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Heavy metal screen

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https://www.readbyqxmd.com/read/29792559/frozen-white-leg-shrimp-litopenaeus-vannamei-in-korean-markets-as-a-source-of-aeromonas-spp-harboring-antibiotic-and-heavy-metal-resistance-genes
#1
Benthotage C J De Silva, Sabrina Hossain, Pasan S Dahanayake, Gang-Joon Heo
As the most consumed shrimp variety, white-leg shrimp (Litopenaeus vannamei) owns a high market demand in Korea. This study sought to screen the frozen white-leg shrimp for Aeromonas spp. harboring antimicrobial and heavy metal resistance characteristics. A total of 44 Aeromonas spp. strains were isolated and tested for antibiotic susceptibility and heavy metal tolerance followed by PCR-based detection of resistance genes and integrons. It was observed that resistance to ampicillin and oxacillin was 100% among isolates...
May 24, 2018: Microbial Drug Resistance: MDR: Mechanisms, Epidemiology, and Disease
https://www.readbyqxmd.com/read/29785604/cadmium-phytoextraction-potential-of-king-grass-pennisetum-sinese-roxb-and-responses-of-rhizosphere-bacterial-communities-to-a-cadmium-pollution-gradient
#2
Li Hu, Ru Wang, Xianglin Liu, Bo Xu, Tuanhui Xie, Yunyun Li, Mingkuang Wang, Guo Wang, Yanhui Chen
Screening for tolerant and high biomass producing plants is important for phytoextraction efforts in remediating agricultural soils contaminated by heavy metals. We carried out a greenhouse experiment involving a soil cadmium (Cd) concentration gradient (0.1, 0.5, 1, 2, 4, and 8 mg kg-1 ) to assess growth and phytoextraction capacity of king grass (Pennisetum sinese Roxb.) in soils contaminated by Cd and to explore changes in diversity and structure of rhizosphere soil bacterial communities in response to long-term Cd pollution...
May 21, 2018: Environmental Science and Pollution Research International
https://www.readbyqxmd.com/read/29768874/nanocarriers-immobilized-proteases-and-their-industrial-applications-an-overview
#3
Qayyum Husain
The enzymes proteases have attracted a lot of attention due to their high demand in various industrial and other sectors since past several decades. Nanosupport bound proteases showed high efficiency of binding and yield of immobilization. Enzymes attached to such support were found significantly more resistant to the denaturation mediated by change in pH and temperature, medium particularly in the presence of water miscible and immiscible organic solvents, detergents, and several kinds of other denaturants...
January 1, 2018: Journal of Nanoscience and Nanotechnology
https://www.readbyqxmd.com/read/29755963/environmental-toxin-screening-using-human-derived-3d-bioengineered-liver-and-cardiac-organoids
#4
Steven D Forsythe, Mahesh Devarasetty, Thomas Shupe, Colin Bishop, Anthony Atala, Shay Soker, Aleksander Skardal
Introduction: Environmental toxins, such as lead and other heavy metals, pesticides, and other compounds, represent a significant health concern within the USA and around the world. Even in the twenty-first century, a plethora of cities and towns in the U.S. have suffered from exposures to lead in drinking water or other heavy metals in food or the earth, while there is a high possibility of further places to suffer such exposures in the near future. Methods: We employed bioengineered 3D human liver and cardiac organoids to screen a panel of environmental toxins (lead, mercury, thallium, and glyphosate), and charted the response of the organoids to these compounds...
2018: Frontiers in Public Health
https://www.readbyqxmd.com/read/29748799/metal-contamination-in-quail-meat-residues-sources-molecular-biomarkers-and-human-health-risk-assessment
#5
Wageh Sobhy Darwish, Amira Samir Atia, Mariam H E Khedr, Walaa Fathy Saad Eldin
Quail meat is an emerging source of high-quality animal protein. Quails are exposed to a wide range of xenobiotics such as heavy metals. In this study, residual concentrations of four toxic metals, of significant public health importance, including cadmium (Cd), lead (Pb), arsenic (As), and nickel (Ni), were determined in edible tissues of quails. In addition, metal loads were measured in water, feed, and litter samples collected from same quail farms as possible sources for quail exposure to heavy metals. The possible use of metallothionein (MT) and heat shock protein 70 (Hsp70) as molecular biomarkers of exposure to heavy metals was further investigated...
