Publications
| Title | Abstract | Year Filter | PMID(sorted descending) Filter |
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| altering the phenolics profile of a green tea leaves extract using exogenous oxidases. | transformation from green tea leaves into black tea involves oxidation of catechins into theaflavins and other complex phenolics by endogenous enzymes in tea leaves. by employing tyrosinase and laccase, both from agaricus bisporus, on green tea catechins, the oxidation process was directed towards a higher theaflavins content, which is considered an important quality parameter in tea. the main tea catechins were incubated with tyrosinase and laccase, and product formation was monitored by rp-uhp ... | 2016 | 26593607 |
| antioxidant activities of distiller dried grains with solubles as protein films containing tea extracts and their application in the packaging of pork meat. | distiller dried grains with solubles (ddgs) as protein (dp) films were prepared. additionally, to prepare anti-oxidant films, green tea extract (gte), oolong tea extract (ote), and black tea extract (bte) were incorporated into the dp films. consequently, the incorporation of the tea extracts did not alter the physical properties of the films much, whereas the antioxidant activities, such as abts and dpph radical scavenging activities were observed. to apply the dp films containing tea extracts ... | 2016 | 26593480 |
| the effect of different drinks on the color stability of different restorative materials after one month. | the aim of this study was to evaluate the effect of three different drinks on the color parameters of four different restorative materials. | 2015 | 26587410 |
| next-generation sequencing reveals differentially amplified tandem repeats as a major genome component of northern europe's oldest camellia japonica. | northern europe's oldest and largest camellia japonica growing at the pillnitz castle (germany) for over 200 years is of botanical and cultural importance and is a reference for c. japonica molecular scale analysis. in order to provide a fundament for genome analysis of the genus camellia, we characterize the c. japonica tandem repeat fraction, constituting 12.5 % of the pillnitz camellia's genome. a genomic library of the pillnitz c. japonica was produced and illumina sequenced to generate 36 g ... | 2015 | 26582634 |
| black tea extract and its theaflavin derivatives inhibit the growth of periodontopathogens and modulate interleukin-8 and β-defensin secretion in oral epithelial cells. | over the years, several studies have brought evidence suggesting that tea polyphenols, mostly from green tea, may have oral health benefits. since few data are available concerning the beneficial properties of black tea and its theaflavin derivatives against periodontal disease, the objective of this study was to investigate their antibacterial activity as well as their ability to modulate interleukin-8 and human β-defensin (hbd) secretion in oral epithelial cells. among the periodontopathogenic ... | 2015 | 26581041 |
| mechanisms of body weight reduction and metabolic syndrome alleviation by tea. | tea, a popular beverage made from leaves of the plant camellia sinensis, has been shown to reduce body weight, alleviate metabolic syndrome, and prevent diabetes and cardiovascular diseases in animal models and humans. such beneficial effects have generally been observed in most human studies when the level of tea consumption was three to four cups (600-900 mg tea catechins) or more per day. green tea is more effective than black tea. in spite of numerous studies, the fundamental mechanisms for ... | 2016 | 26577614 |
| estimation of flavonoid intake in older australians: secondary data analysis of the blue mountains eye study. | flavonoids, consumed in plant-based foods, have been linked to risk reduction of cancers, cardiovascular, and neurodegenerative diseases. the paucity of information on dietary sources and quantities of flavonoid intake in older adults limits interpretation of epidemiological studies that link flavonoid intake with health outcomes in this population. it was our aim to describe total flavonoid intake, including flavonoid subclasses, in older australians and to identify rich and commonly consumed s ... | 2015 | 26571356 |
| regulation of formation of volatile compounds of tea (camellia sinensis) leaves by single light wavelength. | regulation of plant growth and development by light wavelength has been extensively studied. less attention has been paid to effect of light wavelength on formation of plant metabolites. the objective of this study was to investigate whether formation of volatiles in preharvest and postharvest tea (camellia sinensis) leaves can be regulated by light wavelength. in the present study, in contrast to the natural light or dark treatment, blue light (470 nm) and red light (660 nm) significantly incre ... | 2015 | 26567525 |
| biotechnological advances in tea (camellia sinensis [l.] o. kuntze): a review. | this article presents a comprehensive review on the success and limitations of biotechnological approaches aimed at genetic improvement of tea with a purpose to explore possibilities to address challenging areas. tea is a woody perennial tree with a life span of more than 100 years. conventional breeding of tea is slow and limited primarily to selection which leads to narrowing down of its genetic base. harnessing the benefits of wild relatives has been negligible due to low cross-compatibility, ... | 2016 | 26563347 |
| black tea: phytochemicals, cancer chemoprevention, and clinical studies. | tea (camellia sinensis l.) is the most popular, flavored, functional, and therapeutic non-alcoholic drink consumed by two-thirds of the world's population. black tea leaves are reported to contain thousands of bioactive constituents such as polyphenols, amino acids, volatile compounds, and alkaloids that exhibit a range of promising pharmacological properties. due to strong antioxidant property, black tea inhibits the development of various cancers by regulating oxidative damage of biomolecules, ... | 2017 | 26561007 |
| antioxidant activity and phenolic content of leaf infusions of myrtaceae species from cerrado (brazilian savanna). | abstractthere is considerable interest in identifying new antioxidants from plant materials. several studies have emphasized the antioxidant activity of species belonging to the myrtaceae family. however, there are few reports on these species from the cerrado (brazilian savanna). in this study, the antioxidant activity and phenolic content of 12 native myrtaceae species from the cerrado were evaluated (blepharocalyx salicifolius, eugenia bimarginata, eugenia dysenterica, eugenia klotzschiana, h ... | 2015 | 26560669 |
| isolation and expression analysis of 18 csbzip genes implicated in abiotic stress responses in the tea plant (camellia sinensis). | basic leucine zipper (bzip) transcription factors (tfs) play essential roles in regulating stress processes in plants. despite the economic importance of this woody crop, there is little information about bzip tfs in tea plants. in this study, 18 bzip genes were isolated from the tea plant (camellia sinensis) and named sequentially from csbzip1 to csbzip18. according to the phylogenetic classification as in arabidopsis, the csbzip genes spanned ten subgroups (group a, b, c, d, e, f, h, i, s and ... | 2015 | 26555901 |
