The Experts below are selected from a list of 219 Experts worldwide ranked by ideXlab platform
Marc A Anderson - One of the best experts on this subject based on the ideXlab platform.
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novel electrode Materials for electrochemical capacitors part Ii Material characterization of sol gel derived and electrodeposited manganese dioxide thin films
Journal of Materials Research, 2000Co-Authors: Suh Cem Pang, Marc A AndersonAbstract:Material characterization of sol-gel-derived and electrodeposited MnO 2 thin films showed that their microstructures are highly porous in nature. While sol-gel-derived films are nanoparticulate, electrodeposited films showed macropores of random and irregular platelike structures, comprising much denser surface layers and highly porous underlying layers. On the basis of calculated and theoretical density values of 1 and 4.99 g/cm 3 , respectively, the porosity of sol-gel-derived MnO 2 films was determined to be as high as 80%, which is substantially higher than electrodeposited films at 67%. Apart from their higher specific capacitance, sol-gel-derived MnO2 films appeared to exhibit higher cycling stability and reversibility than electrodeposited MnO 2 films. In the case of sol-gel films, thinner films appeared to exhibit higher cycling stability than thicker films. There was less alteration in surface morphology and microstructure, and the rate of loss in charge-storage capacity upon voltammetric cycling was not as significant for sol-gel MnO2 thin films.
Suh Cem Pang - One of the best experts on this subject based on the ideXlab platform.
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novel electrode Materials for electrochemical capacitors part Ii Material characterization of sol gel derived and electrodeposited manganese dioxide thin films
Journal of Materials Research, 2000Co-Authors: Suh Cem Pang, Marc A AndersonAbstract:Material characterization of sol-gel-derived and electrodeposited MnO 2 thin films showed that their microstructures are highly porous in nature. While sol-gel-derived films are nanoparticulate, electrodeposited films showed macropores of random and irregular platelike structures, comprising much denser surface layers and highly porous underlying layers. On the basis of calculated and theoretical density values of 1 and 4.99 g/cm 3 , respectively, the porosity of sol-gel-derived MnO 2 films was determined to be as high as 80%, which is substantially higher than electrodeposited films at 67%. Apart from their higher specific capacitance, sol-gel-derived MnO2 films appeared to exhibit higher cycling stability and reversibility than electrodeposited MnO 2 films. In the case of sol-gel films, thinner films appeared to exhibit higher cycling stability than thicker films. There was less alteration in surface morphology and microstructure, and the rate of loss in charge-storage capacity upon voltammetric cycling was not as significant for sol-gel MnO2 thin films.
S. La Cava - One of the best experts on this subject based on the ideXlab platform.
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RIFM fragrance ingredient safety assessment, ethyl anthranilate, CAS registry number 87-25-2
Food and Chemical Toxicology, 2015Co-Authors: A.m. Api, D. Belsito, Magnus Bruze, Maria Lúcia Zaidan Dagli, S.p. Bhatia, Peter Calow, Wolfgang Dekant, Allison Fryer, L Kromidas, S. La CavaAbstract:The use of this Material under current use conditions is supported by the existing information. This Material was evaluated for Genotoxicity, Repeated Dose Toxicity, Developmental Toxicity, Reproductive Toxicity, Local Respiratory Toxicity, Phototoxicity, Skin Sensitization potential as well as Environmental assessment. Reproductive toxicity was based on the Threshold of Toxicological Concern (TTC) of 0.009 mg/kg/day for a Cramer Class Ii Material. The estimated systemic exposure is determined to be below this value assuming 100% absorption from skin contact and inhalation. A systemic exposure below this TTC value is acceptable
