45414

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A liquid chromatography-tandem mass spectrometry method for the detection of economically motivated adulteration in protein-containing foods.

Shaun MacMahon et al.

Journal of chromatography. A, 1220, 101-107 (2011-12-27)

A new analytical method was developed to determine the presence of six (6) compounds with the potential to be used in economic adulteration to enhance the nitrogen content in milk products and bulk proteins. Residues were extracted from the matrix

Determination of residues of cyromazine and its metabolite, melamine, in animal-derived food by gas chromatography-mass spectrometry with derivatization.

Xinle Zhu et al.

Journal of agricultural and food chemistry, 57(23), 11075-11080 (2009-11-11)

A gas chromatography-mass spectrometric (GC-MS) method was established for the determination of cyromazine and its metabolite, melamine, in animal-derived food. Chicken and tilapia muscle samples were spiked with (15)N(3)-melamine, extracted with an acidic acetonitrile/water solution, and defatted with dichloromethane. Egg

Putative polymerase chain reaction markers for insecticide resistance in the leafminer Liriomyza trifolii (Diptera: Agromyzidae) to cyromazine and abamectin.

Scott Ferguson et al.

Journal of economic entomology, 103(6), 2197-2203 (2011-02-12)

In this study, random amplified polymorphic DNA polymerase chain reaction (RAPD-PCR) was used to identify polymorphic genomic DNA that would discriminate among cyromazine-resistant, abamectin-resistant, and susceptible Liriomyza trifolii (Burgess) (Diptera: Agromyzidae) leafminers. Using a reference strain that was susceptible to

[Adsorption of cyromazine on five typical soils in China].

Ling-li Tang et al.

Huan jing ke xue= Huanjing kexue, 30(10), 3072-3076 (2009-12-09)

Batch equilibrium experiments were used to reveal cyromazine adsorption on five kinds of soils, namely Ali-Perudic Ferrosols collected from Yingtan of Jiangxi, Udic Argosols collected from Nanjing and Gleyic-Stagnic Anthrosols collected from Changshu of Jiangsu, Ustic Cambosols collected from Fengqiu

[Determination of residues of cyromazine and its metabolite melamine in chickens by gas chromatography-mass spectrometry].

Xinle Zhu et al.

Se pu = Chinese journal of chromatography, 27(4), 401-405 (2009-11-27)

A gas chromatography-mass spectrometric (GC-MS) method has been established for the determination of cyromazine and its metabolite melamine in chickens. The homogenized tissue samples added with melamine-15N3 were extracted with acidic acetonitrile-water solution, and defatted with dichloromethane. The samples were

Inheritance mode, cross-resistance and realized heritability of pyriproxyfen resistance in a field strain of Musca domestica L. (Diptera: Muscidae).

Rizwan Mustafa Shah et al.

Acta tropica, 142, 149-155 (2014-12-06)

Pyriproxyfen is a growth regulator used for the control of different insect pests, including Musca domestica. To assess the risk of resistance and to develop a strategy for resistance management, a field strain of M. domestica was exposed to pyriproxyfen

A novel colloidal gold-based lateral flow immunoassay for rapid simultaneous detection of cyromazine and melamine in foods of animal origin.

Tao Le et al.

Food chemistry, 138(2-3), 1610-1615 (2013-02-16)

A rapid and sensitive lateral flow immunoassay (LFIA) based on competitive format was developed and validated for simultaneous detection of cyromazine (CA) and melamine (MA) in foods of animal origin. With this method, the cut-off value for the two test

First report of cyromazine resistance in a population of UK house fly (Musca domestica) associated with intensive livestock production.

Howard A Bell et al.

Pest management science, 66(7), 693-695 (2010-06-10)

House fly control in livestock-rearing facilities is heavily reliant on the use of the larvicide cyromazine. While extensive use of this compound has led to the development of resistance in several countries, no elevated tolerance has so far been reported

Validation of a rapid method of analysis using ultrahigh-performance liquid chromatography - tandem mass spectrometry for nitrogen-rich adulterants in nutritional food ingredients.

Jon Draher et al.

Journal of chromatography. A, 1373, 106-113 (2014-12-02)

A method for the rapid quantification of 9 potential nitrogen-rich economic adulterants (dicyandiamide, urea, biuret, cyromazine, amidinourea, ammeline, amidinourea, melamine, and cyanuric acid) in five milk and soy derived nutritional ingredients, i.e. whole milk powder, nonfat dry milk, milk protein

Molecularly-imprinted microspheres for selective extraction and determination of melamine in milk and feed using gas chromatography-mass spectrometry.

