Amino Acid Catalysis of 2-Alkylfuran Formation from Lipid Oxidation-Derived α,β-Unsaturated Aldehydes

2011 ◽  
Vol 59 (20) ◽  
pp. 11058-11062 ◽  
Author(s):  
An Adams ◽  
Capucine Bouckaert ◽  
Fien Van Lancker ◽  
Bruno De Meulenaer ◽  
Norbert De Kimpe
Keyword(s):  
Amino Acid ◽  
Lipid Oxidation ◽  
Acid Catalysis ◽  
Unsaturated Aldehydes

Aromatic Constituents from Chinese Traditional Smoke-cured Bacon of Mini-pig

2008 ◽  
Vol 14 (4) ◽  
pp. 329-340 ◽  
Author(s):  
J.-C. Xie ◽  
B.-G. Sun ◽  
S.-B. Wang
Keyword(s):  
Solvent Extraction ◽  
Phenolic Compounds ◽  
Lipid Oxidation ◽  
Solid Phase Microextraction ◽  
Solid Phase ◽  
Active Regions ◽  
Volatile Composition ◽  
Headspace Solid Phase Microextraction ◽  
Unsaturated Aldehydes

Volatile composition of Chinese traditional smoke-cured bacon of Mini-pig breed was first characterized. Both headspace solid phase microextraction (SPME) and simultaneous distillation and solvent extraction (SDE) were performed. SDE exhibited efficiency in the extraction of representative aromatic volatiles especially the phenolic smoky flavors from the bacon sample. In total, 104 different components were found with the major quantity and kinds of aromas being the volatile saturated and unsaturated aldehydes from lipid oxidation and the phenolic compounds from smoke. Olfactory evaluation (GC-O) of the SDE extract revealed five basic odor patterns pertaining to 53 odor active regions and 47 odorants. Some key flavors accounting for the bacon aroma were (E, E)-2, 4-decadienal, 3-(methylthio) propanal, 2-furanmethanol, guaiacol, 3-ethylphenol and 2, 5-dimethylpyrazine.

scholarly journals Quality of Protein Isolates and Hydrolysates from Baltic Herring (Clupea harengus membras) and Roach (Rutilus rutilus) Produced by pH-Shift Processes and Enzymatic Hydrolysis

Foods ◽  
2022 ◽  
Vol 11 (2) ◽  
pp. 230
Author(s):  
Tanja Kakko ◽  
Annelie Damerau ◽  
Anni Nisov ◽  
Anna Puganen ◽  
Saska Tuomasjukka ◽  
...  
Keyword(s):  
Amino Acid ◽  
Enzymatic Hydrolysis ◽  
Lipid Oxidation ◽  
Rutilus Rutilus ◽  
Clupea Harengus ◽  
Roach Rutilus Rutilus ◽  
Protein Isolates ◽  
Ph Shift ◽  
Baltic Herring

Fractionation is a potential way to valorize under-utilized fishes, but the quality of the resulting fractions is crucial in terms of their applicability. The aim of this work was to study the quality of protein isolates and hydrolysates extracted from roach (Rutilus rutilus) and Baltic herring (Clupea harengus membras) using either pH shift or enzymatic hydrolysis. The amino acid composition of protein isolates and hydrolysates mostly complied with the nutritional requirements for adults, but protein isolates produced using pH shift showed higher essential to non-essential amino acid ratios compared with enzymatically produced hydrolysates, 0.84–0.85 vs. 0.65–0.70, respectively. Enzymatically produced protein hydrolysates had a lower total lipid content, lower proportion of phospholipids, and exhibited lower degrees of protein and lipid oxidation compared with pH-shift-produced isolates. These findings suggest enzymatic hydrolysis to be more promising from a lipid oxidation perspective while the pH-shift method ranked higher from a nutrient perspective. However, due to the different applications of protein isolates and hydrolysates produced using pH shift or enzymatic hydrolysis, respectively, the further optimization of both studied methods is recommended.

Asymmetric Amino Acid Catalysis

2008 ◽  
Author(s):  
Armando Córdova ◽  
Enrique Díaz-Herrera ◽  
Eusebio Juaristi
Keyword(s):  
Amino Acid ◽  
Acid Catalysis

Designed Amino Acid Catalysis

2011 ◽  
pp. 1
Author(s):  
N. Z. Burns ◽  
E. N. Jacobsen
Keyword(s):  
Amino Acid ◽  
Acid Catalysis
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