مجلة علوم البحار والتقنيات البيئية最新文献

{"title":"Feeding of European Pilchard, Sardina pilchardus (Walbaum, 1792) in Derna Coast, Eastern Libya","authors":"Ezalnhaser A. Farag Abziew","doi":"10.59743/jmset.v6i1.46","DOIUrl":"https://doi.org/10.59743/jmset.v6i1.46","url":null,"abstract":"A total of 700 specimens of Sardina pilchardus were collected monthly from the catch of trawling net and lampara fishery operating on the Derna coast on the Mediterranean Sea from August to July 2018. The feeding habits including the annual diet composition, monthly variations in the diet composition, and the variations of the diet with length, and the intensity of feeding were studied. Sardinella pilchardus feed on a wide variety of prey types: copepods (37.9%), cladocerans (22.0%), polychaete larvae (17.0%), dinoflagellates (14.1%), diatoms (5.2%), and crustaceans eggs (3.9%). Copepods and cladocerans were the major food item all year round (59.9%) and it was found in all length groups. In the present study copepods, cladocerans, polychaeta larvae, and crustacean eggs increased as the size increased while diatoms and dinoflagellates decreased as the fish size increased. The feeding intensity was quite high during the autumn (72.9%), summer (74.7%), and spring (60.7%).","PeriodicalId":106154,"journal":{"name":"مجلة علوم البحار والتقنيات البيئية","volume":"442 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2020-06-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121908365","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Waste Water Treatment from Petrochemical Industries: The Concept and Current Technologies-A review","authors":"Abdullah. A. Elamari, A. Alshebani, Mohamed A. M. Saad","doi":"10.59743/jmset.v6i1.49","DOIUrl":"https://doi.org/10.59743/jmset.v6i1.49","url":null,"abstract":"Increasing consumption of oil in modern society has led to more oil refinery waste generation. The wastewater from these industries mainly contains oil, organic matter, and other compounds that need to be well managed before they can be discharged to any receiving waters. The treatment of this wastewater can be carried out by physical, biological, and chemical treatment processes. Treatment of petroleum wastewater has two stages, firstly, the pre-treatment stage reduces grease, oil, and suspended materials. Secondly, an advanced treatment stage is to degrade and decrease the pollutants to acceptable discharge values. The current review summarizes studies and investigations carried out for the treatment of petroleum industries and refineries.","PeriodicalId":106154,"journal":{"name":"مجلة علوم البحار والتقنيات البيئية","volume":"10 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2020-06-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122640175","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Some Aspects of The biology of Black Spot Sea Bream, Pagellus bogaraveo (Brunnich, 1768) in Umm al-Rizam Coast, Eastern Libya","authors":"Ezalnhaser A. Farag Abziew","doi":"10.59743/jmset.v6i1.48","DOIUrl":"https://doi.org/10.59743/jmset.v6i1.48","url":null,"abstract":"Monthly samples of 600 specimens of Pagellus bogaraveo were collected from artisanal fishing on Umm al Rizam coast, eastern Libya in 2019. Total length ranged from 16.5 to 38.4 cm with average total weight ranging from 68.5-401.8 g. The length–weight relationship for all individuals was described by the following parameters: α= 0.008 and b= 3.0993. There were monthly variations in the sex ratio between males (245 fish= 40.8% (and females (355 fish= 59.2%). The overall sex ratio was 1:1.45 in favor of females. Pagellus bogaraveo feed on a wide variety of prey types: bony fish (41.2%), mollusks (22.9%), crustaceans (20.1%), polychaetes (7.5%), algae (4.4%), and echinoderms (3.9%). The feeding intensity was quite high during the summer (82.5%) and autumn (68.0%). ","PeriodicalId":106154,"journal":{"name":"مجلة علوم البحار والتقنيات البيئية","volume":"158 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2020-06-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116114956","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Effect of Different Brands of Ceftriaxone on Various Strains of Bacteria by Measuring Zone of Inhibition","authors":"Ibrahim