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University Degree: Applied Biology

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  • Marked by Teachers essays 2
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  1. Marked by a teacher

    Should a DNA profile be taken at birth?

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    The process of electrophoresis is used to gather 'non coding DNA' (areas of short tandem repeats, STRs) using restricting enzymes. There are two common methods of separation and detection, capillary electrophoresis and gel electrophoresis Almost 99.8% of our DNA is identical; accordingly this process focuses on that .2% that is different. 3 Crime scenes and paternity tests alike can be an influential factor in determining if someone was involved or is a relation respectively. Within the controlled paternity environment sufficient DNA can be obtained but under the contamination and pressures of a crime scene the process becomes increasingly difficult.

    • Word count: 1264
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    They may coexist with a decrease in their potential for growth. Neutralism is the most common type of interspecific interaction. Neither population affects one another nor are any interactions that do occur indirect or incidental. Amensalism is when one species suffers and the other interacting species experiences no effect at all. This is may be viewed as a very asymmetric form of competition. Mutualism is an interspecific interaction between two species, which benefits both members. Populations of each species grow, survive and may or may not reproduce at a higher rate in the presence of other species.

    • Word count: 1152
  3. Digestion

    The oesophagus is a passageway that carries food from the mouth to the stomach. Food moves along the tube by muscle contractions called peristalsis. The stomach is seen as the core of digestion where, physical and chemical digestion both take place; gastric juices containing enzymes and HCl work on the food material whilst muscles churn the food. The stomach has sphincters at both the entrance and exit of the stomach (cardiac and pyloric respectively) to contain food and release it in small amounts to the rest of the digestive tract.

    • Word count: 1459
  4. The functional part of the kidney are called the Nephrons, in each of the kidney there are about 1 million functional Nephrons, they control the molecules that passes through the kidney and also filter the kidney. Each of the nephron composed of six regio

    As the filtrate travels along the nephron, additional impurities are removed, and the filtrate is concentrated into urine for the purpose of expressing waste products and excess water. The things which are removed are urea, salt water and glucose. However blood cell or larger proteins that is too big or that are negatively charged cannot pass through the capillaries of the Bowman's capsule, therefore retaining the protein in the circulation. Water balance is maintained in the body through the kidney as it is maintains its level.

    • Word count: 1609
  5. Isolation and Purification of Egg White Proteins

    9.5 Volume of supernatant containing ovalbumin and conalbumin (mL) 7.1 Volume of saturated ammonia sulphate added to supernatant (mL) 7.1 Isolation of Ovalbumin Volume of Ovalbumin + H2O, mL 7.9 Volume of saturated (NH4)2SO4, mL 7.9 Volume of Ovalbumin after dialysis, mL 19.5 Isolation of Conalbumin Volume of supernatant containing Conalbumin, mL 98 Mass of ammonium sulphate used (g) 7.840 Volume of Conalbumin after dialysis, mL 15 Calculations: Mass of ammonium sulphate required to produce 8% (w/v) solution = 8% x 98 = 7.840 g Week 2 Volume of egg white used = 26.5mL Volume of sodium bicarbonate buffer added = 26.5 x 4= 106 mL Total volume = 132.5 mL Isolation of Lysozyme A Volume of Lysozyme A,

    • Word count: 1992
  6. Estradiol Injections Induces Vitellogenin mRNA in Male Fish

    The central dogma has become the backbone of molecular biology since its creation in 1958. This process, which states that information in biological systems flow in one direction: from DNA to RNA (transcription) and from RNA to proteins (translation), is the framework for understanding the transfer of sequence information between sequential information carrying biomolecules such as: DNA, RNA, and proteins (Dorfleur and Bohm, 2006). All the structural and functional processes in a living cell revolve around this mechanism. It explains that the ribosome in the cytoplasm uses mRNA, a mobile copy of a gene transcribed from RNA, to assemble the required polypeptide.

    • Word count: 1622
  7. Purification of proteins using hydrophobic interaction chromatography.

    The popular techniques include ion- exchange chromatography which separates ions and charged molecules, affinity chromatography which focuses on the separating proteins by their binding specificities, size- exclusion chromatography separating proteins according to their molecular mass, hydrophobic interaction chromatography and reversed phase chromatography exploiting on the hydrophobic properties of the proteins. (Poole 2003; Bonner 2007; Lehninger 2005). The aim of this essay is to provide different aspects of protein purification using hydrophobic resins. Proteins have different sequence of amino acids present in them and their structures include primary, secondary and tertiary.