| topical lipophilic epigallocatechin-3-gallate on herpes labialis: a phase ii clinical trial of averteax formula. | previous in vitro and in vivo studies indicated that catechins from the tea plant (camellia sinensis) have a therapeutic effect on herpes simplex virus infections. the aim of this study was to clinically evaluate a topical proprietary formulation containing lipophilic catechins (averteax, camellix, llc, evans, ga, usa) on recurrent herpes labialis. | 2015 | 26548726 |
| tea polyphenols as an antivirulence compound disrupt quorum-sensing regulated pathogenicity of pseudomonas aeruginosa. | green tea, a water extract of non-fermented leaves of camellia sinensis l., is one of the nonalcoholic beverages in china. it is becoming increasingly popular worldwide, because of its refreshing, mild stimulant and medicinal properties. here we examined the quorum sensing inhibitory potentials of tea polyphenols (tp) as antivirulence compounds both in vitro and in vivo. biosensor assay data suggested minimum inhibitory concentrations (mics) of tp against selected pathogens were 6.25 ~ 12.5 mg/m ... | 2015 | 26548447 |
| natural polyphenols: potential in the prevention of sexually transmitted viral infections. | sexually transmitted viral infections represent a major public health concern due to lack of effective prevention strategies. efforts are ongoing to develop modalities that can enable simultaneous prevention of multiple sexually transmitted infections. in the present review, we discuss the potential of natural polyphenols to prevent sexually transmitted viral infections. the review gives an account of various in vitro and in vivo studies carried out on epigallocatechin gallate, theaflavins (blac ... | 2016 | 26546859 |
| toothpastes containing abrasive and chemical whitening agents: efficacy in reducing extrinsic dental staining. | this in vitro study evaluated the efficacy of toothpastes containing abrasive and chemical whitening agents in reducing the extrinsic discoloration of dental enamel. sixty slabs of dentin from human teeth were sealed so that only the enamel surface was exposed. the enamel surfaces were photographed for initial color assessment. staining was performed by immersing the dental slabs in 0.2% chlorhexidine solution for 2 minutes and then in black tea for 60 minutes. this process was repeated 15 times ... | 2017 | 26545284 |
| genome-wide identification of genes probably relevant to the uniqueness of tea plant (camellia sinensis) and its cultivars. | tea (camellia sinensis) is a popular beverage all over the world and a number of studies have focused on the genetic uniqueness of tea and its cultivars. however, molecular mechanisms underlying these phenomena are largely undefined. in this report, based on expression data available from public databases, we performed a series of analyses to identify genes probably relevant to the uniqueness of c. sinensis and two of its cultivars (lj43 and zh2). evolutionary analyses showed that the evolutiona ... | 2015 | 26543846 |
| new sample preparation method for quantification of phenolic compounds of tea (camellia sinensis l. kuntze): a polyphenol rich plant. | chemical analysis of the sri lankan tea (camellia sinensis, l.) germplasm would immensely contribute to the success of the tea breeding programme. however, the polyphenols, particularly catechins (flavan-3-ols), are readily prone to oxidation in the conventional method of sample preparation. therefore, optimization of the present sample preparation methodology for the profiling of metabolites is much important. two sample preparation methodologies were compared, fresh leaves (as in the conventio ... | 2015 | 26543665 |
| plants and other natural products used in the management of oral infections and improvement of oral health. | challenges of resistance to synthetic antimicrobials have opened new vistas in the search for natural products. this article rigorously reviews plants and other natural products used in oral health: punica granatum l. (pomegranate), matricaria recutita l. (chamomile), camellia sinensis (l.) kuntze (green tea), chewing sticks made from diospyros mespiliformis hochst. ex a.d.c., diospyros lycioides desf., and salvadora persica l. (miswak), honey and propolis from the manuka tree (leptospermum scop ... | 2016 | 26522671 |
| a systematic review of medicinal plants used for weight loss in brazil: is there potential for obesity treatment? | obesity is a pandemic disease and its prevalence is still increasing. moreover, it has important costs to public health. in brazil, many plants are used for weight loss by overweight or obese people, but there is a lack of scientific basis for this practice. many ethnobotanical studies aiming to characterize this usage have been published, but they are still limited by the region considered and the diversity of the popular knowledge. | 2015 | 26520790 |
| cs-mir156 is involved in the nitrogen form regulation of catechins accumulation in tea plant (camellia sinensis l.). | the nitrogen source affects the growth of tea plants and regulates the accumulation of catechins in the leaves. in this report, we assessed the influences of nh4(+) and no3(-) on plant growth, catechins accumulation and associated gene expression. compared with the preferential nitrogen source nh4(+), when no3(-) was supplied as the sole nitrogen source, tea plants showed similar symptoms with the nitrogen-free treatments and showed lower nitrogen, free amino acid accumulation, chlorophyll conte ... | 2015 | 26520678 |
| analysis of stereochemistry and biosynthesis of epicatechin in tea plants by chiral phase high performance liquid chromatography. | tea (camellia sinensis) is rich in flavan-3-ols (catechins), especially epicatechin (ec), which is the predominant extension unit of polymeric proanthocyanidins (pas). however, studies assessing ec's stereochemistry are scarce. here, a high performance liquid chromatography column using amylose tris-(3, 5-dimethylphenylcarbamate) immobilized on silica-gel as chiral stationary phases (csps) was applied to explore its stereochemistry and biosynthetic pathway in tea plants. the results revealed (-) ... | 2015 | 26519617 |
| erratum: relationship between gene expression and the accumulation of catechin during spring and autumn in tea plants (camellia sinensis l.). | [this corrects the article doi: 10.1038/hortres.2015.11.][this corrects the article doi: 10.1038/hortres.2015.11.]. | 2015 | 26506527 |
| relationship between gene expression and the accumulation of catechin during spring and autumn in tea plants (camellia sinensis l.). | the tea plant (camellia sinensis l.) is an important commercial crop with remarkably high catechin concentrations. tea is popular worldwide given the plant's health benefits. catechins are the main astringent substance in tea and are synthesized mainly via the phenylpropanoid pathway. in this study, eight cultivars of tea plants harvested both in spring and autumn were used to investigate differences in catechin concentrations by using high-performance liquid chromatography. the expression level ... | 2015 | 26504566 |
| varietal identification of tea (camellia sinensis) using nanofluidic array of single nucleotide polymorphism (snp) markers. | apart from water, tea is the world's most widely consumed beverage. tea is produced in more than 50 countries with an annual production of approximately 4.7 million tons. the market segment for specialty tea has been expanding rapidly owing to increased demand, resulting in higher revenues and profits for tea growers and the industry. accurate varietal identification is critically important to ensure traceability and authentication of premium tea products, which in turn contribute to on-farm con ... | 2014 | 26504544 |