May 10, 2018: Environmental Science and Pollution Research International
https://www.readbyqxmd.com/read/29738893/heavy-metal-induced-stress-in-rice-crops-detected-using-multi-temporal-sentinel-2-satellite-images
#6
Meiling Liu, Tiejun Wang, Andrew K Skidmore, Xiangnan Liu
Regional-level information on heavy metal pollution in agro-ecosystems is essential for food security because excessive levels of heavy metals in crops may pose risks to humans. However, collecting this information over large areas is inherently costly. This paper investigates the possibility of applying multi-temporal Sentinel-2 satellite images to detect heavy metal-induced stress (i.e., Cd stress) in rice crops in four study areas in Zhuzhou City, Hunan Province, China. For this purpose, we compared seven Sentinel-2 images acquired in 2016 and 2017 with in situ measured hyper-spectral data, chlorophyll content, rice leaf area index, and heavy metal concentrations in soil collected from 2014 to 2017...
May 5, 2018: Science of the Total Environment
https://www.readbyqxmd.com/read/29678213/biosorption-of-heavy-metals-from-aqueous-solution-by-bacteria-isolated-from-contaminated-soil
#7
Pradeep Dhanwal, Anil Kumar, Shruti Dudeja, Hemlata Badgujar, Rohit Chauhan, Abhishek Kumar, Poonam Dhull, Vinod Chhokar, Vikas Beniwal
  This study was carried out to analyze the heavy metals biosorption potential of bacteria isolated from soil contaminated with electroplating industrial effluents. Bacterial isolates were screened for their multi-metal biosorption potential against copper, nickel, lead, and chromium. Bacterial isolate CU4A showed the maximum uptake of copper, nickel, lead, and chromium in aqueous solution, with a biosorption efficiency of 87.16 %, 79.62%, 84.92%, and 68.12%, respectively. The bacterial strain CU4A was identified as Bacillus cereus, following 16S rRNA gene sequence analysis...
May 1, 2018: Water Environment Research: a Research Publication of the Water Environment Federation
https://www.readbyqxmd.com/read/29656354/distribution-relationship-and-risk-assessment-of-toxic-heavy-metals-in-walnuts-and-growth-soil
#8
Yongxiang Han, Zhanglin Ni, Shiliang Li, Minghua Qu, Fubin Tang, Runhong Mo, Caifen Ye, Yihua Liu
Walnut is one of the most popular nuts worldwide and contains various mineral nutrients. Little is known, however, about the relationship between toxic heavy metals in walnuts and growth soil. In this study, we investigated the distribution, relationship, and risk assessment of five toxic heavy metals-lead (Pb), arsenic (As), chromium (Cr), cadmium (Cd), and mercury (Hg)-in walnuts and growth soil in the main production areas of China. The results showed that the main heavy metal pollution in walnut and soil was Pb and Cd...
April 14, 2018: Environmental Science and Pollution Research International
https://www.readbyqxmd.com/read/29644464/heavy-metal-enrichment-and-ecological-risk-assessment-of-surface-sediments-in-khorramabad-river-west-iran
#9
F Rastmanesh, S Safaie, A R Zarasvandi, M Edraki
The ecological health of rivers has often been threatened in urbanized catchments due to the expansion of industrial activities and the population growth. Khorramabad River which flows through Khorramabad city, west of Iran, is an example of such settings. The river water is used for agricultural purposes downstream. In this study, the effect of Khorramabad city on heavy metal and metalloid (Cu, Pb, Zn, Ni, Cr, and As) loads in Khorramabad River sediments was investigated. To evaluate sediment pollution and potential adverse biological effects, surface sediment samples were collected at selected locations along the river and were characterized for their geochemical properties...
April 11, 2018: Environmental Monitoring and Assessment
https://www.readbyqxmd.com/read/29615394/nephrotoxicity-and-chinese-herbal-medicine
#10
Bo Yang, Yun Xie, Maojuan Guo, Mitchell H Rosner, Hongtao Yang, Claudio Ronco
Chinese herbal medicine has been practiced for the prevention, treatment, and cure of diseases for thousands of years. Herbal medicine involves the use of natural compounds, which have relatively complex active ingredients with varying degrees of side effects. Some of these herbal medicines are known to cause nephrotoxicity, which can be overlooked by physicians and patients due to the belief that herbal medications are innocuous. Some of the nephrotoxic components from herbs are aristolochic acids and other plant alkaloids...
