Evaluation of Macro- and Microelement Levels in Black Tea in View of Its Geographical Origin.
Abstract
The aim of this study was to evaluate the elemental composition of black tea samples and their infusions in view of their geographical origin. In total, 14 elements were analyzed, 13 (Ca, K, Mg, Na, Mn, Fe, Zn, Cu, Cr, Ni, Co, Cd, and Pb) by flame atomic absorption spectrometry, and P by UV-Vis spectrometry, after mineralization of samples. It was found that K was the most abundant macroelement in the analyzed samples, whereas among microelements, the highest concentration was found for Mn. Based on the obtained data, the percentage of elements leached into the infusions as well as the daily eleme...
Source: Biological Trace Element Research - September 15, 2016 Category: Biology Authors: Brzezicha-Cirocka J, Grembecka M, Ciesielski T, Flaten TP, Szefer P Tags: Biol Trace Elem Res Source Type: research
Green Tea Consumption and the Risk of Incident Dementia in Elderly Japanese: The Ohsaki Cohort 2006 Study.
CONCLUSION: Green tea consumption is significantly associated with a lower risk of incident dementia.
PMID: 27594507 [PubMed - as supplied by publisher] (Source: The American Journal of Geriatric Psychiatry)
Source: The American Journal of Geriatric Psychiatry - September 8, 2016 Category: Psychiatry Tags: Am J Geriatr Psychiatry Source Type: research
Mechanism of Fenpropathrin Resistance in Red Spider Mite, Oligonychus coffeae (Acarina: Tetranychidae), Infesting Tea [Camellia sinensis L. (O. Kuntze)].
Abstract
Red spider mite (RSM), Oligonychus coffeae (Nietner) (Acarina: Tetranychidae), has gained special attention in view of their widespread occurrence as a pest on tea [Camellia sinensis L. (O. Kuntze)]. The development of acaricide (fenpropathrin) resistance has been screened in field populations (FPs) of RSMs from different tea-growing regions of south India and compared with a laboratory-susceptible population (SP) based on toxicity bioassay, detoxifying enzyme activities, analysis of acetylcholine esterase gene (AChE, 2064 bp), and their expression pattern using semiquantitative RT-PCR. The incre...
Source: Applied Biochemistry and Biotechnology - September 6, 2016 Category: Biochemistry Authors: Amsalingam R, Gajjeraman P, Sam N, Rahman VJ, Azariah B Tags: Appl Biochem Biotechnol Source Type: research
Preparation of Orally Disintegrating Tablets Containing Powdered Tea Leaves with Enriched Levels of Bioactive Compounds by Means of Microwave Irradiation Technique.
Abstract
In the present study, a microwave treatment process has been applied to prepare orally disintegrating tablets (ODTs) containing powdered tea leaves with enriched levels of the anti-inflammatory compounds such as chafuroside A (CFA) and chafuroside B (CFB). The use of distilled water as the adsorbed and granulation solvents in this preparation process afforded tablets with a long disintegration time (more than 120 s). The CFA and CFB contents of these tablets did not also change after 4 min of microwave irradiation due to the tablet temperature, which only increased to 100°C. In contrast, the ...
Source: Chemical and Pharmaceutical Bulletin - September 3, 2016 Category: Drugs & Pharmacology Authors: Tanaka H, Iwao Y, Izumikawa M, Sano S, Ishida H, Noguchi S, Itai S Tags: Chem Pharm Bull (Tokyo) Source Type: research
Distribution of phenolic content and screening for antioxidant capacity of different parts of tea plant (Camellia sinensis L.)
Tea is a medicinal beverage manufactured from the plant, Camellia sinensisL. The bud and two adjacent leaves (tea flush) are generally harvested in this process. Currently, it is also used as an ingredient in cosmetic products. The present study was carried out to screen the antioxidant activity and the distribution of phenolic content in different parts of the tea plant for their utilizatio... (Source: Journal of Medicinal Plants Research)
Source: Journal of Medicinal Plants Research - September 2, 2016 Category: Complementary Medicine Source Type: research
Soil fluoride fractions and their bioavailability to tea plants ( Camellia sinensis L.)