| nontargeted analysis using ultraperformance liquid chromatography-quadrupole time-of-flight mass spectrometry uncovers the effects of harvest season on the metabolites and taste quality of tea (camellia sinensis l.). | the chemical composition and taste quality of tea fluctuate seasonally. however, the compounds responsible for the seasonal variation of metabolic pattern and taste quality are far from clear. this study compared the metabolite profiles of green teas of nine varieties that were plucked in spring, summer, and autumn by using ultraperformance liquid chromatography-quadrupole time-of-flight mass spectrometry (uplc-q-tof/ms) on a reversed phase column. a multivariate analysis indicated distinct diff ... | 2015 | 26494158 |
| reidentification of sex pheromones of tea geometrid ectropis obliqua prout (lepidoptera: geometridae). | tea geometrid ectropis obliqua prout (lepidoptera: geometridae) is an important defoliator of the tree crop camellia sinensis l. in china. the sex pheromones of e. obliqua have not been identified, but have potential importance relative to the biological control of this predator. in this study, the female sex pheromones of e. obliqua were identified and evaluated for use in the monitoring and mass trapping of this pest. the sex pheromone extracts were subjected to gas chromatography-electroanten ... | 2016 | 26491188 |
| compounds derived from epigallocatechin-3-gallate (egcg) as a novel approach to the prevention of viral infections. | pathogenic viral infections pose major health risks to humans and livestock due to viral infection-associated illnesses such as chronic or acute inflammation in crucial organs and systems, malignant and benign lesions. these lead to large number of illnesses and deaths worldwide each year. outbreaks of emerging lethal viruses, such as ebola virus, severe acute respiratory syndrome (sars) virus and middle east respiratory syndrome (mers) virus, could lead to epidemics or even pandemics if they ar ... | 2015 | 26490660 |
| micronutrients (b, co, cu, fe, mn, mo and zn) content in made tea (camellia sinensis l.) and tea infusion with health prospect: a critical review. | tea (camellia sinensis l.) is a perennial acidophilic crop, and known to be a non-alcoholic stimulating beverage that is most widely consumed after water. the aim of this review paper is to provide a detailed documentation of selected micronutrient contents, viz. boron (b), cobalt (co), copper (cu), iron (fe), manganese (mn), molybdenum (mo) and zinc (zn) in made tea and tea infusion. available data from the literature were used to calculate human health aspect associated with the consumption of ... | 2015 | 26478953 |
| camellia sinensis mediated enhancement of humoral immunity to particulate and non-particulate antigens. | the most common drinking beverage in large portion of the world is camellia sinensis (green tea). in the present study, we evaluated the adjuvant effect of green tea and tea polyphenols to particulate and non-particulate antigens. balb/c mice were immunized with particulate and non-particulate antigens. modulation of immunoglobulin-secreting splenocytes, igg-mediated and igm-mediated immunity, was evaluated by hemolytic plaque assay and enzyme-linked immunosorbent assay, respectively. dose-depen ... | 2016 | 26478000 |
| effect of black tea on antioxidant, textural, and sensory properties of chinese steamed bread. | black tea is rich in phenolic antioxidants and has various health benefits. chinese steamed bread (csb) is a traditional food produced through steaming of fermented dough. black tea extracts were incorporated into northern style csb formulation at varying concentrations up to 175mg gallic acid equivalent/gram of wheat flour. gelatinization properties of wheat flour were not affected by the black tea addition. rheological analysis of wheat flour showed that black tea increased pasting viscosity, ... | 2016 | 26471674 |
| volatile compounds and sensory characteristics of various instant teas produced from black tea. | various instant teas produced differently from black tea [freeze-dried instant tea (fdit), spray-dried instant tea (sdit), and decaffeinated instant tea (dcit)], were compared for their differences in volatile compounds as well as descriptive sensory analysis (dsa). a total of 63 volatile compounds in all tea samples (eight aldehydes, ten alcohols, nine ketones, five esters, eight acids, ten terpenes/terpenoids, ten furans/furanones, two pyrroles, and one miscellaneous compound) were tentatively ... | 2016 | 26471629 |
| simultaneous determination of free amino acids in pu-erh tea and their changes during fermentation. | pu-erh ripened tea is produced through a unique microbial fermentation process from the sun-dried leaves of large-leaf tea species (camellia sinensis (linn.) var. assamica (masters) kitamura) in yunnan province of china. in this study, the changes of amino acid profiles during fermentation of pu-erh tea were investigated, based on the improved hplc-uv method with pitc pre-column derivatization for the simultaneous determination of twenty free amino acids. results showed that aspartic acid, gluta ... | 2016 | 26471603 |
| green tea extract for external anogenital warts. | catephen (kora corporation ltd) is a herbal medicinal product consisting predominantly of catechins (sinecatechins) extracted from camellia sinensis (l.) o. kuntze folium (green tea leaf) formulated as a topical preparation for the treatment of external genital and perianal warts (condylomata acuminata).(1) marketing authorisation for an ointment containing 0.1g of green tea extract per gram (10%) was granted by the medicines and healthcare products regulatory agency (mhra) under the mutual reco ... | 2015 | 26471269 |
| slow release of plant volatiles using sol-gel dispensers. | the black citrus aphid, also known as the tea aphid, (toxoptera aurantii boyer) attacks economically important crops, including tea (camellia sinensis (l.) o. kuntze). in the current study, silica sol-gel formulations were screened to find one that could carry and release c. sinensis plant volatiles to lure black citrus aphids in a greenhouse. the common plant volatile trans-2-hexen-1-al was used as a model molecule to screen for suitable sol-gel formulations. a znose (electronic sensor technolo ... | 2014 | 26470065 |
| anti-aging potential of phytoextract loaded-pharmaceutical creams for human skin cell longetivity. | the exposure to ultraviolet radiations (uvr) is the key source of skin sunburn; it may produce harmful entities, reactive oxygen species (ros), leading to aging. the skin can be treated and protected from the injurious effects of ros by using various pharmaceutical formulations, such as cream. cream can be loaded with antioxidants to quench ros leading to photo-protective effects. moreover, modern medicines depend on ethnobotanicals for protection or treatment of human diseases. this review arti ... | 2015 | 26448818 |