Egfair, Ryad M. Alati, Abdullah Bakoosh, A. A. Alfalos","doi":"10.59743/jmset.v6i1.51","DOIUrl":"https://doi.org/10.59743/jmset.v6i1.51","url":null,"abstract":"In this study, the antibiotic ceftriaxone from three different brands was tested for its effectiveness against strains of bacteria like Streptococcus pyrogens, Staphylococcus aerus, and Klebsiella pneumonia. The effectiveness was estimated by measuring the zone of inhibition and compared with a standard disc (BD BBLSensi-Disc 2004/09) from an American company-general lab. The diameters of the inhibitory zones from all the brands were found to be well within the range of 20 to 33 mm ±0.5.","PeriodicalId":106154,"journal":{"name":"مجلة علوم البحار والتقنيات البيئية","volume":"760 ","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2020-06-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"133819269","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"تقييم تأثير بعض المستخلصات النباتية على البكتيريا المعزولة من بيئة المطابخ","authors":"أسماء محمد عبدالرحمن, امنة خير صابر, عبد السلام محمد المثناني","doi":"10.59743/jmset.v6i1.53","DOIUrl":"https://doi.org/10.59743/jmset.v6i1.53","url":null,"abstract":"تعتبر النباتات الراقية مصدراً للمنتجات الطبيعية المضادة للميكروبات، تتواجد الميكروبات في بيئات مختلفة منها البيئات الداخلية للمنازل بما في ذلك المطابخ، لذا هدفت هذه الدراسة إلى التخلص من التلوث الميكروبي في المطابخ باستخدام المستخلصات المائية للقرنفل والريحان والكافور وعصير الليمون ومقارنة كفاءتها بالمنظفات الكيميائية من الكلوروكس والكلور والخل وسائل غسل الاواني. أظهرت نتائج هذه الدراسة أن جميع عينات البكتيريا المعزولة من المطابخ موجبة لصبغة الجرام تتمثل في بكتيريا  Staphylococcus وMicrococcus وLactococcus، ووجد أن أكثر المستخلصات النباتية تأثيرا عليها هو عصير الليمون، الذي وجد أكثر كفاءة من القرنفل بمقدار الضعف لقطر منطقة التثبيط على بكتيريا Staphylococcus وبمقدار 69% على بكتيريا Lactococcus في التراكيز الأصلية. كذلك ظهر من خلال النتائج أن أكثر المنظفات كفاءة سائل غسيل الأواني بنسبة 42% أعلى من الكلور في منع نمو بكتيريا Lactococcus، وبنسبة 70% من الكلور و55% من الخل في منع نمو بكتيريا Micrococcus في التراكيز الأصلية، بينما تفوق الخل في منع نمو بكتيريا Staphylococcus بقطر منطقة تثبيط اعلى من سائل غسيل الأواني بنسبة 23% والكلور بنسبة 17%. ولم تؤثر المستخلصات النباتية للكافور والريحان ومنظف الكلوروكس بجميع التراكيز على البكتيريا قيد الدراسة، وكانت بكتيريا Micrococcus أكثر مقاومة للمستخلصات النباتية وأكثر تأثرا بالمنظفات الكيميائية.","PeriodicalId":106154,"journal":{"name":"مجلة علوم البحار والتقنيات البيئية","volume":"11 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2020-06-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126358129","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"قياس تطور بعض المؤشرات الاقتصادية المتعلقة بالموارد السمكية في ليبيا","authors":"مسعودة عبد الرحيم أبوعروشة, خيرية عبدالحميد اسحيب, عبد السلام عبد الحفيظ الصلاي","doi":"10.59743/jmset.v6i1.50","DOIUrl":"https://doi.org/10.59743/jmset.v6i1.50","url":null,"abstract":"تعتبر تنمية الانتاج السمكي أحد المحاور الأساسية للتنمية الزراعية اللازمة لمواجهة تزايد الفجوة الغذائية وعلى الرغم من توافر موارد اقتصادية وطبيعية مهمة في ليبيا إلا أن الطاقة الإنتاجية لا تتناسب مع تلك الموارد، مما أدى إلى عدم الوفاء باحتياجات الاستهلاك المحلي وانخفاض نسبة الاكتفاء الذاتي رغم أن عدد السكان في ليبيا لا يتجاوز الـــــ6 مليون نسمة. استهدفت الدراسة تحليل الاتجاه العام لتطور بعض المؤشرات الاقتصادية المتعلقة بإنتاج واستهلاك الأسماك بالإضافة إلى الواردات والصادرات السمكية وقياس الفجوة الغذائية والاكتفاء الذاتي، ايضا تحديد فترات كفاية الانتاج وتغطية الواردات للاستهلاك المحلي بالاعتماد على سلسلة زمنية (1981-2013) مقسمة إلى فترتين. بينت نتائج الدراسة أن هناك اتجاها عاما متزايدا في الإنتاج والاستهلاك خلال فترات الدراسة، ولكن الطاقة الانتاجية من الأسماك لا تكفي الاحتياجات السنوية حيث بلغ متوسط فترة كفاية الإنتاج للاستهلاك اليومي خلال مدة الدراسة 222 يوم ورغم أن معدلات الاكتفاء الذاتي تتزايد بشكل عام ولكنها لم تصل إلى الاكتفاء الكامل أو تحقيق فائض إلا في 3 سنوات فقط طول مدة الدراسة، كما أن متوسط فترة تغطية الواردات للاستهلاك المحلي لم تزد عن 108 يوم. اكتفت الدراسة الحالية بتقدير العلاقة بين الإنتاج كمتغير تابع (Y) والاستهلاك كمتغير مستقل (X)، قد ثبتت معنوية العلاقة في نموذج الانحدار البسيط وبلغ معامل التحديد  0.562 و0.633 و0.612 لإجمالي الفترة و الفترة الأولي والثانية على التوالي، بما يعكس