AbstractDrinking teas containing high fluoride (F) imposes fluorosis risk. The soil F bioavailability is an important factor influencing its uptake and contents in teas. The present work was conducted to investigate F fractions in soil and their bioavailability to tea plants. Tea seedlings were cultivated on 6 typical soils treated with a mixture consisting of dolomite, lime, peat and KCl at variable rates in the pot experiment. Soils and young shoots were collected in pairs from 63 sites of 21 plantations in a field experiment. Soil fluoride was sequentially separated into hot water soluble\([{\text{F}}_{{ ( {\text{h, H}}...
Source: Environmental Geochemistry and Health - September 2, 2016 Category: Environmental Health Source Type: research
Nasal carriage of methicillin-resistant Staphylococcus aureus and the effect of tea extracts on isolates
Conclusion: Among all tested individuals, HCWs had the highest percentage of MRSA nasal carriage. Green tea had a significantly stronger inhibitory effect than black tea on almost all tested isolates. (Source: The Journal Of The Egyptian Public Health Association)
Source: The Journal Of The Egyptian Public Health Association - September 1, 2016 Category: Global & Universal Tags: Original articles Source Type: research
Controllable synthesis of metallo-alkoxide precursor-derived nickel aluminate spinels using TEA-gel process and morphology-dependent reducibility
Publication date: 1 October 2016 Source:Materials Chemistry and Physics, Volume 182 Author(s): Nattamon Koonsaeng, Apirat Laobuthee, Panitat Hasin A study was made of the different preparation methods affecting the morphology and reducibility of the obtained NiAl2O4 spinels. The NiAl2O4 with various morphologies has been fabricated through the dependent control of TEA (triethanolamine) -gel parameters. Compared to the NiAl2O4 prepared from a direct calcination of spinel precursors, the superb structural characteristics of the NiAl2O4 including large surface area and well-defined interconnected nanoparticles were obser...
Source: Materials Chemistry and Physics - August 31, 2016 Category: Materials Science Source Type: research
Distribution of tannin-'tolerant yeasts isolated from Miang, a traditional fermented tea leaf (Camellia sinensis var. assamica) in northern Thailand.
Abstract
Miang is a fermented food product prepared from the tea leaves of Camellia sinensis var. assamica, and is traditionally produced in mountainous areas of northern Thailand. Although Miang has a long history and reveals deep-rooted cultural involvement with local people in northern Thailand, little is known regarding its microbial diversity. Yeasts were isolated from 47 Miang samples collected from 28 sampling sites, including eight provinces in upper northern Thailand. A hundred and seven yeast isolates were recovered and identified within 14 species based on the comparison of the D1/D2 sequence of...
Source: International Journal of Food Microbiology - August 31, 2016 Category: Food Science Authors: Kanpiengjai A, Chui-Chai N, Chaikaew S, Khanongnuch C Tags: Int J Food Microbiol Source Type: research
Evaluation of the Effect of Different Herbal Tea on Discoloration of Different Kinds of Composite
Conclusion: All tested restorative materials showed a color shift after immersion in herbal teas, which Tetric N ceram displayed the highest color change in Hibiscus tea and Borago tea induced lowest discoloration on Grandio after 24 h immersion. Thyme tea induced the highest level of discoloration on Gradia Direct and least discoloration was found in Borago tea on Grandio after 48 hours immersion. (Source: Journal of Dental Materials and Techniques)
Source: Journal of Dental Materials and Techniques - August 31, 2016 Category: Dentistry Source Type: research
Simultaneous determination of eight catechins and four theaflavins in green, black and oolong tea using new HPLC –MS–MS method
Publication date: 30 November 2016 Source:Journal of Pharmaceutical and Biomedical Analysis, Volume 131 Author(s): Wuqun Tao, Zhiguang Zhou, Bin Zhao, Tongyu Wei A simple, rapid and accurate analytical method was developed for the analysis of eight tea catechins and four theaflavins simultaneously in three types of tea (green, black and oolong tea), using ultra high performance liquid chromatography coupled with triple-quadrupole tandem mass spectrometry (HPLC–MS–MS) in multiple-reaction monitoring (MRM) mode. This method using HPLC–MS–MS in positive mode was performed on a CAPCELL PAK C18 MGIII (2.0mm×100mm...
