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Ou T, Bao H, Zhou Y, Liu Z, Sui H, Yong L, Mao W, Wang Y, Bao H, Xiao X, Zhang L, Yang D, Jiang D, Li N, Wei S, Song Y. Concentration and health risk assessment of 16 rare earth elements in six types of tea in China. Food Chem Toxicol 2024; 190:114832. [PMID: 38908816 DOI: 10.1016/j.fct.2024.114832] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/10/2024] [Revised: 05/31/2024] [Accepted: 06/19/2024] [Indexed: 06/24/2024]
Abstract
Rare Earth Elements (REEs) have been implicated in potential health effects. However, the health risk of REE exposure among tea drinkers in China remains poorly understood. This study aimed to characterize the concentration of REEs in different tea categories and evaluate the associated health risks for tea consumers in China. By analyzing the content of 16 REEs in 4326 tea samples from China, the exposure level of REEs to the general population was estimated. The content of these 16 REEs was similar across six types of tea, with oolong tea exhibiting the highest levels. The concentration of light rare earth elements (LREEs) in six types of tea was higher than that of heavy rare earth elements (HREEs). The daily mean and 95th percentile (P95) exposure to REEs from tea for the general population in China were 0.0328 μg/kg BW and 0.1283 μg/kg BW, respectively, which are significantly lower than the temporary acceptable daily dose (tADI). Our findings suggest that REEs from tea do not pose a known health risk to Chinese consumers.
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Affiliation(s)
- Tong Ou
- Key Laboratory of Food Safety Risk Assessment, National Healthand Family Planning Commission of the People's Republic of China (China National Center for Food Safety Risk Assessment), Beijing, 100022, China
| | - Hanbing Bao
- Key Laboratory of Food Safety Risk Assessment, National Healthand Family Planning Commission of the People's Republic of China (China National Center for Food Safety Risk Assessment), Beijing, 100022, China; Department of Epidemiology and Biostatistics, Ministry of Education Key Lab of Environment and Health, School of Public Health, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, Hubei, China
| | - Yujing Zhou
- Department of Epidemiology and Biostatistics, Ministry of Education Key Lab of Environment and Health, School of Public Health, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, Hubei, China
| | - Zhaoping Liu
- Key Laboratory of Food Safety Risk Assessment, National Healthand Family Planning Commission of the People's Republic of China (China National Center for Food Safety Risk Assessment), Beijing, 100022, China
| | - Haixia Sui
- Key Laboratory of Food Safety Risk Assessment, National Healthand Family Planning Commission of the People's Republic of China (China National Center for Food Safety Risk Assessment), Beijing, 100022, China
| | - Ling Yong
- Key Laboratory of Food Safety Risk Assessment, National Healthand Family Planning Commission of the People's Republic of China (China National Center for Food Safety Risk Assessment), Beijing, 100022, China
| | - Weifeng Mao
- Key Laboratory of Food Safety Risk Assessment, National Healthand Family Planning Commission of the People's Republic of China (China National Center for Food Safety Risk Assessment), Beijing, 100022, China
| | - Yibaina Wang
- Key Laboratory of Food Safety Risk Assessment, National Healthand Family Planning Commission of the People's Republic of China (China National Center for Food Safety Risk Assessment), Beijing, 100022, China
| | - Huihui Bao
- Key Laboratory of Food Safety Risk Assessment, National Healthand Family Planning Commission of the People's Republic of China (China National Center for Food Safety Risk Assessment), Beijing, 100022, China
| | - Xiao Xiao
- Key Laboratory of Food Safety Risk Assessment, National Healthand Family Planning Commission of the People's Republic of China (China National Center for Food Safety Risk Assessment), Beijing, 100022, China
| | - Lei Zhang
- Key Laboratory of Food Safety Risk Assessment, National Healthand Family Planning Commission of the People's Republic of China (China National Center for Food Safety Risk Assessment), Beijing, 100022, China
| | - Dajin Yang
- Key Laboratory of Food Safety Risk Assessment, National Healthand Family Planning Commission of the People's Republic of China (China National Center for Food Safety Risk Assessment), Beijing, 100022, China
| | - Dingguo Jiang
- Key Laboratory of Food Safety Risk Assessment, National Healthand Family Planning Commission of the People's Republic of China (China National Center for Food Safety Risk Assessment), Beijing, 100022, China
| | - Ning Li
- Key Laboratory of Food Safety Risk Assessment, National Healthand Family Planning Commission of the People's Republic of China (China National Center for Food Safety Risk Assessment), Beijing, 100022, China
| | - Sheng Wei
- Department of Epidemiology and Biostatistics, Ministry of Education Key Lab of Environment and Health, School of Public Health, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, Hubei, China.
| | - Yan Song
- Key Laboratory of Food Safety Risk Assessment, National Healthand Family Planning Commission of the People's Republic of China (China National Center for Food Safety Risk Assessment), Beijing, 100022, China.
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Pavlovič A, Tavčar G, Ponikvar-Svet M. Fluoride and Aluminium in Tea ( Camellia sinensis L.)-Tea Quality Indicators and Risk Factors for Consumers. Molecules 2023; 28:6396. [PMID: 37687225 PMCID: PMC10490252 DOI: 10.3390/molecules28176396] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/16/2023] [Revised: 08/25/2023] [Accepted: 08/29/2023] [Indexed: 09/10/2023] Open
Abstract
In recent years, the quality and sourcing of tea have gained importance in Europe, but information remains scarce. The aim of this study was to determine the concentrations of fluoride (F-) and total aluminium (Al) species in infusions of commercially available teas in Slovenia, and thus in Europe, and to relate them to tea quality and their impact on consumer safety. F- concentrations were determined using a fluoride-ion-selective electrode and Al concentrations using inductively coupled plasma optical emission spectroscopy. A comparison of the results obtained for four selected tea samples using the calibration curve and a standard addition technique showed good agreement, with no interferences caused by the sample matrix. The concentrations of 35 commercial teas ranged from 0.34 to 4.79 and 0.51 to 8.90 mg/L for F- and Al, respectively. The average concentrations of the two elements followed the same descending order: black filter > green filter > black leaves ≈ green leaves. Single and multivariate statistical methods supported the categorisation of teas by packaging but not by type, with tea in filter bags being more expensive than loose tea. The linear relationship between F- and Al concentrations in infusions (C(Al) = 1.2134 · C(F-)) allows for the determination of one element and estimation of the other, leading to a significant reduction in laboratory effort and cost. This research advances tea assessment by proposing Al concentration alongside F- as a quality indicator and provides the basis for tea-monitoring protocols. Finally, the daily consumption of larger quantities of tea (≈1 L) with elevated F- and Al concentrations could potentially pose a health risk.
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Affiliation(s)
- Anja Pavlovič
- Department of Inorganic Chemistry and Technology, Jožef Stefan Institute, Jamova 39, SI-1000 Ljubljana, Slovenia;
- Jožef Stefan International Postgraduate School, Jamova 39, SI-1000 Ljubljana, Slovenia
| | - Gašper Tavčar
- Department of Inorganic Chemistry and Technology, Jožef Stefan Institute, Jamova 39, SI-1000 Ljubljana, Slovenia;
| | - Maja Ponikvar-Svet
- Department of Inorganic Chemistry and Technology, Jožef Stefan Institute, Jamova 39, SI-1000 Ljubljana, Slovenia;
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Lantzouraki DZ, Amerikanou C, Karavoltsos S, Kafourou V, Sakellari A, Tagkouli D, Zoumpoulakis P, Makris DP, Kalogeropoulos N, Kaliora AC. Artemisia arborescens and Artemisia inculta from Crete; Secondary Metabolites, Trace Metals and In Vitro Antioxidant Activities. Life (Basel) 2023; 13:1416. [PMID: 37374198 DOI: 10.3390/life13061416] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/17/2023] [Revised: 06/08/2023] [Accepted: 06/16/2023] [Indexed: 06/29/2023] Open
Abstract
BACKGROUND Currently, the use of medicinal plants has increased. Artemisia species have been used in several applications, including medicinal use and uses in cosmetics, foods and beverages. Artemisia arborescens L. and Artemisia inculta are part of the Mediterranean diet in the form of aqueous infusions. Herein, we aimed to compare the secondary metabolites of the decoctions and two different extracts (methanolic and aqueous-glycerolic) of these two species, as well as their antioxidant capacity and trace metal levels. METHODS Total phenolic, total flavonoid, total terpenes, total hydroxycinnamate, total flavonol, total anthocyanin contents and antioxidant/antiradical activity were determined, and GC/MS analysis was applied to identify and quantify phenolics and terpenoids. Trace metals were quantified with ICP-MS. RESULTS Aqueous-glycerolic extracts demonstrated higher levels of total secondary metabolites, greater antioxidant potential and higher terpenoid levels than decoctions and methanolic extracts. Subsequently, the aqueous-glycerolic extract of a particularly high phenolic content was further analyzed applying targeted LC-MS/MS as the most appropriate analytic tool for the determination of the phenolic profile. Overall, twenty-two metabolites were identified. The potential contribution of infusions consumption to metal intake was additionally evaluated, and did not exceed the recommended daily intake. CONCLUSIONS Our results support the use of these two species in several food, cosmetic or pharmaceutical applications.
