نتایج جستجو برای: 1 inorganic p concentrations was as follows apatite ca10
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Hydroxyapatite (HA), which is represented by the formula Ca10(PO4)6(OH)2, is one of the inorganic components of the hard tissues of living bodies such as bones, teeth, etc. HA is a calcium phosphate-based bioceramic, which has been used in medicine and dentistry for more than 20 years because of its excellent biocompatibility with human tissues. The precipitation process, considered here, ...
Laboratory scale studies have repeatedly reported high P-retention in slag, a by-product of the steel manufacturing industry. Thus, it has emerged as a potential material to increase P-removal from constructed wetlands (CWs). However, several limitations were highlighted by field experiments, including the high pH of treated water and clogging. We hypothesized that the addition of sedimentary r...
In this work, we have calibrated the infrared (IR) method for determining OH concentrations in apatite with absolute concentrations obtained through elastic recoil detection (ERD) analysis. IR spectra were collected on oriented, single-crystal apatite samples using polarized transmission infrared spectroscopy. The weight percent H2O is 0.001199 ± 0.000029 (the error is given at 1σ level hereaft...
a significant problem in multicarrier communication systems is the necessity to reduce the value of papr (peak-to-average power ratio) of transmitting signal. in this thesis we study the effect of the system parameters such as coding and modulation types on papr and ultimate ber in a mc-cdma system. in this study we consider fading channel as well as the nonlinearity of transmitter’s amplifier ...
Hydroxyapatite is chemically related to the inorganic component of bone matrix as a complex structure with the formula of Ca10(OH)2(PO4)6. Previous studies have reported the application of microsized hydroxyapatite to bone regeneration, but the result is not satisfied. The limitation comes from the size of hydroxyapatite. In addition, the duration of treatment is very long. The advantages of hy...
Bioactive glass with composition SiO2, Na2O, CaO, P2O5 with MgO additive were synthesized through a quick alkali mediated sol–gel method. MgO was substituted for SiO2 in glass formula up to 5 wt% and in-vitro bioactivity of the samples (precipitation behavior of carbonated apatite likely bone layer) was evaluated by soaking them in simulated body fluid (SBF). The characterizations were carried ...
Herein we report a method to functionalize in vitro grown insulin amyloid fibrils with various inorganic materials. The counterion of the positively charged amyloid fibril is exchanged with anions from various salts; subsequent addition of appropriate cations results in functionalization of the amyloid fibril. We demonstrate the formation of apatite and platinum complex structures ordered by th...
iv abstract this study examined the linguistic behaviors of two iranian efl teachers each of them teaching learners of two similar proficiency levels, a beginner level and an intermediate level, to investigate the relationship between the learners proficiency levels and the amounts and purposes for l1 use by the two teachers. the study was carried out to investigate whether there were differe...
the present study was carried on to investigate the use of face-keeping strategies in reaction to complaints by male and female in two different cultures, persian and american english. to see if apology strategies are affected by cultural, contextual preferences and gender of interlocutors in two distinct languages of persian and american english. the hypotheses to be tested were 1) ifids, acce...
Phosphate ore is a non-renewable resource, so finding replacement necessary. Municipal sludge has significant recycling potential because of its high phosphorus content and large discharge characteristics. The migration transformation in municipal treated with different concentrations HCl were studied using the standards, measurements, testing extraction protocol from two aspects: complexation ...
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