High-energy photons, electrons, and ions initiate ion–neutral chemistry in Titan’s upper atmosphere by ionizing the major neutral species (nitrogen and methane). The Ion and Neutral Mass Spectrometer (INMS) onboard the Cassini spacecraft performed the first composition measurements of Titan’s ionosphere. INMS revealed that Titan has the most compositionally complex ionosphere in the Solar Syste...

Groundwater is prime and major source of drinking water in our world. Jharkhand also used for drinking, domestic, irrigation, mining industrial etc. purposes. In some population are suffering from scarcity pure have partial facility with as groundwater many area contaminated fluoride, arsenic, heavy metals iron dangerous chemicals. This review paper focuses on current status contamination diffe...

Peptide sequence analysis using a combination of gas-phase ion/ion chemistry and tandem mass spectrometry (MS/MS) is demonstrated. Singly charged anthracene anions transfer an electron to multiply protonated peptides in a radio frequency quadrupole linear ion trap (QLT) and induce fragmentation of the peptide backbone along pathways that are analogous to those observed in electron capture disso...

the interaction between holo-transferin (htf) and colchicine (col) was investigated in the present of pb +2 ions under physiological conditions by using synchronous fluorescence spectra. the synchronous fluorescence spectra show a slight change of tryptophan residue micro-environment. synchronous fluorescence spectra show that the structure of the tyrosine residue environment was altered by int...

Gas-phase transformation of synthetic phosphatidylcholine (PC) monocations to structurally informative anions is demonstrated via ion/ion reactions with doubly deprotonated 1,4-phenylenedipropionic acid (PDPA). Two synthetic PC isomers, 1-palmitoyl-2-oleoyl-sn-glycero-3-phosphocholine (PC(16:0/18:1)) and 1-oleoyl-2-palmitoyl-sn-glycero-3-phosphocholine (PC(18:1/16:0)), were subjected to this io...

We have analyzed the isotopomer abundance ratios of an equimolar mixture of nine fatty acid methyl esters (decanoate, undecanoate, laurate, tridecanoate, myristate, pentadecanoate, palmitate, heptadecanoate, and stearate) by selected-ion monitoring gas chromatography/electron impact/mass spectrometry (GC/EI/MS). The abundance of the second lowest m/z isotopomer (IM1) increased disproportionatel...