Publications
| Title | Abstract | Year(sorted descending) Filter | PMID Filter |
|---|
| black tea aroma inhibited increase of salivary chromogranin-a after arithmetic tasks. | growing attention has been paid to the effects of food flavor components on alleviating negative brain functions caused by stressful lifestyles. in this study, we investigated the alleviating effect of two kinds of black tea aromas on physical and psychological stress induced by the uchida-kraepelin test, based on salivary chromogranin-a (cga) levels as a stress marker and subjective evaluations (profile of mood states). | 2018 | 29361988 |
| the modulatory effect of polyphenols from green tea, oolong tea and black tea on human intestinal microbiota in vitro. | in the present study, polyphenols from green tea (gtp), oolong tea (otp) and black tea (btp) were prepared by extraction with hot water and polyamide column chromatography. in antioxidant assay in vitro, each tea polyphenols exhibited potential activity; the intestinal absorption of gtp, otp and btp was investigated individually by caco-2 transwell system, and each sample was poorly transported, illustrating a low transport rate for tea polyphenols through cell monolayers. the effects of gtp, ot ... | 2018 | 29358833 |
| a blend of extracts from houttuynia cordata, nelumbo nucifera, and camellia sinensis protects against ethanol-induced liver damage in c57bl/6 mice. | the protective activity of a mixture of aqueous and ethanolic extracts from houttuynia cordata thunb, nelumbo nucifera g. leaves, and camellia sinensis seed (hnc) was evaluated in c57bl/6 mice. pretreatment with hnc prevented the elevation of serum aspartate aminotransferase and alanine aminotransferase caused by ethanol-induced hepatic damage. the hnc-treated mice showed significantly lower triglyceride levels, reduced cyp2e1 activity, and increased antioxidant enzyme activities and lipogenic m ... | 2018 | 29356593 |
| a metabolomics study reveals enhanced inhibition and metabolic dysregulation in e. coli induced by lactobacillus acidophilus fermented black tea extract. | this study examined the ability of lactobacillus acidophilus (la) to ferment black tea extract (bte), and the enhancement of escherichia coli cellular uptake of phenolic compounds when this bacteria was incubated with fermented bte. the inhibitory effects of bte to e. coli bacteria, with and w/o fermentation, were compared. several intracellular phenolic compounds, as well as metabolic profiles of e. coli with and w/o treatments, were also determined using a hplc-ms/ms-based approach. our result ... | 2018 | 29345909 |
| exogenous melatonin alleviates cold stress by promoting antioxidant defense and redox homeostasis in camellia sinensis l. | the unprecedented early spring frost that appears as a cold stress adversely affects growth and productivity in tea (camellia sinensis l.); therefore, it is indispensable to develop approaches to improve the cold tolerance of tea. here, we investigated the effect of pretreatment with exogenous melatonin on the net photosynthetic rate, the maximum photochemical efficiency of psii, chlorophyll content, lipid peroxidation, reactive oxygen species (ros) accumulation, antioxidant potential, and redox ... | 2018 | 29342935 |
| theaflavin-3,3'-digallate enhances the inhibitory effect of cisplatin by regulating the copper transporter 1 and glutathione in human ovarian cancer cells. | ovarian cancer has the highest fatality rate among the gynecologic cancers. the side effects, high relapse rate, and drug resistance lead to low long-term survival rate (less than 40%) of patients with advanced ovarian cancer. theaflavin-3,3'-digallate (tf3), a black tea polyphenol, showed less cytotoxicity to normal ovarian cells than ovarian cancer cells. we aimed to investigate whether tf3 could potentiate the inhibitory effect of cisplatin against human ovarian cancer cell lines. in the pres ... | 2018 | 29301278 |
| naphthoquinone metabolites produced by monacrosporium ambrosium, the ectosymbiotic fungus of tea shot-hole borer, euwallacea fornicatus, in stems of tea, camellia sinensis. | the tea shot-hole borer beetle (tshb, euwallacea fornicatus) causes serious damage in plantations of tea, camellia sinensis var. assamica, in sri lanka and south india. tshb is found in symbiotic association with the ambrosia fungus, monacrosporium ambrosium (syn. fusarium ambrosium), in galleries located within stems of tea bushes. m. ambrosium is known to be the sole food source of tshb. six naphthoquinones produced during spore germination in a laboratory culture broth of m. ambrosium were is ... | 2018 | 29292470 |
| an emerging strategy for evaluating the grades of keemun black tea by combinatory liquid chromatography-orbitrap mass spectrometry-based untargeted metabolomics and inhibition effects on α-glucosidase and α-amylase. | quantitative analysis and untargeted liquid chromatography mass spectrum (lc-ms) based metabolomics of different grades of keemun black tea (kbt) were conducted. quantitative analysis did not show tight correlation between tea grades and contents of polyphenols, but untargeted metabolomics analysis revealed that high-grades kbt were distinguished from the low-grades. s-plot and variable importance (vip) analysis gave 28 marker compounds responsible for the discrimination of different grades of k ... | 2018 | 29291881 |
| simplified recovery of enzymes and nutrients in sweet potato wastewater and preparing health black tea and theaflavins with scrap tea. | the industry discards generous organic wastewater in sweet potato starch factory and scrap tea in tea production. a simplified procedure to recover all biochemicals from the wastewater of sweet potato starch factory and use them to make health black tea and theaflavins from scrap green tea was developed. the sweet potato wastewater was sequentially treated by isoelectric precipitation, ultrafiltration and nanofiltration to recover polyphenol oxidase (ppo), β-amylase, and small molecular fraction ... | 2018 | 29287451 |
| antioxidative flavan-3-ol dimers from the leaves of camellia fangchengensis. | camellia fangchengensis liang et zhong, belonging to the genus camellia sect. thea (theaceae), is an endemic tea species to the south and southwest areas of guangxi province, people's republic of china. known as a wild tea plant, the leaves have been used for producing green tea or black tea by the local people of its growing area. hplc and lc-ms analysis showed the leaves contain oligomeric catechins as major phenolic components. further detailed phytochemical study led to the identification of ... | 2018 | 29232949 |
| molecular evidence for catechin synthesis and accumulation in tea buds (camellia sinensis). | early spring buds of the camellia sinensis variety shuchazao were separated into two parts, including the shoot tip (st) and non-expanded young leaves (yl), in which the synthesis and accumulation of catechins in the two parts were assessed by high-performance liquid chromatography (hplc), p-dimethylaminocinnamaldehyde (dmaca) staining, quantitative real-time polymerase chain reaction (qrt-pcr), and in situ hybridization. hplc showed that (-)-epigallocatechin-3-gallate (egcg) and (-)-epicatechin ... | 2018 | 29227650 |
| phytochemicals, anti-inflammatory, antiproliferative, and methylglyoxal trapping properties of zijuan tea. | zijuan tea (camellia sinensis var. assamica) is a unique anthocyanin-rich tea cultivar in china. although chemical component analysis of zijuan tea and extraction technology of anthocyanins was widely documented, its functional properties have not been extensively explored. in this study, the anti-inflammatory, antiproliferative, and methylglyoxal (mgo) trapping activities of water extract (zwe) and ethyl acetate extract (zee) of zijuan tea were investigated for the 1st time. results showed that ... | 2018 | 29337349 |
