Maryam Tajik - Profile on Academia.edu (original) (raw)
Related Authors
Uploads
Papers by Maryam Tajik
Annals of Nuclear Energy, 2011
The exposure buildup factors for gamma and X-ray photons in water are computed using the MCNP4C c... more The exposure buildup factors for gamma and X-ray photons in water are computed using the MCNP4C code. The results are obtained for the energy range 0.04-6 MeV and penetration depths up to 10 mfp. The results are compared with the published buildup factor data during 1960-2010. Both agreements and discrepancies are observed between our results and the data appearing in the literature. It is concluded that at higher energies and deep penetration the existing data for photon buildup factor in water are still inadequate.
Thioacetalization of aldehydes and ketones in SDS micelles
Journal of Sulfur Chemistry, 2011
Aromatic aldehydes have been successfully converted into their corresponding dithioacetal, dithio... more Aromatic aldehydes have been successfully converted into their corresponding dithioacetal, dithiolane and dithiane derivatives in excellent yields with thiol (benzyl thiol and thiophenol), 1,2-ethanedithiol and 1,3-propanedithiol using trichloroacetic acid in sodium dodecyl sulfate micelles. The same procedure is applicable to ketones, but they need more time to be converted into their thioacetals.
Chinese Chemical Letters
A simple and efficient protocol for the deprotection of dithioacetal, 1,3-dithianes and 1,3-dithi... more A simple and efficient protocol for the deprotection of dithioacetal, 1,3-dithianes and 1,3-dithiolanes has been developed using H 2 O 2 -SOCl 2 reagent system. In addition to the absence of overoxidation products for oxidation-prone substrates, high chemoselectivity, the low cost and availability of the reagents, simplicity of the method, short reaction times, and excellent yields can also be considered as strong points for this method.
Annals of Nuclear Energy, 2011
The exposure buildup factors for gamma and X-ray photons in water are computed using the MCNP4C c... more The exposure buildup factors for gamma and X-ray photons in water are computed using the MCNP4C code. The results are obtained for the energy range 0.04-6 MeV and penetration depths up to 10 mfp. The results are compared with the published buildup factor data during 1960-2010. Both agreements and discrepancies are observed between our results and the data appearing in the literature. It is concluded that at higher energies and deep penetration the existing data for photon buildup factor in water are still inadequate.
Thioacetalization of aldehydes and ketones in SDS micelles
Journal of Sulfur Chemistry, 2011
Aromatic aldehydes have been successfully converted into their corresponding dithioacetal, dithio... more Aromatic aldehydes have been successfully converted into their corresponding dithioacetal, dithiolane and dithiane derivatives in excellent yields with thiol (benzyl thiol and thiophenol), 1,2-ethanedithiol and 1,3-propanedithiol using trichloroacetic acid in sodium dodecyl sulfate micelles. The same procedure is applicable to ketones, but they need more time to be converted into their thioacetals.
Chinese Chemical Letters
A simple and efficient protocol for the deprotection of dithioacetal, 1,3-dithianes and 1,3-dithi... more A simple and efficient protocol for the deprotection of dithioacetal, 1,3-dithianes and 1,3-dithiolanes has been developed using H 2 O 2 -SOCl 2 reagent system. In addition to the absence of overoxidation products for oxidation-prone substrates, high chemoselectivity, the low cost and availability of the reagents, simplicity of the method, short reaction times, and excellent yields can also be considered as strong points for this method.