OALib Journal期刊

ISSN: 2333-9721




2019 ( 15 )

2018 ( 189 )

2017 ( 167 )

2016 ( 243 )


匹配条件: “El-Ghamry Hanaa” ,找到相关结果约13131条。
Effect of various penetration enhancers concentrations on diclafenac sodium release from cellulose acetate phthalate polymeric film
El-Nahas Hanan,Fakhry Ghazy,El-Ghamry Hanaa,Sabry
Asian Journal of Pharmaceutics , 2011,
Abstract: An investigation was conducted to evaluate the influence of different penetration enhancers in various concentrations on the release of diclofenac sodium (DFS) as a water-soluble drug from Cellulose acetate phthalate polymeric films containing 50% w/w PEG 600 as plasticizer, to choose the most appropriate enhancer and its optimum concentration to be used to achieve the maximum release and permeation of the drug. The addition of various enhancers, as isopropylmyristate (IPM; 0.2_5% w/w), oleic acid (OA; 0.2_5% w/w) and linoleic acid (LOA; 0.2_5% w/w), Tween 80 (T80;1_10% w/w) and transcutol, (TC; 1_10% w/w) enhanced the DFS release from the polymeric films. The enhancement ratio of the penetration enhancers used in the formulation of DFS were found to increase in the order of IPM>LOA>OA>T80>TC. (56.2, 54.1, 50, 48.7 and 48%, respectively). In vitro permeation studies were performed using rabbit abdominal skin as the permeating membrane. The results indicated that maximum permeation was obtained at 24hrs (0.5% IPM, 0.2% LOA, 1% OA, 0.5% T80 and 10% TC, increased skin permeation of DFS by 4.46, 4.06, 3.37, 1.65 and 1.49 time, respectively). IPM was found to be the most efficient enhancer. The results obtained from ANOVA test indicate that the difference in drug permeation rates is highly significant compared to the control formulation (P<0.05). The mechanism of drug release from the polymeric films obey Higuchi′s model.
Effect of Organic Residues on Soil Microbial Biomass in Different Egyptian Soils
A.M. El-Ghamry
Pakistan Journal of Biological Sciences , 2001,
Abstract: A green house experiment was conducted to compare the effects of different organic residues on soil microbial biomass C (Cmic) , N (Nmic) and their ratios with total C (Corg) and N (Ntotal) in different soils. Three types of organic residues used were farmyard manure (FYM), town refuse (TR), and sewage sludge (SS), applied separately in sandy, calcareous, and alluvial soils in various concentrations of 10t/fed, 20t/fed, and 30t/fed (1fed=0.42ha). Wheat plants were harvested after 6 weeks and the soils were analyzed for Cmic, Nmic, Corg, Ntotal and pH. The addition of organic residues significantly increased the size of soil microbial biomass. The biomass C and N (Cmic & Nmic) increased consistently with increasing levels of the organic residues in the soil. The FYM was found to be more effective than TR and SS in increasing microbial biomass and this sequence was observed in all the soils used. Similarly, addition of organic residues also caused significant stimulation in Corg and Ntotal in all soils. Also, the ratios of Cmic/Nmic, Cmic/Corg percentage and Nmic/Ntotal percentage were increased with increasing levels of organic residues. The soil pH was decreased significantly with the higher rates of application in all the treatments (FYM, TR, and SS) but remained unaffected at lower rates. The linear regression between different ratios under different levels of organic residues application was also calculated.
Comparison of Sewage Sludge and Town Refuse as Soil Conditioners for Sandy Soil Reclamation
E. M. El-Naggar,A. M. El-Ghamry
Pakistan Journal of Biological Sciences , 2001,
Abstract: A pot experiment was carried out to compare the effects of sewage sludge (S) and town refuse(T) additions on plant growth and yield components of wheat (Triticum sativa L.), some soil physico - chemical properties and available nutrients in reclaiming sandy soil. The organic residues were applied at rates of 5%, 10%, and in different combinations with N, P, K mineral fertilizers. The addition of sewage sludge, town refuse and their interactions at low rates produced the striking changes in sandy soil. An improvement in soil physical and chemical properties was noticed with increasing addition of organic residues. Town refuse furnished better results than the sewage sludge. A significant increase in grain and straw yield of wheat and plant N, P, K content was found in organic residues treated soils as compared with the control. The treatment of T+NPK was better than the other treatments. A significant decrease in soil bulk density and increase in soil porosity and available NPK contents in soil was observed with organic residues as compared to the control. The investigation exhibited that town refuses were more affective than sewage sludge at different rates. The sewage sludge and town refuse can be used as soil conditioners to improve the soil health and hence the crop yield. At the same time this would help to reduce the environmental contamination.
Dibromido(2,3,9,10-tetramethyl-1,4,8,11-tetraazacyclotetradeca-1,3,8,10-tetraene)cobalt(III) bromide
Hoda El-Ghamry,Raafat Issa,Kamal El-Baradie,Shigeyuki Masaoka
Acta Crystallographica Section E , 2009, DOI: 10.1107/s160053680904166x
Abstract: In the title compound, [CoBr2(C14H24N4)]·Br, the CoIII ion is located on an inversion centre and possesses a distorted octahedral coordination geometry in which four nitrogen donors of the ligand molecule are in the equatorial plane and two Br ions occupy both the axial sites to give a trans isomer. The Br- counter- anion is also located on an inversion centre.
Hoda El-Ghamry,Raafat Issa,Kamal El-Baradie,Keiko Isagai
Acta Crystallographica Section E , 2008, DOI: 10.1107/s1600536808024239
