This paper discuss the Laser induced breakdown
spectroscopy (LIBS) by using Nd:YAG which is a high energy
pulsed Laser . The laser radiation is focused on solid targets which
are samples of red Copper (99.5%). Most important Plasma
parameters which are electron temperature and density was
measured.
This paper presents a study to reduction of heavy crude oil viscosity by
heating, where we select the best of temperature for all types instead of
constant temperature, whatever composition and viscosity of crude oil.
This work presents the details of the construction of the temperature
control system in the center. We used the Atmega8 microcontroller
which has high performance speed and suitable memory.
Reaction temperature and space velocity are two of the most
important process variables in catalytic reforming. They affect both
the octane number of the reformate and its volumetric yield. The
present study has demonstrated that there is a defini
te relationship
between the reaction temperature and space velocity. The effect of
the change in space velocity became insignificant at a temperature
of 425ºC where space velocity does not seem to have an effect on
the volumetric yield at a temperature of 390ºC where all lines meet.
Equally, at a space velocity of 4.3 the temperature does not seem to
have an effect on the volumetric yield, and the effect of temperature
became insignificant at a space velocity of 4.6 .
The following research
aims to characterize the work of olive mills in the study area with an
attempt to offer some of the competitive advantages offered by these
mills. Most of the studied mills are modern mills and have an
individual investment
of an average age of 12 years, Which means
that this sector is managed by a group of persons with high expertise
may contribute to raising the performance of the work in the mill.
The research aims to study is to study the effect of the pH factor of Pterocladia
capillacea on agar yield and some of its physical properties using different degrees of pH
(4- 5.5 - 5.5 - 6.5 - 7.5 - 7.5 - 8). The maximum yield of agar was 37.45%
at pH = 5 and
562g / cm2 and viscosity 10.7cP and 15.45% at pH = 8 with the highest strength of 768 g
/cm2 and viscosity of cP 156. The degree of melting and melting of agar Between (22-
33.5 οC) and (75- 86 οC), respectively.
This research includes the study of energy emulsions used as an alternative fuel
in thermal power stations or in internal combustion engines, and the
mechanism of the formation of emulsions energy, and where the process of
cavitations bubbles form
ed in the fluid as a result of a high-speed spin rotation,
has been studied for the first time in Syria, a detailed study of the terms of the
stability of this type of energy emulsions (Fuel- water).
This article describes physical peculiarities of competitive phase that emerges
when drops of water-fuel emulsion are heated. It is shown that the process of
micro explosion indrops is determined by the amount of water contained in the
fuel and by disparity of emulsion.
This study was performed in order to determine the temperature
rise under human dentin discs of different thicknesses of primary teeth
during the light curing process with conventional halogen lamp and
LED.
The research aims to study the effect of Seasonal variations in yields and qualities
of agar seaweed Pterocladia capillacea. The results show that there is a clear impact of the
Seasonal variations in the yield, physical and chemical properties of
the extract agar.
Agar yields ranging from 10.1 to 33.8% and has been the highest in the month of June and
below 33.8% in December, 10.1% of the years 2014 to 2015. Reached the maximum value
of the strength of the gel in June, 789 g/cm2 and the minimum value of 183 g/cm2 through
December and the average rate of sulfates 3.42%. The viscosity values ranged between
35.7 and 81.4 cP, and recorded the highest value in July 81.4 cP. Melting temperature
ranged 78- 86.5 °C and Gelling temperature from 35 to 25 °C.
This work aimed to study the environmental factors influencing growth stopped of olive
leaf midge Dasineura oleae F. loew (Dipter: Cecidomyiidae) and its host
(Hymenoptera: Platygasteridae) Platygaster demades Walker, such as temperature and
reser
vation period. A series of experiments had been done to end this phenomena of
larvae by changing temperatures from suitable temperature at 20±1 °C accompanied
with different photoperiods 16 L: 8D and relative humidity of 75± 5% during 15, 30,
and 60 days, to low temperature at 7± 1 °C accompanied with complete darkness and
relative humidity of 75± 5% for 15 days. This had been done after 30, 60, 90 and 120
days of growth stopped.