Source: Journal of Pharmaceutical and Biomedical Analysis - August 30, 2016 Category: Drugs & Pharmacology Source Type: research
Effect of Green Tea Extract as Antioxidant on Shear Bond Strength of Resin Composite to in-Office and Home-Bleached Enamel
Conclusions:Application of antioxidant did not increase the shear bond strength of home-bleached enamel to resin composite but its application increased the shearbond strength of in-office bleached enamel to resin composite.Key words:Antioxidant, Green Tea, Shear Bond Strength, Tooth Bleaching, Composite Restoration (Source: Journal of Dental Biomaterials)
Source: Journal of Dental Biomaterials - August 30, 2016 Category: Dentistry Source Type: research
Protective effect of green tea extract against proline-induced oxidative damage in the rat kidney.
Abstract
We investigated, in vivo (acute and chronic), the effects of proline on thiobarbituric acid-reactive substances (TBA-RS) and on the activities of antioxidant enzymes such as catalase (CAT), glutathione peroxidase (GSH-Px) and superoxide dismutase (SOD) in renal tissues (cortex and medulla) of rats. For acute administration, 29-day-old rats received a single subcutaneous injection of proline (18.2μmol/g body weight) or an equivalent volume of 0.9% saline solution and were sacrificed 1h later. For chronic treatment, proline was injected subcutaneously in the rats twice a day from the 6th to the 28t...
Source: Biomedicine and pharmacotherapy = Biomedecine and pharmacotherapie - August 29, 2016 Category: Drugs & Pharmacology Authors: Delwing-Dal Magro D, Roecker R, Junges GM, Rodrigues AF, Delwing-de Lima D, da Cruz JG, Wyse AT, Pitz HS, Zeni AL Tags: Biomed Pharmacother Source Type: research
Effect of gamma radiation on antioxidant capacity of green tea, yerba mate, and chamomile tea as evaluated by different methods
In conclusion, gamma irradiation reduced the capacity of some antioxidants but preserved the capacity of others. This study showed that one isolated test does not suffice to perform this evaluation reliably, which is a reflection of the diversity and complexity of the effects of irradiation on antioxidant molecules present in different samples. (Source: Radiation Physics and Chemistry)
Source: Radiation Physics and Chemistry - August 27, 2016 Category: Physics Source Type: research
Daily consumption of tea catechins improves aerobic capacity in healthy male adults: a randomized double-blind, placebo-controlled, crossover trial.
This study aimed to demonstrate the effect of daily tea catechin consumption on aerobic capacity in humans. Sixteen Japanese non-athlete male subjects (aged 25-47 years) took 500 mL of a test beverage with or without tea catechins (570 mg) daily for 8 weeks and attended a training program twice a week. Aerobic capacity was evaluated by indirect calorimetry and near-infrared spectroscopy during graded cycle exercise. Catechin beverage consumption was associated with a significantly higher ventilation threshold during exercise and a higher recovery rate of oxygenated hemoglobin and myoglobin levels after graded cycle exe...
Source: Bioscience, Biotechnology, and Biochemistry - August 25, 2016 Category: Biochemistry Authors: Ota N, Soga S, Shimotoyodome A Tags: Biosci Biotechnol Biochem Source Type: research
