Affiner votre recherche
Résultats 111-120 de 190
EFFECT OF FOLIAR APPLICATION OF ANTIOXIDANTS ON VEGETATIVE GROWTH AND LEAF MINERAL CONTENT OF CHINESE TANGERINE YOUNG TREES BUDDED ON SOME CITRUS ROOTSTOCKS GROWN UNDER SALINE CONDITIONS
2018
I. Zaky | N. Abdel Hamid | H. El-Wakeel
Wady El Natroun high way (Beer Hooker Area) in a private orchard in a sandy soil under drip irrigation system with saline water. in 2015 and 2016 seasons. Chinese tangerine (Citrus tangerine) transplant were budded on three rootstocks namely sour orange (Citrus aurantum, mion), volkamer lemon (Citrus volkameriana, Tem) and X639 hybrid between (Cleopatra mandarin × Ponicurus trifoliata) grown under saline conditions to study the effect of foliar application of antioxidants namely ascorbic and salicylic acid on vegetative growth and leaf mineral contents. Results showed that, Volkamer lemon rootstock surpassed sour orange and x639 rootstocks under saline conditions, the highest incremental percentage young tree height, stem diameter, number of leaves per shoot and leaf area were registered by Chinese tangarine scion budded on Volkamer lemon rootstock. Among selected antioxidants ascorbic acid at the concentrations of 800 ppm recorded the highest significant values for vegetative growth parameters and surpassed salicylic acid. Also Chinese mandarin scion budded on volkamer lemon accumulated the highest concentrations of nitrogen (N), phosphorus(P), magnesium(Mg), and chloride (Cl-) and the lowest concentration of sodium (Na+). Chinese mandarin scion budded on sour orange rootstock accumulated the highest concentrations of potassium (K) while Chinese tangerine scion budded on x639 accumulated the highest concentrations of sodium (Na).
Afficher plus [+] Moins [-]EVALUATION OF CANOLA BIODIESEL PURIFICATION FOR ITS USING AS A SUBSTITUTE FOR DIESEL FUEL IN RURAL COMMUNITIES
2018
M. El-Wehishy | M. Mostafa | A. Moussa | M. El-Nono
The aim of this study was biodiesel purification with different methods beyond water by using different materials was used for this purpose. A large amount of biodiesel was produced from canola oil as source of oil therefore methanol alcohol had been added with potassium hydroxide (KOH) as catalyst. After 8 hours, biodiesel was separated from glycerol where glycerol was under the biodiesel using gravity. To purify biodiesel from remains of glycerol, water and alcohol, some materials filled two filters. Materials were rice husk grind, bagasse grind, saw dust, magnesium silicate and water. The results showed that the water, methanol and glycerol contents were 0.04, 0.01 and 0.23% respectively with using grind bagasse, but they were 0.2, 0.03 and 0.24% respectively with using water in purification process. So the bagasse grind was better than other materials in purification process of canola biodiesel.
Afficher plus [+] Moins [-]HYPOGLYCEMIC AND HYPOLIPIDEMIC EFFECTS OF SPIRULINA PLATENSIS, PHYCOCYANIN, PHYCOCYANOPEPTIDE AND PHYCOCYANOBILIN ON MALE DIABETIC RATS
2018
El-Sayed El-Sayed | M. Hikal | B. Abo El- Khair | R. El-Ghobashy | A. El-Assar
This study aimed to evaluate hypoglycemic and hypolipidemic activities of Spirulina Platensis and its bioactive components (phycocyanin (PC), phycocyanopeptide (PCP) and phycocyanobilin (PCB)) on male diabetic Rats compared to controls and glibenclamide drug. For this reason, male Albino rats were equally divided into seven groups designated as normal control, diabetic control, diabetic + glibenclamide (Glyburide) drug (600 µg kg−1 body weight), diabetic + Spirulina biomass suspension (50 mg/ml/ kg−1 body weight), diabetic + phycocyanin (50 mg kg−1 body weight), diabetic + phycocyanopeptide (49 mg kg−1 body weight) and diabetic + phycocyanobilin (982 µg kg−1 body weight). The results show a statistically significant reduction (P < 0.05) level of fasting blood glucose, insulin resistance and lipids levels in diabetic animals administration with Spirulina Platensis, phycocyanin, phycocyanopeptide and phycocyanobilin compared with diabetic control. Also, there were an increase in HDL–cholesterol levels and β-cell function in these treatments. Histopathologically, diabetic rats treated with spirulina, PC, PCP induced a slight improve of pancreatic cells and an obvious recovery of pancreatic cells. The expression of insulin secretion from cells (β-cells) of diabetic rats was improved in the groups treated with Spirulina, phycocyanin, phycocyanopeptide. While, diabetic rats treated with phycocyanobilin recorded insulin levels lower than them. From this study it can be concluded that Spirulina Platensis, phycocyanin, phycocyanopeptide and phycocyanobilin possessed hypoglycemic, insulin sensitivity and hypolipidemic effects. Hypoglycemic and hypolipidemic effects of Spirulina Platensis may be attributed to phenolic compounds and phycocyanin. The antidiabetic effect of PC is most likely due to its ability to reduction of insulin resistance, enhance β-cell function and recovery of β-cells. The effect of PC may be attributed to selenium-binding phycocyanopeptide or/ and phycocyanobilin responsible for the antioxidant activity and chromium-binding phycocyanopeptide which activates insulin receptors.
