Publications
| Title | Abstract | Year Filter | PMID(sorted ascending) Filter |
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| adverse effects of plant food supplements and plants consumed as food: results from the poisons centres-based plantlibra study. | plant food supplements (pfs) are products of increasing popularity and wide-spread distribution. nevertheless, information about their risks is limited. to fill this gap, a poisons centres-based study was performed as part of the eu project plantlibra. multicentre retrospective review of data from selected european and brazilian poisons centres, involving human cases of adverse effects due to plants consumed as food or as ingredients of food supplements recorded between 2006 and 2010. ten poison ... | 2016 | 26948409 |
| genetic divergence between camellia sinensis and its wild relatives revealed via genome-wide snps from rad sequencing. | tea is one of the most popular beverages across the world and is made exclusively from cultivars of camellia sinensis. many wild relatives of the genus camellia that are closely related to c. sinensis are native to southwest china. in this study, we first identified the distinct genetic divergence between c. sinensis and its wild relatives and provided a glimpse into the artificial selection of tea plants at a genome-wide level by analyzing 15,444 genomic snps that were identified from 18 cultiv ... | 2016 | 26962860 |
| [rapid and dynamic determination models of amino acids and catechins concentrations during the processing procedures of keemun black tea]. | tea is one of the most popular beverages in the world. for the contribution to the taste and healthy functions of tea, amino acids and catechins are important components. among different kinds of black teas in the world, keemun black tea has the famous and specific fragrance, "keemun aroma". during the processing procedure of keemun black tea, the contents of amino acids and catechins changed greatly, and the differences of these concentrations during processing varied significantly. however, a ... | 2015 | 26964222 |
| quantitative analysis of major phytochemicals in orthodox tea (camellia sinensis), oxidized under compressed air environment. | this study describes major changes in phytochemical composition of orthodox tea (camellia sinensis var. assamica) oxidized under compressed air (ca). the experiments for oxidation were conducted under air pressure (101, 202, and 303 kpa) for 150 min. relative change in the concentrations of caffeine, catechins, theaflavins (tf), and thearubigins (tr) were analyzed. effect of ca pressure was found to be nonsignificant in regulating caffeine concentration during oxidation. but degradation in diffe ... | 2016 | 26970442 |
| potential of food and natural products to promote endothelial and vascular health. | endothelial dysfunction is now well established as a pivotal early event in the development of major cardiovascular diseases including hypertension, atherosclerosis, and diabetes. the alteration of the endothelial function is often triggered by an imbalance between the endothelial formation of vasoprotective factors including nitric oxide (no) and endothelium-dependent hyperpolarization, and an increased level of oxidative stress involving several prooxidant enzymes such as nadph oxidase and, of ... | 2016 | 26974893 |
| recent advances in volatiles of teas. | volatile compounds are important components of tea aroma, a key attribute of sensory quality. the present review examines the formation of aromatic volatiles of various kinds of teas and factors influencing the formation of tea volatiles, including tea cultivar, growing environment and agronomic practices, processing method and storage of tea. the determination of tea volatiles and the relationship of active-aroma volatiles with the sensory qualities of tea are also discussed in the present pape ... | 2016 | 26978340 |
| understanding the molecular mechanisms of cancer prevention by dietary phytochemicals: from experimental models to clinical trials. | chemoprevention is one of the cancer prevention approaches wherein natural/synthetic agent(s) are prescribed with the aim to delay or disrupt multiple pathways and processes involved at multiple steps, i.e., initiation, promotion, and progression of cancer. amongst environmental chemopreventive compounds, diet/beverage-derived components are under evaluation, because of their long history of exposure to humans, high tolerability, low toxicity, and reported biological activities. this compilation ... | 2016 | 26981198 |
| antioxidant and antifungal activities of camellia sinensis (l.) kuntze leaves obtained by different forms of production. | the antioxidant and anticandidal activities of leaves obtained from camellia sinensis by non-fermentation (green and white teas), semi-fermentation (red tea) and fermentation method (black tea) were investigated. it was evaluated the total phenolic content by folin-ciocalteau assay; antioxidant capacities were evaluated in vitro using dpph and abts radicals, hypochlorous acid and superoxide anion scavenger assays, induced hemolysis, lipid peroxidation by conjugated diene formation and myeloperox ... | 2016 | 26983085 |
| cssad: a fatty acid desaturase gene involved in abiotic resistance in camellia sinensis (l.). | tea (camellia sinensis l.) is a thermophilic evergreen woody plant that has poor cold tolerance. the sad gene plays a key role in regulating fatty acid synthesis and membrane lipid fluidity in response to temperature change. in this study, full-length sad cdna was cloned from tea leaves using rapid amplification of cdna ends and polymerase chain reaction (pcr)-based methods. sequence analysis demonstrated that cssad had a high similarity to other corresponding cdnas. at 25°c, the cssad transcrip ... | 2016 | 26985937 |
| evaluation of safety and antioxidant activity of yellow tea (camellia sinensis) extract for application in food. | the article presents an evaluation of the safety of yellow tea (camellia sinensis) extract consumption and its antioxidant activity in an animal model. wistar rats were exposed through diet to 2, 6, and 10 g yellow tea extract/kg feed for 90 days. no signs of toxicity and no differences in mean body weight gain in the treated and control rats were recorded throughout the experiment. no statistically significant differences in hematology findings and clinical chemistry parameters were observed be ... | 2016 | 26987026 |
| contents and compositions of policosanols in green tea (camellia sinensis) leaves. | policosanol (pc) is a mixture of health promoting bioactive long-chain aliphatic alcohols. here, we report that green tea (camellia sinensis) leaves are the exceptionally rich plant-sources of pc. young and tender leaves and old and turf leaves of c. sinensis were hand-picked in spring and autumn. the total contents of pc in the leaves were in the range of 726.2-1363.6mg/kg as determined by a gc-ms/ms. the compositions of pc in the leaves were different with harvest season and types. the total c ... | 2016 | 26988480 |
| lc-dad-esi-ms/ms characterization of phenolic constituents in turkish black tea: effect of infusion time and temperature. | the influence of different infusion times and temperatures on phenolic, antioxidant, and color properties of black teas (camellia sinensis l.) was investigated in the present study. the teas were prepared using infusion times of 3, 6, and 10min at 80 and 100°c. liquid chromatography coupled to diode array detection and electrospray ionization tandem mass spectrometry (lc-dad-esi-ms/ms), whereby the two purine alkaloids were detected using positive esi, and the other 33 phenolic compounds were de ... | 2016 | 26988497 |
