خيارات البحث
النتائج 911 - 920 من 1,443
EVALUATION OF PHYTOCHEMICAL COMPOUNDS IN Moringa oliefera Lam. EXTRACTS ON CYTOTOXICITY OF MCF-7 CELL LINE
2019
Marwa Abd El Alem | S. Ali | M. Sarwat | S. Hussein
Moringa olifera Lam. which called "Miracle tree" was an enormous usage of medical, nutritional and economic benefits so its leaves and roots extracts were vitro examined for phytochemicals contents, antioxidant, and cytotoxicity against MCF-7 cell line. Leaves and roots both extracts were estimate using 2,2-di phenyl-1-picryl hydrazyl (DPPH) radical scavenging assay and high performance liquid chromatography (HPLC) to determine phenolic and flavonoids compounds. The leaves aqueous and ethyl acetate extracts contained a significantly (p<0.05) more phenolic compounds than root extracts, while roots ethyl acetate extracts were significantly more active in DPPH assay comparing with aqueous extracts . However, the leaves aqueous extract and roots ethyl extracts were contained high values flavonoids compound but in case of phenolic compounds the aqueous roots ex tract recorded the greatest highest number followed by the leaves ethyl acetate extract. The ethyl acetate extractions for leaves and roots have a high inhibition percentage against breast adenocarcinoma MCF-7 cell line comparing with aqueous extracts.
اظهر المزيد [+] اقل [-]MANGEMENT OF TURF IRRIGATION SYSTEM UNDER USING GRAY WATER
2019
Shimaa Abd Elfattah | A. Abdel-Aziz | K. El-Bagoury
This research amid to obtain identify the effect of low-quality water (gray water) (reused water after its nomination in the special filtration stations) on the performance analysis of the turf irrigation system. The Experiment was carried out at ELRhap site, the area under investigation was 450 m², it was divided into 6 plots, and the geometrical has 5 m × 15 m. Investigated variables were gray water and tap water plots were; have been while the investigated parameter was the percentage of the applied amounts of irrigation water with a percent of 100%; 85%; 75%. The response of plant growth landscaping parameters due to irrigation water types were color, length, density and its coverage on the after heads, the effect of gray water and fresh water on the turf irrigation system was compared through the study of (uniformity, Surface roughness, Clogging ratio, flow, pressure), of sprinklers during same the irrigation period. Results of the applied could be summarized as followed. The Accumulative clogging ratio by using gray water was (1.50 – 1.56 – 1.6) % and tap water was (1.22 – 1.25 – 1.28) % at (100% - 85% - 75%) of quantity the water required for the plant. Illustrates in tap water turf quality rate was (8.50 – 8.00 – 8.00) for color, very good quality rate was (8.00 – 8.00 – 7.50) for density also very good ground cover quality rate was (8.00 – 7.50 -7.50). Meanwhile, illustrates in gray water turf quality rate was (8.50 – 8.50 – 8.00) for color, very good quality rate was (8.50 – 8.00 – 8.00) for density also very good ground cover quality rate was (8.00 – 8.00 – 7.50) at (100% - 85% - 75%) of quantity the water required for the plant. Surface roughness in the main irrigation lines was measured after the use of gray water and tap water. The erosion was (17.93– 65.35) Mm and the sediments were (15.48 – 58.22) Mm in gray while the erosion of tap water was (10.45– 34.89) Mm and the sediments were (9.06– 45.22) Mm.
