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Artykuły w czasopismach na temat „GC-MS Analysis of W”

Autor: Grafiati

Data publikacji: 3 czerwca 2025

Data aktualizacji: 31 lipca 2025

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1

Jurczak, Rafał. "Analiza mikrośladów trinadtlenku triacetonu (TATP) w fazie gazowej z zastosowaniem TD-GC/MS." Przegląd Bezpieczeństwa Wewnętrznego 13, no. 24 (2021): 250–76. http://dx.doi.org/10.4467/20801335pbw.21.007.13564.

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W artykule opisano metodykę wykrywania trinadtleneku triacetonu (TATP) w postaci par oraz śladów powierzchniowych z wykorzystaniem chromatografi gazowej sprzężonej ze spektrometrią mas wyposażoną w system do termodesorpcji (TD-GC/MS). Rozwiązania techniczne aparatury analitycznej umożliwiają wybór jednej z dwóch metod wprowadzenia par analitu w celu identyfikacji – pośrednio ze złoża TENAX TA lub bezpośrednio z obiektów badań. Dodatkowo zastosowanie elementu GERSTEL CIS odgrywającego rolę koncentratora substancji powoduje, że jest możliwa identyfikacja już nawet nanośladowych ilości TATP. W ar

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Ma, Y., M. D. Hays, C. D. Geron, J. T. Walker, and M. J. Gatari Gichuru. "Technical Note: Fast two-dimensional GC-MS with thermal extraction for anhydro-sugars in fine aerosols." Atmospheric Chemistry and Physics 10, no. 9 (2010): 4331–41. http://dx.doi.org/10.5194/acp-10-4331-2010.

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Abstract. A fast two-dimensional gas chromatography (GC-MS) method that uses heart-cutting and thermal extraction (TE) and requires no chemical derivatization was developed for the determination of anhydro-sugars in fine aerosols. Evaluation of the TE-GC-GC-MS method shows high average relative accuracy (≥90%), reproducibility (≤10% relative standard deviation), detection limits of less than 3 ng/μL, and negligible carryover for levoglucosan, mannosan, and galactosan markers. TE-GC-GC-MS- and solvent extraction (SE)-GC-MS-measured levoglucosan concentrations correlate across several diverse ty

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Ma, Y., M. D. Hays, C. D. Geron, J. T. Walker, and M. J. Gatari Gichuru. "Fast two-dimensional GC-MS with thermal extraction for anhydro-sugars in fine aerosols." Atmospheric Chemistry and Physics Discussions 10, no. 1 (2010): 153–82. http://dx.doi.org/10.5194/acpd-10-153-2010.

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Abstract. A fast two-dimensional gas chromatography (GC-MS) method that uses heart-cutting and thermal extraction (TE) and requires no chemical derivatization was developed for the determination of anhydro-sugars in fine aerosols. Evaluation of the TE-GC-GC-MS method shows high average relative accuracy (≥90%), reproducibility (≤10% relative standard deviation), detection limits of less than 3 ng/μL, and negligible carryover for levoglucosan, mannosan, and galactosan markers. TE-GC-GC-MS- and solvent extraction (SE)-GC-MS-measured levoglucosan concentrations correlate across several diverse ty

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4

Roach, John A. G. "Analysis of CLA derivatives by GC/MS." European Journal of Lipid Science and Technology 103, no. 9 (2001): 621–24. http://dx.doi.org/10.1002/1438-9312(200109)103:9<621::aid-ejlt6210>3.0.co;2-w.

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Gift Crucifix Pender, Bernard Guyah, Peter G. Mwitari, Inyani John L. Lagu, Mercy Jepkorir, and James H Ombaka. "Solanum aculeastrum Dunal berries: Phytochemical profiling and GC-MS analysis of methanolic extract and n-hexane, dichloromethane, ethyl acetate and n-butanol fractions." International Journal of Science and Research Archive 11, no. 1 (2024): 1933–58. http://dx.doi.org/10.30574/ijsra.2024.11.1.0250.

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Background: Solanum aculeastrum is reportedly used in several diseases including gonorrhea, bronchitis, jigger infestations and wounds, and cancers. We conducted an exhaustive phytochemical and GC-MS profiling of its methanol extract and solvents’ fractions. Methods: About 4500g of dried berries of S. aculeastrum was extracted with methanol, part of which was partitioned into fractions of n-hexane, dichloromethane, ethyl acetate, n-butanol and aqueous fractions. These fractional preparations were subjected to phytochemical and GC-MS profiling except aqueous fraction. Results: The percentage yi

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6

Podolec, Peter, Alexandra Hengerics Szabó, Viktória Ferenczy, et al. "Development of INCAT-GC-MS for analysis of metabolites in urine." Science and Technology Development Journal 19, no. 1 (2016): 106–13. http://dx.doi.org/10.32508/stdj.v19i1.615.

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This paper aims to develop a non-solvent microextraction technique using INCAT (Inside Needle Capillary Adsorption Trap) for GC-MS analysis of volatile metabolites in urine. INCATs with different sorbents were tested, resulting in an INCAT with 3 sorbent layers Chromosorb W+ 20% SE-54, Carbopack X and Carboxen 1000 (1 : 1 : 1), which proved to be the most suitable for differentiating and identifying volatile metabolites in urine samples of patients from those of healthy people.

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Yedomon, Brice Hervé, Isabelle Saves, Narjes Mtimet, et al. "Elionurus tristis Essential Oil: GC-MS Analysis and Antioxidant and Antituberculosis Activities." Natural Product Communications 12, no. 4 (2017): 1934578X1701200. http://dx.doi.org/10.1177/1934578x1701200436.