| optical dental whitening efficacy of blue covarine toothpaste in teeth stained by different colors. | evaluate the immediate and cumulative optical whitening efficacy of a blue covarine toothpaste. | 2016 | 26990460 |
| rapid and direct volatile compound profiling of black and green teas (camellia sinensis) from different countries with ptr-tof-ms. | volatile profiles of 63 black and 38 green teas from different countries were analysed with proton transfer reaction-time of flight-mass spectrometry (ptr-tof-ms) both for tea leaves and tea infusion. the headspace volatile fingerprints were collected and the tea classes and geographical origins were tracked with pattern recognition techniques. the high mass resolution achieved by tof mass analyser provided determination of sum formula and tentative identifications of the mass peaks. the results ... | 2016 | 26992494 |
| investigation of free amino acid, total phenolics, antioxidant activity and purine alkaloids to assess the health properties of non-camellia tea. | to find novel functional beverages from folk teas, 33 species of frequently used non-camellia tea (plants other than camellia) were collected and compared with camellia tea (green tea, pu-erh tea and black tea) for the first time. data are reported here on the quantities of 20 free amino acids (faas) and three purine alkaloids (measured by uhplc), total polyphenols (measured by folin-ciocalteu assay), and antioxidant activity (dpph). the total amounts of faas in non-camellia tea (0.62-18.99 mg/g ... | 2016 | 27006902 |
| principles of biomedical agriculture applied to the plant family theaceae to identify novel interventions for cancer prevention and control. | plant materials from the family theaceae have been used for over a thousand years as integral components within the food systems of many globally distributed cultures and to treat a variety of human ailments. these markedly different uses remain of considerable interest in the 21st century. this perspective draws heavily from the agricultural and biomedical literature published using plant materials from the genus camellia. our objective is to provide a rationale and framework for broadening the ... | 2016 | 27011038 |
| theanine and caffeine content of infusions prepared from commercial tea samples. | caffeine and l-theanine are pharmacologically important constituents of tea, especially due to their effects on the central nervous system. the effects of these two compounds are opposite: while caffeine is a well-known stimulant, theanine has a relaxing effect. tea processing may influence the caffeine and theanine content of tea leaves. | 2017 | 27019564 |
| dual mechanisms regulating glutamate decarboxylases and accumulation of gamma-aminobutyric acid in tea (camellia sinensis) leaves exposed to multiple stresses. | γ-aminobutyric acid (gaba) is one of the major inhibitory neurotransmitters in the central nervous system. it has multiple positive effects on mammalian physiology and is an important bioactive component of tea (camellia sinensis). gaba generally occurs at a very low level in plants but gaba content increases substantially after exposure to a range of stresses, especially oxygen-deficiency. during processing of tea leaves, a combination of anoxic stress and mechanical damage are essential for th ... | 2016 | 27021285 |
| three new oxidation products produced from epigallocatechin-3- o-gallate and epicatechin-3-o-gallate. | during chemical studies on uncharacterized black tea polyphenols, the enzymatic oxidation of a mixture of epigallocatechin-3-o-gallate (1) and epicatechin-3-o-gallate (2) was examined, and three new dimeric products together with six known catechin dimers were isolated. two of the new compounds have tricyclo[5.2.2.0²,⁶]undecane and tricyclo[5.2.1.0²,⁶]decane carboxyl structures generated by oxidative coupling between two pyrogallol-b-rings of 1. another new product was a dimer connected by a c-c ... | 2016 | 27032198 |
| (-)-epigallocatechin gallate inhibits asymmetric dimethylarginine-induced injury in human brain microvascular endothelial cells. | (-)-epigallocatechin gallate (egcg) is the main polyphenol component of green tea (leaves of the camellia sinensis plant). egcg has been reported to protect human brain microvascular endothelial cells (hbmecs) against injury in several models. however, the exact mechanism is still unclear. in the current study we found that egcg protected against asymmetric dimethylarginine (adma)-induced hbmec injury, and inhibited adma-induced reactive oxygen species production and malondialdehyde expression. ... | 2016 | 27038929 |
| review of scientific evidence of medicinal convoy plants in traditional persian medicine. | one concept used in traditional persian medicine (tpm) for multidrug therapy is that of the convoy drug (mobadregh). according to tpm texts, convoy drugs are substances (or drugs), which facilitate the access of drugs or foods to the whole body or to specific organs. this study reviewed some convoy drugs presented in tpm, their biological effects, and their probable interactions with main drugs, considering the increased absorption through inhibition of p-glycoprotein (p-gp) efflux function, bio ... | 2017 | 27041871 |
| assessment of aquo-ethanolic extract of camellia sinensis against carbapenem resistant escherichia coli: in vivo trials in a murine model. | the prevalence of carbapenem resistant escherichia coli (cre) has increased considerably during the last decade, which can be ascribed to relative scarcity of effective non toxic antimicrobial agents. the present study was conducted to evaluate the antimicrobial activity of aquo-ethanolic (1:1) extract of leaves of camellia sinensis (ptrc-31911-a) against carbapenem resistant escherichia coli at preclinical level using peritonitis infection model in sprague dawley rats. efficacy analysis of ptrc ... | 2016 | 27044838 |
| de novo sequencing of the leaf transcriptome reveals complex light-responsive regulatory networks in camellia sinensis cv. baijiguan. | tea plants (camellia sinensis l.) possess high genetic diversity that is important for breeding. one cultivar, baijiguan, exhibits a yellow leaf phenotype, reduced chlorophyll (chl) content, and aberrant chloroplast structures under high light intensity. in contrast, under low light intensity, the flush shoot from baijiguan becomes green, the chl content increases significantly, and the chloroplasts exhibit normal structures. to understand the underlying molecular mechanisms for these observatio ... | 2016 | 27047513 |
| anti-hemolytic, hemagglutination inhibition and bacterial membrane disruptive properties of selected herbal extracts attenuate virulence of carbapenem resistant escherichia coli. | expression of a multitude of virulence factors by multi-drug resistant microbial strains, e.g., carbapenem resistant escherichia coli (family: enterobacteriaceae; class: gammaproteobacteria), is responsible for resistance against beta-lactam antibiotics. hemolysin production and induction of hemagglutination by bacterial surface receptors inflicts direct cytotoxicity by destroying host phagocytic and epithelial cells. we have previously reported that berberis aristata, camellia sinensis, cyperus ... | 2016 | 27057673 |