اظهر المزيد [+] اقل [-]GENETIC PARAMETERS FOR GROWTH PERFORMANCE TRAITS OF EGYPTIAN BARKI LAMBS USING RANDOM REGRESSION MODEL
2019
Sh. Melak | H. Mansour | A. Aboul-Naga | Mona Osman | A. Elbeltagy | Manal El Sayed
Variance components and genetic parameters for growth traits were estimated for Barki lambs using the average information REMLF90 (AIREMLF90). A total of 3205 Barki lambs’ records over the period from 1984 to 2017 from experimental Borg Al-Arab station belonging to Animal Production Research Institute (APRI) were analyzed by fitting Random Regression Model (RRM) with Legendre polynomials (LPs) for body weight traits from birth up to 480 days. Gender, type of birth, year, season and age of dam were considered as fixed effects in addition to the fixed regression on Legendre polynomials, while random regression of additive genetic and permanent environmental effects were considered as random factors in the model. The results showed that all fixed factors and some interactions were significant for all studied traits (P<0.05). Quadratic equation was the best description for growth curve. Additive genetic and permanent environment variances ranged from 0.88 to 6.08 and from 0.88 to 15.33 for birth and thirteen months weights, respectively. Additive genetic and permanent environment covariances ranged from 0.05 to 16.06 and from 0.08 to 9.20 for birth with six months weights and for weaning with ten months weights, respectively. Direct and total heritabilities ranged from 0.05 to 0.41 and from 0.08 to 0.74 for four months and birth weights, respectively. Additive, genetic and phenotypic correlation coefficients were the lowest between birth weight with other studied traits and the highest between ten months weight with other studied traits. Phenotypic variances were oscillated between 2.27 for birth weight to 22.56 for seven months weight, while, residual variances were oscillated between 0.06 for birth weight to 14.05 for four months weight. Therefore, ten months of age recommended to be the best criterion for selecting Egyptian Barki lambs for meat production.
اظهر المزيد [+] اقل [-]BIOCHAR AS A STRATEGY TO ENHANCE GROWTH AND YIELD OF WHEAT PLANT EXPOSED TO DROUGHT CONDITIONS
2019
Wesam Mansour | B. Salim | S. Hussin S. | M. Abd El-Rassoul
Drought has become major environmental constraint to the crops productivity and the sustainability of agriculture. Recently, using biochar (BC) as a soil conditioner has aroused much interest and proved to be an effective tool for improving soil properties and crops growth and yield. Therefore, a pot trial was conducted using wheat plant (Triticum aestivum L.) with three water regimes (60, 30 and 15% of water holding capacity(WHC)) and three rates of biochar (0, 2%, and 5%) to investigate the impact of biochar on growth and yield components. The results showed that WHC enhanced in the presence of BC leading to improving the availability of water to wheat plants grown in BC-treated soil. Plants grown in BC-amended soil had higher growth and plant biomass, net assimilation rates than those in un-amended soil. Biochar addition positively affected wheat growth parameters including increases in leaf area, number of leaves per plant, tillers number per plant, height of plant as well as shoot to root fresh weight ratio. Particularly interesting is the improvements in yield attributes. These results led us to conclude that the application of black carbon would enhance the growth and yield of crops under insufficient water supply. On other hand, biochar can be considered an effective tool for sustainable agriculture and hence mitigating the injurious effects of drought conditions on plants.
اظهر المزيد [+] اقل [-]AN ASSESSMENT STUDY OF GROWTH PERFORMANCE AND GONADS DEVELOPMENT OF MONO SEX NILE TILAPIA IN DIFFERENT AGE STAGES DURING THE PRODUCTION PERIOD
2019
Sara El-Nahal | M. Amer | M. Osman | T. Ali
The objective of this study was to follow up the growth performance and gonads development of sex reversed male Nile tilapia. Fish fed commercial diet contained 30% crude protein at a rate of 3% of the biomass and 10 fish were randomly taken biweekly during the experimental period (16 weeks). Growth performance, feed utilization and survival rate were calculated. Histological examination of the gonads was done every two weeks to follow the growth and development of the gonads. Results showed positive interactions between growth parameters and reproductive development during different periods of fish productive cycle. Histological examination illustrated that during early ages, testicular sections of mono sex male’s tilapia had abnormal architecture with deterioration of germinative tissue. Despite abnormal testis texture, fish started spermatogenesis, a step toward puberty when their body weight reached 29.16g. As fish reached 4-5 months, male start to recover their testes normal structures and at age of 5.5-6 months, testicular sections appeared normally as pointed out by firmed testicular lobules, existence of all germ cell types and the intensively stored spermatozoa in testicular lumen and testicular ducts, confirming the full maturity of males. Based on the obtained results, it can clearly conclude that there is a relationship between age, body weight and development of sexual glands. It has also been shown that the hormonal treatment of tilapia seeds in the early stages for production of mono sex (all males) leads to a marked deterioration in the testes structure, continues near the fish enters the sexual maturity. At a later age, males can overcome this deterioration, restore the histological structure of the testes and achieve full sexual maturity at the age around from 5.5 to 6 months.
