increase overall growth. We tested these hypotheses by preparing five different petri dishes‚ each containing cultures of the bacteria E. coli. In two of these dishes (set up identically)‚ containing plain agar with no additional nutrients‚ we added small amounts of Penicillin to half the plate and water to the other half. We then observed the plates after one week’s time. For the other three plates we stored one dish at 4°C‚ one at 22°C‚ and one at 37°C; no antibiotics were added to any of these
Premium
The most common form now‚ is petri dish testing‚ which has been proven to be more effective than animal testing‚ because petri dishes can produce more relevant information. Along with petri dishes‚ there are Microfluidic chips. The chips are lined with human cells‚ which then can recreate the functions of human organs. When using the microfluidic chip‚ it allows
Premium Animal testing Animal rights Human
SUBLIMATION Sublimation is a technique used by chemists to purify compounds. Typically a solid is placed in a vessel which is then heated under vacuum. Under this reduced pressure the solid volatilizes and condenses as a purified compound on a cooled surface‚ leaving the non-volatile impurities behind. This cooled surface often takes the form of a "cold finger" (shown in the diagram above). Once heating ceases and the vacuum is released‚ the sublimed compound can be collected from the cooled surface
Premium Gas Carbon dioxide Temperature
tissue of animal ( fish ) 2. Mortal and pestle‚ 3. Petri dish 4. Lysis buffer 5. 1.5mL centrifuge tube 6. Phenol : chloroform (1:1) 7. Proteinase K 8. 3M NaOAc (ph 6.0) 9. Absolute ethanol 10. 70% ethanol 11. TE buffer / distilled water Procedure 1) Fresh fish was cut to 0.5cm 2) Fish tissue washed with 70% alcohol 3) Wetted the tissue with a few drop of 70% of alcohol ( in petri dish) 4) Minced the tissue using mortal and pestle 5)
Premium DNA Molecular biology Ethanol
Ethics Behind Stem Cell Research. Is Stem Cell Research ethical? Yes‚ it is. An embryo which is four or five days old‚ from which stem cells are derived‚ is not a human being yet‚ because it’s brain is nonfunctional and it’s heart is not beating. So destroying it would not be murder‚ it’s just a beginning of a long process of obtaining stem cells from it. Ronald Reagan‚ The Ethics Committee of the American Society for Reproductive Medicine‚ Christopher Reeve‚ Michael J. Fox and various writers
Premium
Biology 260: gENETICS | CROSSES OF SORDARIA | Sordaria of Tan and Grey Allele | | Abstract: To understand the details of genetic behavior‚ Sordaria fimicola is used in this study by observing the asci produced from monohybrid and dihybrid crosses with observance to recombination. This experiment performed extended over a three week period. The strains that were used from S. fimicola were wild type producing black‚ and mutants producing grey and tan strains. There are seven possible phenotypes
Premium Gene
inhibiting substance “Antibiotic”. As researchers found out more and more about these chemicals they were able to discover that antibiotics are chemicals or natural substances such as bacteria‚ fungi‚ as well as synthetic drugs; that inhibit or kill microbes in small amounts. Chemotherapeutic agents are antimicrobial chemicals (natural or synthetic) that can be used internally or may be absorbed. The purpose of antimicrobial drugs is either to inhibit virus replication‚ without harming host tissues or
Premium Management Marketing German language
The Effect of Molecular Weight on the Rate of Diffusion of Potassium permanganate (KMNO4)‚ Potassium dichromate (K2Cr2O7) and Methylene blue ¹ ABSTRACT The effect of molecular weight on the rate of diffusion was determined using the Agar-water Gel Test. One drop of potassium permanganate (KMNO4)‚ potassium dichromate (K2Cr2O7) and methylene blue were used. Each substance has a respective molecular weight of 158 g/mol‚ 294g/mol and 374 g/mol. The diameters (in millimeter) were measured
Premium Molecule Measurement Agar
of concentrations from 0 to 1.0M. Then we weighed all the potato cylinders on an electronic balance (see results) and recorded the results. We placed enough pieces of potato to cover the bottom of the petri dish and left them for 60 minutes. After this time we drained out the solutions from the petri dishes and carefully placed them in order of molarity on a paper towel. We also measured the total mass of the discs in each solution after soaking in the solutions (see results). Percentage change
Free Concentration Solution Chemistry
Determining Photosynthetic Activity in Plants Using Different Wavelengths of Light and Pigmentation Abstract The roles played by light and pigmentation in photosynthesis were examined in the geranium and Coleus plant. In addition‚ the separation of certain pigments based on their molecular structure was also examined‚ with the use of paper chromatography. When different leaves of the geranium plant which were exposed to different wavelengths of light‚ photosynthesis proved to be most actively
Premium