| transcriptomic analysis reveals the molecular mechanisms of drought-stress-induced decreases in camellia sinensis leaf quality. | the tea plant [camellia sinensis (l.) o. kuntze] is an important commercial crop rich in bioactive ingredients, especially catechins, caffeine, theanine and other free amino acids, which the quality of tea leaves depends on. drought is the most important environmental stress affecting the yield and quality of this plant. in this study, the effects of drought stress on the phenotype, physiological characteristics and major bioactive ingredients accumulation of c. sinensis leaves were examined, an ... | 2016 | 27066035 |
| determination of some selected secondary metabolites and their invitro antioxidant activity in commercially available ethiopian tea (camellia sinensis). | eight brands of tea (camellia sinensis),which are cultivated and commercially available in ethiopian market, were analyzed for estimation of their total secondary metabolites (polyphenols, flavonoids and tannins) content and free radical scavenging activity which is expressed on dry weight basis. in this present study, the total polyphenols, tannin and flavonoid contents were studied spectrophotometrically using folin-dennis, folin-dennis/protein precipitation and aluminium chloride methods resp ... | 2016 | 27069832 |
| green tea (-)-epigallotocatechin-3-gallate induces pgc-1α gene expression in hepg2 cells and 3t3-l1 adipocytes. | green tea (camellia sinensis) is one of the most popular beverages in the world and has been acknowledged for centuries as having significant health benefits. (-)-epigallocatechin-3-gallate (egcg) is the most abundant catechin in green tea, and it has been reported to have health benefit effects. peroxisome proliferator-activated receptor γ coactivator (pgc)-1α is a crucial regulator of mitochondrial biogenesis and hepatic gluconeogenesis. the objective of this study was to investigate whether e ... | 2016 | 27069908 |
| effect of green tea (camellia sinensis l.) leaf extract on reproductive system of adult male albino rats. | green tea leaf extract (gtle), used in this experiment has shown great influence on male reproductive system functionally as well as morphologically. the extract was prepared according to the method of wei. h. et al. the extract was given to two different experimental animal groups with two different doses during 26 consecutive days. after treatment it was found that, the weight of the testis was markedly reduced instead of normal weight gain of all the animals. the sperm count and motility were ... | 2015 | 27073594 |
| exogenous abscisic acid significantly affects proteome in tea plant (camellia sinensis) exposed to drought stress. | tea [camellia sinensis (l.) o. kuntze] is an important economic crop, and drought is the most important abiotic stress affecting yield and quality. abscisic acid (aba) is an important phytohormone responsible for activating drought resistance. increased understanding of aba effects on tea plant under drought stress is essential to develop drought-tolerant tea genotypes, along with crop management practices that can mitigate drought stress. the objective of the present investigation is evaluation ... | 2014 | 27076915 |
| a comparative evaluation of antibacterial effectiveness of sodium hypochlorite, curcuma longa, and camellia sinensis as irrigating solutions on isolated anaerobic bacteria from infected primary teeth. | in endodontics, most of the commercial intra-canal medicaments have cytotoxic reactions and because of their inability to eliminate bacteria from dentinal tubules, recent medicine has turned its attention to the usage of biologic medication prepared from natural plants. the literature to testify the efficacy of natural alternatives in primary teeth is meagre and its effects as irrigating solutions need to be evaluated. | 2016 | 27080968 |
| theaflavin-3, 3'-digallate induces apoptosis and g2 cell cycle arrest through the akt/mdm2/p53 pathway in cisplatin-resistant ovarian cancer a2780/cp70 cells. | ovarian cancer is the most lethal gynecological cancer among women worldwide. adverse side effects and acquired resistance to conventional platinum based chemotherapy are major impediments in ovarian cancer treatment, and drive the development of more selective anticancer drugs that target cancer-specific defects. in this study, theaflavin-3, 3'-digallate (tf3), the major theaflavin monomer in black tea, exhibited a potent growth inhibitory effect on the cisplatin-resistant ovarian cancer a2780/ ... | 2016 | 27082635 |
| hypocholestrolic effect of spent black tea leaves replaced with wheat bran in broiler ration. | black tea leaves (camellia sinensis) have been known for many years in lowering cholesterol level. the purpose of the present study was to find the effects of spent black tea leaves as a substitute of wheat bran on cholesterol reduction in broiler chicks. for this purpose a total of hundred & fifty (150), day old broiler poultry chicks were purchased from the local market. the spent black tea leaves were collected from tea stalls. chicks were randomly distributed into 5 main groups according to ... | 2016 | 27087091 |
| differential transcriptome analysis of leaves of tea plant (camellia sinensis) provides comprehensive insights into the defense responses to ectropis oblique attack using rna-seq. | tea is a very popular and healthy nonalcoholic beverage worldwide. as an evergreen woody plant, the cultivation of tea plants (camellia sinensis) is challenged by biotic stresses, and one of which is feeding of ectropis oblique. in china, e. oblique infestation causes serious damages in many tea cultivation areas. tea plants have evolved sophisticated strategies to cope with attack by e. oblique. to elucidate the molecular mechanisms of the response to e. oblique in tea plants, the differential ... | 2016 | 27098524 |
| use of plant extracts for tea pest management in india. | india is the second largest producer of black tea in the world. the biggest challenge for tea growers of india nowadays is to combat pests and diseases. tea crop in india is infested by not less than 720 insect and mite species. at least four sucking pests and six chewing pests have well established themselves as regular pests causing substantial damage to this foliage crop. various synthetic pesticides are widely used for the management of tea pests in india. applications of such large quantity ... | 2016 | 27102124 |
| tea consumption is inversely associated with depressive symptoms in the elderly: a cross-sectional study in eastern china. | epidemiological studies suggest that higher tea consumption was associated with lower risk of depressive symptoms, but this has not been found consistently. moreover, the effect of different types of tea on depressive symptoms needs to be further explored. this study aimed to examine the association between tea consumption and depressive symptoms in chinese elderly. | 2016 | 27107254 |
| inhibition of streptococcus mutans biofilm formation using extracts from assam tea compared to green tea. | streptococcus mutans, a gram-positive oral bacterium, has been identified as one of the principal etiological agents of human dental caries. to clarify the nature of the difference anti-biofilm effect against s. mutans between assam tea from camellia sinensis var. assamica, partially fermented, and green tea from camellia sinensis, non-fermented, active agents from the teas were purified. | 2016 | 27107380 |
| fortification of alcoholic beverages (12% v/v) with tea (camellia sinensis) reduces harmful effects of alcohol ingestion and metabolism in mouse model. | an animal model was used to study the health benefits inherent in tea fortified alcoholic beverages fed to laboratory mice. | 2016 | 27110378 |
