Lipid-Lowering and Antioxidant Effects of Hydroxytyrosol and Its Triacetylated Derivative Recovered from Olive Tree Leaves in Cholesterol-Fed Rats

2008 ◽  
Vol 56 (8) ◽  
pp. 2630-2636 ◽  
Author(s):  
Hedya Jemai ◽  
Ines Fki ◽  
Mohamed Bouaziz ◽  
Zouhaier Bouallagui ◽  
Abdelfattah El Feki ◽  
...  
Keyword(s):  
Olive Tree ◽  
Lipid Lowering ◽  
Tree Leaves ◽  
Olive Tree Leaves ◽  
Antioxidant Effects

scholarly journals Effect of olive tree leaves and twigs on intake, digestibility, growth performance and blood variables of Shami goats

2021 ◽  
Author(s):  
Ashraf Alkhtib ◽  
Muhannad Muna ◽  
Emily Burton ◽  
Jane Wamatu ◽  
Mohammad Darag ◽  
...  
Keyword(s):  
Growth Performance ◽  
Olive Tree ◽  
Tree Leaves ◽  
Olive Tree Leaves ◽  
Blood Variables

scholarly journals Acid Hydrolysis of Olive Tree Leaves: Preliminary Study towards Biochemical Conversion

Processes ◽  
2020 ◽  
Vol 8 (8) ◽  
pp. 886 ◽  
Author(s):  
Soledad Mateo ◽  
Pilar Mateo ◽  
Marco Barbanera ◽  
Cinzia Buratti ◽  
Alberto J. Moya
Keyword(s):  
Acid Hydrolysis ◽  
Sulfuric Acid Concentration ◽  
Specific Effect ◽  
Olive Tree ◽  
Small Scale ◽  
Tree Leaves ◽  
Experimental Conditions ◽  
Inhibitory Compounds ◽  
Starting Point ◽  
Olive Tree Leaves

Olive tree leaves, an abundant agricultural by-product without enough industrial market outlets, are presented in this study as a relevant resource of available carbohydrates to be chemically treated for monomeric sugar production. Characterization of two main granulometric fractions is the starting point for testing the specific effect and the relevance of three main factors (time, temperature, and sulfuric acid concentration) on diluted acid hydrolysis with respect to oligosaccharides, simple sugars, and fermentation inhibitory compounds production. The selected conditions (100 ∘ C, 90 min, and 6% w/w H 2 SO 4 ) to perform the small scale hydrolytic process, considering response surface methodology (2 3 factorial design with center points), implied production of acetic acid and hydroxymethylfurfural in concentrations not exceeding 1.10 kg m − 3 and 0.25 kg m − 3 , respectively. Thus, these experimental conditions were the reference framework to evaluate the effect of a meaningful scaling stage in a hydrolysis reactor, considering kinetic parameters based on hydrolysis rates and d-glucose and d-xylose generation.

The effect of dietary inclusion of olive tree leaves and grape marc on the content of conjugated linoleic acid and vaccenic acid in the milk of dairy sheep and goats

2008 ◽  
Vol 75 (3) ◽  
pp. 270-278 ◽  
Author(s):  
Eleni Tsiplakou ◽  
Georgios Zervas
Keyword(s):  
Milk Fat ◽  
Vaccenic Acid ◽  
Olive Tree ◽  
Milk Fatty Acid ◽  
Tree Leaves ◽  
Sheep And Goats ◽  
Grape Marc ◽  
Sheep Milk ◽  
Ad Libitum ◽  
Olive Tree Leaves