| epigallocatechin gallate from green tea exhibits potent anticancer effects in a-549 non-small lung cancer cells by inducing apoptosis, cell cycle arrest and inhibition of cell migration. | green tea (camellia sinensis) is considered as a rich source of epigallocatechin gallate (egcg) which has been shown to exert impressive pharmacological properties. the anticancer properties of egcg have been extensively studied however, its anticancer activity has not been explored in lung cancer. the present study was therefore designed to evaluate the anticancer effects of egcg against non-small cell lung cancer (nsclc) cell line a-549 and normal human fibroblast fr-2 cells. | 2018 | 29332333 |
| isolation and characterization of key genes that promote flavonoid accumulation in purple-leaf tea (camellia sinensis l.). | there were several high concentrations of flavonoid components in tea leaves that present health benefits. a novel purple-leaf tea variety, 'mooma1', was obtained from the natural hybrid population of longjing 43 variety. the buds and young leaves of 'mooma1' were displayed in bright red. hplc and lc-ms analysis showed that anthocyanins and o-glycosylated flavonols were remarkably accumulated in the leaves of 'mooma1', while the total amount of catechins in purple-leaf leaves was slightly decrea ... | 2018 | 29317677 |
| radiocesium uptake through leaf surfaces of tea plants (camellia sinensis l.). | to clarify the source of radiocesium detected in newly emerged tea leaves contaminated just before the time of bud opening by fallout of radionuclides from fukushima dai-ichi nuclear power plant, 137cscl solution (0.185 m bq ml-1) was applied to the front or the backside surfaces of mature leaves of tea plant (camellia sinensis l. cv. yabukita) at the time of bud opening. a 21 days after foliar application, the buds had grown and developed to the three- or four-leaf stage. in the front treatment ... | 2018 | 29197749 |
| antibacterial activity of polyphenolic fraction of kombucha against vibrio cholerae: targeting cell membrane. | the present study was undertaken to determine the mechanism of antibacterial activity of a polyphenolic fraction, composed of mainly catechin and isorhamnetin, previously isolated from kombucha, a 14-day fermented beverage of sugared black tea, against the enteropathogen vibrio cholerae n16961. bacterial growth was found to be seriously impaired by the polyphenolic fraction in a dose-dependent manner. scanning electron microscopy demonstrated morphological alterations in bacterial cells when exp ... | 2018 | 29193174 |
| correlation of lithium bioaccessibility from tea (camellia sinensis l.) with tea type and consumption habits. | in this study, the total contents, leachability into tea infusions, and bioaccessibility of lithium from black, earl grey, and green teas were evaluated by inductively coupled plasma mass spectrometry. leachabilities were evaluated after infusion for 2, 5, or 10min. bioaccessibility was determined in vitro under simulated stomach and intestinal digestion conditions. addition of lemon juice, sugar, or milk for consumption, and calcium, tannic acid, and citric acid as additives were evaluated to d ... | 2018 | 29120795 |
| antioxidant capacity and major polyphenol composition of teas as affected by geographical location, plantation elevation and leaf grade. | tea polyphenols have been a topic of discussion due to their health benefits. nevertheless, detailed studies on the antioxidant capacity and polyphenol contents of teas in relation to factors including geographical locations, plantation elevations and leaf grades have been limited. in this study, 53 tea samples were analysed to determine the individual and total catechin and theaflavin contents by hplc and the total antioxidant capacity by oxygen radical absorbance capacity (orac) methods. resul ... | 2018 | 29120758 |
| cooking and co-ingested polyphenols reduce in vitro methylmercury bioaccessibility from fish and may alter exposure in humans. | fish consumption is a major pathway for mercury exposure in humans. current guidelines and risk assessments assume that 100% of methylmercury (mehg) in fish is absorbed by the human body after ingestion. however, a growing body of literature suggests that this absorption rate may be overestimated. we used an in vitro digestion method to measure mehg bioaccessibility in commercially-purchased fish, and investigated the effects of dietary practices on mehg bioaccessibility. cooking had the greates ... | 2018 | 29096961 |
| modulatory effects of green tea extract against the hepatotoxic effects of 4-nonylphenol in catfish (clarias gariepinus). | the antioxidant role of the green tea (camellia sinensis) extract (gte) was examined to remedy the toxic effects of (0.2mgl-1) 4-nonylphenol(4-np). biochemical parameters, antioxidant enzymes, liver lipid peroxidation (lpo), dna fragmentation, and apoptosis as well as histopathology of liver of african catfish clarias gariepinus were considered. catfishes were divided into four groups: first group (control), second group (0.2mgl-1 of 4-np), third group (0.2mgl-1of 4-np +100mg gte l-1water), and ... | 2018 | 29156308 |
| the contribution of cell wall composition in the expansion of camellia sinensis seedlings roots in response to aluminum. | treatment with aluminum triggers a unique response in tea seedlings resulting in biochemical modification of the cell wall, regulation of the activity of the loosening agents, and elongation of root. unlike most terrestrial plants, tea (camellia sinensis l.) responds to aluminum (al) through the promotion of its root elongation; but the real mechanism(s) behind this phenomenon is not well understood. a plausible relationship between the modifications of the cell wall and the promotion of root el ... | 2018 | 29022073 |
| accumulating pathways of γ-aminobutyric acid during anaerobic and aerobic sequential incubations in fresh tea leaves. | the roles of the γ-aminobutyric acid (gaba) shunt and polyamine (pa) degradation pathway on gaba accumulation were investigated in fresh tea leaves under anaerobic and aerobic sequential incubations. the gaba accumulation was mainly completed in the first anaerobic incubation through the interaction of the gaba shunt with the pa degradation pathway. when treated with aminoguanidine, the diamine oxidase and polyamine oxidase activities were almost completely inhibited, and the gaba contents decre ... | 2018 | 28946226 |
| transfer of ochratoxin a from raw black tea to tea infusions prepared according to the turkish tradition. | ochratoxin a (ota) is a natural contaminant of food including tea with multiple toxic effects, which poses a threat to human health. in terms of lifestyle, the turkish population is a frequent visitor of tearooms, and the traditional turkish tea preparation is one of the most popular ways of preparing tea infusion. | 2018 | 28580652 |
| molecular understanding of epigallocatechin gallate (egcg) in cardiovascular and metabolic diseases. | the compound epigallocatechin-3-gallate (egcg), the major polyphenolic compound present in green tea [camellia sinensis (theaceae], has shown numerous cardiovascular health promoting activity through modulating various pathways. however, molecular understanding of the cardiovascular protective role of egcg has not been reported. | 2018 | 28864169 |
