The infrared spectra of xPbO (1−x−z)SiO2zP2O5 glasses with a PbO:SiO2 molar ratio of 3:2 and z=0,1,2,5,30,40 and 50 mol% have been examined in the region 4000-400 cm, together with XRD. The structure of PbO-SiO2 binary glass is significantly different from that of P2O5 substituted glasses. The low amount of P2O5 containing PbO-SiO2 glasses results in infrared spectra of the same pattern as 3:2 ...

Neutron diffraction and 31P nuclear magnetic resonance spectroscopy were used to probe the structure of phosphate glass biomaterials of general composition (CaO)0.5-x(Na2O)x(P2O5)0.5 (x = 0, 0.1 and 0.5). The results suggest that all three glasses have structures based on chains of Q2 phosphate groups. Clear structural differences are observed between the glasses containing Na2O and CaO. The P-...

Forage biomass production and water storage (WS) was evaluated in cactus pear cv. Gigante fertilized with combinations of nitrogen (10, 70, 100, 130, 190 kg ha−1 yr−1 N) phosphorus P2O5) annual (AH) biennial (BH) harvest frequencies, Quixadá Tejuçuoca, Brazil. A randomized complete block design used a split-plot arrangement four replications. In Quixadá, the maximum total forage (TFB) recorded ...

In the present work, effect of basicity at lower range from 0.98 to 2.13 on dephosphorization hot metal 1623 K was studied through high-temperature laboratorial experiments. With increase 2.13, P and C contents in rapidly decrease first, then gradually increase, respectively. From scanning electron microscopy-energy dispersive X-ray spectroscopy (SEM-EDS) diffraction (XRD) results, with basicit...

In order to study of the effect of seed inoculation with PGPR on nitrogen and phosphorus use efficiency of spring wheat in different levels of nitrogen and phosphorus fertilizers, an experimental was conducted at the Research Farm of Mohageh Ardabili University, Ardabil, Iran during 2012 year. The combination of nitrogen fertilizer in three levels (0, 40 and 80 kg N/ha as urea) and phosphorus f...

A field investigation was conducted at Agronomy research farm A. S. (P.G) College, Lakhaoti, Bulandshahr during rabi seasons of 2006 and 2007. The treatments consisted combination four cropping systems viz. chickpea sole (M1), linseed (M2), chickpea+ 2:1 ratio (M3) pigeonpea + 4:2 (M4) in main plots; two irrigations vegetative stages (30-40 days) flowering stage (70-75 (S1) one irrigation (S2) ...

This study aimed to evaluate the effects of nitrogen (N) and phosphorus (P) associated with dry rainy seasons on photochemical activity Opuntia ficus-indica (L.) Mill. cv. Gigante. Combinations N (10.0, 70.0, 100.0, 130.0, 190.0 kg ha−1 yr−1) P2O5 were evaluated in semi-arid regions. A completely randomized block design split-plot arrangement was adopted four replications. In Quixadá, [...]

This paper presents the influence of P2O5 incorporated in slag on hydration characteristics cement-slag system. It was found that gradual addition phosphorus oxide did not change overall mineralogy products. Except retardation dormant stage, chemically bound water and portlandite contents, degree slag, pore structure at all investigated ages were similar among pastes with different percentages....

Th e response of diff erent fertilizer doses was studied on the ratoon crop as well as main crop. Th e diff erent fertilizer doses under the study were F1 (N=90, P2O5 = 45, K2O=50, S=13, Zn = 4: in kg ha-1), F2 (N=105, P2O5 = 55, K2O=60, S=13, Zn = 4: in kg ha-1), F3 (N=120, P2O5 = 65, K2O=70, S=13, Zn = 4: in kg ha-1), F 4(N =135, P2O5 =75, K2O=80, S=13, Zn=4: in kg ha-1) and F5 (N=150, P2O5 =...

In the present work, the effect of the CaO/P2O5 ratio on the composition of sol-gel synthesized 58SiO2-(19 - x)P2O5-(23 + x)CaO (x = 0, 5, 10 and 15 mol%) glass samples was studied. Further, the effect of NBO/BO ratio on hydroxy carbonated apatite layer (HCA) forming ability based on dissolution behavior in simulated body fluid (SBF) solution was also investigated. CaO/P2O5 ratios of synthesize...