25 results on '"E. El-Said"'
Search Results
2. Effect of Growing Area on Yield Traits, Fiber and Yarn Properties in Egyptian Cotton Genotypes by Using Biofertilizer Inoculation, Vermicompost and Algae Extract. تأثير منطقة الزراعة على صفات المحْصول وصفات جوُدة التيلة والغزل لبعْض التراکيب الوراثية فى القُطن المصْرى بإستخدام التلقيح الحيوى والفيرم کُمبوست ومُستخْلص الطحالب
- Author
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Mona H. A. Hussein, Hala A. M. El-Syed, Hamed Sayed Ahmed, and Gehan A. E. El-Said
- Subjects
Lint ,Horticulture ,Inoculation ,Soil organic matter ,Biofertilizer ,engineering ,Habit (biology) ,Fertilizer ,engineering.material ,Biology ,Vermicompost ,Calcareous - Abstract
These experiments were conducted to study the response of some Egyptian cotton, Giza 96 (extra-long stable) and Giza Giza 96 (extra-long stable)varieties and its yield characteristic, lint percentage, fiber and yarn properties when using bio-fertilizers such as vermicompost, Bacteria bacteria inoculums (Bacillus polymxa, Bacillus megaterium and Bacillus circulans) and algae extract under different growing area, Sakha region (clay soil) and El-Nubaria region (calcareous soil).Concerning the effect of different treatments application on soil properties, thisresults showed a significantly increaseof soil organic matter, pHit was relatively insignificantly decreased and the vermicompost treatments had positive effects on the levels of N, P and K. available. As soil biological count of Bacteria, Fungi, Actinomycetes and Carbon dioxide evolution rate it showed a significant increase. The content of cotton plant leaves of chlorophyll A, B, Carotenoids and Total phenols was significantly improved under different fertilizer treatments compared to the control.The treatment with (vermicompost fertilizer + bacterial inoculation + 50% of mineral fertilizer recommended dose + algae extract) proved its superiority over the rest of the treatments, especially in the seed cotton yield, and lint percentage, which increased at 1.41 kentar per feddan and 0.63(lint %) compared to the two control treatments. Data of cotton yield characteristics, fiber and yarn properties were recorded significantly different due to cultivated in different regions.The difference among studied varieties may be due to the growth habit and response of each one to environmental conditions, which controlled by genetic factors and efficient utilization of inputs and natural resources.
- Published
- 2021
3. Potential risk factors associated with ill-thrift in buffalo calves (Bubalus bubalis) raised at smallholder farms in Egypt
- Author
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Mohamed A. Ali, Sabry A. El-khodery, and Waleed E. El-said
- Subjects
Buffalo calves ,Egypt ,Epidemiology ,Ill-thrift ,Risk factors ,Medicine (General) ,R5-920 ,Science (General) ,Q1-390 - Abstract
Failure to grow (ill-thrift) in calves has a negative effect on animal production and health. The present study was carried out from November, 2009 to May, 2013 to investigate the risk factors of ill-thrift in buffalo calves. A total of 344 calves at 78 smallholder farms were selected randomly. A questionnaire was designed to include managemental, nutritional and disease risk factors. Serum selenium, copper, zinc, iron, calcium, phosphorus and magnesium were measured. Data were subjected to logistic regression analysis and results were expressed as p value, odds ratio (OR) and confidence interval (CI). Fifty-five calves (15.9%) showed ill-thrift. On animal level, the final multivariate logistic regression model showed a significant association between ill-thrift and early weaning (p
- Published
- 2015
- Full Text
- View/download PDF
4. Optimal Location and Size of Fixed Capacitors on Single Radial Feeder.(Dept.E)
- Author
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M. E. El-Said and Kamal M. Shebl
- Subjects
Computer science ,Capacitive sensing ,General Engineering ,Hardware_PERFORMANCEANDRELIABILITY ,Load factor ,Sizing ,law.invention ,Cost savings ,Reduction (complexity) ,Capacitor ,Hardware_GENERAL ,law ,System capacity ,Control theory ,Hardware_INTEGRATEDCIRCUITS ,General Earth and Planetary Sciences ,Shunt (electrical) ,General Environmental Science - Abstract
This paper presents an optimal method for locating and sizing of fixed shunt capacitor banks in case of static load on single radial distribution feeder. Mathematical models to represent cost saving due to power and energy loss reduction are presented considering growth in load, growth in load factor and increase in cost of energy. The cost saving due to release in system capacity, capacitor cost, voltage drop and voltage pipe constraints as a function of capacitive current flows in feeder segments have been formulated. The cost functions have been performed for optimizing the choice of fixed shunt capacitors. This proposed method has a special advantage that the optimal location of capacitors is limited by the lean period voltage rise constraint and thus avoiding over-voltage Problems during the off-peak hours. The effect of unit-capacitor value on optima i solution is introduced.