April 3, 2018: Clinical Journal of the American Society of Nephrology: CJASN
https://www.readbyqxmd.com/read/29603103/screening-of-seaweeds-in-the-east-china-sea-as-potential-bio-monitors-of-heavy-metals
#11
Yaoru Pan, Thomas Wernberg, Thibaut de Bettignies, Marianne Holmer, Ke Li, Jiaping Wu, Fang Lin, Yan Yu, Jiang Xu, Chaosheng Zhou, Zhixing Huang, Xi Xiao
Seaweeds are good bio-monitors of heavy metal pollution and have been included in European coastal monitoring programs. However, data for seaweed species in China are scarce or missing. In this study, we explored the potential of seaweeds as bio-monitor by screening the natural occurring seaweeds in the "Kingdom of seaweed and shellfish" at Dongtou Islands, the East China Sea. Totally, 12 seaweed species were collected from six sites, with richness following the sequence of Rhodophyta > Phaeophyta > Chlorophyta...
March 30, 2018: Environmental Science and Pollution Research International
https://www.readbyqxmd.com/read/29584466/characterization-of-coal-fly-ash-and-use-of-plants-growing-in-ash-pond-for-phytoremediation-of-metals-from-contaminated-agricultural-land
#12
Ganesh Chandra Kisku, Vinay Kumar, Pokhraj Sahu, Pramod Kumar, Narendra Kumar
Mobilization of heavy metals around coal power plants due to improper disposal of fly ash (FA) and wastewater have led to release of pollutants into the environment. For protection of inimitable natural resources, application of economical and effective technologies is needed such as phytoremediation is cost-effective, ecofriendly and a better option for elimination of metal from contaminated sites. Twelve plant species were sampled from ash dyke of Singrauli and screened for accumulation of metals for this study...
March 21, 2018: International Journal of Phytoremediation
https://www.readbyqxmd.com/read/29558955/exploring-the-endocrine-activity-of-air-pollutants-associated-with-unconventional-oil-and-gas-extraction
#13
REVIEW
Ashley L Bolden, Kim Schultz, Katherine E Pelch, Carol F Kwiatkowski
BACKGROUND: In the last decade unconventional oil and gas (UOG) extraction has rapidly proliferated throughout the United States (US) and the world. This occurred largely because of the development of directional drilling and hydraulic fracturing which allows access to fossil fuels from geologic formations that were previously not cost effective to pursue. This process is known to use greater than 1,000 chemicals such as solvents, surfactants, detergents, and biocides. In addition, a complex mixture of chemicals, including heavy metals, naturally-occurring radioactive chemicals, and organic compounds are released from the formations and can enter air and water...
March 21, 2018: Environmental Health: a Global Access Science Source
https://www.readbyqxmd.com/read/29557638/surface-fe-ii-fe-iii-cycle-promoted-ultra-highly-sensitive-electrochemical-sensing-of-arsenic-iii-with-dumbbell-like-au-fe-3-o-4-nanoparticles
#14
Shan-Shan Li, Wen-Yi Zhou, Min Jiang, Zheng Guo, Jin-Huai Liu, Lizhi Zhang, Xing-Jiu Huang
Developing a new ultrasensitive interface to detect As(III) is highly desirable because of its seriously toxic and low concentration in drinking water. Recently, Fe3 O4 nanoparticles of high adsorption toward As(III) become very promising to be such an interface, which is still limited by the poor understanding of their surface physicochemical properties. Herein, we report that dumbbell-like Au/Fe3 O4 nanoparticles, when being modified the screen-printed carbon electrode, can serve as an efficient sensing interface for As(III) detection with an excellent sensitivity of 9...
April 3, 2018: Analytical Chemistry
https://www.readbyqxmd.com/read/29555256/preparation-and-standardization-of-mathan-tailam-a-classical-siddha-formulation-for-diabetic-ulcerative-wound-healing
#15
R Arunadevi, R Susila, S Murugammal, S Divya
BACKGROUND: Increasing popularity of Mathan Tailam (mattan tailam, pachai ennai) for the treatment of diabetic foot ulcer necessitated standardization and quality control of this medicated oil both in large scale production and quality check in marketed drug. OBJECTIVE: Present study aims to develop standard operating procedure for the preparation of Mathan Tailam as per Siddha Formulary of India and its standardization using suitable analytical techniques. MATERIALS AND METHODS: Mathan Tailam was prepared as per Siddha Formulary of India...
