نتایج جستجو برای: irms

تعداد نتایج: 366  

2007
K. M. EEK

One of the outstanding current problems in both geobiology and environmental microbiology is the quantitative analysis of in situ microbial metabolic activities. Techniques capable of such analysis would have wide application, from quantifying natural rates of biogeochemical cycling to identifying the metabolic activity of uncultured organisms. We describe here a method that represents one step...

Journal: :Science & justice : journal of the Forensic Science Society 2009
Nicola Farmer James Curran David Lucy Niamh Nic Daeid Wolfram Meier-Augenstein

Arson is a significant problem around the world, and is a crime which results in a low number of convictions. The scene of an arson can be varied, commercial, residential or national park, and recently cases have been identified which were initiated by a lit match. Matches can be recovered from a scene, usually in a burnt condition. The benefit of analysing unburnt matches has been researched p...

Journal: :European journal of mass spectrometry 2006
John M Halket Vladimir G Zaikin

The review describes on-line derivatization/degradation methods employed in mass spectrometry to solve some structural and analytical problems. Advantages and applications of various positions of reaction systems connected mainly to a mass spectrometer or a gas chromatograph/mass spectrometer are considered. Among these are reaction systems connected directly to the mass spectrometer (reaction ...

Journal: :Journal of microbiological methods 2001
M F DeFlaun M E Fuller P Zhang W P Johnson B J Mailloux W E Holben W P Kovacik D L Balkwill T C Onstott

The purpose of this study was to compare in a laboratory experiment, a suite of methods developed to track viable bacteria during field transport experiments. The criteria for development and selection of these methods included: (1) the ability to track bacteria within the environment from which they were isolated; (2) the lack of any effect upon the viability or the transport characteristics o...

Journal: :Journal of oleo science 2013
Nina Naquiah Ahmad Nizar Jalaldeen Mohamed Nazrim Marikkar Dzulkifly Mat Hashim

A study was conducted to differentiate lard, chicken fat, beef fat and mutton fat using Gas Chromatography Mass Spectrometry (GC-MS) and Elemental Analyzer-Isotope Ratio Mass Spectrometry (EA-IRMS). The comparison of overall fatty acid data showed that lard and chicken fat share common characteristics by having palmitic, oleic and linoleic acid as major fatty acids while beef and mutton fats sh...

2015
Isabel Gonçalves Elisavet Andersson Georgiadou Sören Mattsson Göran Skog Luís Pedro José Fernandes e Fernandes Nuno Dias Gunnar Engström Jan Nilsson Kristina Stenström

Mediterranean diet has been suggested to explain why coronary heart disease mortality is lower in southern than northern Europe. Dietary habits can be revealed by isotope ratio mass spectrometry (IRMS) measurement of carbon (δ(13)C) and nitrogen (δ(15)N) in biological tissues. To study if diet is associated with human plaque stability, atherosclerotic plaques from carotid endarterectomy on 56 p...

2015
Yacine Nia Sandrine Millour Laurent Noël Petra Krystek Wim de Jong Thierry Guérin

The accurate determination of nanoparticles (NPs) content in biological samples is of great interest for studying its potential impacts on health. This paper describes a method validation process for Ti determination from TiO2 NPs in biological matrixes using a closed-vessel microwave digestion with a mixture of 3 mL of HNO3 and 0.4 mL of HF and a detection by quadrupole inductively coupled pla...

2005
Elin Norlin

Norlin, E., 2005. Nitrogen Isotope Analysis of Ammonium and Glycine. Method Development for Aqueous Solutions and Soil Extracts. Doctor ́s dissertation. ISSN 1652-6880, ISBN 91-576-6983-X Stable isotope techniques can be used as a tool in nitrogen cycling studies of different ecosystems. The studies are based on measurement of the heavy (N)tolight (N) isotopic ratios of nitrogen in different bio...

Journal: :Scientific Journal of Polonia University 2022

The article considers the development of musical and cultural life in largest centres Southern Ukraine late 19th – early 20th century: Kherson, Nikolaev Odessa. author pays special attention to specific features region determined by its geographical location multi-ethnic population. In many provincial district Ukraine, developed due no small way involvement musically gifted foreigners: Czech Ge...

نمودار تعداد نتایج جستجو در هر سال

با کلیک روی نمودار نتایج را به سال انتشار فیلتر کنید