اظهر المزيد [+] اقل [-]EFFECT OF SOME AGRICULTURAL PRACTICES ON IMPROVING SALTS AFFECTED SANDY SOIL PRODUCTIVITY.
2019
Diia Boulos | Hoda Elia
A field experiment was conducted on sandy soil at Ismailia Governorate. The aim of the present study is to improve the productivity of salts affected sandy soil by treat it with different rates of bentonite, chicken manure and their combination. Soil application rates were bentonite (1, 2.5 and 5 %), chicken manure (5, 10 and 15 ton/fed) and their combination (2.5% bentonite with each of 5, 10 and 15 ton /fed chicken manure) were mixed in the upper soil layer (0-15 cm soil depth) and their effects on some soil physical properties and crop productivity of fennel plant (Foeniculum Vulgare Mill.) were investigated during the winter season of 2018. The results revealed that, all studied treatments were significantly decreased of soil bulk density compare to control. The applications of bentonite 1, 2.5 and 5% lead to, reduction of the value of soil bulk density by 4.17, 5.95 and 10.71%. In addition, the applications of chicken manure 5, 10 and 15 ton/fed, lead to reduction of the value of soil bulk density by 8.93, 11.31 and 14.88 %. Also, application of 2.5% bentonite combined with each of 5, 10 and 15 ton/fed chicken manure, lead to reduction of the value of soil bulk density by 11.31, 15.48 and 17.86% as compared with control, respectively. Data indicated also that there are an increase in the percentages of retained moisture in the soil at all treatments under study. Bentonite and chicken manure individually or combined being higher with increasing the applied rate of bentonite and/or chicken manure. Also the application rates of bentonite 1, 2.5 and 5% lead to, increasing the values of water-holding pores (WHP) with 6.87, 8.05 and 10.55%. In addition, WHP values increased to 9.21, 10.43 and 11.27% with the application of chicken manure 5, 10 and 15 ton/fed. Also, data refer that WHP increased to 12.03, 12.81 and 14.11% by application rate of 2.5% bentonite combined with each of 5, 10 and 15 ton/fed chicken manure, as compared with control, respectively. The values of water infiltration rates (cm/h), were affected by different soil applications and can be arranged in the following ascending order: 2.5% bentonite + 15 ton/fed chicken manure < 5% bentonite < 2.5% bentonite + 10 ton/fed chicken manure < 2.5% bentonite < 15 ton/fed chicken manure < 2.5% bentonite + 5 ton/fed chicken manure < 10 ton/fed chicken manure < 5 ton/fed chicken manure < 1% bentonite < control. The water use efficiency values, affected by different soil application can be arranged in the following descending order: 2.5% bentonite + 15 ton/fed chicken manure > 2.5% bentonite + 10 ton/fed chicken manure > 2.5% bentonite + 5 ton/fed chicken manure > 15 ton/fed chicken manure > 10 ton/fed chicken manure > 5 ton/fed chicken manure > 5% bentonite > 2.5% bentonite > 1% bentonite > control.
