Rapid drug screening using toxi-lab® extraction followed by capillary gas chromatography/mass spectroscopy

1987 ◽  
Vol 20 (5) ◽  
pp. 303-306 ◽  
Author(s):  
David T. Chia ◽  
Jeffrey A. Gere
Keyword(s):  
Gas Chromatography ◽  
Mass Spectroscopy ◽  
Drug Screening ◽  
Capillary Gas Chromatography ◽  
Gas Chromatography Mass Spectroscopy

scholarly journals Chemical Compositions and Tyrosinase Activity of the Essential Oils of Alpinia aquatica

2018 ◽  
Vol 13 (6) ◽  
pp. 1934578X1801300 ◽  
Author(s):  
Nissha Bharrathi Romes ◽  
Norazah Basar ◽  
Hasnah M. Sirat ◽  
Siti Ernieyanti Hashim ◽  
Zaini Asim
Keyword(s):  
Gas Chromatography ◽  
Essential Oils ◽  
Mass Spectroscopy ◽  
Capillary Gas Chromatography ◽  
Chemical Compositions ◽  
Inhibition Activity ◽  
Tyrosinase Inhibition ◽  
Germacrene D ◽  
Leaf Oil ◽  
Gas Chromatography Mass Spectroscopy

The essential oils obtained from the fresh rhizome, leaf, and pseudostem of Alpinia aquatica Roscoe. were hydrodistillated and analyzed using capillary gas chromatography (GC) and gas chromatography-mass spectroscopy (GC-MS). β-Pinene (11.7%), α-humulene (8.9%), aromadendrene (8.7%), and sabinene (7.7%) were the major components in the rhizome oil. The most abundant components of the leaf oil were germacrene D (21.3%), β-pinene (15.6%) and sabinene (12.1%), while α-humulene (19.8%), germacrene D (15.2%) and β-caryophyllene (8.7%) were the main constituents in the pseudostem oil. Antityrosinase assay revealed that all the three essential oils exhibited weak tyrosinase inhibition activities. The rhizome oil showed the highest inhibition activity with the value of 9.5% for the L-DOPA oxidation.

scholarly journals Constituents of Peel and Leaf Essential Oils of Citrus Medica L

2009 ◽  
Vol 1 (2) ◽  
pp. 387-392 ◽  
Author(s):  
M. N. I. Bhuiyan ◽  
J. Begum ◽  
P. K. Sardar ◽  
M. S. Rahman
Keyword(s):  
Gas Chromatography ◽  
Essential Oil ◽  
Essential Oils ◽  
Mass Spectroscopy ◽  
Chemical Constituents ◽  
Citrus Medica ◽  
Leaf Oil ◽  
Gas Chromatography Mass Spectroscopy ◽  
Total Oil ◽  
Peel Oil

The chemical constituents of leaf and peel essential oil of Citrus medica L. were analysed by gas chromatography mass spectroscopy (GC-MS). Nineteen components accounting for 99.9% of the oil were identified in leaf oil. The major constituents are erucylamide (28.43%), limonene (18.36%) and citral (12.95%). The peel oil contains forty three components accounting for 99.8% of the total oil and the major components are isolimonene (39.37%), citral (23.12%) and limonene (21.78%). Keywords: Citrus medica; Essential oils; GC-MS; Erucylamide; Isolimonene. © 2009 JSR Publications. ISSN: 2070-0237 (Print); 2070-0245 (Online). All rights reserved.DOI: 10.3329/jsr.v1i2.1760   

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