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The article describes the use of the rubber compounding agent called fractice in rubber production and manufacturing processes. Information on the definition and material composition of fractice, its classification, and composition of oil absorption of fractices is offered. The history, chemical structure and characteristics as elastic materials of fractices with a three-dimensional network structure are discussed.

Heinz Heinemann contributed significantly to the field of heterogeneous catalysis over his 60 year career. As a scientist and later Catalysis Research Manager at ExxonMobil’s (then Mobil’s) Princeton Laboratory, he oversaw the development of many of the ZSM-5 processes for fuels and chemicals, most notably, a post-reforming process known as M-Forming. The M-Forming process development program justified Mobil’s commercial development of ZSM-5, which in turn led to the rapid development of many other ZSM-5 processes including Methanol-to-Gasoline, Middle Distillate Dewaxing, xylene isomerizaion, and lubes dewaxing. [ABSTRACT FROM AUTHOR]

A correction to the article "Heinz Heinemann's Legacy at ExxonMobil: An Illustrious Career in Industrial Catalysis" that was published in the October 22, 2009 issue is presented.

In this study, the nitrogen removal performance of a municipal wastewater treatment plant that employs cyclic activated sludge technology (CAST) was evaluated. The impact of key operational conditions such as temperature, dissolved oxygen (DO) concentrations and operating modes were examined in parallel. During summer, when the operating temperature ranged from 27-30°C, the NH4+-N and total nitrogen (TN) removal efficiencies were 51 ± 7% and 42 ± 7%, respectively, and simultaneous nitrification and denitrification (SND) was considered to be the major nitrogen removal mechanism. In contrast, at a low operating temperature of 10-15°C, the DO concentration increased from 0.7 to 3.0 mg/L; however, the NH4+-N and TN removals were both inefficient due to poor biomass activities, which was demonstrated by a lower specific oxygen uptake rate (SOUR) of 1.2 mg O2/g SS· h (15°C). Moreover, a 3h-mode for the CAST process was preferable during winter because the effluent wastewater quality was similar to that obtained when the 4h-mode was used. The extremely low organic loading was the primary reason for the poor bioactivity of the sludge in the CAST system, and this eventually led to deterioration of the nitrogen removal efficiencies. [ABSTRACT FROM AUTHOR]