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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 | Biodiesel production from waste tallow显示文摘 | HAQ NAWAZ BHATTI MUHAMMAD ASIF HANIF MOHAMMAD QASIM | 2008 | Fuel2008，87，13： | 1 |
| 5 | Biodiesel production from waste tallow显示文摘 | Haq Nawaz Bhatti Muhammad Asif Hanif Mohammad Qasim | 2008 | Fuel2008，87，1314： | 1 |
| 6 | Prevalence and severity of temporomandibular disorders among university students in Riyadh显示文摘 | Syed Rashid Habib Mohammad Qasim A1 Rifaiy | 2015 | The Saudi Dental Journal2015，27，： | 1 |
| 7 | Petrogenesis of the Late Cretaceous Tholeiitic Volcanism and Oceanic Island Arc Affinity of the Chagai Arc, Western Pakistan显示文摘The Late Cretaceous Chagai arc outcrops in western Pakistan,southern Afghanistan and eastern Iran.It is in the Tethyan convergence zone,formed by northward subduction of the Arabian oceanic plate beneath the Afghan block.The oldest unit of the Chagai arc is the Late Cretaceous Sinjrani Volcanic Group.This is composed of porphyritic lava flows and volcaniclastic rocks,and subordinate shale,sandstone,limestone and chert.The flows are fractionated low-K tholeiitic basalts,basalticandesites,and andesites.Relative enrichment in their LILE and depletion in HFSE,and negative Nb and Ta and positive K,Ba and Sr anomalies point to a subduction-related origin.Compared to MORB,the least fractionated Chagai basalts have low Na_2O,Fe_2O_3~T,CaO,Ti,Zr,Y and ^(87)Sr/^(86)Sr.Rather than an Andean setting,these results suggest derivation from a highly depleted mantle in an intraoceanic arc formed by Late Cretaceous convergence in the Ceno-Tethys.The segmented subduction zone formed between Gondwana and a collage of small continental blocks(Iran,Afghan,Karakoram,Lhasa and Burma) was accompanied by a chain of oceanic island arcs and suprasubduction ophiolites including Semail,Zagros,Chagai-Raskoh,Kandahar,Muslim Bagh,Waziristan and Kohistan-Ladakh,Nidar,Nagaland and Manipur.These complexes accreted to the southern margin of Eurasia in the Late Cretaceous. | Rehanul Haq SIDDIQUI M. Qasim JAN Mohammad Asif KHAN M. Ishaq KAKAR John D. FODEN | 2017 | Acta Geologica Sinica(English Edition)2017，91，4： | 0 |
| 8 | Impact of climate change on tropical health in the Central African Republic显示文摘Climate change is the variation in climate that human activities contribute to,directly or indirectly.Furthermore,climate change impacts human activity,but it also affects human existence and sustenance[1].Climate change has shown a negative impact on the quality of life,morbidity,and mortality of people across the globe[1,2].In Central African Republic(CAR),the number of reported weather-related natural disasters has more than tripled since the 1960s[2].Since then,these disasters have resulted in over 600000 deaths[2]. | Aborode Tunde Abdullahi Corriero Anna Chiara Mehmood Qasim Chahal Priyanka Mohammad MehediHasan Upadhyay Prashant Nolkha Yash Kumar Sahi Usman Javed Ahmed Fatima Abdirazak | 2022 | Asian Pacific Journal of Tropical Medicine2022，15，6： | 0 |
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