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Affiliation(s)
- Dimitra Z Lantzouraki
- Institute of Chemical Biology, National Hellenic Research Foundation, 48 Vas. Constantinou Ave., 11635 Athens, Greece
| | - Charalampia Amerikanou
- Department of Nutrition and Dietetics, School of Health Science and Education, Harokopio University, 70 El. Venizelou Ave., 17676 Athens, Greece
| | - Sotirios Karavoltsos
- Laboratory of Environmental Chemistry, Department of Chemistry, National and Kapodistrian University of Athens, 15784 Athens, Greece
| | - Vasiliki Kafourou
- Department of Nutrition and Dietetics, School of Health Science and Education, Harokopio University, 70 El. Venizelou Ave., 17676 Athens, Greece
| | - Aikaterini Sakellari
- Laboratory of Environmental Chemistry, Department of Chemistry, National and Kapodistrian University of Athens, 15784 Athens, Greece
| | - Dimitra Tagkouli
- Department of Nutrition and Dietetics, School of Health Science and Education, Harokopio University, 70 El. Venizelou Ave., 17676 Athens, Greece
| | - Panagiotis Zoumpoulakis
- Department of Food Science and Technology, University of West Attica, Ag. Spyridonos, 12243 Egaleo, Greece
| | - Dimitris P Makris
- Department of Food Science & Nutrition, School of Agricultural Sciences, University of Thessaly, N. Temponera Street, 43100 Karditsa, Greece
| | - Nick Kalogeropoulos
- Department of Nutrition and Dietetics, School of Health Science and Education, Harokopio University, 70 El. Venizelou Ave., 17676 Athens, Greece
| | - Andriana C Kaliora
- Department of Nutrition and Dietetics, School of Health Science and Education, Harokopio University, 70 El. Venizelou Ave., 17676 Athens, Greece
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Dual-mode detection of fluorine-containing pesticides (bifenthrin, flufenoxuron, diflubenzuron) via ratiometric fluorescence and the Tyndall Effect of fluorescent organic nanoparticles. Food Chem 2023; 399:134008. [DOI: 10.1016/j.foodchem.2022.134008] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/17/2022] [Revised: 08/14/2022] [Accepted: 08/21/2022] [Indexed: 12/29/2022]
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Na Nagara V, Sarkar D, Luo Q, Biswas JK, Datta R. Health Risk Assessment of Exposure to Trace Elements from Drinking Black and Green Tea Marketed in Three Countries. Biol Trace Elem Res 2022; 200:2970-2982. [PMID: 34378169 DOI: 10.1007/s12011-021-02863-3] [Citation(s) in RCA: 11] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 05/20/2021] [Accepted: 07/30/2021] [Indexed: 12/07/2022]
Abstract
Although tea can be beneficial for our health, consuming excess trace elements in tea can be harmful. In this study, the carcinogenic and noncarcinogenic health risk for trace elements in tea influenced by the country of origin, tea type, and infusion process was assessed. Tea (Camellia sinensis) purchased from China, India, and the USA, including black and green tea, were analyzed for essential micronutrients (Cu, Se, and Zn) and nonessential trace elements (Ag, As, Ba, Cd, Cr, and Pb) in leaves and three types of infusions. The results showed that country of origin, tea type, and infusion process had a significant influence on the trace element contents in tea leaves and infusions, also on health risk. Country of origin had a significant influence on Ba, Cr, Pb, and Zn contents in tea leaves and on As, Ba, Cd, Cr, Pb, and Zn contents in tea infusions. Black tea had significantly higher (p < 0.05) Cr and Cu content in tea leaves than green tea, but only Cr content was significantly higher (p < 0.05) than that of green tea in tea infusion. The trace element contents were the highest in the first infusion and decreased as the number of infusion steps increased. The results showed that the consumption of tea infusion was not likely to cause noncarcinogenic risk. However, the carcinogenic risk for As was of concern. Our results indicate that avoiding drinking the first infusion can help to reduce both carcinogenic and noncarcinogenic health risks for trace elements.
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Affiliation(s)
- Viravid Na Nagara
- Department of Civil, Environmental and Ocean Engineering, Stevens Institute of Technology, Hoboken, NJ, 07030, USA
| | - Dibyendu Sarkar
- Department of Civil, Environmental and Ocean Engineering, Stevens Institute of Technology, Hoboken, NJ, 07030, USA.
| | - Qingzi Luo
- Department of Civil, Environmental and Ocean Engineering, Stevens Institute of Technology, Hoboken, NJ, 07030, USA
| | - Jayanta Kumar Biswas
- Department of Ecological Studies & International Centre for Ecological Engineering, University of Kalyani, Kalyani, West Bengal, India
| | - Rupali Datta
- Department of Biological Sciences, Michigan Technological University, Houghton, MI, USA
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Fiamegos Y, Papoci S, Dumitrascu C, Ghidotti M, Zdiniakova T, Ulberth F, de la Calle Guntiñas MB. Are the elemental fingerprints of organic and conventional food different? ED-XRF as screening technique. J Food Compost Anal 2021; 99:103854. [PMID: 34083873 PMCID: PMC8080890 DOI: 10.1016/j.jfca.2021.103854] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/17/2020] [Revised: 01/21/2021] [Accepted: 02/16/2021] [Indexed: 11/19/2022]
Abstract
Research has been conducted the last years to assess whether organically grown food is chemically different from produce of conventional agriculture and which markers are appropriate to discriminate between them. Most articles focus on one single food commodity, produced under strict controlled organic farming conditions, leaving open the question whether the difference would be seen when applied to the same commodity under different growing conditions. In this work 118 organic and 151 conventional samples of commercially available paprika powder, cinnamon, coffee, tea, chocolate, rice, wheat flour, cane sugar, coconut water, honey and bovine milk were characterised for their elemental composition using energy dispersive X-ray fluorescence. Resulting profiles were analysed using univariate and multivariate statistical techniques. Organic samples of a given commodity clustered together and were separated from their conventional counterparts. Differences in the elemental composition of food, could be used to develop statistical models for verifying the agronomical production system.
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Affiliation(s)
| | - Sergej Papoci
- European Commission, Joint Research Centre (JRC), Geel, Belgium
| | | | | | | | - Franz Ulberth
- European Commission, Joint Research Centre (JRC), Geel, Belgium
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In vitro assessment of major and trace element bioaccessibility in tea samples. Talanta 2021; 225:122083. [PMID: 33592795 DOI: 10.1016/j.talanta.2021.122083] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/29/2020] [Revised: 12/30/2020] [Accepted: 01/02/2021] [Indexed: 11/22/2022]
Abstract
Bioaccessibility of trace elements (Li, Be, Ti, Ga, Cu, Ag, Hg, Cd, Cs, Pt, Tl, Pb, As, Cr, Co, Ni, V, Se, Sn and Sb) and major elements (Rb, Ba, Al, Fe, Zn, Si, Ca, Mg, Mn, Mo, Sr, P and K) in tea infusions has been assessed using an in vitro dialyzability protocol. Gastric simulation (using pepsin solution) and intestinal simulation (using pancreatin and bile salts) were used to perform the in vitro digestion. ICP-MS, ICP-OES and FAES were used for elements determination in digested tea leaves, their infusions and the dialyzate fractions from tea infusions. Microwaves assisted acid digestion was used for the total element determination in tea leaves, while tea infusions were prepared by brewing tea leaves for 5 min in boiling water. The LODs for elements determined in tea leaves were in the range of 0.11-656 ng g-1 and 0.02-145.6 μg g-1 for trace and major elements, respectively. For elements' determination in tea infusions, the LODs were ranged between 0.23 and 399.9 ng L-1 for trace elements and 0.2-1248 μg L-1 for major elements. The LODs for the elements in the dialyzable fraction varied from 0.018 to 142 μg L-1. The accuracy of the total element determination was evaluated using certified reference materials (Tea Leaves INCT-TL-1 and Rye Grass). The analytical recoveries were also assessed for analyzed elements in digested tea leaves (95-114%) and their infusions (92-115%), showing good recoveries. Among the studied elements, K was the most abundant element in tea leaves and tea infusions in almost all samples, followed by Ca, Mg, and P. Zn, Cs, and K showed the highest dialyzability percentages up to 84%, 76%, and 54%, respectively, followed by Si and Ca and K that show moderate to high dialyzability percentages. The accuracy of the dialysis process was evaluated using a mass-balance study.
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8
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Mabuza N, Kinfe HH, Godeto TW, Ambushe AA. Estimated Contributions of Rooibos Tea to the Daily Manganese and Zinc Intakes Determined in Tea Leaves and Tea Infusions by Inductively Coupled Plasma-Mass Spectrometry. Biol Trace Elem Res 2021; 199:1145-1152. [PMID: 32557112 DOI: 10.1007/s12011-020-02211-x] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 04/22/2020] [Accepted: 05/19/2020] [Indexed: 01/13/2023]
Abstract
Rooibos tea, scientific name Aspalathus linearis, is a popular tea grown in South Africa and consumed worldwide for its unique taste and presumed health benefits. There is a growing interest in using rooibos tea as a supplement for the deficiency of metallic nutrients in South Africa. In this study, the total concentrations of manganese (Mn) and zinc (Zn) in acid-digested tea leaves and the corresponding tea infusions were determined by inductively coupled plasma-mass spectrometry (ICP-MS) to estimate the contribution of rooibos tea consumption to the recommended daily allowance (RDA) of Mn and Zn in consumers. The accuracy of microwave-assisted acid digestion and tea infusion methods were checked by analyzing INCT-TL-1 tea leaves certified reference material (CRM) and samples spiked with standards, respectively. Both methods yielded quantitative percentage recoveries for Mn and Zn. Rooibos tea leaves and the corresponding infusions are composed of higher levels of Mn than Zn where 40.9 to 85.7 μg Mn/g and 4.15 to 12.2 μg Zn/g were found in digested tea leaves and 11.8 to 30.2 μg Mn/g and 1.51 to 4.59 μg Zn/g in tea infusions. These results indicate the contribution of about 1.0 to 3.2% Mn and 0.03 to 0.08% Zn in males approximately ≥ 9 years of age and 1.3 to 3.8% Mn and 0.04 to 0.11% Zn in females of the same age group as males of the RDA from drinking a cup of tea obtained by infusing a 2-g bag of rooibos tea.