| the enhanced inhibition of water extract of black tea under baking treatment on α-amylase and α-glucosidase. | this paper studied the inhibition of water extract of natural or baked black tea on the activity of α-amylase and α- glucosidase. baking treatment was found to be one effective way to enhance the inhibition of black tea on both α-amylase and α- glucosidase, and ic50 of water extract of baked black tea (bbtwe) were 1.213mg/ml and 4.190mg/ml, respectively, while ic50 of water extract of black tea (btwe) were 1.723mg/ml and 6.056mg/ml, respectively. this study further studied the mechanism of the e ... | 2018 | 28863898 |
| metabolomic analysis reveals the composition differences in 13 chinese tea cultivars of different manufacturing suitabilities. | green tea and black tea are manufactured using appropriate tea cultivars in china. however, the metabolite differences relating to the manufacturing suitability of tea cultivars are unclear. in the present study, we performed a non-targeted metabolomic analysis on 13 chinese tea cultivars using ultra-high performance liquid chromatography coupled with quadrupole-time-of-flight mass spectrometry to investigate comprehensively the metabolite differences between cultivars suitable for manufacturing ... | 2018 | 28734044 |
| effect of amount and duration of waste green tea powder on the growth performance, carcass characteristics, blood parameters, and lipid metabolites of growing broilers. | this study has evaluated the possible effect of waste powder of green tea (camellia sinensis) in feed supplementation on the growth performance, carcass characteristics, blood parameters, and lipid metabolites of growing broilers (chicks) in both the amount and duration aspects of dietary additives during the finisher phases. in the experiment, growth performance, carcass characteristics, blood parameters, and lipid metabolites of broiler chicks have been fully recorded and explored. the diet of ... | 2018 | 29039040 |
| implementation of cslis/nes in linalool biosynthesis involves transcript splicing regulation in camellia sinensis. | volatile terpenoids produced in tea plants (camellia sinensis) are airborne signals interacting against other ecosystem members, but also pleasant odorants of tea products. transcription regulation (including transcript processing) is pivotal for plant volatile terpenoid production. in this study, a terpene synthase gene cslis/nes was recovered from tea plants (c. sinensis cv. "long-men xiang"). cslis/nes transcription regulation resulted in 2 splicing forms: cslis/nes-1 and cslis/nes-2 lacking ... | 2018 | 28963730 |
| evolutionary and functional characterization of leucoanthocyanidin reductases from camellia sinensis. | lars promoted the biosynthesis of catechin monomers and inhibited their polymerization. the accumulation of catechin monomers and polymers was increased by up-regulating the expression of ntlar and ntanr s in csmyb5b transgenic tobacco. tea is rich in polyphenolic compounds, and catechins are the major polyphenols in tea. the biosynthesis of polyphenols is closely related to the expression of the leucoanthocyanidin reductase (lar) and anthocyanidin reductase (anr) genes. in this paper, an evolut ... | 2018 | 28887677 |
| identification of epigallocatechin-3-o-(3-o-methyl)-gallate (egcg3''me) and amino acid profiles in various tea (camellia sinensis l.) cultivars. | this article includes experimental data on the identification of epigallocatechin-3-o-(3-o-methyl)-gallate (egcg3''me) by 2-dimensional (2d) proton (1h) nmr analysis and on the information of amino acid and catechin compound profiles by hplc analysis in leaf extracts of various tea cultivars. these data are related to the research article "metabolic phenotyping of various tea (camellia sinensis l.) cultivars and understanding of their intrinsic metabolism" (ji et al., 2017) [1]. the assignment f ... | 2017 | 28879218 |
| green tea supplementation produces better neuroprotective effects than red and black tea in alzheimer-like rat model. | green tea from camellia sinensis plays a neuroprotective role in different neurodegenerative conditions, such as memory deficits in alzheimer disease (ad). however, whether other teas from camellia sinensis present similar neuroprotective effect still is not clear. here we investigate effects of green, red and black tea supplementation on memory and hippocampus oxidative status in a rat model of alzheimer-like disease (ad-like). | 2017 | 28873707 |
| inhibitory effect of the ethanol extract of a rice bran mixture comprising angelica gigas, cnidium officinale, artemisia princeps, and camellia sinensis on brucella abortus uptake by professional and nonprofessional phagocytes. | in this study, we evaluated the inhibitory effect of a rice bran mixture extract (rbe) on brucella abortus pathogenesis in professional (raw 264.7) and nonprofessional (hela) phagocytes. we fermented the rice bran mixture and then extracted it with 50% ethanol followed by gas chromatography-mass spectrometry to identify the components in rbe. our results clearly showed that rbe caused a significant reduction in the adherence of b. abortus in both cell lines. furthermore, analysis of phagocytic s ... | 2017 | 28870011 |
| copper, manganese, zinc, and cadmium in tea leaves of different types and origin. | concentrations of selected metals (cu, mn, zn, cd) in tea leaves were investigated. samples included black, green, and other (red, white, yellow, and oolong) teas. they were purchased on a local market but they covered different countries of origin. beverages like yerba mate, rooibos, and fruit teas were also included in the discussion. metal determinations were performed using atomic absorption spectrometry. in black teas, mn/cd ratio was found to be significantly higher (48,091 ± 35,436) vs. g ... | 2017 | 28866820 |
| fluoride concentrations in traditional and herbal teas: health risk assessment. | traditional tea (camellia sinensis) and herbal tea are being consumed across the world. however, long term consumption of tea can increase the chances of fluorosis owing to the presence of fluoride (f) in teas. therefore, it is imperative to assess the health risk associated with tea consumption. the main objectives of this study were to: 1) estimate total f in 47 popular teas, including traditional and herbal teas and f concentrations in 1% (w/v) infusion of 5 min, and 2) assess the exposure ri ... | 2017 | 28865383 |
| lipidomics analysis unravels the effect of nitrogen fertilization on lipid metabolism in tea plant (camellia sinensis l.). | nitrogen (n) plays an important role in the formation of tea quality-related compounds, like amino acids and flavor/aroma origin compounds. lipids, which have been reported to be affected by n deficiency, are precursors to the generation of flavor/aroma origin compounds in tea plant. however, there is no literature about the lipid profiles of tea plant affected by n fertilization. hence, we hypothesize that the biosynthesis of flavor-related compounds in tea was affected by n through its regulat ... | 2017 | 29037151 |
| green tea protects against memory deficits related to maternal deprivation. | maternal deprivation (md) in early life affects the development of the brain, causing cognitive losses in adulthood. oxidative imbalance may be one of the factors that trigger these deficits. therapies with antioxidant components, like green tea from camellia sinensis (gt) has been used to treat or prevent memory deficits in a variety of conditions related to oxidative stress. here we demonstrate that memory deficits caused by md can be prevented by gt antioxidant activity in hippocampus. pregna ... | 2017 | 29031548 |