- Published
- 2021
5. Anti-Cancer Activity of Curcin and Latex Isolated from Jatropha Plant (Jatropha Curcas L.)
- Author
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Bakheet Elsadek, A. M. Ahmed, M. A. A. E. El-said, and M. M. Ibrahim
- Subjects
Traditional medicine ,medicine ,Jatropha ,Cancer ,Biology ,biology.organism_classification ,medicine.disease ,Jatropha curcas - Published
- 2020
6. Circulating Cell-Free DNA as Inflammatory Marker in Egyptian Psoriasis Patients
- Author
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Asmaa S Farag, Abeer M Kamel, Haneya A.A. Anani, Enas E. El-Said, Amany M. Tawfeik, and Soheir S. Maklad
- Subjects
medicine.medical_specialty ,biology ,Exacerbation ,business.industry ,C-reactive protein ,Erythroderma ,Inflammation ,Dermatology ,medicine.disease ,Gastroenterology ,Circulating Cell-Free DNA ,Lesion ,030207 dermatology & venereal diseases ,03 medical and health sciences ,0302 clinical medicine ,Rheumatology ,030220 oncology & carcinogenesis ,Internal medicine ,Psoriasis ,medicine ,biology.protein ,Methotrexate ,medicine.symptom ,business ,medicine.drug - Abstract
Background Cell lesion and apoptosis with release of cell -free DNA (CFD) in circulation are associated with chronic inflammation of psoriasis. Objective The objective of this study was to determine the CFD concentrations in sera of patients with psoriasis, to assess its relationship with disease severity as defined by Psoriasis Area Severity Index (PASI) and other inflammatory biomarkers (C-reactive protein (CRP) and erythrocyte sedimentation rate (ESR)) levels, and to monitor the efficacy of treatment. Patients and methods Thirty adult patients with different types of psoriasis (25 vulgaris; 10 mild, 15 moderate and 5 erythroderma; severe) were evaluated during the exacerbation phase of the disease, before starting (T0) and after 12 weeks (T12) of treatment with topical therapy for mild cases, narrowband-ultraviolet light B (NB-UVB) for moderate cases and methotrexate for severe cases. Twenty healthy controls were also involved in the study. The concentrations of CFD in sera were measured before and after treatment by quantitative real time PCR (qPCR) using primers of the human β -globin gene. Results At T0, all patients presented significant higher levels of ESR (P=0.05) and CFD (P=0.001) compared with controls. Highly significant elevations of all parameters were observed in severe disease (erythroderma) compared to mild/moderate disease (vulgaris). Methotrexate treatment induced highly significant reductions in all inflammatory markers including CFD (P= 0.042) while topical and UV irradiation therapies had no effects. CFD concentrations showed positive correlations with both PASI (r=0.422, P=0.020) and ESR (r=0.321, P=0.023) only before the start of treatment. Conclusion The level of circulating CFD could be used to monitor psoriasis severity. However, its level cannot be stated for the treatment, except in severe erythrodermic patients upon successful treatment with methotrexate. We recommend validation of a convenient and accurate DNA assay applied directly to biological samples which does not require prior DNA extraction and amplification.
- Published
- 2020
7. An optimization algorithm for simulation-based planning of low-income housing projects
- Author
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Mohamed M. Marzouk, Osama A. Omar, Manal S. Abdel Hamid, and Moheeb E. El-Said
- Subjects
Construction management ,Planning and scheduling ,Low-income housing ,Computer simulation ,Optimization ,Genetic algorithms ,Medicine (General) ,R5-920 ,Science (General) ,Q1-390 - Abstract
Construction of low-income housing projects is a replicated process and is associated with uncertainties that arise from the unavailability of resources. Government agencies and/or contractors have to select a construction system that meets low-income housing projects constraints including project conditions, technical, financial and time constraints. This research presents a framework, using computer simulation, which aids government authorities and contractors in the planning of low-income housing projects. The proposed framework estimates the time and cost required for the construction of low-income housing using pre-cast hollow core with hollow blocks bearing walls. Five main components constitute the proposed framework: a network builder module, a construction alternative selection module, a simulation module, an optimization module and a reporting module. An optimization module utilizing a genetic algorithm enables the defining of different options and ranges of parameters associated with low-income housing projects that influence the duration and total cost of the pre-cast hollow core with hollow blocks bearing walls method. A computer prototype, named LIHouse_Sim, was developed in MS Visual Basic 6.0 as proof of concept for the proposed framework. A numerical example is presented to demonstrate the use of the developed framework and to illustrate its essential features.