| the effect of dietary pigmentation on the esthetic appearance of clear orthodontic elastomeric modules. | to compare the stain resistance of three types of clear elastomeric modules exposed to several common dietary substances through the assessment of the perception of a group of dentists to discoloration using visual analog scale (vas). | 2017 | 27127754 |
| anticariogenic activity of black tea - an invivo study. | teas is known for its anticariogenic properties and various mechanisms have been invoked to explain this effect. one such proposed mechanism is inhibition of salivary alpha amylase activity by endogenous tannins present in tea. | 2016 | 27135007 |
| swapdt: a method for short-time withering assessment of probability for drought tolerance in camellia sinensis validated by targeted metabolomics. | climate change is causing droughts affecting crop production on a global scale. classical breeding and selection strategies for drought-tolerant cultivars will help prevent crop losses. plant breeders, for all crops, need a simple and reliable method to identify drought-tolerant cultivars, but such a method is missing. plant metabolism is often disrupted by abiotic stress conditions. to survive drought, plants reconfigure their metabolic pathways. studies have documented the importance of metabo ... | 2016 | 27137993 |
| the impact of theaflavins on systemic-and microcirculation alterations: the murine and randomized feasibility trials. | theaflavins are polyphenols found in black tea; their physiological activities were not well investigated. the present study in rats evaluated the influence of theaflavins on circulation. in addition, an intervention pilot study examined the influence of a theaflavin drink on postprandial hemodynamic change. in an animal study, a single oral dose of theaflavin rich fraction (tf, 10mg/kg) caused transient increase in mean blood pressure (mbp) and heart rate (hr). tf also elevated cremastric blood ... | 2016 | 27142743 |
| combined cytological and transcriptomic analysis reveals a nitric oxide signaling pathway involved in cold-inhibited camellia sinensis pollen tube growth. | nitric oxide (no) as a signaling molecule plays crucial roles in many abiotic stresses in plant development processes, including pollen tube growth. here, the signaling networks dominated by no during cold stress that inhibited camellia sinensis pollen tube growth are investigated in vitro. cytological analysis show that cold-induced no is involved in the inhibition of pollen tube growth along with disruption of the cytoplasmic ca(2+) gradient, increase in ros content, acidification of cytoplasm ... | 2016 | 27148289 |
| risk assessment of mineral and heavy metal content of selected tea products from the ghanaian market. | food consumption is the most likely route of human exposure to metals. tea (camellia sinensis l.) is among the most widely consumed non-alcoholic beverages. concentrations of heavy metals and minerals in tea from 15 different brands in kumasi, ghana were measured to assess the health risk associated with their consumption. the mineral and metal contents (fe, cu, zn, pb, as, cd) were analyzed using atomic absorption spectrophotometer (z-8100 polarized zeeman). the results revealed that the mean c ... | 2016 | 27154053 |
| switching to instant black coffee modulates sodium selenite-induced cataract in rats. | the influence of daily consumption of some common beverages on the development of cataract in rats was investigated. total phenol content was determined in the beverages and an oral standardized dose of total phenols from each beverage was given to the treated rats. weaned male albino rats were used and divided into five groups (n=7). rats were fed ain 93g and administered the standardized dose of instant coffee, black tea and hibiscus beverages for 30 days. on day 14 all rats were injected with ... | 2016 | 27158251 |
| black tea polyphenols and polysaccharides improve body composition, increase fecal fatty acid, and regulate fat metabolism in high-fat diet-induced obese rats. | with the current changes in diet and living habits, obesity has become a global health problem. thus, the weight-reducing function of tea has attracted considerable attention. this study investigated the anti-obesity effect and the mechanism of black tea (bt) polyphenols and polysaccharides in male sprague-dawley rats. the bt polyphenols and polysaccharides reduced the body weight, lee's index, visceral fat weight, and fat cell size but improved the biochemical profile and increased the fecal fa ... | 2016 | 27161951 |
| critical factors determining fluoride concentration in tea leaves produced from anhui province, china. | this study investigated the fluoride present in tea plants (camellia sinensis (l.) o. kuntze) and its relationship to soils, varieties, seasons and tea leaf maturity. the study also explored how different manufacturing processes affect the leaching of fluoride into tea beverages. the fluoride concentration in the tea leaves was significantly correlate to the concentration of water-soluble fluoride in the soil. different tea varieties accumulated different levels of fluoride, with varieties, anji ... | 2016 | 27162130 |
| levels of trace elements in black teas commercialized in saudi arabia using inductively coupled plasma mass spectrometry. | the present work has been demonstrated a developed method for the determination of mn, fe, co, ni, cu, zn, mo, cd, as, cr, pb, and v in different types of black teas collected from saudi arabia market using inductively coupled plasma mass spectrometry (icp-ms). each sample represents a well-mixed combination of ten packets from the same type collected from the market. detection limits in ng g(-1) were 76.06, 166.03, 5.94, 2.94, 18.29, 18.29, 9.00, 0.48, 0.48, 7.67, 3.07, and 4.21 for mn, fe, co, ... | 2016 | 27166629 |
| magnetic effervescent tablet-assisted ionic liquid dispersive liquid-liquid microextraction of selenium for speciation in foods and beverages. | a novel, simple and rapid method based on magnetic effervescent tablet-assisted ionic liquid dispersive liquid-liquid microextraction (mea-il-dllme) followed by graphite furnace atomic absorption spectrometry (gfaas) determination was established for the speciation of selenium in various food and beverage samples. in the procedure, a special magnetic effervescent tablet containing co2 sources (sodium carbonate and sodium dihydrogenphosphate), ionic liquids and fe3o4 magnetic nanoparticles (mnps) ... | 2016 | 27181611 |
| impact of flavonoid-rich black tea and beetroot juice on postprandial peripheral vascular resistance and glucose homeostasis in obese, insulin-resistant men: a randomized controlled trial. | insulin-stimulated muscle blood flow facilitates plasma glucose disposal after a meal, a mechanism that is impaired in obese, insulin-resistant volunteers. nitrate- or flavonoid-rich products, through their proposed effects on nitric oxide, may improve postprandial blood flow and, subsequently, glucose disposal. to investigate whether a single dose of nitrate-rich beetroot juice or flavonoid-rich black tea lowers postprandial muscle vascular resistance in obese volunteers and alters postprandial ... | 2016 | 27182277 |
| transcriptome analysis reveals self-incompatibility in the tea plant (camellia sinensis) might be under gametophytic control. | self-incompatibility (si) is under genetic control and prevents inbreeding depression in angiosperms. si mechanisms are quite complicated and still poorly understood in many plants. tea (camellia sinensis l.) belonging to the family of theaceae, exhibits high levels of si and high heterozygosity. uncovering the molecular basis of si of the tea plant may enhance breeding and simplify genomics research for the whole family. | 2016 | 27183979 |
