Materias
(35)
documento electrónico
Article : texto impreso
UCAR, G. ; STACCIOLI, C.G. ; STOLL, M. |Dos tallos bien preservados del fósil Sequoiadendron giganteum excavados en Turquía fueron estudiados utilizando el microscopio electrónico y métodos químicos. El análisis químico incluyó la determinación de los constituyentes principales (ligni[...]documento electrónico
DANIEL BURKE, Autor ; LINDSEY MACKAY, Autor | 2008Highly accurate measurements of the amount of substance of organic molecules in a test material can be obtained using exactly matched calibration solutions and internal standards that are labeled with stable isotope atoms by measuring the amount[...]Article : texto impreso
La madera fósil de la mina de lignito de S. Barbara ( cuenca del Arno, Italia ) fué investigada para hallar su contenido de terpenos. Se hizo la comparación con las muestras de la misma mina, recientemente identificadas como Taxodioxylon gypsace[...]texto impreso
ISABELLE SCHMITZ-AFONSO, Autor ; JORGE E. LOYO-ROSALES, Autor ; MARIA DE LA PAZ AVILES, Autor ; BARNETT A. RATTNER, Autor ; CLIFFORD P. RICE, Autor | 2003A quantitative method for the simultaneous determination of octylphenol, nonylphenol and the corresponding ethoxylates (1 to 5) in biota is presented. Extraction methods were developed for egg and fish matrices based on accelerated solvent ext[...]Article : texto impreso
Un método de cromatografía de gases/ espectrometría de masas (GC/MS) ha sido desarrollado para permitir la determinación del contenido de antraquinona de pulpas, papeles, y licores. Un extracto en cloroformo concentrado conteniendo antraquinona [...]documento electrónico
LUKAS TAUJENIS, Autor ; VILMA OLSAUSKAITE, Autor ; AUDRIUS PADARAUSKAS, Autor | 2014texto impreso
Hepatotoxic microcystins (MCs) are the most commonly reported cyanotoxins in eutrophic freshwaters. In 1996, human intoxications by MCs caused deaths of 76 patients at Caruaru dialysis centers in Brazil. So far, there have been no direct evidenc[...]texto impreso
documento electrónico
TAO PANG, Autor ; Z. YUAN, Autor ; Y. DAI, Autor ; CH. WANG, Autor ; J. YANG, Autor ; L. PENG, Autor ; GUOWANG XU, Autor | 2007HPLC-atmospheric pressure chemical ionization MS (HPLC-APCI-MS) was used to screen and identify glycosides in tobacco leaf. MS/MS and MS3 and photodiode array (PDA) detection were also used in the characterization. A total of 12 glycosides were [...]texto impreso
documento electrónico
KAREN W. PHINNEY, Autor ; RIMMER, CATHERINE, Autor ; JEANICE BROWN THOMAS, Autor ; SANDER, LANE C., Autor ; SHARPLESS, KATHERINE E., Autor ; WISE, STEPHEN A., AutorVitamins are essential to human health, and dietary supplements containing vitamins are widely used by individuals hoping to ensure they have adequate intake of these important nutrients. Measurement of vitamins in nutritional formulations is ne[...]texto impreso
J. IGNACIO GARCIA ALONSO, Autor ; PABLO RODRÍGUEZ GONZÁLEZ, Autor | Cambridge [REINO UNIDO] : Royal Society of Chemistry | 2013Isotope Dilution Mass Spectrometry (IDMS) has become an essential tool in research laboratories and is increasingly used in routine analysis labs (including environmental, food safety and clinical applications). This is the first textbook to pre[...]documento electrónico
In this book, I have tried to show the way in which high performance liquid chromatography–mass spectrometry (LC–MS) has developed, somewhat slowly it has to be said, into a powerful hybrid analytical technique.In the first chapter, I have discu[...]documento electrónico
C. M. COMPADRE, Autor ; R. A. HUSSAIN, Autor ; N. P. NANAYAKKARA, Autor ; J. M. PEZZUTO, Autor ; A. D. KINGHORN, Autor | 1988Steviol (ent-13-hydroxykaur-16-en-19-oic acid), the aglycone of various plant-derived glycoside sweeteners consumed by human populations, is known to be mutagenic toward Salmonella tymphimurium strain TM677 when metabolically activated using a 9[...]texto impreso
DAVIS, REG, Autor ; FREARSON, MARTIN , Autor | Londres [REINO UNIDO] : David J. Mowthorpe | Analytical Chemistry by open learning | 1987texto impreso
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Whatever your ICP-MS experience, you probably know that there are many textbooks compiled and edited by academics that approach ICP-MS from a purely theoretical and fundamental perspective, but there aren’t any books that provide a practical per[...]texto impreso
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TRONG KHOA PHAM, Autor ; PHILLIP C WRIGHT, AutorNowadays, proteomics is recognized as one of the fastest growing tools in many areas of research. This is especially true for the study of Saccharomyces cerevisiae, as it is considered to be a model organism for eukaryotic cells. Proteomic analy[...]texto impreso
