نتایج جستجو برای: polyphenols

تعداد نتایج: 10827  

2016
Fatemeh Moosavi Razieh Hosseini Luciano Saso Omidreza Firuzi

Polyphenols are an important class of phytochemicals, and several lines of evidence have demonstrated their beneficial effects in the context of a number of pathologies including neurodegenerative disorders such as Alzheimer's and Parkinson's disease. In this report, we review the studies on the effects of polyphenols on neuronal survival, growth, proliferation and differentiation, and the sign...

Journal: :iranian journal of pharmaceutical research 0
safa daoud university of jordan fatma u afifi university of jordan amal al-bakrib university of jordan violet kasabric kasabri university of jordan imad hamdan university of jordan

abstractthe ability of hesperidin (hp) to form complexes with five metals; cobalt, nickel, zinc, calcium and magnesium was investigated. the complexation was studied using u.v spectroscopic titration, in methanol as well as aqueous buffer solutions (physiological conditions). potential complexes were studied by ir and nmr spectroscopy, melting point and their solubility were also evaluated. the...

2011
R. Keyrouz

The role of polyphenols as antioxidants in our daily nutrition has been extensively investigated, but information on composition of tannins from marine sources on nutrient utilisation is limited. This study will be focused on the determination of the polyphenol quantities in brown seaweeds from Brittany coast in France; the extracts were delivered from algae centre for valorisation (CEVA), and ...

2011
Harvey Babich Alyssa G. Schuck Jeffrey H. Weisburg Harriet L. Zuckerbraun

Polyphenols of phytochemicals are thought to exhibit chemopreventive effects against cancer. These plant-derived antioxidant polyphenols have a dual nature, also acting as pro-oxidants, generating reactive oxygen species (ROS), and causing oxidative stress. When studying the overall cytotoxicity of polyphenols, research strategies need to distinguish the cytotoxic component derived from the pol...

Journal: :Molecules 2014
Wei-Min Zhang Wu-Yang Huang Wen-Xue Chen Lin Han Hai-De Zhang

Polyphenols are functional compounds in plants, which possess many bioactivities beneficial for humans. The aim of this study was to establish a highly efficient method for extracting polyphenol compounds from areca seeds and further to identify polyphenols and antioxidant properties of the seeds. A quadratic general rotary unitized design was used to determine the optimal extraction process. T...

2007
Marek A. Naruszewicz Grażyna J. Nowicka

Vascular endothelium dysfunction is the basic cause of development of cardiovascular disorders and is charac-terised by bioactive NO deficiency. Oxidative stress induced by the generally known atherosclerosis risk factors such as smoking, hypercholesterolaemia, hypertension, diabetes etc. was found to contribute to low bioavailabil-ity of NO. The present investigations indicate that polyphenols...

2017
G. Williamson

Polyphenols are found in plant-based foods and beverages, notably apples, berries, citrus fruit, plums, broccoli, cocoa, tea and coffee and many others. There is substantial epidemiological evidence that a diet high in polyphenol-rich fruit, vegetables, cocoa and beverages protects against developing cardiovascular disease and type 2 diabetes. The absorption and metabolism of these compounds ha...

Journal: :The American journal of clinical nutrition 2005
Claudine Manach Gary Williamson Christine Morand Augustin Scalbert Christian Rémésy

Polyphenols are abundant micronutrients in our diet, and evidence for their role in the prevention of degenerative diseases is emerging. Bioavailability differs greatly from one polyphenol to another, so that the most abundant polyphenols in our diet are not necessarily those leading to the highest concentrations of active metabolites in target tissues. Mean values for the maximal plasma concen...

Journal: :The British journal of nutrition 2014
Jonathan M Hodgson Kevin D Croft Richard J Woodman Ian B Puddey Catherine P Bondonno Jason H Y Wu Lawrence J Beilin Elena V Lukoshkova Geoffrey A Head Natalie C Ward

High blood pressure (BP) variability, which may be an important determinant of hypertensive end-organ damage, is emerging as an important predictor of cardiovascular health. Dietary antioxidants can influence BP, but their effects on variability are yet to be investigated. The aim of the present study was to assess the effects of vitamin E, vitamin C and polyphenols on the rate of daytime and n...

2013
Amani A Mahbub Christine L. Le Maitre Sarah L. Haywood-Small Gordon J. McDougall Neil A. Cross Nicola Jordan-Mahy

BACKGROUND Mortality rates for leukemia are high despite considerable improvements in treatment. Since polyphenols exert pro-apoptotic effects in solid tumors, our study investigated the effects of polyphenols in haematological malignancies. The effect of eight polyphenols (quercetin, chrysin, apigenin, emodin, aloe-emodin, rhein, cis-stilbene and trans-stilbene) were studied on cell proliferat...

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