| comparison between folin-ciocalteu and prussian blue assays to estimate the total phenolic content of juices and teas using 96-well microplates. | folin-ciocalteu colorimetric assay (fc) is the most widely used assay to estimate the total phenolic content in foods, beverages, herbs and other plant extracts, but many chemical compounds may act as interfering agents, producing inaccurate estimations of the real concentration of phenolic compounds in the matrix. based on this limitation, the objective of this study was to compare, quantitatively, the folin-ciocalteu and prussian blue (pb) assays in estimating the total phenolic content in pur ... | 2015 | 26448565 |
| differential metabolic profiles during the albescent stages of 'anji baicha' (camellia sinensis). | 'anji baicha' is an albino tea cultivar with white shoots at low air temperature and green shoots at high air temperature in early spring. the metabolite contents in the shoots dynamically vary with the color changes and with shoot development. to investigate the metabolomic variation during the albescent and re-greening stages, gas chromatography-mass spectrometry combined with multivariate analysis were applied to analyze the metabolite profiles in the different color stages during the develop ... | 2015 | 26444680 |
| long-term intake of white tea prevents oxidative damage caused by adriamycin in kidney of rats. | white tea infusion (camelia sinensis) has antioxidants properties. the infusion contains polyphenols that have been proposed to induce antioxidant response element (are) response via nuclear factor e2-related factor 2 (nrf2). adriamycin (adr) has antitumour properties and oxidative effects. oxidative stress is related to a variety of kidney diseases. prevention of the oxidative stress through long-term intake of white tea and the study of the molecular mechanisms involved in protection could be ... | 2016 | 26441376 |
| role of nicotine and camellia sinensis on the developing femur of chick. | to study the harmful effects of nicotine on the developing femur of chick and to observe the role of antioxidant camellia sinensis in the prevention of these effects. | 2015 | 26440840 |
| arrhythmogenic risk assessment following four-week pretreatment with nicotine and black tea in rat. | there is the controversy concerning the main component of tobacco, which is responsible for its arrhythmogenesis. in addition, there is the lack of adequate information about the influence of combination of black tea and nicotine on heart rhythm. | 2015 | 26436072 |
| an improved method for thin layer chromatographic analysis of saponins. | analysis of saponins by thin layer chromatography (tlc) is reported. the solvent system was n-butanol:water:acetic acid (84:14:7). detection of saponins on the tlc plates after development and air-drying was done by immersion in a suspension of sheep erythrocytes, followed by washing off the excess blood on the plate surface. saponins appeared as white spots against a pink background. the protocol provided specific detection of saponins in the saponins enriched extracts from aesculusindica (wall ... | 2012 | 26434348 |
| determination of catechins and flavonol glycosides in chinese tea varieties. | a standardised profiling method based on high performance liquid chromatography combined with ultraviolet (uv) and mass spectrometric detection (ms) was established to analyse the phenolic compounds of selected tea varieties used for manufacturing of green, black and oolong teas. the composition and content of 24 tea constituents were analysed, including catechins, flavonol and flavones glycosides, phenolic acids and purine alkaloids. each tea variety had a unique chemical profile. the compositi ... | 2012 | 26434273 |
| identification, classification, and expression profiles of heat shock transcription factors in tea plant (camellia sinensis) under temperature stress. | in vascular plants, heat shock transcription factors (hsfs) regulate heat stress response by regulating the expression of heat shock proteins. this study systematically and comprehensively analyzed the hsf family in tea plant [camellia sinensis (l.) o. kuntze]. a total of 16 cshsfs were identified from the transcriptome database of tea plant and analyzed for their phylogenetic relationships, motifs, and physicochemical characteristics. on the basis of the phylogenetic comparison of tea plant wit ... | 2016 | 26431998 |
| the effect of herbal tea containing fenugreek seed on the signs of breast milk sufficiency in iranian girl infants. | one of the important reasons behind termination of breast-feeding in the first six months after childbirth is insufficient production of breast milk. | 2015 | 26430522 |
| transcriptional responses and flavor volatiles biosynthesis in methyl jasmonate-treated tea leaves. | tea (camellia sinensis) has long been consumed worldwide for its amazing flavor and aroma. methyl jasmonate (meja), which acts as an effective elicitor among the plant kingdom, could mostly improve the quality of tea aroma by promoting flavor volatiles in tea leaves. although a variety of volatile secondary metabolites that contribute to aroma quality have been identified, our understanding of the biosynthetic pathways of these compounds has remained largely incomplete. therefore, information ab ... | 2015 | 26420557 |
| intake and major sources of dietary flavonoid in korean adults: korean national health and nutrition examination survey 2010-2012. | with an effort to investigate possible relationship between flavonoids and health, an accurate estimation of flavonoid intake is valuable. we estimated dietary flavonoid intake and identified the major food sources. subjects were healthy adults aged >=19 y (n=11,474) who completed the 24-h dietary recall of the korean national health and nutritional examination survey (2010-2012). the us department of agriculture and newly estimated or published values for typical korean foods were combined into ... | 2015 | 26420187 |
| synergy between antibiotics and natural agents results in increased antimicrobial activity against staphylococcus epidermidis. | staphylococcus epidermidis is one of the most frequent causes of biofilm-associated infections on indwelling medical devices. with the emergence of methicillin-resistant s. epidermidis (mrse), there is an urgent need to discover novel active agents against a range of gram-positive pathogens. we screened the clinical isolates of s. epidermidis for susceptibility/resistance against commonly prescribed antibiotics. furthermore, we tested some natural agents alone and in combination with antibiotics ... | 2015 | 26409732 |
| in vitro antioxidant effect of camellia sinensis on human cell cultures. | camellia sinensisis traditionally used in many polyherbal preparations for the treatment of different diseases and infections. its action has been associated with its antioxidant activities. in this study, antioxidant effect of camellia sinensis on hydrogen peroxide-induced human lymphocyte cell cultures was estimated. camellia sinensis showed high contents of ascorbic acid, phenols, flavonoids, and flavonols. good scavenging activity was evident by scavenging assays e.g. 2,2-diphenyl-2-picrylhy ... | 2015 | 26408866 |
| dissipation pattern, processing factors, and safety evaluation for dimethoate and its metabolite (omethoate) in tea (camellia sinensis). | residue levels of dimethoate and its oxon metabolite (omethoate) during tea planting, manufacturing, and brewing were investigated using a modified quechers sample preparation and gas chromatography. dissipation of dimethoate and its metabolite in tea plantation followed the first-order kinetic with a half-life of 1.08-1.27 d. tea manufacturing has positive effects on dimethoate dissipation. processing factors of dimethoate are in the range of 2.11-2.41 and 1.41-1.70 during green tea and black t ... | 2015 | 26406463 |
