Effect of ammonium nitrate on Ceratopteris richardii Abstract: Ceratopteris richardii, also known as C-fern, is commonly used in research studies as a model plant because of its short generation time. In this experiment, we aimed to observe the effects of ammonium nitrate on this species of ferns. To achieve this, we inoculated and evenly spread three drops of C. richardii spores into two separate and sterile petri dishes, one control group and one experimental group. The experimental treatment contained 1% ammonium nitrate on the medium and the control treatment was merely a normal nutrient-rich agar. Then, we performed an f-test and a t-test to determine if there was any germination difference between the treatments.
It is stated on www.biologyinfo.com that, “Not all bacteria are harmful. In fact, less than 1 percent cause disease, and some bacteria that live in your body are actually good for you”. However there are some bad bacteria which cause diseases such as, MRSA, strep throat, tuberculosis, anthrax and urinary tract infections. Viruses are a great deal smaller than bacteria. They are contained in a protein coating which makes them more difficult to destroy.
IV. Materials V. Procedure VI. Observations/ Data; Lesson Three Collection and Analysis: A) Data Collection; 1. For the first plate, +pGLO (LB/amp), there was not a lot of growth on the plate, in comparison to the other groups and it did not glow under UV light. For the second plate, +pGLO (LB/amp/ara), there were even fewer colonies observed, unlike any of the other groups as well, and it did glow under UV light.
There are many structures of epithelial tissue, however I will only briefly cover four of them, these are squamous ,cuboidal, columnar and compound cells. http://kidsresearchexpress-5.blogspot.co.uk/2008/08/tissue.html Squamous Epithelial Cells Squamous cells are flat and they fit closely together, they don’t offer much protection as they are quite delicate and thin. Due to their thin construction, this allows small molecules to easily diffuse through the cell. This type of epithelial tissue can be found in places where rapid diffusion takes place such as the kidneys as they diffuse up to 180 litres of blood every day. http://www.bio.davidson.edu/people/kabernd/berndcv/lab/epithelialinfoweb/simple%20squamous%20epithelium.html Cubodial Epithelial Cells Cubodial cells are obviously shaped like a cube, hence the name.
Among four types of surfactants, partially hydrolyzed PVA is most frequent used because it gives the smallest microsheres (Jeffrey et al, 1991). The amount of PVA used may affect microparticles properties. Freitas and coworkers have added 1.3% and 8% of PVA into an aqueous solution and found that both lower and higher concentrations of surfactant results in coagulation of the particles. Hence, these authors suggested to use 3% of PVA as it the most optimum concentration. (Freitas and Marchetti,
Lab Report: “The Unknown” NAME: Donnise Warren PURPOSE: The purpose of this lab report is for students to be able to identify an unknown bacterium given to us by doing a variety of lab procedures and biochemical lab test to help identify what specific bacteria we have. INTRODUCTION: There are many reasons for knowing the identify of microorganisms. Such as knowing the causative agent of a disease that a patient may acquire, so that you would know how it could be treated, to knowing which microorganisms could be used for making antibiotics or even food. This lab report was done by implementing methods that have been learned throughout this semester in our microbiology lab course which helped identify my unknown bacterium #115. 6/28/2012 The 1st lab procedure performed was the gram stain.
The reason I believe they were the most effective am because they both caused the inks to spread out the furthest amount. While vegetable oil, and alcohol did not do all that much. (5 points) Score 3. Which solvent caused the ink from the dots to move the most? Which solvent caused the ink from the dots to move the least?
The reason this makes Koch so important is because if he hadn’t investigated Anthrax using Pasteur’s theory, the germ theory may never have caught on leaving people to believe false theories for much longer. Koch helped the advancement of medicine and life expectancy take a big step forward. Koch used very interesting methods that enabled him to research bacteria much easier than what other scientists researching the subject could. He used certain ways of staining bacteria so they could be photographed; he did this by using dyes such as methyl violet. He also discovered a way of growing bacteria on potatoes rather than in water, meaning they were easier to see and study, as the solid particles didn’t move, unlike the loose water molecules which moved along with the bacteria.
For instance, I learned how pigments absorbed strongly move slowly and pigments absorbed weakly move the fastest. Another thing that i obtained from performing this lab is that each pigment has a characteristic rate of movement and can be seperated from eachother. There were various ways that errors could occur during this lab. One error is human error. for example, you could put too much spinach on the chromatography paper.
A mud pie is dry, grainy, and cracks easily. Although a mud pie is not edible, it is messy and fun to make. Apples pies can be made with sweet or tart apples, either of which makes a delicious pie. Apples are peeled, cored and cut into thin slices, mixed with flour, sugar, cinnamon and nutmeg. This mixture is enclosed in a double crust and baked until golden brown and bubbly.