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Affiliation(s)
- Nombuzo Mabuza
- Research Centre for Synthesis and Catalysis, Department of Chemical Sciences, University of Johannesburg, P.O. Box 524, Auckland Park, 2006, South Africa
| | - Henok H Kinfe
- Research Centre for Synthesis and Catalysis, Department of Chemical Sciences, University of Johannesburg, P.O. Box 524, Auckland Park, 2006, South Africa
| | - Taddese W Godeto
- Research Centre for Synthesis and Catalysis, Department of Chemical Sciences, University of Johannesburg, P.O. Box 524, Auckland Park, 2006, South Africa
- Laboratory Services Branch, Ministry of the Environment, Conservation and Parks, M9P3V6, Toronto, ON, Canada
| | - Abayneh A Ambushe
- Research Centre for Synthesis and Catalysis, Department of Chemical Sciences, University of Johannesburg, P.O. Box 524, Auckland Park, 2006, South Africa.
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Saebi A, Minaei S, Mahdavian AR, Ebadi MT. Precision Harvesting of Medicinal Plants: Elements and Ash Content of Hyssop (Hyssopus officinalis L.) as Affected by Harvest Height. Biol Trace Elem Res 2021; 199:753-762. [PMID: 32394355 DOI: 10.1007/s12011-020-02171-2] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 01/23/2020] [Accepted: 04/24/2020] [Indexed: 11/30/2022]
Abstract
To investigate the effect of harvest height on the amassed elements and ash content of Hyssop (Hyssopus officinalis L.), an experiment was conducted in a randomized complete block design with three replications. Treatments included four harvest heights, i.e., 15, 25, 35, and 45 cm (from the tip of the plant) and the residual stalks. The dependent variables were the amassed content of elements N, K, P, Ca, Mg, Cu, Zn, and Pb in different heights of the plant and the associated ash content (total ash (TA), acid-insoluble ash (AA), and water-insoluble ash (WA)). The results showed that by moving from the upper shoots toward the ground, the amassed content of Mg, Ca, Cu, Zn, and Pb increased by 22.67%, 43.74%, 12.87%, 39.02%, and 85.04%, respectively. Further, a downward trend was observed for N (50.16%) and K (6.41%) content, while an upward trend reported for P (29.06%) content. As for the residual stalks, by moving from the upper shoots toward the ground, Mg, Ca, Cu, Zn, and Pb contents decreased by 1.01%, 21.03%, 9.11%, 17.02%, and 51.06%, respectively, while N and P contents increased by 60.59% and 3.15%, respectively, and a 34.74% increase was seen in P content. With increasing harvest height, TA, AA, and WA values increased by 33.48%, 27.03%, and 18.25%, respectively. As for the residues, these variables increased by 11.44%, 6.35%, and 5.22%, respectively. Our results showed that 15 cm harvest height had the highest quality with the lowest heavy metal content. Graphical Abstract.
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Affiliation(s)
- Ali Saebi
- Biosystems Engineering Department, Faculty of Agriculture, Tarbiat Modares University, Tehran, Iran
| | - Saeid Minaei
- Biosystems Engineering Department, Faculty of Agriculture, Tarbiat Modares University, Tehran, Iran.
| | - Ali Reza Mahdavian
- Biosystems Engineering Department, Faculty of Agriculture, Tarbiat Modares University, Tehran, Iran
| | - Mohammad-Taghi Ebadi
- Department of Horticultural Science, Faculty of Agriculture, Tarbiat Modares University, Tehran, Iran
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Tran T, Grandvalet C, Verdier F, Martin A, Alexandre H, Tourdot‐Maréchal R. Microbiological and technological parameters impacting the chemical composition and sensory quality of kombucha. Compr Rev Food Sci Food Saf 2020; 19:2050-2070. [DOI: 10.1111/1541-4337.12574] [Citation(s) in RCA: 25] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/07/2020] [Revised: 04/17/2020] [Accepted: 04/21/2020] [Indexed: 12/16/2022]
Affiliation(s)
- Thierry Tran
- UMR Procédés Alimentaires et Microbiologiques, Université de Bourgogne Franche‐Comté/AgroSup DijonÉquipe Vin Alimentation Micro‐organismes Stress (VAlMiS) Institut Universitaire de la Vigne et du Vin Jules Guyot 2 rue Claude Ladrey Dijon 21000 France
| | - Cosette Grandvalet
- UMR Procédés Alimentaires et Microbiologiques, Université de Bourgogne Franche‐Comté/AgroSup DijonÉquipe Vin Alimentation Micro‐organismes Stress (VAlMiS) Institut Universitaire de la Vigne et du Vin Jules Guyot 2 rue Claude Ladrey Dijon 21000 France
| | | | | | - Hervé Alexandre
- UMR Procédés Alimentaires et Microbiologiques, Université de Bourgogne Franche‐Comté/AgroSup DijonÉquipe Vin Alimentation Micro‐organismes Stress (VAlMiS) Institut Universitaire de la Vigne et du Vin Jules Guyot 2 rue Claude Ladrey Dijon 21000 France
| | - Raphaëlle Tourdot‐Maréchal
- UMR Procédés Alimentaires et Microbiologiques, Université de Bourgogne Franche‐Comté/AgroSup DijonÉquipe Vin Alimentation Micro‐organismes Stress (VAlMiS) Institut Universitaire de la Vigne et du Vin Jules Guyot 2 rue Claude Ladrey Dijon 21000 France
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Chen Y, Chen Q, Wang X, Sun F, Fan Y, Liu X, Li H, Deng Z. Hemostatic action of lotus leaf charcoal is probably due to transformation of flavonol aglycons from flavonol glycosides in traditional Chinses medicine. JOURNAL OF ETHNOPHARMACOLOGY 2020; 249:112364. [PMID: 31678413 DOI: 10.1016/j.jep.2019.112364] [Citation(s) in RCA: 12] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/18/2019] [Revised: 10/09/2019] [Accepted: 10/27/2019] [Indexed: 06/10/2023]
Abstract
ETHNOPHARMACOLOGICAL RELEVANCE Nelumbo nucifera Gaertn (lotus) leaves were empirically carbonized to enhance the hemostatic effect in traditional Chinese medicines. The mechanism of this application remains unclear. AIM OF THE STUDY The present study aims at exploring the transformation of phytochemical compounds in lotus leaves after heating and figuring out the phytochemical mechanism of the application of charcoal hemostatic styptics. METHODS AND RESULTS Raw lotus leaves were heated at 150 °C and 220 °C, respectively, and the transformation of the phytochemicals was studied. Flavonol glycosides in raw lotus leaves were found to be degraded to their corresponding aglycons in 150 °C lotus leaf charcoals (LLC) and the subsequent degradation products of aglycons in 220 °C LLC. 150 °C LLC exhibited the most desirable hemostatic effect in mice on reducing both bleeding time (BT) and clotting time (CT) by more than 30% as compared to the untreated group (P < 0.05). The extracts of 150 °C LLC were further separated by using different solvents. Ethyl acetate fraction which contained much flavonol aglycons displayed the most desirable hemostatic effect. On the contrary, petroleum ether fraction contains poor flavonoid and much alkaloid thus prolonged BT and CT. N-butanol extracts which contained only flavonol glycoside failed to shorten CT. In rats, quercetin (aglycon) standard promoted blood coagulation by shortening APTT (activated partial thromboplastin time) and increasing fibrinogen (P < 0.05). Hyperoside (glycoside) increased fibrinogen and platelet count (P < 0.05). Nuciferine was shown to prolong APTT and TT (thrombin time) and decrease fibrinogen (P > 0.05). CONCLUSION Degradation of flavonoids and alkaloids in lotus leaves was suggested to enhance the hemostatic effect of LLC. Flavonol aglycons were found to be more effective on blood clotting compared with their corresponding glycosides. Nuciferine, a typical alkaloid in lotus leaves which was degraded in LLC showed anticoagulation effect in rats. The content of flavonoid aglycon can be regarded as a criterion to qualify LLC.
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Affiliation(s)
- Yuhuan Chen
- State Key Laboratory of Food Science and Technology and School of Food Science, Nanchang University, Nanchang, 330047, Jiangxi Province, China
| | - Qiwen Chen
- Department of Pediatrics, The First Affiliated Hospital of Nanchang University, Nanchang, 330006, Jiangxi Province, China
| | - Xiaozhong Wang
- Department of Clinical Laboratory Science, The Second Affiliated Hospital of Nanchang University, Nanchang, 330006, Jiangxi Province, China
| | - Fan Sun
- Department of Clinical Laboratory Science, The Second Affiliated Hospital of Nanchang University, Nanchang, 330006, Jiangxi Province, China
| | - Yawei Fan
- State Key Laboratory of Food Science and Technology and School of Food Science, Nanchang University, Nanchang, 330047, Jiangxi Province, China
| | - Xiaoru Liu
- State Key Laboratory of Food Science and Technology and School of Food Science, Nanchang University, Nanchang, 330047, Jiangxi Province, China
| | - Hongyan Li
- State Key Laboratory of Food Science and Technology and School of Food Science, Nanchang University, Nanchang, 330047, Jiangxi Province, China
| | - Zeyuan Deng
- State Key Laboratory of Food Science and Technology and School of Food Science, Nanchang University, Nanchang, 330047, Jiangxi Province, China.