| effect of catechins on fattening performance, meat quality, some antioxidant and blood parameters and fattening costs in japanese quail (coturnix coturnix japonica). | the aim of this study was to investigate the effect of dietary supplementation of green tea (camellia sinensis) catechins in quail (coturnix coturnix japonica). quail were fed with a basal diet, and the treatment groups were fed on the basal diet with 1.25 or 2.50 g/kg catechin supplementation for 30 d. fattening performance and meat quality of the quail were estimated. serum total antioxidant status (tas), plasma and liver malondialdehyde (mda) and some serum biochemical parameters were measure ... | 2016 | 27186659 |
| evaluation and quantitative analysis of different growth periods of herb-arbor intercropping systems using hplc and uv-vis methods coupled with chemometrics. | as a result of the pressure from population explosion, agricultural land resources require further protecting and rationally utilizing. intercropping technique has been widely applied for agricultural production to save cultivated area, improve crop quality, and promote agriculture economy. in this study, we employed high-performance liquid chromatography (hplc) and ultraviolet-visible spectroscopy (uv-vis) combined with chemometrics for determination and qualitative evaluation of several kinds ... | 2016 | 27193013 |
| high antiviral effects of hibiscus tea extract on the h5 subtypes of low and highly pathogenic avian influenza viruses. | viral neuraminidase inhibitors are widely used as synthetic anti-influenza drugs for the prevention and treatment of influenza. however, drug-resistant influenza a virus variants, including h5n1 highly pathogenic avian influenza viruses (hpaivs), have been reported. therefore, the discovery of novel and effective antiviral agents is warranted. we screened the antiviral effects of 11 herbal tea extracts (hibiscus, black tea, tencha, rosehip tea, burdock tea, green tea, jasmine tea, ginger tea, la ... | 2016 | 27193820 |
| nutrition transition in rural tanzania and kenya. | all three types of malnutrition - underweight, overweight and micronutrient deficiency - are experienced in countries undergoing a nutrition transition, and they can occur in parallel in one community or even one household. to combat this triple burden of malnutrition, a combination of different strategies will be necessary, including a focus on food-based strategies that promote the consumption of a wide range of foods across nutritionally distinct food groups. in addition to a literature revie ... | 2016 | 27198465 |
| traditional therapies used to manage diabetes and related complications in mauritius: a comparative ethnoreligious study. | religious communities from mauritius still rely on traditional therapies (tt) for primary healthcare. nonetheless, there is still a dearth of scientific information on tt used by the different religious groups to manage diabetes and related complications (drc). this study aimed to gather ethnomedicinal knowledge on tt used by the different religious groups against drc. diabetic patients (n = 95) and traditional healers (n = 5) were interviewed. fifty-two plant species belonging to 33 families an ... | 2016 | 27200100 |
| indications for three independent domestication events for the tea plant (camellia sinensis (l.) o. kuntze) and new insights into the origin of tea germplasm in china and india revealed by nuclear microsatellites. | tea is the world's most popular non-alcoholic beverage. china and india are known to be the largest tea producing countries and recognized as the centers for the domestication of the tea plant (camellia sinensis (l.) o. kuntze). however, molecular studies on the origin, domestication and relationships of the main teas, china type, assam type and cambod type are lacking. | 2016 | 27218820 |
| the effect of different beverages on the color and translucency of flowable composites. | this study examined the changes in color and translucency of flowable composites after immersion in different beverages. thirty composite samples were prepared from four flowable composites (g-aenial universal flo, filtek ultimate, esthelite flow quick, and clearfil majesty es flow) and a microhybrid composite (filtek z-250) and stored in distilled water at 37°c for 24 h. the samples were randomly divided into seven groups and then immersed in different beverages (red bull, coffee, black tea, pe ... | 2016 | 27220904 |
| anti-cancer effects of green tea by either anti- or pro- oxidative mechanisms. | tea derived from the leaves and buds of camellia sinensis (theaceae) is consumed worldwide. green tea contains various components with specific health-promoting effects, and is believed to exert protective effects against diseases including cancer, diabetes and hepatitis, as well as obesity. of the various tea components, the polyphenol catechins have been the subject of extensive investigation and among the catechins, (-)-epigallocatechin gallate has the strongest bioactivity in most cases. our ... | 2016 | 27221834 |
| theaflavin synthesized in a selective, domino-type, one-pot enzymatic biotransformation method with camellia sinensis cell culture inhibits weight gain and fat accumulation to high-fat diet-induced obese mice. | the polyphenolic compound theaflavin, which is the main red pigment present in black tea, is reported to elicit various physiological effects. because of the extremely low concentration of theaflavin present in black tea, its extraction from black tea leaves in quantities sufficient for use in medical studies has been difficult. we have developed a simple, inexpensive, selective, domino-type, one-pot enzymatic biotransformation method for the synthesis of theaflavin that is suitable for use in m ... | 2016 | 27237789 |
| association between dietary intake and bone mineral density in japanese postmenopausal women: the yokogoshi cohort study. | diet and food intake play an important role in the development of osteoporosis. however, apart from calcium and vitamin d, how nutrients affect bone status is not fully understood. the purpose of this study was to determine cross-sectional and longitudinal associations between dietary intake and bone mineral density (bmd) in japanese postmenopausal women. this 5-year cohort study included 600 community-dwelling women aged 55-74 years at baseline in 2005. information on demographics, nutrition, a ... | 2016 | 27238552 |
| selection and verification of candidate reference genes for mature microrna expression by quantitative rt-pcr in the tea plant (camellia sinensis). | quantitative reverse transcription-polymerase chain reaction (qrt-pcr) is a rapid and sensitive method for analyzing microrna (mirna) expression. however, accurate qrt-pcr results depend on the selection of reliable reference genes as internal positive controls. to date, few studies have identified reliable reference genes for differential expression analysis of mirnas among tissues, and among experimental conditions in plants. in this study, three mirnas and four non-coding small rnas (ncrna) w ... | 2016 | 27240406 |
