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Register a new userStudying the Nature of Recent Marine Sediments on the Accumulation of Cadmium and Lead in Latakia and Baniyas Shore
دراسة تأثير طبيعة الرسوبيات البحرية الحديثة في تراكم عنصري الكادميوم والرصاص في شاطئ مدينة اللاذقية وبانياس
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Tishreen University مقالة
Publication date
2024
fields
Geology
and research's language is
العربية
Created by
Shamra Editor
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يتناول هذا البحث تحديد نزر بعض العناصر المعدنية الثقيلة (الرصاص (Pb)، والكادميوم(Cd)) في أنواع مختلفة من الرسوبيات البحرية الشاطئية الحديثة ودراسة الفرز الحبيبي في مناطق مختلفة لشاطئ مدينتي اللاذقية وبانياس في صيف 2022 باستخدام تقانة مطيافية الامتصاص الذري (AAS: Atomic Absorption Spectrometry). وتحديد علاقة الارتباط بين تراكيز العناصر المدروسة وبين نوعية وطبيعة الرسوبيات وتأثير القطر الحبيبي في تغير هذه التراكيز.
This research based on the determination of some traceheavy metals(Lead (Pb), cadmium (Cd)), in different types of recent marine sediments and studying their grained isolation along different zones of Latakia and Baniyas shore area during summer period of 2022 using (Atomic Absorption Spectrometry: AAS).
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This research focuses on identifying the concentration of some heavy metal elements (Lead (Pb) cadmium (Cd)) in different types of marine sediments dispersed along Tratous coastal area using the Atomic Absorption (Atomic Absorption Spectrophotomete
r: AAS). The samples were collected from regions differ from each other in terms of geographical location and nature of the pollutants.
دراسة التنوع الحيوي لطحالب الفوقسيات Fucophyceae وتحديد الكتلة الحيوية والتركيب البيوكيميائي لبعض الأنواع ذات الأهمية الاقتصادية والطبية على شاطئ اللاذقية
This study was carried out on /516/ fish individuals of Chub Mackerel Scomber
japonicus (Houttuyn, 1782), which were caught from the Coastal water of Latakia
province (Levantine basin) from December 2014 to November 2015, to identify the
evolution
stages of sexual maturity (by morphological and histological methods)
and determine the spawning period of this important economic species. The results
showed that Scomber japonicus begin with sexual maturity from the beginning of
February and extend until mid-May, with a single peak in Mars. The average value
of the gonado-somatic index (GSI) was (12.46 ± 1.52)% for males and (13.21 ± 3.9)% for
female in Mars. And the total body length at sexual maturity was (21.5) cm for
males, and was (23.5) cm for females. The development stages and gonad maturation
in this specie, are similar with regard to the tissue and the form of gonads and
according to the six gonad maturation steps.
The aim of study was to determine the dates of breeding and sexual maturity for
Marsupenaeus japonicus in Lattakia coast as introduce for hatching and culturing it.
The specimens were collected from the sea water of Ibn-Hany area at the north of
L
attakia, during the period November 2010 to October 2011 once or twice monthly. In
vitro study included distinguishes males and females, morphometric measurements and
weights for all individuals. The genital maturity stage was determined externally and
through histological sections.
The biochemical composition of some species of Phaeophyceae (Cystoseira):
Cystoseira compressa, Cystoseira barbata, Cystoseira elegans, Cystoseira amentacea,
Cystoseira barbatula, Cystoseira caespitosa, have been studied. The algal specimens have
been collected from Ibn Hani coast north of lattakia in spring 2014. The soluble sugar
varies between (13- 56.78%) weight/dry weight [w/dw]. C.amentacea has the highest
content of proteins (21.76%), and C.barbata has the lowest (9.51%). Lipid varied between
(1.25- 5.55%) [w/dw]. The highest content of ash was in C.caespitosa (31.18%), and the
lowest in C.amentacea (23.84%). Iodine was: C.compressa and C.caespitosa (0.68 %),
C.barbata (0.69 %), C.barbatula (0.7%), C.amentacea (0.71%), C.elegans (0.8%).
Mannitol was within the range (2.91-4%) [w/dw]. Results of biochemical composition of
studied species showed the differences between the percentage of values, and this variety
affects on the economical value for the species, also affects on the major herbivorous food,
that affects on their environment and their community composition.
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