| chinese green tea and acute hepatitis: a rare yet recurring theme. | a previously healthy 16-year-old girl presented with signs of acute hepatitis. on initial enquiry, she had not taken any prescribed or 'over-the-counter' medications, and there was no recent travel history. further investigations revealed no viral, autoimmune or metabolic cause of hepatitis. only following specific questioning did she reveal that she had, in the preceding 3 months, regularly consumed internet ordered chinese green tea, which contained camellia sinensis. after ceasing green tea c ... | 2015 | 26400588 |
| rainwater, soil water, and soil nitrate effects on oxygen isotope ratios of nitrous oxide produced in a green tea (camellia sinensis) field in japan. | the oxygen exchange fraction between soil h(2)o and n(2)o precursors differs in soils depending on the responsible n(2)o-producing process: nitrification or denitrification. this study investigated the o-exchange between soil h(2)o and n(2)o precursors in a green tea field with high n(2)o emissions. | 2015 | 26377018 |
| a single oral administration of theaflavins increases energy expenditure and the expression of metabolic genes. | theaflavins are polyphenols found in black tea, whose physiological activities are not well understood. this study on mice evaluated the influence of a single oral administration of theaflavins on energy metabolism by monitoring the initial metabolic changess in skeletal muscle and brown adipose tissue (bat). oxygen consumption (vo2) and energy expenditure (ee) were increased significantly in mice treated with theaflavin rich fraction (tf) compared with the group administered vehicle alone. ther ... | 2015 | 26375960 |
| pyrrolizidine alkaloids in food and feed on the belgian market. | pyrrolizidine alkaloids (pas) are widely distributed plant toxins with species dependent hepatotoxic, carcinogenic, genotoxic and pneumotoxic risks. in a recent european food safety authority (efsa) opinion, only two data sets from one european country were received for honey, while one feed data set was included. no data are available for food or feed samples from the belgian market. we developed an lc-ms/ms method, which allowed the detection and quantification of 16 pas in a broad range of ma ... | 2015 | 26373269 |
| transcriptome analysis reveals key flavonoid 3'-hydroxylase and flavonoid 3',5'-hydroxylase genes in affecting the ratio of dihydroxylated to trihydroxylated catechins in camellia sinensis. | the ratio of dihydroxylated to trihydroxylated catechins (rdtc) is an important indicator of tea quality and biochemical marker for the study of genetic diversity. it is reported to be under genetic control but the underlying mechanism is not well understood. flavonoid 3'-hydroxylase (f3'h) and flavonoid 3',5'-hydroxylase (f3'5'h) are key enzymes involved in the formation of dihydroxylated and trihydroxylated catechins. the transcriptome and hplc analysis of tea samples from longjing43 and zhong ... | 2015 | 26367395 |
| pyrrolizidine and tropane alkaloids in teas and the herbal teas peppermint, rooibos and chamomile in the israeli market. | dehydro pyrrolizidine alkaloids (dehydro pas) are carcinogenic phytotoxins prevalent in the boraginaceae, asteraceae and fabaceae families. dehydro pas enter the food and feed chain by co-harvesting of crops intended for human and animal consumption as well as by carry-over into animal-based products such as milk, eggs and honey. recently the occurrence of dehydro pas in teas and herbal teas has gained increasing attention from the eu, due to the high levels of dehydro pas found in commercially ... | 2015 | 26365752 |
| effects of flavonol-rich green tea cultivar (camellia sinensis l.) on plasma oxidized ldl levels in hypercholesterolemic mice. | to examine the possible benefits of tea flavonols, we compared anti-atherogenic effects between common and flavonol-rich tea cultivars. the tea infusion made from a flavonol-rich cultivar, but not a common cultivar, significantly decreased the plasma oxidized low-density lipoprotein level in mice fed a high-cholesterol diet. the result suggests that tea flavonols have the potential to protect against cardiovascular diseases. | 2016 | 26364623 |
| antagonistic potential of native trichoderma viride strain against potent tea fungal pathogens in north east india. | indigenous strains of trichoderma species isolated from rhizosphere soils of tea gardens of assam, north eastern state of india were assessed for in vitro antagonism against two important tea fungal pathogens namely pestalotia theae and fusarium solani. a potent antagonist against both tea pathogenic fungi, designated as sdrlin1, was selected and identified as trichoderma viride. the strain also showed substantial antifungal activity against five standard phytopathogenic fungi. culture filtrate ... | 2015 | 26361476 |
| tea consumption and cognitive impairment: a cross-sectional study among chinese elderly. | laboratorial and epidemiological researches suggested that tea exhibited potential neuroprotective effect which may prevent cognitive impairment, but there were few data among the elderly aged 60 years and above in china. | 2015 | 26359663 |
| black tea consumption and risk of skin cancer: an 11-year prospective study. | tea consumption has been shown to protect against skin carcinogenesis in laboratory-based studies; however, epidemiological evidence is limited and inconsistent. this prospective study examined the association between black tea consumption and the incidence of basal cell carcinoma (bcc) and squamous cell carcinoma (scc). usual black tea consumption was estimated from food frequency questionnaires completed in 1992, 1994, and 1996 by 1,325 australian adults. all histologically confirmed skin canc ... | 2015 | 26359536 |
| multiresidue determination of pesticides in tea by gas chromatography-tandem mass spectrometry. | an efficient and reliable gc-ms/ms method for the multiresidue determination of pesticides in tea was developed by modifying the japanese official multiresidue method. sample preparation was carefully optimized for the efficient removal of coextracted matrix components. the optimal sample preparation procedure involved swelling of the sample in water; extraction with acetonitrile; removal of water by salting-out; and sequential cleanup by ods, graphitized carbon black/primary secondary amine (gc ... | 2015 | 26357887 |
| towards biological plausibility of electronic noses: a spiking neural network based approach for tea odour classification. | the paper presents a novel encoding scheme for neuronal code generation for odour recognition using an electronic nose (en). this scheme is based on channel encoding using multiple gaussian receptive fields superimposed over the temporal en responses. the encoded data is further applied to a spiking neural network (snn) for pattern classification. two forms of snn, a back-propagation based spikeprop and a dynamic evolving snn are used to learn the encoded responses. the effects of information en ... | 2015 | 26356597 |
