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olive leaf

Lixing Wu, Yuyu Xu, Zhijian Yang, Qing Feng
Myocardial infarction triggers massive biochemical changes, even cardiac cell death. Endoplasmic reticulum stress is involved in the pathology of myocardial infarction-mediated apoptosis. In the present study, myocardial cell line H9c2 cells were treated with cobalt chloride (CoCl2 ) to induce hypoxia. Isoproterenol was used for two successive days to induce myocardial infarction in SD rats. The cardioprotective effect of olive leaf extract (OLE) and its main constituent hydroxytyrosol and the underlying mechanisms were evaluated...
November 1, 2017: Journal of Biomedical Research
Julia K Nuy, Anja Lange, Arne J Beermann, Manfred Jensen, Vasco Elbrecht, Oliver Röhl, Derek Peršoh, Dominik Begerow, Florian Leese, Jens Boenigk
Stream ecosystems are affected by multiple anthropogenic stressors worldwide. Even though effects of many single stressors are comparatively well studied, the effects of multiple stressors are difficult to predict. In particular bacteria and protists, which are responsible for the majority of ecosystem respiration and element flows, are infrequently studied with respect to multiple stressors responses. We conducted a stream mesocosm experiment to characterize the responses of single and multiple stressors on microbiota...
August 15, 2018: Science of the Total Environment
Maria Serena Chiriacò, Andrea Luvisi, Elisabetta Primiceri, Erika Sabella, Luigi De Bellis, Giuseppe Maruccio
Xylella fastidiosa subsp. pauca strain CoDiRO, a pathogen responsible for Olive Quick Decline Syndrome (OQDS), is strongly threatening the agricultural-based economy of South Italy and making its typical landscape collapse. The bacteria can also infect more than other twenty woody or shrub species and quarantine programs are carried out in Italy. Since symptoms of OQDS like leaf scorching and wilting of canopy may appear several months after infection and some hosts are asymptomatic, a tool for the rapid and early screening of plants is desirable, in order to plan a sudden control strategy and apply programs for pest management...
May 9, 2018: Scientific Reports
Maya Gobin, Jeremy Hawker, Paul Cleary, Thomas Inns, Daniel Gardiner, Amy Mikhail, Jacquelyn McCormick, Richard Elson, Derren Ready, Tim Dallman, Iain Roddick, Ian Hall, Caroline Willis, Paul Crook, Gauri Godbole, Drazenka Tubin-Delic, Isabel Oliver
We investigated a large outbreak of Escherichia coli O157 in the United Kingdom (UK) with 165 cases between 31 May and 29 July 2016. No linked cases were reported in other countries. Cases were predominately female (n = 128) and adult (n = 150), 66 attended hospital and nine had features of haemorrhagic uraemic syndrome. A series of epidemiological studies (case-control, case-case, ingredients-based and venue-based studies) and supply chain investigations implicated mixed salad leaves from Supplier A as the likely outbreak vehicle...
May 2018: Euro Surveillance: Bulletin Européen sur les Maladies Transmissibles, European Communicable Disease Bulletin
Graziana Difonzo, Antonella Pasqualone, Roccangelo Silletti, Lucrezia Cosmai, Carmine Summo, Vito M Paradiso, Francesco Caponio
Olive leaves are a waste of the olive oil processing industry and represent a good source of phenolic compounds. The aim of this work was to assess the influence of olive leaf extract (OLE) on lipid oxidation of baked snacks, like breadsticks, made with wheat flour, extra virgin olive oil (EVO), white wine, and salt. Two EVOs having different peroxide value and antioxidant profile (total phenol content, tocopherols, carotenoids, and antioxidant activity) were considered. The snacks were subjected to oven test or stored in the usual conditions of retailer shelves...
June 2018: Food Research International
Esin Baba, Ümit Acar, Sevdan Yılmaz, Fahriye Zemheri, Sebahattin Ergün
The aim for the present study was to investigate the effects of olive leaf (Olea europea L.) extract (OLE) on the control of Yersinia ruckeri infection in rainbow (Oncorhynchus mykiss) trout and to assess the impact on the expression of immune-related genes in the spleen and serum biochemical parameters of rainbow trout. Five experimental diets were prepared by adding 0.0%, 0.1%, 0.25%, 0.50% and 1.0% of OLE. Each diet was fed to triplicate groups of fish (mean body weight 51.22 ± 3.04 g) twice a day (at 09:00 and 17:00 h) for 60 days...
May 4, 2018: Fish & Shellfish Immunology
Ali Candar, Hakan Demirci, Ayse Karalar Baran, Yakup Akpınar
AIM: In the current study, we aimed to evaluate the relationship between life quality and use of complementary and alternative medicine (CAM) in patients with diabetes mellitus. METHODS: The Audit of Diabetes-Dependent Quality of Life (ADDQOL-19) scale was applied to 453 diabetic patients. Socio-demographic characteristics of the patients and their CAM usage were recorded. RESULTS: The rate of CAM use among diabetic patients was 46.1%. The most preferred practices were herbal medicine, including black cumin (26...
