The present study was designed to evaluate the use of Spirulina, Arthrospir platensis as a protein source for hybrid red tilapia fries (Oreochromis niloticus x Oreochromis mossambicus) with average weights 206±11 mg.Spirulina incorporated into diets at 0, 50, 75, and 100% fishmeal-based diet.The test were fed fish 12% body weight three times day consecutive 65 days 24±2°C.The final gain, specific growth rate, feed conversion ratio (FCR) survival rate evaluated.The suggests that up 75%...

Two routes green and chemical were used to synthesize zinc oxide nanoparticles (ZnO NPs).Gelidium pulchellum extract was as a bioreducing agent in this work.The formation of ZnO NPs evaluated by Fourier transform infrared analysis with signals at 441 428 cm -1 for chemically synthesized NPs, respectively.ZnO exhibiting hexagonal cubic mixed phases observed from the transmission electron microscopy X-ray diffraction an average particle size 17 nm 22 chemical.ZnO showed considerable...

Lake Burullus is the second largest lake in Egypt and a Ramsar site located north of Nile Delta. The connected to Mediterranean Sea through inlet River Brimbal Canal. receives large amount agricultural drainage water (about 97% its balance), which affects quality. national plan, launched 2017, aimed improve condition, quality, fish production Burullus. current study provides an effective protocol monitor quality post first phase plan. Aglydopting proposed would enable researchers managers...

Abstract Based on weekly sampling, the present short-term study was set out over a one-year cycle in Eastern Harbor (Alexandria, Egypt). This aims to assess water quality monitoring data. Among 13 indexes used define harbor, 6 depend physical and chemical variables, other are biological criteria. Chlorophyll concentrations phytoplankton cell numbers were also as indicators for assessing trophic status. The indicated that status mesotrophic poor-bad classes major trend but oligotrophic...

Heavy metals contamination of water is a serious and complex environmental problem due to rapid industrialization, bioaccumulation non-degradability. Therefore, the reuse agricultural waste in process purifying from pollutants an attractive promising method. Almost inexpensive materials are used purify water, thus achieving desired economic goal. In this study banana peel (BP) was before after modification by 0.1M sulphuric acid (H2SO4) enhance removal Zinc Zn(II), Lead Pb(II) Nickel Ni(II)....

Despite macroalgae epiphytes play an important role in algal habitats, available information from Alexandria coastal waters is scarce. To evaluate the of environmental factors on inventory ephyphytic Ostreopsis c.f ovata cells, its abundance thalli 14 different collected two sites at Abou Qir rocky area was done basis sampling carried out for one year. The annual maximum cf. cell observed May (late-spring), reaching green Ulva linza July (mid- summer). Analysis variance showed significant...

The study estimates temporal and regional variations of nitrogen protein content the green algae Ulva fasciata red Corallina officinalis collected at three sites different entities along Alexandria coast. heterogeneity in environmental conditions contributes significantly on variation algal contents. However, varied storage by cannot be directly linked to ambient dissolved inorganic concentrations. can accumulate higher concentrations than officinalis. suggests a new nitrogen-protein...

This investigation was carried out during two successive seasons of 2004 and 2005 to study the effect fertilization by using types organic manures, i.e. cattle or town refuse at different levels (50, 75 100%) from its recommended dose with without biofertilizers mixture, microbien phosphoren in combination 50% mineralized NPK on growth, chemical composition as well yield quality Grand Nain banana plants comparison only fertilized 100% dose.The best results obtained that inoculated manure...

The present study investigated the potential allelopathic effects of living green marine macroalga Ulva fasciata growth several microalgae. Skeletonema costatum (Bacillariophyta, centric diatom), Nitzschia longissima (pennate Scrippsiella trochoidea & Alexandrium minutum (Dinophyta), and Heterosigma akashiwo (Raphidophyta) all being previously identified as bloom forming species in Alexandria coastal water, Egypt. results showed reduction microalgal a result treatment with fresh thalli...

N OZHA lake (South of Alexandria City, Egypt), an artificial freshwater basin, receives its water supply from the Nile River and surrounded urban area, which affect ecological balance.Results during a year cycle (December 2017 to November 2018) revealed scums dispersive blooms Microcystis aeruginosa Kützing (Cyanophyta) Botryococcus braunii (Chlorophyta), in no particular season, under wide range environmental conditions.Microcystis was persistent form whole period, culminating visible...

The presented laboratory experiment was designed to characterize the quantity and compositional variation of algal extracellular amino acids (AAs) that may represent an alternative nutrient source in a natural environment. To resemble bloom scenarios, analyses were conducted mono- and/or co-cultures bloom-forming species Skeletonema costatum, Scrippsiella trochoidea, Ulva fasciata, Corallina officinalis during their active growth phase. study revealed S. costatum exhibited higher production...

On 31 December 2018 at 10:36:34 UTC shallow earthquake of ML=4.3 took place 25 Km east Cairo and in the vicinity under-construction new Capital city Egypt (Fig.1). The event was interesting as it felt with intensity IV up to 50 epicentral distance relatively small magnitude Mw=3.8. focal mechanism showed Normal faulting a slight component strike-slip movement which is good agreement tectonic regime area estimated source parameters are found be intraplate earthquakes. These results could...

The current study was conducted during the summer seasons of 2018 and 2019 under net house conditions at Eastern Experimental Station Faculty Agriculture, Cairo University to investigate effect some cucurbit rootstocks on growth, quality, yield chemical compositions cucumber drought stress. included 12 treatments that were arranged in a split-plot design with three replicates. main plot two levels water irrigation (50 or100%) sub five viz., 1-Bottle Gourd (Legenaria siceraria), 2-Luffa...