• 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)

    The alternative hypotheses can only be accepted if we are 95% or more sure that the null hypothesis is not correct. The standard deviation formula used is The standard deviation of 0% = 6.58 0.4% = 7.67 0.8% = 4.91 1.2% = 3.00 1.6% = 2.56 2% = 1.57 Looking

  1. Marked by a teacher

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

    5 star(s)

    Since the calculated value of p is 0.251 and higher than 0.05 the null hypothesis must be accepted and the alternative hypothesis rejected. vi. There is a no significant difference between the reaction times of dominant and non-dominant hands Discussion The initial results visible from table seven shows that the dominant handed subjects are the faster group.

  2. Marked by a teacher

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

    4 star(s)

    When provided with lactose however, the baking yeast respiration rate increased by over 6.5%. Again the yeast's inability to hydrolyse galactose molecules indicates that the enzyme required to degrade this carbon source may not be present in the cells. Maltose is a disaccharide comprised of two glucose molecules.

  1. Marked by a teacher

    The Effectiveness of Different Solutions to Prevent or Treat Malaria

    4 star(s)

    and the mortality( the proportion of deaths to population). There are two types of combination therapies, Non-artemesinin-based combinations and Artemesinin based combinations. A Non-artemesinin-based combination drug is amodiaquine plus sulfadoxine-pyrimethamin which according to Wikipedia?s table ?This combination has been shown to produce a faster rate of clinical recovery than SP and chloroquine, but is clearly inferior to artemisinin-based combinations (ACTs)

  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. Isolation and identification of individual microbes and growth and monitoring of microbes.

    Equipment, which is left, running, should have an appropriate warning notice Spills Spills should always be cleared up immediately. While a few may need absorption and/or chemical neutralization using a spill kit (or disinfection or similar treatment), most minor spills can be dealt with by a damp cloth.

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

    of the 5% bile salts solution until it is approximately 80cm3 3. Refill the beaker labelled distilled water with some more distilled water until it is approximately 60cm3 4. Using the same 20cm3 suck into the pipette 20cm3 of the 5% bile salts solution and then pour it into the volumetric flask 5.

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