Abstract

Vol. 3,Issue 1

Abstract

A preliminary study of the moths species in AL Ghyran park, Janzour city which located in (the west coast of Libya) this study was conducted from June 2020 to September 2020 in grassland created Habitats . A total of 7 species (Heliothis peltigera, Tetracis cachexiata, Sesamia nonagrioides, Pyrausta despicata, Agriphila inquinatella, Cornifrons ulceratalis and Acronicta aceris) were recorded belonging to 3 families, including to (Noctuidae, Geometridae and Crambidae). there three very common species were recorded (Pyrausta despicata, Heliothis peltigera and Sesamia nonagrioides). nonetheless, there was one species seen two time on restore grassland (Tetracis cachexiata).

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The aims of the study was to assess the degree of contaminations of the Tobruk gulf by measuring the concentrations of chemical parameters (pH, DO, BOD5, COD, TN and TP) and heavy metals concentrations (Fe, Zn, Mn, Cu, Ni, Co, Pb, Cd and Cr). Samples collections from seven locations along Tobruk bay. Average concentrations of chemical parameters and heavy metals were compared with the permissible limits of (WHO) 2011 World Health Organization. The results showed that the average concentrations of chemical parameters at all stations were higher than the permissible limits of WHO. However, the heavy metals concentrations fluctuate between some metals were higher than the permissible limits, such as Cr, Fe, Mn, Ni, Co, Pb and Cd and other metals as Zn and Cu exhibit lower contents. The study proved that Tobruk commercial port and Sewage discharge tube as one of the main sources cause polluted in Tobruk bay

Abstract

This study was conducted through spring 2020 to prove the ability of various most common leguminous herbs; Medicago polymorpha, Medicago minima and Ononis viscosa, to observe symbiotic relationship via N2-fixation by rhizobial bacteria. Rhizobium meliloti associating with M. polymorpha forming fan shaped nodules and M. minima forming finger-like shape nodules, their nodules were distributed on adventitious roots. While Rhizobium trifolii was associated with O. viscosa in rounded nodules attached to the tap root. Larger nodule number was in O. viscosa with average (19.3) nodules/root, while the least number was in M. polymorpha with an average (4.43) nodules/root, with regard to the nodule length, the longest was for M. minima with (2.99 cm), and the least length was for M. polymorpha with average (1.59 cm). Bacteroid forms resulted here were varied between bacterial species inside nodule cells. To test the nodule activity, sections of M. polymorpha nodules were in black color, and sections of M. minima nodule were in light brown color, while O. viscose nodule sections appear in pink color. This study proved the existence of two types of nodules (determinate and indeterminate); indeterminate nodules in M. polymorpha and M. minima elongated with apical meristem and containing different central tissues. Other type was determinate nodule in O. viscose lacking the existence of active meristem leading to spherical nodules containing a single, homogeneous central N2-fixation zone.

Abstract

A study was carried out to determine the effect of different concentrations of sucrose because of its great importance in supplying plants with their needs of carbon and energy.From this study it was shown that the extent of its effect on the efficiency of the construction process photosynthesis and the consequent increase in the content of starch and soluble proteins in the wheat plants. Furtrhermore, it was found that adding sucrose to the nutrient medium at a concentration of 15% had a very significant effect in improving the content of optical pigments from chlorophyll a (0.72 mg g-1 FW), chlorophyll b (0.56 mg g-1 FW) and carotenids (1.27 mg g-1 FW) . It had also a great effect on starch and protein content 147 mg g-1 FW and 118 mg g-1 FW respectively when measured in seedlings of wheat plants at the age of 21 days compared to the control.

Abstract

In this research , we studied the morphological and needle anatomical traits for six pine species : Pinus halepensis,P. brutia , P. pinea, P. nigra,P. canariensis and P. merkusii at different altitudes in EL-Jabal EL-Akhdar region east-Libya. The results indicated a significant means difference of some traits between species . P. canariensis was the longest needle and cone 28.53,14.11 cm, respectively. while P.merkusii was the shortest needle 5.9 cm and the smallest cone. P. brutia was distinguished by the shortest seed of 0.511 cm and the longest wing of 2.38 cm .P. Pinea was distinguished by the longest seed of 1.75 cm and the shortest wing of 0.5 cm and the cone width of 6.71 cm, and the needle diameter was larger than the other species 1.89 mm . On the other hand, the center of the needle for all coniferous species have two vascular bundles, and therefore these species are classified under the Diaploxylon section. These traits are importan for creating an identifying key for El-JabalEl-Akhdar conifers.