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Essential oil was obtained in a yield 1.1%, w/w, by steam distillation of Elionurus tristis leaves from Madagascar. The chemical composition was analyzed qualitatively and quantitatively by GC-MS and GC-FID, respectively. To the best of our knowledge, this is the first chemical analysis of this essential oil. Seventy-three compounds were identified, corresponding to 94.9% of the total essential oil. The principal compounds were sesquiterpenes and the more represented were β-gurjunene (18.4%), neoclovene (15.8%) and nootkatone (10.4%). Through a comparative study, we observed a large variabilit

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8

Souhoka, Fensia Analda, Andi Zulkifli Al Aziz, and Nazudin Nazudin. "Patchouli Oil Isolation and Identification of Chemical Components Using GC-MS." Indo. J. Chem. Res. 8, no. 2 (2020): 108–13. http://dx.doi.org/10.30598//ijcr.2020.8-fas.

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This research aims to isolate oil from patchouli (Pogostemon cablin Benth) and identify the chemical components of patchouli oil using Gas Chromatography-Mass Spectrometry (GC-MS). Patchouli plant samples were obtained from Welulu Village, Kolaka Regency, Southeast Sulawesi Province. Fresh patchouli leaves are dried in the sun for four days to a constant weight. Patchouli leaves water content is 77.41% (w/w). Dry patchouli leaves are distilled using the water and steam method for two hours. Water and oil distillates are separated using a separating funnel. Patchouli oil obtained was dried usin

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Souhoka, Fensia Analda, Andi Zulkifli Al Aziz, and Nazudin Nazudin. "Patchouli Oil Isolation and Identification of Chemical Components Using GC-MS." Indonesian Journal of Chemical Research 8, no. 2 (2020): 108–13. http://dx.doi.org/10.30598/ijcr.2020.8-fas.

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This research aims to isolate oil from patchouli (Pogostemon cablin Benth) and identify the chemical components of patchouli oil using Gas Chromatography-Mass Spectrometry (GC-MS). Patchouli plant samples were obtained from Welulu Village, Kolaka Regency, Southeast Sulawesi Province. Fresh patchouli leaves are dried in the sun for four days to a constant weight. Patchouli leaves water content is 77.41% (w/w). Dry patchouli leaves are distilled using the water and steam method for two hours. Water and oil distillates are separated using a separating funnel. Patchouli oil obtained was dried usin

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10

Fabjanowicz, Magdalena, and Justyna Płotka-Wasylka. "OZNACZANIE WYBRANYCH ZWIĄZKÓW BIOAKTYWNYCH W WINACH POLSKIEGO POCHODZENIA." Wiadomości Chemiczne 79, no. 1 (2025): 143–58. https://doi.org/10.53584/wiadchem.2025.1.8.

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Each wine has a unique chemical composition that is influenced by the grape variety, the geology and climate of the vine's growth (terroir), and the winemaking process. Despite the fact that several scientific reports have been published about the characteristic of wines from The Old and The New World Countries, data on the specific characteristics of wines from the cool climate regions is still lacking. The objective of this study was to develop analytical methods for evaluating the quality of domestically produced wines in terms of the concentration of specific bioactive compounds, such as:

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11

Budryn, G., E. Nebesny, J. Kula, T. Majda, and W. Krysiak. "HS-SPME/GC/MS profiles of convectively and microwave roasted Ivory Coast Robusta coffee brews." Czech Journal of Food Sciences 29, No. 2 (2011): 151–60. http://dx.doi.org/10.17221/69/2009-cjfs.

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Robusta coffee beans were convectively, microwave, and convectively-microwave heated at 230&deg;C, 700 W, and 230&deg;C/700 W (coupled heating), respectively, over periods of time ensuring the optimum sensory properties of the brews. HS-SPME/GC/MS analysis of the emissions from brews of the roasted coffee beans revealed 119 compounds. The highest total content of volatile substances was found in the brews prepared from convectively-microwave roasted coffee beans but the microwave roasting resulted in the most acceptable sensory properties of the brew aroma, presumably because of the lo

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12

Faßbender, Sebastian, Marcus von der Au, Maren Koenig, et al. "Species-specific isotope dilution analysis of monomethylmercury in sediment using GC/ICP-ToF-MS and comparison with ICP-Q-MS and ICP-SF-MS." Analytical and Bioanalytical Chemistry 413, no. 21 (2021): 5279–89. http://dx.doi.org/10.1007/s00216-021-03497-z.

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AbstractA recently introduced inductively coupled plasma-time-of-flight-mass spectrometer (ICP-ToF-MS) shows enhanced sensitivity compared to previous developments and superior isotope ratio precision compared to other ToF and commonly used single-collector ICP-MS instruments. Following this fact, an improvement for isotope dilution ICP-MS using the new instrumentation has been reported. This study aimed at investigating whether this improvement also meets the requirements of species-specific isotope dilution using GC/ICP-MS, where short transient signals are recorded. The results of the analy

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13

Batubara, R., S. M. Lubis, K. Aulia, et al. "Antioxidants and chemical compounds of hot water extract agarwood leaves Wikstroemia tenuiramis Miq." IOP Conference Series: Earth and Environmental Science 1115, no. 1 (2022): 012062. http://dx.doi.org/10.1088/1755-1315/1115/1/012062.

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Abstract One type of agarwood from the Wikstroemia genus is Wikstroemia tenuiramis Miq. The leaves have been used as raw materials for agarwood leaf tea. The aim of the research was to determine the antioxidant activity of W. tenuiramis Miq. agarwood leaf tea in ready-to-drink formulations and chemical compounds contained in hot water extract of agarwood leaf type W. tenuiramis Miq. The method of making tea by boiling for 7 minutes. Analysis of antioxidant activity test using the DPPH method. Gas Chromatography - Mass Spectrometry (GC-MS) instruments was used to analyze chemical compounds in h

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14

Umoh, Romanus A., Imoh I. Johnny, Nsima A. Andy, et al. "Microscopic, Micromeritic and Phytochemical Analysis of the Leaves of Pseuderanthemum maculatum (G. Lodd.) I. M. Turner, A Plant with Potential Pharmacognistic Uses." Asian Journal of Biochemistry, Genetics and Molecular Biology 16, no. 11 (2024): 18–29. http://dx.doi.org/10.9734/ajbgmb/2024/v16i11414.

