• Join over 1.2 million students every month
  • Accelerate your learning by 29%
  • Unlimited access from just £6.99 per month

Explain the role of personal hygiene in the control of microbial disease.

Extracts from this document...

Introduction

Marlene Soares Bridging Science L2 Group2 15/03/2007 1.2 Identify respiration in yeast. Glucose solution Number of bubbles released per minute Average bubble production 1 2 3 4 1% 3 4 3 2 3 5% 7 5 5 5 5.5 10% 6 5 5 6 5.5 Conclusion- Glucose concentration increases and the number of bubble produced increases. Explanation- Glucose is used in respiration to produce carbon dioxide, water and energy. The yeast becomes more active as energy production due to respiration increases. Questions 1- What gas is likely to be present in the bubbles? The gas that is present is carbon dioxide. 2- How would you collect and test the gas to find out if your answer is correct? I will collect the gas with a test tube and then light on; if it will come with a pump sound then I know that carbon dioxide is present. ...read more.

Middle

The rate of respiration decreases. Explanation- The collision theory tells us that the temperature increases with the involvement of K.E., glucose, oxygen and enzymes goes up. The number of collision increases and it will have more reactions producing more carbon dioxide. 2.1 Identify methods in which microbial disease are spread. Method of spread Example of disease Physical contact Athletes foot Body fluid to body fluid Aids, rabies, syphilis, gonorrhoea Alborne Flu, tuberculosis, cold Vectors Malaria by mosquito, sleeping sickness by tsetse fly Food borne Food poisoning, tape warm, botulism 2.2 Identify methods to prevent the spread of microbial disease. Aids * Use condom if you have a physical contact with a person that is infected. * Don't use a needle that has already been use. If you need to reused, first sterilize them ten used again. Athlete's foot * Don't walk with bare foot on a dry ground. ...read more.

Conclusion

clothes To remove bacteria Clean the toilet To kill bacteria or germs Take shower every day To reduce or kill bacteria Clean the fridge To reduce bacteria grow 2.4 Identify methods of control of microbes used in the production of food. Food can be preserved by canning * The air tight can keep micro-organisms from getting into food. The food is also heated before being sealed in the can to kill any micro-organisms that are already there. Food can be prevented by frozen * Micro-organisms can't grow and reproduce if it's too cold. Food can be prevented by drying * Micro-organisms need water for life processes. Removing water stops them from growing and reproducing. Food can be prevented by salting * A high concentration of salt makes bacteria "shrivel" due to osmosis. Food can be prevented by pickling vinegar * Most pathogens can't survive low ph Food can be prevented by ultra heat treatment * Heating food to high temperatures for a short time to kill micro-organisms. 1 ...read more.

The above preview is unformatted text

This student written piece of work is one of many that can be found in our AS and A Level Energy, Respiration & the Environment section.

Found what you're looking for?

  • Start learning 29% faster today
  • 150,000+ documents available
  • Just £6.99 a month

Not the one? Search for your essay title...
  • Join over 1.2 million students every month
  • Accelerate your learning by 29%
  • Unlimited access from just £6.99 per month

See related essaysSee related essays

Related AS and A Level Energy, Respiration & the Environment essays

  1. Marked by a teacher

    effect of temperature on the rate of respiration in yeast

    5 star(s)

    * I will get the test tube and the syringes. * Then I will collect yeast in a small beaker. * Then I will stir the yeast using a stirring rod. * Then I will use a 10ml syringe to collect 10ml of live yeast.

  2. Marked by a teacher

    Effect of nitrate concentration on the growth of Duckweeds

    5 star(s)

    t- test, as all the fronds had died, and using the 0 values will just increase the spread of data. So it will be more reliable not use them values, therefore the t- test carried out for trend B will be between 0.4% to 1.6% The t- test formula that

  1. Marked by a teacher

    Fighter Pilot A Statistical Analysis of Reaction time and its Correlation with Dominant ...

    5 star(s)

    not differ, for example accurately following the controlled variables stated in the introduction became very difficult to enforce as the time set out for the experiment was running out. Willing and accepted participants became harder to find so leniency was allowed upon those who smoke and consumed caffeine.

  2. Marked by a teacher

    'An investigation into the ability of two strains of the yeast Saccharomyces cerevisiae to ...

    4 star(s)

    respiration rate was reduced by 14.4% and when galactose was available for respiration the rate dropped by 7.2%. When galactose was made the available substrate for baking yeast, the rate of respiration fell from 0.716 (as with the control) to 0.686 arbitrary units, which is a reduction of 4%.

  1. Marked by a teacher

    The Effectiveness of Different Solutions to Prevent or Treat Malaria

    4 star(s)

    for the treatment of malaria.? This drug is a great way to treat malaria and better than other non-artemisinin based combination drugs, but due to the fact that resistance has rapidly increased on sulfadoxine-pyrimethamin drug it is no longer recommended by the WHO (World Health Organization).

  2. Marked by a teacher

    The Role of the Respiratory and Circulatory Systems in the Provision of Oxygen and ...

    3 star(s)

    Oxygen enriched blood (or oxyhaemoglobin complex) is then transported, via the pulmonary vein, to the left atrium of the heart. The pulmonary vein is different from other veins as it carries oxygenated blood whereas most other veins carry deoxygenated blood.

  1. the effect of bile concentration on the activity of the enzyme lipase during the ...

    However as you can see in the graph it begins to plateau almost immediately indicating that a small amount of bile salts is able to emulsify a large amount of fat molecules and other factor affecting enzyme activity begin to limit the reaction at higher concentration of bile salts.

  2. the role of pathology service

    Treatment The doctor is likely to prescribe thyroxine to patients (also known as levothyroxine or T4). In some cases it may be prescribed an alternative thyroid hormone, tri-iodothyronine (T3 or lyothyronine). If patients are elderly or have any history suggestive of heart problems (eg angina or heart failure), the doctor

  • Over 160,000 pieces
    of student written work
  • Annotated by
    experienced teachers
  • Ideas and feedback to
    improve your own work