| comparative evaluation of five plant extracts and juices for nanoiron synthesis and application for hexavalent chromium reduction. | the effectiveness of five plant extracts and juices, i.e. extracts of camellia sinensis (green tea, gt), syzygium aromaticum (clove, cl), mentha spicata (spearmint, sm), punica granatum juice (pomegranate, pg) and red wine (rw), for the production of nanoiron suspensions and their application for cr(vi) reduction was investigated. polyphenols contained in extracts act as reducing agents for iron ions in aqueous solutions, forming thus iron nanoparticles, and stabilize the nanoparticles produced ... | 2016 | 26356183 |
| green tea component egcg, insulin and igf-1 promote nuclear efflux of atrophy-associated transcription factor foxo1 in skeletal muscle fibers. | prevention and slowing of skeletal muscle atrophy with nutritional approaches offers the potential to provide far-reaching improvements in the quality of life for our increasingly aging population. here we show that polyphenol flavonoid epigallocatechin 3-gallate (egcg), found in the popular beverage green tea (camellia sinensis), demonstrates similar effects to the endogenous hormones insulin-like growth factor 1 (igf-1) and insulin in the ability to suppress action of the atrophy-promoting tra ... | 2015 | 26344776 |
| complementary transcriptomic and proteomic analyses of a chlorophyll-deficient tea plant cultivar reveal multiple metabolic pathway changes. | to uncover the mechanisms that underlie the chlorina phenotype of the tea plant, this study employs morphological, biochemical, transcriptomic, and itraq-based proteomic analyses to compare the green tea cultivar lj43 and the yellow-leaf tea cultivar zh1. zh1 exhibited the chlorina phenotype, with significantly decreased chlorophyll content and abnormal chloroplast development compared with lj43. zh1 also displayed higher theanine and free amino acid content and lower carotenoid and catechin con ... | 2016 | 26344129 |
| investigation of adverse effects of interactions between herbal drugs and natural blood clotting mechanism. | throughout the world, herbal medicines are consumed by most of the patients without considering their adverse effects. many herbal medicines/plant extracts have been reported to interact with the natural blood clotting system. in continuation to this effort, thirty medicinal plant extracts were allowed to interact with citrated human blood and the clotting time was measured after re-calcification in vitro using lee and white method. the aq. leaf ext. of syzygium cumini and camellia sinensis sign ... | 2016 | 26340850 |
| the acute effects of green tea and carbohydrate coingestion on systemic inflammation and oxidative stress during sprint cycling. | green tea (camellia sinensis) has anti-oxidative and anti-inflammatory effects, which may be beneficial to athletes performing high-intensity exercise. this study investigated the effects of carbohydrate and green tea coingestion on sprint cycling performance and associated oxidative stress and immunoendocrine responses to exercise. in a crossover design, 9 well-trained male cyclists completed 3 sets of 8 repetitions of 100-m uphill sprint cycling while ingesting green tea and carbohydrate (tea) ... | 2015 | 26319564 |
| ca(2+) and cam are involved in al(3+) pretreatment-promoted fluoride accumulation in tea plants (camellia sinesis l.). | tea plant (camellia sinensis (l.) o. kuntze) is known to be a fluoride (f) and aluminum (al(3+)) hyper-accumulator. previous study showed that pre-treatment of al(3+) caused a significant increase of f accumulation in tea plants. however, less is known about the intricate network of al(3+) promoted f accumulation in tea plants. in this study, the involvement of endogenous ca(2+) and cam in al(3+) pretreatment-promoted f accumulation in tea plants was investigated. our results showed that al(3+) ... | 2015 | 26318146 |
| transcriptome-wide identification of camellia sinensis wrky transcription factors in response to temperature stress. | tea plant [camellia sinensis (l.) o. kuntze] is a leaf-type healthy non-alcoholic beverage crop, which has been widely introduced worldwide. tea is rich in various secondary metabolites, which are important for human health. however, varied climate and complex geography have posed challenges for tea plant survival. the wrky gene family in plants is a large transcription factor family that is involved in biological processes related to stress defenses, development, and metabolite synthesis. there ... | 2016 | 26308611 |
| effects of brewing conditions on the antioxidant capacity of twenty-four commercial green tea varieties. | a novel paper-based nanoceria reducing antioxidant capacity (nanocerac) assay for antioxidant detection (sharpe, frasco, andreescu, & andreescu, 2012), has been adapted for the first time as a high-throughput method, in order to measure the effect of brewing conditions and re-infusion on the antioxidant capacity of twenty-four commercial green teas. the oxygen radical absorbance capacity (orac) assay, frequently applied to complex foods and beverages, was used as a comparator measure of antioxid ... | 2016 | 26304363 |
| using uv-vis spectroscopy for simultaneous geographical and varietal classification of tea infusions simulating a home-made tea cup. | in this work we proposed a method to verify the differentiating characteristics of simple tea infusions prepared in boiling water alone (simulating a home-made tea cup), which represents the final product as ingested by the consumers. for this purpose we used uv-vis spectroscopy and variable selection through the successive projections algorithm associated with linear discriminant analysis (spa-lda) for simultaneous classification of the teas according to their variety and geographic origin. for ... | 2016 | 26304362 |
| pantoea theicola sp. nov., isolated from black tea. | a gram-negative, facultatively anaerobic strain was isolated from black tea. on the basis of 16s rrna gene sequence similarity comparisons, strain qc88-366t was grouped into the genus pantoea, being related most closely to the type strains of pantoea gaviniae (98.5 %) and pantoea calida (98.3 %); sequence similarities were ≤ 97.0 % to the type strains of other species of the genus pantoea. multilocus sequence analysis based on partial sequences of the gyrb, rpob, infb and atpd genes also reveale ... | 2015 | 26297578 |
| re: randomized clinical trial of brewed green and black tea in men with prostate cancer prior to prostatectomy. | 2015 | 26292860 | |
| coffee prevents proximal colorectal adenomas in japanese men: a prospective cohort study. | this prospective cohort study aimed to show that coffee prevents the recurrence of colorectal tumors (adenomas, precursors of colorectal cancer, and early-stage colorectal cancers) as well as colorectal cancer. the present study included 307 patients who participated in a clinical study that required endoscopy to remove a colorectal tumor. the amount of coffee consumed by the patients at study inclusion and the frequency of colorectal tumors, as detected by colonoscopy over the subsequent 4 year ... | 2016 | 26291025 |
| a study on quality components and sleep-promoting effects of gaba black tea. | the aims of this study were to analyze the changes in quality components of gamma (γ)-aminobutyric acid (gaba) black tea during processing, and to investigate the effect of three dosages of gaba black tea on sleep improvement. the results showed that the gaba content was increased significantly up to 2.70 mg g(-1) after vacuum anaerobic and aerobic treatment. in addition, the content of gaba after drying reached 2.34 mg g(-1), which achieved the standard of gaba tea. during the entire processing ... | 2015 | 26290415 |