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Background: Pseuderanthemum maculatum, Pseuderanthemum maculatum (G.Lodd.) I.M.Turner [previously Pseuderanthemum carruthersii (Seem.) Guillaumin var. carruthersii] is an ornamental plant with potential pharmacognostic uses in the management of hypertension and cancers. There hadn’t been much work done on this plant previously hence making the current research work very much significant. Methods: The leaves were collected, identified, air dried, pulverized, weighed and subjected to evaluation parameters using standard procedures. GC-MS analysis was also carried out on the dichloromethane extra

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15

Perangin-angin, Sabarmin. "Isolation and Analysis of Chemical Components of Garlic (Allium sativum L.) Tuber Essential Oil As Well As Antibacterial and Antioxidant Activity Tests." Journal of Chemical Natural Resources 4, no. 1 (2022): 18–27. http://dx.doi.org/10.32734/jcnar.v4i1.9363.

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The essential oil from garlic tubers (Allium sativum L) was isolated by hydrodistillation method using the Stahl apparatus. Garlic tubers were distilled for 4 to 5 hours to produce as much oil as 0.05% (w/ w). The chemical components of essential oil of garlic tubers were analyzed using GC-MS spectroscopy. The GC-MS results showed that there were 11 components with 5 main components, namely diallyl disulfide (44.98%), 1,3-diallyl tri sulfane (13.63%), allyl sulfide (13.06%), methyl allyl disulfide (11.87%), and methyl allyl trisulfide (4.84%). The antibacterial activity of essential oil of gar

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Chen, Nai-Dong, Nai-Fu Chen, Jun Li, Cai-Yun Cao, Jin-Mei Wang, and He-Ping Huang. "Similarity Evaluation of Different Origins and Species of Dendrobiums by GC-MS and FTIR Analysis of Polysaccharides." International Journal of Analytical Chemistry 2015 (2015): 1–8. http://dx.doi.org/10.1155/2015/713410.

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GC-MS method combined with FTIR techniques by the analysis of polysaccharide was applied to evaluate the similarity between wild (W) and tissue-cultured (TC)Dendrobium huoshanense(DHS),Dendrobium officinale(DO), andDendrobium moniliforme(DM) as well as 3 wildDendrobiumspp.:Dendrobium henanense(DHN),Dendrobium loddigesii(DL), andDendrobium crepidatum(DC). Eight monosaccharides involving xylose, arabinose, rhamnose, glucose, mannose, fructose, galactose, and galacturonic acid were identified in the polysaccharide from eachDendrobiumsample while the contents of the monosugars varied remarkably ac

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Mashuni, N. A. Yanti, M. Jahiding, L. O. Kadidae, R. Djaila, and F. H. Hamid. "Analysis of Liquid Volatile Matters from Coconut Shell Pyrolysis by GC-MS and Its Potential as Antifungal Agent." Asian Journal of Chemistry 32, no. 7 (2020): 1728–32. http://dx.doi.org/10.14233/ajchem.2020.21657.

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Indonesia is one of the highest producers of coconut in the world and at the same time coconut shell waste is also high. This study used gas chromatography-mass spectrometric (GC-MS) analysis for the liquid volatile matter (LVM) generated from coconut shell pyrolysis and to examine its potential as an antifungal agent. Pyrolysis was performed at 600 ºC. The LVM was 29% (v/w) and had pH 3 and 1.087 g mL-1 density. To determine chemical constituents using GC-MS, the standard NIST MS software was used. The spectrogram analysis of LVM revealed five main compounds, namely phenol (21.92%); (Z)-4-met

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Primpke, Sebastian, Marten Fischer, Claudia Lorenz, Gunnar Gerdts, and Barbara M. Scholz-Böttcher. "Comparison of pyrolysis gas chromatography/mass spectrometry and hyperspectral FTIR imaging spectroscopy for the analysis of microplastics." Analytical and Bioanalytical Chemistry 412, no. 30 (2020): 8283–98. http://dx.doi.org/10.1007/s00216-020-02979-w.

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AbstractAnalysis of microplastics (MP) in environmental samples is an emerging field, which is performed with various methods and instruments based either on spectroscopy or thermoanalytical methods. In general, both approaches result in two different types of data sets that are either mass or particle number related. Depending on detection limits of the respective method and instrumentation the derived polymer composition trends may vary. In this study, we compare the results of hyperspectral Fourier-transform infrared (FTIR) imaging analysis and pyrolysis gas chromatography-mass spectrometry

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Tan, Yun Nian, Jian Hua Zhang, and Wei Ning Chen. "GC-MS-Based Metabolomics Analysis of Prawn Shell Waste Co-Fermentation by Lactobacillus plantarum and Bacillus subtilis." Polysaccharides 1, no. 1 (2020): 31–50. http://dx.doi.org/10.3390/polysaccharides1010004.

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GC-MS-based metabolomics were used to investigate metabolic changes in prawn shell waste during fermentation. Microbial strains Lactobacillus plantarum and Bacillus subtilis were co-fermented in a shake flask comprising of 5% (w/v) prawn shell waste and 20% (w/v) glucose as a carbon source. Analysis of the prawn shell waste fermentation showed a total of 376 metabolites detected in the culture supernatant, including 14 amino acids, 106 organic acids, and 90 antimicrobial molecules. Results show that the liquid fraction of the co-fermentation is promising for harvesting valuable metabolites for

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Umoh, Romanus A., Imoh I. Johnny, Nsima A. Andy, et al. "Pharmacognostic Evaluation of the Leaves of Thurnbegia laevis Nees (Acanthaceae)." Asian Journal of Biochemistry, Genetics and Molecular Biology 15, no. 3 (2023): 91–103. http://dx.doi.org/10.9734/ajbgmb/2023/v15i3342.