- Published
- 2010
- Full Text
- View/download PDF
8. Neurotherapeutic Effects of Bee Venom in a Rotenone-Induced Mouse Model of Parkinson’s Disease
- Author
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N. M. Ahmed, K. S. Mekawi, R. A. Tawfiq, Mohammed Anwer, M. K. Rakha, A. F. Mohamed, A. M. Abd El-Aziz, S. M. Salama, Sh. E. El-Said, M. G. El-Hendy, M. M. Sadek, and M. M. Elmazar
- Subjects
0301 basic medicine ,medicine.medical_specialty ,Parkinson's disease ,Physiology ,business.industry ,General Neuroscience ,Dopaminergic ,Hippocampus ,Striatum ,medicine.disease ,03 medical and health sciences ,030104 developmental biology ,0302 clinical medicine ,medicine.anatomical_structure ,Endocrinology ,nervous system ,Cerebral cortex ,Dopamine ,Internal medicine ,Basal ganglia ,medicine ,business ,030217 neurology & neurosurgery ,Pyknosis ,medicine.drug - Abstract
Parkinson’s disease (PD) is a widespread progressive neurodegenerative disease; its main neuropathological hallmark is massive loss of dopaminergic neurons. Most PD studies were focused on the basal ganglia. However, the cerebral cortex, hippocampus, and striatum also play certain roles in PD pathophysiology. Dopamine replacement therapies remain the most effective clinical option for PD patients despite the occasional severe side effects. Bee Venom (BV) produced by Africanized honey bee, Apis mellifera L., is rich in neuroactive molecules; this venom is an irrefutable source of neuroprotectors and neuromodulators. In our study, we evaluated the neurotherapeutic effects of Egyptian BV against PD hallmarks in a PD mouse model. Six subcutaneous injections of 1.5 mg/kg of rotenone at 48-h-long intervals induced significant reductions in the motor strength and motor coordination. Additionally, significant declines in the dopamine level and total antioxidant capacity combined with significant elevation in interleukin 1β and interleukin 6 were observed. Rotenone-treated mice showed nuclear pyknosis and neuronal degeneration in the cerebral cortex and hippocampus, eosinophilic plaques, and hemorrhages in the striatum focal area and nuclear pyknosis and neuronal degeneration with diffuse gliosis in other brain structures. In rotenone-treated mice, i.p. injections of BV (6 doses 1.0 mg/kg at 24-h-long interval) recovered motor strength and motor coordination. Moreover, BV markedly increased the dopamine level and total antioxidant capacity. Also, BV greatly reduced the interleukin 1β and interleukin 6 contents. Furthermore, BV preserved neurons in the dentate gyrus of the hippocampus with no histopathological alterations. Besides, BV restricted nuclear pyknosis and neuronal degeneration in a few neurons in the cerebral cortex, hippocampus, and focal area of the striatum. Overall, BV may be a promising biotherapy for PD patients.
- Published
- 2018
9. Circulating Cell -Free DNA as Inflammatory Marker in Egyptian Psoriasis Patients
- Author
-
Haneya A A, Anani, Amany M, Tawfeik, Soheir S, Maklad, Abeer M, Kamel, Enas E, El-Said, and Asmaa S, Farag
- Subjects
Psoriasis Severity Index ,psoriasis therapy ,circulating cell -free DNA ,Original Research ,C-reactive protein - Abstract
Background Cell lesion and apoptosis with release of cell -free DNA (CFD) in circulation are associated with chronic inflammation of psoriasis. Objective The objective of this study was to determine the CFD concentrations in sera of patients with psoriasis, to assess its relationship with disease severity as defined by Psoriasis Area Severity Index (PASI) and other inflammatory biomarkers (C-reactive protein (CRP) and erythrocyte sedimentation rate (ESR)) levels, and to monitor the efficacy of treatment. Patients and Methods Thirty adult patients with different types of psoriasis (25 vulgaris; 10 mild, 15 moderate and 5 erythroderma; severe) were evaluated during the exacerbation phase of the disease, before starting (T0) and after 12 weeks (T12) of treatment with topical therapy for mild cases, narrowband-ultraviolet light B (NB-UVB) for moderate cases and methotrexate for severe cases. Twenty healthy controls were also involved in the study. The concentrations of CFD in sera were measured before and after treatment by quantitative real time PCR (qPCR) using primers of the human β -globin gene. Results At T0, all patients presented significant higher levels of ESR (P=0.05) and CFD (P=0.001) compared with controls. Highly significant elevations of all parameters were observed in severe disease (erythroderma) compared to mild/moderate disease (vulgaris). Methotrexate treatment induced highly significant reductions in all inflammatory markers including CFD (P= 0.042) while topical and UV irradiation therapies had no effects. CFD concentrations showed positive correlations with both PASI (r=0.422, P=0.020) and ESR (r=0.321, P=0.023) only before the start of treatment. Conclusion The level of circulating CFD could be used to monitor psoriasis severity. However, its level cannot be stated for the treatment, except in severe erythrodermic patients upon successful treatment with methotrexate. We recommend validation of a convenient and accurate DNA assay applied directly to biological samples which does not require prior DNA extraction and amplification.
- Published
- 2019
10. Potential risk factors associated with ill-thrift in buffalo calves (Bubalus bubalis) raised at smallholder farms in Egypt
- Author
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Waleed E. El-said, Mohamed A. Ali, and Sabry A. El-Khodery
- Subjects
medicine.medical_specialty ,Epidemiology ,Logistic regression ,Buffalo calves ,Animal science ,medicine ,General ,lcsh:Science (General) ,lcsh:R5-920 ,Multidisciplinary ,Ill-thrift ,biology ,Potential risk ,business.industry ,Odds ratio ,biology.organism_classification ,Confidence interval ,Diarrhea ,Risk factors ,Original Article ,Egypt ,Bubalus ,medicine.symptom ,Emaciation ,business ,lcsh:Medicine (General) ,lcsh:Q1-390 - Abstract
Failure to grow (ill-thrift) in calves has a negative effect on animal production and health. The present study was carried out from November, 2009 to May, 2013 to investigate the risk factors of ill-thrift in buffalo calves. A total of 344 calves at 78 smallholder farms were selected randomly. A questionnaire was designed to include managemental, nutritional and disease risk factors. Serum selenium, copper, zinc, iron, calcium, phosphorus and magnesium were measured. Data were subjected to logistic regression analysis and results were expressed as p value, odds ratio (OR) and confidence interval (CI). Fifty-five calves (15.9%) showed ill-thrift. On animal level, the final multivariate logistic regression model showed a significant association between ill-thrift and early weaning (p
- Published
- 2015
11. Anti-Cancer Activity of Curcin and Latex Isolated from Jatropha Plant (Jatropha Curcas L.).
- Author
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Ahmed, A. M., Ibrahim, M. M., E El-said, M. A. A., and Elsadek, Bakheet E. M.
