Results 11 to 20 of about 15,501 (138)
Stable Nitrogen Isotope Analysis of Amino Acids by Orbitrap Mass Spectrometry: Application for Extraterrestrial Samples. [PDF]
Rapid Commun Mass SpectromABSTRACT Background Obtaining isotopic data on soluble organic compounds, such as amino acids, in extraterrestrial samples is crucial for understanding their origins, prebiotic chemistry, and potential contamination. Conventional GC‐IRMS requires grams of material to measure isotopic compositions, limiting the analysis of low‐concentration organics in ...
McIntosh OM +9 more
europepmc +2 more sources
Scientific Reports, 2022 Porous silica particles were prepared by sol–gel method with some modification to get wide-pore particles. These particles were derivatized with N-phenylmaleimide-methylvinylisocyanate (PMI) and styrene by reversible addition fragmentation chain transfer
Sarah Alharthi +6 more
doaj +1 more source
MALDI-induced fragmentation of leucine enkephalin, nitro-Tyr-leucine enkaphalin, and d5-Phe-nitro-Tyr-leucine enkephalin [PDF]
International Journal of Mass Spectrometry, 2009 The long-term objective of this study is to use MALDI MS and MS/MS to study the fragmentation pattern of in vitro nitrotyrosine-containing peptides in order to assist the interpretation of MS-identification of endogenous nitroproteins in human tissues and fluids.
Xianquan Zhan, Dominic M. Desiderio
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International Journal of Aquatic Biology, 2019 The current study focused on the effect of administration of the neurotransmitter leucine enkephalin on ovarian maturation in the freshwater crab Travancoriana schirnerae.
Navya Gopal, Arath Raghavan Sudha Devi
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Degradation of Multiple Peptides by Microcystin-Degrader Paucibacter toxinivorans (2C20)
Toxins, 2021 Since conventional drinking water treatments applied in different countries are inefficient at eliminating potentially toxic cyanobacterial peptides, a number of bacteria have been studied as an alternative to biological filters for the removal of ...
Allan A. Santos +6 more
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Biological Procedures Online, 1998 The intestinal absorption of analgesic peptides (leucine enkephalin and kyotorphin) and modified peptides in rat were studied. Although these peptides were not absorbed, the absorbability (absorption clearance) of these peptides were increased in the ...
Mizuma Takashi, Awazu Shoji
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Photodissociation spectroscopy of protonated leucine enkephalin
Physical Chemistry Chemical Physics, 2017 The protonated pentapeptide leucine enkephaline (YGGFL) fragments upon absorption of multiple UV photons by the tyrosine chromophore, providing complete sequence coverage.
Andreas Herburger +2 more
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A trigeminoreticular pathway: implications in pain. [PDF]
PLoS ONE, 2011 Neurons in the caudalmost ventrolateral medulla (cmVLM) respond to noxious stimulation. We previously have shown most efferent projections from this locus project to areas implicated either in the processing or modulation of pain.
W Michael Panneton +2 more
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Comparative Analysis of Dalargin Pharmaceutical Substance Identification Methods
Разработка и регистрация лекарственных средств, 2020 Introduction. The quality control of a medicinal product needs to be systematically improved in connection with a continuous increase in the requirements for the quality of medicines. When assessing the quality of substances and drugs, the most important
M. G. Shulzhenko +5 more
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Molecules, 2008 The nervous and immune systems of invertebrates can exchange informationthrough neuropeptides. Furthermore, some opioid peptides can function as endogenousimmune system messengers and participate in the regulation of the immune responses.
Hong-zhi Xu, Zhi-wei Chen, Dong-wu Liu
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