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Register a new userContribution to Recovery the Antimicrobial Properties of Some Syrian Marine Algae
مساهمة في الكشف عن الخصائص الصادة للميكروبات لدى بعض الطحالب البحرية السورية
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Damascus University ورقة بحثية
Publication date
1997
fields
Biology
and research's language is
العربية
Created by
Shamra Editor
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يعد هذا البحث الأول من سلسلة أبحاث نقوم بإجرائها بهدف إجراء مسح للطحالب البحرية السورية المهمة طبيًا من خلال الكشف عن خواصها الصادة للميكروبات مخبريًا و ذلك لتقدير قيمتها الطبية. و قد تم في هذا البحث اختبار الخلاصات اللبيدية و المائية ل ١٦ نوعًا طحلبيًا على مجموعة من الميكروبات اشتملت على جراثيم إيجابية الغرام و سلبيته بالإضافة إلى نوع فطري واحد. و قد تبين بشكل عام أن الخلاصات اللبيدية هي الأكثر فعالية في هذا الصدد و بخاصة في حالة الجراثيم إيجابية الغرام، أما الخلاصات المائية فكانت معدومة الفعالية تقريبًا. كما أجرينا مقارنة لتأثير الخلاصات اللبيدية العائدة للأنواع الطحلبية نفسها الموجودة في مناطق أخرى من البحر الأبيض المتوسط.
We screening for antimicrobial substances production from marine algae of Syria. We presented results of ١٦ algal species tested by their lipide and aqueous extracts agaimst Gram’s negative and positive bacteria, as well as one fungous species. The lipide not aqueous extracts were the active against Gram’s positive bacteria especially. No effect founded on the fongous species. In addition we make comparative viewing with other studies on other mediterranean contries regarding the same species of algae tested.
References used
ميهوب. حامد ١٩٨٩ . طحلب أسمر من البحر الأحمر يجتاح الشواطئ السورية. مجلة جامعة دمشق.
ميهوب. حامد وعباس. آصف ١٩٩٢ مساهمة في دراسة النباتات البحرية القاعية على شاطئ اللاذقية أطروحة ماجستير كلية العلوم جامعة تشرين.
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The aim of this study is to highlight the potential use of marine algae as well as polypropylene for the removal of crude oil from surface seawater.
The determination of optimal sorption time and sorption capacity of the materials in oil/water bath
and oil bath without water in presence of three oils of different viscosity were investigated. The capacity of oil removal from seawater was related to structure and surface properties as well as oil amount and oil properties especially, its viscosity.
The results revealed that the extension of absorption time does not influence absorption capacity of the examined sorbents in presence of both oils of low and middle viscosity (LV and MV). Nevertheless, the sorption capacity was increased by extending the absorption time to 30 min. For high viscose oil (HV). The sorption capabilities of Enteromorpha exceeded those observed for all of the other algae, while polypropylene fiber showed the highest capacity. Overall, the sorption capacity of the studied sorbents increased with increasing oil viscosity. The absorption capacities of studied materials in the oil bath and oil/water bath were comparable.
The results suggested that substitution of synthetic oil sorbents used in Syria by marine algae is possible in oil removal, which have relatively high sorption capacity.
The study focused in this research to determine the trace of some heavy metal
elements (Copper Cu, Cadmium Cd, Lead Pb) in some types of marine macroalgae
scattered on the shore of the city of Banias during 2014, using atomic absorption
spectrosco
py (technology flame Flame- AAS).
The results indicate that the concentrationsofeach of Copper, Cadmium and Lead
have a link with macroalgae types, sampling sites from direction, and Source of pollution
on the other hand; it was observed that the accumulation of heavy metals in both of
Sargassum vulgare (browen algae) and Enteromorpha linza (green algae) was more than
red algae.
Copper concentration ranged between 1.291 ppm and 11.716 ppm in the studied
species, Reaching the highest value in the Enteromorpha linzaalgae and the lowest in
Sargassum vulgarealgae, the highest value of Lead element was (59.354 ppm) in
Enteromorpha linzaand the lowest value of it was (6.46 ppm) in Ulva fasciata, While the
highest values of the element Cadmium recorded (10.457 ppm) in Enteromorpha linza and
the lowest (0.666 ppm) in Ulva fasciata.
Since the beginning of the twentieth century, researchers have isolated and
dentified spreaded and adapted yeasts to variow environmental conditions and
the types of the mediums in which they graw. The industrial features of the
isolated genera, e
specially those used in the food processing and the stability of
their genetic characteristics were studied. Yeasts in medical and industrial
fields were also improved.
In This study it has been uses a network for monitoring the pollution with organochlorine pesticides in There marine stations at Lattakia coast: Fishing port, AfamiaCoast, High Institute Of Marine Research Coastusing Cages contained species of musse
lswitch are filter feeders Brachidontes varibilis. Samples had been collected from Lattakia coast.
The results showed a great efficiency of the made network for monitoring the organic pollution in marine environment. It has been recorded a concentration of DDTs is accumulated lower than 2ng/g , Endosulfane and HCB is lower than 1 ng/g too. The results showed that the HCH compounds is dominant in all stations.organochlorine pesticides is accumulated mostly in the biota of station Fishing port, Afamia Coast
foamed concrete is a concrete made by cement slurry mixed with foaming agent, so
that foamed concrete is lighter than conventional concrete. The objectives of this study is
to produce this kind of concrete, and to study some of its physical and mec
hanical
properties. Mix design of concrete was made for four required densities (1000,
1300,1600,1900 kg/m3), cement content of 350 kg/ m3, and water to cement ratio equal to
0.5. Different tests were performed to determine some properties of product concrete such
as density, compressive strength and splitting tensile strength. The results demonstrated the
possibility of production foamed concrete with wide range of density and strength. The
oven dry density of foamed concrete was in the range of (870-1773 kg/m3) , compressive
strength was in the range of (2.95-16.2 Mpa ), and the splitting strength was in the range
of (0.32-1.76Mpa).
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