Basic mass spectrometry pot

... pusher Resolution example Mass range Mass Range is usually defined by the lower and upper m/z value observable by a mass analyzer. If your compound mass does not fall in the mass range of the mass analyzer, ... 249.1479 The fundamentals of accurate mass  carbon has a mass of 12.0000  hydrogen has a mass of 1.0078  oxygen has a mass of 15.9949  nitrogen has a mass o...

Ngày tải lên: 29/03/2014, 04:20

... minute Benefits . good for charged, polar or basic compounds . permits the detection of high -mass compounds at mass- to-charge ratios that are easily determined by most mass spectrometers (m/z typically ... the right conditions. For such compounds, negative ion mass spectrometryis more efficient, sensitive and selective than positive-ion mass spectrometry. Negative ions can be p...

Ngày tải lên: 22/03/2014, 14:20

... Discovery Using Mass Spectrometry Birendra Pramanik, Mike S. Lee, and Guodong Chen ț Characterization of Impurities and Degradants Using Mass Spectrometry Mike S. Lee and Mingshe Zhu ț Mass Spectrometry ... HISTORY Although mass spectrometry (MS) has aged by about one century, it has never ceased to evolve into an increasingly powerful and important technique for chemical an...

Ngày tải lên: 28/03/2014, 10:20

... soft ionization mass spectrometry. Int J Mass Spectrom 216, 1–27. 54 Heck AJR & van den Heuvel RHH (2004) Investigation of intact protein complexes by mass spectrometry. Mass Spectrom Rev 23, ... (1998) Fourier transform ion cyclotron resonance mass spec- trometry: a primer. Mass Spectrom Rev 17, 1–35. 56 Smith RD (2000) Evolution of ESI -mass spectrometry and Fourier tra...

Ngày tải lên: 07/03/2014, 17:20

... Natural-abundance isotope ratio mass spectrometry as a means of evaluating carbon redistribution during glucose–citrate cofermentation ... the redox status of the cells as a re gulatory factor. Keywords: carbon balance; isotope ratio mass spectrometry; lactic acid bacteria; m etabolic regulation; pyruvate. A r ange of simple sug ars ... 51 12 57 01, E-mail: richard.robins@chimbio.univ...

Ngày tải lên: 30/03/2014, 15:20

... et al., 1996; Kemmei et al., 2009), ion chromatography /mass spectrometry (Bauer et al., 1999; Knepper et al., 2005), gas chromatography /mass spetrometry (Nishikawa and Okumura, 1995), and liquid ... for 3 min. The carrier gas (helium) flow rate was set at 1.2 mL/min. Mass spectrometry was carried out using a 5973 Mass Selective Detector (Hewlett Packard, Wilmington, DE, USA)...

Ngày tải lên: 05/09/2013, 10:15

... fast response. Mass spec- trometry-based methods are of particular interest for the on- line analysis of reactions, 1 due to their high sensitivity and high specificity. Tandem mass spectrometry ... organic chemistry. 2,3 Although direct infusion electrospray ioniz- ation spectrometry (ESI-MS) 4–9 and membrane introduction mass spectrometry (MIMS) 10–12 are gaining popularity in th...

Ngày tải lên: 14/02/2014, 08:20

... Proteome analysis of human colon cancer by two-dimensional difference gel electrophoresis and mass spectrometry. Proteomics 4, 793–811. 5 Roblick UJ, Hirschberg D, Habermann JK, Palmberg C, Becker ... colorectal cancer by com- bining two-dimensional polyacrylamide gel electrophore- sis with a strictly mass spectrometry- based approach for data analysis. Mol Cell Proteomics 5, 2092–2101....

Ngày tải lên: 16/02/2014, 15:20

... A functional polymorphism of apolipoprotein C1 detected by mass spectrometry Matthew S. Wroblewski 1 , Joshua T. Wilson-Grady 1 , Michael B. Martinez 1 , Raj ... that suggest the functional significance of this residue change. They Keywords apolipoprotein C1; mass spectrometry; polymorphism; protein–lipid contact surface Correspondence G. L. Nelsestuen, 6–155 ... with observed removal...

Ngày tải lên: 19/02/2014, 05:20

... experiments. For each experiment, mass spectra were acquired from duplicates. The accuracy in mass determination obtained for the different species was ± 2 U. Mass values given through- out the ... time and placed on a probe spot. As soon as the samples were dry, the probe was transferred into the mass spectrometer so that spectra could be acquired immediately. The mass spectra for...

Ngày tải lên: 19/02/2014, 12:20