The pseudo- first order equation is of high R2 value as compared to the pseudo- second order equation, as shown in Table2. The results of the table show that the adsorption kinetics data are better represented by pseudo- first order model and the calculated qe value. This meaning that the first -order kinetics is higher compared to other models for AMX adsorption on
This can be explained through the result of the experiment. When the temperature is setted to 100 ºC, the K value of the specimen is 3.925kcal/(mh⁰C) .However, the K value of the specimen turn to a higher value at 9.174 kcal/(mh⁰C) once the set temperature is 200 ºC. Obviously, the K value is directly proportional to the temperature . Meanwhile, the different thickness of the SUS 304 also show an effect on the K value. The K value increases when the thickness of specimen decreases.
Iron(III) solution was added to the salicylic acid to form a organometallic complex. This makes use of the reaction between the phenol functional group in salicylic acid and ferric ions which allows for visibility due to its violet hue(1). The absorbance is directly proportional to the concentration of salicylic acids. This means that the higher the concentration of salicylic acid, the higher the amount of salicylate-iron complex formed, resulting in higher violet intensities and hence a higher absorbance, as seen from table 1. Since the Fe3+ ions react with the singular phenol functional group in salicylic acid, the amount of Fe3+ added should be in a 1:1 ratio with the concentration of salicylic acid.
These phenomena could be illustrated by the fact that once the flow rate was slow MB in the sample solution got more contact time with UV radiation induced. However, the flow rate of 25 mL/min was chosen to be the optimum because it makes the removal process higher. These results accord with the findings of Coelho et al. (2006), who investigated the photo-Fenton treatment of a petroleum refinery
0.5 mL of AuNPs solution was added to the above mixture. The UV-Vis spectra were recorded with a time interval of 1 min in a scanning range of 200-600nm at ambient temperature (25±20C). Antimicrobial activity The agar disc diffusion method was employed for the determination of antimicrobial activity of the papaya leaf extract stabilized gold nanoparticles. The 0.1 ml of 108cfu/ml of different pathogenic bacteria suspension was spread on different plates nourished with LB media. Filter paper discs (5 mm in diameter) were placed on the plates and synthesized AuNPs and papaya leaf extract solution were impregnated in different concentrations then onto the discs.
Under these conditions, the average hydrodynamic size was 620.3 nm is still higher than the primary particle size 2-3 nm and the deliberate zeta potential was -1.39 mV at pH 7, which indicates that increasing ionic strength leads to increasing hydrodynamic diameter. And also it suggests that at the highest investigated pH i.e. larger than 6 gave rise to the most negative zeta potential. These results are well correlated with the previous results. Gilbert et al., 18 who reported micron-sized
(2014) experimented on single layer drying of papaya with thickness of 3 mm in the ranges of 50-70°C inlet air temperature and 1 ± 0.2 m/s air velocity in a laboratory scale cabinet dryer. Papaya was dried to equilibrium moisture content within a time range of 210-390 min. The moisture transfer from papaya slices was discussed by applying the Fick’s diffusion model and the effective diffusivity changes between 1.27×10-9 and 3.78×10-9. Effective diffusivity increased with increasing temperature. The radical scavenging activity showed higher antioxidant activity by increasing temperature.
For comparison, a commercial MK of high purity was used and the strength development of Metakaolin concrete was evaluated using the K - value (efficiency factor). The produced Metakaolin as well as the commercial one imparted similar behaviour with respect to the concrete strength. Both conventional and commercial Metakaolins demonstrate very high K-values (close to 3.0 at 28 days) and are depicted as HR pozzolanic materials that may lead towards concrete production with an exceptional
Also requiring a tuned circuit adds cost. However this is only an issue for the very low cost broadcast receiver market. Some phase modulation and quadrature amplitude modulation formats have a higher spectral efficiency for data transmission that frequency shift keying, a form of frequency modulation. As a result, most data transmission system use PSK and QAM. The sidebands for an FM transmission theoretically extend out to infinity.
Due to minimum switching device it has a high efficiency. The limitations are the use of a larger filter capacitor and a large inductor than those of a buck regulator. 4.3.3 Buck- Boost Converter A buck boost converter provides an output voltage that may be less than the input voltage-hence the name “buck-boost” the output voltage polarity is opposite to that of the input voltage. This regulator is also known as an inverting regulator. The circuit arrangement of a buck-boost regulator is shown in fig4.4 Fig 4.4 Buck-Boost Converter (4.3) where LC is the critical value of the inductor.