scholarly journals Chemical profile of Taxodium distichum winter cones

2017 ◽  
pp. 77-83
Author(s):  
Nina Djapic ◽  
Mihailo Ristic
Keyword(s):  
Mass Spectrometry ◽  
Gas Chromatography ◽  
Retinoic Acid ◽  
Taxodium Distichum ◽  
Gas Chromatography Mass Spectrometry ◽  
Bornyl Acetate ◽  
Caryophyllene Oxide ◽  
Ionization Detector ◽  
Chemical Profile ◽  
Flame Ionization

This work is concerned with the chemical profile of Taxodium distichum winter cones. The extract obtained after maceration in absolute ethanol was subjected to qualitative analysis by gas chromatography/mass spectrometry and quantification was done by gas chromatography/ flame ionization detector. The chromatogram revealed the presence of 53 compounds, of which 33 compounds were identified. The extract contained oxygenated monoterpenes (12.42%), sesquiterpenes (5.18%), oxygenated sesquiterpenes (17.41%), diterpenes (1.15%), and oxygenated diterpenes (30.87%), while the amount of retinoic acid was 0.32%. Monoacylglycerols were detected in the amount of 4.32%. The most abundant compounds were: caryophyllene oxide (14.27%), 6,7-dehydro-ferruginol (12.49%), bornyl acetate (10.96%), 6- deoxy-taxodione (9.50%) and trans-caryophyllene (4.20%).

scholarly journals Volatile Metabolites in Liverworts of Ecuador

Metabolites ◽  
2020 ◽  
Vol 10 (3) ◽  
pp. 92 ◽  
Author(s):  
Eduardo Valarezo ◽  
Oswaldo Tandazo ◽  
Kathia Galán ◽  
Jandry Rosales ◽  
Ángel Benítez
Keyword(s):  
Mass Spectrometry ◽  
Gas Chromatography ◽  
Chemical Composition ◽  
Volatile Compounds ◽  
Gas Chromatography Mass Spectrometry ◽  
Caryophyllene Oxide ◽  
Ionization Detector ◽  
Volatile Metabolites ◽  
Flame Ionization ◽  
Germacrene D

Volatile metabolites from Frullania brasiliensis Raddi, Herbertus juniperoideus (Sw.) Grolle, Leptoscyphus hexagonus (Nees) Grolle, and Syzygiella anomala (Lindenb. & Gottsche) Steph collected in the south of Ecuador were investigated. Volatile secondary metabolites were extracted by hydrodistillation and analyzed by gas chromatography/flame ionization detector (GC/FID) and Gas chromatography/Mass spectrometry (GC/MS). Sixty-seven volatile compounds were identified in the four species, which represent between 80.12–90.17% of the total chemical composition. The major components were τ-muurolol (32.14%) and Germacrene-D (11.98%) in the essential oil of F. brasiliensis, bicyclogermacrene (18.23%), and Caryophyllene oxide (15.29%) in the oil of H. juniperoideus, Cabreuva oxide D (33.77%) and Elemol (18.55%) in the oil of Leptoscyphus hexagonus, and Silphiperfola-5,7(14)-diene (25.22%) and Caryophyllene oxide (8.98%) in the oil of Syzygiella anomala. This is the first report on volatile compounds for the species Herbertus juniperoideus, Leptoscyphus hexagonus, and Syzygiella anomala.

Chemical Composition of the Essential Oil From Minthostachys acris Schmidt-Leb. Grown in the Peruvian Andes

2019 ◽  
Vol 14 (7) ◽  
pp. 1934578X1985749
Author(s):  
Jorge A. Pino ◽  
María Milagros Dueñas-Mendoza ◽  
Leoncio Solís-Quispe
Keyword(s):  
Mass Spectrometry ◽  
Gas Chromatography ◽  
Chemical Composition ◽  
Essential Oil ◽  
Steam Distillation ◽  
Gas Chromatography Mass Spectrometry ◽  
Ionization Detector ◽  
Peruvian Andes ◽  
Flame Ionization ◽  
Aerial Parts

The chemical composition of the essential oil from aerial parts of Minthostachys acris Schmidt-Leb. grown in Cuzco was studied. A total of 59 volatile compounds were identified by gas-chromatography-flame ionization detector and gas chromatography-mass spectrometry in the essential oil obtained by steam distillation, of which the most prominent were pulegone (54.4%), cis-menthone (11.0%), and thymol (6.3%).

