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https://www.readbyqxmd.com/read/27911936/serum-calcium-magnesium-zinc-and-copper-levels-in-sudanese-women-with-preeclampsia
#1
Abdelmageed Elmugabil, Hamdan Z Hamdan, Anas E Elsheikh, Duria A Rayis, Ishag Adam, Gasim I Gasim
BACKGROUND: Although the exact pathophysiology of preeclampsia is not fully understood, several elemental micronutrient abnormalities have been suggested to play a contributory role in preeclampsia. AIMS: To investigate the levels of calcium, magnesium, zinc and copper in women with preeclampsia. SUBJECTS AND METHODS: A case-control study was conducted in Omdurman Maternity Hospital, Sudan, during the period of September through December 2014...
2016: PloS One
https://www.readbyqxmd.com/read/27910129/synthesis-of-c-14-radiolabeled-glucagon-receptor-antagonist-and-its-use-in-a-human-mass-balance-study
#2
Boris A Czeskis, Darlene K Satonin
The synthesis of the radiolabeled glucagon receptor antagonist 1-[(14) C] was accomplished based on decarboxylative iodination of acid 2 followed by "reattachment" of (14) C carboxylic function. The method allowed a significant reduction in the number of steps in preparation of the radiolabeled compound. Iodide 4, obtained by the halodecarboxylation, was converted to cyanide 5-[(14) C], which was hydrolyzed to provide the radiolabeled acid 2-[(14) C]. Coupling with β-alanine fragment and hydrolysis of ester 6-[(14) C] completed the synthesis of the target molecule 1-[(14) C]...
December 1, 2016: Journal of Labelled Compounds & Radiopharmaceuticals
https://www.readbyqxmd.com/read/27908430/evaluation-of-tissue-metal-and-trace-element-content-in-a-rat-model-of-non-alcoholic-fatty-liver-disease-using-icp-drc-ms
#3
Eugenia R Gatiatulina, Elizaveta V Popova, Valentina S Polyakova, Anastasia A Skalnaya, Eduard F Agletdinov, Alexandr A Nikonorov, Anatoly V Skalny, Alexey A Tinkov
The primary objective of the study was to assess the level of metals and trace elements in liver, serum, and hair of rats with diet-induced non-alcoholic fatty liver disease (NAFLD) using inductively coupled plasma dynamic reaction cell mass spectrometer (ICP-DRC-MS). 56 female 3-months-old Wistar rats divided into two equal groups were fed either standard (10% calories from fat) or high-fat high-carbohydrate diet (60% calories from fat in chow and 10% sucrose solution) for 6 weeks. Serum was examined for insulin resistance markers, lipid profile, and alanine aminotransferase (ALT) activity...
January 2017: Journal of Trace Elements in Medicine and Biology
https://www.readbyqxmd.com/read/27908426/environmental-exposures-of-trace-elements-assessed-using-keratinized-matrices-from-patients-with-chronic-kidney-diseases-of-uncertain-etiology-ckdu-in-sri-lanka
#4
Saranga Diyabalanage, Sanjeewani Fonseka, D M S N B Dasanayake, Rohana Chandrajith
An alarming increase in chronic kidney disease with unknown etiology (CKDu) has recently been reported in several provinces in Sri Lanka and chronic exposures to toxic trace elements were blamed for the etiology of this disease. Keratinized matrices such as hair and nails were investigated to determine the possible link between CKDu and toxic element exposures. Elements Li, B, Al, Cr, Mn, Fe, Co, Ni, Cu, Zn, As, Se, Sr, Mo, Cd, Ba, Hg and Pb of hair and nails of patients and age that matched healthy controls were determined with Inductively Coupled Plasma Mass Spectrometry (ICP-MS)...
January 2017: Journal of Trace Elements in Medicine and Biology
https://www.readbyqxmd.com/read/27908421/low-magnesium-diet-alters-distribution-of-macroelements-and-trace-elements-in-tissues-and-organs-of-female-rats
#5
Anastasia A Zheltova, Maria V Kharitonova, Igor N Iezhitsa, Eugeny P Serebryansky, Oleg Y Evsyukov, Alexander A Spasov, Anatoly V Skalny
The aim of the present study was to assess whether dietary magnesium deficiency can alter distribution of macroelements and trace elements in different organs and tissues. Experiments were carried out on 12 adult female Wistar rats, which were fed either a diet with low Mg content (≤20mgkg(-1) of diet) (LMgD) or a diet with daily recommended Mg content (≈500mgkg(-1)) as control group (CG) for 70 days. On the 70th day of the experiment heart, aorta, femoral skeletal muscle, forebrain, cerebellum, pituitary gland, thyroid gland, ovaries, uterus, liver, kidneys, and spleen were taken for analysis of mineral content...