Abstract

This experiment conducted at the Faculty of Science - Misurata University, inside a greenhouse in December -2016. This study was aim to comparing different concentrations of sludge from Misurata wastewater treatment, its effect on Allium cepa, and comparing it with chemical fertilizer NPK. Sludge was ground and added to the soil at different concentrations (15, 30, 45 tons / ha) in plastic ponds size (57 x 37 x 15 cm) at three repetitions for each treatment. The result showed that, the sewage sludge treatment was approximately to pH (6.86) and heavy metals in the allowed limits them compared to the German and Syria standard specifications for sludge in agriculture. Addition the results of the morphological study was unsignificant differences in all treatments compared to the control, although the physiological properties of sugars and proteins showed a significant increase to treatment (45 tons / ha), as well as in chlorophyll A when the two treatments (15 and 30 tons / ha). However, Mineral elements (potassium, calcium, magnesium, iron, chromium and cadmium) were unsignificant differences, while Copper, zinc, lead and arsenic were significant decreased compared to control, However all treatments were in the allowable limits compared to the German and Syrian standard specifications

Abstract

The aim of this study way to measure the concentration of some heavy metals (Iron, copper, zinc, chromium, manganese, cobalt, lead, nickel) in five types of cigarettes (Marlboro, Rothmans, LM, Sports, Karela) in some of aden govemorate markets_ Sebha, at arate of three samples of each type, the Atomic Absorption Spectrophotometer technique was used to determine heavy metals. The results showed a significant increase in the concentration of heavy metals in types of cigarettes at probability of (P<0.01). The concentration of the heavy metals was (0.049, 0.037, 0.027, 0.04, 0.019, 0.083, 0.077 µg/g) respectively. while the results of the survey showed the highest percentage of smokers in the age group 45 ((28.9%) and the lowest in the 5-14 (0.02%) and children 5-14 (2%), and the highest percentage of smokers. Smoking years 1-9 years amounted to (47.7%), the number of cigarettes smoked per day was 9-10 cigarettes (47%), while the percentage of smokers for university education (55%), intermediate education (34.9%), illiterate (10.%). And the health implications recorded that the most common diseases in the studied sample were shortness of breath (10.1%), cough (6.3%), gingivitis (2%) and pneumonia (1.3%).

Abstract

Abu-Taraba Desalination Plant uses multi-effect evaporation technology, which has received great attention in the past few decades, and has also introduced steam pressure technology to produce water. The capacity of the station is approximately 40,000 cubic meters per day. This study aims to determine the quality and operational efficiency of produced water from 2017 to 2019. The physical and chemical parameters included (PH,) T (temperature), NTU turbidity, Taste, Odor, electrical conduction (Ec), Total dissolved salts TDS, (T.H) (total hardness), T-ALK as CaCO3, magnesium (Mg), (K) potassium., Fe, (Na) sodium, (K) potassium and (RC1) residual chlorine were used for assessment of water quality. At the same time, determined the operating efficiency, an equation is used, which depends on the actual water volume and the volume production in the "perfect" state from 2017 to 2019. The results showed the evidence for desalination plant's high efficiency in producing water with high specifications compared to the Libyan standard limits, guidelines for drinking, and WHO specifications. While, the average operating efficiency of Abu-Taraba Desalination Plant during 2017,2018 and 2019 were 42.6% ,21.6% and 13.38 % respectively. In fact, the operating efficiency ratio was very low in 2019. Therefore, it is necessary to make recommendations to support the technical requirements of Abu-Taraba Desalination Plant to carry out the necessary maintenance of the 82-83 production units to achieve the goals and meet the needs of Abu-Taraba Desalination Plant.