C-geranylated flavanones from YingDe black tea and their antioxidant and α-glucosidase inhibition activities
Publication date: 15 November 2017 Source:Food Chemistry, Volume 235 Author(s): Hua Zhou, Hai-Mei Li, Yang-Min Du, Ri-An Yan, Shi-Yi Ou, Tian-Feng Chen, Yong Wang, Li-Xin Zhou, Liang Fu YingDe black tea is produced from crude tea prepared from leaves of Camellia sinensis var. assamica. In this work, we isolated and identified five novel flavanones, namely, amelliaone A–E (1–5), along with seven known compounds 6–12 from the ethanol extract of YingDe black tea. The structures of these five novel phenolic compounds were determined using extensive 1D and 2D nuclear magnetic resonance spectroscopy experiments....
Source: Food Chemistry - May 19, 2017 Category: Food Science Source Type: research
Proteomic analysis of tea plants ( < i > Camellia sinensis < /i > ) with purple young shoots during leaf development
This study developed a proteome reference map related to color changes during leaf growth in tea (Camellia sinensis) plant with purple young shoots using two-dimensional electrophoresis (2-DE). Forty-six differentially expressed proteins were detected in the gel and successfully identified by using MALDI-TOF/TOF-MS. The pronounced changes in the proteomic profile between tender purple leaves (TPL) and mature green leaves (MGL) included: 1) the lower activity of proteins associated with CO2 assimilation, energy metabolism and photo flux efficiency and higher content of anthocyanins in TPL than those in MGL may protect tende...
Source: PLoS One - May 16, 2017 Category: Biomedical Science Authors: Qiongqiong Zhou Source Type: research
Calcinated tea and cellulose composite films and its dielectric and lead adsorption properties
Publication date: 1 September 2017 Source:Carbohydrate Polymers, Volume 171 Author(s): Tippabattini Jayaramudu, Kokkarachedu Varaprasad, Hyun Chan Kim, Abdullahil Kafy, Jung Woong Kim, Jaehwan Kim In this paper, calcinated tea and cellulose composite (CTCC) films were fabricated via solution casting method. Chemical structure, morphology, crystallinity and thermal stability of the fabricated films were characterized by using Fourier transform infrared spectroscopy, scanning electron microscopy, X-ray diffraction and thermogravimetric analysis. The effect of calcinated tea loading on the properties of the prepared C...
Source: Carbohydrate Polymers - May 14, 2017 Category: Biomedical Science Source Type: research
Association between tea consumption and risk of cognitive disorders: A dose-response meta-analysis of observational studies.
CONCLUSIONS: Tea consumption is inversely and linearly related to the risk of cognitive disorders. More studies are needed to further confirm our findings.
PMID: 28496007 [PubMed - as supplied by publisher] (Source: Oncotarget)
Source: Oncotarget - May 13, 2017 Category: Cancer & Oncology Tags: Oncotarget Source Type: research
Anti-obesity effects of tea from Mangifera indica L. leaves of the Ub á variety in high-fat diet-induced obese rats.
Anti-obesity effects of tea from Mangifera indica L. leaves of the Ubá variety in high-fat diet-induced obese rats.
Biomed Pharmacother. 2017 May 13;91:938-945
Authors: Ramírez NM, Toledo RCL, Moreira MEC, Martino HSD, Benjamin LDA, de Queiroz JH, Ribeiro AQ, Ribeiro SMR
Abstract
Due to the high content of bioactive compounds, herbal teas are being investigated as adjuvant in chronic disease management. Studies have shown that mango leaf tea contain mangiferin, total phenolics and antioxidants, compounds with many functional properties. Therefore, this study aims to evaluate the...
Source: Biomedicine and pharmacotherapy = Biomedecine and pharmacotherapie - May 13, 2017 Category: Drugs & Pharmacology Authors: Ramírez NM, Toledo RCL, Moreira MEC, Martino HSD, Benjamin LDA, de Queiroz JH, Ribeiro AQ, Ribeiro SMR Tags: Biomed Pharmacother Source Type: research
Leopard in a tea-cup: A study of leopard habitat-use and human-leopard interactions in north-eastern India
by Aritra Kshettry, Srinivas Vaidyanathan, Vidya Athreya
There is increasing evidence of the importance of multi-use landscapes for the conservation of large carnivores. However, when carnivore ranges overlap with high density of humans, there are often serious conservation challenges. This is especially true in countries like India where loss of people s’ lives and property to large wildlife are not uncommon. The leopard (Panthera pardus) is a large felid that is widespread in India, often sharing landscapes with high human densities. In order to understand the ecology of leopards in a human use landscape and the natur...
Source: PLoS One - May 11, 2017 Category: Biomedical Science Authors: Aritra Kshettry Source Type: research
Short-term effects of green tea chronotherapy on the metabolic homeostasis of mice on different diets.
The objective of this study was to evaluate how the administration of C. sinensis at different times of day influenced changes in body weight, blood glucose levels, and food intake of mice kept under different diet conditions. The structural organization of abdominal adipose tissue was also evaluated, as were certain aspects of lipid metabolism and overall synthetic activity in the liver, adipose tissue, and ovaries. The results obtained suggest that the intake of green tea in the light phase of the day stimulates weight loss, regardless of the diet ingested. Neither glucose levels nor the structural organization of adipos...
