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| 1 | Gas chromatography-mass spectrometry analysis of different organic crude extracts from the local medicinal plant of Thymus vulgaris L显示文摘Objective:To isolate and analyze the chemical composition in different crude extracts of from the leaves of locally grown of Thymus vulgaris L(T.vulgaris)by gas chromatography-mass spectrometry(GC-MS).Methods:The shade dried leaves powder was extracted with methanol by using Soxhlet extractor.Methanol crude extracts of T.vulgaris and the derived fractions of hexane,chloroform,ethyl acetate and butanol were obtained.Results:Qualitative analyses of various organic crude extracts of T.vulgaris by using GC-MS showed that there were different types of high and low molecular weight compounds.Most of the isolated and identified compounds by GC-MS in the crude extracts are basically biologically important.Further,the T.vulgaris leaf possessed certain characteristics that can be ascribed to cultivation on a domestic plantation.The crude extracts were prepared from the powder leaves of T.vulgaris for respective compounds can be chosen on the basis of above GC-MS analysis.Conclusions:All the major compounds were identified and characterized by spectroscopic method in different organic crude extracts of T.vulgaris are biologically active molecules.Thus the identification of a good number of compounds in various crude extracts of T.vulgaris might have some ecological role. | Laila Salim Al Hashmi Mohammad Amzad Hossain Afaf Mohammed Weli Qasim Al-Riyami Jamal Nasser Al-Sabahi | 2013 | Asian Pacific Journal of Tropical Biomedicine2013，3，1： | 4 |
| 2 | 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显示文摘Objective:To 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).Methods:The 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.Results:About 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 asα-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%and3.65%),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 p-pinene,α-terpinolene,linalool,4-terpineol,α-terpineol,o-methylthymol,L-alloaromadendrene and viridiflorene.Conclusions:The chemical consliluents 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. | Rahma Said Salim Al Nomaani Mohammad Amzad Hossain Afaf Mohammed Weli Qasim Al-Riyami Jamal Nasser Al-Sabahi | 2013 | Asian Pacific Journal of Tropical Biomedicine2013，3，5： | 3 |
| 3 | Study of total phenol,flavonoids contents and phytochemical screening of various leaves crude extracts of locally grown Thymus vulgaris显示文摘Objective:To prepare various crude extracts using different polarities of solvent and to quantitatively evaluate their total phenol,flavonoids contents and phytochemical screening of Thymus vulgaris collected from Al Jabal Al Akhdar,Nizwa.Sultanate of Oman.Methods:The leave sample was extracted with methanol and evaporated.Then it was defatted with water and extracted with different polarities organic solvents with increasing polarities.The prepare hexane,chloroform,ethyl acetate,hutanol and methanol crude extracts were used for their evaluation of total phenol,flavonoids contents and phytochemical screening study.The established conventional metliods were used for quantitative determination of total phenol,flavonoids contents and phytochemical screening.Results:Phytochemical screening for various crude extracts were tested and shown positive result for flavonoids,saponins and steroids compounds.The result for total phenol content was the highest in hutanol and the lowest in methanol crude extract whereas the total flavonoids contents was the highest in methanol and the lowest hexane crude extract.Conclusions:The crude extracts from locally grown Thymus vulgaris showed high concentration of flavonoids and it could be used as antibiotics for different curable and uncurable diseases. | Mohammad Amzad Hossain Khulood Ahmed Salim AL-Raqmi Zawan Hamood AL-Mijizy Afaf Mohammed Weli Qasim Al-Riyami | 2013 | Asian Pacific Journal of Tropical Biomedicine2013，3，9： | 2 |
| 4 | Effectiveness of human menopausal gonadotropin versus recombinant follicle-stimulating hormone for controlled ovarian hyperstimulatioo in assisted reproductive cycles: a meta-analysis显示文摘 | VAN WELY M WESTERGAARD LG BOSSUYT PM | 2003 | FertilSteril2003，80，： | 1 |
| 5 | GnRHa to trigger final oocyte maturation:a time to reconsider显示文摘 | Youssef M van der Veen F van Wely M | 2010 | Hum Reprod2010，25，2： | 1 |
| 6 | Treatment of thy- roid disorders before conception and in early pregnancy:a systematic re- view显示文摘 | Vissenberg R van den Boogaard E van Wely M | 2012 | Hum Reprod Update2012，18，4： | 1 |
| 7 | Influence of texture on porosity and permeability of unconsolidated sand 显示文摘 | Beard D C Wely P K | 1973 | AAPG Bulletin1973，57，2： | 1 |
| 8 | Influence of texture on porosity and permeability of unconsolidated sand显示文摘 | Beard D C Wely P K | 1973 | AAPG Bulletin1973，57，2： | 1 |
| 9 | Low oxygen concentrations for embryo culture in assisted reproductive technologies显示文摘 | Bontekoe S Mantikou E Van Wely M | | 0，，： | 1 |
| 10 | Is twin pregnancy nec- essarily an adverse outcome of assisted reproductive technologies? 显示文摘 | Van Wely M Twisk M Mol BW | 2006 | Hum Reprod2006，21，11： | 1 |
| 11 | The MN1 oncoprotein synergizes with coactivators RAC3 and p300 in RAR-RXR- mediated transcription显示文摘 | van Wely KH Molijn AC Buijs A | 2003 | Oncogene2003，22，5： | 1 |
| 12 | Timing luteal phase support in GnRH agonist down-regulated IVF/embryo transfer cycles显示文摘 | Mochtar M H Van Wely M Van der Veen F | 2006 | Hum Reprod2006，21，4： | 1 |
| 13 | Can dopamine agonists reduce the incidence and severity of OHSS in IVF/ICSI treatment cycles? A systematic review and meta- analysis显示文摘 | Youssef MAFM van Wely M Hassan MA | 2010 | Hum Reprod Update2010，16，5： | 1 |
| 14 | Mercapturic acids,protein adducts,and DNA adducts as biomarkers of electrophilic chemicals显示文摘 | Van Welie R T van Dijck R G Vermeulen N P | 1992 | Crit Rev Toxicol1992，22，56： | 1 |
| 15 | The role of metformin in polycystic ovary syndrome:a systematic review显示文摘 | Moll E van der Veen F van Wely M | | 0，，06： | 1 |
| 16 | Low oxygen concentrations for embryo culture in assisted reproductive technologies显示文摘 | Mantikou E Bontekoe S van Wely M | 2013 | Hum Reprod Update2013，19，3： | 1 |
| 17 | Earlier mother's age at menarche predicts rapid infancy growth and childhood obesity显示文摘 | Northstone K WelIs JC | 2007 | PLoS Med2007，，4： | 1 |
| 18 | Recombinant versus urinary gonadotrophin for ovarian stimulation in assisted reproductive technology cycles 显示文摘 | van Wely M Kwan I Burt AL et a! | 2011 | Cochrane Database Syst Rev2011，16，00： | 1 |
| 19 | Current status of nitrous oxide as a behaviormanagement practice routine in pediatric dentistry显示文摘 | Levering NJ Welie JV | 2011 | J Dent Child2011，78，1： | 1 |
| 20 | Translocation of proteins across the cell envelope of Gram-positive bacteria 显示文摘 | van Wely K H Swaying J Freudl R | 2001 | FEMS Microbiol Rev2001，25，4： | 1 |
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