Characterization of Agarwood Incense using Gas Chromatography - Mass Spectrometry (GC-MS) coupled with Solid Phase Micro Extraction (SPME) and Gas Chromatography - Flame Ionization Detector (GC-FID)

2015 ◽  
Vol 12 (2) ◽  
pp. 67
Author(s):  
Nurlaila Ismail ◽  
Mastura Lbrahim ◽  
Seema Zareen ◽  
Mohd Hezri Fazalul Rahiman ◽  
Saiful Nizam Tajuddin ◽  
...  
Keyword(s):  
Mass Spectrometry ◽  
Gas Chromatography ◽  
Solid Phase ◽  
Flame Ionization Detector ◽  
Gas Chromatography Mass Spectrometry ◽  
Solid Phase Micro Extraction ◽  
Ionization Detector ◽  
Polydimethyl Siloxane ◽  
Flame Ionization ◽  
Chromatography Mass Spectrometry

This paper presents the application of Solid Phase Micro Extraction (SPME) coupled with Gas Chromatography-Mass Spectrometry (GC-MS) and Gas Chromatography-Flame Ionization Detector (GC-FID) to charaterize agarwood incense. The work involved three types of SPME fibres at 30 minutes sampling time. The fibres are 50/30 µm divinylbenzene-carboxen­polydimethysiloxane (DVB-CAR-PDMS), 65 µm polydi methylsiloxane­divinylbenzene (PDMS-DVB) and 85 µm carboxen-polydimethyl siloxane (CAR-PDMS). The results showed that among many compounds extracted by GC-MS coupled with SPME, six compounds were found significantly presence in high quality aganvood incense due to their high percentage area (%). They are beta-maaliene, alpha-elemol, beta-selinene, 10-epi-gamma-eudesmol, agarospirol and caryophellene oxide. The finding offers a new approach for establishing the volatile profile of agarwood incense components which is beneficial for agarwood grading and discrimination.

Frontline ® immunochromatographic device for on-site urine testing of amphetamines: laboratory validation using authentic specimens

2000 ◽  
Vol 37 (2) ◽  
pp. 199-204 ◽  
Author(s):  
O Beck ◽  
M Kraft ◽  
M R Moeller ◽  
B L Smith ◽  
S Schneider ◽  
...  
Keyword(s):  
Mass Spectrometry ◽  
Gas Chromatography ◽  
Close Agreement ◽  
Flame Ionization Detector ◽  
Gas Chromatography Mass Spectrometry ◽  
Ionization Detector ◽  
Test Device ◽  
Flame Ionization ◽  
Colour Scale ◽  
Urine Testing

We evaluated a new test device for amphetamines and methamphetamines (Frontline ®, cut-off limit 300 ng/mL) using authentic clinical and forensic specimens. The device is based on immunochromatography and is dipped into urine and read visually by comparison with a colour scale after a few minutes. A total of 658 specimens were tested by comparing results of the screening procedure with established immunoassays. Discordant results were further investigated by gas chromatography- mass spectrometry or gas chromatography (with flame ionization detector). The Frontline device had a sensitivity of 93% and a specificity of 98%. When specimens were classified by urine amphetamine concentration, close agreement was obtained at concentrations below 150 ng/mL and above 1000 ng/mL. A small number of specimens with amphetamine concentrations between 300 and 1000 ng/mL tested negative in the Frontline test. This finding could to some extent be explained by the enantioselectivity of the antibodies in the Frontline test to d-amphetamine. We conclude that the performance of the Frontline test device for amphetamines is adequate for presumptive clinical and forensic screening.

Citramalic acid in cerebrospinal fluid of patients with bacterial meningitis.

1984 ◽  
Vol 30 (7) ◽  
pp. 1209-1212 ◽  
Author(s):  
S Perlman ◽  
S A Carr
Keyword(s):  
Mass Spectrometry ◽  
Gas Chromatography ◽  
Cerebrospinal Fluid ◽  
Bacterial Meningitis ◽  
Viral Meningitis ◽  
Gas Chromatography Mass Spectrometry ◽  
Gas Liquid Chromatography ◽  
Hydroxy Acids ◽  
Ionization Detector ◽  
Flame Ionization

Abstract Cerebrospinal fluid (CSF) from uninfected patients and from patients with bacterial and viral meningitis was analyzed by gas-liquid chromatography, with use of a flame ionization detector, and by gas chromatography-mass spectrometry. The resulting profiles were consistent and reproducible. Hydroxy acids were the compounds found in greatest abundance in both normal and infected CSF. Control experiments to establish the sensitivity and efficiency of the extraction and derivatization methods are also presented. Constituents of CSF from patients with bacterial meningitis differed quantitatively and qualitatively from those of CSF from uninfected patients or patients with nonbacterial infections. CSF from seven of eight patients with bacterial meningitis contained citramalic acid, a compound not previously identified in either normal or infected CSF. The implications of these findings are discussed.

