scholarly journals Effect of steam blanching and high temperature drying on the physicochemical properties, antioxidant activities and consumer acceptability of Hibiscus cannabinus leaves tea

2020 ◽  
Vol 57 (12) ◽  
pp. 4588-4598
Author(s):  
Yen Teng Haw ◽  
Yan Yi Sim ◽  
Kar Lin Nyam
Keyword(s):  
High Temperature ◽  
Physicochemical Properties ◽  
Antioxidant Activities ◽  
Hibiscus Cannabinus ◽  
Consumer Acceptability ◽  
High Temperature Drying

Effects of High-Temperature Drying on Physicochemical Properties of Various Cultivars of Rice

2005 ◽  
Vol 23 (9-11) ◽  
pp. 2227-2237 ◽  
Author(s):  
Lamul Wiset ◽  
George Srzednicki ◽  
Michael Wootton ◽  
Robert H. Driscoll ◽  
Anthony B. Blakeney
Keyword(s):  
High Temperature ◽  
Physicochemical Properties ◽  
High Temperature Drying

Structural/Texture Evolution During Facile Substitution of Ni into ZSM-5 Nanostructure vs. its Impregnation Dispersion Used in Selective Transformation of Methanol to Ethylene and Propylene

2020 ◽  
Vol 23 ◽  
Author(s):  
Parisa Sadeghpour ◽  
Mohammad Haghighi ◽  
Mehrdad Esmaeili
Keyword(s):  
High Temperature ◽  
Physicochemical Properties ◽  
Active Sites ◽  
Catalytic Performance ◽  
Fixed Bed Reactor ◽  
Light Olefins ◽  
Isomorphous Substitution ◽  
Impregnation Method ◽  
Hydrothermal Temperature ◽  
X Ray

Aim and Objective: Effect of two different modification methods for introducing Ni into ZSM-5 framework was investigated under high temperature synthesis conditions. The nickel successfully introduced into the MFI structures at different crystallization conditions to enhance the physicochemical properties and catalytic performance. Materials and Methods: A series of impregnated Ni/ZSM-5 and isomorphous substituted NiZSM-5 nanostructure catalysts were prepared hydrothermally at different high temperatures and within short times. X-ray diffraction (XRD), Field emission scanning electron microscopy (FESEM), Energy dispersive X-ray (EDX), Brunner, Emmett and Teller-Barrett, Joyner and Halenda (BET-BJH), Fourier transform infrared (FTIR) and Temperature-programmed desorption of ammonia (TPDNH3) were applied to investigate the physicochemical properties. Results: Although all the catalysts showed pure silica MFI–type nanosheets and coffin-like morphology, using the isomorphous substitution for Ni incorporation into the ZSM-5 framework led to the formation of materials with lower crystallinity, higher pore volume and stronger acidity compared to using impregnation method. Moreover, it was found that raising the hydrothermal temperature increased the crystallinity and enhanced more uniform incorporation of Ni atoms in the crystalline structure of catalysts. TPD-NH3 analysis demonstrated that high crystallization temperature and short crystallization time of NiZSM-5(350-0.5) resulted in fewer weak acid sites and medium acid strength. The MTO catalytic performance was tested in a fixed bed reactor at 460ºC and GHSV=10500 cm3 /gcat.h. A slightly different reaction pathway was proposed for the production of light olefins over impregnated Ni/ZSM-5 catalysts based on the role of NiO species. The enhanced methanol conversion for isomorphous substituted NiZSM-5 catalysts could be related to the most accessible active sites located inside the pores. Conclusion: The impregnated Ni/ZSM-5 catalyst prepared at low hydrothermal temperature showed the best catalytic performance, while the isomorphous substituted NiZSM-5 prepared at high temperature was found to be the active molecular sieve regarding the stability performance.

High temperature drying characteristics of crushed rice for animal feed

2014 ◽  
Vol 7 (3) ◽  
pp. 133-138 ◽  
Author(s):  
Fumina Tanaka ◽  
Kotaro Yamashita ◽  
Ai Tanaka ◽  
Fumihiko Tanaka ◽  
Daisuke Hamanaka ◽  
...  
Keyword(s):  
High Temperature ◽  
Animal Feed ◽  
Drying Characteristics ◽  
High Temperature Drying

Physicochemical properties and antioxidant activities of polysaccharides sequentially extracted from peony seed dreg

2016 ◽  
Vol 91 ◽  
pp. 23-30 ◽  
Author(s):  
Jun-Jun Shi ◽  
Jian-Guo Zhang ◽  
Yu-Han Sun ◽  
Jie Qu ◽  
Ling Li ◽  
...  
Keyword(s):  
Physicochemical Properties ◽  
Antioxidant Activities
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