اظهر المزيد [+] اقل [-]Effect of chitosan and salicylic acid as exogenous elicitors on growth and biochemical constituents of broccoli seed sprouts
2019
Rasha Bondok | Ahmed Abdel-Hafez | Hany Metwally | Zeinab Abdeghany
The effect of chitosan and salicylic acid treatments to investigate the seedling growth parameters of Broccoli seed sprouts (Tiburon f1) cultivar was the aim of this study. Salicylic Acid and Chitosan are the )elicitors( that stimulate the sprout, which are divided into Biotic (biological origin), abiotic (chemical or physical origin) elicitors and phytohormones have been applied alone or in combinations, in hydroponic solutions or sprays, and in different selected time points of the sprout growth or during post-harvest. Cumulative time had been completed (harvest time) using tap water, chitosan at 25, 50,100 ppm and salicylic acid at 65,130,260 ppm for seed soaking and sprouting , then precooled and air-dried sprouts were randomly chosen from glass jar (replicate) to collect data of sprout length, hypocotyl length, radical length, dry weight and fresh weight. Also, Samples of harvested 3, 5 and 7 days old etiolated broccoli dried using air draft oven at 65.5C° then grounded into powder for chemical analysis while fresh sprouts and seeds were analyzed for total phenols. However treatment with chitosan at 100 ppm cleared that the moisture, protein, ash, fiber, calcium , potassium, and total phenols of sprouts were increased by 9.63%, 33.73%, 11.80, 11.67%, 336.50 ppm, 196.43 ppm and 66.51mg/100g, respectively. Treated sprouts with salicylic acid at 65 ppm concentrate were also induced an increments on the same constituents reached 9.53%, 33.40%, 11.63, 10.46%, 333.50 ppm, 190.60 ppm and 62.90mg/100g, respectively over control (untreated). Therefore, treated sprouts with chitosan or salicylic acid could be considered as useful tool for improving the growth characters and bioactive metabolites of Broccoli seed sprouts For their Production of anti-cancer materials, As well secondary metabolic pathways respond to specific treatments with elicitors would be the basis for to enhance the production of secondary metabolites, in order to produce quality and healthy fresh foods
اظهر المزيد [+] اقل [-]ULTRAVIOLET LIGHT EFFECTS ON PRODUCTIVE, PHYSIOLOGICAL PERFORMANCE AND IMMUNE RESPONSE OF TWO DEVELOPED LAYING HENS
2019
ahmed youssef | Ibrahum El-wardany | Magdy Hassan | Mohammed Shourrap
In this experiment, a total number of 165 birds (150 female + 15 male) from each developed laying hens Silver Montaza and Matrouh 20 weeks old up to 40 weeks of age. All bids were weighted and randomly distributed into five treatments with three replicates per treatment (10 females and 1 male / replicate) with almost similar initial average body weight. Feed and fresh water were ad libitum during the experimental period. Each experimental group was exposed to natural day light and supplemented with Ultraviolet light as in its program light, the first group (control group) exposed to no UV light, the second, third, fourth and fifth groups were exposed to 1, 2, 3 and 4 hours/day respectively to UV light from UV lamps after sunset, and controlled by a timer as following : 1- Hens in the first treatment were exposed to sun light and yellow lamps to 17h/day without exposed to UV lamps (Control). 2- Hens in the second treatment were exposed to sun light to sunset, UV lamps for 1h/day and supplemented with yellow lamps to the end of light period. 3- Hens in the third treatment were exposed to sun light to sunset, UV lamps for 2h/day and supplemented with yellow lamps to the end of light period. 4- Hens in the fourth treatment were exposed to sun light to sunset, UV lamps for 3h/day and supplemented with yellow lamps to the end of light period. 5- Hens in the fifth treatment were exposed to sun light to sunset and UV lamps for 4h/day without exposed to yellow lamps. Birds were reared under similar condition. The results indicated that live body weight (LBW), feed intake (FI), egg mass, some blood components, immune responses to sheep red blood cells and New castle were significantly improved (P≤0.05) by exposed birds to UV lamps after sunset supplemented in its program light. It could be concluded that the efficient exposed time to UV lamps was (2-3 hours/day) for silver Montaza and Matrouh developed laying hens.