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Thurnbegia laevis Nees. belong to the Acanthaceae family. It is used in folklore medicine for the management of diabetes, piles, joint pains as well as skin related problems. This study aims to evaluate the leaves of the plant by employing the quality control parameters. The leaves of T. laevis were collected, identified, air-dried, pulverized and stored in glass bottles. Standard procedures were used to carry out microscopy on the fresh leaves, micromeritics, chemomicroscopy, fluorescence analysis, soluble-extractive values, moisture contents and ash values using powdered samples of the leaf.

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Radulovic, Niko, Nevenka Djordjevic, and Radosav Palic. "Volatiles of Pleurospermum austriacum (L.) Hoffm. (Apiaceae)." Journal of the Serbian Chemical Society 75, no. 12 (2010): 1653–60. http://dx.doi.org/10.2298/jsc100323127r.

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This work presents the first results of detailed GC and GC-MS analyses of the volatile constituents from the fresh leaves, fruits and stalks of an endangered plant species Pleurospermum austriacum (L.) Hoffm. (Apiaceae). Sesquiterpene hydrocarbons made up ca. 4/5 of the oils obtained in low yield (0.003-0.086%, w/w). The major volatiles detected were germacrene D (66.5, 62.4 and 49.0 % in fruits, leaves and stalks, respectively), ?-caryophyllene (3.1-5.7 %), ?-cadinene (3.6-5.0 %) and (E)-?-farnesene (1.0-1.5 %).

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Purkan, Purkan, Ersalina Nidianti, Abdulloh Abdulloh, et al. "Biodiesel Production by Lipids From Indonesian strain of Microalgae Chlorella vulgaris." Open Chemistry 17, no. 1 (2019): 919–26. http://dx.doi.org/10.1515/chem-2019-0102.

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AbstractThe fatty acid methyl ester (FAME) production from Chlorella vulgaris has been studied by sequential investigation such as microalgae culturing, lipid extraction, and lipid conversion to FAME. The C. vulgaris could grow well in the BG-11 medium and had a doubling time 3.7 days for its growth using inocula 16% (v/v). The optimum of dry cell biomass as 11.6 g/L was obtained after the microalgae culture harvested for 6 days. Lipid extraction from the biomass was carried out in various solvents and ultrasonication power, resulted lipid as 31% (w/w) when extracted with a mixed solvent of n-

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Lingfa, Lali, and Srinivas Ankanagari. "GC-MS Profiling of Reproductive Stage Withania somnifera for Antimicrobial and Anticancer Phytochemicals." Biomedical and Pharmacology Journal 16, no. 1 (2023): 197–211. http://dx.doi.org/10.13005/bpj/2601.

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Withanias omnifera also known as Indian ginseng is commonly found in India and other Southeast Asian countries. Various parts of this plant have been used as herbal medicine to treat a variety of diseases. However, there is a lacuna in the profiling of phytochemical constituents present in the different parts of the plant at reproductive stage. To identify phytochemicals present in the methanolic extracts of leaf, root, and stem parts of W. somnifera at reproductive stage using GC-MS analysis. Methods: The airdried parts of plant (leaf, stem and root) were extracted with methanol and concentra

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Ouakouak, H., M. Chohra, and M. Denane. "Chemical Composition, Antioxidant Activities of the Essential Oil of Mentha pulegium L, South East of Algeria." International Letters of Natural Sciences 39 (May 2015): 49–55. http://dx.doi.org/10.18052/www.scipress.com/ilns.39.49.

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Aerial parts of Mentha pulegium L. collected from south east of Algeria (Reguiba, El-Oued) possessed an essential oil in 2.34% (v/w) yield. GC and GC-MS analysis of the oil revealed recognition of Thirty-seven compounds, representing 95.02% (area percent) of the total oil composition. Oil was rich in Oxygenated hydrocarbons, exhibited higher percentage of Pulegone (46.31%) followed by Piperitenone (23.3%), Menthone (6.2%) and Limonene (4.7%). The antioxidant activity by DPPH free radical scavenging bioassay (IC50 = 157 µl/ml).

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Ouakouak, H., M. Chohra, and M. Denane. "Chemical Composition, Antioxidant Activities of the Essential Oil of <i>Mentha pulegium</i> L, South East of Algeria." International Letters of Natural Sciences 39 (May 12, 2015): 49–55. http://dx.doi.org/10.56431/p-9vs2p8.

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Aerial parts of Mentha pulegium L. collected from south east of Algeria (Reguiba, El-Oued) possessed an essential oil in 2.34% (v/w) yield. GC and GC-MS analysis of the oil revealed recognition of Thirty-seven compounds, representing 95.02% (area percent) of the total oil composition. Oil was rich in Oxygenated hydrocarbons, exhibited higher percentage of Pulegone (46.31%) followed by Piperitenone (23.3%), Menthone (6.2%) and Limonene (4.7%). The antioxidant activity by DPPH free radical scavenging bioassay (IC50 = 157 µl/ml).

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Adnan, Muhammad, Taj Ur Rahman, Ali Bahadur, et al. "The Effect of AlI3 Nanoadditive on the Thermal Behavior of PMMA Subjected to Thermoanalytical Py-GC-MS Technique." Materials 14, no. 22 (2021): 7036. http://dx.doi.org/10.3390/ma14227036.

