Refine search
Results 601-610 of 1,443
THE EFFECT OF CROSSING BOUSCAT WITH GABALI RABBITS ON BODY WEIGHT AND CARCASS TRAITS
2018
A. El-Domyati | A. Gad | M. Mahrous | H. Soliman
Data on rabbits produced from a total number of 518 parities were analyzed to evaluate crossing effects among two breeds of rabbits. The breeds tested were Gabali (GAB) and Bouscat (B). sex effects on post weaning body weight were also studied. A total number of 80 rabbits at marketing age were slaughtered to evaluate effects of mating type and sex on some carcass traits. Mating type affected significantly (P ≤ 0.001) progeny weight from weaning up to marketing age and preslaughter, carcass, slaughter weight, hot carcass weight, fore legs weight and hind legs weight at marketing age. Meanwhile, the effects were not significant on loin weight and dressing percentages . Sex insignificantly affected body weight although body weights of female rabbits were slightly heavier than those of male rabbits. Effects of sex on carcass traits were not significant. Heterosis % and superiority % of body weight estimates were positive for all post weaning weights. Positive heterosis was shown for some carcass traits.
Show more [+] Less [-]EFFECTS OF NANO CARBON AND NITROGEN FERTILIZATION ON GROWTH, LEAF MINERAL CONTENT, YIELD AND FRUIT QUALITY OF FLAME SEEDLESS GRAPE
2018
Rasha Abdel-Hak | S. El-Shazly | A. El-Gazzar | E. Shaaban
This investigation was carried out through two successive seasons (2014 and 2015) to investigate the effects of nano-carbon and nitrogen fertilization levels on growth, leaf mineral content, yield and fruit quality of 3 years old flame seedless grapevines, cultivated in a private orchard with loamy soil texture, at Gharbiya Governorate. Ten treatments were applied as a randomized complete block design with three replications. The result indicated that 80%N from recommended requirment+0.6% carbon nano tubes (CNTs) increased significantly leaf area, fresh and dry weight, total carbohydrate% and concentration of N, P, K, Mg, and Fe in leaves, weight of 100 berries, and juice weight of 100 berries compared with control. Also results showed that yield of combined application of 80% conventional fertilizer of nitrogen and nano-carbon at 0.6%was equal to that with supplied 100% conventional fertilizer (control). This indicated that the utilization rate of nitrogen fertilizer was increased after combined application of nano-carbon, which can save the N fertilizer amounts in production practice.
Show more [+] Less [-]SILICON BEHAVIOR IN SOILS CONTAINED DIFFERENT SILICON AND PHOSPHORUS CONCENTRATIONS USING ADSORPTION MODELS [
2018
Heba Morsy | A. El-Leboudi | Wafaa El-Etr | Shaimaa Abd-Elrahman
Silicon (Si) is an element, not essential, but is beneficial for some plants. The Freundlich model was used to describe Si adsorption on soil samples incubated with different Si and phosphorus (P) concentrations. Soil incubated samples were: T1 soil had no Si or P (control); T2, T3 and T4 soils contained 50, 100, and 200 mg Si L-1, respectively. T5 and T6 soils contained 50 mg Si L-1 in combined with either 7 or 10 mg P L-1 along with T7 and T8 soil contained 100 mg Si L-1 in combined with either 7 or 10 mg P L-1. In final, T9 and T10 soil contained 200 mg Si L-1 in combined with either 7 or 10 mg P L-1. A series of adsorption experiments were performed using sodium metasilicate pentahydrate (Na2O3Si.5H2O) solution prepared to have concentrations representing 0, 14, 28, 42 and 56 mg Si L-1. The supernatant of Si concentration was determined. The amount of element adsorbed was calculated as the difference between applied element concentrations and that remaining in solution after equilibration. Adsorption isotherms were determined at room temperature (25 oC±1). Results revealed that a positive trend was generally found; increases in amount of adsorption onto soil with increasing Si concentration and equilibrium concentration in concerned solution either applied separately or applied + initial available Si concentration in soil. The Freundlich equation provides a good fit to the sorption data for all incubated soil samples and R2 values were ranged from 0.82 to 0.97. Present study indicated that adsorption capacity value (Kf) decreased from T1 to T3 soil samples then increased at T4 sample, and intensity adsorption values (1/n) gave almost an opposite trend to that of capacity adsorption (Kf) values. Moreover, adsorption of Si onto soil incubated with different Si concentrations in combined with P2 decreased as compared to P1. Opposite trend was obtained with equilibrium Si concentration in concerned solution. Also, present study showed that the higher values of Kf obtained in P1 soils (T5, T7 and T9), compared to Kf values of P2 soils (T6, T8 and T10), and intensity adsorption values (1/n) gave almost an opposite trend to that of capacity adsorption (Kf) in both P1 and P2 soils. Finally, large Si sorption capacity and low Si affinity for the surface sites were observed in soil incubated with high Si concentration compared to soil incubated with low ones.
