The research was conducted in Al-Bassa village, Lattakia Governorate/Syria,
during the agricultural seasons 2014/2015 and 2015/2016, in order to study the
most important economic traits of the selected plants from plant population of
local vetch,
which seeds was obtained from farmers who keep their local seeds and
grow it season after another. The analysis of variance results (ANOVA) showed
significant differences between the selected plants (200 plants) in all studied
traits, which shows the importance and effectiveness of the individual selection
to get high degree of homogeneity plants, which have many desired phenological,
morphological, physiological and productivity characteristics of local vetch. Taking
into consideration that seed productivity was adopted as a determining factor for
the election. The study also showed the possibility of increasing the productivity of
the local vetch populations through the use of superior plants selection (plants No.
9, 21, 26, 47, 52, 78, 105, 118, and 199), and the possibility of doubling production
through the use of promising plants which were selected (plants No. 9, 26, 47, and
199), and use them in subsequent breeding programs, as they represent an important
genetic tank of many desirable traits.
This study investigated the effect of adding different
percentages of sand to several types of clay soils, Which used as
liners at solid waste landfill sites in order to find the best mixing
ratio (sand - clay).
This study presents definition of the types of lightweight concrete and
some studies, which use the volcanic scoria aggregates to produce
structural lightweight concrete.
Several concrete mixes were designed, and different tests were
performed to
determine its properties.
The current investigation was conducted to study some
productive properties( body weight, body weight gain, feed intake,
feed conversion ratio, carcass composition, and carcass cuts ) on
some broiler strains in Syria ( Ross, Hubbard, and Shefer ).
This research presents an experimental study behaviour of high strength concrete, for
evaluation of stress - strain curve and derivation of factors of equivalent compressive
stress block, we depend it in design of high strength concrete elements.
For this purpose, number of cylinders specimens with strength 60 MPa were prepared
and tested in compression, then curve was obtained.
The results showed the possibility of producing high strength concrete from local
materials and with strengths are highest than those were obtained, the resulting diagrams of
curve are shown to be essentially linearly elastic up to failure with a steeper declining
portion of the stress - strain diagram, which agree with the results of global researches, the
failure was almost sudden and rapid with increasing strength which shows that the highstrength
concrete less ductile than normal concrete at the failure. Curve of high strength
concrete differs from that normal concrete, this affects on the properties of rectangular
equivalent stress block which requires modifications on the factors led to optimum represent
for it and with evaluation of curve of the tested specimens, the diagram takes a
trapezoidal shape ( ), its value at the top is and the depth of the compressive
block is and we found and ( is average compression/cylinder
compressive strength of concrete, is ratio of the active depth that defined location of
compression force center), when concrete strength increases up , the diagram
shape will be closer to triangular than trapezoidal and then curve takes the shape of triangle its
value at the top is and the depth is and with replacing triangular diagram to rectangle.
Recently, the importance of high Strength concrete has appeared due to its
application in manufacturing most of the concrete structures and members, as well as to its
importance in the implementation of civilian facilities like bridge bases, skyscr
apers and in
implementing the columns and platforms which carry oil installations carried out in the
oceans and seas. The research aims to design concrete mixtures with cylindrical resistors
( 55- 65- 75 Mpa) according to the American code AcI-211-4R-93 by using local and
appropriate additions as well as explaining the method used in designing. Then, studying
the transformation in stress strain curve – deformation
(σ- ζ ) undergoing a simple pressure on the previous samples throughout the
available devices. Then, it was compared to the charts obtained mathematically .Law
behaviour of stress strain and deformation curve was rated, in addition to modulus of
elasticity taken from the chart.
Couple of results and recommendations related to the issue were concluded, those
which were applied in praxis.
This research was carried out to study some hattching egg traits and chick weight at
day old in black type of Syrian local hens and Egyptian Fayoumi strain , and study the
differences in egg traits and chicks which come from hybrization between Syr
ian black
male and Fayoumi female.
Results showed that the average egg weight of Syrian hens was 52.33 g and of
Fayoumi hens was 46.86 g .
The fertility rate increased in hybrid egg compared with parents . It was87.94% in
hybrid compared with 84.08% in Syrian hens and 77.22% in Fayoumi strain hens.
The day old hybrid chick weight increased compared with Fayoumi chick. It was 32g
in hybrid chicks while it was 30 g in Fayoumi chicks , and it was lower compared with
black Syrian chicks (35g). Hatchability rate was 89.5% and 92.3% in Syrian local hens
and Egyptian Fayoumi hens respectively .And this rate decreased to 82.6% for the hybrid .
Chicks hatched decreased to 69.2% for hybrid compared with 72.93%for Syrian local hens
and 69.44% for Egyptian Fayoumi hens .
The mortality of hybrid chicks was 3.3% , it was lower compared with mortality of
Fayoumi chicks (6.05%) and higher compared with mortality of Syrian chicks (2.22%).
The aim of this study is isolating brucella and using polymerase chain reaction technique for the molecular characterization of Brucellamelitensis,which causes caprine abortion. It also aimsto determine the rate of caprine abortion that is caused by
Brucellamelitensisin the Middle region of Syria. For this purpose 58 abortion samples were collected (36 aborted fetuses, 22 vaginal swabs). The results of bacterial isolation and polymerase chain reaction reveal that the prevalence of caprine abortion caused by Brucella melitensis was 53.4%. The study also reveals that using stomach contents from caprine aborted fetus can be the best site for brucella isolation. Running differentiation tests to distinguish field strains from vaccinal strains refer to the presence of 2 isolates(6.4%) belonging to vaccinal strains(Rev1) from 31 isolates of Brucella melitensis.
