نتایج جستجو برای: 99 standard method with hexane and acetone solvents
تعداد نتایج: 18593444 فیلتر نتایج به سال:
HIV is the etiological agent of AIDS that has created major health care problem throughout the world. The aim of the present study is to evaluate the cytotoxic effects and anti-HIV activity of Phyllanthus niruri whole plant extracts. Hexane, chloroform, ethyl acetate, acetone and methanol solvents were used to prepare the extracts by sequential maceration method. RetroSys HIV-1 RT (Innovagen, S...
in solvo-hydrothermal method, xrd pattern was indicated presence of intermediate of ammonium octatmolybdate and ammonium tetramolybdate, which were changed to stble phase of ?-moo3 annealing. sem images were indicated nanoparticle with semispheical morphology and tem image was demonstrated nanoparticles with a diameter size of 25nm. also in impregnate method. the xrd pattern was shown high crys...
The ability of Leea philippinensis, an endemic tree in the Philippines, as in vitro free radical scavenger was investigated. Soxhlet extraction using solvents in increasing order of polarity (hexane<chloroform<ethyl acetate<acetone<methanol) yielded acetone and methanol extracts with the highest Total Phenolic Content (TPC) and Total Flavonoid Content (TFC). These crude extracts were further se...
In this study, we evaluated the suitability of six common organic solvents for gas chromatographic (GC) analysis of pesticides. Three of these, acetone, acetonitrile (MeCN) and ethyl acetate (EtAc), represent extraction solvents commonly used in multiresidue methods for determination of pesticides in produce. The other three, isooctane, hexane and toluene, often serve as exchange solvents befor...
Gravimetric fat data were obtained for a wide range of dairy products with fat contents ranging from 0.5 to 83% using pressurized solvent extraction at elevated temperatures and pressure (80-120 degrees C; 10.3 MPa). Extraction performance was sensitive to solvent composition, temperature, and sample matrix. By optimizing solvent mixtures, sample-solvent contact times of 8-10 min were sufficien...
abstract: postmethod is a newly developed pedagogy which as an alternative to method rejects the notion of good or bad methods and the concept of best method that can be generalized and appropriate for all contexts. instead, it treats each context as unique and one of a kind which cant be compared with other cases. this study is a postmethod-oriented one which investigates whether and how far t...
asymmetric polyethersulfone (pes) microfiltration flat sheet membranes were composed by the phase inversion method (pim) and were used as supports. composite membranes were fabricated by coating silicone rubber as selective layer. effect of different concentrations of pes and pdms and different solvent such as nmp, dmf and dms effects as pes solvents and support thickness and different coagulat...
BACKGROUND Tuberculosis, caused by Mycobacterium tuberculosis (MTB), is the most notified disease in the world. Development of resistance to first line drugs by MTB is a public health concern. As a result, there is the search for new and novel sources of antimycobacterial drugs for example from medicinal plants. In this study we determined the in vitro antimycobacterial activity of n-Hexane sub...
The aim of this study was the use and revalorization two persimmon by-products A B generated in juice production process. by-product resulting from a pectinase enzymatic treatment peels pulp to optimize extraction especially suitable for recovery valuable bioactive carotenoids. solvents solvent combinations used were: ethanol, acetone, ethanol/acetone (50:50 v/v) ethanol/acetone/hexane (25:25:5...
Arabian deep-sea red shrimp Aristeus alcocki is considered to be an ideal source of pigments, especially astaxanthin, and its analogs. Extraction pigments from exoskeleton discards A. was analyzed by using organic solvents, namely, n-hexane, acetone, ethyl acetate, methanol, ethanol under cold hot conditions. A significantly greater yield obtained acetone: methanol (1:1 v/v) (10.4-10.9%) (9.3-9...
نمودار تعداد نتایج جستجو در هر سال
با کلیک روی نمودار نتایج را به سال انتشار فیلتر کنید