Show more [+] Less [-]PHYTOTOXICITY AND EFFECTIVENESS OF SOME HERBICIDES IN WHEAT PLANTATIONS
2018
Hoda Elattar | S. Dahroug | W. El-Sayed | Rensa Hashiesh
Weeds are severely competition with wheat crop and it highly reduces crop yield. So, the present study was conducted on wheat cultivations during two seasons 2013/2014 and 2014/2015 to evaluated phytotoxicity effects of some herbicides on wheat (Triticum aestivum). Effectiveness of these herbicides on weed control in wheat crop and yield evaluation and quality of wheat was evaluated as well after treatment by herbicides. The field experiment was carried out in agricultural experimental station of Etay El-barod, El-Beheira Governorate, using randomized complete block design (RCBD) with four replicates for each treatment and unweeded check, having two rates of both herbicide recommended and double recommended rates (R, 2R). Treatments comprised of post-emergence application of pyroxsulam, flumetsulam+ florasulam, tribenuron-methyl, diclofop-methyl and tralkoxydim. The results indicated an increase in wheat plant height with all herbicides used compared to unweeded check. Tribenuron-methyl and flumetsulam + florasulam treatments did not cause any visible phytotoxicity, while pyroxsulam, diclofop-methyl and tralkoxydim treatments recorded a low indexes of phytotoxicity on wheat plants which disappeared completely after 8 weeks from post application, compared to unweeded check. Results also, indicated that all herbicide treatments decreased weed density. Herbicide treatments achieved the highest weed control expressed in lowest fresh weight after 56 days from application for broadleaved, grassy and total weeds. Herbicide treatments caused an excellent increase in yield attributes (spike length, biological and grain yield) and yield quality (weight of 1000 grains, total carbohydrates and crude protein) compared to unweeded check in both seasons. The maximum grain yield was recorded at two trials by pyroxsulam compared to unweeded check.
Show more [+] Less [-]ROLE OF LOCAL DEVELOPMENT FUND FOR ECONOMIC EMPOWERMENT OF RURAL WOMEN: CASE STUDY IN "TAHLA”, BANHA DISTRICT, QALUBIA GOVERNORATE
2018
Ayat Mohamed | M. Yehia | Jacinthe Rihan | Zeinb Abd-Elrahman
The resent study aims to identify the role of Local Development Fund (LDF), affiliated to the Ministry of Local Development in economic empowerment of rural women, to determine most important factors affecting the level of economic empowerment. Furthermore to identify the economic, social and health obstacles facing rural women. A study was conducted in "Tahla village", Banha district in Qalubia governorate. A random sample was selected including150 rural women from the beneficiaries’ of the Local Development Fund loans. A questionnaire was used during personal interviews with the rural women from July to August 2017. The data was tabulated and analyzed by using several statistical methods such as: range, arithmetic mean, standard division, correlation coeffi cient, and stepwise regression model using SPSS program. The study results indicated that the economic empowerment indicator ranges between (43) - (29) with Arithmetic mean (36.8), standard deviation (3.36). The indicator range was divided into 3 equal categories. The results also showed that (44.7%) from the total population sample fell in the medium category of the indicator. The high category included (36.7%), and the lowest category included (18.7%) from the total sample population. The data analysis using the Multi Regression coefficient was statistically significant at the forth step were the value of “F” calculated was (12.94) at the level of significance 0.01. The Determination coefficient was (0.284) which means that only four variables from the total of the independent variables explains (28.4%) of the total variance in the economic empowerment in the study sample which are as follows: household condition, husband age, respondent age, and woman social recognition in her society.