| molecular link between leaf coloration and gene expression of flavonoid and carotenoid biosynthesis in camellia sinensis cultivar 'huangjinya'. | 'huangjinya' is an excellent albino tea germplasm cultivated in china because of its bright color and high amino acid content. it is light sensitive, with yellow leaves under intense light while green leaves under weak light. as well, the flavonoid and carotenoid levels increased after moderate shading treatment. however, the mechanism underlying this interesting phenomenon remains unclear. in this study, the transcriptome of 'huangjinya' plants exposed to sunlight and shade were analyzed by hig ... | 2017 | 28596773 |
| bioavailability of black tea theaflavins: absorption, metabolism, and colonic catabolism. | data obtained with in vitro fecal incubations and a feeding study indicate black tea theaflavin and its galloyl derivatives are not absorbed in detectable amounts in either the upper or lower gastrointestinal tract. the theaflavin skeleton is comparatively resistant to degradation by colonic bacteria with a 67% recovery being obtained after a 24 h incubation, which yielded 21 phenolic and aromatic catabolites. the theaflavin galloyl moiety was removed by the microbiota, and the released gallic a ... | 2017 | 28595385 |
| camellia sinensis prevents perinatal nicotine-induced neurobehavioral alterations, tissue injury, and oxidative stress in male and female mice newborns. | nicotine exposure during pregnancy induces oxidative stress and leads to behavioral alterations in early childhood and young adulthood. the current study aimed to investigate the possible protective effects of green tea (camellia sinensis) against perinatal nicotine-induced behavioral alterations and oxidative stress in mice newborns. pregnant mice received 50 mg/kg c. sinensis on gestational day 1 (pd1) to postnatal day 15 (d15) and were subcutaneously injected with 0.25 mg/kg nicotine from pd1 ... | 2017 | 28588748 |
| protective effects of green tea on olanzapine-induced-metabolic syndrome in rats. | atypical antipsychotics particularly olanzapine are associated with obesity and serious metabolic disturbances. as green tea (camellia sinensis) is generally associated with beneficial effects on obesity and other metabolic disturbances, this study was undertaken to evaluate the effect of green tea aqueous extract (gtae) on olanzapine induced weight gain and metabolic abnormalities in rats. male wistar rats were divided into eight groups: control, olanzapine (5mg/kg/day, ip.), gtae (25, 50 and 1 ... | 2017 | 28586744 |
| a randomized, double-blind, placebo-controlled clinical trial examining the effects of green tea extract on systemic lupus erythematosus disease activity and quality of life. | antiinflammatory and immunomodulatory benefit of green tea (camellia sinensis) in autoimmune disease has been proven in recent studies. the objective of this study was to assess the effects of green tea on disease activity and quality of life in systemic lupus erythematosus patients. a randomized controlled trial on subjects with lupus was conducted, and 68 patients in the age range of 39.1 ± 10.3 years and body mass index of 25.7 ± 5.21 kg/m2 completed the 12-week study. patients were randomly ... | 2017 | 28585735 |
| the synergistic potential of various teas, herbs and therapeutic drugs in health improvement: a review. | tea is one of the most widely consumed non-alcoholic beverages in the world next to water. it is classified as camellia sinensis and non-camellia sinensis (herbal teas). the common bioactive compounds found mainly in green teas are flavan-3-ols (catechins) (also called flavanols), proanthocyanidins (tannins) and flavonols. black tea contains theaflavins and thearubigins and white tea contains l-theanine and gamma-aminobutyric acid (gaba), while herbal teas contain diverse polyphenols. phytochemi ... | 2017 | 28585285 |
| a case of green tea (camellia sinensis) imbibement causing possible anaphylaxis. | 2017 | 28583266 | |
| phytochemical-rich foods inhibit the growth of pathogenic trichomonads. | plants produce secondary metabolites that often possess widespread bioactivity, and are then known as phytochemicals. we previously determined that several phytochemical-rich food-derived preparations were active against pathogenic foodborne bacteria. trichomonads produce disease (trichomoniasis) in humans and in certain animals. trichomonads are increasingly becoming resistant to conventional modes of treatment. it is of interest to test bioactive, natural compounds for efficacy against these p ... | 2017 | 28903731 |
| green tea effects on cognition, mood and human brain function: a systematic review. | green tea (camellia sinensis) is a beverage consumed for thousands of years. numerous claims about the benefits of its consumption were stated and investigated. as green tea is experiencing a surge in popularity in western culture and as millions of people all over the world drink it every day, it is relevant to understand its effects on the human brain. | 2017 | 28899506 |
| study of nutritional value of dried tea leaves and infusions of black, green and white teas from chinese plantations | the processing of tea leaves determines the contents of bioactive ingredients, hence it should be expected that each variety of tea, black, red or green, will represent a different package of compounds of physiological importance. taste and aroma, as well as price and brand are the main factors impacting consumers’ preferences with regard to tea of their choice; on the other hand consumers less frequently pay attention to the chemical composition and nutritional value of tea. | 2017 | 28895389 |
| trends in fluid consumption and beverage choices among adults reveal preferences for ayran and black tea in central turkey. | beverages are globally significant sources of water in the diet. there is a lack of knowledge about fluid intake from beverage and water consumption in turkey. thus, the aim of this study was to examine the type of drinks preferred at meals and snacks as well as the daily fluid, beverage and water intakes based on age and gender. | 2017 | 28731553 |
| colorectal cancer and inflammatory bowel diseases: effects of diet and antioxidants. | it is well established that oxidative stress is common in inflammatory bowel diseases (ibds). accordingly, antioxidants are recommended for treatment. the aim of this study is to compare the effects of antioxidants contained in the various types of tea on symptoms and evolution of ibd and colorectal cancer (crc). analysis of the literature revealed that the theaflavin-3, 30-digallate (tfdg) contained in black tea, and epigallocatechin-3-o-gallate (egcg) contained in green tea have protective eff ... | 2017 | 28726358 |
| cellular antioxidant, methylglyoxal trapping, and anti-inflammatory activities of cocoa tea (camellia ptilophylla chang). | cocoa tea (camellia ptilophylla chang) is a naturally low caffeine-containing but gallocatechin gallate (gcg)-rich tea cultivar, though its biological activities have not been extensively explored. herein, we evaluated the in vitro cellular antioxidant, methylglyoxal trapping, and anti-inflammatory activities of water extract of green tea from cocoa tea (cwe) and yunnan daye tea (camellia sinensis) (ywe), and their predominant bioactive components gcg and epigallocatechin gallate (egcg) for comp ... | 2017 | 28725904 |
| identification of a flavonoid glucosyltransferase involved in 7-oh site glycosylation in tea plants (camellia sinensis). | flavonol glycosides, which are often converted from aglycones in a process catalyzed by udp-glycosyltransferases (ugts), play an important role for the health of plants and animals. in the present study, a gene encoding a flavonoid 7-o-glycosyltransferase (csugt75l12) was identified in tea plants. recombinant csugt75l12 protein displayed glycosyltransferase activity on the 7-oh position of multiple phenolic compounds. in relative comparison to wild-type seeds, the levels of flavonol-glucosides i ... | 2017 | 28725058 |