March 16, 2018: Journal of Ayurveda and Integrative Medicine
https://www.readbyqxmd.com/read/29550436/bioaccumulation-of-cadmium-by-enterobacter-sp-and-enhancement-of-rice-seedling-growth-under-cadmium-stress
#16
Soumik Mitra, Krishnendu Pramanik, Anumita Sarkar, Pallab Kumar Ghosh, Tithi Soren, Tushar Kanti Maiti
Bacteria-mediated plant growth promotion and bioremediation of heavy metal containing soil is a widely accepted eco-friendly method. The present study is aimed to screen out cadmium resistant bacterial strain from metal contaminated rice rhizosphere and evaluate its effects on the growth of rice seedlings under cadmium stress. Among four different isolates (designated as S1, S2, S3 and S5), the S2 isolate was screened on the basis of different PGP traits and multi heavy metal resistance (minimum inhibitory concentration for cadmium, lead and arsenic were 3500, 2500 and 1050 µg/ml respectively)...
July 30, 2018: Ecotoxicology and Environmental Safety
https://www.readbyqxmd.com/read/29536268/plant-growth-promotion-of-miscanthus-%C3%A3-giganteus-by-endophytic-bacteria-and-fungi-on-non-polluted-and-polluted-soils
#17
Christoph Stephan Schmidt, Libor Mrnka, Tomáš Frantík, Petra Lovecká, Miroslav Vosátka
Putative endophytes of Miscanthus × giganteus were isolated, and screened in the laboratory, greenhouse and field for their plant growth promoting properties in this host. Pantoea ananatis and Pseudomonas savastanoi were the predominant bacteria in leaves whereas other pseudomonads prevailed in roots. Almost all fungal endophytes belonged to the Pezizomycotina and most were isolated from roots; Fusarium oxysporum was most abundant, followed by the genera Periconia, Exophiala, Microdochium and Leptodontidium...
March 13, 2018: World Journal of Microbiology & Biotechnology
https://www.readbyqxmd.com/read/29532376/comparative-study-on-the-toxic-effects-of-some-heavy-metals-on-the-nile-tilapia-oreochromis-niloticus-in-the-middle-delta-egypt
#18
Abeer A Alm-Eldeen, Thoria Donia, Salma Alzahaby
Heavy metals are the most dangerous hazards affecting aquatic biota in Egypt specially the Nile Tilapia, Oreochromis niloticus, which is an important species in commercial fisheries. Some areas were not fully studied to screen the hazards that may affect this economic fish. Therefore, the present study aimed to evaluate the potential hazards of heavy metals on O. niloticus in Al-Gharbiya Governorate in the Middle delta of Egypt. Water and fish samples were collected from Al-Qased canal, Kafr El-Zayaat Nile, El-Maash canal in Al-Gharbiya Governorate plus a reference site which is a fish farm at the Faculty of Agriculture, Damietta University, Damitta Governorate, Egypt...
March 12, 2018: Environmental Science and Pollution Research International
https://www.readbyqxmd.com/read/29455259/influence-of-zn-ii-stress-induction-on-component-variation-and-sorption-performance-of-extracellular-polymeric-substances-eps-from-bacillus-vallismortis
#19
Peifei Ding, Weifeng Song, Ziheng Yang, Jingyi Jian
Bacillus vallismortis (B. vallismortis), an aerobic heterotrophic bacteria, was screened in a laboratory pilot study, to assess the interaction between the heavy metal Zn(II) and extracellular polymeric substances (EPS). The influence of Zn(II) stress on EPS production, component variation, and sorption performance, was investigated. The characteristics of B. vallismortis EPS formed under stress were analyzed using FTIR, 3D-EEM and XPS. EPS was used as an adsorbent and the adsorption capacity and adsorption behavior of EPS formed with and without Zn(II) stress, were compared and assessed...
February 17, 2018: Bioprocess and Biosystems Engineering
https://www.readbyqxmd.com/read/29454247/tolerance-and-growth-kinetics-of-bacteria-isolated-from-gold-and-gemstone-mining-sites-in-response-to-heavy-metal-concentrations
#20
Oluwatosin Gbemisola Oladipo, Obinna Tobechukwu Ezeokoli, Mark Steve Maboeta, Jacobus Johannes Bezuidenhout, Louwrens R Tiedt, Anine Jordaan, Cornelius Carlos Bezuidenhout
Response and growth kinetics of microbes in contaminated medium are useful indices for the screening and selection of tolerant species for eco-friendly bio-augmentative remediation of polluted environments. In this study, the heavy metal (HM) tolerance, bioaccumulation and growth kinetics of seven bacterial strains isolated from mining sites to 10 HMs (Cd, Hg, Ni, Al, Cr, Pb, Cu, Fe, Mn and Zn) at varied concentrations (25-600 mgL-1 ) were investigated. The isolates were phylogenetically (16S rRNA gene) related to Lysinibacillus macroides, Achromobacter spanius, Bacillus kochii, B...
April 15, 2018: Journal of Environmental Management
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