RJABS January-April 2019

The Role of Vermicompost and Foliar Spray of Spirulina Platensis Extract on Vegetative Growth, Yield and Nutrition Status of Lettuce Plant under sandy soil

Yassen, A.A, Entsar M. Essa and Sahar M. Zaghloul

Abstract A field experiment was conducted during successive seasons at the experimental station of the National Research Centre in Nubaria region, Egypt to assess the effects of vermicompost and foliar spray of Spirulina platensis extract on vegetative growth, yield and nutrition status of lettuce plant.Results indicated that addition of vermicompost fertilizer at rates of (1, 2 and 3 ton fed-1), and foliar spray of spirulina platensis extract (1and 2 gL-1) within all tested treatments resulted had significant increases promoted growth characters, yieldand chemical composition (N, P, K, Fe, Zn, Mn, Cu, and vitamin C) in leaves and roots as compared to the control treatment.The highest valueapplication ofvermicompost at 2 ton fed-1+ foliar spray of spirulina platensis extract 2gL-1 in most growth characters plant height, fresh and dry matter of leaves, number of leaves,fresh and dry matter of rootsg andleaf area) and yield.In addition, data showed that decreasing vermicompost fertilizer and foliar spray of spirulina platensis extract reducedtotal carbohydrate content %in leaves.

[ FULL TEXT PDF 1-7 ] DOI:10.22587/rjabs.2019.14.1.1


Modern Developments of Polymer Blend/ Oxide Nanocomposites for Biomedical Applications as Antibacterial and Radiation Shielding Materials: A Review

Ahmed Hashim, Khalid H. H. Al-Attiyah, and Sroor Fadhil Obaid

Abstract The (polymer blend-oxide) nanocomposites are considered as promising materials in the fields of sensors, radiation shielding, antibacterial, thermal energy storage and release, piezoelectric, solar cells, diodes and other fields with low cost and lightweight. This review discusses the applications of (polymer blend-oxide) nanocomposites for radiation shielding, antibacterial. The results of studies showed that the (polymer blend-oxide) nanocomposites have good antibacterial activity. The antibacterial property depends on the concentration of oxide nanoparticles. Also, the (polymer blend-oxide) nanocomposites have high attenuation coefficients for high energy radiation.

[ FULL TEXT PDF 8-18 ] DOI:10.22587/rjabs.2019.14.1.2