- Subjects
JATROPHA ,LATEX ,HEPATOCELLULAR carcinoma ,OILSEEDS ,CELL lines ,OXIDATIVE stress - Abstract
Copyright of Journal of Agricultural Chemistry & Biotechnology is the property of Egyptian National Agricultural Library (ENAL) and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)
- Published
- 2020
- Full Text
- View/download PDF
12. Retinol-binding protein 4, leptin, and insulin resistance in idiopathic hirsutism and hirsute women with polycystic ovary syndrome
- Author
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Mervat E.S. Al-Wakeel, Rasha A.H. El-Barbary, Fayza Ahmad, and Enas E. El-Said
- Subjects
medicine.medical_specialty ,Retinol binding protein 4 ,biology ,business.industry ,Leptin ,Dermatology ,medicine.disease ,Polycystic ovary ,Idiopathic hirsutism ,Endocrinology ,Insulin resistance ,Internal medicine ,medicine ,biology.protein ,business - Published
- 2013
13. A foldable textile-based broadband archimedean spiral rectenna for RF energy harvesting
- Author
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Menna A. El Shorbagy, Maha A. El Feshawy, Hany F. Hammad, Randa M. El Khosht, Monica N. Farag, Ahmed E. El Said, and Amr T. Abdel-Hamid
- Subjects
Spiral antenna ,010407 polymers ,Engineering ,Voltage doubler ,business.industry ,Electrical engineering ,Impedance matching ,020206 networking & telecommunications ,02 engineering and technology ,01 natural sciences ,0104 chemical sciences ,Rectenna ,Balun ,0202 electrical engineering, electronic engineering, information engineering ,SMA connector ,Antenna (radio) ,business ,Energy harvesting - Abstract
In this work, a new Broadband RF energy harvesting system is introduced, employing an Archimedean spiral antenna, a 6-stage voltage doubler, and a DC-DC converter. The proposed system operates over a frequency range from 0.9 GHz to 4 GHz. A balun is used to feed the antenna and is connected to the rectifying circuit via an SMA connector. The spiral antenna is fabricated using Conductive Shieldit super and Felt for the substrate. Also, other textile materials were used such as: Stainless steel threads for the conductive layer and Fleece for the substrate. The measured rectified DC voltage had a peak of 1.5V when testing outdoors, and was 0.5 V when testing indoors. The overall system efficiency was approximately 30%.
- Published
- 2016
14. Efflux Pump Contribution to Multidrug Resistance in Pseudomonas Aeruginosa and the Effect of Using an Efflux Pump Inhibitor on Ciprofloxacin Resistance
- Author
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Doaa M. Zakaria, Amany M. Tawfiek, Hoda A. Ebrahem, Hania A. Ali, Salwa R. Ali, Naglaa F. Abd El Haliem, and Enas E. El-Said
- Subjects
Multiple drug resistance ,Ciprofloxacin resistance ,Chemistry ,Pseudomonas aeruginosa ,medicine ,Efflux ,medicine.disease_cause ,Microbiology - Published
- 2012
15. Neutrophil CD64 in diagnosis of infection in systemic lupus erythematosus patients
- Author
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Salwa R. Ali, Enas E. El-Said, and Fawzia A. El-Sheshtawy
- Subjects
CD64 ,medicine.diagnostic_test ,business.industry ,Neutrophil cd64 ,Signs and symptoms ,Disease ,Flow cytometry ,immune system diseases ,Erythrocyte sedimentation rate ,Immunology ,Medicine ,Major complication ,skin and connective tissue diseases ,business ,Cause of death - Abstract
Background: Infection is one of the major complications as well as cause of death in systemic lupus erythematosus patients (SLE). Differentiation between early infection and disease flare in these patients is often clinically difficult because both have similar signs and symptoms. Aim: To evaluate CD64 expression on neutrophils as an early marker that can discriminate between infection and disease flare in SLE patients. Also, its clinical utility in comparison with traditional laboratory tests used for detecting infection will be studied. Methods: The study included 38 subjects; 10 apparently healthy individuals as healthy controls and 28 SLE patients divided into three groups (10 SLE patients with infection, 10 SLE patients with flare and 8 SLE patients without infection or flare). CD64 on neutrophils was measured using flow cytometry. Total leucocytic count, erythrocyte sedimentation rate and high-sensitive C-reactive protein were also measured. Results: The median of the percentage of neutrophils expressing CD64 was higher in all SLE patients compared to normal control. It was significantly higher in SLE patients with infection than those with disease activity (P
- Published
- 2010
16. EFFECT OF BORON FOLIAR APPLICATION AND DIFFERENT COMBINATIONS OF MINERAL AND ORGANIC NITROGEN FERTILIZATION ON GROWTH, CHEMICAL COMPOSITION AND YIELD OF SWEET PEPPER (Capsicum annuum L.)
