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Green tea extract

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https://www.readbyqxmd.com/read/27904389/performance-of-different-natural-antioxidant-compounds%C3%A2-in-frying-oil
#1
Buket Aydenız, Emin Yilmaz
In this study, the natural green tea extract, purified lycopene, purified resveratrol and purified γ-oryzanol were added into peanut oil and their antioxidant performances were evaluated during frying. Moreover, the sensory properties of fried dough were evaluated to determine the consumption feasibility. All natural antioxidants led to significant increase in the stability of the oil samples. The ranges of measurements in the treatment groups were as follows: free acidity 0.1-2.9 g of oleic acid per 100 g of oil, conjugated dienes 0...
March 2016: Food Technology and Biotechnology
https://www.readbyqxmd.com/read/27903262/evaluation-of-salvadora-persica-l-and-green-tea-anti-plaque-effect-a-randomized-controlled-crossover-clinical-trial
#2
Hayder Raad Abdulbaqi, Wan Harun Himratul-Aznita, Nor Adinar Baharuddin
BACKGROUND: In the author's earlier in vitro investigation, a combination of 0.25 mg/ml green tea and 7.82 mg/ml Salvadora persica L. aqueous extracts was found to exhibit significant synergistic anti-bacterial and anti-adherence effects against primary plaque colonizers biofilm. A clinical trial was needed to support these preliminary in vitro results and to investigate its efficacy as a mouthwash in the control of dental plaque. METHODS: A 24 h plaque re-growth, double-blinded, randomized crossover trial was carried out...
December 1, 2016: BMC Complementary and Alternative Medicine
https://www.readbyqxmd.com/read/27897996/in-vitro-chemopreventive-properties-of-green-tea-rooibos-and-honeybush-extracts-in-skin-cells
#3
Tandeka U Magcwebeba, Pieter Swart, Sonja Swanevelder, Elizabeth Joubert, Wentzel C A Gelderblom
The chemopreventive properties of the herbal teas rooibos (Aspalathus linearis) and honeybush (Cyclopia spp.) have been demonstrated on mouse skin in vivo but the underlying mechanisms are not clear. The aim of the current study was to determine the anti-proliferative and pro-apoptotic activity of methanol and aqueous extracts of rooibos and two Cyclopia species in different skin cells, using green tea (Camellia sinensis) as a benchmark. Extracts were also characterised for their major individual polyphenols by high performance liquid chromatography and spectroscopically for the total polyphenol (TP) groups...
November 25, 2016: Molecules: a Journal of Synthetic Chemistry and Natural Product Chemistry
https://www.readbyqxmd.com/read/27894052/characterization-and-reactivity-of-iron-based-nanoparticles-synthesized-by-tea-extracts-under-various-atmospheres
#4
Jiewen Lin, Xiulan Weng, Rajarathnam Dharmarajan, Zuliang Chen
Bio-synthesis of Fe NPs in inert (nitrogen N-Fe NPs) and oxygen (O-Fe NPs) atmospheres employing green tea extracts was investigated through SEM, EDS, XPS and FT-IR techniques. The particle sizes of N-Fe NPs and O-Fe NPs were confirmed by SEM showing 84.7 ± 11.5 nm and 117.8 ± 26.2 nm respectively with subsequent evaluation of the percentage composition of Fe and O by EDS. The XPS results showed that the zero-valent iron and iron oxide nanoparticles were found to be dominant synthesized respectively in nitrogen and oxygen atmospheres...
November 25, 2016: Chemosphere
https://www.readbyqxmd.com/read/27883942/dye-degradation-by-green-heterogeneous-fenton-catalysts-prepared-in-presence-of-camellia-sinensis
#5
Samira S F Carvalho, Nakédia M F Carvalho
This work describes the synthesis and characterization of supported green iron catalysts, prepared with Camellia sinensis tea extract, and their application in heterogeneous Fenton degradation of pollutant dyes. The influence of the catalyst synthesis conditions in the iron and organic content were investigated by X-ray fluorescence and thermogravimetric analyses. Irregular, chain-like nanoparticles, in the size range of 20-100 nm, capped by polyphenolic natural compounds, were visualized by TEM micrographs...
