Metallic Contamination of Water and Sediments of “Hillil River” (North-West of Algeria) Near Wild Dump Site

Recent Advances in Environmental Science from the Euro-Mediterranean and Surrounding Regions - Advances in Science, Technology & Innovation ◽

10.1007/978-3-319-70548-4_399 ◽

2018 ◽

pp. 1367-1368

Author(s):

Ouiza Ould Ali ◽

Florence Vouvé ◽

Fatiha Abdelmalek ◽

Dominic Aubert ◽

Régis Rouillon ◽

...

Keyword(s):

Dump Site ◽

North West ◽

Metallic Contamination

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Evaluation De L’impact De La Pollution Agricole Sur La Qualite Des Eaux Souterraines De La Nappe Du Gharb

European Scientific Journal ESJ ◽

10.19044/esj.2016.v12n11p509 ◽

2016 ◽

Vol 12 (11) ◽

pp. 509 ◽

Cited By ~ 3

Author(s):

Bouderka Nouzha ◽

Souid Ahmed Kacem ◽

Lakhili Ferdaouss ◽

Lahrach Abrerrahim ◽

Benabdelhadi Mohammed

Keyword(s):

Underground Water ◽

Sodium Potassium ◽

North West ◽

Underground Waters ◽

The North ◽

Physico Chemical ◽

Eaux Souterraines ◽

The Impact ◽

Metallic Contamination

The Gharb plain is located in the North West of Morocco and corresponds to a vast plain of the Sebou watershed. It includes an irrigable perimeter of a 250,000 ha, of which more than 120,000 ha are designed as big hydraulics to meet the drinking water and irrigation needs of the region. The intensification of agriculture in this region leads to a significant use of phytosanitary products, which can impact the physico-chemical quality of the Gharb groundwater. To assess this quality we proceeded to the analysis of the physico-chemical parameters (pH, electric conductivity, dissolved oxygen, chlorides, sodium, potassium, nitrates, ammonium, and orthophosphates) and the study of the metallic contamination of waters of 17 wells located in the region of Sidi Kacem-Sidi Slimane. The results of performed analysis, revealed a pollution of an agricultural origin. This is confirmed by the maximum levels of chlorides, which exceed 2,734 mg/l, thereby explaining the high conductivity levels (5000 μ/cm). Nevertheless, a lithological influence cannot be excluded. The nitrate levels (160 mg/l) indicate a nitric pollution of underground waters. The heavy metals measured showed a metallic contamination exceeding the norms of lead and aluminium concentration, elements which may have their origin in fertilizers undergoing an excessive use in the area. These results confirm the impact of the agricultural intensification in the degradation of the quality of the underground water of the Gharb region.

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Electron Microscopic Examination of a Transplantable Rat Mammary Carcinoma

Proceedings, annual meeting, Electron Microscopy Society of America ◽

10.1017/s0424820100099842 ◽

1968 ◽

Vol 26 ◽

pp. 20-21

Author(s):

S. Shirahama ◽

G. C. Engle ◽

R. M. Dutcher

Keyword(s):

Electron Microscope ◽

Osmium Tetroxide ◽

Electron Microscopic Examination ◽

Undifferentiated Carcinoma ◽

Uranyl Acetate ◽

Sprague Dawley ◽

Electron Microscopic ◽

North West ◽

X Irradiation ◽

Tissue Specimens

A transplantable carcinoma was established in North West Sprague Dawley (NWSD) rats by use of X-irradiation by Engle and Spencer. The tumor was passaged through 63 generations over a period of 32 months. The original tumor, an adenocarcinoma, changed into an undifferentiated carcinoma following the 19th transplant. The tumor grew well in NWSD rats of either sex at various ages. It was invariably fatal, causing death of the host within 15 to 35 days following transplantation.Tumor, thymus, spleen, and plasma from 7 rats receiving transplants of tumor at 3 to 9 weeks of age were examined with an electron microscope at intervals of 8, 15, 22 and 30 days after transplantation. Four normal control rats of the same age were also examined. The tissues were fixed in glutaraldehyde, postfixed in osmium tetroxide and embedded in Epon. The plasma was separated from heparanized blood and processed as previously described for the tissue specimens. Sections were stained with uranyl acetate followed by lead citrate and examined with an RCA EMU-3G electron microscope.

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SEM and TEM observations of sperm development in the testis of the freshwater fish Oreochromis mossambicus

Proceedings, annual meeting, Electron Microscopy Society of America ◽

10.1017/s0424820100157838 ◽

1990 ◽

Vol 48 (3) ◽

pp. 58-59

Author(s):

Daryl A. Cornish ◽

George L. Smit

Keyword(s):

Morphological Characteristics ◽

Oreochromis Mossambicus ◽

Breeding Cycle ◽

Limited Information ◽

North West ◽

The North ◽

Sem And Tem ◽

Sperm Development ◽

Ultrastructural Characteristics ◽

The University

Oreochromis mossambicus is currently receiving much attention as a candidater species for aquaculture programs within Southern Africa. This has stimulated interest in its breeding cycle as well as the morphological characteristics of the gonads. Limited information is available on SEM and TEM observations of the male gonads. It is known that the testis of O. mossambicus is a paired, intra-abdominal structure of the lobular type, although further details of its characteristics are not known. Current investigations have shown that spermatids reach full maturity some two months after the female becomes gravid. Throughout the year, the testes contain spermatids at various stages of development although spermiogenesis appears to be maximal during November when spawning occurs. This paper describes the morphological and ultrastructural characteristics of the testes and spermatids.Specimens of this fish were collected at Syferkuil Dam, 8 km north- west of the University of the North over a twelve month period, sacrificed and the testes excised.

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