Antioxidant activity of rosemary essential oil fractions obtained by molecular distillation and their effect on oxidative stability of sunflower oil

2018 ◽  
Vol 242 ◽  
pp. 9-15 ◽  
Author(s):  
Gabriela N. Mezza ◽  
Ana V. Borgarello ◽  
Nelson R. Grosso ◽  
Héctor Fernandez ◽  
María C. Pramparo ◽  
...  
2019 ◽  
Vol 4 (1) ◽  
pp. 112
Author(s):  
Luís Guilherme Escobar De Carvalho ◽  
Ana Carolina Da Silva ◽  
Selma Sanches Dovich

2022 ◽  
Vol 2 (3) ◽  
pp. 238-246
Author(s):  
Letícia Grejo de Oliveira ◽  
Mary Leiva de Faria ◽  
Elaine Soares Amorim

O óleo essencial de alecrim (Rosmarinus offininalis L) pode ser utilizado na prevenção do Alzheimer em decorrência da sua composição química, especialmente compostos terpênicos que atuam pela sua ação antioxidante ou pela inibição da acetilcolinesterase (AChE), que retarda a hidrólise catabólica da acetilcolina com o intuito de compensar a escassez da mesma nos terminas sinápticos. Esse trabalho teve o objetivo de extrair e determinar a atividade antioxidante do óleo essencial de alecrim. Primeiramente extraiu-se o óleo essencial do material botânico de alecrim por hidrodestilação em destilador do tipo Clevenger. A determinação da capacidade antioxidante foi realizada em triplicata pelo método de radical livre utilizando o reagente 2,2-difenil-1-picril hidrazil (DPPH). O rendimento obtido na extração do óleo essencial de alecrim foi de 0,42%. O resultado obtido para a atividade antioxidante do óleo essencial de alecrim foi satisfatório, sendo a capacidade de redução de DPPH em 30 minutos de 87,21%±0,25. Os resultados obtidos indicam que o óleo essencial de alecrim pode ser utilizado no tratamento da doença de Alzheimer, visto que o mesmo pode atuar inibindo o stress oxidativo, a principal causa para o desenvolvimento de doenças neurodegenerativas. Deve-se considerar, entretanto, a composição do óleo essencial visto que os fatores ambientais e de cultivo podem influenciar na capacidade antioxidante do mesmo.   Rosemary essential oil (Rosmarinus offininalis L) can be used in the prevention of Alzheimer's due to its chemical composition, especially terpenic compounds that act by its antioxidant action or by the inhibition of acetylcholinesterase (AChE), which delays the catabolic hydrolysis of acetylcholine in order to compensate the lack of it in the synaptic terminals. This work aimed to extract and determine the antioxidant activity of rosemary essential oil. First, the essential oil was extracted from the rosemary botanical material by hydrodistillation in a Clevenger distiller. The antioxidant capacity was determined in triplicate by the free radical method using the reagent 2,2-diphenyl-1-picryl hydrazyl (DPPH). The yield obtained from the extraction of rosemary essential oil was 0.42%. The result obtained for the antioxidant activity of rosemary essential oil was satisfactory, and the DPPH reduction capacity in 30 minutes was 87.21%±0.25. The results obtained indicate that rosemary essential oil can be used in the treatment of Alzheimer's disease, since it can act by inhibiting oxidative stress, the main cause for the development of neurodegenerative diseases. However, the composition of the essential oil should be considered, since environmental and cultivation factors can influence its antioxidant capacity.  


2020 ◽  
Vol 35 (3) ◽  
pp. 184-192
Author(s):  
Wessal Hassan El-Ageeli ◽  
Bubaker Bubaker M.B Hamed Al-Mansori ◽  
Seham Hamad Mohammed Alsagheer ◽  
Faheem A. F. Ben-Khayal

The aim of this investigation is identification and classification of Rosmarinus Officinalis essential oil components by GC-MS and prediction of their antioxidant activity.     GC-MS analysis of Libyan Rosemary essential oil indicated that in total, 44 compounds were detected comprising 98.3% of compounds in the oil. The results also revealed that the oil contained some constituents with great antioxidant activity such as eugenol, (0.04%), diethylphalate (0.28%), myrtenol (0.46%), γ-Terpinene (2.2%), α – Terpenolene (1.96%), with total percentage of (4.94%) which was considered to be very small. However, about the half of the essential oil contained of constituents with very weak antioxidant activity. These include trans-β-caryophinen (2.2%), α- humulene (0.34%), 1.8- cineol (6.15%), 1.8 – cineol isomer (11.8%), linalool (3.29%), 4-terpinol (5.65%), 1-α – terpine (7.93%), isoborneol (0.29%), perillaldehyde (0.09%), β- citronellal (0.03%), α – pinene (3.4%), comphen (3.04%) and β- pinene(4.21 %), our result shows that the essential oil of Libyan Rosemary might have a weak antioxidant activity.


2017 ◽  
Vol 12 (3) ◽  
pp. 170-177 ◽  
Author(s):  
Ahmed M.S. Hussein ◽  
Mohie M. Kamil ◽  
Shereen N. Lotfy ◽  
Khaled F. Mahmoud ◽  
Fathy M. Mehaya ◽  
...  

2015 ◽  
Vol 18 (5) ◽  
pp. 1083-1092 ◽  
Author(s):  
Seyed Mohammad Bagher Hashemi ◽  
Amin Mousavi Khaneghah ◽  
Yoosef Tavakolpour ◽  
Maryam Asnaashari ◽  
Hamed Mahdavian mehr

2011 ◽  
Vol 26 (15) ◽  
pp. 1458-1463 ◽  
Author(s):  
Mohammad Bagher Hashemi ◽  
Mehrdad Niakousari ◽  
Mohammad Jamal Saharkhiz ◽  
Mohammad Hadi Eskandari

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