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12
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Guan C, Yang Y. Research of extraction behavior of heavy metal Cd in tea based on backpropagation neural network. Food Sci Nutr 2020; 8:1067-1074. [PMID: 32148815 PMCID: PMC7020285 DOI: 10.1002/fsn3.1392] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/03/2019] [Revised: 11/18/2019] [Accepted: 12/03/2019] [Indexed: 12/02/2022] Open
Abstract
In order to meet the increasing demand for food and beverage safety and quality, this study focused on the application of a back propagation (BP) neural network to determine the leaching rate of heavy metal in tea to improve the scientific health of tea drinking. The evaluation index and target expectations have been determined based on the extraction experiment of heavy metal Cd in tea soaking, with 3 evaluation index values taken as input layer parameters and the heavy metal extraction rate taken as output layer parameter. Then, employ the sample data standardized by min-max linearization method to train and test the network model and get the satisfactory results, which showed that the constructed BP neural network expressed a fast convergence speed and the systematic error was as low as 0.0003509. Additionally, there was no significance between Cd leaching rate of experimental results and neural network model results by reliability testing with a correlation coefficient was .9895. These results revealed that the network model established possessed an outstanding training accuracy and generalization performance, which effectively reflected the extraction rate of heavy metal in tea soaking and improved the safety of tea drinking.
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Affiliation(s)
| | - Yue Yang
- Yangjiang PolytechnicYangjiangChina
- Guangdong Provincial Key Laboratory of Atmospheric environment and Pollution ControlSouth China University of TechnologyGuangzhouChina
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13
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Pohl P, Szymczycha-Madeja A, Welna M. Direct ICP-OES multielement analysis of infused black and green teas and chemical fractionation of selected essential and non-essential elements prior to evaluation of their bioavailability and classification of teas by pattern recognition. ARAB J CHEM 2020. [DOI: 10.1016/j.arabjc.2018.02.013] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/11/2023] Open
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14
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Contrasting allocation of magnesium, calcium and manganese in leaves of tea (Camellia sinensis (L.) Kuntze) plants may explain their different extraction efficiency into tea. Food Chem Toxicol 2020; 135:110974. [DOI: 10.1016/j.fct.2019.110974] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/20/2019] [Revised: 11/11/2019] [Accepted: 11/13/2019] [Indexed: 11/23/2022]
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15
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Samuel-Nakamura C, Hodge FS. Occurrence and Risk of Metal(loid)s in Thelesperma megapotamicum Tea Plant. PLANTS (BASEL, SWITZERLAND) 2019; 9:E21. [PMID: 31877937 PMCID: PMC7020170 DOI: 10.3390/plants9010021] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 11/02/2019] [Revised: 11/22/2019] [Accepted: 11/29/2019] [Indexed: 12/02/2022]
Abstract
This study reports on the harvesting, ingestion, and contamination of American Indian tea Thelesperma megapotamicum grown on the Navajo Reservation in New Mexico. Uranium (U) and co-metal(loid)s (As, Cd, Cs, Mo, Pb, Se, Th, and V) have contaminated local soil and plants. Tea plants were gathered for analysis near U mining impacted areas. The study collected samples of wild tea plants (n = 14), roots (n = 14), and soil (n = 12) that were analyzed with inductively coupled plasma mass spectrometry. Tea harvesting activities, behavior, and ingestion information were collected via questionnaires. Harvesting took place in community fields and near roadways. Results indicate edible foliage concentration levels for Cd exceeded the World Health Organization (WHO) raw medicinal plant permissible level guidelines. Tea samples collected near high traffic areas had significantly greater Cd and Mo concentrations than those collected near low traffic areas (p < 0.001). Tea sample metal(loid) concentration levels ranged from 0.019-7.916 mg/kg. When compared to established food guidelines including the WHO provisional tolerable weekly intake (PTWI), reference dietary intake, recommended dietary allowance, and the tolerable upper limit (UL), Cd exceeded the WHO guidelines but none exceeded the PTWI nor the UL. These findings warrant improved standardization and establishment of universal guidelines for metal(loid) intake in food.
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Affiliation(s)
- Christine Samuel-Nakamura
- School of Nursing, University of California, Los Angeles (UCLA), 4-246 Factor Bldg., Mailcode 691821, Los Angeles, CA 90095, USA
| | - Felicia S. Hodge
- School of Public Health, UCLA, 5-940 Factor Bldg., Mailcode 691921, Los Angeles, CA 90095, USA;
- School of Nursing, UCLA, 5-940 Factor Bldg., Mailcode 691921, Los Angeles, CA 90095, USA
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16
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Pourramezani F, Akrami Mohajeri F, Salmani MH, Dehghani Tafti A, Khalili Sadrabad E. Evaluation of heavy metal concentration in imported black tea in Iran and consumer risk assessments. Food Sci Nutr 2019; 7:4021-4026. [PMID: 31890182 PMCID: PMC6924297 DOI: 10.1002/fsn3.1267] [Citation(s) in RCA: 20] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/28/2019] [Revised: 08/04/2019] [Accepted: 08/25/2019] [Indexed: 11/15/2022] Open
Abstract
Tea grows in the contaminated soils, absorbs the heavy metals, and enters them into the human food chain. The concentrations of Pb, Cd, Cu, As, and Hg of the imported black tea leaves to Hormozgan Province were evaluated by atomic absorption spectrometer. Then, the Hazard Quotient (HQ) and Hazard Index (HI) levels of heavy metal intakes were calculated to estimate the health hazard for consumers. The Pb, Cd, Cu, As, and Hg concentrations in the Sri Lankan and Indian blank tea were 0.14, 0.017, 11.29, 0.057, 0.0076 mg/kg, and 0.21, 0.02, 14.56, 0.067, 0.01 mg/kg, respectively. It was found that except for As concentration in Indian black tea were higher than Sri Lankan black tea. The HQ and HI levels of all studied metals were less than one, but they were higher in Indian black tea compared with the Sri Lankan black tea. The HI of Indian and Sri Lankan black tea samples were 0.061 and 0.048, respectively, which indicated no significant health hazard for tea consumers. The results showed that the consumption of the studied tea could not have any risk of heavy metal exposure.
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Affiliation(s)
- Fatemeh Pourramezani
- Zoonotic Diseases Research CenterDepartment of Food Hygiene and SafetySchool of Public HealthShahid Sadoughi University of Medical SciencesYazdIran
| | - Fateme Akrami Mohajeri
- Zoonotic Diseases Research CenterDepartment of Food Hygiene and SafetySchool of Public HealthShahid Sadoughi University of Medical SciencesYazdIran
| | - Mohammad Hossein Salmani
- Department of Environmental Health EngineeringSchool of Public HealthShahid Sadoughi University of Medical SciencesYazdIran
| | - Arefe Dehghani Tafti
- Department of BiostatisticsSchool of Public HealthShahid Sadoughi University of Medical SciencesYazdIran
| | - Elham Khalili Sadrabad
- Zoonotic Diseases Research CenterDepartment of Food Hygiene and SafetySchool of Public HealthShahid Sadoughi University of Medical SciencesYazdIran
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17
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Sun J, Hu G, Liu K, Yu R, Lu Q, Zhang Y. Potential exposure to metals and health risks of metal intake from Tieguanyin tea production in Anxi, China. ENVIRONMENTAL GEOCHEMISTRY AND HEALTH 2019; 41:1291-1302. [PMID: 30415396 DOI: 10.1007/s10653-018-0212-y] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/03/2018] [Accepted: 10/30/2018] [Indexed: 05/21/2023]
Abstract
The metal content of Tieguanyin tea from Anxi, Southeast China, was studied. Leaching experiments were designed based on the local tea-drinking habits, and tea infusions were prepared using three types of water and two methods of soaking tea. Twelve metals (Cd, As, Cr, Pb, Se, Sb, Ag, Tl, Cu, Zn, Be, and Ba) were measured by inductively coupled plasma mass spectrometry (ICP-MS), and a human health risk assessment was performed. The results showed that the quality of water used for steeping tea has a direct effect on the leaching concentrations of metals in the tea infusion and this effect can be reduced by using pure water or commercially available drinking water. Further, the two tea-soaking methods used by local residents can reduce the metal intake. The health risk assessment determined that the carcinogenic risk values of Cr, As, and Pb (Cr > Pb > As) were within an acceptable range (10-7-10-4); therefore, the concentrations of these metals in tea infusions do not pose substantial carcinogenic risk to tea drinkers. The results also indicate that the high concentrations of Tl in the tea infusions pose a substantial noncarcinogenic risk and may result from the dissolution characteristics of Tl and the water quality.
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Affiliation(s)
- Jingwei Sun
- College of Chemical Engineering, Huaqiao University, Xiamen, 361021, China
- School of Resources and Environmental Science, Quanzhou Normal University, Quanzhou, 362000, China
- Fujian Provincial Key Laboratory of Ecology-Toxicological Effects & Control for Emerging Contaminants, Putian, 351100, China
- Key Laboratory of Marine Biogenetic Resources, The Third Institute of Oceanography, State of Oceanic Administration, Xiamen, 361021, China
| | - Gongren Hu
- College of Chemical Engineering, Huaqiao University, Xiamen, 361021, China.
| | - Kangkang Liu
- School of Resources and Environmental Science, Quanzhou Normal University, Quanzhou, 362000, China
| | - Ruilian Yu
- College of Chemical Engineering, Huaqiao University, Xiamen, 361021, China
| | - Qiuyan Lu
- Fujian Center for Disease Control & Prevention, Fuzhou, 350000, China
| | - Yunfeng Zhang
- College of Chemical Engineering, Huaqiao University, Xiamen, 361021, China.