May 2018: Complementary Therapies in Clinical Practice
Cátia Brito, Lia-Tânia Dinis, Helena Ferreira, José Moutinho-Pereira, Carlos Correia
The climate change scenarios besides foreseeing a severe drought imposition also emphasize the temperature rising in the Mediterranean region, with special prominence at nighttime. Despite the high olive tree tolerance to severe environmental conditions, stomatal nighttime water loss can change plant water relations, and the related consequences and opportunities, especially under water scarcity, must be clarified. A set of 3-year-old potted olive trees were subjected to three cycles of drought, imposed by withholding irrigation, while another group were continuously irrigated...
April 12, 2018: Journal of Plant Physiology
Jikun Xu, Huijie Hou, Jingping Hu, Bingchuan Liu
Microwave-induced technique was combined with response surface methodology for optimizing the isolation of polysaccharides from Eucommia ulmoides Oliver leaf. The maximum polysaccharides yield of 12.31% was achieved by microwave extraction at 74 °C for 15 min with a solid to liquid ratio of 1:29 g/mL, which agreed with the predicted value and was 2.9-fold higher than that of the conventional heat-reflux extraction method. The dominant bioactive constituent in extracts was chlorogenic acid (1.3-1.9%), followed by geniposidic acid (1...
April 26, 2018: Scientific Reports
Natalie P Bonvino, Julia Liang, Elizabeth D McCord, Elena Zafiris, Natalia Benetti, Nancy B Ray, Andrew Hung, Dimitrios Boskou, Tom C Karagiannis
Accumulated epidemiological, clinical and experimental evidence has indicated the beneficial health effects of the Mediterranean diet, which is typified by the consumption of virgin olive oil (VOO) as a main source of dietary fat. At the cellular level, compounds derived from various olive (Olea europaea), matrices, have demonstrated potent antioxidant and anti-inflammatory effects, which are thought to account, at least in part, for their biological effects. Research efforts are expanding into the characterization of compounds derived from Olea europaea, however, the considerable diversity and complexity of the vast array of chemical compounds have made their precise identification and quantification challenging...
January 1, 2018: Database: the Journal of Biological Databases and Curation
Rawya Soussi, Najla Hfaiedh, Fatma Guesmi, Mohsen Sakly, Khémais Ben Rhouma
Historically, olive tree "Olea europaea" is one of the most important fruit trees in Mediterranean countries. Several studies suggest that olive leaf is a significant source of bioactive phenolic compounds compared to olive oil and fruits. This study was undertaken to investigate, the protective effect of the aqueous extract of « Chemlali » olive leaves against diclofenac-induced damages in liver and haematological alterations in swiss albinos mice. For this, twenty-eight mice were divided into four groups: a control group, a diclofenac-treated group (2...
April 20, 2018: Applied Physiology, Nutrition, and Metabolism, Physiologie Appliquée, Nutrition et Métabolisme
Sally Padhi, Itamar Dias, Victoria L Korn, Joan W Bennett
White-nose syndrome (WNS) is caused by Pseudogymnoascus destructans , a psychrophilic fungus that infects hibernating bats and has caused a serious decline in some species. Natural aroma compounds have been used to control growth of fungal food storage pathogens, so we hypothesized that a similar strategy could work for control of P. destructans . The effectiveness of exposure to low concentrations of the vapor phase of four of these compounds was tested on mycelial plugs and conidiospores at temperatures of 5, 10 and 15 °C...
April 10, 2018: Journal of Fungi (Basel, Switzerland)
Ludwi Rodríguez-Hernandez, Humberto Nájera-Gomez, Celína Luján-Hidalgo, Nancy Ruiz-Lau, Carlos Alberto Lecona-Guzmán, Miguel Abud-Archila, Víctor Manuel Ruíz-Valdiviezo, Federico Antonio Gutiérrez-Miceli
Olive trees are one of the most important oil crops in the world due to the sensorial and nutritional characteristics of olive oil, such as lipid composition and antioxidant content, and the medicinal properties of its leaves. In this paper, callus formation was induced using nodal segments of olive tree (Olea europaea cv cornicabra) as explants. Fatty acid profile, total phenolic compounds and total flavonoid compounds were determined in callus culture after 15 weeks and compared with leaf and nodal segments tissues...
April 9, 2018: Journal of Oleo Science
Jardel L Pereira, Tarcísio V S Galdino, Geverson A R Silva, Marcelo C Picanço, Antônio A Silva, Alberto S Corrêa, Júlio C Martins
This study aimed to assess the glyphosate application effects on the Cerotoma arcuata Oliver (Coleoptera: Chrysomelidae) population in glyphosate-resistant soybean crops. Field studies were conducted with glyphosate and the insecticide endosulfan to observe the effects of these pesticides on C. arcuata, on its damages in the crop and on the populations of natural enemies in glyphosate-resistant soybean crops. Moreover, the lethal and behavioral sublethal response of C. arcuata to glyphosate and endosulfan was conducted in the laboratory...