January 2017: Journal of Trace Elements in Medicine and Biology
https://www.readbyqxmd.com/read/27908406/trace-element-biomonitoring-in-hair-of-school-children-from-a-polluted-area-by-sector-field-inductively-coupled-plasma-mass-spectrometry
#6
Evgenii J Drobyshev, Nikolay D Solovyev, Natalya B Ivanenko, Maria Yu Kombarova, Alexander A Ganeev
In the current study, a biomonitoring of 18 hair trace elements (Al, As, Cd, Co, Cr, Cu, Fe, Hg, Mg, Mn, Ni, Pb, Se, V, Zn, Ca, Na and P) in school children from Leningradskaya Oblast' is reported. A case group, residing in a proximity to the toxic waste disposal grounds (Krasniy Bor), has been assessed vs. controls from a non-urban settlement Seltso. In total, 166 hair samples were analysed using double focusing sector field inductively coupled plasma mass spectrometry after microwave-assisted sample digestion with nitric acid...
January 2017: Journal of Trace Elements in Medicine and Biology
https://www.readbyqxmd.com/read/27908403/trace-metal-concentrations-in-hair-and-nails-from-alzheimer-s-disease-patients-relations-with-clinical-severity
#7
Emel Koseoglu, Rahmi Koseoglu, Murat Kendirci, Recep Saraymen, Burak Saraymen
BACKGROUND AND OBJECTIVES: Metals, especially transition metals, seem to be important in the pathogenesis of Alzheimer disease. This study aims to determine the relationship of trace metal elements to the pathogenesis and/or course of Alzheimer Disease in terms of clinical severity. METHODS: The hair and nail trace metal levels of 62 Alzheimer Disease patients at different clinical stages (21 mild, 20 moderate, 21 severe) and 60 healthy control subjects were measured by using inductively coupled plasma-mass spectrometry...
January 2017: Journal of Trace Elements in Medicine and Biology
https://www.readbyqxmd.com/read/27900624/the-sources-of-trace-element-pollution-of-dry-depositions-nearby-a-drinking-water-source
#8
Xinyue Guo, Hongbing Ji, Cai Li, Yang Gao, Huaijian Ding, Lei Tang, Jinguo Feng
Miyun Reservoir is one of the most important drinking water sources for Beijing. Thirteen atmospheric PM sampling sites were established around this reservoir to analyze the mineral composition, morphological characteristics, element concentration, and sources of atmospheric PM pollution, using transmission electron microscope, X-ray diffraction, and inductively coupled plasma mass spectrometry analyses. The average monthly dry deposition flux of aerosols was 15.18 g/m(2), with a range of 5.78-47.56 g/m(2)...
November 29, 2016: Environmental Science and Pollution Research International
https://www.readbyqxmd.com/read/27900424/long-term-geochemical-evolution-of-lithogenic-versus-anthropogenic-distribution-of-macro-and-trace-elements-in-household-attic-dust
#9
Biljana Balabanova, Trajče Stafilov, Robert Šajn, Claudiu Tănăselia
Attic dusts were examined as historical archives of anthropogenic emissions, with the goal of elucidating the enrichment pathways associated with hydrothermal exploitation of Cu, Pb, and Zn minerals in the Bregalnica River basin in the eastern part of the Republic of Macedonia. Dust samples were collected from 84 settlements. Atomic emission spectrometry and mass spectrometry with inductively coupled plasma were applied as analytical techniques for the determination of 69 element contents. Multivariate analysis was applied for the extraction of dominant geochemical markers...
