FACT: Potassium tellurite (K2TeO3) inhibits the growth of gram-negative bacteria and most of the upper respiratory tract normal flora. Oxyanions of tellurium‚ like tellurite (TeO32-)‚ are highly toxic for most eukaryotic and prokaryotic organisms. Known for its antimicrobial properties‚ potassium tellurite has been used in selective media for the isolation of a number of naturally tellurite-resistant bacterial species such as the C. diphtheriae. These tellurite-resistant bacteria reduce tellurite
Premium Bacteria Oxygen
The ratio of the With the results obtained accurately‚ calculations were made to find out the following: * The mean of each group’s data * The standard deviation of each group’s data As each trial consist for 5 different sizes of the agar cubes (1cm‚ 1.5cm‚ 2cm‚ 2.5cm and 3cm) and that the trials are repeated 5 times‚ we expect that results will be as follows: * As the size increases‚ it will take a longer time for the pink color (phenolphthalein indicator) to reach the center
Premium
Staphylococcus aureus‚ were grown singly and mixed on four different types of agar in order to observe the varying morphologies within the colonies. Resulting data was analyzed to provide understanding of the use of differing culture media and conditions for bacterial growth. RESULTSFour different agar types were used in this experiment. The first (Nutrient) allowed for growth of both E. coli and S. aureus. The second agar used (MKL) inhibited the growth of S. aureus but allowed the growth of E. coli
Premium Bacteria Microbiology Staphylococcus
| GRAM-POSITIVE BACTERIA * Alpha and gamma hemolysis on blood agar * Bacillus cereus colonies on blood agar * Beta-hemolysis on blood agar (S.aureus) * Beta-hemolysis on blood agar * Beta-hemolytic colonies on blood agar * Clostridium perfringens Gram stain * Corynebacterium diphtheriae Gram stain * Corynebacterium pseudotuberculosis on blood agar * Enterococcus faecalis * Enterococcus faecalis on blood agar * Enterococcus faecalis Gram stain * Enterococcus faecalis SEM
Premium Streptococcus Bacteria Microbiology
INTRODUCTION The name agar originated from the Malay word “Agar-agar”‚ For the sake of simplicity agar-agar was shortened to just agar and is now accepted universally whether in the food and other industries. The use of agar became widespread in Indonesia‚ Malaysia‚ China‚ and Korea‚ where people called it Agar-Agar‚ which means seaweed. Its introduction to Europe dates from 1859‚ almost two hundred years later. Agar has been used in food preparations for over three hundred years. Agar-agar is also practiced
Premium Provinces of the Philippines Kilogram
diffusion rate in agar cubes? Hypothesis: The rate of diffusion in directly related to the surface area to volume ratio of cells and is responsible for the efficiency of absorbing nutrients‚ oxygen‚ minerals etc. in the cell. This ratio is specific to cells as they require a ratio that isn’t big enough to take too long to receive the nutrients and oxygen or too small to impair diffusion‚ known as the maximum sustainable cell size. Due to this it would be expected that the smaller the agar cube the larger
Premium Molecular diffusion Sodium hydroxide Volume
when the agar blocks are placed in solutions of different concentrations of HCl. As the concentration of HCl increases‚ the rate of diffusion will also increase due to the steeper concentration gradient created. To investigate the change in rate of diffusion when different concentrations of HCl are used‚ I used agar blocks that are stained with universal indicator that would change from green to pink when exposed to HCl. To prepare the agar blocks‚ I used knife and ruler to acquire 5 agar blocks with
Premium
plates. This indicates that the Tn10 exposure was the cause of mutant variation. There were ten hypothesized auxotrophic colonies based on the comparison of mutagenized colonies in minimal and nutrient agar. These ten colonies were confirmed to be auxotrophic by their lack of growth in the minimal agar replica plate. The required growth factors for each auxotroph were determined based on which pool plates fostered growth for each streak. Auxotrophs 1‚ 2‚ 3‚ and 4 require valine as a growth factor
Premium DNA Escherichia coli Bacteria
Equipment: * 3 agar plates * Blank discs * Antibiotic assay disc * Culture of Bacillus subtilis * Forceps * Bunsen Burner * Inoculating loop * Tea Tree oil * Heat Mat Method: First Agar Plate * Sterilise inoculating loop using Bunsen burner‚ allow inoculating loop to cool before using inoculating loop to pick up‚ the liquid of the culture. * Agar plate to be open as little as possible‚ minimising
Free Bacteria
of bacteria when placed in liquid nutrient broth culture‚ the number of species present had increased in growth. .(1) (ii) Experiment 2 illustrated the growth of bacteria when placed on different surfaces of solid agar plates which included: nutrient agar‚ CLED agar and MacConkey agar; the number of species present also had increased in growth. (1) 2(A). Experiment 1: Choose 2 words that describe the appearance of the pre –incubation broth: (i) Straw yellow
Premium Bacteria Escherichia coli