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GC MS analysis

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https://www.readbyqxmd.com/read/29350879/genetic-and-chemical-diversity-in-perovskia-abrotanoides-karel-lamiaceae-populations-based-on-issrs-markers-and-essential-oils-profile
#1
Seyyed Hossein Pourhosseini, Javad Hadian, Ali Sonboli, Samad Nejad Ebrahimi, Mohammad Hossein Mirjalili
Genetic and the essential oil composition variability among twelve Perovskia abrotanoides populations (PAbPs) growing wild in Iran were assessed by ISSR markers, GC-FID and GC-MS, respectively. Nine selected ISSR primers produced 119 discernible bands, of them 96 (80.7%) being polymorphic. Genetic similarity values among populations ranged between 0.07 and 0.79 which indicated a high level of genetic variation. Polymorphic information content, resolving power and marker index generated by ISSR primers were, 0...
January 19, 2018: Chemistry & Biodiversity
https://www.readbyqxmd.com/read/29348723/metabolite-profiling-of-fermented-ginseng-extracts-by-gas-chromatography-mass-spectrometry
#2
Seong-Eun Park, Seung-Ho Seo, Kyoung In Lee, Chang-Su Na, Hong-Seok Son
Background: Ginseng contains many small metabolites such as amino acids, fatty acids, carbohydrates, and ginsenosides. However, little is known about the relationships between microorganisms and metabolites during the entire ginseng fermentation process. We investigated metabolic changes during ginseng fermentation according to the inoculation of food-compatible microorganisms. Methods: Gas chromatography mass spectrometry (GC-MS) datasets coupled with the multivariate statistical method for the purpose of latent-information extraction and sample classification were used for the evaluation of ginseng fermentation...
January 2018: Journal of Ginseng Research
https://www.readbyqxmd.com/read/29348083/gc-ms-and-hplc-profiles-of-phenolic-fractions-of-the-leaf-of-telfairia-occidentalis
#3
Olorunfemi A Eseyin, Munavvar A Sattar, Hassaan A Rathore, Flora Aigbe, Sheryar Afzal, Ashfaq Ahmad, Mohammed Lazhari, Safia Akthar
Telfairia occidentalis possesses high antioxidant activity. However, the antioxidant components of the plant have not yet been identified. This study was undertaken to identify the phenolics in the leaf of the plant. Extract and fractions of the leaf of the plant were analysed using the HPLC and GCMS. HPLC analysis revealed the presence of gallic acid (22.19μg/mg), catechin (29.17μg/mg), caffeic acid (9.17μg/mg), ferulic acid (0.94μg/mg), sinapic acid (1.91 μg/mg) and 4-hydroxy benzoic acid (43.86 μg/mg) in the aqueous extract...
January 2018: Pakistan Journal of Pharmaceutical Sciences
https://www.readbyqxmd.com/read/29346327/enhanced-isotopic-ratio-outlier-analysis-iroa-peak-detection-and-identification-with-ultra-high-resolution-gc-orbitrap-ms-potential-application-for-investigation-of-model-organism-metabolomes
#4
Yunping Qiu, Robyn D Moir, Ian M Willis, Suresh Seethapathy, Robert C Biniakewitz, Irwin J Kurland
Identifying non-annotated peaks may have a significant impact on the understanding of biological systems. In silico methodologies have focused on ESI LC/MS/MS for identifying non-annotated MS peaks. In this study, we employed in silico methodology to develop an Isotopic Ratio Outlier Analysis (IROA) workflow using enhanced mass spectrometric data acquired with the ultra-high resolution GC-Orbitrap/MS to determine the identity of non-annotated metabolites. The higher resolution of the GC-Orbitrap/MS, together with its wide dynamic range, resulted in more IROA peak pairs detected, and increased reliability of chemical formulae generation (CFG)...
January 18, 2018: Metabolites
https://www.readbyqxmd.com/read/29346294/gc-ms-analysis-of-the-volatile-constituents-in-the-leaves-of-14-compositae-plants
#5
Yiguang Wang, Xiran Li, Qinjie Jiang, Hainan Sun, Jiafu Jiang, Sumei Chen, Zhiyong Guan, Weimin Fang, Fadi Chen
The green organs, especially the leaves, of many Compositae plants possess characteristic aromas. To exploit the utility value of these germplasm resources, the constituents, mainly volatile compounds, in the leaves of 14 scented plant materials were qualitatively and quantitatively compared via gas chromatography-mass spectrometry (GC-MS). A total of 213 constituents were detected and tentatively identified in the leaf extracts, and terpenoids (especially monoterpene and sesquiterpene derivatives), accounting for 40...