November 29, 2016: Archives of Environmental Contamination and Toxicology
https://www.readbyqxmd.com/read/27895622/serum-zn-cu-ratio-is-associated-with-renal-function-glycemic-control-and-metabolic-parameters-in-japanese-patients-with-and-without-type-2-diabetes-a-cross-sectional-study
#10
Hidetaka Hamasaki, Yu Kawashima, Hidekatsu Yanai
BACKGROUND: Zinc (Zn) and copper (Cu) may play a pivotal role in the pathogenesis of diabetes and diabetic complications by mediating oxidative stress. Both Zn deficiency and excess of Cu are associated with an increased risk of type 2 diabetes and cardiovascular disease. We aimed to investigate the relationships between serum Zn/Cu ratio and glycemic status, renal function, and metabolic parameters in patients with and without type 2 diabetes. METHODS: We conducted a cross-sectional study on 355 subjects (149 type 2 diabetic and 206 non-diabetic) in whom serum Zn and Cu levels were measured at the same time...
2016: Frontiers in Endocrinology
https://www.readbyqxmd.com/read/27894965/an-application-of-mass-spectrometry-for-quality-control-of-biologicals-highly-sensitive-profiling-of-plasma-residuals-in-human-plasma-derived-immunoglobulin
#11
Franck Limonier, Katleen Van Steendam, Geneviève Waeterloos, Koen Brusselmans, Myriam Sneyers, Dieter Deforce
: Thromboembolic events (TEE) associated to trace amounts of plasmatic activated coagulation factor XI (FXIa) in administrated immunoglobulin (Ig) have recently raised concerns and hence there is a need for highly sensitive profiling of residual plasma source proteins. This study aims to consider LC-ESI-QTOF data-dependent acquisition in combination with sample fractionation for this purpose. Sample fractionation proved mandatory to enable identification of plasma residuals. Two approaches were compared: Ig depletion with protein G - protein A affinity chromatography and low-abundant protein enrichment with a combinatorial peptide ligand library (ProteoMiner(TM), Bio-Rad)...
November 25, 2016: Journal of Proteomics
https://www.readbyqxmd.com/read/27894697/an-innovative-ultrasound-assisted-extraction-micro-scale-cell-combined-with-gas-chromatography-mass-spectrometry-in-negative-chemical-ionization-to-determine-persistent-organic-pollutants-in-air-particulate-matter
#12
E Beristain-Montiel, R Villalobos-Pietrini, G E Arias-Loaiza, S L Gómez-Arroyo, O Amador-Muñoz
New clean technologies are needed to determine concentration of organic pollutants without generating more pollution. A method to extract Persistent Organic Pollutants (POPs) from airborne particulate matter was developed using a novel technology recently patented called ultrasound assisted extraction micro-scale cell (UAE-MSC). This technology extracts, filters, collects the sample, and evaporates the solvent, on-line. No sample transfer is needed. The cell minimizes sample manipulation, solvent consumption, waste generation, time, and energy; fulfilling most of the analytical green chemistry protocol...
November 23, 2016: Journal of Chromatography. A
https://www.readbyqxmd.com/read/27892962/peptides-labeled-with-pyridinium-salts-for-sensitive-detection-and-sequencing-by-electrospray-tandem-mass-spectrometry
#13
Mateusz Waliczek, Monika Kijewska, Magdalena Rudowska, Bartosz Setner, Piotr Stefanowicz, Zbigniew Szewczuk
Mass spectrometric analysis of trace amounts of peptides may be problematic due to the insufficient ionization efficiency resulting in limited sensitivity. One of the possible ways to overcome this problem is the application of ionization enhancers. Herein we developed new ionization markers based on 2,4,6-triphenylpyridinium and 2,4,6-trimethylpyridinium salts. Using of inexpensive and commercially available pyrylium salt allows selective derivatization of primary amino groups, especially those sterically unhindered, such as ε-amino group of lysine...
November 28, 2016: Scientific Reports
https://www.readbyqxmd.com/read/27892593/dual-mode-refractive-index-and-charge-sensing-to-investigate-complex-surface-chemistry-on-nanostructures
#14
Nikhil Bhalla, Doojin Lee, Shivani Sathish, Amy Q Shen
This work presents a novel dual-mode charge and refractive index sensitive device integrated with nanoplasmonic islands, for the first time, on insulator-semiconductor junctions. The developed nano-metal-insulator semiconductor (nMIS) sensor facilitates simultaneous detection of charge and mass changes on the nanoislands due to the binding of biomolecules. The charging of the nanoislands is traced by using the capacitive field-effect electrolyte-metal-insulator-semiconductor structure and the refractive index changes are quantified by measuring the change in the localized surface plasmon resonances of the nanoislands...
