Search Results - "chromatography"

Multiresidue method for trace pesticide analysis in honeybee wax comb by GC-QqQ-MS by Gil García, M.D., Uclés, Samanta, Lozano Fernández, A.B., Sosa, Alexis Lionel, Rodríguez Fernández-Alba, Amadeo

“…This method of analysis applied gas chromatography coupled to a triple quadrupole mass spectrometer for the quantitative analysis of pesticide residues. …”
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Peptidase in the plasma of mice infected with Trypanosoma brucei brucei by Knowles, G., Black, Samuel J., Whitelaw, D.D.

“…The molecular weight of this enzyme in either parasite lysate or plasma from infected mice was approximately 40000 Da when assayed on a size exclusion column using high-performance liquid chromatography. The enzyme can cleave the dipeptides leu-ala, val-leu and pro-leu, but not the dipeptide phe-ala. …”
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Bovine stem cell factor: Production of a biologically active protein and mRNA analysis in cattle infected with Trypanosoma congolense by Mertens, B., Muriuki, C., Muiya, P., Andrianarivo, A., Mwangi, S., Logan-Henfrey, L.L.

“…The protein was purified from the inclusion bodies in one step by metal chelation chromatography under denaturing conditions. Recombinant bovine SCF was shown to act synergistically with interleukin 3 (IL-3) and erythropoietin (EPO) in stimulating the growth of bone marrow progenitor cells such as colony forming units-granulocyte macrophage (CFU-GM) and burst forming units-erythroid (BFU-E). …”
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The use of HPLC-derived phenolic profiles as a means of classifying Sesbania accessions by Plumb, V.E., Wood, C.D., Gay, C., Hanson, Jean, Heering, J.H.

“…Aqueous acetone extracts of mature leaves from 10 accessions of two species of Sesbania plants were prepared and anlysed by high-performance liquid chromatography (HPLC). The HPLC phenolic profiles were used to develop a classification rule to distinguish between accessions. …”
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Low cost and state of the art methods to measure nitrous oxide emissions by Hensen A, Skiba U, Famulari D

“…Traditionally such small increases are measured by chambers and analyzed by gas chromatography. Spatial and temporal resolution is poor, but costs are low. …”
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Occurrence of regulated mycotoxins and other microbial metabolites in dried cassava products from Nigeria by Abass, A., Awoyale, W., Sulyok, M., Alamu, Emmanuel Oladeji

“…With the use of liquid chromatography tandem-mass spectrometry (LC-MS/MS) for the constituent analysis, a few major mycotoxins (aflatoxin B1 and G1, fumonisin B1 and B2, and zearalenone) regulated in food crops by the Commission of the European Union were found at concentrations which are toxicologically acceptable in many other crops. …”
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One and two dimensional gel electrophoresic identification of African yam bean (Sphenostylis stenocarpa) seed proteins by Machuka, J., Okeola, O.

“…One- and two-dimensional polyacrylamide gel electrophoresis was then used to analyze the albumin fraction, galactose-specific lectins purified on immobilized galactose−Sepharose 4B, and abundant non-lectin seed proteins left over following affinity chromatography. N-terminal sequencing of prominently resolved polypetide bands led to identification of proteins having sequence homology with characterized legume seed proteins, namely, mung bean seed albumin, pea α-fucosidase, soybean Kunitz-type trypsin inhibitor, an endochitinase, pea pathogenesis-related protein, and/or cowpea seed storage proteins. …”
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Pelagic fish oil : methods for extraction and purification by Näsbom, Linda

“…Urea fractionation, chromatography and molecular distillation are methods to concentrate the refined oil.…”

Identification of proteins expressed by the root-rot fungus Heterobasidion annosum when growing on lignocellulose by Wang, Xiaoyu

“…Extracellular proteins from one culture with spruce as carbon source were detected in electrophoresis after separation by cation and anion exchange chromatography. Proteins were identified by tryptic peptide mapping using MALDI-TOF mass spectrometry. …”

Proteomic and metabolomic profiling of Valencia orange fruit after natural frost exposure by Perotti, Valeria Elisa, Moreno, Alejandra Soledad, Tripodi, Karina Eva Josefina, Meier, Guillermo Enrique, Bello, Fernando, Cocco, Mariángeles, Vazquez, Daniel Eduardo, Anderson, Catalina Margarita, Podesta, Florencio Esteban

“…Also, primary and secondary metabolites relative contents were analyzed in both tissues by gas chromatography‐mass spectrometry and liquid chromatography‐mass spectrometry, respectively. …”
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Fatty acid composition and insect resistance in Vigna unguiculata seeds by Piergiovanni, A.R., Della Gatta, C.D., Ng, N.Q., Singh, B.B., Singh, S.R., Perrino, P.

