نتایج جستجو برای: alpha spectrometry

تعداد نتایج: 296808  

Journal: :Journal of Agricultural Sciences 2021

Purpose: Coconut testa is a byproduct of coconut industry and currently used for oil extraction. The partially defatted residue underutilized despite being able to convert into flour (CTF). objective the present study was compare bioactivity different solvent extracts CTF obtained from selected Sri Lankan cultivars namely, Gon Thambili (GT), Ran (RT), San Raman (SR), Tall×Tall (TT) commercial h...

Journal: :Analytical chemistry 2004
Cheng-Tai Chen Yu-Chie Chen

This study describes a new means to conduct molecular recognition-based analysis using mass spectrometry. Taking advantage of the unique characteristic of the absorption capacity of the TiO(2) sol-gel material in the UV region, a TiO(2) sol-gel-deposited thin film was employed as the sample substrate to assist in UV laser desorption/ionization of analytes. Sol-gels are polymeric materials that ...

Journal: :Diabetes 2009
Jacob M. Haus Sangeeta R. Kashyap Takhar Kasumov Renliang Zhang Karen R. Kelly Ralph A. DeFronzo John P. Kirwan

OBJECTIVE To quantitate plasma ceramide subspecies concentrations in obese subjects with type 2 diabetes and relate these plasma levels to the severity of insulin resistance. Ceramides are a putative mediator of insulin resistance and lipotoxicity, and accumulation of ceramides within tissues in obese and diabetic subjects has been well described. RESEARCH DESIGN AND METHODS We analyzed fasti...

2016
Shih-Yi Lin Chao-Hsiang Chang His-Chin Wu Ching-Chan Lin Kai-Po Chang Chi-Rei Yang Chi-Ping Huang Wu-Huei Hsu Chiz-Tzung Chang Chao-Jung Chen

MALDI-TOF spectrometry has not been used for urinary exosome analysis. We used it for determining UC biomarkers. From 2012 to 2015, we enrolled 129 consecutive patients with UC and 62 participants without UC. Exosomes from their urine were isolated, and analyzed through MALDI-TOF spectrometry. Immunohistochemical (IHC) analysis of another 122 UC and 26 non-UC tissues was conducted to verify the...

Journal: :European journal of mass spectrometry 2003
Eduardo C Meurer Fabio C Gozzo R Augusti Marcos N Eberlin

The kinetic method is used to corroborate the description of ground state ionized alpha-diketones as loosely electron-bonded acylium ion dimers: R(1)-C=O(+)---e(-)---(+)O=C-R(2). The abundance ratio of both the acylium ion fragments R(1)CO(+) and R(2)CO(+) (summed to those of their respective secondary fragments) formed upon low energy (5 eV) collision-induced dissociation of several ionized al...

Journal: :Journal of environmental radioactivity 2013
J Fons D Zapata-García J Tent M Llauradó

The determination of gross alpha, gross beta and (226)Ra activity in natural waters is useful in a wide range of environmental studies. Furthermore, gross alpha and gross beta parameters are included in international legislation on the quality of drinking water [Council Directive 98/83/EC]. In this work, a low-background liquid scintillation counter (Wallac, Quantulus 1220) was used to simultan...

Journal: :Trends in Sciences 2021

In the present study, a set of different benzoxazole derivatives has been synthesized from ethyl acetoacetate, ethoxymethylene malononitrile, NaNO2, and organic acids. Analytical instruments like proton NMR (1H), carbon (13C), infrared spectroscopy (IR), LC-MS mass spectrometry were used for structural characterization. Synthesized molecules evaluated In-vitro antioxidant property (DPPH assay, ...

Journal: :Journal of Chemistry 2023

Bay laurel leaves, also known as bay are an important herb in many cuisines around the world. In addition to their use cooking, leaves have been used for medicinal properties and thought anti-inflammatory antimicrobial effects. Gas chromatography/mass spectrometry (GC-MS) device was determine secondary metabolites essential oil of samples kept at different temperatures (−22, −20, −18, 2, 4, 6, ...

Journal: :Glycobiology 1997
J O Previato C Jones R Wait F Routier E Saraiva L Mendonça-Previato

Glycoinositolphospholipids (GIPLs) were isolated from promastigotes of the lizard parasites Leishmania adleri by phenol/water extraction. Phosphoinositol oligosaccharides were liberated by mild alkaline hydrolysis, purified by gel filtration and high pH anion exchange chromatography, and characterized by methylation analysis, fast atom bombardment mass spectrometry, and nuclear magnetic resonan...

Introduction: The aim of the present study was to determine the levels of alpha particles and heavy metals contamination in the meat products consumed in Najaf, Iraq. Moreover, this study was also targeted toward comparing the results with those in the literature and making appropriate conclusion and recommendations. Material and Methods: This study determined the track of alpha particles and ...

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