Afficher plus [+] Moins [-]IDENTIFICATION AND CHARACTERIZATION OF HEAT SHOCK PROTEINS IN FOUR EGYPTIAN MAIZE INBRED LINES (Zea mays L.)
2018
Fatma Mahmoud | M. Rashed | K. Khalil | M. Abou-Deif
The heat shock protein (HSP) family is one of the proteins universally accumulated under heat stress condition. Four Egyptian maize inbred lines (Zea mays L.) were studied to identify heat shock proteins under heat stress at 45°C as protein markers for detecting the thermo-tolerance inbreds. The protein fingerprints of four inbred lines were performed by grain total-soluble protein electcophoretic analysis. The protein electrophoretic analysis showed 18 bands in a distinct pattern of K1 and K7 inbred lines, while 17 bands were present in G342 and Rg59 inbred lines as another distinct pattern indicating different genotypes. The high temperature effect on four maize inbred lines exposed to 45°C for 2 and 4 hours at 14-days old seedlings besides control (25°C) was studied. Several protein bands varied between low and intermediate molecular weights were induced after exposing to heat stress at 45°C. Four bands of heat shock proteins with molecular weights of 82, 22, 17 and 10 kDa appeared in the inbred line K1 after exposing to 45°C for 2 and 4 hours which may be indication of thermo-tolerance. Four and seven bands were enhanced after exposing to high temperature for 4 hours at 45°C which appeared more concentrated in the patterns of K7 and G342 inbred lines, respectively.
Afficher plus [+] Moins [-]THE IMPACT OF THE PROBIOTIC BACTERIA ON THE CONTAMINATED MICROBIAL OF THE FEMALE GENITAL TRACT AND ITS EFFECT ON THE IVF OUTCOME
2018
Hagar Ali | K. El-Dougdoug | M. .Soliman | M. Hazaa | M. M.M. Sowelam
The microbial contamination of the female genital tract has effect on the ivf outcome and negatively effect on fertility, fertilization and implantation rate. Lactobacillus sp. is the dominant organism of the vaginal flora that have an important role in the inhibition of pathogen. 48 patients were selected for this study aged between 20-40 years, During embryo transfer, 3 samples were collected from each patient from vagina, end cervical canal and the tip of the catheter. The samples were assayed microbiology. The microbial culture contained natural flora and pathogen organism .The isolated pathogens were identified as Klebsilla pneumonia, Escherichia coli, Candida albicans, C. tropicalis, C. famata, C. parapsilosis, C. catenulate according to Bergeyˊs manual and confirmed by VITEK System. Candida sp found to be the most frequent infemale genital tract. The probiotic (Lactobacillus. acidophilus) and its metabolites (bacteriocin) were inhibited growth of isolated pathogenic microbial in vitro.The result showed that L. acidophilus and their metabolite bacteriocin have antagonistic activity against pathogenic microbes. Recommendation: Oral or transvaginal administration of Lactobacillus or bacteriocin antiseptics; disinfected; maintain a health vagina and prevent the infection of the reproductive tract.
