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Foliar Fertilization of Different Species of Mulberry Trees and Its Impact on Silkworm Bombyx mori Productivity from Cocoons and Eggs
2021
sawsan abdelmegeed
Rearing mulberry silkworm was found to be dependent on leaves quality of mulberry trees, larvae of mulberry silkworm fed on two species of mulberry trees Morus alba and Mo-rus nigra were treated with foliar fertilizer (Basfoliar 20-19-19 SP contains 20% N, 19% P2O5, 19% K2O, 5% NO3, 3.6% NH4 and 11.4% NH2) with three different concentra-tions,1%, 3% and 6% in addition to control treatment for comparison. When larvae were fed on leaves of mulberry trees one day after Treatment, high mortality (up to 100%) was observed specially with 6% concentration. Mean weights of larvae, cocoons and cocoon shell and fecundity were negatively affected when compared to control. On the other hand, when larvae were fed on leaves of mulberry trees, no mortality occurred after two weeks of treatment in all concentrations, in addition, the mean weights of larvae at the end of 4th and 5th instar larvae, cocoons and cocoon shell s in-creased at 3% concentration compared with other concentrations and control. The highest fecundity occurred in female moths when lar-vae were fed on leaves of M .nigra compared with M. alba as well as 3% concentration com-pared with other concentrations and control.
Mostrar más [+] Menos [-]Effect of Clinoptilolite on Humoral Immunity and Biochemical Parameters in Calves Vaccinated with Foot and Mouth Disease Vaccine
2021
Nour Elhoda Tamim | Dawlat Salama | Hani Srour | Ehab Ibrahim
The foot and mouth disease (FMD) vaccine is used to control the FMD in cloven-hoofed animals including calves. The most important step in vaccine preparation is the selection of a suitable adjuvant which plays a main role in the vaccine’s potency. The present study is an attempt to use clinoptilolite instead of Montanide oil to enhance the efficiency of the FMD vaccine and reduce its production cost. Twelve calves were split into four groups. Three groups were vaccinated with FMD vaccine with different adjuvants i.e. 100% Montanide (ISA 206), 50% of Montanide with 1.0 μg/dose of clinoptilolite (ISA 206+CLINP), and by replacing the 100% of Montanide to 1μg/dose of clinoptilolite (CLINP). The fourth group was unvaccinated. Results showed that calves vaccinated with (ISA 206+CLINP) FMD vaccine expressed the highest and the longest periods of immune response until 38 weeks. While groups vaccinated with (CLINP) or (ISA 206) vaccine showed only protection up to 26 and 34 weeks respectively. Also, our results showed that clinoptilolite improved organ functions resulting from the stress of vaccines. Finally, this study recommended the use of clinoptilolite with Montanide oil as a potential adjuvant in the FMD vaccine to give high stimulation of the immune response.
Mostrar más [+] Menos [-]Evaluation of Some Adjuvants in Improving Foliar Fertilizers Efficiency
2021
Dina Omran | Ahmed Ibrahim | Manal Mohamed | Mona Nossier
A series of lab and field experiments were carried out to evaluate the possibility of using some substances as adjuvants added to the foliar fertilizer tank to improve fertilizer application and enhance use efficiency. Each of the suggested substances was prepared in 10 concentrations treatments, ranging between 0.05 and 2g/L. The effect of each concentration on static surface tension and static contact angle in liquid/air/glass and solid plant leaves/air interface were used to evaluate and find out the optimum concentration of each substance to be used as an adjuvant. An Adjmix-D1 was pre-pared using 0.6g/L Triethanolamine and 0.6g/L liquid soap as surfactants, 0.6g/L glycerin as a humectant, 0.6 g/L Arabic gum as a sticker and 0.6g/L urea as a penetrator. The obtained results showed that fruit yield as well as N, K, Fe, Zn and Mn contents in white eggplants and cucumber leaves are positively increased by the applications of improved foliar fertilizers (IFF). This increase can be arranged in the following descending order: Adjmix-D1 > Adjmix-D2 > Liquid soap > Rixi film > Triethanolamine. It could be concluded that the Adjmix-D1 can be used as an effective adjuvant for improving foliar fertilizer application efficiency.
Mostrar más [+] Menos [-]Susceptibility of Some Ornamental Plants to Aphid Infestation and Effects on Plant Biochemical Components and Morphological Structures
2021
Rania Rashwan
Aphid is a major insect pest attacking ornamental plants. It causes great damage by reducing the economic values of plants. The investigated research aims to determine the relation between leaf biochemical components, morphological structures of plant leaf surface and the susceptibility of seven ornamental plants to Aphid Infestation. Highest recorded aphid infestation was observed on Tecoma stans during 2017 and 2018 seasons followed by Rosa damascena and Jasminum grandiflorum. There was no rec-orded infestation on four inspected ornamental plants, Ruta graveolens, Schefflera actinophylla, Nerium oleander and Bougainvillea spectabilis. Activity of antioxidant enzymes plays as defense line when increasing the insect population density. Biochemical components are varied among different plants that prevents or reduces insect infestation, as tannins, total phenol, and Phenol oxidase. Trichomes are considered as main morphological character in plant defense system. These results enhanced utilization resistant ornamental plants due to preventing aphid infestation. It is considered one of the integrated pest management programs, that achieves health environment without more insecticidal application.