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Thermal degradation of polymethylmethacrylate (PMMA) was studied by using inorganic salt of aluminum triiodide (AlI3). The composites of PMMA were prepared with AlI3 by changing the concentration of the AlI3 additive from 2% to 10% (w/w). The PMMA composites with AlI3 were characterized by TGA, DTG, SEM, FTIR, HBT, and Py-GC-MS techniques. The FTIR peaks of PMMA composite at 1316, 786, and 693 cm−1 justify the chemical association between PMMA and AlI3. TGA study shows that the stability of PMMA is enhanced by the addition of the AlI3 additive. SEM analysis represented that there is a relation

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Roinestad, Kurt S., Judith B. Louis, and Joseph D. Rosen. "Determination of Pesticides in Indoor Air and Dust." Journal of AOAC INTERNATIONAL 76, no. 5 (1993): 1121–26. http://dx.doi.org/10.1093/jaoac/76.5.1121.

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Abstract Improved analytical and sampling methods were developed for the multiresidue determination of pesticides in indoor air. Air analysis consists of adsorption of the pesticides in 1 m3 of air onto Tenax TA via an air sampling pump, desorption with acetone, and determination and quantitation by gas chromatography/mass spectrometry (GC/MS) with chemical ionization on an ion trap mass spectrometer. Limits of detection for the 23 pesticides studied ranged from 0.5 ng/m3 for chlorpyrifos and diazinon to 30 ng/m3 for o-phenylphenol (approximately 0.5-30 parts per trillion on a w/w basis). A si

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Tangjitjaroenkun, Janpen. "EVALUATION OF ANTIOXIDANT, ANTIBACTERIAL, AND GAS CHROMATOGRAPHY-MASS SPECTROMETRY ANALYSIS OF ETHYL ACETATE EXTRACT OF STREPTOMYCES OMIYAENSIS SCH2." Asian Journal of Pharmaceutical and Clinical Research 11, no. 7 (2018): 271. http://dx.doi.org/10.22159/ajpcr.2018.v11i7.25692.

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Objective: The aim of this study was to evaluate the antibacterial and antioxidant properties of ethyl acetate extract of Streptomyces omiyaensis SCH2. The chemical constituents of the extract were investigated using gas chromatography-mass spectrometry (GC-MS).Methods: Secondary metabolites from S. omiyaensis were produced by submerge fermentation using ISP2 medium with 3% NaCl (w/v) for 21 days. The culture filtrate was extracted with ethyl acetate. The chemical constituents were detected in the GC-MS analysis. Antibacterial activity was performed using disc diffusion and broth microdilution

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Rowe, Patricia M., Mahendra Kumar Trivedi, Gopal Nayak, Alice Branton, and Dahryn Trivedi. "LC-MS, GC-MS, and NMR Spectroscopic Analysis of Withania somnifera (Ashwagandha) Root Extract After Treatment with the Energy of Consciousness (The Trivedi Effect®)." European Journal of Biophysics 5, no. 2 (2017): 27–37. https://doi.org/10.5281/zenodo.845638.

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Withania somnifera (Ashwagandha) root extract is very popular ancient herbal medicine. The current study was designed to investigate the impact of The Trivedi Effect® - Energy of Consciousness Healing Treatment on the structural characterization of the ashwagandha root extract using LC-MS, GC-MS, and NMR spectroscopy. Ashwagandha root extract was divided into two parts – one part was control, without any Biofield Energy Healing Treatment, while another part was treated with the Biofield Energy Healing Treatment remotely by eighteen renowned Biofield Energy Healers and defined as the Biofield E

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Henderson, Sally Jean, Mahendra Kumar Trivedi, Gopal Nayak, Alice Branton, and Dahryn Trivedi. "LC-MS, GC-MS, and NMR Spectroscopic Analysis of Withania somnifera (Ashwagandha) Root Extract After Treatment with the Energy of Consciousness (The Trivedi Effect®)." European Journal of Biophysics 5, no. 2 (2017): 27–37. https://doi.org/10.5281/zenodo.847996.

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Withania somnifera (Ashwagandha) root extract is very popular ancient herbal medicine. The current study was designed to investigate the impact of The Trivedi Effect® - Energy of Consciousness Healing Treatment on the structural characterization of the ashwagandha root extract using LC-MS, GC-MS, and NMR spectroscopy. Ashwagandha root extract was divided into two parts – one part was control, without any Biofield Energy Healing Treatment, while another part was treated with the Biofield Energy Healing Treatment remotely by eighteen renowned Biofield Energy Healers and defined as the Biofield E

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Maccelli, Alessandro, Luca Vitanza, Anna Imbriano, et al. "Satureja montana L. Essential Oils: Chemical Profiles/Phytochemical Screening, Antimicrobial Activity and O/W NanoEmulsion Formulations." Pharmaceutics 12, no. 1 (2019): 7. http://dx.doi.org/10.3390/pharmaceutics12010007.

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Chemical fingerprints of four different Satureja montana L. essential oils (SEOs) were assayed by an untargeted metabolomics approach based on Fourier-transform ion cyclotron resonance (FT-ICR) mass spectrometry (MS) coupled with either electrospray ionization or atmospheric pressure chemical ionization ion sources. Analysis and relative quantification of the non-polar volatile fraction were conducted by gas chromatography (GC) coupled to MS. FT-ICR MS confirmed significant differences in the polar metabolite composition, while GC-MS analyses confirmed slight fluctuations in the relative amoun

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LİNGFA, Lali, Aravinda TİRUMALA, and Srinivas ANKANAGARİ. "GC-MS profiling of anticancer and antimicrobial phytochemicals in the vegetative leaf, root, and stem of Withania somnifera (L.) Dunal." International Journal of Secondary Metabolite 11, no. 1 (2023): 63–77. http://dx.doi.org/10.21448/ijsm.1256932.

