The objective of the study is to assess the external and internal exposures to aromatic hydrocarbons in the tar and oil naphthalene distillation processes at a coke plant. 69 workers engaged as operators in tar and oil naphthalene distillation processes and 25 non-exposed subjects were examined. Personal analyses of the benzene, toluene, xylene isomers, ethylbenzene, naphthalene, indan, indene ...

Cenozoic carbon dioxide, weathering, and calcite compensation depth reconciled in a comprehensive cycle model.

Medicinal plante Borazambol with the scientific name of Perovskia abrotanoides Karel. belongs to the family Lamiaceae. It is growing wild in the margin of mountainous roads of arid and cold climate of north Iran. It is for a long time that indigenous people by different methods in traditional medicine use its products in preventing and curing diseases. In this research, essential oils of Perovs...

Distillation (Hinton et al., 2015) and privileged information (Vapnik & Izmailov, 2015) are two techniques that enable machines to learn from other machines. This paper unifies the two into generalized distillation, a framework to learn from multiple machines and data representations. We provide theoretical and causal insight about the inner workings of generalized distillation, extend it to un...

Reactive distillation processes couple chemical reactions and physical separations into a single unit operation. The ethyl acetate production by esterification reaction is equilibrium limited and is suitable to be carried out in a distillation column. In the present work, a reactive distillation column for the production of ethyl acetate is simulated using Aspen Plus. The component compositions...

A desirable process for realizing a low-carbon society is the direct conversion of dilute CO2 from flue gases or air into highly concentrated hydrocarbons without need separate capture an...

Aims. We investigate the impact of updated atmospheric mean opacity input values on modelled transit radius and distribution interior layer mass fractions. Methods. developed applied a coupled interior-atmosphere model. Our straightforward semi-grey calculation temperature enables us to perform thousands model realisations in Monte Carlo approach address potential degeneracies fraction. main co...

A recent article in the Journal of Experimental Biology revisits the siphon principle to explain how sauropods might have browsed with the head held high in trees (Hughes et al., 2016). Hughes et al. state that the principal objection to a vascular siphon is the creation of sub-atmospheric pressures that would collapse cranial veins and thus prevent flow of blood. Their physical models involve ...

It is widely accepted that an efficient oxygen supply and removal of CO2 in small flying insects are sufficiently performed by diffusion with open spiracles. This paper shows that in the tethered flying blowfly, gas exchange occurs by autoventilation and unidirectional airflow. The air is inspired through the mesothoracic spiracles (Sp1) during the downstroke of the wings and is expired through...