It is important to consider that these extracts were unpurified and may contain both polar and apolar
compounds, therefore the cytotoxic, antioxidant and antimicrobial activity may be due to different compounds and that there is no general relation between antioxidant, cytotoxic and antimicrobial activity.
Despite these efforts, wholly exfoliated morphologies are rarely achieved, especially with apolar
polymers such as polyolefins, and resort to the use of appropriate compatibilizers, such as polymers grafted with maleic anhydride (MA), may be necessary.
Even if the percentage of apolar
, mid-polar and polar compounds appeared to be different between these species, some similarities inside a genus could however be observed (Cladonia, Parmelia).
Medout-Marere (46) measured values of the Hamaker constant for different materials by immersion calorimetry in apolar
Although tannins, flavonoids and phenolic acids are the main components of the crude methanolic extracts of these Hypericum plants, it worthwhile to mention that the most apolar
fractions of H.
R] 30B), and with apolar
intercalents (20), (21) (Nanochore 1-30).
The data suggest that the plant leaves contain as yet unidentified polar compound(s) with potent inhibitory activity against polymorphonuclears and chemically different apolar
molecule(s) which inhibit both prostanoid and leukotriene synthesis (Asmawi et al.
On the contrary, the apolar
character of PP makes it an incompatible matrix for clays.
In addition to the vehicle, the active cream contained 5% of an apolar
extract of St.
Two types of tests were conducted to measure the contact angle: (1) polymer solution and metal surface, and (2) polymer solution and metal surface immersed in an apolar
Surface free energy was defined as the sum of the Lifshitz-van der Waals apolar
(LW) component [[gamma].
This material, with a low level of almost apolar
compounds (hydrocarbons, long-chain alcohols and other lipids) was then submitted to exhaustive extraction with ethanol in a Soxhlet device.