| black tea source, production, and consumption: assessment of health risks of fluoride intake in new zealand. | in countries with fluoridation of public water, it is imperative to determine other dietary sources of fluoride intake to reduce the public health risk of chronic exposure. new zealand has one of the highest per capita consumption rates of black tea internationally and is one of the few countries to artificially fluoridate public water; yet no information is available to consumers on the fluoride levels in tea products. in this study, we determined the contribution of black tea as a source of di ... | 2017 | 28713433 |
| six phenylalanine ammonia-lyases from camellia sinensis: evolution, expression, and kinetics. | phenylalanine ammonia-lyase (pal), the branch point enzyme controlling the flow of primary metabolism into second metabolism, converts the l-phenylalanine (l-phe) to yield cinnamic acid. based on the sequencing data available from eight transcriptome projects, six pal genes have been screened out, cloned, and designated as cspala-cspalf. the phylogenetic tree showed that cspals were divided into three subgroups, pala and palb, palc and pald, and pale and palf. all six cspals exhibited indiscrimi ... | 2017 | 28711790 |
| catechin composition and antioxidant activity of black teas in relation to brewing time. | black tea infusions are one of the most popular beverages across the world. their extract composition depends on several factors, brewing time being one of the most important determinants. the aim of the present study was to determine the catechin composition of different black tea infusions using a validated lc electrospray ionization time-of-flight ms method. additionally, total phenolic content (tpc) and antioxidant activity of infusions were evaluated using folin-ciocalteu reagent and stable ... | 2017 | 28707612 |
| extrapolative microrna precursor based ssr mining from tea est database in respect to agronomic traits. | tea (camellia sinensis, (l.) kuntze) is considered as most popular drink across the world and it is widely consumed beverage for its several health-benefit characteristics. these positive traits primarily rely on its regulatory networks of different metabolic pathways. development of microsatellite markers from the conserved genomic regions are being worthwhile for reviewing the genetic diversity of closely related species or self-pollinated species. although several ssr markers have been report ... | 2017 | 28683768 |
| oolong tea: a critical review of processing methods, chemical composition, health effects, and risk. | oolong tea (ot) is a traditional chinese tea (camellia sinensis) and is especially popular in south china. this review is to comprehensively summarize the miscellaneous research that has been done towards to the processing, phytochemistry, health benefit, and risk of ot. these literatures were carried out not only from different electronic databases but also from text books written in english, japanese, and chinese, including those traditional records tracing back to the tang dynasty (a.d. 618-9 ... | 2017 | 28678527 |
| pyramiding of tea dihydroflavonol reductase and anthocyanidin reductase increases flavan-3-ols and improves protective ability under stress conditions in tobacco. | tea (camellia sinensis) is one of the richest sources of flavan-3-ols, an important class of flavonoids. the expression level of gene-encoded key regulatory enzymes of flavan-3-ol/anthocyanin biosynthetic pathway, dihydroflavonol 4-reductase (dfr) and anthocyanidin reductase (anr), has been highly correlated with the flavan-3-ol contents and antioxidant activity in tea plant. in the present study, pyramiding of csdfr and csanr in tobacco was achieved. however, single transgenic tobacco overexpre ... | 2017 | 28664364 |
| healthy dietary patterns decrease the risk of colorectal cancer in the mecca region, saudi arabia: a case-control study. | colorectal cancer (crc) is the first most common cancer in males and the third most common cancer in females in saudi arabia. dietary habits are strongly associated with the inhibition or proliferation of malignancy. therefore, this study is aiming to investigate the risks and protective benefits of dietary factors affecting crc in the mecca region of saudi arabia. | 2017 | 28662634 |
| functional characterization of tea (camellia sinensis) myb4a transcription factor using an integrative approach. | green tea (camellia sinensis, cs) abundantly produces a diverse array of phenylpropanoid compounds benefiting human health. to date, the regulation of the phenylpropanoid biosynthesis in tea remains to be investigated. here, we report a cdna isolated from leaf tissues, which encodes a r2r3-myb transcription factor. amino acid sequence alignment and phylogenetic analysis indicate that it is a member of the myb4-subgroup and named as csmyb4a. transcriptional and metabolic analyses show that the ex ... | 2017 | 28659938 |
| neurochemical and behavioral effects of green tea (camellia sinensis) as observed in animals exposed to restraint stress. | clinical studies on psychiatric patients suggest that life events stress precipitates depression. the possible involvement of 5-hydroxy tryptamine (5-ht; serotonin) in depression and other behavioral deficits is also suggested by clinical studies. as a natural stimulant, green tea (camellia sinensis) diminishes stress, worry and anxiety, allowing the brain to focus and concentrate better. previously we have reported that beneficial effects of green tea might be associated with altered levels of ... | 2017 | 28649074 |
| effects of kaolin (m-99-099) application on antioxidant and phenolic compounds in tea leaves (camellia sinensis l.o. kuntze). | in this study, the effects of kaolin (m-99-099) applications on the total phenolic and antioxidant contents of tea leaves (camellia sinensis (l.) o. kuntze) harvested in three different periods were investigated. for this purpose, four different strategies including standard fertilizer application (t), 3% kaolin+standard fertilizer application (ka1), 6% kaolin+standard fertilizer application (ka2), and control (c) (nothing applied) were used to compare the effects of these strategies on total ph ... | 2017 | 28639055 |
| some engineering properties of shelled and kernel tea (camellia sinensis) seeds. | camellia sinensis is the source of tea leaves and it is an economic crop now grown around the world. tea seed oil has been used for cooking in china and other asian countries for more than a thousand years. tea is the most widely consumed beverages after water in the world. it is mainly produced in asia, central africa, and exported throughout the world. some engineering properties (size dimensions, sphericity, volume, bulk and true densities, friction coefficient, colour characteristics and mec ... | 2017 | 28638865 |
| consumers' acceptance of medicinal herbs: an application of the technology acceptance model (tam). | the shift in consumers' preferences from synthetic to 'natural' products has led to a resurgence of interest in medicinal plants, particularly in developing countries. however, research data about consumers' preferences for particular products is hard to find. | 2017 | 28625892 |