January 18, 2018: Molecules: a Journal of Synthetic Chemistry and Natural Product Chemistry
https://www.readbyqxmd.com/read/29346037/development-of-an-ultrasensitive-pcr-assay-for-polycyclic-musk-determination-in-fish
#6
Xiaohan Zhang, Huisheng Zhuang
Polycyclic musks (PCMs) in the aquatic environment and organisms have become an emerging environmental issue because of their potential risk. The most used method for polycyclic musk determination is gas chromatography-mass spectrometry (GC-MS) with different sample extractions, which are somewhat expensive to operate, complex and laborious. In this study, a novel and ultrasensitive real-time polymerase chain reaction (PCR) assay with multiple signal amplification of carboxylic-DNA by gold nanoparticle-polyamidoamine conjugation (Au-PAMAM) was developed for determining polycyclic musks in fish...
January 18, 2018: Food Additives & Contaminants. Part A, Chemistry, Analysis, Control, Exposure & Risk Assessment
https://www.readbyqxmd.com/read/29345465/microplastic-abundance-and-composition-in-western-lake-superior-as-determined-via-microscopy-pyr-gc-ms-and-ftir
#7
Erik Hendrickson, Elizabeth C Minor, Kathryn Schreiner
While plastic pollution in marine and freshwater systems is an active area of research, there is not yet an in-depth understanding of the distributions, chemical compositions, and fates of plastics in aquatic environments. In this study, the magnitude, distribution, and common polymers of microplastic pollution in surface waters in western Lake Superior are determined. Analytical methodology, including estimates of ambient contamination during sample collection and processing, are described and employed. Microscopy, Pyrolysis-Gas Chromatography/Mass spectrometry (Pyr-GC/MS), and Fourier Transform Infrared spectroscopy (FTIR) were used to quantify and identify microplastic particles...
January 18, 2018: Environmental Science & Technology
https://www.readbyqxmd.com/read/29344957/rapid-differentiation-of-chinese-hops-varieties-humulus-lupulus-using-volatile-fingerprinting-by-hs-spme-gc-ms-combined-with-multivariate-statistical-analysis
#8
Zechang Liu, Liping Wang, Yumei Liu
BACKGROUND: Hops imparts flavor to beer, and its volatile components characterize the various hops varieties and qualities. The volatile components of hops are used for distinguishing between its various varieties and qualities. Fingerprinting, especially flavor fingerprinting, is often used to identify "flavor products", since inconsistencies in the description of flavor may lead to incorrect definition of beer quality. Compared to flavor fingerprinting, volatile fingerprinting is simpler and easier...
January 18, 2018: Journal of the Science of Food and Agriculture
https://www.readbyqxmd.com/read/29339338/the-phytotoxicities-of-decabromodiphenyl-ether-bde-209-to-different-rice-cultivars-oryza-sativa-l
#9
Kelun Li, Jie Chen, Lizhong Zhu
Decabromodiphenyl ether (BDE-209), as a major component of brominated flame retardants, has been detected in the agricultural soil in considerable amount. Given that BDE-209 is toxic, ubiquitous and persistent, BDE-209 might induce toxic effects on rice cultivars planted in contaminated soil. A comparative study was conducted on phytotoxicities and GC-MS based antioxidant-related metabolite levels to investigate the differences of phytotoxicities of BDE-209 to rice cultivars in Yangtze River Delta of China...
January 12, 2018: Environmental Pollution
https://www.readbyqxmd.com/read/29338666/boosted-tca-cycle-enhances-survival-of-zebrafish-to-vibrio-alginolyticus-infection
#10
Man-Jun Yang, Zhi-Xue Cheng, Ming Jiang, Zao-Hai Zeng, Bo Peng, Xuan-Xian Peng, Hui Li
Vibrio alginolyticus is a waterborne pathogen that infects a wide variety of hosts including fish and human, and the outbreak of this pathogen can cause a huge economic loss in aquaculture. Thus, enhancing host's capability to survive from V. alginolyticus infection is key to fighting infection and this remains still unexplored. In the present study, we established a V. alginolyticus-zebrafish interaction model by which we explored how zebrafish survived from V. alginolyticus infection. We used GC-MS based metabolomic approaches to characterize differential metabolomes between survival and dying zebrafish upon infection...
