نتایج جستجو برای: extraction efficiency

تعداد نتایج: 544647  

2017
Caihong Xu

The reviewer appreciate the additional experiment done by the authors about DNA extraction efficiency. However, the efficiency reported in the response seems to be recovery efficiency of DNA associated purification and elution steps, and not efficiency of DNA extraction from fungal cells. In this case, the authors had to spike fungal spores, not naked fungal DNA or PCR amplicons, as an external...

2010
Jinghua Wang Hongyou Cui Shuqin Wei Shuping Zhuo Lihong Wang Zhihe Li Weiming Yi

Supercritical CO2 extraction was employed to separate simulated and real bio-oils. Effects of extraction pressure, temperature and adsorbents on distribution coefficient (or enrichment coefficient) of five representative compounds were investigated using a simulated bio-oil, which was composed of acetic acid (AC), propanoic acid (PA), furfural (FR), acetylacetone (AA) and 2-methoxyphenol (MP). ...

1995
Valery Biryukov

The Fermilab crystal-extraction experiment E853 at Tevatron was simulated by Monte Carlo code CATCH [1] tested earlier in the CERN-SPS experiment [2–4]. Predictions for the extraction efficiency, angular scans and extracted beam profiles are presented. Several ideas are proposed and tested by the simulation, how to get in E853 the key information of the extraction experiment: the ”septum width”...

Journal: :Analytical sciences : the international journal of the Japan Society for Analytical Chemistry 2006
Yu Bai Hai-Jian Yang

4,4'-Bis(dihexylaminocarbonyl)-2,2'-bipyridine (BDC-Bipy) was synthesized and studied systematically as a chelating reagent for metal ions extraction in supercritical CO(2). The compound showed high extraction efficiency for Co(2+) (100%), Cu(2+) (100%), Cd(2+) (98.2%), and Zn(2+) (100%) ions and good extraction efficiency for Sr(2+) (79.4%) and Pb(2+) (89.8%) when the extraction was performed ...

In this study, extraction of amoxicillin (AMOX) ions from aqueous solution by liquid-liquid extraction (LLE) was investigated. The LLE process by response surface methodology (RSM) was carried out based on central composite design (CCD). The organic phase consisted of extractant and toluene as diluent. In this process, triethylamine (TEA), di-2-ethylhexyl phosphoric acid and mono-2-ethylhexyl p...

2015
STELLA VETOVA IVAN IVANOV

The following paper presents a new Content-Based Image Retrieval algorithm. In its realization , we applied the Dual-Tree Complex Wavelet Transform for image features extraction and Hausdorff distance for similarity distance computing between the feature vector of the query-image and the image feature vectors stored in the image database. To estimate its efficiency, we performed some experiment...

Journal: :international journal of environmental research 2010
s. shegefti h. sereshti s. samadi

water contamination due to the wide variety of pesticides used in agriculture is a global environmental pollution problem. in order to reach at sub-î¼gl-1 levels of detection, an efficient extraction technique is required. a simple, fast and economical method, dispersive liquid-liquid micro extraction (dllme), followed by gas chromatography-mass spectrometry was assessed for determining endosul...

Journal: :analytical and bioanalytical chemistry research 0
faezeh khalilian department of chemistry, college of basic science, yadegar -e- imam khomeini (rah) shahre rey branch, islamic azad university, tehran, iran mohammad farajvand department of chemistry, college of basic science, yadegar-e-imam khomeini (rah) shahre rey branch, islamic azad university, tehran, iran

a solid phase extraction sorbent based on polyaniline/graphene nanocomposite is presented. the structure and morphology of synthesized nanocomposite were investigated by fourier transform infrared spectroscopy, field emission scanning electron microscopy, x-ray diffraction and thermal gravimetric analysis. the dispersive solid phase extraction was employed to the isolation and preconcentration ...

2017
Zhun Li Bing Yu Hailin Cong Hua Yuan Qiaohong Peng

Recently, the solid phase extraction technology has received considerable attention considering serious environmental problems and much more contaminants present in the samples at trace level that is different to be analyzed. During the whole process of analyzing sample, the preconcentration of sample is the most complicated and significant step, which typically spend much time, affecting the a...

Journal: :The Science of the total environment 2013
Qing Zhao Baoshan Xing Peidong Tai Hong Li Lei Song Lizhu Zhang Peijun Li

This work was initiated to study the concentration effects on phenanthrene and pyrene extraction during process of aging in phaeozem and burozem with or without freeze-thawing cycles. 1, 10, and 100 μg g(-1) phenanthrene and pyrene contaminated soils were extracted by 10,000 mg L(-1) surfactant SDBS at various times. The extraction amount decreased with increasing contact time. Aging process co...

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