scholarly journals Mercury accumulation in vegetable Houttuynia cordata Thunb. from two different geological areas in southwest China and implications for human consumption

2021 ◽  
Vol 11 (1) ◽  
Author(s):  
Qingfeng Wang ◽  
Zhonggen Li ◽  
Xinbin Feng ◽  
Ao Wang ◽  
Xinyu Li ◽  
...  
Keyword(s):  
Southwest China ◽  
Dietary Habits ◽  
Mining Area ◽  
Human Consumption ◽  
Mehg Exposure ◽  
Exposure Risk ◽  
Houttuynia Cordata ◽  
Mining Areas ◽  
Houttuynia Cordata Thunb ◽  
Hg Mining

AbstractHouttuynia cordata Thunb. (HCT) is a common vegetable native to southwest China, and grown for consumption. The results suggested that THg contents in all parts and MeHg in underground parts of HCT in Hg mining areas were much higher than those in non-Hg mining areas. The highest THg and MeHg content of HCT were found in the roots, followed by the other tissues in the sequence: roots > leaves > rhizomes > aboveground stems (THg), and roots > rhizomes > aboveground stems > leaves (MeHg). The average THg bioaccumulation factor (BCF) of HCT root in the Hg mining area and in non-Hg mining areas could reach 1.02 ± 0.71 and 0.99 ± 0.71 respectively, indicating that HCT is a Hg accumulator. And the THg and MeHg contents in all tissues of HCT, including the leaves, were significantly correlated with THg and MeHg content in the soil. Additionally, preferred dietary habits of HCT consumption could directly affect the Hg exposure risk. Consuming the aboveground parts (CAP) of HCT potentially poses a high THg exposure risk and consuming the underground parts (CUP) may lead to a relatively high MeHg exposure risk. Only consuming the rhizomes (OCR) of the underground parts could significantly reduce the exposure risk of THg and to some extent of MeHg. In summary, HCT should not be cultivated near the Hg contaminated sites, such as Hg tailings, as it is associated with a greater risk of Hg exposure and high root Hg levels, and the roots should be removed before consumption to reduce the Hg risk.

scholarly journals Effects of Fermented Houttuynia cordata Thunb. on Diabetic Rats Induced by a High-Fat Diet with Streptozotocin and on Insulin Resistance in 3T3-L1 Adipocytes

2021 ◽  
Vol 2021 ◽  
pp. 1-15
Author(s):  
Wannachai Sakuludomkan ◽  
Ranchana Yeewa ◽  
Subhawat Subhawa ◽  
Chakkrit Khanaree ◽  
Arisa Imsumran Bonness ◽  
...  
Keyword(s):  
Oxidative Stress ◽  
Insulin Resistance ◽  
Cell Function ◽  
Pancreatic Beta Cell ◽  
Biological Properties ◽  
Diabetic Rats ◽  
Human Consumption ◽  
High Fat ◽  
Houttuynia Cordata ◽  
Houttuynia Cordata Thunb

Houttuynia cordata Thunb. (plukaow in Thai language) exhibits several biological properties, and many products of H. cordata are therefore commercially available for human consumption, such as fermented juice or tablets as food supplements. This study aimed to investigate the antidiabetic effects of fermented H. cordata (HC) in high-fat diets and streptozotocin-induced diabetic rats. Oral administration of HC at a dose of 100 mg/kg.bw not only maintained bodyweight, food intake, and water consumption but also reduced blood glucose levels and improved glucose tolerance ability in the diabetic rats. Moreover, HC also decreased oxidative stress markers in serum and inflammatory-related mediators in pancreas tissues, indicating the improvement of pancreatic beta-cell function in the diabetic rats. In order to clarify the mechanism of HC, the effects of ethanolic extract of HC (HCE) on insulin resistance were determined in 3T3-L1 adipocytes. FHE could recover glucose uptake and decrease lipolysis in palmitate-treated 3T3-L1 adipocytes. Taken together, these results demonstrate that HC can improve diabetic symptoms by enhancing insulin sensitivity, reducing oxidative stress, and suppressing inflammation.

scholarly journals Health Risk Assessment of Inorganic Mercury and Methylmercury via Rice Consumption in the Urban City of Guiyang, Southwest China

2019 ◽  
Vol 16 (2) ◽  
pp. 216 ◽  
Author(s):  
Jialiang Han ◽  
Zhuo Chen ◽  
Jian Pang ◽  
Longchao Liang ◽  
Xuelu Fan ◽  
...  
Keyword(s):  
Southwest China ◽  
Inorganic Mercury ◽  
National Standard ◽  
Mehg Exposure ◽  
Mining Areas ◽  
Urban City ◽  
Rice Consumption ◽  
Rice Samples ◽  
Exposure Levels ◽  
Daily Intakes

Rice consumption is the main methylmercury (MeHg) exposure route for residents in mercury (Hg) mining areas. However, there is limited studies on mercury in commercial rice, which has high liquidity and can be directly consumed by urban residents. This study measured the total Hg (THg) and MeHg concentrations in 146 rice samples purchased from the markets in Guiyang city, southwest China, and both the inorganic Hg (IHg) and MeHg estimated daily intakes (EDIs) and hazard quotients (HQs) were calculated according to rice consumption. The THg concentrations in all rice samples (range: 0.97 to 13.10 μg·kg−1; mean: 3.88 μg·kg−1) were lower than the Chinese national standard (20 μg·kg−1). The average MeHg concentration in rice was 1.16 μg·kg−1. The total HQs (THQs) ranged from 0.0106 to 0.1048, with a mean of 0.0462, which was far lower than 1. This result suggests that there were low Hg exposure levels through consumption of commercial rice in residents of Guiyang.