- Author
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M. E. EL-Said
- Subjects
medicine.medical_treatment ,Carotene ,food and beverages ,chemistry.chemical_element ,engineering.material ,Nitrogen ,chemistry.chemical_compound ,Horticulture ,Human fertilization ,chemistry ,Dry weight ,Chlorophyll ,Pepper ,engineering ,medicine ,Fertilizer ,Boron - Abstract
Two field experiments were performed at El-Baramon, Experimental Station, Dakahlia Governorate, Egypt, during the successive seasons of 2007 and 2008 to study the effect of boron foliar nutrition and different combinations of mineral and organic nitrogen fertilization on growth, chemical composition and yield of sweet pepper cv. California wonder. The main results could be summarized that: 1- Foliar application of boron at 100 ppm and fertilization with 75% mineral nitrogen fertilizer + 25% organic nitrogen resulted significasnt increase of plant height, number of branches, fresh and dry weight. 2-The highest significant values of A, B, total chlorophyll and carotene as well as N, P, K and Ca contents in sweet pepper plant leaves were obtained with foliar addition of boron at 100 ppm and fertilization with 75% mineral nitrogen + 25% organic nitrogen. 3- Fruit sitting percentage, number of fruits per plant, average fruit weight, fruit yield per plant and total yield per feddan were significantly increased as a result of foliar addition with boron at 100 ppm and fertilization at level of 75% mineral nitrogen fertilizers + 25% organic nitrogen. 4- Foliar nutrition of boron at 100 ppm and fertilization by 75% mineral nitrogen + 25% organic nitrogen significantly increased fruit length, fruit diameter, fruit flesh thickness, fruit dry weigh and TSS as well as vit C. In general, this study demonstrated that it is possible to produce highest growth, yield and quality of sweet pepper fruits by foliar application with boron at 100 ppm and fertilization using 75% from the recommended dose as mineral nitrogen plus 25% from the recommended dose as organic nitrogen.
- Published
- 2009
17. A COMPARATIVE STUDY FOR IMPACT OF LOW PHOSPHORUS FERTILIZATION IN DIFFERENT COMBINATIONS WITH SULPHUR, GYPSUM AND PHOSPHOREIN ON TOMATO GROWTH, MINERAL STATUS AND PRODUCTIVITY
- Author
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M. E. EL-Said
- Subjects
Gypsum ,Phosphorus ,Amendment ,Randomized block design ,chemistry.chemical_element ,engineering.material ,Phosphate ,chemistry.chemical_compound ,Animal science ,chemistry ,Dry weight ,Phosphorite ,Shoot ,engineering - Abstract
Two field experiments were conducted at Kalabshow district, Dakahlia Governorate during two successive summer seasons of 2007 and 2008 to study the effect of phosphorus fertilizers,i.e., super phosphate and rock phosphate in different combination with gypsum, sulphur and phosphorein on growth ,mineral composition and productivity of tomato cv. Super marmand . The experiment included fourteen treatments arranged in randomized complete block design. The treatments contained two sources of phosphorus (P) fertilizers [super phosphate (SP) and rock phosphate (RP) at 100% from recommended dose (RD),i.e,75KgP2O5] and different combination of SP or RP at low rate (65%),i.e,52.5 KgP2O5 of RD) with gypsum (G),sulphur (S)and phosphorein(Phn). The main results were as follows: 1- Addition of super phosphate(SP) at 65 % of the recommended phosphorus rate(RD) with gypsum(G) and phosphorein(Phn) as soil amendment had a significant effect on number of leaves per plant, plant height , roots& shoots and total dry weights per plant as well as relative dry weight (%)during the two seasons. 2-Application of rock phosphate (RP) at 65 % of the recommended phosphorus rate RD) resulted in significant decrease of foliage concentration of N and P as well as the N, P ,K total uptake from N,P,K in both seasons. 3- The highest significant N and P concentration and N, P and K uptake were resulted from application of super phosphate (SP) at 65 %from RD in the presence of gypsum (G) and phosphorein (Phn) at both seasons. 4- Addition of the recommended phosphorus rate as super phosphate(SP) or applying (SP) at 65% from RD with gypsum and phosphorein showed the most superior effect regarding average fruit weight, number of fruits and fruit yield of tomato plant as well as total yield per feddan. 5- Application of super phosphate (SP) at 65 %with gypsum (G) and phosphorein (Phn) resulted in 6.45 % increment in the total yield comparing to the control treatment (average of the two seasons) . 6- Applying super phosphate (SP) at 65% from RD with gypsum (G) and phosphorein (Phn) showed the superior significant values for most fruit quality, i.e., T.S.S %, Vit C and total carbohydrates content of tomato fruits. In general, this study demonstrated that it is possible to produce highest growth, yield and quality of tomato plants by applying super phosphate at 65 % of the recommended phosphorus rate with 2.5 ton/feddan of gypsum and 1 kg/feddan of phosphorein. Moreover, the phosphatic fertilization can be reduced by 35 % of the recommended rate beside reduction of chemical pollution.