اظهر المزيد [+] اقل [-]Studying Rain Water Catchment Potentialities in the Northwest Coast of Egypt Using Remote Sensing and Geographic Information System
2019
Asmaa Khater | Ayman Abouhadid | Usama Elbehairy | Mohamed Aboelghar | Abdelraouf Aly
Sustainable agricultural development of the desert areas of Egypt under the scarcity of irrigation water is a significant national challenge. Existing water harvesting techniques on the northwest coast of Egypt do not ensure the optimal use of rainfall for agricultural purposes. Basin-scale hydrology potentialities were studied to investigate how available annual rainfall could be used in agriculture irrigation to increase crop production. The present study includes data related to agricultural production in the form of geospatial layers including climate, soil, land covers unite and rain water catchment areas. Thematic classification of Sentinal-2 imagery was carried out to produce the land cover and crop maps following based on the (FAO) system of land cover classification. Contour lines and spot height points were used to create a digital elevation model (DEM). Then, DEM was used to delineate basins, sub-basins, and water outlet points using the Soil and Water Assessment Tool (Arc SWAT). Main soil mapping units of the study area identified from Land Master Plan maps it was(Very shallow gravelly and rocky soils and barren rock). Climatic data collected from the Central Laboratory for Climate. The results showed that the study area receives a significant amount of precipitation almost every three years, however, water harvesting methods are inappropriate to store water to be used in agricultural during drought seasons. The amount of precipitation(81.9 mm), surface water runoff(4.46 mm), potential evapotranspiration(70.5 mm), and actual evapotranspiration(7.10 mm) for the years (2004 to 2017) shown as results of (Arc SWAT). The land cover map showed that tree crops (olive and fig) cover 195.8 km2 when herbaceous crops (barley and wheat) cover 154 km2. The maximum elevation was 250 meters above sea level while the lowest one was -3 meters below sea level. The study area receives a massive variable amount of precipitation; however, water harvesting methods are inappropriate to store water for purposes.
اظهر المزيد [+] اقل [-]DETERMINANTS OF AGRICULTURAL INVESTMENT IN LIGHT OF CONTEMPORARY LOCAL VARIABLES
2019
Gomaa Abdel-Aziz | S. Makled | Eman Kadoss
Investment is one of the most important tools of the economic and social development plans in order to achieve its objectives. The success of development policies depends on several factors, including the volume of investments and the efficiency of their distribution in different fields. This requires that the investment plans and programs set in line with the state's ability to use these investments effectively. Agricultural investment is one of the basic means for the success of agricultural development as it is the main basis for increasing production as well as increasing income and creating more job opportunities and investment is a variable variable has an effective role in finding solutions to the problems of the economy sucking As well as absorbing a measure of manpower that is not working, thus contributing to reducing the problem of unemployment, and increasing the government agricultural investment, which opens the way for private investments in the form of productive projects that contribute to increase production and thus increase exports and reduce imports, thus improving the agricultural balance and increasing national and individual income. Which is reflected in the increase in savings, which in turn lead to the creation of new investments. It can be said that the strategy of agricultural development in Egypt aims to encourage and increase rates of investment growth, whether public investment owned by the state or private investment contributes to increase production And of improving the investment required for the projects of infrastructure and this leads to increased investment activities by adding new projects within the economic structure. The strategy of agricultural development in Egypt aims to encourage and increase the rates of investment growth whether it is a public investment owned by the state or other sectors that contribute to the productivity of the private sector and the infrastructure necessary for the production projects. This leads to increase the investment activities by adding new productive projects that diversify the production base Within the economic structure, despite the successive economic changes experienced by the Egyptian economy, there is still a slowdown in the advancement of government agricultural investments with a clear and significant decline in investments directed to Compared to agricultural sectors obeyed other than the impact is clearly on the performance of the agricultural sector and thus lower rates of agricultural development in Egypt. From the above, the total agricultural investment equation shows that this investment increased by 0.21%, 0.54%, 0.52% for each 1% increase in both agricultural and agricultural exports in the previous year and agricultural income in the previous year, respectively, while decreasing Total agricultural investment by about 0.91% and 0.23% for each increase in agricultural balance deficit and exchange rate by 1%. In other words, the most important variables affecting agricultural investment in a given year were the agricultural GDP of the previous year, the value of agricultural income, and agricultural exports. The statistical significance of this relationship was found at 0.05, and the significance of the model as a whole was found to be around 79% of the changes in the investment to the aforementioned factors.
اظهر المزيد [+] اقل [-]