M. H. Miguelez - One of the best experts on this subject based on the ideXlab platform.
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Adiabatic shear banding and scaling laws in chip formation with application to cutting of Ti-6Al-4V
Journal of the Mechanics and Physics of Solids, 2013Co-Authors: Alain Molinari, X. Soldani, M. H. MiguelezAbstract:The phenomenon of adiabatic shear banding is analyzed theoretically in the context of metal cutting. The mechanisms of Material weakening that are accounted for are (i) thermal softening and (Ii) Material failure related to a critical value of the accumulated plastic strain. Orthogonal cutting is viewed as a unique configuration where adiabatic shear bands can be experimentally produced under well controlled loading conditions by individually tuning the cutting speed, the feed (uncut chip thickness) and the tool geometry. The role of cutting conditions on adiabatic shear banding and chip serration is investigated by combining finite element calculations and analytical modeling. This leads to the characterization and classification of different regimes of shear banding and the determination of scaling laws which involve dimensionless parameters representative of thermal and inertia effects. The analysis gives new insights into the physical aspects of plastic flow instability in chip formation. The originality with respect to classical works on adiabatic shear banding stems from the various facets of cutting conditions that influence shear banding and from the specific role exercised by convective flow on the evolution of shear bands. Shear bands are generated at the tool tip and propagate towards the chip free surface. They grow within the chip formation region while being convected away by chip flow. It is shown that important changes in the mechanism of shear banding take place when the characteristic time of shear band propagation becomes equal to a characteristic convection time. Application to Ti-6Al-4V titanium are considered and theoretical predictions are compared to available experimental data in a wide range of cutting speeds and feeds. The fundamental knowledge developed in this work is thought to be useful not only for the understanding of metal cutting processes but also, by analogy, to similar problems where convective flow is also interfering with adiabatic shear banding as in impact mechanics and perforation processes. In that perspective, cutting speeds higher than those usually encountered in machining operations have been also explored.
A.m. Api - One of the best experts on this subject based on the ideXlab platform.
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RIFM fragrance ingredient safety assessment, phenylacetaldehyde glyceryl acetal, CAS registry number 29895-73-6.
Food and chemical toxicology : an international journal published for the British Industrial Biological Research Association, 2020Co-Authors: A.m. Api, D. Belsito, S. Biserta, D. Botelho, Magnus Bruze, G. A. Burton, J. Buschmann, M.a. Cancellieri, Maria Lúcia Zaidan Dagli, M. DateAbstract:Summary: The existing information supports the use of this Material as described in this safety assessment. Phenylacetaldehyde glyceryl acetal was evaluated for genotoxicity, repeated dose toxicity, reproductive toxicity, local respiratory toxicity, phototoxicity/photoallergenicity, skin sensitization, and environmental safety. Data show that phenylacetaldehyde glyceryl acetal is not genotoxic. The repeated dose, reproductive, and local respiratory toxicity endpoints were evaluated using the TTC for a Cramer Class Ii Material, and the exposure to phenylacetaldehyde glyceryl acetal is below the TTC (0.009 mg/kg/day, 0.009 mg/kg/day, and 0.47 mg/day, respectively). Data show that there are no safety concerns for phenylacetaldehyde glyceryl acetal for skin sensitization under the current declared levels of use. The phototoxicity/photoallergenicity endpoints were evaluated based on UV spectra; phenylacetaldehyde glyceryl acetal is not expected to be phototoxic/photoallergenic. The local respiratory toxicity endpoint was evaluated using the TTC for a Cramer Class Ii Material, and the exposure to phenylacetaldehyde glyceryl acetal is below the TTC (0.47 mg/day). The environmental endpoints were evaluated; phenylacetaldehyde glyceryl acetal was found not to be PBT as per the IFRA Environmental Standards, and its risk quotients, based on its current volume of use in Europe and North America (i.e., PEC/PNEC), are
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RIFM fragrance ingredient safety assessment, ethyl anthranilate, CAS registry number 87-25-2
Food and Chemical Toxicology, 2015Co-Authors: A.m. Api, D. Belsito, Magnus Bruze, Maria Lúcia Zaidan Dagli, S.p. Bhatia, Peter Calow, Wolfgang Dekant, Allison Fryer, L Kromidas, S. La CavaAbstract:The use of this Material under current use conditions is supported by the existing information. This Material was evaluated for Genotoxicity, Repeated Dose Toxicity, Developmental Toxicity, Reproductive Toxicity, Local Respiratory Toxicity, Phototoxicity, Skin Sensitization potential as well as Environmental assessment. Reproductive toxicity was based on the Threshold of Toxicological Concern (TTC) of 0.009 mg/kg/day for a Cramer Class Ii Material. The estimated systemic exposure is determined to be below this value assuming 100% absorption from skin contact and inhalation. A systemic exposure below this TTC value is acceptable