| effect of the type of brewing water on the chemical composition, sensory quality and antioxidant capacity of chinese teas. | the physicochemical characteristics, sensory quality, and antioxidant activity of tea infusions prepared with purified water (pw), mineral water (mw), mountain spring water (msw), and tap water (tw) from hangzhou were investigated. the results showed that the taste quality, catechin concentration, and antioxidant capacity of green, oolong, and black tea infusions prepared using mw and tw were significantly lower than those prepared using pw. extraction of catechins and caffeine was reduced with ... | 2017 | 28624083 |
| evaluation of the effects of three plant species (myrtus communis l., camellia sinensis l., zataria multiflora boiss.) on the healing process of intraoral ulcers in rats. | use of traditional medicine to relieve human sufferings has a very long history. the effects of these plants in wound curing and subsequently making the best mucosa patch for treatment of oral ulcers is still under investigation. | 2017 | 28620637 |
| α-copaene is an attractant, synergistic with quercivorol, for improved detection of euwallacea nr. fornicatus (coleoptera: curculionidae: scolytinae). | the tea shot-hole borer, euwallacea fornicatus eichhoff, is an ambrosia beetle endemic to asia and a pest of commercial tea, camellia sinensis (l.) kuntze. recently, a complex of species morphologically similar to e. fornicatus has been recognized, which includes new pests established in israel and the usa, both in california and florida. collectively termed e. nr. fornicatus, these cryptic species carry symbiotic fusarium spp. fungi, some of which cause dieback disease in susceptible hosts, whi ... | 2017 | 28609448 |
| hplc method for measurement of human salivary α-amylase inhibition by aqueous plant extracts. | control of hyperglycemia is an important treatment in metabolic disorders such as type ii diabetes and obesity. α-amylase, as the first enzyme of glucose release from dietary polysaccharides, is a potential target to identify new sources of novel anti-obesity and anti-diabetic drugs. in this work, different herbal extracts as α-amylase inhibitors were studied by measuring the rate of the cleavage of a maltooligomer substrate 2-chloro-4-nitrophenyl-β-d-maltoheptoside. measurement of chromophore c ... | 2017 | 28605974 |
| physiologically based pharmacokinetic modeling of tea catechin mixture in rats and humans. | although green tea (camellia sinensis) (gt) contains a large number of polyphenolic compounds with anti-oxidative and anti-proliferative activities, little is known of the pharmacokinetics and tissue dose of tea catechins (tcs) as a chemical mixture in humans. the objectives of this study were to develop and validate a physiologically based pharmacokinetic (pbpk) model of tea catechin mixture (tcm) in rats and humans, and to predict an integrated or total concentration of tcm in the plasma of hu ... | 2017 | 28603626 |
| antipyretic potential of herbal coded formulation (pyrexol). | the antipyretic effect of the aqueous extract of herbal coded formulation containing equal amount of salix alba, emblica officinalis, glycyrrhiza glabra, adhatoda vasica, viola odorata, thea sinensis, veleriana officinalis, foeniculum vulgare, sisymbrium irrio and achillea millefolium was investigated using the yeast induced pyrexia model in rabbits. paracetamol was used as a control group. rectal temperatures of all rabbits were recorded immediately before the administration of the extract or p ... | 2017 | 28603131 |
| important medicinal herbs in parkinson's disease pharmacotherapy. | parkinson's disease (pd) is the most common progressive neurodegenerative movement disorder affecting more than 10 million people worldwide. the characteristic hallmark of pd involves progressive loss of dopaminergic (da-ergic) neuron in substantia nigra pars compacta (snpc) region of the brain, however, aetiology of the disease still remains unclear. mitochondrial dysfunction and oxidative insult are considered to be the key culprit. the current therapy available for pd primarily relies on levo ... | 2017 | 28599249 |
| itraq-based proteomics monitors the withering dynamics in postharvest leaves of tea plant (camellia sinensis). | tea plant [camellia sinensis (l.) o. kuntze] is a typical leaf-type beverage crop. many secondary metabolites, such as tea polyphenols, theanine, and caffeine that accumulated in tea leaves are beneficial to human health. the fresh leaves of tea plant are harvested and timely processed into tea products with different flavors. the withering of fresh tea leaves is the first step in tea processing and directly affects tea color, taste, and fragrance. to understand the molecular mechanism that infl ... | 2017 | 28852881 |
| effect of fluoride treatment on gene expression in tea plant (camellia sinensis). | tea plant is a typical fluorine (f) accumulator. f concentration in mature tea leaves is several hundred times higher than that in normal field crops. long-term consumption of teas with high level f will increase the risks of dental and skeletal fluorosis. the mechanism of f accumulation in tea stands unclear. rna-seq and digital gene expression (dge) techniques were used to investigate the effect of f on the differential expressions of transcriptome in tea plant. the results showed that f conte ... | 2017 | 28851890 |
| ameliorative role of ethyl-acetate fraction of methanolic leaf extract of camellia sinensis (green tea) on streptozotocin-induced diabetes linked testicular hypofunction in albino rat: a dose-dependent biochemical and genomic transection study. | background the present investigation focuses the diabetes-induced testicular hypofunction and its possible correction by the effective dose of ethyl-acetate fraction of methanolic extract of camellia sinensis leaves through dose-dependent study in streptozotocin-induced diabetic rat. methods the androgenic, spermiological, oxidative stress and apoptosis sensors along with testicular genomic sensors were evaluated in a dose-dependent fashion (50 mg or 100 mg or 200 mg/kg body weight). activities ... | 2017 | 28850550 |
| role of green tea flavonoids and other related contents in cancer prevention. | green tea is made from camellia sinensis and leaves through the oxidation process. it mainly originates in china and has been used traditionally throughout asia. in the west, black tea has been used mostly, but green tea has become the most popular beverage throughout the world. it is also used as a raw material in cosmetics, health foods, and as an added ingredient in various beverages. different varieties of green tea are available. the main differences between the varieties are due to harvest ... | 2017 | 28845765 |
| transcriptomic analysis of flower development in tea (camellia sinensis (l.)). | flowering is a critical and complicated process in plant development, involving interactions of numerous endogenous and environmental factors, but little is known about the complex network regulating flower development in tea plants. in this study, de novo transcriptome assembly and gene expression analysis using illumina sequencing technology were performed. transcriptomic analysis assembles gene-related information involved in reproductive growth of c. sinensis. gene ontology (go) analysis of ... | 2017 | 28844668 |
| protective effects of theasinensin a against carbon tetrachloride-induced liver injury in mice. | theasinensins have been identified as a major group of unique catechin dimers mainly found in oolong tea and black tea. among several types of theasinensins, theasinensin a (tsa), an epigallocatechin gallate (egcg) dimer with an r-biphenyl bond, is the most abundant theasinensin prevalent in oolong tea. previous studies have reported that tsa exhibits antioxidative, anti-inflammatory and anti-cancer activities in vitro and in vivo. however, little is known about the hepatoprotective effect of ts ... | 2017 | 28831484 |