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Withania somnifera has been used for a long time in traditional medicine. Its crude extract, dried powder, and purified metabolites from mature plants have shown promising therapeutic potential. To further investigate its potential, the detection of phytochemicals with anticancer and antimicrobial properties in the vegetative stage is essential. Hence, this study was done to identify phytochemical constituents using GC-MS analysis for anticancer and antimicrobial activities in the vegetative stage from methanolic extracts of stem, leaf, and root in W. somnifera. The air-dried plant parts were

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Giorgetti, Arianna, Lukas Mogler, Sebastian Halter, et al. "Four cases of death involving the novel synthetic cannabinoid 5F-Cumyl-PEGACLONE." Forensic Toxicology 38, no. 2 (2019): 314–26. http://dx.doi.org/10.1007/s11419-019-00514-w.

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Abstract Purpose Cumyl-PEGACLONE was the first synthetic cannabinoid (SC) with a γ-carbolinone core structure detected in forensic casework and, since then, it has dominated the German SC-market. Here the first four cases of death involving its fluorinated analog, 5F-Cumyl-PEGACLONE, a recently emerged γ-carbolinone derived SC, are reported. Methods Complete postmortem examinations were performed. Postmortem samples were screened by immunoassay, gas chromatography mass spectrometry (GC–MS) or liquid chromatography tandem mass spectrometry. For quantification of SCs, the standard addition metho

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Sayali, Gade*, Ravindra Jadhav Dr., and Sunayana Vikhe Dr. "PHYTOCHEMICAL STUDIES AND ANTIUROLITHIATIC ACTIVITY OF VITEX NEGUNDO LINN ROOT EXTRACTS." World Journal of Pharmaceutical Science and Research 2, no. 5 (2023): 104–14. https://doi.org/10.5281/zenodo.10926310.

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Background: Vitex negundo has many uses in Ayurveda, Homeopathy, and Allopathy to treat several diseases like venereal diseases, Urinary problems, cough and fever, asthmatic pain, female reproductive problems. Purpose: This study aimed to perform the comparative phytochemical study, chromatographic profiling, and Antiurolithiatic activity of Vitex negundo linn root extracts. Methods: Using maceration extraction, Successive reflux condensation extraction processes were used to prepare petroleum ether, methanol, aqueous, and alcoholic extracts. Preliminary phytochemical study were carried out in

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Phromphithak, Sanphawat, Thossaporn Onsree, Ruetai Saengsuriwong, and Nakorn Tippayawong. "Compositional analysis of bio-oils from hydrothermal liquefaction of tobacco residues using two-dimensional gas chromatography and time-of-flight mass spectrometry." Science Progress 104, no. 4 (2021): 003685042110644. http://dx.doi.org/10.1177/00368504211064486.

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Sustainable energy from biomass is one of the most promising alternative energy sources and is expected to partially replace fossil fuels. Tobacco industries have normally rid their processing residues by landfilling or incineration, affecting the environment negatively. These residues can be used to either extract high-value chemicals or generate bio-energy via hydrothermal liquefaction. The main liquid product or bio-oil consists of highly complicated chemicals. In this work, the bio-oil from hydrothermal liquefaction of tobacco processing residues was generated in a batch reactor at biomass

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Sahu, Dileswar, Ram Babu, Srinivas Acharya, Shasank S. Swain, and Gyanranjan Mahalik. "Antibacterial Activity, Toxicity and Drug-Likeness Profiles of Woodfordia fruticosa-Derived Metabolites Using Computational-Aided Drug Design Platform." International Journal of Experimental Research and Review 42 (August 30, 2024): 249–61. http://dx.doi.org/10.52756/ijerr.2024.v42.022.

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This study presents a comprehensive investigation into the phytoconstituents reported from Woodfordia fruticosa (L.) Kurz leaf and flower extracts using gas chromatography-mass spectrometry (GC-MS) analysis, along with some existing phytochemicals, to explore their potential antibacterial properties through molecular docking studies. Followed by bio-assay-guided leave and flower extraction with two solvent systems, i.e., methanol (polar) and petroleum ether (non-polar), was used and further subjected to GC-MS to identify and quantify various secondary metabolites. Based on spectral intensity a

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Thirubuvanesvari-Duraivelu, Pushpa, Siti Salwa Abd Gani, Masriana Hassan, et al. "Ultrasonication and RSM-based optimization of antioxidant activity, saccharide composition and fatty acids from Phoenix dactylifera L. Medjool date seeds influenced by ethanol." Bulletin of the Chemical Society of Ethiopia 38, no. 3 (2024): 547–62. http://dx.doi.org/10.4314/bcse.v38i3.1.

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In response with the demand in date industry finding on sustainable solution for date seeds management and its bioactive rich constituent, current study envisaged the optimum condition for the ultrasound extraction of Phoenix dactylifera L. Medjool date seeds and its antioxidative activity by employing a three-level three-factor Box–Behnken design via response surface methodology (RSM). Ethanol (EtOH) concentration (50-80%), time (30-90 min) and temperature (40-70 °C) were the independent variables investigated for ABTS•+ scavenging antioxidant activity and subjected to analysis of variance (A

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Custódio, Dayana Lacerda, Rafaela Pinheiro Burgo, Bárbara Moriel, et al. "Antimicrobial activity of essential oils from Pimenta pseudocaryophyllus and Tynanthus micranthus." Brazilian Archives of Biology and Technology 53, no. 6 (2010): 1363–69. http://dx.doi.org/10.1590/s1516-89132010000600013.