Mu Li et al.

Journal of chromatography. B, Analytical technologies in the biomedical and life sciences, 878(25), 2333-2338 (2010-08-03)

Molecularly-imprinted polymers in the form of microspheres were synthesized using the dispersion polymerization protocol; cyromazine was used as dummy template, while methacrylic acid, ethylene glycol dimethacrylate and acetonitrile (MeCN) were used as functional monomer, cross-linker, and porogen, respectively. When compared

Rapid and selective screening of melamine in bovine milk using molecularly imprinted matrix solid-phase dispersion coupled with liquid chromatography-ultraviolet detection.

Hongyuan Yan et al.

Journal of chromatography. B, Analytical technologies in the biomedical and life sciences, 908, 137-142 (2012-10-09)

A simple, convenient and high selective molecularly imprinted matrix solid-phase dispersion (MI-MSPD) using water-compatible cyromazine-imprinted polymer as adsorbent was proposed for the rapid screening of melamine from bovine milk coupled with liquid chromatography-ultraviolet detection. The molecularly imprinted polymers (MIPs) synthesized

Response to laboratory selection with cyromazine and susceptibility to alternative insecticides in sheep blowfly larvae from the New South Wales Monaro.

G W Levot

Australian veterinary journal, 91(1-2), 61-64 (2013-01-30)

To determine the significance of cyromazine resistance in blowfly larvae from a region where resistance has been previously confirmed and to measure susceptibility of the cyromazine-resistant blowflies to ivermectin and spinosad. Blowfly larvae from five properties located within 5 km

Determination of cyromazine and melamine in chicken eggs using quick, easy, cheap, effective, rugged and safe (QuEChERS) extraction coupled with liquid chromatography-tandem mass spectrometry.

Pei-Cheng Wang et al.

Analytica chimica acta, 752, 78-86 (2012-10-30)

A rapid and sensitive method has been developed for the simultaneous detection of cyromazine and melamine in chicken eggs using the quick, easy, cheap, effective, rugged and safe (QuEChERS) method coupled with liquid chromatography-tandem mass spectrometry (LC-MS/MS). The optimal extraction

Preparation of a magnetic molecularly imprinted polymer with pseudo template for rapid simultaneous determination of cyromazine and melamine in bio-matrix samples.

Xianhua Wang et al.

Analytical and bioanalytical chemistry, 404(5), 1555-1564 (2012-07-24)

A magnetic molecularly imprinted polymer (M-MIP) for cyromazine and melamine was prepared by simple suspension polymerization using a pseudo template, 2-(4,6-diamino-1,3,5-triazin-2-ylamino)ethanethiol disulfide. The M-MIP was characterized by scanning electron microscopy, Fourier-transform infrared spectroscopy, and vibrating sample magnetometry. Molecular recognition properties

Effective separation and sensitive determination of cyanuric acid, melamine and cyromazine in environmental water by reversed phase high-performance liquid chromatography.

Hanwen Sun et al.

Environmental technology, 32(3-4), 317-323 (2011-07-26)

A new method for the simultaneous determination of cyanuric acid (CA), melamine (MM) and cyromazine (CM) in different water samples was developed by using reversed phase high-performance liquid chromatography diode-array detection (RP-HPLC-DAD). The conditions of HPLC were investigated and optimized.

Effective separation and simultaneous detection of cyromazine and melamine in food by capillary electrophoresis.

Hanwen Sun et al.

Electrophoresis, 31(13), 2236-2241 (2010-07-02)

A novel and simple method was, for the first time, developed for effective separation and sensitive detection of cyromazine (CM) and its metabolite melamine (MM) by CZE with DAD (CZE-DAD). Among different solvents, ACN containing 20% NH(4)OH was found to

Species displacements are common to two invasive species of leafminer fly in China, Japan, and the United States.

Yulin Gao et al.

Journal of economic entomology, 104(6), 1771-1773 (2012-02-04)

Under field conditions, species displacements have occurred in different directions between the same invasive species of leafminers (Diptera: Agromyzidae). Liriomyza sativae (Blanchard) was displaced by L. trifolii (Burgess) in the western United States, with evidence suggesting that lower insecticide susceptibility

High-performance liquid chromatographic method for the determination of cyromazine and melamine residues in milk and pork.

Ruicheng Wei et al.

