This investigation was carried out in the fields and laboratories of Pome and
Grapevine Department, GCSAR/Syria, on some apple varieties i.e. Richared,
Mutsu and Tourly Winsap to determine the optimal harvest date and its effect on
storability. Fr
uits were harvested in (16/9, 26/9, 7/10, 17/10 and 30/10) depending
on physical and chemical maturity indicators, and stored with the study of changing
in quality indicators and weight lost monthly. The results showed that the studied
varieties differed in their storability according to harvest date, Richared fruits in
26/9 showed long storage for seven months with weight loss of 4.9%, fruit firmness
6.4 kg/cm2, and 18.7% TSS. While the storability was six months for Mutsu fruits
which harvested in 7/10 with weight loss of 4.4%, and fruit firmness 6.1 kg/cm2,
and finally, Tourly Winsap fruits which were stored for five months in 7 and 17/10
harvest dates with fruit firmness 5.1 kg/cm2. Moreover, the three varieties were able
to storage for three months when harvested in 30/10 with weight loss of 3.3%, 4.4%
and 4.5% in Tourly Winsap, Richared and Mutsu respectively, which considered
as consuming maturity for these varieties. These results indicated to the various
storage periods according to fruits harvest time, and the storability, which assists
in regulating offer and demand, and providing markets with fruits for long period,
however harvesting at optimal time reducing the total weight loss, in addition to
high quality indicators.
Ceramic Sample of tin doped pure barium titanate prepared by solid-state reaction at
a sintering temperature of 1350˚C for 3.5h. The electrical properties of ceramic BaTi1-
xSnxO3 studied for the ratios (x= 0, 0.05, 0.07, 0.1, 0.12, 0.15, 0.17), as
a function of
temperature from 0˚C to 170˚C at 1kHz. The maximum value of the dielectric constant
reached to έ=6568 for the content x=0.1 at the temperature Tc=50˚C. The phase transition
for barium titanate was of the first type with γ=1.07. The degree of the transition changed
by increase the ratio of added tin. Where the maximum value of transition degree γ=1.46 at
the ratio x=0.15. Curie constant decreases with increasing ratios of tin added to the ceramic
samples.
Ceramic samples of calcium doped barium titanate have been prepared from highpurity
raw materials by using solid-state reaction method at a sintering temperature of
1350˚C for 3.5h. The electrical properties of ceramic samples Ba1-xCaxTiO3 have bee
n
studied for the ratios (x = 0, 0.1, 0.3, 0.5, 0.7, 1), as a function of temperature within the
range of 25˚C to 220˚C at the frequency 1kHz. Experimental results show that the Currie
point moved within the temperature range from 120˚C to 150˚C by change of calciumadded
ratios. Dielectric constant decreases by increasing the calcium-added ratios. The
maximum value of the dielectric constant rached to έ=6898.85 for barium titanate at the
temperature Tc = 132˚C. We got the high values of the tangent loss angle at both ends of
the studied temperature range. Curie constant decrease of the samples by increasing the
additional calcium ratios.
This work includes study of Co Zn-ferrite samples doped by Ni which prepared by Ceramic method. Then verified that it had spinel structure by using XRD. In addition we study properties such as electrical resistivity , electrical conductivity , dielec
tric constant and loss coefficient. And also we have studied variations of this properties in terms of temperature at different frequencies in the range of (20 -105) Hz.
يعتبر القطن ( Gossypium s. p. p. ) من أهم المحاصيل الاستراتيجية في سورية حيث يعمل أكثر من مليوني شخص في زراعة وصناعة وتجارة محصول القطن .
This research deals with the study of the manifestations of the pre-Islamic poet
complaint of a lifetime, and through the manifestations of misery and helplessness;
complained forever that reflected the negative forces in both picture of ruins and
inability.
In fact, this points to horror as long he tried to draw a nominally to relax, or to prepare for
a specific matter. This horror is no more than time, as we find in this research a sense of
impotence, and the al-Jahili tries to overcome it at times, and surrender at others.
Impotence means man's inability, and the impossibility to achieve his goals. If man stops
helpless in front of disease, death and loss and others, the most felt thing is his failure to
resist fate.
This study begins by talking about the concept of eternity, then scrutinizes the al-
Jahili poets' view to fate. It manifests the revelations of complaint from fate with the two
pictures of ruins and inability.
This study was conducted to examine the effect of storage period and fruit
wrapped of two local grapes varieties (Balady and Helwany) using polyethylene
bags of 50 μm thickness on some losses of grapes berry . the study estimated the
weight loss p
ercent, berry shatter, berry spoilage and the total losses for the
varieties as a function to storage period and packing of grapes berry. Results
showed that there is a high correlation between the storage period and the
weight loss, berry shatter, spoilage and the total losses of fruits, where this
action started after 3 weeks of the beginning of storage. The average percents of
weight loss after 100 days storage were 11.75 % and 8.43% for Balady and
Helwany respectively, the berry shatter percents were 6.20% and 5.52%
respectively for Balady and Helwany, the spoilage percents were 9.50% and
7.20% for Balady and Helwany respectively and the total losses for tow
varieties were 20.1% and 13.63% for Balady and Helwany respectively. The
previous values decreased clearly by using bags of polyethylene of 50 μm
thickness as follows: 9.47% and % 6.82 for weight losses, 3.10 % and 1.8% for
berry shatter, 7.20% and 3.51% for spoilage and the total losses 16% and
10.1% for Balady and Helwany respectively.
