The study was carried out in apple orchard and at the laboratories of Agricultural
Scientific Research Center, and Pome and Grapevine Division in Sweida (GCSAR),
Syria, during the growing seasons of 2015 and 2016 to study the effect of organic
res
idues, and boron and zinc addition on some soil characters, fruit set ratio and
some fruits qualitative traits in Starking delicious apple cultivar in Sweida.
This study determined total quantity and exchangeable form
concentration of zinc and lead in the agricultural soils in the Banias
region. Soil samples collected from five sites from the north-east of the
thermal station.
In this work the electrochemical behavior of Para-nitro aniline
and metoxy benzealdehyde was studied by cyclic voltammetric
method on glassy carbon electrode in alkaline medium . It was
found that the Para- nitro aniline needed five electrons to reduce to
the azo group.
This research aims to study the effect of adding alloying elements and heat treatment
of Zinc metal on solar energy absorbing , nine alloys ingots were manufactured by
changing the percentages of added Aluminum and Copper on the pure Zinc, and thes
e
ratios of Aluminum were : (10% , 20% , 30% , 40 % , 50%) to demonstrate the effect of
adding Aluminum to Zinc metal on solar energy absorbing , and ratios of copper were :
(20% , 40%) , as well as we prepare two pure zinc samples with 99.2% of purity , one
was rapidly cooled and the other slowly cooled , to demonstrate the effect of heat treatment
on solar energy absorbing .
In order to measure the solar energy absorbing for prepared samples , we
manufactured a device depends on the methods of heat exchange between solar radiation
and the surface exposed to radiation .
The obtained results showed that adding Aluminum and Copper to the pure Zinc
caused a decrease in solar energy absorbing .
As well as increasing the percentages of adding Aluminum and Copper to the pure
Zinc caused a gradually decrease in solar energy absorbing .
comparing the absorbing of pure zinc samples, one was rapidly cooled and the other
slowly cooled , the results showed that the sample was rapidly cooled was better than the
sample slowly cooled on solar energy absorbing .
The experiment was carried out to study the ability of Cu and Zn
adsorption on natural Zeolite using six concentration of Cu and Zn
(50, 100, 150, 200, 250, 300) mg.L-1 and two different diameters
of Zeolite particles (0.5mm-1mm). The research aim
ed to define
the ability of Freundlich and Langmuir isotherms equations.
specifically coefficient R2 was used to determine the suitability of
these isotherms.
This study aimed to estimate the level of air pollution in some portable heavy metals
in dust quarries by needles of Pinus brutia Ten. as biomonitor In site of Kfardabeel Stand-
Jableh. The samples of dust and leaves were collected at the end of Ju
ly in 2016, Atomic
absorption spectrophotometer was used to determine the amounts of Lead, Zinc, Nickel
(ppm, dry weight).
The average of accumulated metals in the needles were estimated: (Pb= 45.57 ppm,
Zn= 13.64 ppm, Ni= 7.64 ppm), while their amounts in the dust were done as following:
(Pb= 66.1 ppm, Zn= 15.8 ppm, Ni= 19.6 ppm). The results showed that the studied site is
polluted with Pb and Ni whereas Zn is in the natural range. a strong correlation between
heavy metals amounts in the needles and their amounts in the trapped dust (r= 0.98) was
detected, also regression equations have explained the variations in accumulation of
studied metals in relation to the accumulated dust on needles as following: 40% Pb, 40%
Zn, 20% Ni. Consequently results confirmed the possibility of detecting the atmospheric
Pb, Zn, Ni pollution in the studied site using P. brutia Needles as a biomonitor.
Zinc Chromate was synthesised by Co-precipitation
method, The synthesised samples were characterized using
X-ray powder diffraction technology (XRD).
Set temperature synthesis at 250 ℃ .
This study has been conducted to identify the levels of heavy
metals (lead, cadmium, nickel, cobalt, copper, iron, manganese, and
zinc) in the following spices: Nutmeg, turmeric, cinnamon, ginger,
cardamom, nigella sativa, black pepper, cumin, coriander, curry,
and mixed spices.
This research aims to study the effect of adding Zinc Borate and
Aluminum Hydroxide as flame retardants to Low Density
polyethylene.
Specimens have been prepared through pouring them in a mold.
Results have revealed that replacement of certain am
ount of
Aluminum Hydroxide with Zinc Borate could lead to improving the
resistance of flame spread in Low Density polyethylene.
these improvements were basically due to further contribution of
Zinc Borate to the physical barrier mechanism of Aluminum
Hydroxide in both gas and solid phases.
We studying in this research the reaction with Zinc sulphate in an
aqueous solution by physical - chemical method in presence of
Succinic Acid , and determined compounds which are formed in
this solution and we calculated of it formation the const
ants.
After we used these electrolytes in plating by Zinc , that is by
electro precipitation of this metal on the solid electrodes (steel,
copper) so that we definite the best of these electrolytes for galvany
and the set necessary conditions for its use.