    • Word count: 1683
  8. Guide to Intermediate Bodybuilding

    One of the most common mistakes made by people who wish to be healthy or lose weight is drastically cutting calories. Although it seems logical for a person who wishes to lose weight to eat less, this might actually cause a somewhat negative affect for a person. The reason for this having a negative affect is because by drastically cutting your calories you are causing your metabolism which burns calories for you, to slow down significantly which means you burn less calories overall.

    • Word count: 1202
  9. Osmosis in Potatos

    The concentration of sap in the sap vacuole of a potato cell is approximately 10% - 15%. I intend to place a predefined weight of potato cells (0.15g) in varying concentrations of sucrose solution (0%, 20%, 40%, 60%, 80%), to see the effects of osmosis in the cells of a potato in varying levels of sucrose solution. The potato cores will be prepared, weighed and then placed in the solution and left for a certain amount of time, they will then be removed, re-weighed and the difference in weights calculated and plotted, and a conclusion reached. I have done some preliminary work into osmosis in potato cells.

    • Word count: 1713
  10. Healthy Eating - Comparing Supermarkets

    The larger superstores are often out of town; however they have large car parks offering free parking. The local stores are in the community and are therefore accessible to the local communities. Sainsbury's offer online shopping, with delivery direct to your home. A free bus service is provided by out of town shopping centres where Sainsbury's stores are located. Sainsbury's also support rural communities through the Sainsbury's Assisting Village Enterprises (SAVE) scheme, which helps support small independent shops and post offices providing essential services in rural areas by enabling these shops to sell non-perishable products from the Sainsbury's store.

    • Word count: 1540
  11. Isolation of a natural Product and Purification and Infrared spectrum of trimyristin

    Small amount of activated carbon is added to during the recrystallization in order to absorb the colour inside the solution. After that, it can be filter out by the fluted filter paper. Objective: To isolate trimyristin from nutmeg seed by solvent extraction To purified it by recrystallization. To obtain an infrared spectrum of the isolated trimyristin from the recrystallized trimyristin from the experiment. To study the difference between the infrared spectrum results of the isolated trimyristin from experiment 3 and the recrystallized trimyristin Materials and Methods Procedure for the isolation trimyristin from nutmeg seed by solvent extraction 15.13g of ground nutmeg seed, 40ml of acetone and five antibumping granules were placed into a 100ml round bottom flask.

    • Word count: 1180
  12. Industrial Report

    This also helps in the finding out the adulteration that has been done in the production. The Company is mainly organised into 4 levels. The four levels in the order of descending higher archey are as follows: 1st comes the Executive board which gives effect to the decisions and the policies of the company and to give advice and produce suggestions for the development of the company. 2nd comes the Main board which is responsible for the shares of the company it holds in the stock market.

    • Word count: 1589
  13. Heat Balance in a Hot Environment

    An aural thermistor was inserted into the ear and the headband was put on to ensure the thermistor was held in place. Firstly a 30 minute control period was carried out with the subject at rest in a cool environment. The subject was weighed on an electronic balance at the start and at the end of this 30 minute rest period. When this period was concluded, the subject was moved to the hot environment (temperature controlled room), in which the temperature was kept at approximately 40�C and the relative humidity was approximately 20%.

    • Word count: 1815
  14. Organic Molecules

    (SYMBIOSIS p20) Purpose In this lab, we will perform simple tests to determine the absence or presence of the four different organic compounds. These tests will, of course, be qualitative rather than quantitative. Meaning we will not be determining the quantity of these compounds within the samples, but simply whether or not they are present. Carbohydrates are what give the cells within our body it's energy. As mentioned before, the building blocks of carbohydrates are sugars. These sugars can are classified according to the amount of sugar molecules they have.

    • Word count: 1429
  15. Effect of Isotonic Exercise on HR and BP

    This initial response to the impending exercise is equivalent to that of the "fight-or-flight" response. Nerve impulses, initiated from the hypothalamus in the brain are sent to the sympathetic division of the ANS, which then starts to rapidly organise the body's essential resources, such as oxygen and glucose, for the onset of physical activity. Vast amounts of these resources are transported to organs such as the brain, skeletal muscles and the heart. The second mechanism is the actual increase in heart rate during exercise. This is a more complex sequence of events where the increased cellular metabolic processes taking place in active muscles cause relaxation of smooth muscle in the local arterioles.

    • Word count: 1638
  16. Superbugs the rise and fall of hospital acquired infections

    difficile produces heat-resistant spores that remain on hospital surfaces for a long period of time. Once the spores are ingested, they pass through the stomach to the colon, where they change into their active form and multiply. Patients who stay long-term in a hospital have a higher chance of this happening. It is linked to 400 000 cases of severe diarrhea each year and is often fatal. Cases of C.difficile have risen by 5.5% in 2006 compared with 2005 and are still on the rise (Star, 2007).