Mostrar más [+] Menos [-]Turmeric Extracts as a Protective Natural Compound Against Hepatotoxicity Induced by Lead Nitrate in Male Albino Rat Model
2021
Abd el-Fattah Abd el-Fattah | Medhat Abozid | Kamal Mahmoud
Excessive exposure to lead may damage the liver by increasing oxidative stress, leading to many serious diseases. Dietary antioxidants may protect the liver from damage. Therefore, the effect of ethanolic and aqueous turmeric extracts against lead-induced liver damage was evaluated by estimating liver function and antioxidant/oxidative stress biomarkers. Forty rats were divided into group (A) served as the control and group (B) was treated with 93 mg/kg b.wt. lead nitrate; while group (C) and group (D) were treated as group B in addition to 400 mg/kg b.wt. of turmeric aqueous and ethanolic extracts, respectively. Group B showed a significant increase in the activities of alanine transaminase by 10 folds, aspartate transaminase by 9 folds, alkaline phosphatase by 3 folds and the level of malondialdehyde by 10 folds, while showed a significant decrease in albumin by 60%, total protein by 54.5%, and superoxide dismutase by 80.5%, catalase by 75% and glutathione by 71.6% in comparison with those of the control group. On the other hand, turmeric treatments (groups C and D) led to a readjustment of levels for such biomarkers. Collectively, these results demonstrate the potential of turmeric extracts (particularly the ethanolic extract) to improve the fatal effect of lead in a rat model.
Mostrar más [+] Menos [-]Preparation and Thermal Stability of α-Tocopheryl acetate and Strawberry Anthocyanins Complexed with Starch and β-Cyclodextrin
2021
Eman Rashed | Hussein Ali | Mohamed Attia | Eslam Bendary | Khaled Ramadan
In the sake of enhancing the thermal stability of α-Tocopheryl acetate (α-TA) and Strawberry Anthocyanins (AN), their encapsulation with starch or β-Cyclodextrin were prepared and characterized by UV-Vis and IR spectra in addition to thermal analysis. Thermal stability was investigated by comparing the thermographs of each host and guest with that of the prepared complex. Both hosts provided extra thermal stability to both guests where α-TA is stabilized from 230 to 291oC by complexation with starch and to 285oC by encapsulation with β-CD. AN was also stabilized from 40.02oC to 75.57 and 79.46oC by complexation with starch and β-CD respectively.
Mostrar más [+] Menos [-]Producing of Biodegradable Plastic Films from Un-marketable Potato Tubers
2021
Aya Kobash | Moubark Moustafa | Fathi Abdel-hadi | Ashrf Anwer
This study was conducted to reduce the volume of solid wastes by using unmarketable potato tubers for producing biodegradable plastic films to substitute oil-based plastics “OBP” which is often not biodegradable. Starch-based plastic films “SBP” were produced with different concentrations of glycerol (5, 10,15, 20,25, 30, 99.5%v/v) as a plasticizer. The physical properties of SBP including thickness, density, water absorption, and biodegradability, were studied, as well as mechanical properties including tensile strength, modulus of elasticity, elongation % and the required energy for the firm were also investigated compared with OBP samples. The results showed that the maximum value of extracted starch was 13.5% obtained by blending potato tubers. SBP films with elevated glycerol concentration in-creased the sample thickness but decreased its density. Glycerol 20% gave the best flexible compact structure SBP films. The average thickness and density of SBP film (20% glycerol) were 0.25 mm and 80.11 Kg/m3 respectively. Meanwhile, the average thickness and density for OBP films were 0.41 mm and 24.39 Kg/m3 respectively. The rate of mass loss of SBP films with 20% glycerol concentration was 72% after 96 days while the rate of mass loss for OBP films is neglectable. Consumed energy for the firm was 44.05 and 31.06 N. mm.
Mostrar más [+] Menos [-]Soil hydrophysical properties as affected by kind of added polymer.
