Diatom

The diatom test is a post-mortem investigation very useful to determine if a person drown in the place they were found or if the body was disposed post-morten there. The principle behind the diatom test is the detection of a micro algae species that are normally present in water bodies. With diatom analysis, if a person dies by drowning in a water body where diatoms are present, the water ends can be found inside the deceased lungs. As a result of a person drowning (normally the person struggles for about two and three minutes before they die) these micro algae passes onto the circulatory system, and is transported by blood to other organs such as the liver, the kidneys, and the bone narrow. If the person is already dead when they are thrown…

Diatoms are considered as one of the critical biostratigraphic tools, especially where calcareous fossils are absent or poorly preserved. While diatoms were common both in marine and non-marine paleoenvironment, diatom-based biostratigraphy is widely used in the marine stratigraphic record. Multiple Deep Sea Drilling Projects (DSDPs) made the core samples available from Antarctic, Equatorial Pacific, and High Latitude North Pacific region. The earliest known fossil diatoms are from Lower…

When I learned about the factors that affect the primary production of an ecosystem, namely light and nutrients, I learned that there can be harmful results if these factors are altered. If there is an increase in nutrients, which causes an increase in the production of diatoms, the algal bloom that can result effect not only the fish who directly eat the diatoms, but it can also have effects at a larger scale. Because the diatoms are at the bottom of the food chain, if there is a problem at…

Based on evidence, if a Protist could “protest” and be reclassified into another kingdom, which Protist could you help make the most convincing argument? To begin with, “Protista kingdom is sometimes called the, “junk drawer kingdom,” for the classification of living things. (Art. 1) When an organism’s characteristics do not quite fit into the fungus, plant, or animal kingdoms, they get classified into the Protist kingdom.(Article 1)”When scientists can’t figure out where to put organisms…

They are heterotrophs and depend on autotrophies. Krill are shrimp-like marine invertebrate animals. These are smaller zooplankton but it is important for larger marine mammals as food for baleen whales, whale sharks, seals, and a few seabird species. Krill phylum is Arthropod. Krill form key trophic link between primary producer and higher level in marine food web worldwide. The size range of krill is about two inches (five centimeters) in length. Microorganism like diatoms etc when colonize…

groups: the first would have both nitrogen (N) and phosphorus (P), the second would only have N, and the third would only have P; all three groups can be tested in order between April and mid-June where the graph shows the lake had some of the highest biomass of Diatoms, Dinoflagellates, and Green algae. The independent variables would be the N and P in each experimental group and the amount added in each setting; other factors like light, temperature, predation, and competition will vary from…

supernatant of the samples. I corrected the absorbance values for the solvent and turbidity. I then calculated the pigments present for each treatment (equations 1-4). Once the correct equations were determined, I calculated the pigment concentration in the sample of seawater (equation 5). The equations follow those outlined in Quigg (2016): Chlorophyll a=11.93(A664)-1.93(A647) Chlorophyll b=20.36(A647)-5.50(A664) Equation 1 and 2. Pigment calculations for chlorophyll a and b for green…

One type of sediment to note is diatomaceous earth, an uplifted siliceous ooze which contains the remains of the microscopic algae known as diatoms (Garrison and Ellis 152). With a density lower than most other sediments—measured at 0.2816 g/ml in our lab results—the powdery and apparently sticky sediment has rather tiny grains as expected from this sort of sediment. As diatomaceous earth derives from the diatom ooze of the deep ocean floor, it originates from the slow dissolution of diatom…

Mohamad Hamod Jenifer Fennel English 1110 June 25, 2015 Rhetorical Analysis The major purpose of the text is to show people how crowd funding projects such as KickStarterwork. The project, in this case, managed to raise $31,475, from a total of 584 backers (Diatom 1). The main aim was to make audiences aware of the innovation that allows people to design and construct their furniture, as well as, make people know that crowd funding and especially KickStarter works. The whole point is that…

non-target specific has lot of side effects. This is because during chemotherapy normal living tissue is also damaged along with the tumour cells. Greatest challenge is to find a drug delivery system that only kills cancer cells. Researchers had developed nanoparticles based cancer drugs loaded on silica particles, but this was not cost intensive. Diatoms are micron sized algal species with silica coated cell walls. Scientists then developed GM Diatoms (green) so that the silica shells of algae…