Reaction rate

The TG and DTA curves obtained for the compounds (C1-C5) are shown in Figure 9. Table 4 lists the results of the thermal studies of these compounds with the initial and final temperatures (ºC), assignments of each decomposition stage based on mass calculation and DTA peaks. These assignments (Δm - Calcd.) are based on the structural fragments from the theoretical formulae of the compounds (C1–C5). This implies that the groups proposed in the right column of Table 4 are not necessarily the…

Determination of Isoprenaline Hydrochloride Concentration Using Ultra Violet/ Visible Spectroscopy and Quantification of Sodium and Potassium Using Flame Spectroscopy Introduction In UV/VIS (ultraviolet-visible light) spectroscopy, light absorption as a function of various wavelengths gives data about electronic transitions within a solution [1]. The electronic transitions involve exciting an electron from one principle quantum state to another by the absorption of energy [2]. A change in…

A new, specific, rapid gas chromatography-mass spectrometry (GC-MS) method was described to identify and quantify pregabalin in human plasma. Silylation and acylation reaction were tried for derivatization of pregabalin before GC-MS analysis. Derivatization was achived using N-(tert-butyldimethylsilyl)-N-methyltrifluoroacetamide (MTBSTFA). Identification and quantification of a new derivative were performed in selected ion monitoring mode using electron impact ionization. Pregabalin was…

iv. Increased enzymatic capacities for substrate catabolism v. Higher degree of clustering of subsarcolemmal mitochondria adjacent to capillaries-> higher O2 flux rates vi. Mitochondrial volume densities and surface areas per unit mitochondrial volume are near maximum theoretical limits in hummingbirds and higher than mammals-> achieved due to higher oxygen delivery capacities and substrate catabolism (Suarez et al. 1991) 5. Metabolic Substrate Turnover a. Questions i. Do hummingbirds…

The corneal endothelium is metabolically highly active, and accordingly, endowed with a large number of mitochondria (**). Recent studies have claimed mitochondrial dysfunction in response to deliberate oxidative stress and in FECD (**). Although mitochondrial damage is correlated to cell death, its effects could be more subtle when the damage to the organelle is not severe. Specifically, when mitochondrial damage is not severe, the cellular functions could be impacted by ATP depletion. The…

This lab investigates the affect of sucrose on mitosis in onion root cells. The results of the experiment do not support the hypothesis. As the concentration of sucrose increases, the percent change in root length of the onion decreases. The individual data shows a 44.75% increase in the length of the onion root for the control group (0.0M). This is the highest percent change in onion root length. The solution is likely hypotonic. This means that it contains a higher concentration of water…

that influence the rate of diffusion across a membrane are: ~ the extent of the concentration gradient – the greater the difference in concentration on either side of the membrane, the faster the rate of diffusion ~ the mass of molecules diffusing – the heavier they are, the slower they will diffuse across the membrane ~ the distance travelled – this places an upper limit on cell size and functions as a resistance factor; distance travelled is indirectly proportional to the rate of diffusion ~…

The time required for the filter paper to float reflects the enzyme movement immensely. The enzyme movement is slower when there is a greater amount of time for the reaction to occur. As the temperature increased, the reaction time was quicker. For example, the class average for the substrate temperature “Hot” was 7.28 seconds, which was a drastic change from the temperature “Cold” of 66.54 seconds. The reason behind the change was that heat makes molecules move quicker, and cold makes molecules…

Reaction Time Definition: Reaction time is the speed at which the brain responds to a stimulus and formulates a response. This is vital in most sports. The most obvious example is responding to the gun at the start of a race, but another example is a goalkeeper saving a penalty. Importance: Sprinters need a fast reaction time so that they can react to the gun at the start of the race and begin moving as soon as they hear it. This gives them a better start and for such a short race every fraction…

This essay will be talking about Reactions and how it affects substances.A reaction is a chemical process in which two or more substances act on each other and are changed into different substances, or one substance changes into other substances.There are eight reactions we will be talking about and they are Decomposition,Combustion,Acid and Base,Synthesis,Single-replacement,Double-replacement,Precipitation,and Redox.In the world today there are many reactions out their but we will only be…