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Journal articles on the topic 'Gas chromotography'

Author: Grafiati
Published: 4 June 2021
Last updated: 15 February 2022

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1

EVERSHED, RICHARD P., MARK C. PRESCOTT, L. JOHN GOAD, and HUW H. REES. "High-temperature gas chromotography-mass spectrometry of steroid derivatives." Biochemical Society Transactions 15, no. 1 (1987): 175–79. http://dx.doi.org/10.1042/bst0150175.

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2

Matthaus, Bertrand, Mehmet Musa Özcan, and Fahad Al Juhaimi. "Some rape/canola seed oils: fatty acid composition and tocopherols." Zeitschrift für Naturforschung C 71, no. 3-4 (2016): 73–77. http://dx.doi.org/10.1515/znc-2016-0003.

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Abstract Seed samples of some rape and canola cultivars were analysed for oil content, fatty acid and tocopherol profiles. Gas liquid chromotography and high performance liquid chromotography were used for fatty acid and tocopherol analysis, respectively. The oil contents of rape and canola seeds varied between 30.6% and 48.3% of the dry weight (p<0.05). The oil contents of rapeseeds were found to be high compared with canola seed oils. The main fatty acids in the oils are oleic (56.80–64.92%), linoleic (17.11–20.92%) and palmitic (4.18–5.01%) acids. A few types of tocopherols were found in
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3

Yang, Jian Jun, Wei Sheng Guai, and Ming Yan Yang. "Biodiesel Production from a Novel Raw Material Tung Oil." Advanced Materials Research 608-609 (December 2012): 406–10. http://dx.doi.org/10.4028/www.scientific.net/amr.608-609.406.

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Tung oil from the south of Shaanxi province was assayed by chemical analysis technology, its compositions of fatty acid was discovered with gas chromotography. As experiment results, Lipase-catalyzed Tung oil producing biodiesel plays a dominant role in the process of enzymatic synthesis of biodiesel in tert-butanol reaction system.we needed controlling the continuous flow rate in the reaction system and maintained a very high FAMEs yield. Tung oil from south Shaanxi could be an ideal raw material for biodiesel production.
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4

Stone, T. B., A. C. Thompson, and H. N. Pitre. "ANALYSIS OF LIPIDS IN COTTON EXTRAFLORAL NECTAR1." Journal of Entomological Science 20, no. 4 (1985): 422–28. http://dx.doi.org/10.18474/0749-8004-20.4.422.

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Extrafloral cotton nectar subjected to gas chromatographic analysis revealed the presence of six fatty acids. Two saturated acids (palmitic and stearic) and four unsaturated acids (palmitoleic, oleic, linoleic, and linolenic), polar and neutral lipids, respectively, were identified. Thin layer chromotography separated six phospholipids including: phosphatidyl choline, phosphatidyl ethanolamine, phosphatidyl inositol, lysophosphatidyl choline, lysophosphatidyl ethanolamine, and an unknown. Fatty acid concentration was greatest in extrafloral nectar from young plants and decreased as the plants
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5

Hena, J., A. Sindama, and D. Kulawe. "Gas Chromotography Mass Spectrometric Analysis and Molluscicidal Effect of Crude Saponin from Balanites aegyptiaca (L.) Del." Journal of Advances in Biology & Biotechnology 15, no. 1 (2017): 1–7. http://dx.doi.org/10.9734/jabb/2017/28802.

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6

Goff, Ben M., Kenneth J. Moore, Steven L. Fales, and Jeffery F. Pedersen. "Comparison of gas chromotography, spectrophotometry and near infrared spectroscopy to quantify prussic acid potential in forages." Journal of the Science of Food and Agriculture 91, no. 8 (2011): 1523–26. http://dx.doi.org/10.1002/jsfa.4366.

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7

Needleman, Saul B., and Martin Porvaznik. "Identification of parent benzodiazepines by gas chromotography/mass spectroscopy (GC/MS) from urinary extracts treated with B-glucuronidase." Forensic Science International 73, no. 1 (1995): 49–60. http://dx.doi.org/10.1016/0379-0738(95)80001-8.