| antimicrobial activity of tea catechin against canine oral bacteria and the functional mechanisms. | epigallocatechin gallate (egcg) is the major polyphenolic compound of green tea. polyphenolic compounds were extracted from the leaf of camellia sinensis (japanese green tea), and the minimum inhibitory concentration against canine oral bacteria was measured. subsequently, we investigated the inhibitory effects of polyphenolic compounds and egcg on the growth of canine oral bacteria. egcg showed antimicrobial activity against a model bacterium, streptococcus mutans. our results indicate that egc ... | 2016 | 27246281 |
| oolong tea made from tea plants from different locations in yunnan and fujian, china showed similar aroma but different taste characteristics. | consistent aroma characteristics are important for tea products. however, understanding the formation of tea aroma flavor and correspondingly proposing applicable protocols to control tea quality and consistency remain major challenges. oolong tea is one of the most popular teas with a distinct flavor. generally, oolong tea is processed with the leaves of tea trees belonging to different subspecies and grown in significantly different regions. in this study, yunnan and fujian oolong teas, green ... | 2016 | 27247873 |
| application of a nanostructured platform and imprinted sol-gel film for determination of chlorogenic acid in food samples. | chlorogenic acid (cga) is a polyphenol derivative that widely exists in higher plants like fruits, vegetables, black teas, and some traditional chinese medicines. in this work, we have proposed a sensitive and selective electrochemical sensor for detection of cga. the sensor was based on a glassy carbon electrode (gce) modified with a functional platform by grafting vinyltrimethoxysilane (vtms) in multi-walled carbon nanotubes (mwcnts) and covered by a molecularly imprinted siloxane (mis) film p ... | 2016 | 27260443 |
| formation of volatile tea constituent indole during the oolong tea manufacturing process. | indole is a characteristic volatile constituent in oolong tea. our previous study indicated that indole was mostly accumulated at the turn over stage of oolong tea manufacturing process. however, formation of indole in tea leaves remains unknown. in this study, one tryptophan synthase α-subunit (tsa) and three tryptophan synthase β-subunits (tsbs) from tea leaves were isolated, cloned, sequenced, and functionally characterized. combination of cstsa and cstsb2 recombinant protein produced in esch ... | 2016 | 27263428 |
| medicinal plants--prophylactic and therapeutic options for gastrointestinal and respiratory diseases in calves and piglets? a systematic review. | gastrointestinal and respiratory diseases in calves and piglets lead to significant economic losses in livestock husbandry. a high morbidity has been reported for diarrhea (calves ≤ 35%; piglets ≤ 50%) and for respiratory diseases (calves ≤ 80%; piglets ≤ 40%). despite a highly diverse etiology and pathophysiology of these diseases, treatment with antimicrobials is often the first-line therapy. multi-antimicrobial resistance in pathogens results in international accordance to strengthen the rese ... | 2016 | 27268043 |
| natural cures for breast cancer treatment. | for centuries, herbs and plants have been used for medicinal purposes and as food as well. this review concerns about different types of plants that retain the immune stimulating and anti-tumor properties. large variety of active phytochemicals such as carotenoids, flavonoids, ligands, polyphenolics, terpenoids, sulfides, lignans and plant sterols has been identified in different types of herbs. these phytochemicals have different mechanisms of action. they either stimulate the protective enzyme ... | 2016 | 27275107 |
| preparation of congou black tea from stale green tea. | 1992 | 27280839 | |
| inhibiting effect of browned processed foods on trypsin. | inhibition of proteases was examined in browned foods including soy pastes, soy sauces, fish sauce, sauces, teas, coffees, and others in association with melanoidin, a maillard product, which had been found to be a potent inhibitor of trypsin. most of the foods were effective in restraining trypsin activity based on hydrolysis of n-α-benzoyl-dl-arginine-p-nitroanilide, while being ineffective on chymotrypsin except for black tea and cola. especially, teas were noted for their strong inhibitory e ... | 1996 | 27281148 |
| small rna and degradome profiling reveals important roles for micrornas and their targets in tea plant response to drought stress. | tea (camellia sinensis) is a popular beverage worldwide. drought stress (ds) is a major constraint on the growth, yield and quality of tea plants. micrornas (mirnas) play important roles in plant responses to ds. we constructed eight small rna libraries from the drought-tolerant 'ningzhou 2' (nz2) and drought-susceptible 'zhuyeqi' (zyq) cultivars during four stages [control (ck), the fourth day of ds, the eighth day of ds and after recovery (rc)]. a total of 268 conserved and 62 novel mirnas wer ... | 2016 | 27282332 |
| antioxidative potential, nutritional value and sensory profiles of confectionery fortified with green and yellow tea leaves (camellia sinensis). | this paper presents a study on development of functional food products containing green and yellow tea leaves. the results indicated that green and yellow tea are significant tools in the creation of the nutritional value, antioxidative potential and stability of the lipid fraction of cookies. tea-fortified cookies showed considerably higher contents of dietary fiber, especially hemicellulose and insoluble fractions, and were characterized by significantly higher antioxidant potential associated ... | 2016 | 27283654 |
| the occurrence and distribution of tuckerella japonica (acari: tuckerellidae) on tea bushes, camellia sinensis and c. assamica, in alabama, georgia and south carolina, usa. | adults, immatures and eggs of tuckerella japonica (ehara) were collected from unknown clones or varieties of camellia sinensis (l.) o. kuntze tea bushes in the clemson university farm, coastal research and education center, charleston, south carolina; from assam hybrids in the caw caw nature preserve in ravenel, sc; from c. sinensis and c. assamica (masters) in the charleston tea plantation on wadmalaw island, sc; c. sinensis in the fairhope tea plantation in fairhope, alabama; and from c. sinen ... | 2016 | 27294360 |
| black hairy tongue with a fixed dose combination of olanzapine and fluoxetine. | black hairy tongue (bht) is a benign disease characterized by elongated filiform lingual papillae, with a carpet-like appearance of the dorsum of the tongue. it is has been reported to occur with a prevalence ranging from 0.6% to 11.3%. although its etiology is not fully understood, bht may be triggered by smoking, excessive coffee or black tea drinking, poor oral hygiene, trigeminal neuralgia, general debilitation, dry mouth as well as certain drugs. we present here a case of a patient with psy ... | 2017 | 27298505 |
| subcellular localization of galloylated catechins in tea plants [camellia sinensis (l.) o. kuntze] assessed via immunohistochemistry. | galloylated catechins, as the main secondary metabolites in the tea plant, including (-)-epigallocatechin-3-gallate and (-)-epicatechin-3-gallate, comprise approximately three-quarters of all the tea plant catechins and have stronger effects than non-galloylated catechins, both on the product quality in tea processing and the pharmacological efficacy to human beings. the subcellular localization of galloylated catechins has been the primary focus of studies that assess biosynthesis and physiolog ... | 2016 | 27303422 |