- Published
- 2009
18. Hypothyroidism in Male Rats of Different Ages Exposed to Nitrate Polluted Drinking Water
- Author
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Abeer E. El-Said, Azza M. El-Wakf, Fahmy G. Elsaid, and Hanaa A. Hassan
- Subjects
medicine.medical_specialty ,Triiodothyronine ,Globulin ,biology ,Chemistry ,Thyroid ,Urine ,chemistry.chemical_compound ,Endocrinology ,medicine.anatomical_structure ,Nitrate ,Thyroid-stimulating hormone ,Sodium nitrate ,Internal medicine ,Toxicity ,medicine ,biology.protein - Abstract
The effect of nitrate pollution on the thyroid hormonal levels, body weight and other health indices was studied in male rats of different ages. The tested rats were divided into young (3 weeks old) and adult (12 weeks old) groups exposed to pollution via sodium nitrate (NaNO3) intake in drinking water in concentrations 100, 250, 550 mg/L daily for 4 months. The study revealed a dose dependent decrease in serum levels of thyroid hormones thyroxine (T4) and triiodothyronine (T3) accompanied by increased levels of thyroid stimulating hormone (TSH) in all nitrate exposed rats, indicating development of hypothyroidism. A significant reduction of the body weight gain was also recorded in the young animals at different nitrate doses, but only in the adults with the high dose. Meanwhile, a significantly elevated nitric oxide (NO) level in the serum and urine were noticed that confined to the young animals with medium (250 mg/ L) and high (550 mg/L) nitrate doses and the high dose adult animals. In addition, nitrate exposure resulted in a decreased serum concentrations of total proteins and protein fractions (albumin and globulin), accompanied by significant increases in the urea and creatinine levels in both serum and urine of the tested rats. This together with the above detected changes was found to exceed as the nitrate concentration increased and to be more pronounced in the young rats. Therefore, it can conclude that prolonged exposure to nitrate polluted drinking water is toxic to the thyroid hormonal activity and the other measured indices in both young and adult rats, but the young animals comprised the most age group susceptible to nitrate toxicity.
- Published
- 2008
19. A MODIFIED POWER FLOW METHOD FOR NON SYNCHRONOUS NETWORKS INTERCONNECTION
- Author
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H. El-Desouki, I. Bedir, M. E. El-Said, and K.M. Shebl
- Subjects
Power flow ,Interconnection ,Electric power system ,Computer science ,business.industry ,Path (graph theory) ,Electrical engineering ,Topology (electrical circuits) ,business ,Short circuit ,Voltage - Abstract
This paper presents an .efficient method for AC-DC power flow used in non- synchronous intercoihection. The proposed method treats the converter as voltage dependent loads and the variables are eliminated from the power flow equations. The method is successfully implemented to IEEE 5-bus test system interconnected with IEEE 14-bus test system. The technical conditions for interconnecting power systems, the short circuit capacity of AC connected b&, the geometrical topology of the land in DC link path, and location of AC bus from the generating stations, are considercd.
- Published
- 2000
20. Interpretation of Low-Level Plasmodium Infection Rates Determined by Elisa for Anophelines (Diptera: Culicidae) from Egyptian Oases
- Author
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S. E. el Said, C. R. Roberts, J. C. Beier, C. M. Asiago, and Mohamed A. Kenawy
- Subjects
Plasmodium falciparum ,Plasmodium vivax ,Enzyme-Linked Immunosorbent Assay ,Plasmodium ,law.invention ,Theobald ,law ,Anopheles ,parasitic diseases ,medicine ,Animals ,General Veterinary ,biology ,Anopheles sergentii ,medicine.disease ,biology.organism_classification ,Virology ,Insect Vectors ,Malaria ,Infectious Diseases ,Transmission (mechanics) ,Insect Science ,Vector (epidemiology) ,Protozoa ,Egypt ,Parasitology - Abstract
Plasmodium infection rates determined by enzyme-linked immunosorbent assay (ELISA) were compared for Anopheles sergentii (Theobald) and An. multicolor Cambouliu in Siwa Oasis, Egypt, an area with low-level Plasmodium vivax transmission, and in Bahariya and Farafra, two other Egyptian oases which appear to be free of malaria. Initial testing indicated that 4.4% (23 of 518) and 0.8% (4 of 518) of the An. sergentii were positive for P. vivax and P. falciparum , respectively, and that 1.4% (1 of 71) of the An. multicolor were positive for P. falciparum . However, after two confirmational tests, only 1.2% (6 of 518) of the An. sergentii remained consistently positive for P. vivax . Initial ELISA absorbance was not a useful predictor of potential false positive reactions in the P. vivax assay. Paradoxically, the six ELISA-positive An. sergentii were from the two malaria-free oases. This study raises the question of whether ELISA-positive reactions for anopheline vector species provides unequivocal evidence for transmission in areas of low malaria endemicity.
- Published
- 1990
21. Assessment of microplastics in human stool: A pilot study investigating the potential impact of diet-associated scenarios on oral microplastics exposure.