November 21, 2016: Journal of Environmental Management
https://www.readbyqxmd.com/read/27883924/physiological-effects-of-epigallocatechin-3-gallate-egcg-on-energy-expenditure-for-prospective-fat-oxidation-in-humans-a-systematic-review-and-meta-analysis
#6
REVIEW
Mahendra P Kapoor, Masaaki Sugita, Yoshitaka Fukuzawa, Tsutomu Okubo
Green tea catechins (GTCs) are known to improve fat oxidation (FOX) during fasted, rested and exercise conditions wherein epigallocatechin-3-gallate (EGCG) is thought to be the most pharmacologically active and has been studied extensively. From the available data of randomized controlled trials (RCTs) on EGCG, we carried out a systematic review and meta-analysis to elucidate whether EGCG consumption indeed increase energy expenditure (EE) and promote FOX. A systematic review of the literature was conducted using electronic databases (PubMed, Embase, Cochrane Library, CINAHL, JICST, JSTPLUS, and JMEDPLUS and others) and eight RCTs were included...
November 2, 2016: Journal of Nutritional Biochemistry
https://www.readbyqxmd.com/read/27869750/biophysical-approach-to-mechanisms-of-cancer-prevention-and-treatment-with-green-tea-catechins
#7
REVIEW
Masami Suganuma, Atsushi Takahashi, Tatsuro Watanabe, Keisuke Iida, Takahisa Matsuzaki, Hiroshi Y Yoshikawa, Hirota Fujiki
Green tea catechin and green tea extract are now recognized as non-toxic cancer preventives for humans. We first review our brief historical development of green tea cancer prevention. Based on exciting evidence that green tea catechin, (-)-epigallocatechin gallate (EGCG) in drinking water inhibited lung metastasis of B16 melanoma cells, we and other researchers have studied the inhibitory mechanisms of metastasis with green tea catechins using biomechanical tools, atomic force microscopy (AFM) and microfluidic optical stretcher...
November 18, 2016: Molecules: a Journal of Synthetic Chemistry and Natural Product Chemistry
https://www.readbyqxmd.com/read/27855886/characterisation-of-odorants-in-roasted-stem-tea-using-gas-chromatography-mass-spectrometry-and-gas-chromatography-olfactometry-analysis
#8
Tetsuya Sasaki, Erina Koshi, Harumi Take, Toshihide Michihata, Masachika Maruya, Toshiki Enomoto
Roasted stem tea has a characteristic flavour, which is obtained by roasting tea stems, by-product of green tea production. This research aims to understand the characteristic odorants in roasted stem tea by comparing it to roasted leaf tea. We revealed potent odorants in commercial roasted stem tea using gas chromatography-mass spectrometry (GC-MS) and gas chromatography-olfactometry with aroma extract dilution analysis (AEDA). The difference between roasted stem and leaf tea derived from the same tea plants were investigated using GC-MS...
April 1, 2017: Food Chemistry
https://www.readbyqxmd.com/read/27846826/natural-product-htp-screening-for-antibacterial-e-coli-0157-h7-and-anti-inflammatory-agents-in-lps-from-e-coli-o111-b4-activated-macrophages-and-microglial-cells-focus-on-sepsis
#9
Elizabeth A Mazzio, Nan Li, David Bauer, Patricia Mendonca, Equar Taka, Mohammed Darb, Leeshawn Thomas, Henry Williams, Karam F A Soliman
BACKGROUND: Acute systemic inflammatory response syndrome arising from infection can lead to multiple organ failure and death, with greater susceptibility occurring in immunocompromised individuals. Moreover, sub-acute chronic inflammation is a contributor to the pathology of diverse degenerative diseases (Parkinson's disease, Alzheimer's disease and arthritis). Given the known limitations in Western medicine to treat a broad range of inflammatory related illness as well as the emergence of antibiotic resistance, there is a renewed interest in complementary and alternative medicines (CAMs) to achieve these means...
November 15, 2016: BMC Complementary and Alternative Medicine
https://www.readbyqxmd.com/read/27844057/combined-treatment-with-environmental-enrichment-and-epigallocatechin-3-gallate-ameliorates-learning-deficits-and-hippocampal-alterations-in-a-mouse-model-of-down-syndrome
#10
Silvina Catuara-Solarz, Jose Espinosa-Carrasco, Ionas Erb, Klaus Langohr, Juan Ramon Gonzalez, Cedric Notredame, Mara Dierssen
Intellectual disability in Down syndrome (DS) is accompanied by altered neuro-architecture, deficient synaptic plasticity, and excitation-inhibition imbalance in critical brain regions for learning and memory. Recently, we have demonstrated beneficial effects of a combined treatment with green tea extract containing (-)-epigallocatechin-3-gallate (EGCG) and cognitive stimulation in young adult DS individuals. Although we could reproduce the cognitive-enhancing effects in mouse models, the underlying mechanisms of these beneficial effects are unknown...