Source: Genetics and Molecular Research - May 10, 2017 Category: Genetics & Stem Cells Authors: Amorim RP, Daher IP, Arcangelo FPD, Bellini MF, Orcini WA, Sarria GR, Peruquetti RL Tags: Genet Mol Res Source Type: research
Comparison of the Streptococcus mutans and Lactobacillus colony count changes in saliva following chlorhexidine (0.12 & #37;) mouth rinse, combination mouth rinse, and green tea extract (0.5 & #37;) mouth rinse in children
Conclusion: Green tea mouth rinse can be a promising preventive therapy worldwide for the prevention of dental caries. (Source: Journal of Indian Society of Pedodontics and Preventive Dentistry)
Source: Journal of Indian Society of Pedodontics and Preventive Dentistry - May 10, 2017 Category: Dentistry Authors: Rahul J Hegde Shamika Kamath Source Type: research
Oxidative stress-induced Akt downregulation mediates green tea toxicity towards prostate cancer cells.
This study was designed to investigate the impact of PE on prostate cancer cells (PC3), analyze the potential signals involved and elucidate whether anti- or pro-oxidant effects may be implicated. Treatment of PC3 cells with 30 and 100μg/ml PE significantly decreased cell viability and proliferation. At the tested concentrations, PE did not exert any antioxidant activity, eliciting instead a pro-oxidant effect at concentrations 30 and 100μg/ml, which was consistent with the observed PE cytotoxicity. PE-induced cell death was associated with mitochondrial dysfunction and downregulation of Akt activation, thus suggesting t...
Source: Toxicology in Vitro - May 7, 2017 Category: Toxicology Authors: Posadino AM, Phu HT, Cossu A, Giordo R, Fois M, Thuan DTB, Piga A, Sotgia S, Zinellu A, Carru C, Pintus G Tags: Toxicol In Vitro Source Type: research
Effect of steeping temperature on antioxidant and inhibitory activities of green tea extracts against α-amylase, α-glucosidase and intestinal glucose uptake
The objective of the present study was to evaluate the effect of steeping temperature on the biological activities of green tea, including the 1,1-diphenyl-2-picrylhydrazyl (DPPH) radical-scavenging capacity, α-glucosidase and α-amylase inhibitory activities, and glucose uptake inhibitory activity in Caco-2 cells. Results showed that, with increasing extraction temperature, the polyphenol content increased, which contributed to enhance antioxidant activity and inhibitory effects on α-glucosidase and α-amylase. Green tea steeped at 100°C showed the highest DPPH radical-scavenging activity and inhibitory effects on α-g...
Source: Food Chemistry - May 6, 2017 Category: Food Science Source Type: research
Parental smoking, maternal alcohol, coffee and tea consumption and the risk of childhood brain tumours: the ESTELLE and ESCALE studies (SFCE, France)
ConclusionWe found some evidence of a weak association between paternal smoking in the year before the child ’s birth and CBT, especially astrocytomas. These findings need to be replicated in other samples, using similar classifications of tumour subtypes. (Source: Cancer Causes and Control)
Source: Cancer Causes and Control - May 5, 2017 Category: Cancer & Oncology Source Type: research
Sensors, Vol. 17, Pages 1007: A Framework for the Multi-Level Fusion of Electronic Nose and Electronic Tongue for Tea Quality Assessment
In this study, a framework for a multi-level fusion strategy of electronic nose and electronic tongue was proposed to enhance the tea quality prediction accuracies, by simultaneously modeling feature fusion and decision fusion. The procedure included feature-level fusion (fuse the time-domain based feature and frequency-domain based feature) and decision-level fusion (D-S evidence to combine the classification results from multiple classifiers). The experiments were conducted on tea samples collected from various tea providers with four grades. The large quantity made the quality assessment task very difficult, and the exp...
Source: Sensors - May 3, 2017 Category: Biotechnology Authors: Ruicong Zhi Lei Zhao Dezheng Zhang Tags: Article Source Type: research
Corneal Staining and Hot Black Tea Compresses.
CONCLUSIONS: An intact corneal epithelium serves as an effective barrier against tea-stain discoloration. Only when this layer is disrupted does the damage occur. Therefore, direct application of black tea (Camellia sinensis) to a cornea with an epithelial defect should be avoided.
PMID: 28457091 [PubMed - in process] (Source: The Israel Medical Association Journal)
Source: The Israel Medical Association Journal - May 1, 2017 Category: Journals (General) Tags: Isr Med Assoc J Source Type: research
Effects of chronic consumption of green tea on weight and body fat distribution of Wistar rats evaluated by computed tomography.
Conclusions: : Chronic consumption of green tea leads to decreased visceral adipose tissue area.
PMID: 28591363 [PubMed - in process] (Source: Acta Cirurgica Brasileira)
Source: Acta Cirurgica Brasileira - May 1, 2017 Category: Surgery Authors: Raso RA, Paim RRB, Pinheiro SVB, Tavares WC, Vasconcellos LS, Alberti LR Tags: Acta Cir Bras Source Type: research
Tea consumption and the risk of biliary tract cancer: a systematic review and dose-response meta-analysis of observational studies.
Authors: Xiong J, Lin J, Wang A, Wang Y, Zheng Y, Sang X, Xu Y, Lu X, Zhao H
Abstract
Recent studies have shown that tea consumption is associated with the reduced incidence of some types of cancer, possibly including biliary tract cancer. However, the epidemiological evidences for the association with risk of biliary tract cancer are contradictory. Thus, we performed meta-analysis of published observational studies to assess the association between tea consumption and risk of biliary tract cancer. Relevant studies were identified by searching PubMed, EMBASE, and ISI Web of Science published before October...
Source: Oncotarget - April 30, 2017 Category: Cancer & Oncology Tags: Oncotarget Source Type: research