| the prevalence of dental fluorosis and its associated factors in salem district. | there are various regions in india that have high levels of fluoride in drinking water sources. many people residing in such places suffer from dental fluorosis (df). | 2017 | 27307668 |
| inhibition of salivary amylase by black tea in high-caries and low-caries index children: a comparative in vivo study. | dental caries is a universal disease. dietary modification is important in reducing the occurrence of dental caries. tea which is so frequently consumed with cariogenic starch rich food is proposed to have anticariogenic potential. the various mechanism has been proposed for same and one being inhibition of salivary amylase activity. | 2017 | 27313414 |
| thesis abstract fermented milk elaborated with camellia sinensis. | this study aimed to develop and to characterize fermented dairy beverage formulated with camellia sinensis. the infusion was elaborated with the addiction of dehydrated leaves of c. sinensis in whey (1g/100g) which added in sweetened milk (10% sucrose w/w) coagulated by streptococcus salivarius subspecies thermophilus and lactobacillus delbrueckii subspecies bulgaricus in proportions of 10, 20, 30 and 40% (v/w). the control treatment consisted of yogurt added with sucrose (10% w/w). analysis wer ... | 2016 | 27323046 |
| development of caps markers to identify indian tea (camellia sinensis) clones with high catechin content. | tea leaves are rich in plant secondary phenolics, especially flavonoids. catechins are considered to be the most valuable flavonoids, and the catechin content in tea is an important trait for determining its quality. we have developed cleaved amplified polymorphic sequence (caps)-based markers for evaluating total catechin content that target two important secondary metabolite pathway genes, pal (phenylalanine ammonia-lyase) and chs (chalcone synthase). catechin content levels in the tea samples ... | 2016 | 27323162 |
| fermented rice bran prevents atopic dermatitis in dncb-treated nc/nga mice. | the fermentation of natural plants has a favorable effect on the functional and biological activities of living systems. these include anti-oxidative, anti-inflammatory, and anti-platelet aggregation activities. this is attributed to the chemical conversion of the parent plants to functional constituents, which show more potent biological activity. in our study, rice bran along with oriental medicinal plants (angelicae gigantis, cnidium officinale, artemisia princeps, and camellia sinensis) was ... | 2016 | 27323667 |
| the effect of black tea (camellia sinensis (l) kuntze) on pediatrics with acute nonbacterial diarrhea: a randomized controlled trial. | we aimed to evaluate the antidiarrheal effect of black tea in pediatric patients with acute nonbacterial diarrhea. this single-blind randomized clinical trial study was performed on 2 to 12-year-old patients, with acceptable criteria for acute nonbacterial diarrhea in shiraz, iran. in total, 120 patients took part in this study. blocked randomization method was used to allocate them into 2 groups of intervention (black tea tablet + standard treatment) and control group (standard treatment; 60 pa ... | 2017 | 27324724 |
| heavy metal content in tea soils and their distribution in different parts of tea plants, camellia sinensis (l). o. kuntze. | soils contaminated with heavy metals may pose a threat to environment and human health if metals enter the food chain over and above threshold levels. in general, there is a lack of information on the presence of heavy metals in tea [camellia sinensis (l). o. kuntze] plants and the soils in which they are grown. therefore, an attempt was made to establish a database on the important heavy metals: cadmium (cd), chromium (cr), nickel (ni), and lead (pb). for an initial survey on heavy metals, soil ... | 2016 | 27334344 |
| the microbiome and metabolites in fermented pu-erh tea as revealed by high-throughput sequencing and quantitative multiplex metabolite analysis. | pu-erh is a tea produced in yunnan, china by microbial fermentation of fresh camellia sinensis leaves by two processes, the traditional raw fermentation and the faster, ripened fermentation. we characterized fungal and bacterial communities in leaves and both pu-erhs by high-throughput, rdna-amplicon sequencing and we characterized the profile of bioactive extrolite mycotoxins in pu-erh teas by quantitative liquid chromatography-tandem mass spectrometry. we identified 390 fungal and 629 bacteria ... | 2016 | 27337135 |
| comparative assessment of copper, iron, and zinc contents in selected indian (assam) and south african (thohoyandou) tea (camellia sinensis l.) samples and their infusion: a quest for health risks to consumer. | the current study aims to assess the infusion pattern of three important micronutrients namely copper (cu), iron (fe), and zinc (zn) contents from black tea samples produced in assam (india) and thohoyandou (south africa). average daily intakes and hazardous quotient were reported for these micronutrients. total content for cu, fe, and zn varied from 2.25 to 48.82 mg kg(-1), 14.75 to 148.18 mg kg(-1), and 28.48 to 106.68 mg kg(-1), respectively. the average contents of each of the three micronut ... | 2017 | 27339254 |
| anti-plaque effect of a synergistic combination of green tea and salvadora persica l. against primary colonizers of dental plaque. | green tea (gt), leafs of camellia sinensis var. assamica, is widely consumed as healthy beverage since thousands of years in asian countries. chewing sticks (miswak) of salvadora persica l. (sp) are traditionally used as natural brush to ensure oral health in developing countries. both gt and sp extracts were reported to have anti-bacterial activity against many dental plaque bacteria. however, their combination has never been tested to have anti-bacterial and anti-adherence effect against prima ... | 2016 | 27343694 |
| metals content in herbal supplements. | obesity has become an international epidemic. to evaluate the level of metals in extracts of plants prescribed as weight loss supplements, different brands containing camellia sinensis (l.) kuntze, citrus aurantium l., cordia ecalyculata vell, ilex paraguariensis a. st.-hil, cissus quadrangularis l., senna alexandrina mill were purchased in local market, hot acid digested, and analyzed while metal content by inductively coupled plasma optical emission spectrometry, icp-oes. quality assurance and ... | 2017 | 27344673 |
| tea flavonoids for bone health: from animals to humans. | osteoporosis is a skeletal disease characterized by a deterioration of bone mass and bone quality that predisposes an individual to a higher risk of fragility fractures. emerging evidence has shown that the risk for low bone mass and osteoporosis-related fractures can be reduced by nutritional approaches aiming to improve bone microstructure, bone mineral density, and strength. tea and its flavonoids, especially those of black tea and green tea, have been suggested to protect against bone loss a ... | 2016 | 27356546 |
| gene expression analysis of bud and leaf color in tea. | purple shoot tea attributing to the high anthocyanin accumulation is of great interest for its wide health benefits. to better understand potential mechanisms involved in purple buds and leaves formation in tea plants, we performed transcriptome analysis of six green or purple shoot tea individuals from a f1 population using the illumina sequencing method. totally 292 million rna-seq reads were obtained and assembled into 112,233 unigenes, with an average length of 759 bp and an n50 of 1081 bp. ... | 2016 | 27362295 |