Afficher plus [+] Moins [-]GINGER ETHANOLIC EXTRACT, GINGER OIL OR RICE BRAN OIL INDUCED HEPATOPROTECTIVE EFFECT AGAINST FATTY LIVER IN RATS
2018
H. Abd Allah | B. Abd El-wahab | K. Ramadan | S. Ali
Hepatoprotective effect of ethanol extract of ginger, ginger oil or rice bran oil against fatty liver disease which induced by ethanol stress was investigated in the present study. Thirty six (36) male albino rats were classified into 6 groups as follows: 1- Normal control (NC), 2- Positive control (induced fatty liver by ethanolic stress) (PC+), 3- rats group administered ethanol and ginger extract (GE group), 4- rats group administered ethanol and ginger oil (GO group), 5- rats group administered ethanol and rice bran oil (RBO group) and 6- rats group administered ethanol and DMSO (DMSO control group, because GE, GO and RBO were dissolved in DMSO as a vehicle). Results revealed that hepatic triglycerides was significantly (p≤0.05) raised to 80.7 mg/g liver, in positive control (PC+), compared to 15.98 mg/g liver in normal control (NC). Also significant increase (p≤0.05) in levels of ALT (69.41 U/L), AST (62.98 U/L) and ALP (121.65 U/L) in PC+, compared to their levels in NC (23.35 U/L), (27.95 U/L) and (73.45 U/L) respectively. In addition, high significant level was observed in serum triglycerides (214.37 mg/dl), total cholesterol (TC) (99.81 mg/dl) and LDL cholesterol (47.75 mg/dl) in PC+, compared with its values in NC group: (74.22 mg/dl), (31.45 mg/dl), (4.21 mg/dl) respectively. However, significant (p≤0.05) decrease was noticed in HDL cholesterol level (9.18 mg/dl) in PC+, compared to NC (12.39 mg/dl). On the other hand, treatment by ethanolic ginger extract (200 mg/kg body weight) showed a hepatoprotective effect which confirmed by remediation the values of hepatic TG, ALT, AST, ALP, TP, Alb, besides serum TG, TC, HDL-C and LDL-C in GE group as compared with their values in NC and PC+. Moreover, treatment by ginger oil (200 mg/kg body weight) and rice bran oil (200 mg/kg body weight) displayed a protective effect in GO or RBO groups, but lower than GE. In addition, ethanol extract of ginger disclosed very high antioxidant activity (IC50 = 18.25 µg/ml) compared to both ginger oil (IC50 = 6714.38 µg/ml) or rice bran oil (IC50 = 1409.57 µg/ml). Finally the present study indicates that ethanol extract of ginger showed hepatoprotective effect more than either ginger oil or rice bran oil.
Afficher plus [+] Moins [-]EXOGENOUS APPLIED PUTRESCINE ELEVATE DROUGHT TOLERANCE OF SUNFLOWER PLANTS BY MODIFYING OF SOME PHYSIO-BIOCHEMICAL PARAMETERS
2018
A. Faisal | M. Ibrahim
Field Experiments were conducted at the Experimental Farm, Faculty of Agriculture, Ain Shams University, Shoubra El-Kheima, Egypt during 2014 and 2015 seasons to evaluate the effect of foliar spray of putrescine (Put) at 0.1 and 0.2 mM on growth and some physio-biochemical compounds of drought stressed sunflower. Putrescine application could be mitigate the negative effect of drought by increasing leaf relative water content (LRWC), proline, total soluble sugars, K and Ca concentrations of sunflower leaves. Correlation coefficient revealed that LRWC was inversely proportional to proline concentration on the one hand and directly proportional to K+ and Ca++ concentrations on the other hand. The modification of physio-biochemical parameters by Put treatments led to increase plant growth and seed-oil yield of sunflower under drought stress.
Afficher plus [+] Moins [-]COMPUTATIONAL MODEL TO IMPROVE DAIRY ANIMAL FEEDING UNDER MIXED FARMING SYSTEM (CROPS/LIVESTOCK) AS STUDY CASE
2018
H. Ismail | A. Al-Sadek | A. Ashmawy | M. Khalil | Manal Elsayed
Computational model was designed for feeding systems of small dairy farms in Egypt under Mixed Farming System (MFS) (Crops/livestock). The present case study was selected from El-Beheira governorate, where the three common dairy animals (Local cows, Crossbred cows and buffaloes) are available. The main objectives of this study were 1- To find out the optimum combination of inputs from farm green forage and cash crops to minimize animal feeding costs. 2- Asses the possibilities of increasing the farm income by least cost rations formulation using available feed resources for dairy cattle. Technical coefficients of the models were obtained from previous studies under Egyptian condition. The model proposed three scenarios: Scenario I (S I) calculated the actual feeding situation from the case study without any changes as base run, scenario II (S II) proposed to cover animal feeding requirements of the same herd in scenario (S I) from the same available feed resources according to NRC (2001) and scenario III (S III) operating on the available feeding package quantities or reallocated farm feed resources for the same herd. The model used the common feed in summer and winter seasons (300 days) while, two months were considered as transitional period between two seasons, where irregular animal feeding regime is adopted. The results showed that area cultivated with green forages can be reduced by 17% and 25% of total planted area in SII for winter and summer, respectively, compared to base run (SI). Where as in S III, the green forage cultivated areas reduced by 30% and 25% for winter and summer, respectively in comparison with SI, feeding costs in SII were reduced by 51.11% and 38.97% in winter and summer, respectively. Using available feeding packages and reallocated farm resources in SIII reduced feeding costs by 47.78% and 27.67% for winter and summer, respectively. It can be concluded that using available feeding packages or reallocated animal feeding resources either in SII and SIII achieved a considerable reduction on animal feeding costs of small-scale mixed farms compared to base run scenario (SI).