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8

Mouttoulatchoumy, D., and S. Alamelumangai. "Gas Chromotography-Mass Spectrometry Analysis of Ethanolic Fruit Extract of Momordica charantia var. Muricata." FoodSci: Indian Journal of Research in Food Science and Nutrition 5, no. 1 (2018): 12. http://dx.doi.org/10.15613/fijrfn/2018/v5i1/178476.

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9

Cremer, Paul S., Xingcai Su, Y. R. Shen, and Gabor Somorjai. "The hydrogenation and dehydrogenation of isobutene on Pt(111) monitored by IR–visible sum frequency generation and gas chromotography." J. Chem. Soc., Faraday Trans. 92, no. 23 (1996): 4717–22. http://dx.doi.org/10.1039/ft9969204717.

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10

Kintz, Pascal, and Patrice Mangin. "Simultaneous determination of opiates, cocaine and major metabolites of cocaine in human hair by gas chromotography/mass spectrometry (GC/MS)." Forensic Science International 73, no. 2 (1995): 93–100. http://dx.doi.org/10.1016/0379-0738(95)01725-x.

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11

Yang, Sheng Yao, and Judith Bower Carberry. "Enhancement of PCB congener biodegradation by pre-oxidation with Fenton's reagent." Water Science and Technology 30, no. 7 (1994): 105–13. http://dx.doi.org/10.2166/wst.1994.0319.

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Polychlorinated biphenyls (PCBs) were widely used in a number of industrial applications for about 60 years and became distributed extensively in the environment due to their insolubility and persistence. Biodegradability of some PCB congeners has been confirmed by previous work, indicating degradation mechanisms involving dechlorination and cometabolism. Slow microbial conversions can be enhanced by pre-oxidation with Fenton's reagent (FR) to assist microbial decomposition of PCB congeners. In this study two model PCB congeners, 4,4′-dichlorobiphenyl (DCB) and 2,2′,4,4′,6,6′-hexachlorobipheny
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12

McNevin, John P., Wendy Woodward, Abdelali Hannoufa, Kenneth A. Feldmann, and Bertrand Lemieux. "Isolation and characterization of eceriferum (cer) mutants induced by T-DNA insertions in Arabidopsis thaliana." Genome 36, no. 3 (1993): 610–18. http://dx.doi.org/10.1139/g93-082.

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Thirteen Arabidopsis thaliana mutants with deviating epicuticular wax layers (i.e., cer mutants) were isolated by screening 13 000 transformed lines produced by the seed transformation method. After crossing the 13 mutants to some of the previously known cer mutant lines, 12 of our mutants mapped to 6 of the 21 known complementation groups (cer1 through cer4 as well as cer6 and cer10), while the other mutant corresponded to a previously unknown locus, cer21. Mutant phenotypes of 6 of the 13 mutant lines were caused by T-DNA insertions within cer genes. We also analyzed the chemical composition
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13

Pacenti, M., C. Lofrumento, S. Dugheri, et al. "Physicochemical Characterization of Exhaust Particulates from Gasoline and Diesel Engines by Solid-Phase Micro Extraction Sampling and Combined Raman Microspectroscopic/Fast Gas-Chromotography Mass Spectrometry Analysis." European Journal of Inflammation 7, no. 1 (2009): 25–37. http://dx.doi.org/10.1177/1721727x0900700104.

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14

Friesen, Russell, and Sheila M. Innis. "Maternal dietary fat alters amniotic fluid and fetal intestinal membrane essential n-6 and n-3 fatty acids in the rat." American Journal of Physiology-Gastrointestinal and Liver Physiology 290, no. 3 (2006): G505—G510. http://dx.doi.org/10.1152/ajpgi.00257.2005.

