This study aimed at investigating the effect of some environmental factors on the phenolic
contents of the Rhus cotinus L. plant. Plant samples (leaves, flowers and bark) were
collected from three aspects (south, west and north) at four altitudes (
0-300, 300-600, 600-
900, ˃900m) in the countryside of Jableh in 2016. The fresh samples were extracted using
95% ethanol as an extraction solution, then the total contents of the phenolic compounds
were determined spectrophotometrically using the Folin-Ciocalteu reagent, expressing the
result by (mg gallic acid/1g fw) using a Spectrophotometer.
This work discusses the feasibility of applying a small and inexpensive GPS, a Field
Strength Meter (FSM) and a personal computer, that can activity and rapidly determine
the Geo-locations of RF cooperated emitter, which have a wide range of both m
ilitary and
civilian applications.
The emitter’s Geo-coordinates can be estimated by a single moving observation
system, which receives signals from the emitter, and measures his Geo-locations and Field
Strengths of the transmitted signal at four Positions
Analytic Formulas are derived to calculate the location of Emitter, which detected
from four Positions by using of Linear Algebra or pseudo range’s solution, The MATLAB
was used to solve the four Equations and to simulate the Geo-Positions on Geo-Map.
The Earth's gravity field is related to the Earth's mass and shape and to the
position, where we apply the measurement.The measured value in any place
depends on the altitude of the place angle and Earth's rotation speed around
itself.
In the pap
er we present a theoretical idea connecting the value of gravity with
the above mentioned amounts. Next we calculated the value of this field in
some Syrian cities.
The paper is ended by important note, that the obtained relations allowing to
calculate the value of the gravity field depends on the place altitude, not on the
one's Longitude.
This study was carried out in nine sites of various altitudes. The sites represent
scattered zones of Cordia myxa Forsk. as an introduced species in the coastal region,
Lattakia governorate during 2010-2011. The research showed that there is an eff
ect of
altitude on the investigated trees in the different sites, and that there were significant
differences in relation to the characteristics of the average of the following: tree height,
length of leaf stalk, catkin length, canopy, fresh and dry leaf weight, and fruit weight.
However, there were no effects of altitude on the species. There were also no observed
significant differences in relation to the characteristics of the average of the following: the
tree diameter, trunk length, flower number in one catkin, leaf length, leaf width, leaf area,
leaf humidity percentage, flowering start, and flowering period. It can be said that there
were changes in the morphological characteristics of the studied trees in the different sites,
which appeared to be a preliminary indication of the impact of altitude on the variations of
some morphological characteristics of Cordia myxa Forsk.
This research was carried out in five sites varied in altitude representing Mediterranean vegetation zones of western slopes of Lattakia Mountains during 2010 - 2011 on Quercus infectoria Oliv species. Research shows that significant difference of al
titude above sea level has obvious effect on seed germination in different sites. This is noticed in characteristics related to fruit weight, germination rate value sum, and height of vegetal and rooty seedling after four months of germination. Altitude above sea level has no effect on the branchlet number of rooty and vegetal sum height of seedlings as well as mean of leaves number of seedlings. According to germination ratio and daily germination ratio, in addition to seedling diameter, there is harmony among all sites. It can be deduced that there are changes in growth traits of studied seedlings in different sites. This is the primary indication of the impact of the altitude above sea level on seedling traits of Quercus infectoria Oliv.