“…Fatty acid composition of extracted oils from 58 lines of cowpea (Vigna unguicuiata (L) Walp) was investigated by gas‐liquid chromatography (GLC). Considerable variability was observed in the fatty acid profile, though palmitic (16:0), linoleic (18:2) and linolenic (18:3) acids were the dominant components in each line. …”
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Isolation and characterization of tannin-degrading bacteria from faecal samples of some wild ruminants in Ethiopia by Ephraim, E., Odenyo, A.A., Ashenafi, M.

“…Mixed cultures of the samples were screened for their tannin-hydrolysing capacities by thin layer chromatography (TLC). Twelve bacterial isolates with the ability to hydrolyse tannin were characterized morphologically, physiologically and by restriction fragment length polymorphism (RFLP) of the 16S rRNA genes of the isolates. …”
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Contamination of dining tables with pesticides in Kibrigwi irrigation scheme by Kimani, V.W., McDermott, John J.

“…In the laboratory, the residuals chemicals extracted from these swabs using conventional residue analysis procedures and the extracts were analysed by gas liquid chromatography. Information on which pesticide (s) were recently handled in the home and when, were also recorded. …”
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Changes in scopoletin concentration in cassava chips from four varieties during storage by Gnonlonfin, G.J.B., Gbenou, J.D., Sanni, A., Brimer, L.

“…Kpaki kpika, Kpaki soan, Logoguesse kotorou and BEN 86052, was investigated by high-performance liquid chromatography (HPLC). RESULTS: Presence was shown in all four varieties with a mean in fresh roots between 4.1 and 11.1 mg kg(-1) dry weight. …”
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Effect of packaging materials and storage conditions on the degradation of xanthophylls in yellow-maize ogi powder by Awoyale, W., Maziya-Dixon, B.B., Alamu, Emmanuel Oladeji, Menkir, A.

“…The samples were stored under different conditions for 12 weeks and sampled at three-week intervals for analysis using High Performance Liquid Chromatography. The result showed that the total xanthophyll content of the ogi powder was 10.39 µg/g before storage with of zeaxanthin having the highest value (6.73 µg/g) and lutein (3.66 µg/g) the least. …”
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Potassium Sorbate Residue Levels and Persistence in Citrus Fruit as Detected by a Simple Colorimetric Method by Montesinos-Herrero, Clara, Smilanick, Joseph L., Hurley, J. Michael, Palou, Lluís

“…Potassium sorbate residues determined by this method and a standard high-performance liquid chromatography (HPLC) method were similar. Residues were proportionate to the potassium sorbate concentration in the treatment solution. …”
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Occurrence and concentration of agricultural phytosanitary residues in bivalve mollusks collected from Golfo Nuevo, Argentina by Frydman, Camila Ayelén, Gonzalez, Cintia Natalia, Pesquero, Natalia, Ruiz, María Juana, Barbieri, Elena Susana, Mozgovoj, Marina Valeria, Cristos, Diego Sebastian

“…Extracts were subsequently analyzed by liquid chromatography–mass spectrometry (LC–MS) and gas chromatography–mass spectrometry (GC–MS). …”
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Itrakonazol till häst by Sonesson, Eva

“…Bloodsamples were collected for 71 hours and serum analyses of itraconazole were made by high performance liquid chromatography (HPLC). Pharmacokinetic parameters obtained in this study indicate that itraconazole, from a pharmacokinetic aspect, is suitable for treatment of equine mycosis, considering the long treatment often required. …”
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Enkel intravenös administrering av trimetoprim-sulfadiazin hos neonatala föl by Hjalmarson Vertovec, Romana

“…Blood samples were collected serially during a 24 hour period and plasma concentrations of TMP and SDZ were determined by liquid chromatography tandem mass spectrometry (LCMSMS). The pharmacokinetic parameters of TMP and SDZ from the foals were compared to published data for adult horses. …”
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A large-scale metabolomics study to harness chemical diversity and explore biochemical mechanisms in ryegrass by Subbaraj, A.K., Huege, J., Fraser, K., Cao, M., Rasmussen, S., Faville, M., Harrison, S.J., Jones, Christopher S.

“…We conducted a large-scale metabolomics study of perennial ryegrass comprising 715 genotypes, representing 118 populations from 21 countries. Liquid/gas chromatography–mass spectrometry based targeted and non-targeted techniques were used to analyse fructan oligosaccharides, lipids, fatty acid methyl esters, polar and semi-polar compounds. …”
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