استجابة الإنتاج بمعدل مقبول للتغير في حجم الاستهلاك، وأن الاستهلاك يفسر نسبة كبيرة من التغير في حجم الإنتاج، أما فيما يخص العوامل المحددة لاستهلاك الأسماك، افترض الباحثون استنادا إلى الفروض والدراسات السابقة ومدى توفر البيانات في هذا المجال، ثلاث متغيرات مستقلة متمثلة في الواردات والدخل وعدد السكان، وقد تم استخدامها في تقدير معادلات الانحدار المتعدد في صورها المختلفة الخطية واللوغاريتمية المزدوجة والقطع الناقص، وقد أظهرت المحاولات عدم وجود أي صورة منها قد مثلت العلاقة في صورتها  المتعددة نظرا لوجود ارتباط قوي نوعا ما بين المتغيرات المستقلة  الممثلة لعدد السكان والدخل الأمر الذي يؤدي إلى ظهور مشكلة الازدواج الخطي، وكذلك مشكلة الارتباط الذاتي. وقد تم محاولة معالجة المشاكل بمختلف الطرق وإعادة التقدير باستخدام طريقة stepwise حيث استبعدت جميع المتغيرات ماعدا المتغير الذي يمثل عدد السكان. بلغ معامل التحديد 0.709 و0.425 و0.298 لإجمالي الفترة والفترات الأولى والثانية على التوالي بما يعكس استجابة الاستهلاك بمعدل مقبول للتغير في عدد السكان لإجمالي الفترة، وأنه يفسر نسبة كبيرة من التغير في الاستهلاك، باعتباره عاملا مهما لزيادة الطلب على الأسماك في السوق المحلي.","PeriodicalId":106154,"journal":{"name":"مجلة علوم البحار والتقنيات البيئية","volume":"300 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2020-06-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122162888","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"التأثير المضاد لنبات الفلزلز (Hyoscyamus muticus L.)","authors":"عبد الحميد الزربي, محمد الدراوي العائب, عيادة فرج علي, نصار رمضان عمر","doi":"10.59743/jmset.v5i2.69","DOIUrl":"https://doi.org/10.59743/jmset.v5i2.69","url":null,"abstract":"أجريت هذه الدارسة في المختبر بقسم النبات بكلية الآداب والعلوم توكرة جامعة بنغازي بهدف التعرف على التأثير المضاد (Allelopathy) للمستخلص المائي لنبات Hyoscyamus muticus L.. عند تركيزات 0.5 ،5، 50% لكل من الأوراق والأزهار والثمار على إنبات بذور و تطور البادرات في نبات الفجل (Raphanus sativus L.). حيث أظهرت النتائج حدوث تباين في تأثيرات المضادة بين المستخلص على إنبات البذور وتطور البادرات، مبينة أن التركيزات من الأوراق والأزهار والثمار لها تأثير على خفض نسبة الإنبات ونمو الجذير، وخصوصاً عند تركيز 50% حيث كان الإنبات منخفضاً جداً وأحياناً لا يوجد إنبات، بينما كان تأثير التركيز 5% متوسط، في حين أن التركيز 0.5 % كان له تأثير إيجابي على إنبات البذور. كما أظهرت النتائج أن مستخلص الأوراق كان له أعلى تأثيراً مقارنة بتأثير مستخلص الأزهار والثمار.","PeriodicalId":106154,"journal":{"name":"مجلة علوم البحار والتقنيات البيئية","volume":"17 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-12-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129345763","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Benefits and Limitations of Rhizobium-Legume Symbiosis and Nitrogen Fixation Under Libyan Saline Soil: Mini Review","authors":"Mustafa E. Elsharif","doi":"10.59743/jmset.v5i2.57","DOIUrl":"https://doi.org/10.59743/jmset.v5i2.57","url":null,"abstract":"Biological Nitrogen Fixation (BNF) donates to productivity both straight by increasing the production of legumes and indirectly by improving soil fertility. BNF is the cheapest and most environment-friendly procedure in which nitrogen-fixing bacteria (Rhizobia), interact with leguminous plants. Rhizobium is the most well-known species of the rhizobial group that acts as the primary symbiotic fixer of nitrogen, increased farming of legumes is important for the renewal of nutrient-deficient soils and providing required nutrients which important as food for human beings and animals. Some environmental factors such as salinity, which is become one of the severe difficulties in worldwide farming production. Where soil salinity limits the production of both feed and grain legumes.","PeriodicalId":106154,"journal":{"name":"مجلة علوم البحار والتقنيات البيئية","volume":"31 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-12-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121289144","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Finite Element Analysis of Free Energy Permanent Magnet Motor Using Solidworks and Finite Element Method Magnetics (FEMM) Software","authors":"Talal A. Elmasri, Mabrooka A. Elmasri, Esra S. Abdulhafid","doi":"10.59743/jmset.v5i2.58","DOIUrl":"https://doi.org/10.59743/jmset.v5i2.58","url":null,"abstract":"These days, our environment is getting worse, and the emission of gas from non-renewable