April 6, 2018: Journal of Environmental Science and Health. Part. B, Pesticides, Food Contaminants, and Agricultural Wastes
Sophie Fauset, Helber C Freitas, David R Galbraith, Martin J P Sullivan, Marcos P M Aidar, Carlos A Joly, Oliver L Phillips, Simone A Vieira, Manuel U Gloor
Given anticipated climate changes, it is crucial to understand controls on leaf temperatures including variation between species in diverse ecosystems. In the first study of leaf energy balance in tropical montane forests, we observed current leaf temperature patterns on three tree species in the Atlantic forest, Brazil, over a 10-day period, and assessed whether and why patterns may vary among species. We found large leaf-to-air temperature differences (maximum 18.3°C) and high leaf temperatures (over 35°C) despite much lower air temperatures (maximum 22°C)...
March 30, 2018: Plant, Cell & Environment
Maruyama Takuma, Kamihama Haruka, Watanabe Mutsuto, Matsuo Toshiki, Matsuda Kenshiro, Tanaka Akane, Matsuda Hiroshi, Nomura Yoshihiro
The chondroprotective effect of olive leaf extract (OLE) on knee osteoarthritis (OA) was studied with STR/ort mice (n = 5). OLE was administrated with a dosage of 100 mg/kg for 8 weeks and the OA severity score of hind limb knee joints was then measured. The Mankin scores of the knee joints of the non-OA control group, OA control group and OLE-treated group were 3.50, 11.13 and 7.20, respectively. This suggests that oral OLE supplements help prevent cartilage degeneration in STR/ort mice. In vitro, the synthesis of high molecular weight hyaluronan in synovial cells (HIG-82) was increased by OLE stimulation...
March 27, 2018: Bioscience, Biotechnology, and Biochemistry
Ricardo Malheiro, Susana Casal, Nuno Rodrigues, Catherine M G C Renard, José Alberto Pereira
This study focused on the volatile changes in cv. Verdeal Transmontana throughout the entire olive oil processing chain, from the drupe to olive oil storage up to 12 months, while correlating it with quality parameters and sensory quality. During crushing and malaxation, the volatiles formed were mainly "green-leaf volatiles" (GLVs), namely (E)-2-hexenal, hexanal, and 1-hexanol. Centrifugation and clarification steps increased the total volatile amounts to 130 mg kg-1 . However, clarification also increased nonanal and (E)-2-decenal contents, two markers of oxidation, with a noticeable loss of phenolic compounds and oxidative stability...
April 2018: Food Research International
Huawei Liu, Ke Li, Jinshan Zhao, Wen Deng
To investigate the effects of polyphenolic extract from Eucommia ulmoides Oliver leaf (PEEU) on growth performance, digestibility, rumen fermentation and antioxidant status of fattening lambs, 30 weaned male Huzhou lambs were equally divided into three treatments and fed the basal diet supplemented with 0 (CON), 5 (PEEU5) or 10 (PEEU10) g/kg PEEU. Dietary PEEU supplementation did not affect growth performance and apparent digestibility of nutrients. Compared with the CON group, lambs in the PEEU10 group had lower ammonia nitrogen concentration (p < ...
March 24, 2018: Animal Science Journal, Nihon Chikusan Gakkaihō
Wen-Ping Huang, Ting Tan, Zhi-Feng Li, Hui OuYang, Xu Xu, Bin Zhou, Yu-Lin Feng
The Chimonanthus nitens Oliv. leaf (CNOL). is a widely used traditional Chinese medicine (TCM) used for treating colds and influenza. In the present study, a comprehensive strategy integrating multiple chromatographic analysis and chemometric methods was firstly proposed for structural characterization and discrimination of CNOL from different geographical origins. It consists of three steps: Firstly, the ultra-high-performance liquid chromatography quadrupole time-of-flight tandem mass spectrometry (UHPLC-QTOF-MS/MS) method was applied for comprehensive profiling of characterization constituents in CNOL by high-resolution diagnostic product ions/neutral loss filtering, and a total of 40 constituents were identified...
February 10, 2018: Journal of Pharmaceutical and Biomedical Analysis
Saskia Knillmann, Polina Orlinskiy, Oliver Kaske, Kaarina Foit, Matthias Liess
The agricultural use of pesticides leads to environmentally relevant pesticide concentrations that cause adverse effects on stream ecosystems. These effects on invertebrate community composition can be identified by the bio-indicator SPEARpesticides . However, refuge areas have been found to partly confound the indicator. On the basis of three monitoring campaigns of 41 sites in Central Germany, we identified 11 refuge taxa. The refuge taxa, mainly characterized by dispersal-based resilience, were observed only nearby uncontaminated stream sections and independent of the level of pesticide pressure...
March 9, 2018: Science of the Total Environment
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