| effect of brewing duration on the antioxidant and hepatoprotective abilities of tea phenolic and alkaloid compounds in a t-bhp oxidative stress-induced rat hepatocyte model. | tea is an interesting source of antioxidants capable of counteracting the oxidative stress implicated in liver diseases. we investigated the impact of antioxidant molecules provided by a mixture of teas' leaves (green, oolong, pu-erh) after different infusion durations in the prevention of oxidative stress in isolated rat hepatocytes, by comparison with pure epigallocatechin-3-gallate (egcg), the main representative of tea catechins. dried aqueous tea extracts (ate) obtained after 5, 15 and 30 m ... | 2015 | 26287152 |
| natural products of relevance in the prevention and supportive treatment of depression. | the use of herbs or their parts: leaves, roots, rhizomes, flowers, seeds, natural strains, as well as extracts or isolated metabolites is becoming more and more popular. natural remedies not only act prophylactically, but also help to alleviate symptoms of many diseases and enhance the overall functioning of the internal organs. many raw materials of natural origin plays a role in treatment of health problems, and also in case of serious diseases such as depression. depression (affective disorde ... | 2016 | 26276913 |
| chronic black tea extract consumption improves endothelial function in ovariectomized rats. | menopause escalates the risk of cardiovascular diseases in women. there is an unmet need for better treatment strategy for estrogen-deficiency-related cardiovascular complications. here we investigated the impact of chronic black tea extract (bt) consumption on cardiovascular function and lipid metabolism using a rat model of estrogen deficiency. | 2016 | 26276555 |
| molecular cloning and characterization of spermine synthesis gene associated with cold tolerance in tea plant (camellia sinensis). | spermine synthase (spms, ec 2.5.1.22), enzyme of spermine (spm) biosynthesis, has been shown to be related to stress response. in this study, attempts were made to clone and characterize a gene encoding spms from tea plant (camellia sinensis). the effect of exogenous application of spm in c. sinensis subjected to low-temperature stress was also investigated. a full-length spms complementary dna (cdna) (csspms) with an open reading frame of 1113 bp was cloned using reverse transcription-pcr and r ... | 2015 | 26276446 |
| effects of green tea (camellia sinensis) mouthwash containing 1% tannin on dental plaque and chronic gingivitis: a double-blinded, randomized, controlled trial. | the aim of the present study was to explore the effects of iranian green tea mouthwash containing 1% tannin on dental plaque and chronic gingivitis. | 2017 | 26272266 |
| tea and flavonoid intake predict osteoporotic fracture risk in elderly australian women: a prospective study. | observational studies have linked tea drinking, a major source of dietary flavonoids, with higher bone density. however, there is a paucity of prospective studies examining the association of tea drinking and flavonoid intake with fracture risk. | 2015 | 26269364 |
| transcriptomic and phytochemical analysis of the biosynthesis of characteristic constituents in tea (camellia sinensis) compared with oil tea (camellia oleifera). | tea plants (camellia sinensis) are used to produce one of the most important beverages worldwide. the nutritional value and healthful properties of tea are closely related to the large amounts of three major characteristic constituents including polyphenols (mainly catechins), theanine and caffeine. although oil tea (camellia oleifera) belongs to the genus camellia, this plant lacks these three characteristic constituents. comparative analysis of tea and oil tea via rna-seq would help uncover th ... | 2015 | 26245644 |
| africa's oesophageal cancer corridor: do hot beverages contribute? | hot beverage consumption has been linked to oesophageal squamous cell cancer (ec), but its contribution to the poorly understood east african ec corridor is not known. | 2015 | 26245249 |
| comparing the antiplaque efficacy of 0.5% camellia sinensis extract, 0.05% sodium fluoride, and 0.2% chlorhexidine gluconate mouthwash in children. | dental caries is a multifactorial disease which requires a susceptible host, a cariogenic microflora, and a suitable substrate that must be present for a sufficient length of time. tea is prepared by the infusion of dried leaves of the tea plant, camellia sinensis, which contains bioactive compounds like polyphenols, flavonoids, and catechins that are thought to be responsible for the health benefits that have traditionally been attributed to tea. these compounds have multidimensional effects su ... | 2017 | 26236682 |
| thearubigins protect against acetaminophen-induced hepatic and renal injury in mice: biochemical, histopathological, immunohistochemical, and flow cytometry study. | acetaminophen toxicity is used as a model for studying chemical toxicity. n-acetylcysteine (nac) is used for the treatment of hepatotoxicity; however, there is no specific therapy for nephrotoxicity. | 2016 | 26234406 |
| transcriptome-based discovery of ap2/erf transcription factors related to temperature stress in tea plant (camellia sinensis). | tea plant (camellia sinensis) is an important natural resource for the global supply of non-alcoholic beverage production. the extension of tea plant cultivation is challenged by biotic and abiotic stresses. transcription factors (tfs) of the apetala 2 (ap2)/ethylene-responsive factor (erf) family are involved in growth and anti-stresses through multifaceted transcriptional regulation in plants. this study comprehensively analyzed ap2/erf family tfs from c. sinensis on the basis of the transcrip ... | 2015 | 26233577 |
| extraction kinetics of phytochemicals and antioxidant activity during black tea (camellia sinensis l.) brewing. | tea is the most consumed beverage in the world which is second only to water. tea contains a broad spectrum of active ingredients which are responsible for its health benefits. the composition of constituents extracted to the tea brew depends on the method of preparation for its consumption. the objective of this study was to investigate the extraction kinetics of phenolic compounds, gallic acid, caffeine and catechins and the variation of antioxidant activity with time after tea brew is made. | 2015 | 26226943 |
| global transcriptome and gene regulation network for secondary metabolite biosynthesis of tea plant (camellia sinensis). | major secondary metabolites, including flavonoids, caffeine, and theanine, are important components of tea products and are closely related to the taste, flavor, and health benefits of tea. secondary metabolite biosynthesis in camellia sinensis is differentially regulated in different tissues during growth and development. until now, little was known about the expression patterns of genes involved in secondary metabolic pathways or their regulatory mechanisms. this study aimed to generate expres ... | 2015 | 26220550 |
