In this research, the relation which describes the electric permittivity of
emulsion was theoretically found. After that, a Matlab code was used to study
the behavior of mixed permittivity changes versus the ratio between forming
layer thickness a
round particle to its radius. We noticed from the graph that
the contribution of heterogeneous term in electrical permittivity take values in
the range corresponding to particle size in the range
at definite value of concentration C =0.01. In addition, the
contribution of heterogeneous term in electrical permittivity is proportional
with the forming layer and inversely with particle radius.
This study has multi-field application as: oil products, pharmacy materials,
nutrients and cosmetic materials
This study deals with the determination of total mercury concentration in the water
taken from three sites on Al-Kabeer Al-Shemaly River ( near the industrial area and Al-
Damat Lake, and 16 Tishreen Lake), also the effect of some physio-chemical p
arameters
including: DO, pH, T °C. of water in the three sites was studied.
Results showed that the total mercury concentration was low in general, where the
medium concentration in the three studied sites was 0.29 ppb and it was less than the
permission level of total mercury in the surface water(> 10 ppb), the higher value of the
medium concentration of total mercury(0.35, 0.31, 0.21)ppb was recorded in the Industrial
Area, Damat Lake, then 16 Tishreen Lake, respectively. For the changes in the total
concentration of mercury in the three studied sites during seasons of a year, was higher in
Summer comparing with other seasons. The results showed positive correlation coefficient
between the total mercury concentration and temperature, pH value, but it was negative
with DO in Summer.
The purpose of this research is to apply a mathematical program to
calculate water and chemical balance in unsaturated soils, under the
influence of different methods of irrigation, in order to monitor the
amount of vertical drainage of water insi
de the soil and choose a
irrigation method that can reduce the phenomenon of groundwater
pollution.
Three irrigation methods were tested with different fertilization
method. The study was conducted in the western part of Homs
Governorate (AlQusair orchards).
- The objective of this study was to assess the level of air
contamination by bacteria in the broiler houses in salamieh region
that Famed of commercial breedings of broiler and relationship
with some impact factors like (birds age- season-breedin
g system -
dust concentration) .
- The numbers of bacteria (mesophile , staphylococci , streptococci
and gram-negatives) and dust concentration were determined in 5
opened broiler houses and 5 closed broiler houses with chicken
houses in different ages (1-6 weeks old) in summer and winter .
We discussed the importance of studying the trichomes award in
olive trees, leaves and its role in the resistance to these trees against
pollution resulting from the Banias refinery intake, through the
study of their density and distribution on a
superficial paper and
examine the concentration of chlorophyll in the leaves, and
comparing the results between the contaminated areas and the
control area .
Results showed that the density of the trichomes play a role in
protecting the ports of entry into force of pollutants into the plant
tissue, and its impact on the pigments of photosynthesis, and thus
the process of photosynthesis.
Bleaching process of cotton fabrics consider an important and
sensitive operations in wet chemical treatments of cotton fabrics,
mercerization is not less important than them and that in cases in which
is made necessary, but from the problems of t
hese processes are long
time and consumption of energy, but the ultrasound energy contribute
to reduce these problems.
The free iodine (I2) in povidone-iodine (PVP-I) solutions is responsible for its
bactericidal activity, the bactericidal effect is steadily increased with the free iodine
concentration. This study aims to compare some of povidone-iodine solutions c
ommon at
the local market with one solution produced by Mundipharma company (Betadine®) which
used as a reference. Commercial samples (PVP-I 10%) were obtained from three local
companies (A, B, C), with one batch from each company. The research included
controlling free iodine concentration, pH and evaluation of bactericidal activity by using
disc diffusion method and rapidity of the bactericidal activity on both Staphylococcus
aureus and Escherichia coli. The local samples solutions showed low pH values compared
with Betadine®, furthermore, all the solutions extracted by heptane showed high levels of
free iodine with a preference for one local company. The high level of free iodine was
accompanied with an increase of inhibition diameter and rapidity of bactericidal effect.
This paper aims to study the distribution of free nitrogen atoms through surface of α – Fe sample using the numerical solution for linear differential equation by means of Crank – Nicolson method at a temperature range ( 550 to 950 0C) and time inter
val (0 – 8)h where the nitrogen diffusion constant is at 850 0C and 8h.
Under the supposed condition this study has illustrated that the diffusion depth of nitrogen atoms from surface towards inners reaches to ̴ 1.2mm, i.e., determining the layer thickness of the formed nitride compounds which gives the surface layer of α – Fe high resistance against corrosion processes resulting from surrounded environment.
The Anaerobic Ammonium Oxidation (Anammox) is a new method
to reduce the concentration of nitrogen in waste water , this reaction oxidizes ammonium to nitrogen gas and results little amount of nitrate by using ammonium as electron donor , and nitrit
e as electron acceptor in anaerobic conditions and in absence of organic carbon.
The inorganic carbon is very necessary to the growth of Anammox
bacteria and to produce new cells , because this bacteria effect
negatively with organic carbon.
Monodispersed CdSe Nanorods nanoprticles with sufficient luminescence intensity have been prepared by chemical method in solution phase. CdSe as a core covered by Olic acide as an organic capping agent. The nanodots size obtained by two methods: dir
ectly from high resolution transmission electron microscopy (TEM) and using absorption peaks comparison with literature, the two methods are in good agreement. The optical properties and the luminescence intensity as a function of CdSe NRs concentration and the type of solvent (Chloroform and Toluene) have been investigated. The intensity of photoluminescence peak decreases and the peak shifts toward the blue energy side as the concentration reduced. The results show the relation between the polarity, the effect of surface, concentration, and the quantum effect on the optical properties.