- School of Resources and Environmental Science, Quanzhou Normal University, Quanzhou, 362000, China.
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18
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Li MY, Xiao Y, Zhong K, Bai JR, Wu YP, Zhang JQ, Gao H. Characteristics and chemical compositions of Pingwu Fuzhuan brick-tea, a distinctive post-fermentation tea in Sichuan province of China. INTERNATIONAL JOURNAL OF FOOD PROPERTIES 2019. [DOI: 10.1080/10942912.2019.1614951] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
Affiliation(s)
- Mao-Yun Li
- College of Light Industry, Textile and Food Engineering and Healthy Food Evaluation Research Center, Sichuan University, Chengdu, China
| | - Yue Xiao
- College of Light Industry, Textile and Food Engineering and Healthy Food Evaluation Research Center, Sichuan University, Chengdu, China
| | - Kai Zhong
- College of Light Industry, Textile and Food Engineering and Healthy Food Evaluation Research Center, Sichuan University, Chengdu, China
| | - Jin-Rong Bai
- College of Light Industry, Textile and Food Engineering and Healthy Food Evaluation Research Center, Sichuan University, Chengdu, China
| | - Yan-Ping Wu
- College of Light Industry, Textile and Food Engineering and Healthy Food Evaluation Research Center, Sichuan University, Chengdu, China
| | - Jia-Qi Zhang
- College of Light Industry, Textile and Food Engineering and Healthy Food Evaluation Research Center, Sichuan University, Chengdu, China
| | - Hong Gao
- College of Light Industry, Textile and Food Engineering and Healthy Food Evaluation Research Center, Sichuan University, Chengdu, China
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19
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Hatano KI, Yamatsu T. Molasses melanoidin-like products enhance phytoextraction of lead through three Brassica species. INTERNATIONAL JOURNAL OF PHYTOREMEDIATION 2018; 20:552-559. [PMID: 29688055 DOI: 10.1080/15226514.2017.1393397] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/08/2023]
Abstract
Previously, it has been suggested that melanoidin-like products (MLP) from sugarcane molasses may accelerate copper phytoextraction. In this study, we evaluated the facilitatory effect of MLP on phytoextraction in a medium including cadmium or lead, the concentrations of which were adjusted around the regulation values of the Soil Contamination Countermeasures Act in Japan. Three Brassica species were tested based on their fast growth, high biomass productivity, and high heavy metal absorption. Both biomass and lead uptake in the nutrient medium with 1 mM lead nitrate were significantly increased by the addition of MLP, and almost all of the lead was accumulated in the root tissue. Therefore, MLP were able both to detoxify lead ions and to improve their bioavailability in Brassica species. In contrast, only these species with MLP or citric acid survived in the nutrient medium with 1 mM cadmium sulfate. The phytoextraction of cadmium using these species was therefore impractical under the Act.
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Affiliation(s)
- Ken-Ichi Hatano
- a Division of Molecular Science , Faculty of Science and Technology, Gunma University , Kiryu , Gunma , Japan
| | - Takeshi Yamatsu
- a Division of Molecular Science , Faculty of Science and Technology, Gunma University , Kiryu , Gunma , Japan
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20
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Karak T, Kutu FR, Nath JR, Sonar I, Paul RK, Boruah RK, Sanyal S, Sabhapondit S, Dutta AK. 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. Crit Rev Food Sci Nutr 2018; 57:2996-3034. [PMID: 26478953 DOI: 10.1080/10408398.2015.1083534] [Citation(s) in RCA: 27] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/20/2023]
Abstract
Tea (Camellia sinensis L.) is a perennial acidophilic crop, and known to be a nonalcoholic 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 tea infusion. A wide range of micronutrients reported in both made tea and tea infusion could be the major sources of micronutrients for human. The content of B, Co, Cu, Fe, Mn, Mo, and Zn in made tea are ranged from 3.04 to 58.44 μg g-1, below detectable limit (BDL) to 122.4 μg g-1, BDL to 602 μg g-1, 0.275 to 13,040 μg g-1, 0.004 to 15,866 μg g-1, 0.04 to 570.80 μg g-1 and 0.01 to 1120 μg g-1, respectively. Only 3.2 μg L-1 to 7.25 mg L-1, 0.01 μg L-1 to 7 mg L-1, 3.80 μg L-1 to 6.13 mg L-1, 135.59 μg L-1 -11.05 mg L-1, 0.05 μg L-1 to 1980.34 mg L-1, 0.012 to 3.78 μg L-1, and 1.12 μg L-1 to 2.32 μg L-1 of B, Co, Cu, Fe, Mn, Mo, and Zn, respectively, are found in tea infusion which are lower than the prescribed limit of micronutrients in drinking water by World Health Organization. Furthermore, micronutrient contents in tea infusion depend on infusion procedure as well as on the instrument used for analysis. The proportion of micronutrients found in different tea types are 1.0-88.9% for B, 10-60% for Co, 2.0-97.8% for Cu, 67.8-89.9% for Fe, 71.0-87.4% for Mn, 13.3-34% for Mo, and 34.9-83% for Zn. From the results, it can also be concluded that consumption of three cups of tea infusion per day does not have any adverse effect on human health with respect to the referred micronutrients rather got beneficial effects to human.
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Affiliation(s)
- Tanmoy Karak
- a Upper Assam Advisory Centre , Tea Research Association , Assam , India
| | - Funso Raphael Kutu
- b Department of Crop Science, School of Agricultural Sciences , North West University, Mafikeng Campus , Mmabatho , South Africa
| | - Jyoti Rani Nath
- a Upper Assam Advisory Centre , Tea Research Association , Assam , India
| | - Indira Sonar
- a Upper Assam Advisory Centre , Tea Research Association , Assam , India
| | - Ranjit Kumar Paul
- c Indian Agricultural Statistics Research Institute , New Delhi , India
| | | | - Sandip Sanyal
- d Department of Tea Processing and Manufacturing Advisory , Tea Research Association, Tocklai Tea Research Institute , Jorhat , Assam , India
| | - Santanu Sabhapondit
- e Department of Biochemistry , Tea Research Association, Tocklai Tea Research Institute , Jorhat , Assam , India
| | - Amrit Kumar Dutta
- a Upper Assam Advisory Centre , Tea Research Association , Assam , India
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21
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Fan J, Zheng L, Bai Y, Saroussi S, Grossman AR. Flocculation of Chlamydomonas reinhardtii with Different Phenotypic Traits by Metal Cations and High pH. FRONTIERS IN PLANT SCIENCE 2017; 8:1997. [PMID: 29209355 PMCID: PMC5702007 DOI: 10.3389/fpls.2017.01997] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/08/2017] [Accepted: 11/08/2017] [Indexed: 05/31/2023]
Abstract
Concentrating algal cells by flocculation as a prelude to centrifugation could significantly reduce the energy and cost of harvesting the algae. However, how variation in phenotypic traits such as cell surface features, cell size and motility alter the efficiency of metal cation and pH-induced flocculation is not well understood. Our results demonstrate that both wild-type and cell wall-deficient strains of the green unicellular alga Chlamydomonas reinhardtii efficiently flocculate (>90%) at an elevated pH of the medium (pH 11) upon the addition of divalent cations such as calcium and magnesium (>5 mM). The trivalent ferric cation (at 10 mM) proved to be essential for promoting flocculation under weak alkaline conditions (pH ∼8.5), with a maximum efficiency that exceeded 95 and 85% for wild-type CC1690 and the cell wall-deficient sta6 mutant, respectively. Near complete flocculation could be achieved using a combination of 5 mM calcium and a pH >11, while the medium recovered following cell removal could be re-cycled without affecting algal growth rates. Moreover, the absence of starch in the cell had little overall impact on flocculation efficiency. These findings contribute to our understanding of flocculation in different Chlamydomonas strains and have implications with respect to inexpensive methods for harvesting algae with different phenotypic traits. Additional research on the conditions (e.g., pH and metal ions) used for efficient flocculation of diverse algal groups with diverse characteristics, at both small and large scale, will help establish inexpensive procedures for harvesting cell biomass.
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Affiliation(s)
- Jianhua Fan
- State Key Laboratory of Bioreactor Engineering, East China University of Science and Technology, Shanghai, China
- Department of Applied Biology, East China University of Science and Technology, Shanghai, China
- Department of Plant Biology, Carnegie Institution for Science, Stanford, CA, United States
| | - Lvhong Zheng
- State Key Laboratory of Bioreactor Engineering, East China University of Science and Technology, Shanghai, China
| | - Yunpeng Bai
- State Key Laboratory of Bioreactor Engineering, East China University of Science and Technology, Shanghai, China
| | - Shai Saroussi
- Department of Plant Biology, Carnegie Institution for Science, Stanford, CA, United States
| | - Arthur R. Grossman
- Department of Plant Biology, Carnegie Institution for Science, Stanford, CA, United States
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22
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Karak T, Paul RK, Kutu FR, Mehra A, Khare P, Dutta AK, Bora K, Boruah RK. 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. Biol Trace Elem Res 2017; 175:475-487. [PMID: 27339254 DOI: 10.1007/s12011-016-0783-3] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 04/24/2016] [Accepted: 06/12/2016] [Indexed: 01/11/2023]
Abstract
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 micronutrients were higher in tea leaves samples collected from South Africa than those from India while the contents in tea infusions in Indian samples were higher than in South African tea samples. Results of this study revealed that the consumption of 600 mL tea infusion produced from 24 g of made tea per day may be beneficial to human in terms of these micronutrients content. Application of nonparametric tests revealed that most of the data sets do not satisfy the normality assumptions. Hence, the use of both parametric and nonparametric statistical analysis that subsequently revealed significant differences in elemental contents among Indian and South African tea.
