MATERIALS 1.- Graduated cylinder 2.- Hydrogen peroxide 3.- Dish detergent 4.-Food coloring 5.-Potassium iodide 6.-Safety Glasses 7.- Lab smock PROCEDURE 1.-Put on your safety glasses and lab smock for your own safety. 2.-Pour the hydrogen peroxide into the graduated cylinder. 3.- Add 5 drops of food coloring to the hydrogen peroxide. 4.-Add the dish detergent to the peroxide in the cylinder. 5.- Then you pour the potassium iodide to the mixture and quicky back off. o you don’t want
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Investigate Concentration of Substrate on Catalase enzyme 1. Aim/Prediction. Aim of this experiment is to investigate concentration of substrate on catalase enzyme‚ as well to see how they work in different concentrations of hydrogen peroxide (H2O2). Prediction would be‚ that the filter paper discs that were used‚ will rise up to the surface in a time in the tube of different concentration of hydrogen peroxide. And in different concentrations the time will be different. As higher the concentration
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the ions in the solution. While testing for anions‚ iodide and nitrate react with H2O2. Iodide formed separate layers and nitrate had no observable change. While testing for cations‚ lead and potassium reacted with H2S. Lead turned grey then a dark precipitate settled at the bottom. Potassium remains clear even after heating. Next‚ lead nitrate was added to potassium iodide. During the test for anions (again with H2O2)‚ the solution turned purple. This signifies the presence of iodine. During the test
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blot dried and observed under microscope at 100x with oil immersion. The slide either appear in pink (gram-negative) or purple (gram-positive). Catalase Test: Catalase test enzyme detection of microorganisms‚ catalase hydrolysis hydrogen peroxide (H2O2) into H2O and O2. The catalase test was performed by used a sterile transfer loop been flamed to remove small amount of bacteria from slant agar and placed on the slide. Then
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study‚ a tincture from P. tithymaloides collected in Cuba was evaluated for its in vivo anti-inflammatory activity‚ using the rat paw oedema assay‚ and for its in vitro IÀ scavenging effects on reactive oxygen species (ROS) (HOI‚ O2 ‚ HOCl‚ ROOI and H2O2)‚ reactive nitrogen species (RNS) (ONOOÀ and INO)‚ and I DPPH radical. The protein‚ free amino acid‚ and phenolic contents of the tincture were also determined. Pertaining to the anti-inflammatory activity‚ the intraperitoneal administration of the
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UTAR FHSC1134 Inorganic Chemistry Trimester 3 Experiment 1 ________________________________________________________________________ Title: Investigating the Properties of Period 3 Oxides Aim: To examine the oxides of Period 3 elements and describe their structure and bonding. Introduction: Generally‚ there are oxides of metals and non-metals. Metals burn in oxygen to form basic oxides while non-metals form acidic oxides. Structurally‚ they are covalent or ionic compounds. You are to
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the drug on shelf. When the degradation processes were induced and observed using the proposed HPLC method‚ a regular decrease in the drug concentration with increasing time intervals was noticed. For each temperature and strength of HCl‚ NaOH and H2O2 stated in the experimental part‚ the logarithm of intact drug remaining percent was plotted against the corresponding time in minutes as shown in Figures 5 and 6‚ respectively‚ also the regression equations were computed. For all the investigated
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Acute Inflammation The survival of all organisms requires that they eliminate foreign invaders‚ such as infectious pathogens‚ and damaged tissues. These functions are mediated by a complex host response called inflammation. Definition of inflammation Inflammation is fundamentally a protective response‚ the ultimate goal of which is to rid the organism of both the initial cause of cell injury (e.g.‚ microbes‚ toxins) and the consequences of such injury (e.g.‚ necrotic cells and tissues)
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From these initial observations a Hypothesis will arise. A Hypothesis may be described as a sort of educated guess or question even‚ one which requires additional information to test accurately. One I come back to is the old hypothesis involving decomposition which challenged the widely held belief of spontaneous generation. The next step is more observation and experiments aimed at testing the validity of the hypothesis. After this
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the underlined elements in the following species. (a) (e) (i) (m) (q) (u) (y) 2. SO3 PbSO4 CoCl42CrO42SO32Ca(NO3)2 Co(NH3)43+ VO2+ CaH2 KMnO4 SCl2 N2 NaOH (c) (g) (k) (o) (s) (w) HCO3[Al(OH)4]MnO42NO2FeCl3 KOCl (d) (h) (l) (p) (t) (x) H2S2O7 H2O2 Cr2O72K2SO4 CH4 Pt(CO)4 Which of the following equations represent redox reactions? Specify the species being reduced in each case if applicable. (a) (b) (c) (d) NaI(s) + 2K(s) + 2NH3(g) Zn(s) + (e) 2KBr(aq) 3. (b) (f) (j) (n) (r) (v) H2SO4(l)
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