نتایج جستجو برای: acidic hexane

تعداد نتایج: 40901  

2013
S. Revathi N. S. Malathy

The hexane extract of Curcuma aromatica, a plant belonging to the family Zingiberaceae was tested on 10 bacterial strains (clinical isolates and standard strains). Agar diffusion method was adopted for determining the antibacterial activity of the extract. The hexane extract was found to be active against all Gram-positive strains tested, but inactive against Gram-negative strains. The minimum ...

Journal: :The Southeast Asian journal of tropical medicine and public health 2006
Junya Intaranongpai Warinthorn Chavasiri Wandee Gritsanapan

The present study focused on the separation and identification of the active compounds against head lice from the hexane extract of Annona squamosa L seed. Chromatographic and spectroscopic techniques revealed that two major compounds of the hexane seed extract were oleic acid and triglyceride with one oleate ester. The yields of these compounds were 13.25% and 7.74% dry weight, respectively. T...

2012
Thiba Krishnan Wai-Fong Yin Kok-Gan Chan

Quorum sensing controls the virulence determinants in most proteobacteria. In this work, the hexane, chloroform and methanol extracts of an Ayurveda spice, namely clove (Syzygium aromaticum), shown anti-quorum sensing activity. Hexane and methanol extracts of clove inhibited the response of C. violaceum CV026 to exogenously supplied N-hexanoylhomoserine lactone, in turn preventing violacein pro...

2016
Nagalakshmi Haleyur Esmaeil Shahsavari Abdulatif A. Mansur Eman Koshlaf Paul D. Morrison A. Mark Osborn Andrew S. Ball

Polycyclic aromatic hydrocarbons (PAHs) are a major class of organic hydrocarbons with high molecular weight that originate from both natural and anthropogenic sources. Sixteen PAHs are included in the U.S Environmental Protection agency list of priority pollutants due to their mutagenic, carcinogenic, toxic and teratogenic properties. In this study, the development and optimization of a simpli...

2017
Mahnaz Khanavi Behnaz Najafi Seyede Nargess Sadati Mohammad Reza Abai Hassan Vatandoost

BACKGRAND The genus Ajuga, belongs to Lamiaceae family, is one of the exclusive subspecies in the flora of Iran. The plants of this genus are used traditionally for treatment of joints pain, gout, jaundice, and as insecticide. METHODS larvicidal activity of methanol 80% extract and partition fractions of hexane, chloroform, and ethyl acetate obtained from aerial parts of Ajuga chamaecistus su...

Thermodynamic analysis of the cracking of hexane has been conducted by the Gibbs free energy minimization method and second law analysis of overall reactions. By-products have been divided into three groups of methane, alkynes and aromatics and their possible production paths have been discussed. Effect of operating conditions such as temperature and steam-to-hexane ratio on the cracking perfor...

Journal: :Adsorption Science & Technology 1992

Journal: :iranian journal of catalysis 2012
abdol r. hajipour fatemeh rafiee

a simple and mild method for tetrahydropyranylation of alcohols is reported at room temperature using a catalytic amount of 3-methylimidazolinium hydrogensulfate([hmim]hso4) as a green, efficient and reusable catalyst. using solvent-free conditions, non-toxic and inexpensive materials, modest and clean work-up, short reaction times and high yields of the products are the advantages of this method.

Journal: :journal of arthropod-borne diseases 0
younoussa lame department of biological sciences, university of ngaoundere, cameroon. eliasnchiwan nukenine department of biological sciences, university of ngaoundere, cameroon. danga yinyang-simon-pierre department of biological sciences, university of ngaoundere, cameroon. ajaegbu eze-elijah department of pharmaceutical and medicinal chemistry, nnamdi azikiwe university, nigeria. charles okechukwu-esimone department of pharmaceutical microbiology and biotechnology, nnamdi azikiwe university, nigeria.

background : within the framework to control mosquitoes, ovicidal, larvicidal and pupicidal activity of annona senegalensis leaf extract and its 4 fractions against anopheles gambiae and culex quinquefasciatus were evaluated in the laboratory conditions. methods : ovicidal test was performed by submitting at least 100 eggs of mosquitoes to 125, 250, 500, 1000 and 2000 ppm concentrations, while ...

Journal: :Acta Crystallographica Section E Structure Reports Online 2009

نمودار تعداد نتایج جستجو در هر سال

با کلیک روی نمودار نتایج را به سال انتشار فیلتر کنید