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Affiliation(s)
- Tanmoy Karak
- Upper Assam Advisory Centre, Tea Research Association, Dikom, Dibrugarh, Assam, 786101, India.
| | - Ranjit Kumar Paul
- Division of Statistical Genetics, Indian Agricultural Statistics Research Institute, New Delhi, 110012, India
| | - Funso Raphael Kutu
- Department of Crop Science, School of Agricultural Sciences, North West University, Mafikeng Campus, Mmabatho, 2735, South Africa
| | - Aradhana Mehra
- Environmental Sustainability Research Centre, College of Life and Natural Sciences, University of Derby, DE221GB, Derby, UK
| | - Puja Khare
- Central Institute of Medicinal and Aromatic Plants (CIMAP), Near Kukrail Picnic Spot, Lucknow, 226015, India
| | - Amrit Kumar Dutta
- Upper Assam Advisory Centre, Tea Research Association, Dikom, Dibrugarh, Assam, 786101, India
| | - Krishnamoni Bora
- Upper Assam Advisory Centre, Tea Research Association, Dikom, Dibrugarh, Assam, 786101, India
| | - Romesh Kumar Boruah
- Upper Assam Advisory Centre, Tea Research Association, Dikom, Dibrugarh, Assam, 786101, India
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Islam M, Ebihara M. Elemental characterization of Japanese green tea leaves and tea infusion residue by neutron-induced prompt and delayed gamma-ray analysis. ARAB J CHEM 2017. [DOI: 10.1016/j.arabjc.2012.11.008] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022] Open
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24
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Shaltout AA, Abd-Elkader OH. Levels of Trace Elements in Black Teas Commercialized in Saudi Arabia Using Inductively Coupled Plasma Mass Spectrometry. Biol Trace Elem Res 2016; 174:477-483. [PMID: 27166629 DOI: 10.1007/s12011-016-0728-x] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/13/2016] [Accepted: 04/27/2016] [Indexed: 10/21/2022]
Abstract
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, Ni, Cu, Zn, Mo, Cd, As, Cr, Pb, and V, respectively. In order to validate the developed method, a certified reference material of green tea was analyzed. Further comparison with the results obtained from high-resolution continuum source atomic absorption spectrometry (HR-CS-AAS) was demonstrated. The obtained good agreement confirms the validity of the investigated method. Fortunately, the concentrations of the heavy metals locate on the range of the international values. The highest metal content was found in Al-Rabee tea, and this type results should be confirmed by using a large number of samples in order to have satisfied and confirmed statistical analysis results.
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Affiliation(s)
- Abdallah A Shaltout
- Physics Department, Faculty of Science, Taif University, P.O. Box 888, Taif, 21974, Saudi Arabia.
- Spectroscopy Department, Physics Division, National Research Center, El-Behooth Str., 12622 Dokki, Cairo, Egypt.
| | - Omar H Abd-Elkader
- Department of Zoology, Science College, King Saud University, P.O. Box 2455, Riyadh, 11451, Saudi Arabia
- Electron Microscope and Thin Films Department, National Research Center (NRC), El-Behooth Street, 12622, Dokki, Cairo, Egypt
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25
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Multivariate data reduction and discrimination of black and green teas due to the physical fractionation pattern of selected metals determined in their infusions. Talanta 2016; 160:314-324. [PMID: 27591619 DOI: 10.1016/j.talanta.2016.07.026] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/18/2016] [Revised: 07/05/2016] [Accepted: 07/10/2016] [Indexed: 12/26/2022]
Abstract
An analytical scheme for the physical fractionation of Al, Ba, Ca, Cr, Cu, Fe, K, Mg, Mn, Na, Ni, Sr and Zn in black and green teas infusions was proposed. It was based on the ultrafiltration/centrifugation through five membranes having molecular weight cut-offs of 100, 50, 30, 10 and 5kDa. The concentrations of the studied metals in the highest and the lowest molecular weight fractions were found to classify and discriminate the analyzed teas infusions much better than the total metals concentrations. The differences in the physical fractionation patterns of these metals assessed for both tea varieties was profound and let to simply classify the infusions of different black and green teas by principal component analysis and linear discriminant analysis.
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26
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Nkansah MA, Opoku F, Ackumey AA. Risk assessment of mineral and heavy metal content of selected tea products from the Ghanaian market. ENVIRONMENTAL MONITORING AND ASSESSMENT 2016; 188:332. [PMID: 27154053 DOI: 10.1007/s10661-016-5343-y] [Citation(s) in RCA: 37] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/06/2016] [Accepted: 04/29/2016] [Indexed: 05/06/2023]
Abstract
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 concentrations were in the order: Ca > Fe > As > Cd > Zn > Pb. The average contents of Ca, Fe, Zn, Pb, Cd, and As in the samples were 94.08, 6.15, 0.20, 0.16, 0.36, and 1.66 mg/kg, respectively. All the minerals and heavy metals were below the maximum permissible limits stipulated by the World Health Organization (WHO) and US Pharmacopeia (USP). Metal-to-metal correlation indicated strong correlations between As/Zn, Cd/Zn, Cd/As, and Pb/As pairs. Factor analysis demonstrated a clear separation between minerals, grouped on one side, and heavy metals, clustered on another side. Both the target hazard quotient (THQ) and hazard index (HI) levels in green tea were far below 1, suggesting that consumption of green tea should pose no potential risk to human health. However, carcinogenic risk levels for arsenic were high; R > 10(-6). The results showed that residents in Kumasi consume tea could be at risk from exposure to these heavy metals and minerals.
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Affiliation(s)
| | - Francis Opoku
- Department of Chemistry, Kwame Nkrumah University of Science and Technology, Kumasi, Ghana
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Cook MC, Stukel MJ, Zhang W, Mercier JF, Cooke MW. The determination of Fukushima-derived cesium-134 and cesium-137 in Japanese green tea samples and their distribution subsequent to simulated beverage preparation. JOURNAL OF ENVIRONMENTAL RADIOACTIVITY 2016; 153:23-30. [PMID: 26714059 DOI: 10.1016/j.jenvrad.2015.12.010] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/27/2015] [Revised: 11/27/2015] [Accepted: 12/08/2015] [Indexed: 06/05/2023]
Abstract
Health Canada's Radiation Protection Bureau has identified trace quantities of (134)Cs and (137)Cs in commercially available green tea products of Japanese origin. Referenced to March 11, 2011, the activity ratio ((134)Cs/(137)Cs) has been determined to be 1:1, which supports an origin from the Fukushima Dai-ichi Nuclear Power Plant accident. The upper limits of typical tea beverage preparation conditions were applied to the most contaminated of these green tea samples to determine the proportion of radiocesium contamination that would be available for human consumption. The distribution of radiocesium among the components of the extraction experiments (water, residual tea solid, and filter media) was determined by both conventional and Compton-suppressed gamma spectroscopy. The latter aided tremendously in providing a more complete radiocesium distribution profile, particularly for the shorter-lived (134)Cs. Cesium extraction efficiencies of 64 ± 7% and 64 ± 5% were determined based on (134)Cs and (137)Cs, respectively. Annual, effective dose estimates from ingestion of (137)Cs and (134)Cs (1.8-3.7 μSv), arising from the consumption of tea beverages prepared from the most contaminated of these samples, are insignificant relative to both total (∼ 2.4 mSv) and ingested (∼ 0.28 mSv) annual effective doses received from naturally occurring radioactive sources. As such, there is no health concern arising from the consumption of green tea beverages contaminated with radiocesium at the levels encountered in this study.
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Affiliation(s)
- Matthew C Cook
- Radiation Surveillance Division, Radiation Protection Bureau of Health Canada, 775 Brookfield Road, Ottawa, ON K1A 1C1, Canada
| | - Matthew J Stukel
- Radiation Surveillance Division, Radiation Protection Bureau of Health Canada, 775 Brookfield Road, Ottawa, ON K1A 1C1, Canada
| | - Weihua Zhang
- Radiation Surveillance Division, Radiation Protection Bureau of Health Canada, 775 Brookfield Road, Ottawa, ON K1A 1C1, Canada
| | - Jean-Francois Mercier
- Radiation Surveillance Division, Radiation Protection Bureau of Health Canada, 775 Brookfield Road, Ottawa, ON K1A 1C1, Canada
| | - Michael W Cooke
- Radiation Surveillance Division, Radiation Protection Bureau of Health Canada, 775 Brookfield Road, Ottawa, ON K1A 1C1, Canada.
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Barone G, Giacominelli-Stuffler R, Storelli MM. Evaluation of trace metal and polychlorinated biphenyl levels in tea brands of different origin commercialized in Italy. Food Chem Toxicol 2015; 87:113-9. [PMID: 26683308 DOI: 10.1016/j.fct.2015.12.008] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/12/2015] [Revised: 11/30/2015] [Accepted: 12/07/2015] [Indexed: 10/22/2022]
Abstract
The objectives of this study were to investigate the trace element (Hg, Cd, Pb, Cu, Zn, Ni, Fe, Cr and Se) and polychlorinated biphenyl (PCBs) content of several commercially available brands of green and black tea marketed in Italy. The concentrations these chemicals were found to be variable and largely dependent upon the type and brand of analysed tea. The most abundant element among the essential elements was Fe, followed by Zn, Cu, Se, Ni and Cr, whereas Pb was the predominant among the tested nonessential elements followed by Hg and Cd. Assessment based on several available guidelines showed that element content were low, except for Hg and Ni. The PCBs concentrations were generally low, with a homologue profile dominated by low-chlorinated congeners, namely three- and tetra-PCBs accounting for more than 60% of the total residue. Apart from trace elements, this is the first study documenting in detail the concentrations and congener distribution of PCBs in tea samples of different origin.