| codon usage bias analysis for the spermidine synthase gene from camellia sinensis (l.) o. kuntze. | the spermidine synthase (spds) gene exists widely in all types of plants. in this paper, the codon usage of the spds gene from camellia sinensis (csspds) was analyzed. the results showed that the codon usage of the csspds gene is biased towards the t-ended or a-ended codons, which is similar to that observed in 73 genes selected from the c. sinensis genome. an enc-plot for 15 spds genes from various plant species suggested that mutational bias was the major factor in shaping codon usage in these ... | 2015 | 26214415 |
| does enzymatic hydrolysis of glycosidically bound volatile compounds really contribute to the formation of volatile compounds during the oolong tea manufacturing process? | it was generally thought that aroma of oolong tea resulted from hydrolysis of glycosidically bound volatiles (gbvs). in this study, most gbvs showed no reduction during the oolong tea manufacturing process. β-glycosidases either at protein or gene level were not activated during the manufacturing process. subcellular localization of β-primeverosidase provided evidence that β-primeverosidase was located in the leaf cell wall. the cell wall remained intact during the enzyme-active manufacturing pr ... | 2015 | 26212085 |
| identification and quantification of 1,3-dimethylbutylamine (dmba) from camellia sinensis tea leaves and dietary supplements. | 1,3-dimethylbutylamine (dmba), is a cns stimulant, which has recently been identified in multiple dietary supplements and sometimes labeled as a natural constituent of pouchung tea. dmba is an homologue of 1,3-dimethylamylamine (dmaa) which the us food and drug administration has attempted to remove from all dietary supplements after dmaa consumption was linked to strokes, heart disease, and sudden death. to address questions concerning the natural origin of dmba, three independent analytical me ... | 2015 | 26209774 |
| determinations for pesticides on black, green, oolong, and white teas by gas chromatography triple-quadrupole mass spectrometry. | black, green, white, and oolong teas, all derived from leaves of camellia sinensis, are widely consumed throughout the world and represent a significant part of the beverages consumed by americans. a gas chromatography-triple quadrupole-based method, previously validated for pesticides on dried botanical dietary supplements, including green tea, was used to measure pesticides fortified into black and green teas at 10, 25, 100, and 500 μg/kg. teas from 18 vendors of tea products were then surveye ... | 2015 | 26209005 |
| tea consumption and mortality of all cancers, cvd and all causes: a meta-analysis of eighteen prospective cohort studies. | epidemiological studies have demonstrated inconsistent associations between tea consumption and mortality of all cancers, cvd and all causes. to obtain quantitative overall estimates, we conducted a dose-response meta-analysis of prospective cohort studies. a literature search in pubmed and embase up to april 2015 was conducted for all relevant papers published. random-effects models were used to calculate pooled relative risks (rr) with 95 % ci. in eighteen prospective studies, there were 12 22 ... | 2015 | 26202661 |
| purple tea and its extract suppress diet-induced fat accumulation in mice and human subjects by inhibiting fat absorption and enhancing hepatic carnitine palmitoyltransferase expression. | a number of clinical trials have been completed using green tea and black tea to investigate their effect in controlling weight in overweight adults. the results of these investigations, however, have often been contradictory, with some trials reporting positive effects of tea supplementation and some trials reporting no effect. as a result, the use of these teas for weight loss is controversial. purple tea is a variety of green tea developed in kenya (called trfk306), which in addition to certa ... | 2015 | 26199579 |
| separation of polyphenols and caffeine from the acetone extract of fermented tea leaves (camellia sinensis) using high-performance countercurrent chromatography. | leaves from camellia sienensis are a popular natural source of various beverage worldwide, and contain caffeine and polyphenols derived from catechin analogues. in the current study, caffeine (caf, 1) and three tea polyphenols including (-)-epigallocatechin 3-o-gallate (egcg, 2), (-)-gallocatechin 3-o-gallate (gcg, 3), and (-)-epicatechin 3-o-gallate (ecg, 4) were isolated and purified by flow-rate gradient high-performance countercurrent chromatography (hpccc) using a two-phase solvent system c ... | 2015 | 26197310 |
| effects of cinnamon, cardamom, saffron, and ginger consumption on markers of glycemic control, lipid profile, oxidative stress, and inflammation in type 2 diabetes patients. | type 2 diabetes (t2d) may be caused by elevated oxidative stress, inflammation, and hyperglycemia. the phytochemicals in several herbal medicines are reported to effectively improve diabetes and to ameliorate diabetic complications. the aim of the present study was to determine the effects of cinnamon, cardamom, saffron, and ginger as supplementary remedies in t2d. | 2015 | 26177486 |
| neuroprotective properties of the standardized extract from camellia sinensis (green tea) and its main bioactive components, epicatechin and epigallocatechin gallate, in the 6-ohda model of parkinson's disease. | camellia sinensis (green tea) is largely consumed, mainly in asia. it possesses several biological effects such as antioxidant and anti-inflammatory properties. the objectives were to investigate the neuroprotective actions of the standardized extract (cs), epicatechin (ec) and epigallocatechin gallate (egcg), on a model of parkinson's disease. male wistar rats were divided into so (sham-operated controls), untreated 6-ohda-lesioned and 6-ohda-lesioned treated for 2 weeks with cs (25, 50, or 100 ... | 2015 | 26167188 |
| synergistic anticancer activity of biologicals from green and black tea on du 145 human prostate cancer cells. | there is considerable interest in the potential of botanicals in preventing and/or alleviating chronic ailments. among the most studied botanicals are compounds present in green and black teas. nontoxic tea polyphenols are potent antioxidants, and they also modulate several signalling pathways and inhibit proteins such as mmp-9 or protein plasminogen activator system, making them very attractive potential therapeutics. one criticism of the prophylactic or therapeutic use of green or black tea po ... | 2015 | 26155176 |
| effects of green tea on escherichia coli as a uropathogen. | escherichia coli is the most common cause of urinary tract infections. the development of antibiotic resistance in e. coli is an important problem. finding alternative antimicrobial agents from plant extracts has received growing interest. camellia sinensis is a safe, nontoxic, cheap beverage that has been reported to have antimicrobial effects against various pathogenic bacteria including e. coli. polyphenolic components of green tea ( lǜ chá) have antibacterial activity. catechins also have sy ... | 2015 | 26151004 |
| green tea yogurt: major phenolic compounds and microbial growth. | the purpose of this study was to evaluate fermentation of milk in the presence of green tea (camellia sinensis) with respect to changes in antioxidant activity, phenolic compounds and the growth of lactic acid bacteria. pasteurized full fat cow's milk and starter culture were incubated at 41 °c in the presence of two different types of green tea extracts. the yogurts formed were refrigerated (4 °c) for further analysis. the total phenolic content was highest (p < 0.05) in air-dried green tea-yog ... | 2015 | 26139940 |