| analysis of theanine in tea (camellia sinensis) dietary ingredients and supplements by high-performance liquid chromatography with postcolumn derivatization: single-laboratory validation, first action 2016.10. | 2017 | 28825557 | |
| transcriptional profiling of catechins biosynthesis genes during tea plant leaf development. | a total of 299,113 unigenes were generated and 15,817 degs were identified. we identified candidate genes associated with the regulation of catechins biosynthesis during leaf development in tea plant. the tea plant (camellia sinensis (l.) o. kuntze) is one of the most economically significant crops worldwide because of its positive effects on human health. the health benefits of tea are mainly attributed to catechins, which are the predominant polyphenols that accumulate in tea. catechins are pr ... | 2017 | 28825226 |
| combinatorial effect of nicotine and black tea on heart rate variability: useful or harmful? | the effect of nicotine on heart rate variability (hrv) is controversial. autonomic nervous system is the main regulator of heart rhythm, and heart rate variability is an appropriate index to assessment of the effects of the autonomic system on heart. in this study, the combination effect of nicotine and black tea consumption on sympatho-vagal balance and heart rate variability was investigated in rats. male wistar rats were randomized into four groups as control, tea (2.5 g/100 cc, daily), nicot ... | 2017 | 28815936 |
| dietary polyphenols for atherosclerosis: a comprehensive review and future perspectives. | atherosclerosis is one of the most prevalent reasons for premature death in adults. despite the several conventional drugs in the market; many patients are not completely treated. here we comprehensively review current clinical evidence regarding the efficacy of dietary polyphenols in atherosclerosis and related complications. pubmed, cochrane library and scopus were searched from inception until august 2016 to obtain clinical trials in which polyphenols were evaluated in cardiovascular paramete ... | 2017 | 28812379 |
| stimulation in primary and secondary metabolism by elevated carbon dioxide alters green tea quality in camellia sinensis l. | rising co2 concentration, a driving force of climate change, is impacting global food security by affecting plant physiology. nevertheless, the effects of elevated co2 on primary and secondary metabolism in tea plants (camellia sinensis l.) still remain largely unknown. here we showed that exposure of tea plants to elevated co2 (800 µmol mol-1 for 24 d) remarkably improved both photosynthesis and respiration in tea leaves. furthermore, elevated co2 increased the concentrations of soluble sugar, ... | 2017 | 28801632 |
| studies on the biochemical formation pathway of the amino acid l-theanine in tea (camellia sinensis) and other plants. | tea (camellia sinensis) is the most widely consumed beverage aside from water. the flavor of tea is conferred by certain metabolites, especially l-theanine, in c. sinensis. to determine why more l-theanine accumulates in c. sinensis than in other plants, we compare l-theanine contents between c. sinensis and other plant species (camellia nitidissima, camellia japonica, zea mays, arabidopsis thaliana, and solanum lycopersicum) and use a stable isotope labeling approach to elucidate its biosynthet ... | 2017 | 28796499 |
| uptake, translocation, metabolism, and distribution of glyphosate in nontarget tea plant (camellia sinensis l.). | the uptake, translocation, metabolism, and distribution behavior of glyphosate in nontarget tea plant were investigated. the negative effects appeared to grown tea saplings when the nutrient solution contained glyphosate above 200 mg l-1. glyphosate was highest in the roots of the tea plant, where it was also metabolized to aminomethyl phosphonic acid (ampa). the glyphosate and ampa in the roots were transported through the xylem or phloem to the stems and leaves. the amount of ampa in the entir ... | 2017 | 28795804 |
| conventional and accelerated-solvent extractions of green tea (camellia sinensis) for metabolomics-based chemometrics. | metabolomics has emerged as an important analytical technique for multiple applications. the value of information obtained from metabolomics analysis depends on the degree to which the entire metabolome is present and the reliability of sample treatment to ensure reproducibility across the study. the purpose of this study was to compare methods of preparing complex botanical extract samples prior to metabolomics profiling. two extraction methodologies, accelerated solvent extraction and a conven ... | 2017 | 28787673 |
| chemical profiling of infusions and decoctions of helichrysum italicum subsp. picardii by uhplc-pda-ms and in vitro biological activities comparatively with green tea (camellia sinensis) and rooibos tisane (aspalathus linearis). | several medicinal plants are currently used by the food industry as functional additives, for example botanical extracts in herbal drinks. moreover, the scientific community has recently begun focusing on halophytes as sources of functional beverages. helichrysum italicum subsp. picardii (everlasting) is an aromatic halophyte common in southern europe frequently used as spice and in traditional medicine. in this context, this work explored for the first time h. italicum subsp. picardii as a pote ... | 2017 | 28787672 |
| chlorogenic acid isomer contents in 100 plants commercialized in brazil. | this study analysed 100 plants employed in brazil as ingredients to infusions for their caffeic acid, 3-caffeoylquinic acid (3-cqa), 4-caffeoylquinic acid (4-cqa), 5-caffeoylquinic acid (5-cqa), 3,4-dicaffeoylquinic acid (3,4-dqa), 3,5-dicaffeoylquinic acid (3,5-dqa), and 4,5-dicaffeoylquinic acid (4,5-dqa) contents. the samples were collected from public markets and analysed using ultra-high performance liquid chromatography (uplc). the highest concentrations of chlorogenic acids were found in ... | 2017 | 28784513 |
| synthesis, characterization, and application of a zn (ii)-imprinted polymer grafted on graphene oxide/magnetic chitosan nanocomposite for selective extraction of zinc ions from different food samples. | a novel zn(ii) imprinted polymer was synthesized via a co-precipitation method using graphene oxide/magnetic chitosan nanocomposite as supporting material. the synthesized imprinted polymer was characterized by fourier transform infrared spectrometry (ftir) and scanning electron microscopy (sem) and applied as a sorbent for selective magnetic solid phase extraction of zinc followed by its determination by flame atomic absorption spectrometry. the kinetic and isothermal adsorption experiments wer ... | 2017 | 28764087 |
| does oolong tea (camellia sinensis) made from a combination of leaf and stem smell more aromatic than leaf-only tea? contribution of the stem to oolong tea aroma. | the raw materials used to make oolong tea (camellia sinensis) are a combination of leaf and stem. oolong tea made from leaf and stem is thought to have a more aromatic smell than leaf-only tea. however, there is no available evidence to support the viewpoint. in this study, sensory evaluation and detailed characterization of emitted and internal volatiles (not readily emitted, but stored in samples) of dry oolong teas and infusions indicated that the presence of stem did not significantly improv ... | 2017 | 28764024 |