Show more [+] Less [-]POPULATION FLUCTUATIONS OF IMMATURE STAGES OF THE CITRUS FLOWER MOTH, PRAYS CITRI MILL. (LEP.: HYPONOMEUTIDAE) ON LIME TREES
2018
A.F., Badr | A.M. Hekal | L.A. Youssef
Mill. on lime flower buds showed six annual population peaks of 13.3, 1.2, 1.8, 6.2, 2.8 and 3.4 in mid-May, mid-Oct., mid-Nov., mid-Dec., midFeb. and mid-Mar., respectively during 2015/2016 season. Five peaks of 13.5, 14.5, 1.8, 5.8 and 5.0 immature stages were observed on flowers in midApr., mid-June, mid-Oct., mid-Dec. and mid-Mar., respectively. On newly formed fruits, five peaks of 7.3, 0.4, 2.2, 1.8 and 2.4 immature stages were also recorded in the middle of June, Oct., Dec., Feb. and Mar., respectively. The general mean was the highest (11.3 immature stages) in June, while it was the lowest (0.0 immature stage) in Sep. The highest population density of P. citri was recorded in spring, followed by summer then winter and autumn. The seasonal mean was 4.1 immature stages in 2015/2016 season. The same trend could be applied during 2016/2017 season. Six peaks of 12.8, 2.5, 4.0, 5.8, 3.3 and 4.6 immature stages were estimated on lime flower buds in mid-May, mid-Oct., mid-Nov., mid-Dec., mid-Feb. and mid-Mar., respectively. Mean numbers of P. citri immature stages on flowers also exhibited six peaks of 14.5, 2.8, 5.3, 7.2, 4.3 and 5.6 in mid-Apr., mid-Oct., mid-Nov., midDec., mid-Feb. and mid-Mar., respectively. Six peaks of 5.8, 1.0, 1.8, 3.0, 1.5 and 2.4 immature stages were also found on newly formed fruits in the middle of May, Oct., Nov., Dec., Feb. and Mar., respectively. The highest general mean was 10.8 immature stages in May, while the lowest was 0.0 immature stage in Sep. The highest population density of P. citri occurred in spring, followed by summer then winter and autumn. The seasonal mean was 4.6 immature stages in the second season.