2020
Asmaa Musa | E Sallam | Usama Elbehairy | M Galal
Laboratory experiments were carried out to clarify the impact of different types of natural and synthetic polymers on some hydrophysical properties (soil hydraulic parameters) of a sandy soil. Adding 0.5% (w/w) of each treatment to soil significantly increased water retention at saturation, field capacity, total available water and readily available water. This treatment decreased the value of inflection point on water retention curve as result of enhancing water behavior in the soil. The obtained results revealed that soil water storage significantly increased from 0.271 in control treatment (without adding polymer) up to 0.414 in treatment [T10] (Acrylic acid + Xanthan) while, field capacity increased significantly from 0.078 in control up to 0.242 of the abovementioned treatment (T10). Regarding the effects of polymer application in total available water and readily available water, data revealed significant increases in the above mentioned parameters. Total available water increased from 0.044 in control treatment up to 0.153 in T10 and readily available water increased from 0.057in control treatment up to 0.185 in T10. Concerning values of inflection point on soil water retention curve, the obtained results revealed that, inflection point of control treatment (1000 mbar) decreased to 590 mbar, as a result of adding a mixture of polymer acrylic acid + xanthan (T10 ).Soil depletion rate decreased as due to polymer application by 25% up to 75% depending on type of polymer and wether it was added individually or in combination with another polymer. This effect led to significant differences among control treatment (control) and the other treatments. Generally, there were significant effects of all polymers on the concerned hydrophyical properties of the studied sandy soil, i.e. storage capacity of soil water, depletion rate of soil water, soil field capacity , soil available water, readily available water and inflection point on the soil water retention curve. Acrylic acid recorded the best results concerning soil water behavior if it was added individually to the sandy soil (Treatment 2) or in combination with Xanthan (Treatment 10) or with Lignosulphonate (Treatment 11).
Mostrar más [+] Menos [-]Effect of seaweed extract and biofertilizer on organic production of common bean seeds (Phaseolus vulgaris L.)
2020
M Amin | M Elshinawy | M Abdallah | H Abd El-Gawad
At the Experimental Farm, Agriculture Faculty, University of Ain Shams, Qaliobia Governorate, Egypt, in order to investigate the influence of biofertilizer ( Bio. ); Rhizobium ( R ), mycorrhiza ( MF ), R + MF and control, seaweed extract (SWE) concentration (zero, one, two and four gram per liter) and their interactions on vegetative growth, productivity and quality of seed common bean cv. Nebraska. Before planting, the seeds were soaked in MF (glomus sp.) and sown on the first of March 2016 and 2017 seasons respectively. The experimental plot area was seven m2 (four rows). The length of each row was 2.5 m and width of 0.7 m. The plant's distance was seven cm on one side, and an alley (one width m) was left as a border between the treatments. After two weeks of planting, young plant were inoculated with R phaseolus after the first irrigation. Plants were sprayed three times of SWE (30, 45 and 60 days) after sowing. A split plot design with four replicates was used; where the main plots are Bio treatments and the subplots are SWE treatments. The obtained results clearly indicated that different applied treatments increased measured growth characteristics (No. leaves/ plant, leaf area and total chlorophyll (SPDS)), the yield and components of yield (No. pods/plant, seed yield /plant and seed yield) and chemical constituents (total protein, carbohydrates, nitrogen and phosphorus) in seed after harvest. As well as, the best results were obtained by interactions between SWE (two and four gram per liter) and Bio. (R + MF) treatments in the two assigned seasons So adding combination between Bio. ( R + MF ) and SWE (two or four g) to improve vegetative growth, productivity and quality of common bean seed could be recommended under organic system ( conversion to organic agriculture ).
Mostrar más [+] Menos [-]An Analysis of Household Demand for Food Away from Home (FAFH) in Riyadh, Saudi Arabia: A Right-Left Truncated Generalized Poisson Regression Model
2020
Alaa Kotb | M Alnafissa | M Alderiny | Sh Ahmed
This study analyzed the determinants of household demand for food away from home (FAFH) in Riyadh, Saudi Arabia. Truncated generalized Poisson regression (TGPR) and truncated standard Poisson regression (TSPR) was applied to data from a random sample of 101 families. Maximum likelihood was used to obtain parameter estimates for these two models. TGPR was found to be optimal and appropriate for the analysis of demand data. Both income and number of household members had a significant positive effect, which is consistent with economic logic and reality in Saudi society. Price and taste also had positive effects on FAFH demand. Household income as an economic variable has a significant positive effect on the number of times that a household dines out during the month. When income increases by one thousand Saudi riyals, the demand will increase by 11%, which is consistent with economic logic. Household income as a quantitative economic variable and the number of household members as a quantitative demographic variable are the most important variables in household demand for FAFH. However, the effect of income is more significant than that of the number of household members. As this study investigated the impact of socio-economic and demographic factors on food away from home (FAFH) demand in Riyadh such as household income, number of household members, education level, prices and cleanness of restaurant, and taste of food. Still there are other variables could be used as potential variables could affect FAFH demand in Saudi Arabia in future research such as the change in number of working women which there is shift in the number of female workers recently. The future studies could look at the differences in socio-economic between consumers for different types of restaurants such as traditional, fast food, fish, and luxury restaurants. Due to the high demand for restaurant meals, officials should tighten the health control and close restaurants that do not comply with health requirements as well security and safety requirements. Restaurants should pay attention to improving the quality of meals and offering them at affordable prices to consumers.
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