scholarly journals -SO3H-functionalization of sub-bituminous coal as a highly active acidic catalyst during the transesterification of spent sunflower oil; characterization, application, and mechanism

2021 ◽  
Vol 7 ◽  
pp. 8699-8710
Author(s):  
Sherouk M. Ibrahim ◽  
Ahmed M. El-Sherbeeny ◽  
Jae-Jin Shim ◽  
Ali A. AlHammadi ◽  
Mostafa R. Abukhadra
2021 ◽  
Author(s):  
Gloria Fernandez-Lorente ◽  
Daniela Remonatto ◽  
J. Vladimir Oliveira ◽  
J. Manuel Guisan ◽  
Débora Oliveira ◽  
...  

Abstract Lipases are an important group of biocatalysts for many industrial applications. Two new commercial low-cost lipases Eversa® Transform and Eversa® Transform 2.0 was immobilized on four different hydrophobic supports: Lewatit-DVB, Purolite-DVB, Sepabeads-C18, and Purolite-C18. The performance of immobilized lipases was investigated in the transesterification of sunflower oil solvent-free in an anhydrous medium. Interesting results were obtained for both lipases and the four supports, but with Sepabeads support the lipases Eversa showed high catalytic activity. However, the more stable and efficient derivative was Eversa® Transform immobilized on Sepabeads C-18. A 98 wt% of ethyl ester of fatty acid (FAEE) was obtained, in 3 hours at 40ºC, ethanol/sunflower oil molar ratio of 3:1 and a 10 wt% of the immobilized biocatalyst. After 6 reaction cycles, the immobilized biocatalyst preserved 70 wt% of activity. Both lipases immobilized in Sepabeads C-18 were highly active and stable in the presence of ethanol. The immobilization of Eversa Transform and Eversa Transform 2.0 in hydrophobic supports described in this study appears to be a promising alternative to the immobilization and application of these news lipases still unexplored.


2012 ◽  
Vol 123-124 ◽  
pp. 316-323 ◽  
Author(s):  
I. Jiménez-Morales ◽  
J. Santamaría-González ◽  
P. Maireles-Torres ◽  
A. Jiménez-López

2009 ◽  
Vol 10 (5) ◽  
pp. 451-455 ◽  
Author(s):  
Nikolaos Nikolaou ◽  
Christos E. Papadopoulos ◽  
Anastasia Lazaridou ◽  
Asimina Koutsoumba ◽  
Achilleas Bouriazos ◽  
...  

Author(s):  
Heloísa Righi Pessoa Silva ◽  
Isabela Julio Iwassa ◽  
Janaina Marques ◽  
Najla Postaue ◽  
Natália Stevanato ◽  
...  

Author(s):  
Alicja Urbaniak ◽  
Anna Skarpańska-Stejnborn

Abstract. The aim of the study was to review recent findings on the use of POM supplements in athletes of various disciplines and physically active participants. Eleven articles published between 2010 and 2018 were included, where the total number of investigated subjects was 176. Male participants constituted the majority of the group (n = 155), as compared to females (n = 21). 45% of research described was conducted on athletes, whereas the remaining studies were based on highly active participants. Randomised, crossover, double-blind study designs constituted the majority of the experimental designs used. POM supplementation varied in terms of form (pills/juice), dosage (50 ml–500 ml) and time of intervention (7 days–2 months) between studies. Among the reviewed articles, POM supplementation had an effect on the improvement of the following: whole body strength; feeling of vitality; acute and delayed muscle fatigue and soreness; increase in vessel diameter; blood flow and serum level of TAC; reduction in the rate of increase for HR, SBP, CK and LDH; support in the recovery of post-training CK, LDH, CRP and ASAT to their baseline levels; reduction of MMP2, MMP9, hsCRP and MDA; and increased activity of antioxidant enzymes (glutathione peroxidase and superoxide dismutase). In the majority of reviewed articles POM supplementation had a positive effect on a variety of parameters studied and the authors recommended it as a supplement for athletes and physically active bodies.


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