Show more [+] Less [-]EVALUATION OF WHEAT FLOUR BLENDED WITH DIFFERENT RATIOS OF MORINGA OLEIFERA LEAVES AND SEEDS
2018
A.R., Khalaf | M.H., El-kalyoubi | M.F. Khallaf | A.S. Hussein | I.F. Helmy
Chemical composition, minerals content, amino acids, fiber fractions, fatty acids profile, total phenols, total flavonoids and antioxidant activity were determined in wheat flour (WF) 72%, moringa leaves powder (MLP), defatted moringa seeds powder (DMSP) and moringa seeds (MS). Pasting profile and rheological properties of blends supplemented with MLP at levels of 3, 6, 9 and 12% or DMSP at levels of 5, 10, 15 and 20% were also studied. The highest moisture and carbohydrate contents were found in WF (12.60 and 85.05%), respectively. MLP had higher ash and fiber contents (8.87 and 7.91%), respectively, while, protein and fat contents were higher in DMSP and in MS. Mineral content (Ca, K, Mg, P, Na and Fe) in MLP was the highest, while DMSP was higher in Zn content than that of other samples. Fiber fractions of WF were lower than that of both MLP and DMSP. Total essential amino acids of DMSP was higher (19.25%) than that of MLP and WF (12.45 and 4.16%), respectively. Oleic acid was the predominant fatty acid (66.85%) in moringa seeds oil. MLP had the highest value of total phenolic, total flavonoid and antioxidant activity (11.97, 8.02 and 15.87 mg/g), respectively. Color measurements showed that all of MLP, DMSP and WF blends decreased in L*, a*,however, they increased in b*, saturation, hue and ∆E values. Supplementation with MLP and DMSP at all levels decreased the peak viscosity, trough, breakdown, final and setback viscosities. While, it increased water absorption, dough development time, mixing tolerance index and dough weakening. On contrary, arrival time and dough stability were decreased. Also, MLP and DMSP decreased the extensibility, resistance to extension, maximum resistance to extension energy of dough and the proportional number.
Show more [+] Less [-]EVALUATING EFFECT OF PEPPER MINT OIL (Mentha pipreta) AND ITS NANO-FORMULATIONS ON SOME ENZYMATIC ACTIVITIES AND BIONOMICS OF COTTON LEAF WORM Spodoptera littoralis (BOISD.) [
2018
Dalia A. Yousef | A.E. Bayoumi | Nadia Z. Dimetry | A.H. Amin | E.M. Hoballah
Different formulations of pepper mint oil, i.e. bulk, nano-emulsion and nano-encapsulation were evaluated against 2nd and 4th instar larvae of the cotton leafworm Spodoptera littoralis (Boisd.). Their effects on enzymatic activities and bionomics were also investigated. Transmission Electron Microscopy (TEM) showed that the mean particle size of the prepared nano-emulsion ranged between 20-90nm. The encapsulation efficiency and loaded capacity percentages exhibited that distilled H2O was more suitable than ethanol in preparation of nano-encapsulation particles. Bioassay treatments showed LC50's on 2nd instars larvae were 70.59, 12.23 and 21.72 ppm for pepper mint oil, pepper mint nano-emulsion and loaded nanoemulsion, respectively. While on 4th instars these values were 80.47, 26.14 and 67.69 ppm, respectively. LC90's on 2nd instars were 104.75, 33.97 and 30.14 for pepper mint oil, pepper mint nanoemulsion and loaded nano-emulsion, respectively. While on 4th instars these values were 177.66, 71.37 and 102.29 ppm. Toxicity index and relative potency proved that nano-emulsion was more effective than loaded nano-emulsion, while the bulk preparation was the least effective one. Results of enzymatic activities showed marked effects of the three formulations of mint oil, significant inhibitions were recorded for amylase, invertase, trehalase, protease and alkaline phosphatase, while significant increase in activities of cuticle phenoloxidase and chitinase. Effects of adding the three formulations to artificial diet of 2nd instar showed significant effects of the insect bionomics. Larvae durations, percentage mortalities, were increased as well as larval malformations. Also, pupal duration, percentage pupal mortality and pupal malformation were increased, while pupal weight was decreased. Adults longevity showed insignificant effects, while female fecundity and egg % fertility showed significant responce.
