TITLE

Tyrosinase inhibition organic phase biosensor for triazinic and benzotriazinic pesticide analysis (part two)

AUTHOR(S)
Campanella, L.; Dragone, R.; Lelo, D.; Martini, E.; Tomassetti, M.
PUB. DATE
February 2006
SOURCE
Analytical & Bioanalytical Chemistry;Feb2006, Vol. 384 Issue 4, p915
SOURCE TYPE
Academic Journal
DOC. TYPE
Article
ABSTRACT
Several triazine pesticides, such as atrazine, are much more soluble in several organic solvents, such as chloroform, than in water. Our recent research was aimed at analyzing this class of pesticides using tyrosinase OPEE (organic phase enzyme electrodes), exploiting their inhibiting action on the tyrosinase enzyme when operating in water-saturated chloroform medium. In this work we studied the response of a tyrosinase inhibition enzyme sensor to several triazinic (simazine, propazine, terbuthylazine) and benzotriazinic (azinphos-ethyl and azinphos-methyl) pesticides (LOD=0.5×10−9 mol l−1). Recovery trials were also performed in vegetal matrixes (corn, barley, lentils). Lastly, the effect of the solvent (chloroform or water) on the inhibition process was investigated via Hill’s equation and the diffusion of analyte from the solvent to the enzyme membrane.
ACCESSION #
21909037

 

Related Articles

  • Assessing the Impact of Educating Growers about Proper Use of Atrazine in Pesticide Applicator Recertification Programs. Nice, Glenn R. W.; Whitford, Fred; Johnson, Bill; Janssen, Cheri // Weed Technology;Apr-Jun2008, Vol. 22 Issue 2, p326 

    Indiana growers who purchase restricted-use pesticides are required to show the agrochemical dealer their private pesticide applicator license before the transaction can be completed. To keep the license current, growers may attend three private applicator recertification meetings or retake the...

  • Atrazine still standing despite continuing attacks. HAIRE, BRAD // Carolina Virginia Farmer;Jan2013, Vol. 31 Issue 1, p20 

    The article reports on the findings regarding the risk assessment of atrazine which is considered as one of the safer farm chemicals in the U.S. in 2013.

  • High-performance surface-enhanced Raman scattering sensors based on Ag nanoparticles-coated Si nanowire arrays for quantitative detection of pesticides. Wang, X. T.; Shi, W. S.; She, G. W.; Mu, L. X.; Lee, S. T. // Applied Physics Letters;2/1/2010, Vol. 96 Issue 5, p053104 

    A surface-enhanced Raman scattering (SERS) sensor made of Ag nanoparticles-coated Si nanowire (SiNW) arrays was fabricated for the quantitative detection of Carbaryl (an important nitrogen pesticide). H-terminated SiNWs were capable of reducing silver ions, leading to uniform deposition of...

  • 8-Minute Dual Column Analysis of Organochlorine Pesticides Using Rtx-CLPesticides/Rtx-CLPesticides2 Columns. Thomas, Jason // LC-GC North America;Jun2007 Application Notebook Suppl, Vol. 25, p31 

    The article offers information about the Rtx-CLPesticides phase and the Rtx-CL Pesticides2 phase, two proprietary phases used for the analysis of organochlorine pesticides. The author noted that the phases requires separation of 20 organochlorine pesticides. It also ensures baseline resolution...

  • lixiviation.  // Taber's Cyclopedic Medical Dictionary (2009);2009, Issue 21, p1358 

    A definition of the term "lixiviation," which refers to leaching, is presented.

  • Synthesis of Magnolignan, a New Pigment Lightening Component, via a Suzuki-Miyaura Reaction. Shuhei Narita; Tetsuhiro Ogura; Toyonobu Usuki // Journal of Chemistry;2013, p1 

    Magnolignan, 2,2'-dihydroxy-5,5'-dipropyl-biphenyl (1), is a down-regulator of melanin synthesis that inhibits the maturation of tyrosinase. In this study, a concise total synthesis of 1 was achieved in five steps with 50% overall yield starting from commercially available trans-anethole (2) via...

  • What's in its place?  // Crops;10/18/2003, p5 

    News that the European Union (EU) is likely to accept a proposal to disallow re-registration of atrazine and simazine subject to a derogation for essential uses, will be of concern to growers. The essential uses applied for by the PSD should allow use of simazine on field beans and atrazine on...

  • Water-soluble pesticides in finished water of community water supplies. Coupe, Richard H.; Blomquist, Joel D. // Journal: American Water Works Association;Oct2004, Vol. 96 Issue 10, p56 

    To evaluate the effect of the treatment process on pesticide concentration, source water and finished (treated) water samples were collected from 12 community water systems (CWSs) and analyzed for water-soluble pesticides. The pesticides most frequently detected in the source water were the...

  • HERBICIDE HELPER.  // Technology Review;Nov2004, Vol. 107 Issue 9, p14 

    This article describes a chemical that could help farmers cut down on the hundreds of millions of kilograms of herbicide they spray on their fields each year. Developed by researchers at the University of Texas at Austin, the chemical, which would be combined with a conventional herbicide,...

Share

Read the Article

Courtesy of THE LIBRARY OF VIRGINIA

Sorry, but this item is not currently available from your library.

Try another library?
Sign out of this library

Other Topics