The benzoin resin is used extensively in traditional medicine for its many reported therapeutic properties. The essential oils of three different types of benzoin resin were extracted using the traditional method in this study. The yield of essential oils of the white, red and gray types of resin was 1.01, 0.92 and 0.54%, respectively. The obtained extracts were tested against two types of pathogenic bacteria, Staphylococcus aureus and Escherichia coli. The tests showed that essential oil of gray type resin is effective against both Escherichia coli (14 mm) and Staphylococcus aureus (11 mm). The antioxidant activity has been also evaluated to compare the efficiency of different type of resin with DPPH· assay. In the DPPH· system, the antioxidant activity of the red resin extract (0.01 μg/mL) was superior to that of the white (27.32 μg/mL) and gray (42.90 μg/mL) extracts, with IC50 values, respectively.

In this study, we are interested in evaluating the performance of a system for purifying wastewater by plants in an arid climate. The treated water is wastewater from domestic sources in the region of the old Ksar Temacine (Wilaya of Ouargla, South-East of Algeria). The results show good yields for organic and particulate pollution. Drawdown rate of approximately 97.49 % of Suspended Solids (SS), 90.85 % of Chemical Oxygen Demand (COD), have been achieved. The system effectively removes nitrate pollution 100 % of ammonium and phosphorus pollution moderately 62.28 % of orthophosphates. The system shows a very high removal of total coliforms (90 %).

In this study, we are interested in evaluating the performance of a system for purifying wastewater by plants in an arid climate. The treated water is wastewater from domestic sources in the region of the old Ksar Temacine (Wilaya of Ouargla, South-East of Algeria). The results show good yields for organic and particulate pollution. Drawdown rate of approximately 97.49% of Suspended Solids (SS), 90.85% of Chemical Oxygen Demand (COD), have been achieved. The system effectively removes nitrate pollution 100% of ammonium and phosphorus pollution moderately 62.28% of orthophosphates. The system shows a very high removal of total coliforms (90%).

New compounds of phosphorus fluorinated 2,4,6-trimethylphenylazo pyridines (4a-c) have been synthesized in high yields via adding n-butyl lithium in hexane to a stirred solution of methyldiphenylphosphine oxide in dry THF at 0 °C, then cooled to around -78 °C, treated with azo-pyridines(2a-c) and then allowed to warm at room temperature over 2 h. The isomers of (E)-((5-chloro-3,6-difuoro-4-(mesityldiazenyl)pyridin-2-yl)methyl)diphenyl phosphine oxide (4b) and (E)-((3,6-difuoro-4-(mesityldiazenyl)5-methoxypyridin-2-yl)methyl)diphenyl phosphine oxide (4c) can be separated on analytical HPLC: Chiralcel OD-H column, hexane:2-PrOH, (9:1, v:v) mobile phase, flow-rate, 1.0 mL/min, 25 °C, λ = 254 nm and polarimetric detection, 20 µL injection volume. The resolution of this isomers were 2.12, 1.84, respectively.

Water for human consumption may contain pollutants, so it needs to be treated. A natural clay, Bildet Omar bentonite (southern Algeria), was purified and characterized by calcination, pH-metry, IR, XRD and SEM. The results obtained showed that the clay has a conductance of 66.4 μS, a cation exchange capacity (CEC) of 0.91 meq / g and contains 12% of organic matter. Characterizations by IR, XRD and SEM showed that Maghnia bentonite (B) is composed of quartz as major impurity, illite (7%) and mainly montmorillonite. This clay was saturated with sodium (Na +) and associated with iron (III), aluminum (III) and copper (II). The latter are inserted, by couple (Al-Cu, Fe-Cu and Fe-Al, 50-50% in atoms), in the inter-sheet space of the soda montmorillonite. The mass ratio metals / B is equal to 0.0625. The samples obtained are applied to fix the organic matter (MO) wastewater, very heavy, the city of Touggourt (southeastern Algeria). These organic materials represent 60% of suspended matter (MES). This work involves the study of urban wastewater treatment in the Touggourt town by natural processes. Water is used red and green clay from the region of Bildet Omar, it shows the importance of effective treatment of wastewater by clay. The results obtained show that:  The best clarification is achieved with the use of clay  Parallel treatment significantly reduces organic matter.  The use of yellow clay leads to a better elimination of turbidity and organic matter.

The experiment was conducted on alfalfa seeds that were brought from Marjajah in the city of Touggourt. After the traditional extraction process, some of its physical properties were measured, including, refractive index, pH, with a yellowish green color, odor, prick, and transport value of 363 cm/S and on blood clotting. The results showed that the seed extract of alfalfa has an effect on blood clotting on the internal and external pathway by the prothrombin rate (TP) obtained that sample 1 has the largest clotting time of 22 seconds and by the time of cefalin kaolin (TCK), the highest coagulation time for sample 2 by 46 seconds. The prothrombin rate and the time of cefalin kaolin chronometer tests also show that alfalfa seed extract exercises an important anticoagulant activity compared to the two coagulation methods, because this activity is more pronounced towards the internal pathway that the external pathway passes, that is, the alfalfa seed extract is better than the normal witness and less than the positive witness heparin.