| genetic variation of flavonols quercetin, myricetin, and kaempferol in the sri lankan tea (camellia sinensis l.) and their health-promoting aspects. | flavonol glycosides in tea leaves have been quantified as aglycones, quercetin, myricetin, and kaempferol. occurrence of the said compounds was reported in fruits and vegetable for a long time in association with the antioxidant potential. however, data on flavonols in tea were scanty and, hence, this study aims to envisage the flavonol content in a representative pool of accessions present in the sri lankan tea germplasm. significant amounts of myricetin, quercetin, and kaempferol have been det ... | 2016 | 27366737 |
| butenolide derivatives from the plant endophytic fungus aspergillus terreus. | three new butenolides containing 5-hydroxyfuran-2(5h)-one core, asperteretal a (1), asperteretal b (2), and asperteretal c (3), together with seven known butenolides (4-10), were obtained from an endophytic fungus aspergillus terreus pr-p-2 isolated from the plant camellia sinensis var. assamica. the structures of compounds 1-3 were elucidated on the basis of detailed spectroscopic analysis including uv, ir, hresims, 1d and 2d nmr, and ecd spectra. compounds 1, 3, 5 and 6-8 showed potent inhibit ... | 2016 | 27370101 |
| mineral and metabolic profiles in tea leaves and flowers during flower development. | tea [camellia sinensis (l.) o. kuntze] is one of the most popular non-alcoholic beverage crops in the world, and the physiological processes and gene regulations involved in development in tea plants have been well characterized. however, relatively little is known about the metabolic changes combined with mineral distributions that occur during flower development. here we detected the contents of 11 elements in tea leaves and flowers and found that, some of them, especially phosphorus, sulfur a ... | 2016 | 27372442 |
| green tea flavour determinants and their changes over manufacturing processes. | flavour determinants in tea infusions and their changes during manufacturing processes were studied using camellia sinensis cultivars 'bai-sang cha' ('bas') possessing significant floral scents and 'fuding-dabai cha' ('fud') with common green tea odour. metabolite profiling based on odour activity threshold revealed that 'bas' contained higher levels of the active odorants β-ionone, linalool and its two oxides, geraniol, epoxylinalool, decanal and taste determinant catechins than 'fud' (p<0.05). ... | 2016 | 27374591 |
| polymeric black tea polyphenols (pbps) inhibit benzo(a)pyrene and 4-(methylnitrosamino)-1-(3-pyridyl)-1- butanone-induced lung carcinogenesis potentially through down-regulation of p38 and akt phosphorylation in a/j mice. | the aim of our study was to evaluate chemopreventive efficacy and possible mechanism of most abundant polyphenolic fraction in black tea, polymeric black tea polyphenols (pbps), in experimental lung carcinogenesis model. effect of 1.5% black tea derived pbps on benzo(a)pyrene [b(a)p] and 4-(methylnitrosamino)-1-(3-pyridyl)-1-butanone (nnk) induced lung lesions were studied over 28 wks. chemopreventive efficacy was studied using decrease in tumor incidence and/or multiplicity and/or delay in the ... | 2017 | 27377358 |
| variations of rhizosphere bacterial communities in tea (camellia sinensis l.) continuous cropping soil by high-throughput pyrosequencing approach. | the goal was to investigate the dynamics of soil bacterial community in the chronosequence tea orchards. | 2016 | 27377624 |
| new biofunctional effects of the flower buds of camellia sinensis and its bioactive acylated oleanane-type triterpene oligoglycosides. | we review the biofunctional effects of the flower buds of camellia sinensis and c. sinensis var. assamica, such as antihyperlipidemic, antihyperglycemic, antiobesity, and gastroprotective effects in vivo, and antiallergic, pancreatic lipase inhibitory, and amyloid β (aβ) aggregation inhibitory activities in vitro. although the biofunctional effects of tea leaves have been extensively studied, less attention has been given to those of the flowers and seeds of the tea plant. our studies focused on ... | 2016 | 27380283 |
| developmental changes in carbon and nitrogen metabolism affect tea quality in different leaf position. | leaf position represents a specific developmental stage that influences both photosynthesis and respiration. however, the precise relationships between photosynthesis and respiration in different leaf position that affect tea quality are largely unknown. here, we show that the effective quantum yield of photosystem ii [φpsⅱ] as well as total chlorophyll concentration (tchl) of tea leaves increased gradually with leaf maturity. moreover, respiration rate (rr) together with total nitrogen concentr ... | 2016 | 27380366 |
| annotation of different dehydrocatechin oligomers by ms/ms and their occurrence in black tea. | dehydrocatechins (dhc's), oligomeric oxidation products of (epi)catechins, were formed in model incubations of epicatechin with mushroom tyrosinase. dhc oligomers up to tetramers were detected by reversed-phase ultrahigh-performance liquid chromatography mass spectrometry (rp-uhplc-ms) analysis. measurements with matrix-assisted laser desorption/ionization time-of-flight mass spectrometry (maldi-tof-ms) showed formation of oligomers up to at least 15 catechin subunits. isomeric dhc's were obtain ... | 2016 | 27380714 |
| isolation of an aroma precursor of benzaldehyde from tea leaves (camellia sinensis var. sinensis cv. yabukita). | the cyanoglycoside, prunasin, was isolated for the first time as an aroma precursor of benzaldehyde from fresh tea leaves (camellia sinensis var. sinensis cv. yabukita). prunasin was readily hydrolyzed by a crude enzyme prepared from the fresh tea leaves to liberate benzaldehyde. the isomerization of prunasin under neutral conditions was also recognized. | 1998 | 27385456 |
| green tea (camellia sinensis): chemistry and oral health. | green tea is a widely consumed beverage worldwide. numerous studies have suggested about the beneficial effects of green tea on oral conditions such as dental caries, periodontal diseases and halitosis. however, to date there have not been many review articles published that focus on beneficial effects of green tea on oral disease. the aim of this publication is to summarize the research conducted on the effects of green tea on oral cavity. green tea might help reduce the bacterial activity in t ... | 2016 | 27386001 |
| decreased biosynthesis of jasmonic acid via lipoxygenase pathway compromised caffeine-induced resistance to colletotrichum gloeosporioides under elevated co2 in tea seedlings. | caffeine, the major purine alkaloid in tea has long been known for its role in plant defense. however, its effect on colletotrichum gloeosporioides that causes brown blight disease in tea is largely unknown especially under elevated co2. here we show that elevated co2 reduced endogenous caffeine content in tea leaves, but sharply increased susceptibility of tea to c. gloeosporioides. the expression of c. gloeosporioides actin gene was gradually increased during the postinoculation period. in con ... | 2016 | 27392179 |
| identification of endogenous gibberellins in the leaves and xylem sap of tea plants. | endogenous gibberellins (gas) in the young leaves and xylem sap of tea plants (camellia sinensis l.) were analyzed by gc-ms. the following gas were identified by comparing their mass spectra and kris with those of authentic specimens: ga9 and ga20 in the leaves; ga9, ga12, ga15, ga20, ga44, ga51 and ga53 in the xylem sap. | 1999 | 27392877 |