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We investigated whether maternal fat intake alters amniotic fluid and fetal intestine phospholipid n-6 and n-3 fatty acids. Female rats were fed a 20% by weight diet from fat with 20% linoleic acid (LA; 18:2n-6) and 8% α-linolenic acid (ALA; 18:3n-3) (control diet, n = 8) or 72% LA and 0.2% ALA (n-3 deficient diet, n = 7) from 2 wk before and then throughout gestation. Amniotic fluid and fetal intestine phospholipid fatty acids were analyzed at day 19 gestation using HPLC and gas-liquid chromotography. Amniotic fluid had significantly lower docosahexaenoic acid (DHA; 22:6n-3) and higher docosa
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15

MARRIOT, DR PHILIP J. "Development in The Analytical Gas Chromatography of Metal Dialkydithiophospate Complexes." ASEAN Journal on Science and Technology for Development 3, no. 1 (2017): 65–82. http://dx.doi.org/10.29037/ajstd.222.

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The gas chromotographic analysis of metal-containing compounds has been a small but reasonably active field for about 25 yeras. Analyses cover such as organometalics, metal complexes, and compounds such as hydrides and halides. Reviews of the fiels may be seen in the books by Moshier and Sievers (1), Guichon and Pommier (2) and Crompton (3), as well as the papers by Uden and Henderson (4) abd Rodrigues-Vasquez (5).
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16

He, Xinxin, Xue Han, Huan Wang, Bing Wang, and Bo Wu. "Polysiloxanes-based stationary phases containing methoxy-substituted tetraphenyl–phenyl groups for gas chromotographic separations." RSC Advances 6, no. 80 (2016): 76514–23. http://dx.doi.org/10.1039/c6ra19537g.

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3,4-Di(4-methoxy phenyl)-2,5-diphenyl phenyl grafted polysiloxane (MTP) and 3,4-di(3,4,5-trimethoxy phenyl)-2,5-diphenyl phenyl grafted polysiloxane (TMP) were synthesized and statically coated on fused silica capillary columns.
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17

Karabaeva, Ra"no Botirovna, Alidzhan Aminovich Ibragimov, and Otabek Mamadaliyevich Nazarov. "COMPONENT COMPOSITION OF ESSENTIAL OIL PRUNUS PERSICA VAR. NECTARINA GROWING IN UZBEKI-STAN." chemistry of plant raw material, no. 4 (December 21, 2020): 165–70. http://dx.doi.org/10.14258/jcprm.2020046542.

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The article presents the results of determining the composition of essential oils of Prunus persica var. nectarina varieties "yellow nectarine" – "sariк luchchak (uzb.) ", growing in two regions of the Ferghana region of the Republic of Uzbekistan. The pale yellow essential oil was obtained by hydrodistillation from un-dried fresh leaves of plants. The oil composition was determined by chromatography-mass spectrometry on an Agilent 7890 AGC 6890 N gas chromotograph with a quadrupole mass spectrometer (Agilent 5975C inert MSD) as a detector on an HP-5 MS quartz capillary column. An essential oi
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18

Kreder, Susan, and Albert H. Markhart. "118 The Effect of Hydroponics on the Yield and Quality of Sweet Basil." HortScience 34, no. 3 (1999): 462A—462. http://dx.doi.org/10.21273/hortsci.34.3.462a.

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Environmental conditions are known to affect the growth and quality of culinary and medicinal herbs. Hydroponic growing conditions often produces greater yields for many leafy crops compared to growth in more-traditional media. The objective of this investigation was to compare the yield and quality of sweet basil grown in continuous flow solution culture or well-irrigated Universal Mix. Sweet basil plants were germinated under mist and then transplanted to a continous-flow hydroponics system or to 6-inch pots containing Universal Mix. Rows of pots alternated with a row of hydroponic plants in
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19

Summers, Michael L., Lina M. Botero, Scott C. Busse, and Timothy R. McDermott. "The Sinorhizobium meliloti Lon Protease Is Involved in Regulating Exopolysaccharide Synthesis and Is Required for Nodulation of Alfalfa." Journal of Bacteriology 182, no. 9 (2000): 2551–58. http://dx.doi.org/10.1128/jb.182.9.2551-2558.2000.