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Affiliation(s)
- Grazia Barone
- Biosciences, Biotechnologies and Biopharmaceutical Department, University of Bari, Strada Prov. le Per Casamassima Km 3, 70010 Valenzano, BA, Italy
| | | | - Maria M Storelli
- Biosciences, Biotechnologies and Biopharmaceutical Department, University of Bari, Strada Prov. le Per Casamassima Km 3, 70010 Valenzano, BA, Italy.
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29
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Oxalate, magnesium and calcium content in selected kinds of tea: impact on human health. Eur Food Res Technol 2015. [DOI: 10.1007/s00217-015-2548-1] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
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Ghoochani M, Shekoohiyan S, Yunesian M, Nazmara S, Mahvi AH. Determination of aluminum and zinc in infusion tea cultivated in north of Iran. JOURNAL OF ENVIRONMENTAL HEALTH SCIENCE AND ENGINEERING 2015; 13:49. [PMID: 26085934 PMCID: PMC4470039 DOI: 10.1186/s40201-015-0196-9] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 06/19/2013] [Accepted: 05/04/2015] [Indexed: 12/07/2022]
Abstract
To determine aluminum and zinc levels in black tea cultivated in north of Iran, 105 black tea samples were collected from the tea growing regions of Guilan and Mazandaran provinces and were analyzed for Al and Zn concentration of tea infusion. Contents of all elements were analyzed three times separately by using an Inductively Coupled Plasma Atomic Emission Spectrometry (ICP - AES). The solubility of Al and Zn in infusions at 5, 15 and 60 min with boiling water showed that the mean level of Al in the third infusion was the highest (262.09 mg/kg) and in the first infusion was the lowest (169.40 mg/kg). The mean level of Zn in the third infusion was the highest (51.40 mg/kg) and in the second infusion was the lowest (48.33 mg/kg). The analysis of results also showed that the location factor influences the contents of these metals at different infusions.
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Affiliation(s)
- Mahboobeh Ghoochani
- Department of Environmental Health Engineering, School of Public Health, Tehran University of Medical Sciences, Tehran, Iran
| | - Sakine Shekoohiyan
- Department of Environmental Health Engineering, School of Public Health, Hormozgan University of Medical Sciences, Bandar- Abbas, Iran
| | - Masoud Yunesian
- Department of Environmental Health Engineering, School of Public Health, Tehran University of Medical Sciences, Tehran, Iran
| | - Shahrokh Nazmara
- Department of Environmental Health Engineering, School of Public Health, Tehran University of Medical Sciences, Tehran, Iran
| | - Amir Hossein Mahvi
- Department of Environmental Health Engineering, School of Public Health, Tehran University of Medical Sciences, Tehran, Iran ; Center for Solid Waste Research, Institute for Environmental Research, Tehran University of Medical Sciences, Tehran, Iran ; National Institute of Health Research, Tehran University of Medical Sciences, Tehran, Iran
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31
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Comparison of the detection characteristics of trace species using laser-induced breakdown spectroscopy and laser breakdown time-of-flight mass spectrometry. SENSORS 2015; 15:5982-6008. [PMID: 25769051 PMCID: PMC4435158 DOI: 10.3390/s150305982] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 12/16/2014] [Revised: 02/27/2015] [Accepted: 02/28/2015] [Indexed: 12/23/2022]
Abstract
The rapid and precise element measurement of trace species, such as mercury, iodine, strontium, cesium, etc. is imperative for various applications, especially for industrial needs. The elements mercury and iodine were measured by two detection methods for comparison of the corresponding detection features. A laser beam was focused to induce plasma. Emission and ion signals were detected using laser-induced breakdown spectroscopy (LIBS) and laser breakdown time-of-flight mass spectrometry (LB-TOFMS). Multi-photon ionization and electron impact ionization in the plasma generation process can be controlled by the pressure and pulse width. The effect of electron impact ionization on continuum emission, coexisting molecular and atomic emissions became weakened in low pressure condition. When the pressure was less than 1 Pa, the plasma was induced by laser dissociation and multi-photon ionization in LB-TOFMS. According to the experimental results, the detection limits of mercury and iodine in N2 were 3.5 ppb and 60 ppb using low pressure LIBS. The mercury and iodine detection limits using LB-TOFMS were 1.2 ppb and 9.0 ppb, which were enhanced due to different detection features. The detection systems of LIBS and LB-TOFMS can be selected depending on the condition of each application.
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Zhao Y, Tu Y, Xu M, Li J, Du H. Physicochemical and nutritional characteristics of preserved duck egg white. Poult Sci 2014; 93:3130-7. [PMID: 25332139 DOI: 10.3382/ps.2013-03823] [Citation(s) in RCA: 43] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022] Open
Abstract
In this paper, the physicochemical and nutritional characteristics of preserved duck egg white were analyzed and compared with fresh egg and hard-cooked egg white (n = 3). The data obtained showed that the preserved egg white was rich in essential amino acids and minerals, such as Ca, Mg, Fe, Zn, Cu, K, and Na. After fresh duck eggs were processed into preserved eggs, contents of moisture, CP, amino acid, and water-soluble vitamin of egg white significantly decreased (P < 0.05); however, pH, free amino acid content, and most inorganic elemental contents of egg white significantly increased (P < 0.05). The preserved egg white had higher a* (redness/greenness) and b* values (yellowness/blueness; P < 0.05) and lower L* value (lightness; P < 0.05) than hard-cooked egg white. The gel hardness of preserved egg white was approximately 50% of hard-cooked egg white; however, its springiness and cohesiveness were approximately 1.5 times of hard-cooked egg white. The results indicated that pickling with alkaline and other additives can significantly change physical properties and chemical composition of duck egg white, which make preserved egg white with characteristics of rich elements, brown color, and high springiness, but low vitamin.
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Affiliation(s)
- Yan Zhao
- Jiangxi Key Laboratory of Natural Products and Functional Food, Jiangxi Agricultural University, Nanchang 330045, China State Key Laboratory of Food Science and Technology, Ministry of Education, Nanchang University, Nanchang 330047, China Engineering Research Center of Biomass Conversion, Ministry of Education, Nanchang University, Nanchang 330047, China
| | - Yonggang Tu
- Jiangxi Key Laboratory of Natural Products and Functional Food, Jiangxi Agricultural University, Nanchang 330045, China
| | - Mingsheng Xu
- Jiangxi Key Laboratory of Natural Products and Functional Food, Jiangxi Agricultural University, Nanchang 330045, China
| | - Jianke Li
- State Key Laboratory of Food Science and Technology, Ministry of Education, Nanchang University, Nanchang 330047, China Engineering Research Center of Biomass Conversion, Ministry of Education, Nanchang University, Nanchang 330047, China
| | - Huaying Du
- Jiangxi Key Laboratory of Natural Products and Functional Food, Jiangxi Agricultural University, Nanchang 330045, China
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Zheng H, Li JL, Li HH, Hu GC, Li HS. Analysis of Trace Metals and Perfluorinated Compounds in 43 Representative Tea Products from South China. J Food Sci 2014; 79:C1123-9. [DOI: 10.1111/1750-3841.12470] [Citation(s) in RCA: 27] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/11/2013] [Accepted: 03/11/2014] [Indexed: 11/29/2022]
Affiliation(s)
- Hai Zheng
- Key Laboratory of Agro-Environment in the Tropics; China Ministry of Agriculture; South China Agricultural Univ; Guangzhou 510642 China
| | - Jian-Long Li
- Key Laboratory of Agro-Environment in the Tropics; China Ministry of Agriculture; South China Agricultural Univ; Guangzhou 510642 China
- Drinkable Plants Inst. (Tea Research Center); Guangdong Academy of Agricultural Sciences; Guangzhou 510640 China
| | - Hai-Hang Li
- Guangdong Provincial Key Lab of Biotechnology for Plant Development and College of Life Sciences; South China Normal Univ; Guangzhou 510631 China
| | - Guo-Cheng Hu
- South China Inst. of Environmental Sciences; Ministry of Environmental Protection; Guangzhou 510655 China
| | - Hua-Shou Li
- Key Laboratory of Agro-Environment in the Tropics; China Ministry of Agriculture; South China Agricultural Univ; Guangzhou 510642 China
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Simple and Fast Sample Preparation Procedure Prior to Multi-element Analysis of Slim Teas by ICP OES. FOOD ANAL METHOD 2014. [DOI: 10.1007/s12161-014-9850-6] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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Ščančar J, Zuliani T, Milačič R. Study of nickel content in Ni-rich food products in Slovenia. J Food Compost Anal 2013. [DOI: 10.1016/j.jfca.2013.06.011] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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36
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Shaltout AA, Abdel-Aal MS, Welz B, Castilho INB. Determination of Cd, Cu, Ni, and Pb in Black Tea from Saudi Arabia using Graphite Furnace Atomic Absorption Spectrometry after Microwave-Assisted Acid Digestion. ANAL LETT 2013. [DOI: 10.1080/00032719.2013.784918] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
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37
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Pohl P, Stelmach E, Szymczycha-Madeja A. Determination of Total Concentrations and Chemical and Physical Fractionation Forms of Manganese in Infusions of Ground Coffees. FOOD ANAL METHOD 2013. [DOI: 10.1007/s12161-013-9674-9] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
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38
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Falahi E, Hedaiati R. Heavy metal content of black teas consumed in Iran. FOOD ADDITIVES & CONTAMINANTS PART B-SURVEILLANCE 2013; 6:123-6. [DOI: 10.1080/19393210.2013.764550] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
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39
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Cheng CL, Chang HH, Huang PJ, Chu YT, Lin SY. Composition and distribution of elements and ultrastructural topography of a human cardiac calculus. Biol Trace Elem Res 2013; 152:143-51. [PMID: 23404458 DOI: 10.1007/s12011-013-9603-1] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 11/20/2012] [Accepted: 01/03/2013] [Indexed: 11/25/2022]
Abstract
Trace elements (TEs) may contribute to the formation of calculi or stones or be involved in the aetiopathogenesis of stone diseases. The compositions and spatial distribution of elements from the inner nucleus to outer crust of the cardiac calculus were investigated by energy-dispersive X-ray fluorescence (EDXRF) spectrometer. The surface topograph, distribution map of elements, elemental and chemical compositions were also determined by environmental scanning electron microscope (ESEM)-energy-dispersive X-ray (EDX) analysis. Twenty-five elements were identifiable from 18 positions on the cardiac calculus by EDXRF spectrometer, in which the highest concentrations of toxic TEs (Ni, Pt, Hg, Sn, Pb, W, Au, Al, Si) and higher levels of essential TEs (Ca, Sr, Cr, P) were detected. A moderate positive Pearson's correlation between TEs concentrations of Mg, Ca or P and location differences from centre to periphery in the cardiac calculus was observed. A positive correlation was also found for Ca/Zn and Ca/Cu, indicating the gradual increase of calcium concentration from inner nucleus to outer crust of cardiac calculus. The drop-like nodules/crystals on the surface of petrous part of cardiac calculus were observed from ESEM analysis. ESEM-EDX analysis determined the calculus to be predominantly composed of calcium hydroxyapatite and cholesterol, as indicated by the petrous surface and drop-like nodules/crystals, respectively. This composition was confirmed using a portable Raman analyser. The spatial distribution analysis indicated a gradual increase in Mg, P and Ca concentrations from the inner nucleus to the outer crust of the cardiac calculus. The major chemical compositions of calcium hydroxyapatite and cholesterol were detected on this cardiac calculus.
