Hydrated Lime The results show that hydrated lime increased the intermediate temperature stiffness of the PG 64 - 22 binder. Hydrated lime showed to improve the fatigue properties of the aged binder. It could decrease the fatigue parameter by 23% which is a desired result when cracking due to aging is a concern. The mixing was done at three percentages: 1%, 2%, 3% . The lowest aging index was found to be at 2% by weight of the binder.
The results from the lab supported the initial hypothesis that catalase will have the highest reaction rate when exposed to a temperature around 37℃ as a reaction rate of 5 was obtained when catalase was at a temperature of 30℃. This lab explains the trend between temperature and reaction rate, as an enzyme’s activity will increase as temperature increases until it reaches the optimal temperature, in which case the activity will start to decrease. Theories like protein structures and intermolecular forces were justified by the results of this lab as well. Moreover, the activity levels of enzymes are greatly impacted by temperature and it should be further investigated through scientific applications with
Professor Petersen-Mahrt Svend of SEMM The European School of Molecular Medicine states that E. gracilis has a high sensitivity to environmental changes such as the change in pH levels (Petersen-Mahrt 1997). The pH level [of the environment] can directly distress the absorption of nutrients in marine environments. E. gracilis has been found to endure an expansive range [compared to] other algae (Danilov and Ekelund 2001). Through studies done by William J. Robbins, a botanist from Columbia University, E. gracilis has been found to grow best at a pH level of 3.0
Multicomponent inclusion complex also reduces amount of βCD required for complexation, thus reducing the formulation cost (16, 17). In our previous study it has been reported that the βCD alone increases the solubility of DOM by 2.2 folds where as ternary complex comprising of DOM, βCD and citric acid (CA) increases the solubility of DOM by 76 folds (18). Riebero et al. (2004) have reported that the quaternary inclusion complex (QIC) of a weakly basic drug such as vinpocetine, βCD, tartaric acid and water soluble polymers enhances the solubility of vinpocetine than the ternary complex involving vinpocetine, βCD and tartaric acid. It was found that the polymers increased the stability constant of QIC by co-complex formation (19).
Specifically, this investigation analyses how the initial temperature effects the rate of Hydrogen Peroxide oxidising Potential Acid Sulfate Soil. Only when a rapid reaction took place, PASS has been oxidised using Redox theory with the presence of pyrite or other sulphides to react. The hypothesis that the rate of oxidation is correlates with the initial temperature of the solution is true, with the theory being supported that the higher temperatures result in increased reaction speed. This lab test was conducted over two different depths of PASS, with three trials of five temperatures for each of the two depths. The first and most obvious form of evidence lays within the averaged pH levels over time.
Interestingly, the MICs observed for DMBQ was higher than those obtained for BQ, except when tested against B. cereus. This was due to an interesting effect of the methoxy identity of 1, 4-benzoquinones. The MIC determination of methoxybenzoquinone (MBQ) against S. typhimurium was found to be significantly lower than that of DMBQ (512 and 32 μg/mL, respectively). The difference in the number of methoxy groups in the 1, 4-benzoquinones significantly affected their antibacterial activities against the Gram-negative bacteria S. typhimurium and E. coli. Furthermore, hydroquinone (HQ), a reduced form of BQ, had significantly lower antibacterial activity than
All the samples exhibited type IV isotherm at high relative pressures (p/po), which is typical of meso-porous materials. There was a significant decrease in BET specific surface area and pore volume for alumina after metal impregnation. The specific surface area of alumina was found to be 190 m2/g while its pore volume was 0.1 cm3/g with a pore diameter of 9.8 nm. The surface area of Co/Al2O3 and Fe/Al2O3 was 180 m2/g and 165 m2/g, respectively. Pore volume and pore size of these catalyst samples were found to be less than those of the
By adding the additive, the amount of crack in the coating’s structure decreased; the lowest amount of cracks was observed for sample containing 3g/lit ion cobalt (Figure 1-d). The structure of phosphate crystals based on the obtained results is mainly in the form of plate and mud. Phosphate coatings containing additive have a more plate texture than phosphate coatings without additives, so that the most plate-shaped structure was observed for sample containing 3g/lit ions of cobalt. Therefore, changing the amount of plate-shaped structure based on surface morphology leads to an increase in the size of phosphate crystals for specimens containing cobalt additive . By adding the cobalt additive, the phosphate crystals formed on the zinc get more uniform and contain less porosity.
By leaving the acid and olefin in contact with no isobutane, polymerization occurred which increased acid consumption. After the shutdown, processing off-spec material also contributed to an increased acid consumption (see Figure 2, pg.4). Because of long residence times between the contactors and settlers, it will take time for the acid consumption to reduce to pre-shutdown levels. Acid spend strength has been higher than required for this period (see Figure 4, pg.5). Process Support recommends lowering the amount of fresh acid consumed to get closer to the spend target.
These results exceed those by Machtei et al in a study21 after 8 weeks when using repeated local application of FBP and CHX chips. The greater CAL gain in the present study might be associated with the greater intensity of the application of the chips which in turn results in higher local concentration of the drug that might be responsible for the greater effect. It has been demonstrated that PGE2 and TXB2 levels decreased and remained relatively constant from day 29 to day 50 with flurbiprofen administration in a study by Abramson et al.22 Similar results were confirmed by various authors20,21,23,24,25,26 where there were significant improvements in the values of CAL after administration of FBP and CHX chips. When the comparison was made between the groups, no statistically significant differences were seen in the values of PD and CAL at 1, 3 and 6 months in between the groups. This is in agreement with the study done by Machtei et
Nitrate reduction in the gram negative bacteria was conducted and when bacterium produce nitrate reductase when grown in a medium containing nitrate, the enzymes will convert the nitrate to nitrite. If nitrite is present the medium will turn red. This indicates a positive test (Goldman). If the bacterial is one of the few specials that can produce the enzyme Urase, this will be the key test that will separate this gram negative from all of the other possible candidates. Narrowing down the unknown microorganism to gram negative, this approach was helpful to take the next step, in some bacteria the cell wall is surrounded by cell enveloped called capsule, also some bacteria make capsule when faced in a harsh environment to protect them.
As seen in the trend of both buffer, once the pH is lower than 3, the slope of dv/dpH increase drastically, showing the decreasing effects of the buffer. On the other hand, in the trend of both buffer on the right side of graph shows when NaOH is added, the change in pH is more drastic once past about pH 5. Although buffer 1 and buffer 2 shows a similar trend, the plot of buffer 1 is above the plot of buffer 2. The reason for this is that buffer 1 is made by an acid and base with an almost equal concentration. This makes buffer 1 a greater buffer compared to buffer 2.