The oil is never allowed to go through the solvent extraction process so it is free from the harmful effects of hexane
Preparation of extracts: The aqueous, hydroalcoholic and hexane
extracts were obtained by cold maceration of the L.
Two milliliters of the aqueous, hexane
and ethyl acetate extracts were dissolved individually in 2M hydrochloric acid and filtered.
Lactuca sativa roots responded differently to the exposure to hexane
and methanol extracts.
All of the algae samples were extracted in the same way and methanol, n-hexane
, ethyl acetate, acetone: hexane
, and chloroform: methanol solvents were used.
Figure 1 demonstrate that the addition of increased volumes of hexane
leaf extract and EDTA as a standard induces a significant (p [less than or equal to] 0,01) decrease dose-dependent in the optical density at 562 nm compared to the control suggesting that the hexane
extract possesses a high capacity to iron chelate where the absorbance obtained decreased to a lesser extent 0,2 [+ or -] 0,011 compared to the EDTA (standard chelator) 0,04 [+ or -] 0,013.
It is observed that hexane
can be used effectively as solvent in lipid extraction rather than combination of cyclohexane/butanol because of its specificity towards the desirable contents of glycerides.
fraction reduced the normal seedling percentage to zero at an estimated concentration of 0.
Methanol, ethanol, acetone, water, hexane
, ethyl acetate, chloroform, diethyl ether, hydroxytoluene (BHT), DPPH (1,1-diphenyl-2-pcyrilhydrazol), rutin.
Gases detected include benzene, ethanol, ethylbenzene, heptane, hexane
, isoprene, methanol, MEK, MIBK, octane, pentane, 1-pentene, toluene, xylene, butane, ethane, methane, propane, ethylene and propylene, www.
A total of 1 kg of dried and powdered leaves was subjected to sequential extraction using 3 L of hexane
, chloroform and ethyl acetate for a period of 48 h to obtain the crude extracts using rotary vacuum evaporator.
Dichloromethane (DCM), hexane
, methanol (MeOH), 2, 2--diphenyl--1--picril--hydrazyl (DPPH), ascorbic acid, dimethyl sulfoxide (DMSO) and ethanol were purchased from Sigma-Aldrich, USA.
According to the Centers for Disease Control, very small amounts of hexane
may be present in cooking oils due to processing, but the amounts are too low to have any effect.
The remaining saponified fraction was acidified and free fatty acids were extracted with hexane
5 g in 5 mL), in addition formamide, ethanol, hexane
, heptane and water were characterized as nonsolvent.