On the Promotional and Inhibitory Effects of Water on Wacker-Type Ethylene Oxidation Over Pd–Cu/Zeolite Y

ACS Catalysis ◽  
2021 ◽  
pp. 8684-8691
Author(s):  
Jerick Imbao ◽  
Jeroen A. van Bokhoven ◽  
Maarten Nachtegaal
Keyword(s):  
Zeolite Y ◽  
Ethylene Oxidation ◽  
Inhibitory Effects

scholarly journals Optimization of a heterogeneous Pd–Cu/zeolite Y Wacker catalyst for ethylene oxidation

2020 ◽  
Vol 56 (9) ◽  
pp. 1377-1380 ◽  
Author(s):  
Jerick Imbao ◽  
Jeroen A. van Bokhoven ◽  
Maarten Nachtegaal
Keyword(s):  
Heterogeneous Catalyst ◽  
Zeolite Y ◽  
Ethylene Oxidation ◽  
Wacker Oxidation

A heterogeneous catalyst based on palladium- and copper-exchanged zeolite Y is optimized for stable Wacker oxidation.

Surface roughness measurements of vanadium-contaminated fluidized cracking catalysts by atomic force microscopy

1996 ◽  
Vol 54 ◽  
pp. 866-867
Author(s):  
H. Kinney ◽  
M.L. Occelli ◽  
S.A.C. Gould
Keyword(s):  
Surface Roughness ◽  
Zeolite Y ◽  
Atomic Level ◽  
Microporous Structure ◽  
Contact Mode ◽  
Force Microscopy ◽  
Atomic Force ◽  
Before And After ◽  
Roughness Measurements ◽  
Cracking Catalysts

For this study we have used a contact mode atomic force microscope (AFM) to study to topography of fluidized cracking catalysts (FCC), before and after contamination with 5% vanadium. We selected the AFM because of its ability to well characterize the surface roughness of materials down to the atomic level. It is believed that the cracking in the FCCs occurs mainly on the catalysts top 10-15 μm suggesting that the surface corrugation could play a key role in the FCCs microactivity properties. To test this hypothesis, we chose vanadium as a contaminate because this metal is capable of irreversibly destroying the FCC crystallinity as well as it microporous structure. In addition, we wanted to examine the extent to which steaming affects the vanadium contaminated FCC. Using the AFM, we measured the surface roughness of FCCs, before and after contamination and after steaming.We obtained our FCC (GRZ-1) from Davison. The FCC is generated so that it contains and estimated 35% rare earth exchaged zeolite Y, 50% kaolin and 15% binder.

Inhibitory effects of bioaccessible anthocyanins and procyanidins from apple, red grape, cinnamon on α-amylase, α-glucosidase and lipase

2020 ◽  
pp. 1-9
Author(s):  
Pınar Ercan ◽  
Sedef Nehir El
Keyword(s):  
Inhibitory Activity ◽  
Digestive Enzymes ◽  
Positive Control ◽  
Anthocyanin Content ◽  
Inhibitory Effects ◽  
Total Anthocyanin ◽  
Total Anthocyanin Content ◽  
Before And After ◽  
Red Grape

Abstract. The goals of this study were to determine and evaluate the bioaccessibility of total anthocyanin and procyanidin in apple (Amasya, Malus communis), red grape (Papazkarası, Vitis vinifera) and cinnamon (Cassia, Cinnamomum) using an in vitro static digestion system based on human gastrointestinal physiologically relevant conditions. Also, in vitro inhibitory effects of these foods on lipid (lipase) and carbohydrate digestive enzymes (α-amylase and α-glucosidase) were performed with before and after digested samples using acarbose and methylumbelliferyl oleate (4MUO) as the positive control. While the highest total anthocyanin content was found in red grape (164 ± 2.51 mg/100 g), the highest procyanidin content was found in cinnamon (6432 ± 177.31 mg/100 g) (p < 0.05). The anthocyanin bioaccessibilities were found as 10.2 ± 1%, 8.23 ± 0.64%, and 8.73 ± 0.70% in apple, red grape, and cinnamon, respectively. The procyanidin bioaccessibilities of apple, red grape, and cinnamon were found as 17.57 ± 0.71%, 14.08 ± 0.74% and 18.75 ± 1.49%, respectively. The analyzed apple, red grape and cinnamon showed the inhibitory activity against α-glucosidase (IC50 544 ± 21.94, 445 ± 15.67, 1592 ± 17.58 μg/mL, respectively), α-amylase (IC50 38.4 ± 7.26, 56.1 ± 3.60, 3.54 ± 0.86 μg/mL, respectively), and lipase (IC50 52.7 ± 2.05, 581 ± 54.14, 49.6 ± 2.72 μg/mL), respectively. According to our results apple, red grape and cinnamon have potential to inhibit of lipase, α-amylase and α-glucosidase digestive enzymes.

Inhibitory effects of auxins and related substances on the activity of an Arabidopsis glutathione S-transferase isozyme expressed in Escherichia coli

1995 ◽  
Vol 94 (4) ◽  
pp. 566-574 ◽  
Author(s):  
Masaaki K. Watahiki ◽  
Hitoshi Mori ◽  
Kotaro T. Yamamoto
Keyword(s):  
Escherichia Coli ◽  
Inhibitory Effects ◽  
Glutathione S Transferase ◽  
Related Substances

Inhibitory Effects of Transposed Letter Neighbours During Silent Sentence Reading

2014 ◽  
Author(s):  
Ascension Pagan ◽  
Hazel Blythe ◽  
Kevin Paterson ◽  
Simon Liversedge
Keyword(s):  
Inhibitory Effects ◽  
Sentence Reading

When Are Neighbors Hostile? Inhibitory Effects in Visual Word Recognition

2004 ◽  
Author(s):  
Wendy De Moor ◽  
Tom Verguts
Keyword(s):  
Word Recognition ◽  
Visual Word Recognition ◽  
Visual Word ◽  
Inhibitory Effects

Investigations on the solid-state ion exchange of Ni2+, Cu+ and Zn2+ ions into zeolite Y using EXAFS techniques

1997 ◽  
Vol 101-103 (1-2) ◽  
pp. 425-430 ◽  
Author(s):  
H Förster
Keyword(s):  
Solid State ◽  
Ion Exchange ◽  
Zeolite Y
Sign in / Sign up

Export Citation Format

Share Document