Afficher plus [+] Moins [-]EFFECT OF BARLEY FLOUR ON WHEAT BREAD QUALITY
2018
H. El-Taib | I. Rizk | E. Yousif | Amal Hassan
This study was carried out to investigate the possibility of utilization of barley flour in production of pan bread. wheat flour of (72% extract) was replaced by 10, 15 and 20% barley flour. The effect of such replacements on physical and chemical characteristics of produced pan bread were studied. The results indicated that barley flour had a higher contents of chemical composition than that in wheat flour except carbohydrate content was the highest in wheat flour (85.53%) than in barley flour (76.67%),whereas, protein, ash, dietary fiber, β-glucan and antioxidant were higher content in barley flour (13.63, 2.44, 19.00, 8.65, 97.34 respectively) as compared with its content in wheat flour (12.26, 0.49, 4.88, 0.34, 55.33 respctively),while, wet gluten and falling number were reduced by added barley in composite flour. The rheological properties of the five dough mixes were studied using farinograph and extensograph. The water absorption and dough weakening increased as the percentage of barley flour increased, while were decreased the extensibility and maximum resistance to extension . The results of sensory characteristies of prepared bread (containes10% barley flour) was not significants different from control for crust color, grain and texture. The results revealed that it was possible to use barley flour at level of 10, 15% to produce bread that satisfied baker's and consumer's sensory expectation. This levels may be to increased the nutritional value from dietary fibers, β-glucan, minerals, vitamins and antioxidants.
Afficher plus [+] Moins [-]ECONOMIC STUDY FOR THE SUPPLY RESPONSE OF SUGAR CROPS IN EGYPT
2018
Eman Ahmed
Agriculture sector is one of essential sector in the Egyptian economy. The sector is the main source of food required by Egyptian people, in addition to that the sector is also a source of row materials for many in industries. On the other hands, sugar cane and sugar beet crops are the main source of sugar in Egypt as well as in many other countries. The average sugar cane area and production were about 0.32 millon Fadden and 15.60 millon tons during the period (1995-2014). While sugar beet area was 0.21 millon fadden and 4.53 millon ton during the years (1995-2014). The research problem may be concentrated on that domestic sugar production is short meeting local consumption and there for the government has to fill the gap through imports which means a burden on government budget. The shortage of domestic sugar production is mainly due to the limited area of sugar cane crop, which is mainly due to the limited agricultural land and water. The increase of population and the per capita consumption of sugar and the need to rationalize water use have made sugar production in Egypt more accurate. The main objective of the present research is therefore a trial to estimate farmers supply response of sugar response of sugar produced from sugar cane and sugar beet in an attempt to reduce sugar imports. The study has also tried to examine factors that may affect sugar consumption, i.e. social and political factors are also taken into consideration. The study showed that Brazil, India and China are the main producer of sugar cane, 48.32%, 29.32% and 9.31% respectively. The three countries produce together about 87% of sugar from sugar cane. On the other hand, France, USE, Germany produce together about 66% of total sugar beet. A study of supply response of sugar cane showed that farm price of sugar cane with two years lag and net return per Fadden with one year lag the important factors affective sugar cane production .As for sugar beet production, it was found that farm price and area with one year lag were the most important factor affecting sugar supply from sugar beet. The study recommends the expansion of sugar beet area particularly in the now reclaimed land in addition to of farming an encouraging price to farmers. Finally it is advisable to rationalize sugar consumption by Egyptian people.
Afficher plus [+] Moins [-]