energy sources such as fossil fuel and coal is the main reason for the current environmental issue. Therefore, the development of new energy sources which is clean and non-polluted to the environment is getting more demand in our world today. Free energy sources such as magnet energy are adaptable in replacing non-renewable energy sources. A permanent magnetic generator is a free-energy instrument that gives off entirely free energy by using the energy stored in permanent magnets. Much research has been done in this area, but none of which precisely focused on the tradeoff of magnetic material in this application. Although plenty of different magnetic materials have been synthesized including nanomagnetic ones, it is not easy to select an optimal magnetic material for a certain technological application due to their properties confliction. In this study, a new design of free energy permanent magnet generator has been developed and significant simulations are being done by using Solidworks and Finite Element Method Magnetics (FEMM) software for simulation modeling in order to tradeoff among magnetic materials in terms of performance. Results show NdFeB 52 MGOe which are very strong magnets made from alloys of rare-earth elements offer an optimum performance of around 11,309.734 J per motor cell and 8 magnets of 28,696.92 size in mm3 for a disk of radius 20cm; however, they are so expensive and in limited supply. Alternatively, strong nanomagnetic materials have been synthesized to replace rare-earth-based magnets in different applications.","PeriodicalId":106154,"journal":{"name":"مجلة علوم البحار والتقنيات البيئية","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-12-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130962342","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Laboratory and Statistical Methods for Estimating Soil Erosion on Al-Jabal Alkhdar Slopes","authors":"M. Aburas, A. Habel, Asama S. Alferjani","doi":"10.59743/jmset.v5i2.54","DOIUrl":"https://doi.org/10.59743/jmset.v5i2.54","url":null,"abstract":"The study applied some dynamic laboratory methods to estimate soil susceptibility to water erosion. Non-dynamic laboratory methods such as statistical methods were also applied. Tests were carried out on topsoil samples (0-10 cm) collected from five sites located on the semi-arid southern slopes of Al-Jabal Alkhdar: Meseliba (Taknes); Marawa; Sirat Alia (Gandulah), Grehat (Gandulah), and Qasar Mestashi (Salantah). The results showed compatibility between the results of all the dynamic methods, which showed that the soil of Qasar Mestashi is the most susceptible to erosion, which corresponds to the deterioration of its physical and hydraulic properties and the low content of organic matter. It was also found that the soil of the Sirat Alia area was the least erosive, which corresponds to the high content of clay, organic matter, and soil water-stable aggregates. On the other hand, the statistical method using the K-USLE nomograph (diagram) did not succeed in producing results consistent with the dynamic laboratory methods, the K-USLE nomograph results unexpectedly showed that the soil of Grehat is relatively the most susceptible to erosion, although these soils have a good content of clay, organic matter, and soil water-stable aggregates. The high content of silt at Grehat soils could be the reason for the high susceptibility estimation when the statistical method is applied. Accordingly, the variance in the results of statistical methods is expected due to the slight changes in the soil fractions, which raises doubts about the efficiency of statistical methods in providing a reliable characterization of soil susceptibility to water erosion. Dynamic laboratory methods were the closest to soil characteristics and field conditions, which could make them more realistic and reliable indicators as low-cost and easy-to-apply methods, and contribute to more efficient erosion measurement at Al-Jabal Alkhdar region.","PeriodicalId":106154,"journal":{"name":"مجلة علوم البحار والتقنيات البيئية","volume":"103 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-12-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115375486","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}