1. What are toxins? p3 2. What are the most common sources of toxins? p4 3. Is it true that even food is a common source of dangerous toxins? p5 4. Why are toxins a threat to my health? p5 5. Are children more susceptible to dangerous toxins than adults? p6 6. How do prescription drugs and other medical treatments contribute to toxic overload? p6 7. What is toxic overload and what are its sympt...

The reduction of Cu(II) oxide species in siliceous matrixes of different porosity (MFI, FAU, MCM-48) and in alumosilicate MFI was studied by temperature-programmed reduction in hydrogen (TPR), by X-ray absorption fine structure (after stationary hydrogen treatments), and by transmission electron microscopy. It was found that the reduction may proceed in one or in two reduction steps. The two-st...

Various Fe-Zeolite catalysts N O c o n v e r s i o n / % Initial activiy After HC coking 30 min Junhua Li*, Ralph T. Yang, Yuhe Wang, Yisun Cheng 3 , Christine K. Lambert Department of Chemical Engineering, University of Michigan, Ann Arbor, MI 48109, (USA) Department of Environment Science and Engineering, Tsinghua University, Beijing, (China) Research & Innovation Center, Ford Motor Company ...

We report that the addition of alkali ions (sodium or potassium) to gold on KLTL-zeolite and mesoporous MCM-41 silica stabilizes mononuclear gold in Au-O(OH)x-(Na or K) ensembles. This single-site gold species is active for the low-temperature (<200°C) water-gas shift (WGS) reaction. Unexpectedly, gold is thus similar to platinum in creating -O linkages with more than eight alkali ions and esta...

2,4,6-Triphenylpyrylium (TP(+)), an electron acceptor, has been included inside the channels of two ordered mesoporous titania (mpTiO(2)). MpTiO(2) contain anatase nanoparticles (3-5 nm) templated by cetyltrimethylammonium and differ by the presence or absence of silica domains as binders of the structure. UV irradiation of TP-mpTiO(2) gives rise to a strong EPR signal. This behaviour was not o...

Abstract Heavy metal toxicity is highly demanding and challenging to clean up the pollutants. To recover issues mentioned above, we propose a hydrothermal synthesis of zeolite (NaX-UP). Further surface modification by poly-ethylenimine (PEI) could turn be amine-modified nanosheets (zeolite NSs) possessed plenty hydroxyl amino groups (Al-O, Si-O-Si, Si-OH NH 2 ) on their surface, decorated with ...

The effect of chemical pretreatments using NaOH, H2O2, and Ca(OH)2 on Empty Palm Fruit Bunches (EPFB) to degrade EPFB lignin before pyrolyis was investigated. Spectrophotometer analysis proved consecutive addition of NaOH and H2O2 decomposed almost 100% of EPFB lignin compared to 44% for the Ca(OH)2, H2O2 system while NaOH and Ca(OH)2 used exclusively could not alter lignin much. Next, the pret...