Journal of chromatographic science, 47(7), 581-584 (2009-09-24)

A high-performance liquid chromatography method is described in this paper. The method uses NH(2) column and 97% acetonitrile eluate to determine the insecticide cyromazine and metabolite melamine residues in milk and pork. Samples were treated with NaOH and extracted with

Molecularly imprinted monolith coupled on-line with high performance liquid chromatography for simultaneous quantitative determination of cyromazine and melamine.

Shanshan Wang et al.

The Analyst, 136(18), 3672-3679 (2011-07-26)

We report a novel method for simultaneous determination of cyromazine and melamine based on a molecularly imprinted monolith on-line coupled with high performance liquid chromatography (HPLC). The imprinted monolith was prepared by in situ polymerization using 2,4-diamino-6-undecyl-1,3,5-triazine (DAUTA) as a

Efficacy of cyromazine to control immature stable flies (Diptera: Muscidae) developing in winter hay feeding sites.

D B Taylor et al.

Journal of economic entomology, 105(2), 726-731 (2012-05-23)

Hay mixed with manure and urine residues at sites where hay has been provided as supplemental winter feed for cattle provide an excellent substrate for the development of immature stable flies, Stomoxys calcitrans (L.). Such sites are primary sources of

Analysis of cyromazine in poultry feed using the QuEChERS method coupled with LC-MS/MS.

Kang Xia et al.

Journal of agricultural and food chemistry, 58(10), 5945-5949 (2010-02-17)

Cyromazine is used as an additive in poultry feed to inhibit the development of fly larvae in chicken manure. U.S. Environmental Protection Agency (EPA) method AG-555, modified from method AG-376, has been the standard method for cyromazine analysis in poultry

Development of a high performance liquid chromatography method and a liquid chromatography-tandem mass spectrometry method with pressurized liquid extraction for simultaneous quantification and confirmation of cyromazine, melamine and its metabolites in foods of animal origin.

Huan Yu et al.

Analytica chimica acta, 682(1-2), 48-58 (2010-11-09)

Simple and sensitive methods have been developed for simultaneous detection of cyromazine, melamine and their metabolites (ammeline, ammelide and cyanuric acid) in samples of animal origins. These include a high performance liquid chromatography (HPLC) method and a liquid chromatography-tandem mass

Insecticide-mediated apparent displacement between two invasive species of leafminer fly.

Yulin Gao et al.

PloS one, 7(5), e36622-e36622 (2012-06-05)

Closely related invasive species may often displace one another, but it is often difficult to determine mechanisms because of the historical nature of these events. The leafmining flies Liriomyza sativae and Liriomyza trifolii have become serious invasive agricultural pests throughout

The application of pseudo template molecularly imprinted polymer to the solid-phase extraction of cyromazine and its metabolic melamine from egg and milk.

Xianhua Wang et al.

Journal of separation science, 35(12), 1432-1438 (2012-06-29)

The combination of molecularly imprinted polymer with high performance liquid chromatography has been developed to determine cyromazine and its metabolic melamine in some samples. However, the potential risk of template leakage used in molecularly imprinted polymer is a major disadvantage.

High-resolution structures of Trypanosoma brucei pteridine reductase ligand complexes inform on the placement of new molecular entities in the active site of a potential drug target.

Alice Dawson et al.

Acta crystallographica. Section D, Biological crystallography, 66(Pt 12), 1334-1340 (2010-12-03)

Pteridine reductase (PTR1) is a potential target for drug development against parasitic Trypanosoma and Leishmania species. These protozoa cause serious diseases for which current therapies are inadequate. High-resolution structures have been determined, using data between 1.6 and 1.1 Å resolution, of

Determination of cypromazine and its metabolite melamine in milk by cation-selective exhaustive injection and sweeping-capillary micellar electrokinetic chromatography.

Xuegang Li et al.

Journal of separation science, 34(3), 323-330 (2011-01-27)

In this study, we described a high-sensitive on-line preconcentration method for cypromazine (CYP) and melamine (MEL) analysis using cation-selective exhaustive injection (CSEI) combined with sweeping-MEKC. The optimum conditions of on-line concentration and separation were discussed. The BGE contained 100 mM SDS

Cyromazine resistance detected in Australian sheep blowfly.

G W Levot

Australian veterinary journal, 90(11), 433-437 (2012-10-31)

To investigate the cause of cyromazine failure to protect lambs from flystrike. Lucilia cuprina larvae from a Nimmitabel (New South Wales) population associated with failure of a cyromazine spray-on to protect lambs from flystrike were compared with larvae from a

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