- Author
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Hartmann C, Lomako I, Schachner C, El Said E, Abert J, Satrapa V, Kaiser AM, Walch H, and Köppel S
- Subjects
- Humans, Pilot Projects, Diet statistics & numerical data, Adult, Dietary Exposure statistics & numerical data, Dietary Exposure analysis, Environmental Monitoring, Environmental Exposure statistics & numerical data, Environmental Exposure analysis, Plastics analysis, Male, Microplastics analysis, Feces chemistry
- Abstract
As emerging contaminants microplastic particles have become of particular relevance as they are widely present in the environment and of potential concern to human health. Humans are exposed through different routes, with oral intake and inhalation being the most significant. Dietary intake substantially contributes to oral exposure, although data is still lacking. This first-of-its-kind pilot study investigates the influence of different plastic use and food consumption scenarios (normal, low, high) on microplastic content in stool reflecting oral intake by performing an intervention study with fifteen volunteers. Stool samples were analyzed for ten different plastic types in three size fractions including 5-50 μm (qualitative), 50-500 μm and 500-5000 μm (quantitative). In all samples, microplastic particles were detected with median concentrations up to 3.5 particles/g stool in the size fraction 50-500 μm. Polyethylene was the most frequently detected polymer type. The different scenarios did not result in a consistent pattern of microplastics, however, the use of plastics for food packaging and preparation, and the consumption of highly processed food were statistically significantly associated with microplastics content in stool. These results provide initial findings that contribute to filling current knowledge gaps and pave the way for further research., Competing Interests: Declaration of competing interest The authors declare the following financial interests/personal relationships which may be considered as potential competing interests: Environment Agency Austria as institution (contract work) reports financial support was provided by Plastics Europe AISBL. Environment Agency Austria as institution (contract work) reports a relationship with Plastics Europe AISBL that includes: funding grants. Our study received funding from Plastics Europe AISBL as part of its Brigid research project. If there are other authors, they declare that they have no known competing financial interests or personal relationships that could have appeared to influence the work reported in this paper., (Copyright © 2024 The Authors. Published by Elsevier B.V. All rights reserved.)
- Published
- 2024
- Full Text
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22. Transforming Health Care Landscapes: The Lever of Radiology Research and Innovation on Emerging Markets Poised for Aggressive Growth.
- Author
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Davis NM, El-Said E, Fortune P, Shen A, and Succi MD
- Subjects
- United States, Humans, Precision Medicine, Delivery of Health Care, Biomedical Research, Health Care Sector, Forecasting, Radiology, Artificial Intelligence
- Abstract
Advances in radiology are crucial not only to the future of the field but to medicine as a whole. Here, we present three emerging areas of medicine that are poised to change how health care is delivered-hospital at home, artificial intelligence, and precision medicine-and illustrate how advances in radiological tools and technologies are helping to fuel the growth of these markets in the United States and across the globe., (Copyright © 2024 American College of Radiology. Published by Elsevier Inc. All rights reserved.)
- Published
- 2024
- Full Text
- View/download PDF
23. Effectiveness and biochemical impact of ozone gas and silica nanoparticles on Culex pipiens (Diptera: Culicidae).
- Author
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Salem HHA, Mohammed SH, Eltaly RI, Elqady EM, El-Said E, and Metwaly KH
- Subjects
- Animals, Glutathione Transferase metabolism, Antioxidants pharmacology, Insecticides pharmacology, Glutathione Peroxidase metabolism, Catalase metabolism, Silicon Dioxide chemistry, Culex drug effects, Ozone pharmacology, Nanoparticles chemistry, Larva drug effects
- Abstract
Culex pipiens (Diptera: Culicidae) is a vector of many serious human diseases, and its control by the heavy use of chemical insecticides has led to the evolution of insecticide resistance and high environmental risks. Many safe alternatives, such as ozone gas (O
3 ) and silica nanoparticles (silica NPs) can reduce these risks. Therefore, O3 and silica NPs were applied to 3rd larval instars of Cx. pipiens at different concentrations (100, 200, and 400 ppm) for different exposure times (1, 2, 3, and 5 min for O3 and 24, 48, and 72 h for silica NPs). The activity of some vital antioxidant enzymes as well as scanning electron microscopy of the body surface were also investigated. A positive correlation was observed between larval mortality % and the tested concentrations of O3 and silica NPs. O3 was more effective than silica NPs, it resulted in 92% mortality at 400 ppm for a short exposure time (5 min). O3 -exposed larvae exhibited a significant increase in glutathione peroxidase, glutathione S-transferase, and catalase activities as well as the total antioxidant capacity. Scanning electron microscopy showing disruptive effects on the body surface morphology of ozone and silica NPs treated larvae. These results provide evidence that O3 and silica NPs have the potential for use as alternative vector control tools against Cx. pipiens., (© 2024. The Author(s).)- Published
- 2024
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24. New prospective insecticidal agents based on thiazolo[4,5-b]quinoxaline derivatives against cotton leafworm Spodoptera litura (Fabricius): Design, synthesis, toxicological, morphology, histological, and biomedical studies.