January 17, 2018: Virulence
https://www.readbyqxmd.com/read/29337687/comparison-of-the-solid-phase-and-liquid-liquid-extraction-methods-for-methadone-determination-in-human-serum-and-whole-blood-samples-using-gas-chromatography-mass-spectrometry
#11
Maja Veršić Bratinčević, Tanja Visković, Davorka Sutlović
The aim of this study was to determine the optimal biological sample and the optimal extraction technique for monitoring methadone concentrations in biological samples. We analysed methadone in serum and whole blood samples using gas chromatography/mass spectrometry (GC/MS). Before analysis, we compared five solid-phase extraction (SPE) and two liquid-liquid extraction (LLE) methods and determined that SPE with Supelco LC-18 in serum yielded the best extraction efficiency. The limit of detection was 10 ng mL-1 and the limit of quantification 25 ng mL-1...
December 20, 2017: Arhiv za Higijenu Rada i Toksikologiju
https://www.readbyqxmd.com/read/29337656/a-review-of-methodology-for-the-analysis-of-pyrethrin-and-pyrethroid-residues-in-food-of-animal-origin
#12
S Tuck, A Furey, S R H Crooks, M Danaher
Pyrethrin and pyrethroid pesticides are commonly used in crop protection and animal health, to control pests. As a result, they can potentially transfer into food if good agricultural practice is not followed or even due to accidental contamination. The analysis of these compounds has been widely reported in crops and the environment. However, the analysis of pyrethrin and pyrethroids has not been reported frequently in foods of animal origin, particularly animal tissues. The focus of this review is to report on pyrethrin and pyrethroid analysis including key aspects such as chemistry, choice of target matrix, sample preparation, chemical analysis, legislation and method validation...
January 16, 2018: Food Additives & Contaminants. Part A, Chemistry, Analysis, Control, Exposure & Risk Assessment
https://www.readbyqxmd.com/read/29335189/biofuel-production-and-phycoremediation-by-chlorella-sp-istla1-isolated-from-landfill-site
#13
Arti Mishra, Kristina Medhi, Neha Maheshwari, Shaili Srivastava, Indu Shekhar Thakur
The present study aims to investigate the biofuel production ability and potential of heavy metal remediation of Chlorella sp. ISTLA1 isolated from a landfill site. The strain was cultured in Bold's Basal medium at different concentration of NaHCO3 and pH. Response surface methodology was employed for the optimization of nutrient sources for higher lipid production. Under the optimized conditions, the yield of lipid and biomass was 365.42 and 833.14 mg L-1 respectively. GC-MS analysis of lipid indicated the presence of C8 to C31 organic compounds consisting mainly of palmitic acid (C16:0), stearic acid (C18:0) and oleic acid (C18:1)...
January 6, 2018: Bioresource Technology
https://www.readbyqxmd.com/read/29333862/pharmacokinetic-determination-and-analysis-of-nortriptyline-based-on-gc-ms-coupled-with-hollow-fiber-drop-to-drop-solvent-microextraction-technique
#14
Pratik Kumar Jagtap, Kavita Tapadia
AIM: A simple, sensitive and robust technique of hollow-fiber drop-to-drop solvent microextraction coupled with GC-MS has been successfully developed for the detection of antidepressant drug nortriptyline in human blood and urine samples. The recoveries of the drug from the spiked samples are found to be well within the range and appropriate to support the method. RESULTS: The LOD for the drug was obtained to be 0.007, 0.009 and 0.021 μg ml-1 in deionized water, urine and blood samples of human subjects, respectively...
January 15, 2018: Bioanalysis
https://www.readbyqxmd.com/read/29333042/gas-chromatography-mass-spectrometry-profiling-in-methanolic-and-ethyl-acetate-root-and-stem-extract-of-corbichonia-decumbens-forssk-exell-from-thar-desert-of-rajasthan-india
#15
Sunita Arora, Manju Saini
Background: Corbichonia decumbens (Forssk.) Exell (Molluginaceae), recently has moved to Lophiocarpaceae as per angiospermic plant group (APG) III system, is an annual or short-lived, dwarf, glabrous subshrub, prefers to grow on rocky places and on sand-stones in dry, hot areas of Rajasthan. This is the potential plant with medicinal properties. Vegetative organs under study show antioxidant, anti-inflammatory, antiulcer, antimicrobial, and antinociception activity. Objective: This study was carried out to identify the phytoconstituents present in the methanolic and ethyl-acetate extract of root and stem of C...