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ABSTRACT While screening for Sinorhizobium meliloti Pho regulatory mutants, a transposon mutant was isolated that constitutively expressed higher levels of acid and alkaline phosphatase enzymes. This mutant was also found to form pseudonodules on alfalfa that were delayed in appearance relative to those formed by the wild-type strain, it contained few bacteroids, and it did not fix nitrogen. Sequence analysis of the transposon insertion site revealed the affected gene to have high homology to Lon proteases from a number of organisms. In minimal succinate medium, the mutant strain was found to
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20

Soufleros, Evangelos H., and Alain Bertrand. "Les acides gras libres du vin; observations sur leur origine." OENO One 22, no. 4 (1988): 251. http://dx.doi.org/10.20870/oeno-one.1988.22.4.1267.

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<p style="text-align: justify;">L'addition d'écorces de levure ou de lies fraîches dans un milieu alcoolique entraîne une augmentation de la teneur en acides gras libres suivie d'une diminution progressive; les lies fraîches ne cèdent pratiquement pas d'acide palmitoléique, inhibiteur de l'activité malolactique.</p><p style="text-align: justify;">La teneur en acides gras libres augmente au cours de la macération des raisins rouges, mais elle est peu affectée par la macération préfermentaire des raisins blancs.</p><p style="text-align: justify;">Par ailleurs, les t
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21

"Quantitative gas chromotography for laboratory analyses and on-line process control." Journal of Chromatography A 455 (January 1988): 445. http://dx.doi.org/10.1016/s0021-9673(01)82156-7.

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22

R. Alkhafaf, Dina M., and Eman M. Jarallah. "Gas Chromatography-Mass Spectrometry (GC-MS) Analysis of Antibiotic producing Actinomycetes Soils samples." International Journal of Research in Pharmaceutical Sciences 9, SPL1 (2018). http://dx.doi.org/10.26452/ijrps.v9ispl1.1317.

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In this study,a total of 120 agriculture soils samples,theirty two Actinomycetes isolates were isolated from ten different locations in Babylon city which were purified several times on International Streptomyces project-2 agar medium (ISP-2). All these isolates were tested for antibacterial activity by primary and secondary screening test against gram positive pathogenic bacteria (Staphylococcus albus,Staphylococcus aureus,and Streptococcus pyogenes) and gram negative pathogenic bacteria (Klebsillae pnemoniae,Escherichia coli,Pseudomonas aerouginosa,Seratia marcescens and Aeromonas hydrophila
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23

Tobin, Rachel. "Detection of Pesticide Residues in Organic and Conventional Fruits and Vegetables Available in Ireland Using Gas Chromotography/Tandem Mass Spectrometry (GC-MS/MS) and Liquid Chromotography/Tandem Mass Spectrometry (LC-MS/MS) Detection." Journal of Nutritional Health & Food Science 2, no. 1 (2014). http://dx.doi.org/10.15226/jnhfs.2014.00113.

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24

"Microminiature gas chromotograph." Photovoltaics Bulletin 2002, no. 6 (2002): 14. http://dx.doi.org/10.1016/s1473-8325(02)80223-1.

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25

Sami, Amel, Catherine Stanton, Paul Ross, Tony Ryan, and Imad Elimairi. "Ultra- structure of Toombak; smokeless tobacco of Sudan and its effects on oral and systemic health." Access Microbiology 2, no. 7A (2020). http://dx.doi.org/10.1099/acmi.ac2020.po0722.

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Introduction: Toombak is a smokeless tobacco used by the Sudanese. Nicotiana Rustica leaves are fermented, and sodium bicarbonate is added, increasing Ph. This causes high absorption spikes of unprotonated nicotine through mucosal epithelium, and into the blood, distinguishing Toombak as an addictive product. Furthermore,Toombak hashighmicrobial contamination due to its open field, rural production. Materials and methods: 21 tobacco samples were collected from 3 main towns in the capital Khartoum, Sudan. Analysis included microbiome (16S rRNA sequencing), metabolome (Liquid and Gas Chromotogra
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26

"Experience Real Innovation For The Gas Chromotographer." Chemical & Engineering News Archive 90, no. 6 (2012): 11. http://dx.doi.org/10.1021/cen-09006-ad02.

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