- Author
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Ragab A, Elsisi DM, Elqady EM, El-Said E, Salem MA, Ammar YA, and Abusaif MS
- Subjects
- Animals, Thiazoles chemistry, Insecticides chemical synthesis, Insecticides pharmacology, Insecticides toxicity, Insecticides chemistry, Quinoxalines toxicity, Quinoxalines pharmacology, Quinoxalines chemical synthesis, Quinoxalines chemistry, Larva drug effects, Spodoptera drug effects, Spodoptera growth & development
- Abstract
In this study, a new series of thiazolo[4,5-b]quinoxaline derivatives 3-8 were synthesized by treating 2,3-dichloroquinoxaline with thiosemicarbazone and thiourea derivatives under reflux conditions. The chemical structure of the newly designed derivatives was conducted using spectroscopic techniques. The insecticidal bioassay of the designed derivatives was evaluated against the 2nd and 4th larvae of S. litura after five days as toxicity agents via median lethal concentration (LC
50 ) and the lethal time values (LT50 ). The results indicated that all the tested compounds had insecticidal effects against both instar larvae of S. litura with variable values. Among them, thiazolo[4,5-b]quinoxaline derivative 3 was the most toxic, with LC50 = 261.88 and 433.68 ppm against 2nd and 4th instar larvae, respectively. Moreover, the thiazolo[4,5-b]quinoxaline derivative 3 required the least time to kill the 50% population (LT50 ) of 2nd larvae were 20.88, 13.2, and 15.84 hs with 625, 1250, and 2500 ppm, respectively, while for the 4th larval instar were 2.75, 2.08, and 1.76 days with concentrations of 625, 1250, and 2500 ppm, respectively. Larvae's morphological and histological studies for the most active derivative 3 were investigated. According to SEM analysis, the exterior morphology of the cuticle and head capsule was affected. In addition, there were some histological alterations in the cuticle layers and the midgut tissues. Columnar cells began breaking down, and vacuolization occurred in the peritrophic membrane. Moreover, treating 4th S litura larvae hemolymph with compound 3 showed significant changes in biochemical analysis, such as total proteins, GPT, GOT, acetylcholinesterase (AChE), and alkaline phosphatase (AlP). Finally, the toxicity prediction of the most active derivative revealed non-corrosive, non-irritant to the eye, non-respiratory toxicity, non-sensitivity to the skin, non-hepatotoxic, and don't have toxicity on minnow toxicity and T. pyriformis indicating a good toxicity profile for human., Competing Interests: Declaration of competing interest The authors declare that they have no known competing financial interests or personal relationships that could have appeared to influence the work reported in this paper., (Copyright © 2024 Elsevier Inc. All rights reserved.)- Published
- 2024
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25. Biosynthesized silver nanoparticles (Ag NPs) from isolated actinomycetes strains and their impact on the black cutworm, Agrotis ipsilon.
- Author
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Abou El-Enain IM, Elqady EM, El-Said E, Salem HHA, Badr NF, Abd-Allah GE, and Rezk MM
- Subjects
- Animals, Actinomyces, Spectroscopy, Fourier Transform Infrared, Silver toxicity, Larva, Plant Extracts pharmacology, Anti-Bacterial Agents pharmacology, Metal Nanoparticles toxicity, Metal Nanoparticles chemistry, Actinobacteria
- Abstract
Nanomaterials have been produced with the use of bio-nanotechnology, which is a low-cost approach. Currently, research is being conducted to determine whether actinomycetes isolated from Egyptian soil can biosynthesize Ag nanoparticles (Ag NPs) and characterized by using the following techniques: Transmission electron microscopy (TEM), Dynamic light scattering (DLS), Fourier transforms infrared (FT-IR), Energy-dispersive X-ray spectroscopy (EDX), UV-Vis spectroscopy and X-ray diffraction (XRD). The most promising actinomycetes isolate were identified, morphologically, biochemically, and molecularly. Streptomyces avermitilis Azhar A.4 was found to be able to reduce silver metal nanoparticles from silver nitrate in nine isolates collected from Egyptian soil. Toxicity of biosynthesized against 2nd and 4th larval instar of Agrotis ipsilon (Hufn.) (Lepidoptera: Noctuidae) was estimated. In addition, activity of certain vital antioxidant and detoxifying enzymes as well as midgut histology of treated larvae were also investigated. The results showed appositive correlations between larval mortality percentage (y) and bio-AgNPs concentrations (x) with excellent (R
2 ). The 4th larval instar was more susceptible than 2nd larval instar with LC50 (with 95% confirmed limits) =8.61 (2.76-13.89) and 26.44(13.25-35.58) ppml-1 , respectively of 5 days from treatment. The initial stages of biosynthesized AgNps exposure showed significant increases in carboxylesterase (CarE) and peroxidases (PODs) activity followed by significant suppression after 5 days pos-exposure. While protease activity was significantly decreased by increasing time post-exposure. Midgut histology showed abnormality and progressive damage by increasing time post exposure leading to complete destruction of midgut cells after 5 days from exposure. These results make biosynthesized AgNPs an appropriate alternative to chemical insecticide in A. ipsilon management., (Copyright © 2023. Published by Elsevier Inc.)- Published
- 2023
- Full Text
- View/download PDF
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