Abstract: The title molecule, C17H13N5O4S, has a trans configuration with respect to the diazenyl (azo) group. The pyrimidine ring and the terminal benzene ring are inclined at angles of 89.38 (4) and 1.6 (6)°, respectively, with respect to the central benzene ring. The conformation of the molecule is in part stabilized by an intramolecular O—H...O hydrogen bond. In the crystal structure, molecules related through inversion centers form hydrogen-bonded dimers involving the sulfonamide N—H group and the N atom of the pyrimidine ring.
1-[4-(Diaminomethyleneaminosulfonyl)phenyliminiomethyl]-2-naphtholate N,N-dimethylformamide disolvate
Hoda El-Ghamry,Raafat Issa,Kamal El-Baradie,Keiko Isagai
Acta Crystallographica Section E , 2008, DOI: 10.1107/s1600536808018710
Abstract: The asymmetric unit the title compound, C18H16N4O3S·2C3H7NO, contains a molecule in a zwitterionic form with a deprotonated hydroxyl group and an iminium group, and two dimethylformamide solvent molecules. The dihedral angles of the guanidine group and the naphthyl ring system with respect to the central benzene ring are 76.04 (7) and 3.45 (9)°, respectively. The conformation of the molecule may be influenced, in part, by two intramolecular hydrogen bonds, while in the crystal structure, intermolecular hydrogen bonds form one-dimensional chains along [010].
Effects of Pesticides (Herbicides) on Soil Microbial Biomass - A Review
Abid Subhani,Ayman M. El-ghamry,Huang Changyong,Xu Jianming
Pakistan Journal of Biological Sciences , 2000,
Abstract: There are different factors that affect soil microbial biomass, including: soil factors (such as soil physical and chemical properties), soil environmental factors (such as temperature, moisture, pH etc.), and soil management factors (such as use of chemical fertilizers, heavy metals, pesticides, addition of organic matter, cultivation and crop rotation, seasonal variation, tillage, land use etc.). This review is mainly focusing on the pesticides particularly herbicides as a factor affecting the microbial biomass in different soils. The influence of herbicides on microbial biomass in different soils under different conditions has been reviewed. Herbicides have various effects associated with the type of herbicides, the concentration of the herbicides, the type of soils, and the conditions of the experiment (temperature, moisture, and the time of incubation etc.). The significance of these effects has been discussed.
The Influence of Synthetic Soil Conditioners on the Size of Soil Microbial Biomass in a Loamy Sand Soil
Ayman M. El-ghamry,Abid Subhani,Huang Changyong,Xu Jianming
Pakistan Journal of Biological Sciences , 2000,
Abstract: The effect of polyacrylamide (PAM) (synthetic soil conditioners) application on soil microbial biomass C (Cmic) and N (Nmic) were examined under laboratory conditions. Two types of polymers Acqua-Kept (P1) and Super-Hydro (P2) were mixed separately with a loamy sand soil in various concentrations of 25, 50, and 100 g g-1 soil. After 1, 7, 14 and 28 days of incubation, the soils were analyzed for Cmic and Nmic. The two PAMs have shown almost similar effects on the soil microbial biomass C and N. The amount of soil microbial biomass (Cmic and Nmic) was increased with the lower polymer applications of 25 and 50 g g-1 soil, while it decreased at the higher dose of 100 g g-1 soil addition. The response exhibited a parabolic curve. The response was found more pronounced with P2 than P1 application. A slight increase in Cmic and Nmic was observed with the advancement of incubation stages. The results indicate unpredictable changes in soil microbial biomass due to the application of different synthetic soil conditioners.
Effects of Copper Toxicity on Soil Microbial Biomass
Ayman M. El-Ghamry,Abid Subhani,Wael Mohd,Huang Changyong
Pakistan Journal of Biological Sciences , 2000,
Abstract: The wide utilization of copper in agriculture and industrial processes in addition to many other uses associated with human activities causes both point and non-point source pollution of the environment with copper. Although copper is relatively non-toxic to mammals and essential micronutrient necessary for a wide variety of prokaryotic and eukaryotic metabolic activities, is toxic to all organisms if present in elevated concentrations. Copper pollution in agricultural posing soils can adversely affect the living part of soil organic matter serious threat to sustained food and fiber production.
Integrated Effects of Bio and Mineral Fertilizers and Humic Substances on Growth, Yield and Nutrient Contents of Fertigated Cowpea (Vigna unguiculata L.) Grown on Sandy Soils
Magdi. T. Abdelhamid,E.M. Selim,A.M. EL-Ghamry
Journal of Agronomy , 2011,
Abstract: A bio-fertigation trial was conducted at the experimental farm of National Research Centre, Noubaria, Egypt during May to August of 2010 to study the relative efficacy of bio-fertigation of liquid formulation of N-fixer (Azospirillum sp. and Azotobacter sp.) and P-solubilizer (Basillus megatheriumion with bio fertigation and humic substances gave rather equal yield. Injection of 50% recommended dose NPK as drip fertigation in combination with biofertigation of liquid formulation and humic substances was better and comparable way than the other treatments. Bio fertigation of microbial inoculums and humic substances could be used as a complementary for mineral fertilizers to improve yield and quality of cowpea under sandy soil conditions which protect the environment chemical pollution and its harmful effect on human and animal health.

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