September 2016: ENeuro
https://www.readbyqxmd.com/read/27842804/development-and-characterisation-of-hpmc-films-containing-pla-nanoparticles-loaded-with-green-tea-extract-for-food-packaging-applications
#11
Magdalena Wrona, Marlene J Cran, Cristina Nerín, Stephen W Bigger
A novel active film material based on hydroxypropyl-methylcellulose (HPMC) containing poly(lactic acid) (PLA) nanoparticles (NPs) loaded with antioxidant (AO) green tea extract (GTE) was successfully developed. The PLA NPs were fabricated using an emulsification-solvent evaporation technique and the sizes were varied to enable a controlled release of the AO from the HPMC matrix. A statistical experimental design was used to optimise the synthesis of the NPs in order to obtain different sizes of nanoparticles and the loading of these into the HPMC matrix was also varied...
January 20, 2017: Carbohydrate Polymers
https://www.readbyqxmd.com/read/27825679/regulation-of-matrix-metalloproteinase-secretion-by-green-tea-catechins-in-a-three-dimensional-co-culture-model-of-macrophages-and-gingival-fibroblasts
#12
Marie-Pierre Morin, Daniel Grenier
OBJECTIVES: Elevated levels of matrix metalloproteinases (MMPs) have been associated with the active phases of tissue and bone destruction in periodontitis, an inflammatory disease characterized by a significant breakdown of tooth support. In the present study, we used a three-dimensional (3D) co-culture model of macrophages and gingival fibroblasts to investigate the ability of a green tea extract and its major constituent epigallocatechin-3-gallate (EGCG) to regulate the secretion of MMP-3, -8, and -9...
November 2, 2016: Archives of Oral Biology
https://www.readbyqxmd.com/read/27821943/green-tea-and-exercise-interventions-as-nondrug-remedies-in-geriatric-patients-with-rheumatoid-arthritis
#13
Ahmad H Alghadir, Sami A Gabr, Einas S Al-Eisa
This study aimed to evaluate the effects of green tea and supervised exercise training interventions on improvement of disease activity and bone metabolism markers in rheumatoid arthritis patients. [Subjects and Methods] One-hundred and twenty subjects who had a mean age of (60.7 ± 2.53 years) and had been diagnosed with rheumatoid arthritis at least ten years previously were randomly included in this study. Patients were treated with infliximab, green tea, or a supervised exercise program for six months...
October 2016: Journal of Physical Therapy Science
https://www.readbyqxmd.com/read/27813697/radioprotective-effect-of-green-tea-and-grape-seed-extracts-mixture-on-gamma-irradiation-induced-immune-suppression-in-male-albino-rats
#14
W El-Desouky, A H Mahmoud, M M Abbas
: Green tea extract (GTE) and grape seed extract (GSE) have antioxidant and radioprotective effects. The current study aimed to investigate the radioprotective effect of GTE and GSE mixture on radiation induced immune suppression in rats. METHOD: 35 male albino rats were divided into five groups: group 1 (control rats). The 2(nd) and 3(rd) groups rats were exposed to a single dose of gamma radiation (5 and 10Gy) respectively. The 4(th) and 5(th) groups of rats were gamma irradiated with 5 and 10Gy respectively, then administrated by gavage with GTE and GSE mixture (100 mg: 200 mg/kg B...
November 4, 2016: International Journal of Radiation Biology
https://www.readbyqxmd.com/read/27808339/differentiated-caco-2-cell-monolayers-exhibit-adaptation-in-the-transport-and-metabolism-of-flavan-3-ols-with-chronic-exposure-to-both-isolated-flavan-3-ols-and-enriched-extracts
#15
Benjamin W Redan, Mohammad Chegeni, Mario G Ferruzzi
The relatively low oral bioavailability of flavan-3-ols from acute doses is commonly highlighted as a limitation when considering the biological significance of these compounds. However, evidence suggests that the absorption of flavan-3-ols may be enhanced during periods of repeated exposure which is more representative of dietary patterns. To explore changes occurring in the upper small intestine from repeated exposure to dietary flavan-3-ols, Caco-2 human intestinal cells were cultured and differentiated in the presence of isolated flavan-3-ols epigallocatechin gallate (EGCG) and epicatechin (EC) or flavan-3-ol-rich green tea and grape seed extracts...