Olive tree leaves (OTL) and grape marc (GM) are by-products with high linolenic (LNA) and linoleic (LA) acid content, respectively, which can be used as dietary ingredients to increase the cis-9 trans-11 conjugated linoleic acid (CLA) content of milk fat in sheep and goats. An experiment was conducted with 16 Friesian ewes and 16 Alpine goats to study the effect of OTL and GM inclusion in sheep and goat diets on their milk fatty acid profile, with emphasis on cis-9, trans-11 CLA and vaccenic acid (VA). Ewes and the goats were fed the control (C) diets from parturition to the 90 days in milk (DIM) and then both groups were divided into two sub-groups (treatments). The control groups of both species continued to be fed the C diets, whereas the treated groups were gradually switched over a 2-week period (DIM=91–105) from the C diets to that of treatment 1, which contained air-dried OTL. These OTL diets were fed ad libitum for 1 month (DIM=106–135). After that period, the same treated groups, after 2 weeks of gradual adaptation (DIM=136–150), were switched to treatment 2, which contained air-dried GM. The GM diets were fed ad libitum for 1 month (151–180 DIM). Concentrations of polyunsaturated fatty acids (PUFA) and mono-unsaturated fatty acids increased significantly in milk fat of sheep fed OTL v. C. For goats, only the PUFA in milk fat was increased by feeding OTL compared with C. Relative to C, GM increased significantly the concentration of PUFA only in milk fat of sheep. OTL and GM diets increased the cis-9, trans-11 CLA and VA content in milk fat, compared with C, only in sheep. GM caused a sharp increase in 18:0 only in sheep milk fat, while the OTL diet increased significantly the 18:0 in milk fat of goats. GM and OTL diets also had opposite effects on the 18:1/18:0 ratio of sheep milk fat. In conclusion, OTL and GM, when included in sheep diets altered the milk fatty acid profile with a pronounced increase in cis-9, trans-11 CLA and VA contents. The results show that the response of sheep and goats to OTL and GM diets was different, suggesting a species difference that needs further investigation.

scholarly journals AMPK modulatory activity of olive–tree leaves phenolic compounds: Bioassay-guided isolation on adipocyte model and in silico approach

PLoS ONE ◽  
2017 ◽  
Vol 12 (3) ◽  
pp. e0173074 ◽  
Author(s):  
Cecilia Jiménez-Sánchez ◽  
Mariló Olivares-Vicente ◽  
Celia Rodríguez-Pérez ◽  
María Herranz-López ◽  
Jesús Lozano-Sánchez ◽  
...  
Keyword(s):  
Phenolic Compounds ◽  
In Silico ◽  
Olive Tree ◽  
Tree Leaves ◽  
Olive Tree Leaves

scholarly journals First record of Bloodiella Nowicki, 1935 (Hymenoptera: Trichogrammatidae) from Italy

2019 ◽  
Vol 51 (3) ◽  
Author(s):  
G. Viggiani ◽  
F. Filella
Keyword(s):  
Olive Tree ◽  
Original Description ◽  
First Record ◽  
Egg Parasitoid ◽  
Tree Leaves ◽  
Olive Tree Leaves

From pieces of olive tree leaves with only egg clusters of Macrolenes dentipes (Olivier) (Coleoptera: Chrysomelidae), specimens of the trichogrammatid Bloodiella andalusiaca Nowicki (1935) emerged. This is the first record for the genus and the species from Italy. The original description of B. andalusiaca is reviewed and new characters are added. Hosts of this egg parasitoid are unknown, but our observations suggest that M. dentipes is a very possible candidate.

scholarly journals Antimicrobial activity of endophytic fungi from olive tree leaves

2017 ◽  
Vol 33 (3) ◽  
Author(s):  
Cynthia Malhadas ◽  
Ricardo Malheiro ◽  
José Alberto Pereira ◽  
Paula Guedes de Pinho ◽  
Paula Baptista
Keyword(s):  
Antimicrobial Activity ◽  
Endophytic Fungi ◽  
Olive Tree ◽  
Tree Leaves ◽  
Olive Tree Leaves

Supercritical fluid extraction of tocopherol concentrates from olive tree leaves

2002 ◽  
Vol 22 (3) ◽  
pp. 221-228 ◽  
Author(s):  
A de Lucas ◽  
E Martinez de la Ossa ◽  
J Rincón ◽  
M.A Blanco ◽  
I Gracia
Keyword(s):  
Supercritical Fluid Extraction ◽  
Supercritical Fluid ◽  
Olive Tree ◽  
Tree Leaves ◽  
Fluid Extraction ◽  
Olive Tree Leaves
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