نتایج جستجو برای: mercury hygiene

تعداد نتایج: 65017  

Ali Akbar Velayati Ali Eslamifar Amitis Ramezani, Arezoo Aghakhani, Latif Gachkar Mohammad Amin Faghih Mohammad Banifazl Mohammad Rabbani Zahra Pournasiri

  ABSTRACT Background and Objective: There have been concerns over possible association between mercury and neurodevelopmental outcomes in infants. In this study we aimed to determine whether blood levels of mercury are above safe values in Iranian infants or not. Materials and Methods:  A total of 85 infants (0, 2, 4 and 6 months old) were enrolled in this study. All of them received vaccin...

Sama Cheraghi Seyed Ali Jafari

In the present study, the capability of dried indigenous biomass of Vibrio and Oceanimonas, was assessed and compared for mercury biosorption from aqueous solutions. It was found that both of the biosorbents reached equilibrium after 60 min of contact although the mercury sorption capacity of Vibrio was significantly more. Its sorption capacity increased from 9 to 83 ...

2015
Kirstin Ross John Edwards

Mercury concentration in the muscular tissue of farmed southern bluefin tuna, Thunnus maccoyii (SBT) is known to vary. Data suggests that mercury concentration is negatively correlated with the lipid concentration of tissues. Those areas that accumulate higher levels of lipid are noted to have a lower mercury concentration than lean tissues. Here we further delineate variation in mercury concen...

Journal: :Biochemical Society transactions 2002
A M M Essa L E Macaskie N L Brown

Mercury is one of the most toxic heavy metals, and has significant industrial and agricultural uses. These uses have led to severe localized mercury pollution. Mercury volatilization after its reduction to the metallic form by mercury-resistant bacteria has been reported as a mechanism for mercury bioremediation [Brunke, Deckwer, Frischmuth, Horn, Lunsdorf, Rhode, Rohricht, Timmis and Weppen (1...

Journal: :Archives of environmental contamination and toxicology 2009
Alexander L Bond Antony W Diamond

Seabirds are used frequently as indicators of mercury contamination in marine ecosystems, but few studies have examined the forms of mercury found in seabird tissues. Here we compare concentrations of total and organic mercury in feathers (n=5) of six sympatric nesting seabirds and in egg components of Leach's storm-petrels from Machias Seal Island, New Brunswick, Canada, during the 2006 breedi...

ژورنال: سلامت و محیط زیست 2014
زارع, شهناز, کبودوندپور, شهرام,

Background and Objectives: Due to the importance of Sanandaj Gheshlagh Reservoir (SGR) in the region and proven mercury pollution in SGR water, a research project was carried out to determine the amount of mercury concentration and bioaccumulation and its behavior through a food route in SGR food chain (i.e., water, sediments, fish, and human).This was done, because it has been reported that me...

2011
Oscar N Ruiz Derry Alvarez Gloriene Gonzalez-Ruiz Cesar Torres

BACKGROUND The use of transgenic bacteria has been proposed as a suitable alternative for mercury remediation. Ideally, mercury would be sequestered by metal-scavenging agents inside transgenic bacteria for subsequent retrieval. So far, this approach has produced limited protection and accumulation. We report here the development of a transgenic system that effectively expresses metallothionein...

2000
Dean W. Boening

Mercury at low concentrations represents a major hazard to microorganisms. Inorganic mercury has been reported to produce harmful e€ects at 5 lg/l in a culture medium. Organomercury compounds can exert the same e€ect at concentrations 10 times lower than this. The organic forms of mercury are generally more toxic to aquatic organisms and birds than the inorganic forms. Aquatic plants are a€ecte...

Journal: :Environmental science & technology 2011
Chase A Gerbig Christopher S Kim John P Stegemeier Joseph N Ryan George R Aiken

Direct determination of mercury (Hg) speciation in sulfide-containing environments is confounded by low mercury concentrations and poor analytical sensitivity. Here we report the results of experiments designed to assess mercury speciation at environmentally relevant ratios of mercury to dissolved organic matter (DOM) (i.e., <4 nmol Hg (mg DOM)(-1)) by combining solid phase extraction using C(1...

Journal: :Comparative biochemistry and physiology. Toxicology & pharmacology : CBP 2008
Paul E Drevnick Aaron P Roberts Ryan R Otter Chad R Hammerschmidt Rebecca Klaper James T Oris

Many laboratory studies have documented that mercury can be toxic to fish, but it is largely unknown if mercury is toxic to fish in their natural environments. The objective of our study was to investigate the toxic effects of mercury on northern pike (Esox lucius) at Isle Royale, Michigan. In 124 northern pike from eight inland lakes, concentrations of total mercury in skin-on fillets ranged f...

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