November 3, 2016: Food & Function
https://www.readbyqxmd.com/read/27806972/effects-of-green-tea-catechin-extract-on-serum-lipids-in-postmenopausal-women-a-randomized-placebo-controlled-clinical-trial
#16
Hamed Samavat, April R Newman, Renwei Wang, Jian-Min Yuan, Anna H Wu, Mindy S Kurzer
BACKGROUND: Green tea has been suggested to improve cardiovascular disease risk factors, including circulating lipid variables. However, current evidence is predominantly based on small, short-term randomized controlled trials conducted in diverse populations. OBJECTIVE: The aim of this study was to examine the efficacy and impact of green tea extract (GTE) supplementation high in epigallocatechin gallate (EGCG) on blood lipids in healthy postmenopausal women. DESIGN: This was an ancillary study of a double-blind, randomized, placebo-controlled, parallel-arm trial investigating the effects of a GTE supplement containing 1315 mg catechins (843 mg EGCG) on biomarkers of breast cancer risk...
November 2, 2016: American Journal of Clinical Nutrition
https://www.readbyqxmd.com/read/27805619/liver-related-safety-assessment-of-green-tea-extracts-in-humans-a-systematic-review-of-randomized-controlled-trials
#17
T Isomura, S Suzuki, H Origasa, A Hosono, M Suzuki, T Sawada, S Terao, Y Muto, T Koga
No abstract text is available yet for this article.
November 2016: European Journal of Clinical Nutrition
https://www.readbyqxmd.com/read/27797683/short-term-effects-of-green-tea-on-blood-pressure-endothelial-function-and-metabolic-profile-in-obese-prehypertensive-women-a-crossover-randomized-clinical-trial
#18
Lívia de P Nogueira, José Firmino Nogueira Neto, Márcia R S T Klein, Antonio F Sanjuliani
BACKGROUND: Green tea consumption has been inversely associated with cardiovascular disease (CVD) in epidemiological studies. Although some interventional trials suggest that green tea has beneficial effects on CVD risk factors, such as hypertension and obesity, others have failed to show such benefits. AIMS: To evaluate the short-term effects of green tea on blood pressure, endothelial function, metabolic profile, and inflammatory activity in obese prehypertensive women...
October 31, 2016: Journal of the American College of Nutrition
https://www.readbyqxmd.com/read/27794395/arginine-kinase-in-toxocara-canis-exon-intron-organization-functional-analysis-of-site-directed-mutants-and-evaluation-of-putative-enzyme-inhibitors
#19
Susiji Wickramasinghe, Lalani Yatawara, Mitsuru Nagataki, Takeshi Agatsuma
OBJECTIVES: To determine exon/intron organization of the Toxocara canis (T. canis) AK (TCAK) and to test green and black tea and several other chemicals against the activity of recombinant TCAK in the guanidino-specific region by site-directed mutants. METHODS: Amplification of genomic DNA fragments containing introns was carried out by PCRs. The open-reading frame (1200 bp) of TCAK (wild type) was cloned into the BamH1/SalI site of pMAL-c2X. The maltose-binding protein-TCAK fusion protein was expressed in Escherichia coli TB1 cells...
October 2016: Asian Pacific Journal of Tropical Medicine
https://www.readbyqxmd.com/read/27790260/the-in-vitro-antibacterial-efficacy-of-persian-green-tea-extract-as-an-intracanal-irrigant-on-enterococcus-faecalis-biofilm
#20
Fatemeh Ramezanali, Shiva Samimi, Mohammadjavad Kharazifard, Farzaneh Afkhami
INTRODUCTION: The aim of this study was to compare the antibacterial effect of Persian green tea extract (GTE) and 2.5% sodium hypochlorite (NaOCl) against Enterococcus faecalis (E. faecalis) as an intracanal irrigant. METHODS AND MATERIALS: Thirty freshly extracted teeth were instrumented and sectioned into mesial and distal segments. The specimens were put into wells containing 2 mL of E. faecalis-containing medium. After 3 weeks, the specimens were removed and divided randomly into three groups (n=20)...
2016: Iranian Endodontic Journal
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