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The present study describes the chemical composition and antimicrobial activity of essential oils obtained by hydrodistillation from the leaves of Pimenta pseudocaryophyllus (1.0% w/w) and Tynanthus micranthus (1.1% w/w). GC and GC/MS analysis demonstrated that eugenol was the only component in the T. micranthus essential oil (99.9%) and the major component in the P. pseudocaryophyllus essential oil (92.59%), which also presented methyleugenol, terpinen-4-ol, o-cymene and (E)-caryophyllene, among others. Both the oils presented antimicrobial activity against bacteria, yeast and filamentous fun

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Surbakti, Darwis, and Dedy Christopher Simangunsong. "Chemical Components Analysis of Kencur (Kaempreria galanga L) Essential Oil Using GC-MS Method and Its Insecticide Tests on Fruit Fly (Bactrocera sp.)." Journal of Chemical Natural Resources 5, no. 1 (2023): 13–17. http://dx.doi.org/10.32734/jcnar.v5i1.11986.

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The hydrodistillation method isolated the essential oils of Kencur (Kaempreria galanga L) using the Stahl apparatus. It was distilled for ± 5-6 hours to produce as much as 0.89% (w/w) essential oil. The chemical components of Kencur essential oil were analyzed using GC-MS, consisting of 7 compounds which seven compounds could be identified, name: Limonene (2.39%), Cineol (2.22%), and terpenes (0.80%). Hexane (1.51%), Borneol (13.23%), Methyl cinnamate (1.50%), ethyl ester (78.35%) and its insecticide test from Kencur essential oil showed Bactrocera sp. mortality. The highest was 96.7% in the 3

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Uchôa Lopes, Cristiane Marinho, João Ricardhis Saturnino de Oliveira, Vanderlan Nogueira Holanda, et al. "GC-MS Analysis and Hemolytic, Antipyretic and Antidiarrheal Potential of Syzygium aromaticum (Clove) Essential Oil." Separations 7, no. 2 (2020): 35. http://dx.doi.org/10.3390/separations7020035.

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Clove (Syzygium aromaticum) is a spice widely used for its medical properties, though the species lacks scientific evidence regarding its toxicity and biologic effects. The aim of this study was the chemical identification by GC-MS analysis and evaluation of the hemolytic, anticoagulant, antidiarrheal and antipyretic activities of the essential oil from S. aromaticum (EOSa) in adult male mice. Essential oil was obtained by hydrodistillation and provided 9.8% v/w yield. GC-MS analyses allowed the identification of nine constituents, with eugenol (84.63%) as the majority. EOSa was diluted in sev

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Arya, Pooja. "Phytochemical Analysis and Antimicrobial Evaluation of Essential Oils from Eucalyptus tereticornis Sm." International Journal for Research in Applied Science and Engineering Technology 12, no. 7 (2024): 1196–201. http://dx.doi.org/10.22214/ijraset.2024.63753.

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Abstract: This study investigates the phytochemical composition and antimicrobial properties of essential oils extracted from Eucalyptus tereticornis Sm. Using gas chromatography-mass spectrometry (GC-MS) and in vitro antimicrobial assays. Essential oils were extracted from the leaves of Eucalyptus tereticornis through hydrodistillation, yielding 2.5% (v/w) of oil. GC-MS analysis identified 32 compounds, with 1,8-cineole (45.2%), α-pinene (15.8%), and β-pinene (9.3%) being the predominant constituents. The antimicrobial activity of the essential oils was tested against a range of pathogenic mi

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Salters, Stephen P., Mahendra Kumar Trivedi, Gopal Nayak, Alice Branton, and Dahryn Trivedi. "LC-MS, GC-MS, and NMR Spectroscopic Analysis of Withania somnifera (Ashwagandha) Root Extract After Treatment with the Energy of Consciousness (The Trivedi Effect®)." European Journal of Biophysics 5, no. 2 (2017): 27–37. https://doi.org/10.5281/zenodo.853511.

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Withania somnifera (Ashwagandha) root extract is very popular ancient herbal medicine. The current study was designed to investigate the impact of The Trivedi Effect® - Energy of Consciousness Healing Treatment on the structural characterization of the ashwagandha root extract using LC-MS, GC-MS, and NMR spectroscopy. Ashwagandha root extract was divided into two parts – one part was control, without any Biofield Energy Healing Treatment, while another part was treated with the Biofield Energy Healing Treatment remotely by eighteen renowned Biofield Energy Healers and defined as the Biofield E

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Kamel, Rabab, Sherif M. Afifi, Amr M. Abdou, Tuba Esatbeyoglu, and Mona M. AbouSamra. "Nanolipogel Loaded with Tea Tree Oil for the Management of Burn: GC-MS Analysis, In Vitro and In Vivo Evaluation." Molecules 27, no. 19 (2022): 6143. http://dx.doi.org/10.3390/molecules27196143.

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The GC-MS analysis of tea tree oil (TTO) revealed 38 volatile components with sesquiterpene hydrocarbons (43.56%) and alcohols (41.03%) as major detected classes. TTO efficacy is masked by its hydrophobicity; nanoencapsulation can address this drawback. The results showed that TTO-loaded solid lipid nanoparticles (SLN1), composed of glyceryl monostearate (2% w/w) and Poloxamer188 (5% w/w), was spherical in shape with a core-shell microstructure. TTO-SLN1 showed a high entrapment efficiency (96.26 ± 2.3%), small particle size (235.0 ± 20.4 nm), low polydispersity index (0.31 ± 0.01), and high n

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Tran Van, Hien, Binh Khuat Hoang, and Duy Anh Nguyen. "Microwave-assisted pyrolysis of plastic waste for liquid oil production." Journal of Military Science and Technology 98 (October 25, 2024): 78–85. http://dx.doi.org/10.54939/1859-1043.j.mst.98.2024.78-85.

