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Register a new userStudy the effect of agar extraction temperature on its yield and physical properties of sea Syrian alga Pterocladia capillacea
دراسة تأثير درجة حرارة استخلاص الآغار في مردوده وصفاته من الطحلب البحري السوري Pterocladia capillacea
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يهدف البحث إلى دراسة تأثير عامل حرارة استخلاص الآغار ( 80-90-100-110 و 120) من الطحلب الاحمر Pterocladia capillacea في مردود الآغار و بعض خصائصه الفيزيائية.
The research aims to study the effect of of agar extraction temperature (80-90- 100-110 and 120) Syrian alga Pterocladia capillacea on its yield and and some physical properties.
References used
ALAWI, A, A., AL-MARHUBI, I, M., AL-BELUSHI, M, S, M., SOUSSI, B. 2010- Characterization of Carra --geenan Extracted from Hypnea bryoides in Oman, Marine Biotechnology, Volume, 13 , 893-899
ARAKI, C, 1966- Some recent studies on the polysacch arides of agarophytes. Proc. Int. Seaweed Symp, 5, 3–19
ARMISEN, R, 1995- World-wide use and importance of Gracilaria. Journal of Applied Phycology, 7, 231–243
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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.
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.
Seasonal changes effect on yield and quality of carrageenan from the Syrian
marine alga Hypnea musciformis were studied during 1 year. The carrageenan
yield varied from 31 to 46%. The maximum yield was recorded between April
and September, while l
ow carrageenant content was recorded in December.
The gel strength of carrageenan was maximum in September (260 g/cm²) and
minimum in March (90 g/cm²). The viscosity ranged from 22 to 44cP with a
peak recorded in September. Seasonal variations were not observed in the
gelling (42-50 C°) and melting (60-70 C°) temperatures of carrageenan. The
results indicate that Hypnea musciformis can be considered a good sources for
production of commercial carrageenan in future.
This research includes designing and executing of an applied model for converting
the energy of the offshore sea waves into electrical power. The model runs according to
oscillating water column system (OWC) using air turbine, which rotates by the
air pressure
generated by the sea waves within the energy chamber.
The article studies the effect of technological changes on the efficiency of the model
and subsequently the number of its turbine's rotation, within the wave parameters under the
Syrian coast conditions. Results in form of clear curves and diagrams will be discussed.
They will also be analyzed and considered to achieve a suitable suggestion that can
improve the system in the future.
This research aims to decrease the cost of last production stages
through decreasing the cost of potential casing repair by avoiding the
problems that casing string may be exposed to. Such problems are
caused by the temperature effect of salt dril
ling fluids as well as other
fluids normally existed in the annular behind casing at the nonecemented
intervals.
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