LONG ZHOU, Autor ; CHEN CHEN, Autor ; HOU XIANDENG, Autor ; ZHENG CHENGBIN, Autor | 2012As an extended discussion of Part I, this review provides a survey of the literature about the elemental and speciation analysis of hydride-forming and non-hydride-forming elements in real samples by using hydride generation–analytical atomic sp[...]texto impreso
LONG ZHOU, Autor ; LUO YAMIN, Autor ; ZHENG CHENGBIN, Autor ; DENG PENGCHI, Autor ; HOU XIANDENG, Autor | 2012Hydride generation is the most popular and widely used chemical vapor generation technique and is interesting to analytical chemists as an effective sample introduction method, especially for elemental determination and speciation analysis by an[...]documento electrónico
D.M. HOLSTEGE, Autor ; B. PUSCHNER, Autor ; G. WHITEHEAD, Autor ; F.D. GALEY, Autor | 2002Milk is typically screened for â-lactam antibiotics by nonspecific methods. Although these methods are rapid and sensitive, they are not quantitative and can yield false positive findings. A sensitive and specific method for the quantitation and[...]texto impreso
THOMAS PROHASKA, Editor científico ; JOHANNA IRRGEHER, Editor científico ; ANDREAS ZITEK, Editor científico ; NORBERT JAKUBOWSKI, Editor científico | Cambridge [REINO UNIDO] : Royal Society of Chemistry | News Developments in Mass Spectrometry | 2015This book was triggered by the success story of sector field mass spectrometry in elemental and isotopic analysis since the first presentation of the mass spectrum of Ne a hundred years ago. The outstanding and unique features of sector field ma[...]documento electrónico
Birgitte Kjær Sørensen, Autor ; Peter Højrup, Autor ; Erik Østergård, Autor ; Charlotte Sværke Jørgensen, Autor ; Jan Enghild, Autor ; Lisa Rebekka Ryder, Autor ; Gunnar Houen, Autor | 2002A fast and convenient method for silver staining of proteins on electroblotting membranes was developed based on Gallyas' histochemical intensifier and applied to human endothelial cell proteins separated by one- and two-dimensional electrophore[...]texto impreso
DESMARCHELIER AURÉLIEN, Autor ; GUILLAMON CUADRA MIRIAM, Autor ; THIERRY DELATOUR, Autor ; PASCAL MOTTIER, AutorAn isotope dilution liquid chromatography-electrospray ionization tandem mass spectrometry method for the simultaneous determination of melamine and cyanuric acid in cow’s milk(range of 0-0.3 mg/kg)and milk-based infant formulas(ranges of 0-0.[...]documento electrónico
SUN, JING, Autor ; YANG, Autor ; HSIAOWAN LEE, Autor ; LIN WANG, Autor | 2015The simultaneous separation and determination of As(III), As(V), monomethylarsenic acid (MMA), dimethylarsenic acid (DMA), Cr(III), Cr(VI) and Cd(II) in water samples have been carried out by anion exchange liquid chromatography with inductively[...]texto impreso
In this paper, spatial and temporal variations of three common microcystins (MC-RR, MC-YR, and MC-LR) in the hepatopancreas of a freshwater snail (Bellamya aeruginosa) were studied monthly in two bays of Lake Taihu. Microcystins (MCs) concentrat[...]Article : texto impreso
Fué desarrollado un método de laboratorio para la caracterización de las emisiones de compuestos volátiles orgánicos totales ( VOC), a partir del prensado de tableros de virutas orientadas ( OSB), basado en un sistema de membrana encerrada, e[...]texto impreso
The analysis of highly hydrophilic, ionic, and polar compounds has been performed by HILIC-ESI-MS for the last few years. The use of low aqueous/high polar organic solvent content in HILIC separation mobile phase is almost ideal for ESI-MS detec[...]texto impreso
Atomic spectroscopy and mass spectrometry are important tools for identifying and quantifying trace elements in food products-elements that may be potentially beneficial or potentially toxic. The Determination of Chemical Elements in Food: Appli[...]Article : texto impreso
Paneles contrachapados para la construcción fabricados en cinco pantas de contrachapados fueron analizados para detectar los compuestos fenólicos y el fenol libre. Pequeñas muestras de contrachapados fueron molidos a polvo detexto impreso
FRANK VANHAECKE, Autor ; LIEVE BALCAEN, Autor ; DMITRY MALINOVSKY, Autor | 2009This article is intended as a tutorial review on the use of single-collector and multi-collector ICPMS for isotope ratio determination. The monitoring and quantification of both induced and natural differences in the isotopic composition of targ[...]Article : texto impreso
XIE, CHANGSHI, Autor ; RUDDICK, JOHN N.R., Autor |El duramen del abeto Douglas a menudo se vuelve muy oscuro cuando es tratado con preservantes de cobre amoniacal. La causa de esta coloración negra es desconocida. El examen de los extractos solubles en acetona presentes en el duramen del abeto[...]