November 28, 2016: Nanoscale
https://www.readbyqxmd.com/read/27891832/cortisol-in-human-milk-predicts-child-bmi
#15
Jennifer Hahn-Holbrook, Tran Bao Le, Anna Chung, Elysia Poggi Davis, Laura M Glynn
OBJECTIVE: Breastfeeding has been linked to lower rates of childhood obesity. Human milk contains cortisol, known to regulate glucose storage and metabolism. The aim of this study was to to test the hypothesis that early exposure to cortisol in human breast milk helps to modulate infant body mass index (BMI) trajectories over the first 2 years of life. METHODS: Growth curve modeling was used to examine whether infant exposure to cortisol in human milk at 3 months predicted changes in child body mass index percentile (BMIP) at 6, 12, and 24 months of age in 51 breastfeeding mother-child pairs...
December 2016: Obesity
https://www.readbyqxmd.com/read/27889850/chemical-fractionation-and-health-risk-assessment-of-particulate-matter-bound-metals-in-pune-india
#16
Rohi Jan, Ritwika Roy, Suman Yadav, P Gursumeeran Satsangi
The present study deals with the assessment of sequential extraction of particulate matter (PM)-bound metals and the potential health risks associated with them in a growing metropolitan city (Pune) of India. The average mass concentration of both PM2.5-10 and PM2.5 exceeded the National Ambient Air Quality Standards. Significant seasonal variation in mass concentration was found for both size fractions of PM with higher values in winter season and lower in monsoon. Chemical species of the studied trace metals in PM exhibited significant differences, due to difference in sources of pollution...
November 26, 2016: Environmental Geochemistry and Health
https://www.readbyqxmd.com/read/27887574/fluxfix-automatic-isotopologue-normalization-for-metabolic-tracer-analysis
#17
Sophie Trefely, Peter Ashwell, Nathaniel W Snyder
BACKGROUND: Isotopic tracer analysis by mass spectrometry is a core technique for the study of metabolism. Isotopically labeled atoms from substrates, such as [(13)C]-labeled glucose, can be traced by their incorporation over time into specific metabolic products. Mass spectrometry is often used for the detection and differentiation of the isotopologues of each metabolite of interest. For meaningful interpretation, mass spectrometry data from metabolic tracer experiments must be corrected to account for the naturally occurring isotopologue distribution...
November 25, 2016: BMC Bioinformatics
https://www.readbyqxmd.com/read/27886770/multiresidue-method-for-trace-pesticide-analysis-in-honeybee-wax-comb-by-gc-qqq-ms
#18
M D Gil García, S Uclés Duque, A B Lozano Fernández, A Sosa, A R Fernández-Alba
The aim of this analytical study is to develop an improved multi-residue methodology of high sensitivity and expanded scope for pesticide residue analysis in honeybee wax combs. The method was validated for 160 pesticide residues (including acaricides, insecticides, fungicides and herbicides) gas chromatography amenable and covering a wide variety of polarity and chemical structure. This method of analysis applied gas chromatography coupled to a triple quadrupole mass spectrometer for the quantitative analysis of pesticide residues...
January 15, 2017: Talanta
https://www.readbyqxmd.com/read/27886485/radial-acceleration-relation-in-rotationally-supported-galaxies
#19
Stacy S McGaugh, Federico Lelli, James M Schombert
We report a correlation between the radial acceleration traced by rotation curves and that predicted by the observed distribution of baryons. The same relation is followed by 2693 points in 153 galaxies with very different morphologies, masses, sizes, and gas fractions. The correlation persists even when dark matter dominates. Consequently, the dark matter contribution is fully specified by that of the baryons. The observed scatter is small and largely dominated by observational uncertainties. This radial acceleration relation is tantamount to a natural law for rotating galaxies...
November 11, 2016: Physical Review Letters
https://www.readbyqxmd.com/read/27882880/quantification-of-methanol-in-the-presence-of-ethanol-by-selected-ion-flow-tube-mass-spectrometry
#20
Catherine Chambers-Bédard, Brian M Ross
The quantification of trace compounds in alcoholic beverages is a useful means to both investigate the chemical basis of beverage flavor and to facilitate quality control during the production process. One compound of interest is methanol which, due to it being toxic, must not exceed regulatory limits. The analysis of headspace gases is a desirable means to do this since it does not require direct sampling of the liquid material. One established means to conduct headspace analysis is selected ion flow tube mass spectrometry (SIFT-MS)...
2016: European Journal of Mass Spectrometry
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