Sulfur Analysis of Bolu-Mengen Lignite before and after Microbiological Treatment Using Reductive Pyrolysis and Gas Chromatography/Mass Spectrometry

2005 ◽  
Vol 19 (3) ◽  
pp. 1029-1036 ◽  
Author(s):  
S. Mullens ◽  
J. Yperman ◽  
R. Carleer ◽  
T. Bozdemir ◽  
T. Durusoy ◽  
...  
Keyword(s):  
Mass Spectrometry ◽  
Gas Chromatography ◽  
Gas Chromatography Mass Spectrometry ◽  
Chromatography Mass Spectrometry ◽  
Before And After ◽  
Microbiological Treatment

scholarly journals Serum Metabolic Profiling Analysis of Gout Patients Treated with Traditional Chinese Medicine Tongfengtai Granules Based on Gas Chromatography-Mass Spectrometry

2020 ◽  
Vol 2020 ◽  
pp. 1-7
Author(s):  
Jianyong Zhang ◽  
Hong Pan ◽  
Jingjing Xie ◽  
Jing Wang ◽  
Ruyi Wang ◽  
...  
Keyword(s):  
Mass Spectrometry ◽  
Gas Chromatography ◽  
Chinese Medicine ◽  
Traditional Chinese Medicine ◽  
Metabolic Profiling ◽  
Metabolic Pathways ◽  
Gas Chromatography Mass Spectrometry ◽  
Chromatography Mass Spectrometry ◽  
Before And After ◽  
Metabolic Biomarkers

Gout has become a public health problem that seriously threatens human health. Traditional Chinese medicines (TCMs) have a long history of treating gout and have some advantages compared with the conventional medicines. Compound TCM Tongfengtai granules are gradually being used for clinical treatment of gout, but its mechanism is still unclear. The purpose of this study was to explore the metabolic profiling of serum from gout patients before and after treatment with Tongfengtai granules and identify the differential metabolites and related metabolic pathways. A total of 40 gout patients hospitalized in Shenzhen Traditional Chinese Medicine Hospital from 2018 to March 2019 were recruited in the current study, and serum samples from these patients before and after treatment with Tongfengtai granules were collected. Gas chromatography-mass spectrometry (GC-MS) assay was used to identify serum metabolites. The OPLS-DA VIP method was used to screen for potential metabolic biomarkers, and MetaboAnalyst 4.0 was used to identify related metabolic pathways. The result showed that there was a significant difference in the concentrations of six metabolites in the serum after treatment: D-galactose, lactic acid, 3-hydroxybutyric acid, D-pyran (type) glucose, alanine, and L-isoleucine. Except D-pyran (type) glucose, the serum concentrations of the other five metabolites were all significantly reduced. Besides, pathway enrichment analysis found that these potential metabolic biomarkers were mainly involved in lactose degradation and the glucose-alanine cycle. Thus, the serum metabolic profiling of gout patients treated with Tongfengtai granules changed, and the differential metabolites and related metabolic pathways might provide clues for understanding the mechanism of Tongfengtai granules.

Effects of Reprocessing on Additives in ABS Plastics, Detected by Gas Chromatography/Mass Spectrometry

2012 ◽  
Vol 28 (1) ◽  
pp. 1-14 ◽  
Author(s):  
X. Bai ◽  
B.K. Stein ◽  
K. Smith ◽  
D.H. Isaac
Keyword(s):  
Mass Spectrometry ◽  
Gas Chromatography ◽  
Acrylonitrile Butadiene Styrene ◽  
Gas Chromatography Mass Spectrometry ◽  
Chromatography Mass Spectrometry ◽  
Plastic Processing ◽  
Before And After ◽  
Additive Loss ◽  
Recycled Plastics ◽  
Abs Plastics

Acrylonitrile–butadiene–styrene (ABS) plastic is a widely used engineering thermoplastic. ABS is also an interesting material for recycling. In the present study, two pieces of ABS plastic from waste computer equipment were reprocessed. A torque rheometer was used to simulate reprocessing. To identify the additives used in the recycled ABS plastics and understand the effect of reprocessing on the recycled plastics from several aspects, gas chromatography/mass spectrometry (GC/MS) was used to analyse the extracts from recycled ABS plastics before and after reprocessing. The effects of reprocessing temperature and reprocessing cycle on some additives, mainly antioxidants and lubricants, were investigated. Plastic processing led to additive loss because of volatilisation, decomposition, or conversion, particularly at high temperatures and during multiple processing cycles.

Novel Applications for Biomaterials: The Case of Remediation of Wine Taints Using Poly-Lactic Acid Polymer

2015 ◽  
Vol 749 ◽  
pp. 70-73 ◽  
Author(s):  
Andreea Botezatu ◽  
Gary James Pickering
Keyword(s):  
Mass Spectrometry ◽  
Gas Chromatography ◽  
Lactic Acid ◽  
Solid Phase ◽  
Alcoholic Beverage ◽  
Film Surface ◽  
Gas Chromatography Mass Spectrometry ◽  
Poly Lactic Acid ◽  
Chromatography Mass Spectrometry ◽  
Before And After

Wine is the world’s oldest alcoholic beverage and the most consumed in at least 20 countries. However, taints detract from its quality and acceptance, significantly reducing the value of wine. In this study we investigated the capacity of a poly-lactic acid (PLA) biopolymer to reduce concentrations of four odorants responsible for tainting many red wines: isopropyl-methoxypyrazine (IPMP), isobutyl–methoxypyrazine (IBMP), 4-ethylphenol (4-EP) and 4-ethylguaiacol (4-EG). Red wine was spiked with either IPMP [20 ng/L] and IBMP [20 ng/L] (Study 1) or 4-EP [200 ug/L] and 4-EG [200 ug/L] (Study 2) and then treated with a PLA film [surface area 350 cm2/L]. Solid Phase Micro-Extraction Multi-Dimensional Gas Chromatography–Mass Spectrometry and Gas Chromatography-Mass Spectrometry were used to measure the methoxypyrazines and ethylphenols, respectively, both before and after treatment with PLA. Results showed significant reductions in all of the target odorants after 8hrs treatment: IPMP (51%), IBMP (26%), 4-EP (21%) and 4-EG (20%). Taken overall, the data suggest potential for the use of PLA in treating common wine faults, particularly ‘ladybug taint’, which is caused by elevated levels of IPMP.

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