Scavenging effect of pasipay (passiflora incarnate L.) on singlet oxygen generation and fatty acid photooxygenation

Abstract

Anthracene as a chemical probe is usually used to trap the singlet oxygen and then detection and quantification can be based on absorbance. In this study, oxidation of anthracene declared that rate of singlet oxygen quenching in the presence of pasipay (passiflora incarnate L.) as a natural antioxidant, 1,4 Diazabicyclo [2.2.2] octane (DABCO) as a well‐known singlet oxygen scavenger and highly effective synthetic antioxidants in food industry such as Butylated hydroxytoluene (BHT), Butylated hydroxyanisole (BHA), tert‐Butylhydroquinone (TBHQ) decreased in the order of DABCO >pasipay > TBHQ > BHT > BHA. On the other hand, lipid photooxidation is the undesirable chemical process in which singlet oxygen result in the peroxidation of fatty acids. The results of this study also showed that oleic acid oxidation with singlet oxygen in the presence of pasipay (contains 0.4576 mg flavonoid compounds) diminished about 11% which shows pasipay has an effective role to inhibit lipid peroxidation.

Investigation of Antioxidant Activity of Cumin (Cuminum Cyminum L.) by Means of UV-Vis Spectroscopy, Proton Nuclear Magnetic Resonance and Iodometric Method

“…In our previous studies, an efficient system for the porphyrinssensitized aerobic oxidation of fatty acids has been developed in the presence of visible light [21][22][23][24]. Herein, in continuation of our studies we report oxidative alterations of oleic acid as a result of oxidation with singlet oxygen, superoxide radical, hydrogen peroxide and radical hydroxyl in the presence and absence of cumin as a natural antioxidant.…”

“…PV (peroxide value, meq O 2 /kg) of the samples was determined according to the literature [21][22][23][24][25][26][27]. Oleic acid oxidation process was monitored by UV-Vis (Shimadzu 2100 spectrophotometer) during the reaction at =200-380 nm.…”

Reversible [4 + 2] Photooxygenation in Anion-Coordination-Driven-Assembled A2L2-Type Complexes

“…In the literature, the metallaassembly, which was constructed from 9,10-bis­(3,3′-ethynylpyridyl)­anthracene, also exhibited an unsatisfactory photooxidation even after irradiation for 210 h in DMSO . The reason could be that the lifetime of 1 O 2 in DMSO is very short (19 μs) in the presence of O 2 under irradiation . Furthermore, an investigation of the kinetics of photooxygenation in DMSO was carried out by UV–vis measurements, and the first-order kinetic constants of photooxygenation for L 1 , L 2 , 1 , and 2 in DMSO are 0.0290, 0.0162, 0.0310, and 0.02265 h –1 (Figures S44–S49), respectively.…”

Evaluation of Singlet Oxygen Scavenging Capacity of Peppermint (Mentha Piperita L.), Marjoram (Origanum Majorana L.), Rosemary (Rosmarinus Officinalis L.) And Sage (Salvia Officinalis L.) on Fatty Acid Photooxidation

“…The photosensitized production of singlet oxygen has significance in the areas of the photooxidation of organic compounds and food chemistry [27][28][29][30]. Photooxygenation of oleic acid as one of the targets of singlet oxygen was investigated as a typical standard sample to evaluate the antioxidant effect of peppermint.…”