Organizing co mmittee

SURFACE ACTIVITY OF Rumex SPECIES 
N.M. Ashirmatova
1
, Kh.I. Khasanova
1
, R.R. Maxkamov
2
, 
Sh.K. Samandarov
2
, K.A. Eshbakova
1
 
 
1) S.Yu. Yunusov Institute of the Chemistry of Plant Substances Academy of sciences of 
the Republic of Uzbekistan st. Mirzo-Ulugbek, 77, 100170 Tashkent 
e-mail: [e-mail] 
2) Institute of General and Inorganic Chemistry of the Academy of Sciences of the 
Republic of Uzbekistan 
The study of colloid-chemical properties of substances with biological surface-active 
properties isolated from plants is very important, because today the demand for 
biological surface-active substances obtained from natural, ecologically harmless and 
renewable raw materials is increasing. In particular, it is widely used as an emulsifier, 
stabilizer, plasticizer, flocculant and filler in pharmaceuticals, cosmetics, perfumery, 
food, detergents and other industries. 
Surface tension is one of the colloid-chemical properties of substances with 
biological surface-active properties. That is, the ability to reduce surface tension by 
adsorbing to the phase boundary between two liquids, gas and liquid, liquid and solids. 
R
. confertus, R. pomiricus, R. syriacus, R. aquaticus
and 
R. tianschanicus
above-
ground and root parts were extracted in 70% alcohol and the obtained extracts were 
divided into extraction extraction benzene, chloroform, ethyl acetate and n-butanol 
fractions in the order of increasing polarity. 
Critical concentrations and surface tensions of micellar formation of biological 
surfactant samples extracted from plants were determined (Table 1). 
Table 1 
As can be seen from the results in the table, extracts isolated from plants significantly 
reduced the surface tension of water from 72.8 mN m
-1
to ~ 28.0-57.0 mN m
-1
. This 
indicates that the extracts contain molecules with a complex diphilic structure. 
Extracts isolated from these plants are well soluble in water, do not have a toxic and 
pungent smell, and exhibit positive biological surface activity in aqueous solutions, 
which allows them to be used as emulsifiers, stabilizers, and plasticizers in detergents 
and the pharmaceutical industry.