| formation and emission of linalool in tea (camellia sinensis) leaves infested by tea green leafhopper (empoasca (matsumurasca) onukii matsuda). | famous oolong tea (oriental beauty), which is manufactured by tea leaves (camellia sinensis) infected with tea green leafhoppers, contains characteristic volatile monoterpenes derived from linalool. this study aimed to determine the formation mechanism of linalool in tea exposed to tea green leafhopper attack. the tea green leafhopper responsible for inducing the production of characteristic volatiles was identified as empoasca (matsumurasca) onukii matsuda. e. (m.) onukii attack significantly i ... | 2017 | 28764007 |
| novel acetylcholinesterase inhibitors from zijuan tea and biosynthetic pathway of caffeoylated catechin in tea plant. | zijuan tea is a special cultivar of yunnan broad-leaf tea (camellia sinensis var. assamica) with purple buds, leaves, and stems. phytochemical study on this tea led to the discovery of three hydroxycinnamoylated catechins (hccs) (1-3), seven other catechins (4-10), three proanthocyanidins (11-13), five flavones and flavone glycosides (14-18), two alkaloids (19, 20), one steroid (21), and one phenylpropanoid glycoside (22). the isolation and structural elucidation of the caffeoylated catechin (1) ... | 2017 | 28763966 |
| characterization and expression profiling of camellia sinensis cinnamate 4-hydroxylase genes in phenylpropanoid pathways. | cinnamate 4-hydroxylase (c4h), a cytochrome p450-dependent monooxygenase, participates in the synthesis of numerous polyphenoid compounds, such as flavonoids and lignins. however, the c4h gene number and function in tea plants are not clear. we screened all available transcriptome and genome databases of tea plants and three c4h genes were identified and named csc4ha, csc4hb, and csc4hc, respectively. both csc4ha and csc4hb have 1518-bp open reading frames that encode 505-amino acid proteins. cs ... | 2017 | 28763022 |
| antioxidant properties of green tea aroma in mice. | green tea ('sencha'), made from the leaves of camellia sinensis, is the most well-researched antioxidant beverage. the major source of its antioxidant activity is polyphenols, consisting mainly of catechins (flavan-3-ols). however, little is known about the physiological effects of green tea aroma, which lacks catechins. in the present study, we performed inhalation experiments with green tea aroma to evaluate its antioxidant activity in mice. as a result, the urinary 8-hydroxydeoxyguanosine lev ... | 2017 | 28751804 |
| the anti-aging and anti-oxidation effects of tea water extract in caenorhabditis elegans. | tea includes puer tea, black tea, green tea and many others. by using model organism caenorhabditis elegans, the anti-aging and anti-oxidation effects of tea water extract were systemically examined in this study. we found that water extract of puer tea, black tea and green tea all increased the lifespan of worms, postponed aβ-induced progressive paralysis in alzheimer's disease transgenic worms, and improved the tolerance of worms to the oxidative stress induced by heavy metal cr6+. moreover, t ... | 2017 | 28750751 |
| transcriptome profiling using single-molecule direct rna sequencing approach for in-depth understanding of genes in secondary metabolism pathways of camellia sinensis. | characteristic secondary metabolites, including flavonoids, theanine and caffeine, are important components of camellia sinensis, and their biosynthesis has attracted widespread interest. previous studies on the biosynthesis of these major secondary metabolites using next-generation sequencing technologies limited the accurately prediction of full-length (fl) splice isoforms. herein, we applied single-molecule sequencing to pooled tea plant tissues, to provide a more complete transcriptome of c. ... | 2017 | 28744294 |
| olivibacter flavus sp. nov., a novel endophytic bacterium isolated from the root of camellia sinensis. | a novel gram-negative rod, endophytic bacterium, designated strain tmcc 8258t, was isolated from the root of camellia sinensis collected from puer, south-west china. comparative 16s rrna gene sequence analysis showed that the strain belongs to the family sphingobacteriaceae and a neighbour-joining phylogenetic tree suggested that strain tmcc 8258t formed a cluster with the type strain of olivibacter ginsengisoli (showed the highest 16s rrna gene sequence similarity of 95.8%). chemotaxonomic data ... | 2017 | 28577180 |
| paradigm shift of contamination risk of six heavy metals in tea (camellia sinensis l.) growing soil: a new approach influenced by inorganic and organic amendments. | the present study provides several contamination and ecological risk indices for selected metals (cd, cr, cu, mn, ni and zn) in tea (camellia sinensis l.; cv. s.3a/3) growing soil influenced by lower to higher doses of inorganic and organic amendments. while ecological risk indices were applied, it was observed that same treatment showed different risk levels but contamination risk status did not vary significantly. all the indices showed significant correlation with heavy metals' concentration ... | 2017 | 28575803 |
| c-geranylated flavanones from yingde black tea and their antioxidant and α-glucosidase inhibition activities. | 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. the compounds were further evaluated for antioxidant, α-glucosidase inhi ... | 2017 | 28554631 |
| quality improvement of a rice-substituted fried noodle by utilizing the protein-polyphenol interaction between a pea protein isolate and green tea (camellia sinensis) extract. | the quality of rice-substituted fried noodles was improved by applying interaction between pea protein isolate (ppi) and green tea extract (gte). radical-scavenging activities of gte were stably maintained when exposed to acidic ph, uv light, and fluorescent light, but decreased by approximately 65% when exposed to 80°c for 168h. the rva profiles of noodle dough showed that peak viscosity and breakdown increased significantly but that setback and final viscosity remained unchanged with 20% rice ... | 2017 | 28554624 |
| research on pyrolysis behavior of camellia sinensis branches via the discrete distributed activation energy model. | this study aims at investigating the pyrolysis behavior of camellia sinensis branches by the discrete distributed activation energy model (daem) and thermogravimetric experiments. then the discrete daem method is used to describe pyrolysis process of camellia sinensis branches dominated by 12 characterized reactions. the decomposition mechanism of camellia sinensis branches and interaction with components are observed. and the reaction at 350.77°c is a significant boundary of the first and secon ... | 2017 | 28551431 |
| what is in your cup of tea? dna verity test to characterize black and green commercial teas. | in this study, we used several molecular techniques to develop a fast and reliable protocol (dna verity test, dvt) for the characterization and confirmation of the species or taxa present in herbal infusions. as a model plant for this protocol, camellia sinensis, a traditional tea plant, was selected due to the following reasons: its historical popularity as a (healthy) beverage, its high selling value, the importation of barely recognizable raw product (i.e., crushed), and the scarcity of studi ... | 2017 | 28542606 |
| flavanols from the camellia sinensis var. assamica and their hypoglycemic and hypolipidemic activities. | α-glucosidase and lipase inhibitors play important roles in the treatment of hyperglycaemia and dyslipidemia. to identify novel naturally occurring inhibitors, a bioactivity-guided phytochemical research was performed on the pu-erh tea. one new flavanol, named (-)-epicatechin-3-o-(z)-coumarate (1), and 16 known analogs (2-17) were isolated from the aqueous extract of the pu-erh tea. their structures were determined by spectroscopic and chemical methods. furthermore, the water extract of pu-erh t ... | 2017 | 28540171 |