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Affiliation(s)
- Ching-Li Cheng
- Department of Nursing, National Tainan Institute of Nursing, Tainan, Taiwan, Republic of China
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40
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Ni speciation in tea infusions by monolithic chromatography—ICP-MS and Q-TOF-MS. Anal Bioanal Chem 2012; 405:2041-51. [DOI: 10.1007/s00216-012-6611-5] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/05/2012] [Revised: 11/19/2012] [Accepted: 11/27/2012] [Indexed: 10/27/2022]
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41
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Welna M, Szymczycha-Madeja A, Stelmach E, Pohl P. Speciation and Fractionation of Elements in Tea Infusions. Crit Rev Anal Chem 2012. [DOI: 10.1080/10408347.2012.694730] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/07/2022]
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42
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Simultaneous Determination of 20 Inorganic Elements in Preserved Egg Prepared with Different Metal Ions by ICP-AES. FOOD ANAL METHOD 2012. [DOI: 10.1007/s12161-012-9494-3] [Citation(s) in RCA: 36] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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43
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Karrari P, Mehrpour O, Abdollahi M. A systematic review on status of lead pollution and toxicity in Iran; Guidance for preventive measures. Daru 2012; 20:2. [PMID: 23226111 PMCID: PMC3514537 DOI: 10.1186/1560-8115-20-2] [Citation(s) in RCA: 125] [Impact Index Per Article: 10.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/04/2012] [Accepted: 07/19/2012] [Indexed: 12/23/2022] Open
Abstract
Lead is an old environmental metal which is presented everywhere and lead poisoning is an important health issue in many countries in the world including Iran. It is known as a silent environmental disease which can have life-long adverse health effects. In children, the most vulnerable population, mental development of children health effects is of the greatest influence. Low level lead exposure can significantly induce motor dysfunctions and cognitive impairment in children. The sources of lead exposure vary among countries. Occupational lead exposure is an important health issue in Iran and mine workers, employees of paint factories, workers of copying centers, drivers, and tile making factories are in higher risk of lead toxicity. Moreover lead processing industry has always been a major of concern which affects surface water, drinking waters, and ground waters, even water of Caspian Sea, Persian Gulf and rivers due to increasing the number of industries in vicinity of rivers that release their waste discharges into river or sea. In addition, lead contamination of soil and air especially in vicinity of polluted and industrialized cities is another health problem in Iran. Even foods such as rice and fishes, raw milk, and vegetables which are the most common food of Iranian population are polluted to lead in some area of Iran. Adding lead to the opium is a recently health hazard in Iran that has been observed among opium addicts. There are few studies evaluated current status of lead exposure and toxicity in the Iranian children and pregnant women which should be taken into account of authorities. We recommend to identify sources, eliminate or control sources, and monitor environmental exposures and hazards to prevent lead poisoning.
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Affiliation(s)
- Parissa Karrari
- Medical Toxicology and Drug Abuse Research Center (MTDRC), Pasdaran Avenue, Birjand University of Medical Sciences, Birjand, 9713643138, Iran
- Department of Clinical Toxicology and Forensic Medicine, Faculty of Medicine, Birjand University of Medical Sciences, Ghaffari Avenue, Birjand, 9717853577, Iran
| | - Omid Mehrpour
- Medical Toxicology and Drug Abuse Research Center (MTDRC), Pasdaran Avenue, Birjand University of Medical Sciences, Birjand, 9713643138, Iran
- Department of Clinical Toxicology and Forensic Medicine, Faculty of Medicine, Birjand University of Medical Sciences, Ghaffari Avenue, Birjand, 9717853577, Iran
| | - Mohammad Abdollahi
- Department of Toxicology and Pharmacology, Faculty of Pharmacy, and Pharmaceutical Sciences Research Center, Tehran University of Medical Sciences, Tehran, 1417614411, Iran
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44
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Pytlakowska K, Kita A, Janoska P, Połowniak M, Kozik V. Multi-element analysis of mineral and trace elements in medicinal herbs and their infusions. Food Chem 2012; 135:494-501. [PMID: 22868119 DOI: 10.1016/j.foodchem.2012.05.002] [Citation(s) in RCA: 107] [Impact Index Per Article: 8.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/26/2011] [Revised: 12/16/2011] [Accepted: 05/02/2012] [Indexed: 11/29/2022]
Abstract
Twelve mineral and trace elements (Al, B, Ba, Fe, Zn, Mn, Mg, K, Na, P, Cu, Sr, and Ca) were determined in the herbs and their infusions consumed for medical purposes in Poland such as chamomile (Matricaria chamomilla L.), peppermint (Mentha xpiperita), melissa (Melissa officinalis), sage (Salvia officinalis), nettle (Urtica dioica), linden (Tilia vulgaris) and St. John's wort (Hypericum calycinum). Dry digestion procedure for total concentration and wet digestion procedure for infusions were applied under optimized conditions for dissolution of medicinal herbs. Element concentrations in herbs and their infusions were determined by ICP-OES. The accuracy and precision were verified against NCS DC 73349 - bush branches and leaves certified reference material. The result of total concentrations of elements in herb leaves shows that all herbs contain most of the elements, except K and P, in the μg/g range, and that elemental concentrations varied widely. Moreover, on the basis of experimental results for the extraction efficiencies, the elements in herb infusions were classified into three specific groups: highly-extractable (>55%) including K; moderately-extractable (20-55%) including Mg, Na, P, B, Zn and Cu and poorly-extractable (<20%) including Al, Fe, Mn, Ba, Ca and Sr. The results of analysis were evaluated statistically using ANOVA one-way and three-way analysis of variance, variance correlation test and Spearman's test.
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Affiliation(s)
- K Pytlakowska
- Institute of Chemistry, University of Silesia, ul. Szkolna 9, 40-006 Katowice, Poland.
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Korkmaz Görür F, Keser R, Akçay N, Dizman S, Okumuşoğlu NT. Radionuclides and heavy metals concentrations in Turkish market tea. Food Control 2011. [DOI: 10.1016/j.foodcont.2011.06.005] [Citation(s) in RCA: 33] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
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47
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Desideri D, Meli M, Roselli C, Feduzi L. Polarized X ray fluorescence spectrometer (EDPXRF) for the determination of essential and non essential elements in tea. Microchem J 2011. [DOI: 10.1016/j.microc.2011.01.008] [Citation(s) in RCA: 35] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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48
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Wu J, Tan Y, Wang Y, Xu R. Toxic metal contamination in Artemisia annua L. herbal preparations from different commercial sources in China. J Nat Med 2011; 65:656-61. [DOI: 10.1007/s11418-011-0511-4] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/04/2010] [Accepted: 01/06/2011] [Indexed: 11/29/2022]
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49
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ZHU Y, NARUKAWA T, INAGAKI K, KUROIWA T, CHIBA K. Development of a Certified Reference Material (NMIJ CRM 7505-a) for the Determination of Trace Elements in Tea Leaves. ANAL SCI 2011; 27:1149-55. [DOI: 10.2116/analsci.27.1149] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
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50
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