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In this work, the article presents the results of the production of fuel oil from plastic waste using microwave-assisted pyrolysis. Under the influence of microwave power, microwave absorption material, time, catalyst, polyethylene (PE), polypropylene (PP), polystyrene (PS) and mixture (34% PE + 33% PP + 33 wt% PS) were pyrolyzed to liquid oil. The results showed that with 500 g of raw plastic, 500 W microwave power, and 120 minutes, the carbon absorber accounted for 10 wt% (compared to plastic), catalysts accounted for 20 wt%, fuel efficiency reached 84% with PS and PP, 83% with PE, and 83.5%

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Hidawati, Rossy Choerun Nissa, Akbar Hanif Dawam, and Dyah Marganingrum. "Preliminary study on seaweed fermentation for lactic acid production." IOP Conference Series: Earth and Environmental Science 1017, no. 1 (2022): 012013. http://dx.doi.org/10.1088/1755-1315/1017/1/012013.

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Abstract Indonesia is a maritime country that is rich in seaweed. However, seaweed fermentation into lactic acid is not yet usually. Seaweed fermentation has outstanding potential because it has the most abundant polysaccharides compared to other sources. This research aims to synthesize lactic acid by fermentation using a single culture of Lactobacillus plantarum (L. plantarum) and two substrates, namely seaweed flour and refined salt Kappa-Carrageenan (RKC). Lactic acid was analyzed by fourier-transform infrared (FT-IR) spectroscopy and its concentration was determined by gas chromatography-

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Hidawati, Rossy Choerun Nissa, Akbar Hanif Dawam, and Dyah Marganingrum. "Preliminary study on seaweed fermentation for lactic acid production." IOP Conference Series: Earth and Environmental Science 1017, no. 1 (2022): 012013. http://dx.doi.org/10.1088/1755-1315/1017/1/012013.

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Abstract Indonesia is a maritime country that is rich in seaweed. However, seaweed fermentation into lactic acid is not yet usually. Seaweed fermentation has outstanding potential because it has the most abundant polysaccharides compared to other sources. This research aims to synthesize lactic acid by fermentation using a single culture of Lactobacillus plantarum (L. plantarum) and two substrates, namely seaweed flour and refined salt Kappa-Carrageenan (RKC). Lactic acid was analyzed by fourier-transform infrared (FT-IR) spectroscopy and its concentration was determined by gas chromatography-

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Robotti, Elisa, Federica Campo, Marta Riviello, et al. "Optimization of the Extraction of the Volatile Fraction from Honey Samples by SPME-GC-MS, Experimental Design, and Multivariate Target Functions." Journal of Chemistry 2017 (2017): 1–14. http://dx.doi.org/10.1155/2017/6437857.

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Head space (HS) solid phase microextraction (SPME) followed by gas chromatography with mass spectrometry detection (GC-MS) is the most widespread technique to study the volatile profile of honey samples. In this paper, the experimental SPME conditions were optimized by a multivariate strategy. Both sensitivity and repeatability were optimized by experimental design techniques considering three factors: extraction temperature (from 50°C to 70°C), time of exposition of the fiber (from 20 min to 60 min), and amount of salt added (from 0 to 27.50%). Each experiment was evaluated by Principal Compo

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Tadini, Maraine Catarina, Antônio José Ipólito, and Marcelo Firmino de Oliveira. "Voltammetric MDMA Analysis of Seized Ecstasy Samples." Psychoactives 2, no. 4 (2023): 359–72. http://dx.doi.org/10.3390/psychoactives2040023.

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(1) Background: 3,4-Methylenedioxymethamphetamine (MDMA) is an illicit drug that is sold as ecstasy. We aimed to develop a voltammetric method based on a chemically modified electrode (CME) to analyze MDMA. (2) Methods: The CME was evaluated with respect to the percentage of modifier, pre-concentration time, electroanalytical parameters, and selectivity. Then, the performance of the new voltammetric method was compared to the performance of color tests and chromatographic analyses (GC-MS and UPLC-MS) during the analysis of 11 seized ecstasy batches. (3) Results: The modifier percentage (v/v) o

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Putri, Karina Octaria, Dhani Nur Miftahudin, Zuchra Helwani, and Syaiful Bahri. "Activation of Cement Clinker as Catalysts for Transesterification Reaction of Palm Oil Off Grade to Biodiesel." Jurnal Rekayasa Kimia & Lingkungan 14, no. 2 (2019): 147–54. http://dx.doi.org/10.23955/rkl.v14i2.14704.

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Calcium oxide (CaO) is a heterogeneous solid base which is generally used as a catalyst in making biodiesel. It is mainly obtained from cement clinker and activated through calcination method. The purpose of this study was to determine the effect of using cement clinker catalyst on the yield of the biodiesel. A batch reactor with a condenser was used in making the biodiesel under favorable conditions such as calcination temperatures of 700 °C, 750 °C and 800 °C, time of 5, 6 and 7 hours, and catalyst concentration of 1%-w, 2%-w, and 3%-w oil. The analysis involved X-Ray Diffraction (XRD) and B

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Asranudin, Asranudin, Surya Rosa Putra, Adi Setyo Purnomo, et al. "Polyhydroxyalkanoates Production from Ralstonia Pickettii Bacteria: Structural and Mechanical Studies." Journal of Fibers and Polymer Composites 1, no. 2 (2022): 131–47. http://dx.doi.org/10.55043/jfpc.v1i2.53.

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Bacterial Polyhydroxyalkanoates (PHAs) are a remarkably versatile category of biodegradable polymers with a variety of applications in the packaging, agricultural, biomedical, and pharmaceutical fields. In the present study, bacterial PHAs films are characterized by Fourier transform infrared (FTIR), Scanning electron microscope (SEM), Gas chromatography-mass spectroscopy (GC-MS), Differential scanning calorimetry (DSC), and Universal testing machine (UTM). It was found that almost 20% (w/w) of PHAs was produced from Ralstonia pickettii, and the five major types of the produced polymer were va

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