Show more [+] Less [-]GENETIC EFFECT OF MIGRATORY COMPOUNDS FROM BOTTLED NATURAL DRINKING WATER STORED UNDER DIRECT SUNLIGHT
2018
H.M., Fahim | Neima, K. Alsonosy | M.F. Khallaf | Y.A. Abdeldaim | Hemat E. Elsheshetawy
The drinking water is one of the important routes for human exposure to contaminants through releasing of antimony (Sb) and polymers from polyethylene terephthalate (PET) plastic. The aim of this study was to investigate the effect of sunlight on chemical compounds migration into PET-bottled water and studying the cytotoxicity of di-butyl phthalate (DBP) and di-octyl phthalate (DOP) by SMART in Drosophila melanogaster. Four random water bottle samples produced by various companies as: A (PET, clear, 0.6L), B (PET, clear, 1.5L), C (PET, blue, 1.5L) and D (polycarbonate PC, blue, 19L) for studying the effect of direct sunlight exposure on migration of antimony and phthalates. Experiment was carried out in the presence of sunlight (7 h daily) for 210 day. The migrated compounds profile (µg/L) that detected sample (A) before storage were only two compounds formaldehyde (FA) and acetaldehyde (AA) out of nine compounds. During storage under sunlight, four compounds (Sb), bis-phenol A (BPA), dimethyl phthalate (DMP) and diethyl phthalate (DEP) were increased till 30th day then did not affect till the end of storage. Other detected compounds were continuously progressed till the end of storage with different rates. The highest rate was appeared in case of FA, it was 222 fold followed by DOP compound (173 fold) as well as DBP (75.3 fold) and finally the AA compound with 17.9 fold. Regarding to another sample B, only 3 compounds (BPA, DMP and DBP) were not detected at zero time. The AA compound was detected with the highest concentration (0.9µg/L) and the lowest one was DOP (0.007µg/L). Only four compounds were detected before storage named Sb, DOP, FA and AA, the lowest level (0.006µg/L) was noticed in DOP, while the moderate level was recorded in FA (0.03µg/L) and Sb (0.08µg/L). Other detected compounds; i.e. DBP, DOP, AA and FA were consequently increased with higher levels. This study investigated genotoxic effects of (DBP) and (DOP) at 30µg/ml concentration using the somatic mutation and recombination test (SMART). The cytotoxicity of the tested phthalate compounds was also assessed at five different concentrations 0.5, 1, 5, 10 and 20µg/ml in two types of human cell lines; liver cancer (HepG2), colon cancer (HCT-116) using neutral red cytotoxicity assay. All of tested compounds significantly showed high levels of tumor induction and frequency compared to the negative control in SMART assay. It was also reduced the viability of the HepG2 cell lines cells using different concentrations and the highest cytotoxic effect. While, on HCT-116 showed no cytotoxic effect.
Show more [+] Less [-]AN ECONOMIC STUDY OF GEOGRAPHIC DISPARITIES OF FOOD PRICES AND INFLATION IN EGYPT
2018
M.O. Abd El-Fatah
With the full recognition that the problem of inflation in Egypt is due mainly to factors related to the recent economic policy, while others are related to structural reasons, that ignited the flames of inflation led by monopolies prevailing in the commodity market. The problem is the rise in food and drink prices (FCPI) in particular. The problem is further compounded by the increase in poverty in Egypt, which rose to 31.8% in October 2017. The most serious is the increase of extreme poverty rate of 5.8% of the population is mainly due to rising food prices. The research is concerned with the analysis of general price index and the food price index in four regions, namely, rural upper Egypt, urban upper Egypt, rural lower Egypt, and urban lower Egypt. The research compare between the evolution of consumer price indices in two period, the first period cover, 22 months before the adoption of the floating exchange rate policy and second period cover 15 months after the adoption from November 2016 of the new policy and it. The main of the research are summarized in the following points: 1- Increase the general index of prices and number. 2- A marked increase in the indices in the geographical areas in the countryside from the urban during two periods. 3- There is a significant effect of the time component on the increase in the price index during two periods of study, which was more evident in the float period. 4- The food price index had a clear effect on the increase in the general price index in the regions. 5- The conditions of the increase in the monthly inflation rates in the pre-flotation period in the Egyptian geographical regions, although there was a decrease in the floating period over time, in the floating period. 6- High urban inflation rates for rural areas, despite their rise.
Show more [+] Less [-]