Characterization of Agarwood Incense using Gas Chromatography - Mass Spectrometry (GC-MS) coupled with Solid Phase Micro Extraction (SPME) and Gas Chromatography - Flame Ionization Detector (GC-FID)

2015 ◽  
Vol 12 (2) ◽  
pp. 67
Author(s):  
Nurlaila Ismail ◽  
Mastura Lbrahim ◽  
Seema Zareen ◽  
Mohd Hezri Fazalul Rahiman ◽  
Saiful Nizam Tajuddin ◽  
...  
Keyword(s):  
Mass Spectrometry ◽  
Gas Chromatography ◽  
Solid Phase ◽  
Flame Ionization Detector ◽  
Gas Chromatography Mass Spectrometry ◽  
Solid Phase Micro Extraction ◽  
Ionization Detector ◽  
Polydimethyl Siloxane ◽  
Flame Ionization ◽  
Chromatography Mass Spectrometry

This paper presents the application of Solid Phase Micro Extraction (SPME) coupled with Gas Chromatography-Mass Spectrometry (GC-MS) and Gas Chromatography-Flame Ionization Detector (GC-FID) to charaterize agarwood incense. The work involved three types of SPME fibres at 30 minutes sampling time. The fibres are 50/30 µm divinylbenzene-carboxen­polydimethysiloxane (DVB-CAR-PDMS), 65 µm polydimethylsiloxane­divinylbenzene (PDMS-DVB) and 85 µm carboxen-polydimethyl siloxane (CAR-PD MS). The results showed that among many compounds extracted by GC-MS coupled with SPME, six compounds were found significantly presence in high quality aganvood incense due to their high percentage area(%). They are b-maaliene, a-elemol, b-selinene, 10-epi-y-eudesmol, agarospirol and caryophellene oxide. The finding offers a new approach for establishing the volatile profile of agarwood incense components which is beneficial for agarwood grading and discrimination. 

Comparative Chemical Profile of Lavandula stoechas L. Essential Oils Isolated from Flowers and Leaves Native to Algeria

2019 ◽  
Vol 17 (5) ◽  
pp. 240-248
Author(s):  
B. Barhouchi ◽  
S. Aouadi ◽  
A. Abdi
Keyword(s):  
Mass Spectrometry ◽  
Gas Chromatography ◽  
Essential Oils ◽  
Qualitative Data ◽  
Gas Chromatography Mass Spectrometry ◽  
Bornyl Acetate ◽  
Chemical Profile ◽  
Lavandula Stoechas ◽  
Soil Climate ◽  
Northeastern Algeria

This study is aimed at the extraction and chemical analysis of the essential oils of the leaves and flowers of Lavandula stoechas L growing in northeastern Algeria. The hydrodistilled oils isolated from leaves (0.75%) and flowers (0.6%) were characterized by fifty-two and sixtyfour compounds, respectively. Gas chromatography–mass spectrometry (GC-MS) analysis demonstrated that both organs revealed the presence of fenchone and camphor as the major compounds. However, the highest percentage of fenchone (52.7%) was observed in the flowers oil; whereas, the percentage of camphor (25.94%) was significantly higher in the leaves oil in comparison with its content in flowers oil (15.52%). Other predominant compounds in leaves and flowers oils were, respectively, as follows: 1.8-cineole (4.84% and 4.02%), camphene (4.55% and 3.23%), bornyl acetate (3.06% and 4.43%), α-terpinolene (1.09% and 1.45%), viridiflorol (1.51% and 1.39%), and α- pinene (0.5% and 1.5%). The quantitative and qualitative data proved that the chemical profile of both organs of Lavandula stoechas native to Algeria was approximately close. The oil chemical composition is susceptible to the influence of environmental factors (soil, climate). The biological activity (antimicrobial and antioxidant) of the two oils from Lavandula stoechas L., native to this Algerian region is under study.

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