victor V. Korolev, Tatyana N. Lomova, Anna G. Ramazanova, Olga V. Balmasova, Nataliya G. BichanAbstract:The aim of the study was the first characterization of Fullerenes, organic molecular solids without a d or f metal/ion, as paramagnets with the magnetocaloric effect (MCE) displayed at the temperatures close to room. Direct determinations of MCE/magnetization thermodynamic parameters and a heat capacity of [60]Fullerene (C_60) and 1′-N-methyl-2′-(pyridin-4-yl)pyrrolidino[3′,4′:1,2][60]Fullerene (PyC_60) in aqueous suspensions were performed by means of original microcalorimetric method and differential scanning calorimetry, respectively. Both materials display positive MCE that has been determined to be 0.004 and 0.016 K at 278 K in C_60 and PyC_60, respectively, when the magnetic induction changes from zero to 1.0 T. The increase in PyC_60 MCE is observed despite the fact that the molar heat capacities values of substituted Fullerene are two times higher than that of C_60. These results along with calculated full energies, bond lengths and a charge on atoms according to Mulliken in Fullerenes (PM3 and the Hartree–Fock in the basis of 3-21G, using Gaussian03) are interpreted as a reflection of an aromaticity and antiaromaticity areas state in Fullerenes.
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The first experimental evidence of room-temperature magnetocaloric effect in Fullerenes
Journal of Thermal Analysis and Calorimetry, 2020Co-Authors: Victor V. Korolev, Tatyana N. Lomova, Anna G. Ramazanova, Olga V. Balmasova, Nataliya G. BichanAbstract:The aim of the study was the first characterization of Fullerenes, organic molecular solids without a d or f metal/ion, as paramagnets with the magnetocaloric effect (MCE) displayed at the temperatures close to room. Direct determinations of MCE/magnetization thermodynamic parameters and a heat capacity of [60]Fullerene (C_60) and 1′-N-methyl-2′-(pyridin-4-yl)pyrrolidino[3′,4′:1,2][60]Fullerene (PyC_60) in aqueous suspensions were performed by means of original microcalorimetric method and differential scanning calorimetry, respectively. Both materials display positive MCE that has been determined to be 0.004 and 0.016 K at 278 K in C_60 and PyC_60, respectively, when the magnetic induction changes from zero to 1.0 T. The increase in PyC_60 MCE is observed despite the fact that the molar heat capacities values of substituted Fullerene are two times higher than that of C_60. These results along with calculated full energies, bond lengths and a charge on atoms according to Mulliken in Fullerenes (PM3 and the Hartree–Fock in the basis of 3-21G, using Gaussian03) are interpreted as a reflection of an aromaticity and antiaromaticity areas state in Fullerenes.
Anna G. Ramazanova - One of the best experts on this subject based on the ideXlab platform.
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The first experimental evidence of room-temperature magnetocaloric effect in Fullerenes
Journal of Thermal Analysis and Calorimetry, 2020Co-Authors: Victor V. Korolev, Tatyana N. Lomova, Anna G. Ramazanova, Olga V. Balmasova, Nataliya G. BichanAbstract:The aim of the study was the first characterization of Fullerenes, organic molecular solids without a d or f metal/ion, as paramagnets with the magnetocaloric effect (MCE) displayed at the temperatures close to room. Direct determinations of MCE/magnetization thermodynamic parameters and a heat capacity of [60]Fullerene (C_60) and 1′-N-methyl-2′-(pyridin-4-yl)pyrrolidino[3′,4′:1,2][60]Fullerene (PyC_60) in aqueous suspensions were performed by means of original microcalorimetric method and differential scanning calorimetry, respectively. Both materials display positive MCE that has been determined to be 0.004 and 0.016 K at 278 K in C_60 and PyC_60, respectively, when the magnetic induction changes from zero to 1.0 T. The increase in PyC_60 MCE is observed despite the fact that the molar heat capacities values of substituted Fullerene are two times higher than that of C_60. These results along with calculated full energies, bond lengths and a charge on atoms according to Mulliken in Fullerenes (PM3 and the Hartree–Fock in the basis of 3-21G, using Gaussian03) are interpreted as a reflection of an aromaticity and antiaromaticity areas state in Fullerenes.
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The first experimental evidence of room-temperature magnetocaloric effect in Fullerenes
Journal of Thermal Analysis and Calorimetry, 2020Co-Authors: Victor V. Korolev, Tatyana N. Lomova, Anna G. Ramazanova, Olga V. Balmasova, Nataliya G. BichanAbstract:The aim of the study was the first characterization of Fullerenes, organic molecular solids without a d or f metal/ion, as paramagnets with the magnetocaloric effect (MCE) displayed at the temperatures close to room. Direct determinations of MCE/magnetization thermodynamic parameters and a heat capacity of [60]Fullerene (C_60) and 1′-N-methyl-2′-(pyridin-4-yl)pyrrolidino[3′,4′:1,2][60]Fullerene (PyC_60) in aqueous suspensions were performed by means of original microcalorimetric method and differential scanning calorimetry, respectively. Both materials display positive MCE that has been determined to be 0.004 and 0.016 K at 278 K in C_60 and PyC_60, respectively, when the magnetic induction changes from zero to 1.0 T. The increase in PyC_60 MCE is observed despite the fact that the molar heat capacities values of substituted Fullerene are two times higher than that of C_60. These results along with calculated full energies, bond lengths and a charge on atoms according to Mulliken in Fullerenes (PM3 and the Hartree–Fock in the basis of 3-21G, using Gaussian03) are interpreted as a reflection of an aromaticity and antiaromaticity areas state in Fullerenes.
