1.Introduces a novel scavenger for waste anesthetic gas.
Yan-dong HU ; Jin-bing LIANG ; Jin-hua SONG
Chinese Journal of Medical Instrumentation 2009;33(1):67-68
This article introduces a novel scavenger for waste anesthetic gas which makes use of negative pressure in operating room. This setting can scavenge the exhaust gas absolutely without affection the normal work of anaesthesia.
Anesthetics
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Gas Scavengers
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Operating Rooms
2.Observation on scavenging free radical function of Artemisia burning products.
Mei YANG ; Dan JIANG ; Yun YI ; Zong-Guo HONG
Chinese Acupuncture & Moxibustion 2009;29(7):547-549
OBJECTIVETo study the pharmacologic action of Artemisia burning products.
METHODSThe extractions of Artemisia burning products were determined by spectrophotometry. The scavenging ability of Artemisia burning products on DPPH was evaluated. The chemical components and structures of Artemisia burning products were analyzed by Gas Chromatography and Mass Spectrometry (GC-MS).
RESULTSThe scavenging ability of extractions from Artemisia burning products was the strongest. Thirty-six chemical components were detected, and the 5-tert-Butylpyrogallol among them had a stronger anti-oxygen capacity, its scavenging free radical ability was 1.55 times and 1.21 times as strong as VitC and BHT, respectively.
CONCLUSIONThe scavenging free radical ability of 5-tert-Butylpyrogallol extracted from Artemisia burning products is stronger than the natural antioxidant of VitC and artificial synthetic of BHT.
Artemisia ; chemistry ; Free Radical Scavengers ; chemistry ; Gas Chromatography-Mass Spectrometry ; Spectrophotometry
3.Chemical composition of essential oils and in vitro antioxidant activity of fresh and dry leaves crude extracts of medicinal plant of Lactuca Sativa L. native to Sultanate of Oman.
Rahma Said Salim Al NOMAANI ; Mohammad Amzad HOSSAIN ; Afaf Mohammed WELI ; Qasim AL-RIYAMI ; Jamal Nasser AL-SABAHI
Asian Pacific Journal of Tropical Biomedicine 2013;3(5):353-357
OBJECTIVETo isolate and analyse the chemical composition in the essential oils and free radical scavenging activity of different crude extracts from the fresh and dry leaves of vegetable plants of Lactuca sativa L. (L. sativa).
METHODSThe essential oils and volatile chemical constituents were isolated from the fresh and dry leaves of L. sativa (lettuce) grown in Sultanate of Oman by hydro distillation method. The antioxidant activity of the crude extracts was carried out by well established free radical scavenging activity (DPPH) method.
RESULTSAbout 20 chemical compounds of different concentration representing 83.07% and 79.88% respectively were isolated and identified by gas chromatography-mass spectroscopy in the essential oils isolated from the fresh and dry leaves as α-pinene (5.11% and 4.05%), γ-cymene (2.07% and 1.92%), thymol (11.55% and 10.73%), durenol (52.00% and 49.79%), α-terpinene (1.66% and 1.34%), thymol acetate (0.99% and 0.67%), caryophyllene (2.11% and 1.98%), spathulenol (3.09% and 2.98%), camphene (4.11% and 3.65%), limonene (1.28% and 1.11%) representing these major chemical compounds. However, some other minor chemical constituents were also isolated and identified from the essential oil of lettuce including β-pinene, α-terpinolene, linalool, 4-terpineol, α-terpineol, o-methylthymol, L-alloaromadendrene and viridiflorene.
CONCLUSIONSThe chemical constituents in the essential oils from the locally grown lettuce were identified in the following classes or groups of chemical compounds such as monoterpenes, sesquiterpenes volatile organic compounds and their oxygenated hydrocarbons. Therefore, the essential oils and the crude extracts from Omani vegetable species of lettuce are active candidates which would be used as antioxidant, antifungal or antimicrobial agents in new drugs preparation for therapy of infectious diseases.
Antioxidants ; chemistry ; pharmacology ; Free Radical Scavengers ; chemistry ; pharmacology ; Gas Chromatography-Mass Spectrometry ; Humans ; Lettuce ; chemistry ; Oils, Volatile ; chemistry ; pharmacology ; Plant Extracts ; chemistry ; pharmacology ; Plant Leaves ; chemistry
4.Chemical components of essential oils from Meconopsis oliverana and their antioxidant activity.
Ang GAO ; Bing ZHAO ; Jiang GONG ; Shi-Feng NI ; Chao CUI ; Mo YAO
China Journal of Chinese Materia Medica 2013;38(2):284-288
OBJECTIVETo study the chemical components of essential oils from Meconopsis oliverana and their antioxidant activity.
METHODThe essential oil was extracted by steam distillation, and GC-MS analysis was used to identify its constituents. The OH free radical scavenging activity of the essential oils was evaluated with an enzyme mark instrument by assay of the ability of DPPH free radical scavenging. BHT was used as positive control.
RESULTForty-seven compounds, account for 91.866% of the essential oils, were identified. The ability of scavenging OH and DPPH radicals of the essential oils is stronger than that of BHT.
CONCLUSIONThe main chemical constituents of the essential oils from M. oliverana are n-hexadecanoic acid (27.653%) and 6,10,14-trimethyl-2-pentadecanone (16.330%). And the essential oils showed strong antioxidant activity.
Antioxidants ; chemistry ; metabolism ; Biphenyl Compounds ; metabolism ; Butylated Hydroxytoluene ; metabolism ; China ; Fatty Alcohols ; chemistry ; isolation & purification ; Free Radical Scavengers ; chemistry ; metabolism ; Gas Chromatography-Mass Spectrometry ; Hydroxyl Radical ; metabolism ; Oils, Volatile ; chemistry ; isolation & purification ; Oxidation-Reduction ; Palmitic Acid ; chemistry ; isolation & purification ; Papaveraceae ; chemistry ; Picrates ; metabolism ; Plant Oils ; chemistry ; isolation & purification