Mercury methylation in rice paddies and its possible controlling factors in the Hg mining area, Guizhou province, Southwest China

2016 ◽  
Vol 215 ◽  
pp. 1-9 ◽  
Author(s):  
Lei Zhao ◽  
Guangle Qiu ◽  
Christopher W.N. Anderson ◽  
Bo Meng ◽  
Dingyong Wang ◽  
...  
Keyword(s):  
Southwest China ◽  
Mining Area ◽  
Controlling Factors ◽  
Guizhou Province ◽  
Mercury Methylation ◽  
Rice Paddies ◽  
Hg Mining

scholarly journals Multifunctional Activities of Gold Nanoparticles Biosynthesized Using Bacteria Isolated from Mining Areas

2021 ◽  
Vol 11 (8) ◽  
pp. 3670
Author(s):  
Chih-Yu Chen ◽  
Yung-Chu Chang ◽  
Teh-Hua Tsai ◽  
Man-Hai Liu ◽  
Ying-Chien Chung
Keyword(s):  
Gold Nanoparticles ◽  
Mining Area ◽  
Synthesis Process ◽  
Average Particle ◽  
Bifidobacterium Lactis ◽  
E Coli ◽  
Mining Areas ◽  
Skin Cells ◽  
Study Results ◽  
Antityrosinase Activity

Research on gold nanoparticles (AuNPs) has often focused on their physical, chemical, and crystalline characteristics. Commercial AuNPs have been applied in the diverse fields of biomedicine, catalysis, photovoltaics, and sensing. In this study, we explored the various activities of AuNPs to widen their applicability. This paper presents a simple and rapid synthesis process of AuNPs with bacteria isolated from a gold mining area. We also investigated the optimization of reaction parameters for AuNP synthesis. The study results revealed that among the isolated strains, Bifidobacterium lactis and Escherichia coli demonstrated the highest capabilities of AuNP synthesis. The optimal pH values for AuNP synthesis by B. lactis (BLAuNPs) and E. coli (ECAuNPs) were 5.0 for 72 h of incubation and 8.0 for 24 h of incubation. The average particle sizes of ECAuNPs and BLAuNPs were 4.2 and 5.6 nm, respectively. Furthermore, these biogenic AuNPs were found to be stable with no aggregation after 3 months of storage. BLAuNPs and ECAuNPs exhibited high levels of antimicrobial, antioxidant, photocatalytic, and antityrosinase activity. Moreover, they were noncytotoxic to skin cells even at 100% melanin inhibitory concentrations. Considering the demonstrated multifunctional activities of AuNPs, BLAuNPs and ECAuNPs have promising potential for commercialization.

Atmospheric deposition of antimony in a typical mercury-antimony mining area, Shaanxi Province, Southwest China

2019 ◽  
Vol 245 ◽  
pp. 173-182 ◽  
Author(s):  
Ming Ao ◽  
Guangle Qiu ◽  
Chao Zhang ◽  
Xiaohang Xu ◽  
Lei Zhao ◽  
...  
Keyword(s):  
Atmospheric Deposition ◽  
Southwest China ◽  
Mining Area ◽  
Shaanxi Province

scholarly journals Effects of botanicals against anthracnose and blight diseases of Houttuynia cordata Thunb

2016 ◽  
Vol 42 (1) ◽  
pp. 41-48
Author(s):  
Trisha Saha ◽  
Shamim Shamsi
Keyword(s):  
Azadirachta Indica ◽  
Pathogenic Fungi ◽  
Tagetes Erecta ◽  
Citrus Limon ◽  
Leaf Extracts ◽  
Houttuynia Cordata ◽  
Datura Metel ◽  
Houttuynia Cordata Thunb

Anthracnose and blight were recorded on Houttuynia cordata Thunb. during April 2013 to December 2013. The isolated fungi from the symptomatic plants were identified as Alterneria alternata (Fr.) Keissler and Colletotrichum gloeosporoides (Penz.) Sacc. Ethanol leaf extracts of five plants viz.,Azadirachta indica L., Citrus limon L., Datura metel L., Sennaalata L. and Tagetes erecta L.were evaluated against the pathogenic fungi A. alternata and C. gloeosporoides at 5%, 10% and 20% concentrations in vitro. A. indica recorded as good inhibitor against the test fungi followed by C. limon, S. alata, D. metel and T.erecta. In vivo treatment also showed that A.indica is the most effective in controlling diseases at 10% concentration. The plants treated with A. indica were fresh and healthy up to one month of observation.J. Asiat. Soc. Bangladesh, Sci. 42(1): 41-48, June 2016

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