December 2017: Pharmacognosy Research
https://www.readbyqxmd.com/read/29332819/chemometric-analysis-of-nmr-and-gc-datasets-for-chemotype-characterization-of-essential-oils-from-different-species-of-ocimum
#16
João Vito B Freitas, Elenilson G Alves Filho, Lorena Mara A Silva, Guilherme J Zocolo, Edy S de Brito, Nilce V Gramosa
The genus Ocimum (Labiatae) comprises 30 species found in tropical and subtropical regions of the planet, of which species O. basilicum L. and O. gratissimum are widely used in food and traditional medicine. Phytochemical studies on Ocimum have revealed a number of essential oil chemotypes, for example, eugenol, methyl chavicol, linalool, and methyl cinnamate. Since essential oils are commercially assessed according to their content, the aim of this study was to develop a simple and precise method for their qualitative and quantitative analysis using NMR spectroscopy combined with chemometrics...
April 1, 2018: Talanta
https://www.readbyqxmd.com/read/29332697/acid-alteration-of-several-ignitable-liquids-of-potential-use-in-arsons
#17
Carlos Martín-Alberca, Héctor Carrascosa, Itxaso San Román, Luis Bartolomé, Carmen García-Ruiz
Ignitable liquids such as fuels, alcohols and thinners can be used in criminal activities, for instance arsons. Forensic experts require to know their chemical compositions, as well as to understand how different modification effects could impact them, in order to detect, classify and identify them properly in fire debris. The acid alteration/acidification of ignitable liquids is a modification effect that sharply alters the chemical composition, for example, of gasoline and diesel fuel, interfering in the forensic analysis and result interpretation...
January 2018: Science & Justice: Journal of the Forensic Science Society
https://www.readbyqxmd.com/read/29332691/ink-dating-part-i-statistical-distribution-of-selected-ageing-parameters-in-a-ballpoint-inks-reference-population
#18
Agnès Koenig, Céline Weyermann
The development of ink dating methods requires an important amount of work in order to be reliably applicable in practice. Major tasks include the definition of ageing parameters to monitor ink ageing. An adequate parameter should ideally fulfil the following criteria: it should evolve as a function of time in a monotonic way, be measurable in a majority of ink entries, be as accurate and reproducible as possible, and finally it should not be influenced too much by transfer and storage conditions. This work aimed at evaluating the potential of seven ageing parameters for ink dating purposes: the phenoxyethanol quantity, relative peak areas (RPA), three solvent loss ratios (R%, R%*, NR%) and two solvent loss parameters (RNORM, NRNORM)...
January 2018: Science & Justice: Journal of the Forensic Science Society
https://www.readbyqxmd.com/read/29331713/repeated-attempted-homicide-by-administration-of-drugs-documented-by-hair-analysis
#19
Valérie Baillif-Couniou, Christophe Bartoli, Caroline Sastre, Marjorie Chèze, Marc Deveaux, Georges Léonetti, Anne-Laure Pélissier-Alicot
Attempted murder by repeated poisoning is quite rare. The authors describe the case of a 62-year-old man who was admitted to an intensive care unit (ICU) for neurological disturbances complicated by inhalation pneumopathy. He presented a loss of consciousness while his wife was visiting him at the ICU (H0). Forty-eight hours later (H48), police officers apprehended the patient's wife pouring a liquid into his fruit salad at the hospital. Toxicological analyses of a blood sample and the infusion equipment (H0), as well as the fruit salad and its container (H48), confirmed the attempted poisoning with cyamemazine (H0) and hydrochloric acid (H48)...
January 5, 2018: Journal of Forensic and Legal Medicine
https://www.readbyqxmd.com/read/29331316/pharmacological-activities-of-the-organic-extracts-and-chemical-fatty-acids-composition-of-the-petroleum-ether-extract-from-haplophyllum-tuberculatum-leaves
#20
Assia Hamdi, Kaouther Majouli, Amal Abdelhamid, Hela Belghith, Imed Chraief, Abderrahman Bouraoui, Zohra Marzouk, Yvan Vander Heyden
ETHNOPHARMACOLOGICAL RELEVANCE: Haplophyllum tuberculatum is used in traditional medicine to treat many disorders including inflammation and pain. The aim of this study is to investigate the organic extracts from H. tuberculatum leaves against inflammation, gastric ulcer and pain. MATERIALS AND METHODS: Acute toxicity was studied in vivo to determine the toxic doses of the leaves organic extracts. Anti-inflammatory activity was also evaluated in vivo using carrageenan-induced paw edema in Wistar rats...
January 10, 2018: Journal of Ethnopharmacology
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