    • Word count: 1119
  17. Ecstasy and Brain Damage.

    [5] Despite its classification, the use of the drug has risen dramatically over the past 15-20 years. Between 1991 and 1997 the percentage of college students (US) who had taken MDMA rose from 0.9% to 2.4%. During the same period, use among young adults rose from 0.8% to 2.1%. [6] A more recent study in the US has shown that 2.3% of college students and 4.3% of young adults between the ages of 19-28 years had taken the drug at least once during the last year.

    • Word count: 1867
  18. Contact cues are an effective substitute for the loss of vestibular function

    Individuals affected by such a loss often demonstrate different head and body control patterns than normal2. Many patients with a vestibular dysfunction use a cane or use their index fingertip as a contact cue to provide tactile input, which leads to improvement of spatial orientation and postural sway3. A series of studies on vestibular loss patients indicates that somatosensory cues at the fingertip and hand reduce their postural sway. The tongue and fingers enhance balance control due to their precise spatial resolution4. The study performed by Fitzpatrick and McClosely in 1994 demonstrated how the fingertip can capture body displacement and motion at levels below threshold for the vestibular apparatus.

    • Word count: 1869
  19. Discuss the presentation of Adverse Events & Adverse Drug Reactions in the PI.

    Discuss the presentation of Adverse Events & Adverse Drug Reactions in the PI. The Australian Guidelines for Registration of Drugs stipulate that the PI for a product should provide an indication of the adverse events that have been associated with treatment, as well as their severity, clinical importance & frequency. The adverse events listed within a PI may be drawn from comparative trials, as well as adverse reactions reported during pre and post marketing experience. Adverse events identified from clinical trial data will often include the incidence rates of the most frequently observed adverse events, regardless of whether their causality to drug treatment has been confirmed.

    • Word count: 1445
  20. A letter to The Honorable Kay Bailey Hutchison.

    Reality - We can re-shape Americans' payments to drug makers to protect everyone without spending appreciably more money. Almost all of the required money is already being spent. * Myth - If government interferes with today's highering prices and profits, 'The lights go out in the labs, and there is no R&D,' according to Tracy Baroni, senior director of policy for the Pharmaceutical Research and Manufacturers of America (PhRMA). Reality - The drug makers' short-term profit maximization is the real long-term threat to adequate research financing.

    • Word count: 1139
  21. "Many firms have outsourced their payroll systems, while hardly any are "buying" R&D services. Explain why this is generally true, and why Monsanto followed a different strategy."

    Such costs involve the extra bureaucracy needed and the draining of resources which could have been used more profitably elsewhere. Finally the firm must evaluate where the function can be produced most cheaply, in direct costs1. Summing up this simplefied problem will give a firm two sets of costs, the cheapest of which it should choose. This presentation is problematic for functions such as R&D. The firm's very existence is based- and dependent on its R&D. The firm is built around an idea where R&D is the function to develop the idea further or find related ideas which can be exploited.

    • Word count: 1266
  22. Discovery of Rice Genome by Monsanto Company.

    The following paper will however contain its discussion to the developmental aspect of biotechnology, and take the Monsanto Company as a case study. (Crop Life, 2003) Monsanto Company Established in 1901 by John F. Queeny, Monsanto today employs more than 14,000 employees across the world. One of the original producers of the artificial sweetener saccharin, Monsanto in collaboration with other companies, through its branch offices, liaison companies boasts of producing and manufacturing a complex variety of products, ranging from pharmaceuticals, industrial chemicals, herbicides, and other agricultural products.

    • Word count: 1253
  23. The development of the Biotechnology.

    Microbiology, Genetics, Molecular biology and Biochemistry form the root foundation, which is supported by the Chemical Engineering. The science of biochemistry has yielded better results with the improvement made in the different other branches of biology and chemistry. Biotechnology thus can be defined as the use of living organisms and their products in the industrial processes. The development of the Biotechnology owes to the researches done by a number of the scientists are listed below: GREGOR MENDEL established the basis laws of the inheritance. GRIFFITH proposed that the DNA is responsible for transformation of bacteria called pneumococcus.

    • Word count: 1051
  24. Commentary on Food Biotechnology Consensus Conference.

    Risk management requires communication and trust between academic experts, regulatory practitioners, interest groups and the general public. Citizens and scientific experts often perceive risks differently. The scientists tend to focus on quantitative aspects like morbidity, mortality and probability. The ordinary citizens on the other hand, tend to view risks more qualitatively like fairness, ethics, and freedom to take or to avoid a risk, which science typically ignores. Therefore, communications strategies must seek to break the barrier and accomplish greater trust so that the public and all parties understand the issues.

    • Word count: 1760

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