Copolymerization of ethylene with 1-hexene was carried out using two ansa-fluorenyl titanium derivative complexes. The substituent effect on the catalytic activity, monomer reactivity ratio and polymer property was investigated. It was found that the presence of t-Bu groups on fluorenyl ring exhibited remarkable catalytic activity and produced polymer with high molecular weight. However, these ...

Abstract The aim of this study is to investigate the impact global operating parameters, e.g., engine speed, brake mean effective pressure, and air–fuel ratio, a turbocharged 4-cylinder GDI on reactivity soot particles against oxidation. knowledge crucial for optimizing gasoline particulate filter regeneration strategies is, consequently, key parameter reducing fuel consumption CO 2 emissions. ...

Abstract. Despite the significant contribution of biogenic volatile organic compounds (BVOCs) to aerosol formation and ozone production loss, there are few long-term, year-round, ongoing measurements their volume mixing ratios quantification impacts on atmospheric reactivity. To address this gap, we present 1 year hourly chemically resolved BVOCs between 15 September 2019 2020, collected at a r...

Both endothelial and immune dysfunction contribute to the high mortality rate in human sepsis, but the underlying mechanisms are unclear. In response to infection, interferon-γ activates indoleamine 2,3-dioxygenase (IDO) which metabolizes the essential amino acid tryptophan to the toxic metabolite kynurenine. IDO can be expressed in endothelial cells, hepatocytes and mononuclear leukocytes, all...

A H 2 O /MnO molar ratio as low 0.03 can affect the redox activity of MnO particles and their reactivity in natural systems.

a b s t r a c tintroduction: craving to methamphetamine is a significant health concern and exposure to methamphetamine cues in laboratory can induce craving. in this study, a task designing procedure for evaluating methamphetamine cue-induced craving in laboratory conditions is examined. methods: first a series of visual cues which could induce craving was identified by 5 discussion sessions b...

The enantiomeric ratio (e.r.) in the 3,4-dihydroquinolin-2-one photoproduct during 6π-photocyclization of α-substituted axially chiral ortho-tert-butyl-acrylanilides depends on the nature of the reactive spin state (singlet or triplet), where the singlet-spin state reactivity gives a racemic mixture and the triplet reactivity gives an e.r. value >95 : 5.