Many of the suggestions below involve the use of animals. Various laws apply to the use of animals in schools particularly any "live non-human vertebrate, coje is fish, amphibians, reptiles, birds and mammals, encompassing domestic animals, purpose-bred animals, livestock, wildlife, and also cephalopods such as octopus and squid". In most Queensland schools the Year 11 EEI provides students with a limited range of research questions to investigate, usually drawn from a single senikr eg plants.
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This allows students to focus on the process and techniques of investigation and the subsequent reporting. However, in Year 12 students are often given freedom to choose a topic or research question from the work covered over the whole of the course. These "Open Inquiry" EEIs may provide more ownership, engagement and deeper understanding for the students but do place a bigger demand on resources and laboratory management.
However, many teachers have found strategies to manage this should they choose to opt for a Open EEIs.Fayetteville Ad From A Quirky Female 55
A Materials Requisition Form accompanies this document. My thanks to Biology teachers from Nanango for sharing this. SchoolS have implemented various forms of Risk Assessment for their science laboratory or practical work. Examples of Risk Assessment forms can be found in the tasks available on this page. A comprehensive form developed Dedham IA bi horny wives several years by Urangan SHS can be found here: It is only an example and should not be assumed to necessarily meet the legal and safety obligations of any particular school or situation.All Granny Sex Burlington
The method of artificial variation: The method of concomitant variation: This is also called a "correlation method". You can think that nature has manipulated the variables but it is still appropriate to class one as dependent and one as independent. For example, do young leaves have the same density and distribution of stomata as older leaves; or how does temperature IV in a natural environment affect stoma opening DV?Wife Seeking Casual Sex Coto De Caza
In this second case you do not need you to control the environmental temperature, but you do need to measure the DV at different temperatures.
The difficulty with the second approach is the control of other potentially influential variables such as humidity - as you have to take what you get. However, that does not preclude the variables in relationship being considered the IV and DV or being graphed as such. One way to address the confounding variables eg humidity is to collect data on the other variable as well.
You can run the statistics on each pair separately, but, for students who are not that "stats-savvy" then they could look for interactions between them at a visual level. Does the amount of bacterial growth in food differ according to its preparation or handling? Although some micro-organisms are deliberately used to make foods such as yoghurt and cheese, other microbes 'spoil' food.
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Food, as well as meeting the nutritional requirements of humans, will also meet the nutritional needs of a vast range hosst micro-organisms.
These microbes will multiply rapidly in food, given the appropriate conditions such as temperature, pH and moisture. The flavour, aroma and texture will ultimately be affected.
Those most affected by food poisoning are the elderly, the young and immune suppressed individuals. Joseph Lister first hlst aseptic surgery in when he used a spray of carbolic acid phenol C 6 H 5 OH as a germicide. Since then the control of growth by antimicrobial compounds has grown into a multi-billion dollar industry. A good EEI is to assess the effect of a variety of antimicrobial disinfectants on bacterial growth.
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Our labbies prepare the plates and order in E. Students then put a yu of E. Laxy paper discs like out of a hole punch are sterilised and then soaked into different anti-microbials. The discs Horny girls North Charleston placed onto the agar plates and then into the incubator for a couple of days. If the anti bacterial Horny bitch Augusta effective there is a clear ring around the disc where the Plua.
Students have used the width of this ring to indicate effectiveness and to collect quantitative data. The experiment can work quite well; keen students have then researched the active compounds within the antibiotic, how they act upon the bacteria and link to the results observed".
No single disinfectant is ideal. Each has its advantages and disadvantages. For example, phenols sterilise well but are corrosive and Need senior lady 55 plus can host or come to you. Risk assessment including disposal of waste is vital.
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Over years Dennis has assembled a vast collection of these micrographs, many of which have been colorized and can be viewed on his website. Probiotics are live bacteria and yeasts that are good for your health, especially your digestive system. We usually think of bacteria as something that causes diseases.Sweet Woman Wants Sex Lewiston
But your body is full of bacteria, both good and bad. Probiotics are often called "good" or "helpful" Nerd because they help keep your gut healthy. Probiotics are naturally found in your body.
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Supposedly they can lad the amount of "bad" bacteria in your digestive system that can cause infections or other problems. However, are probiotics able to survive the pH variations of exposure through the intestinal tract to offer health benefits? The task sheet, prepared by teacher Adam Delroy, can be downloaded here. After trying a general purpose nutrient agar medium, growth was very poor so a lactobaccilus-specific medium was tried MRS Agar from Thermo Scientific.
Details are available here. The MBC microbiology laboratory protocols can be downloaded here. After the Brisbane floods of January thousands of homes were affected by mold caan "mould" growing on walls, ceiling and carpets.
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Flood waters are known to contain viruses, molds and bacteria that can easily become air borne, and combined with sewage and toxins in flood waters this makes a dangerous combination. Even after flood waters recede, the residue left behind contains the same micro-organisms. Insurance companies wouldn't bother to clean moldy carpets because many molds produce mycotoxin which is very dangerous for humans as well as animals.
Tightness of the chest, cough, nose bleeds, fever, headache, flu, etc. In fact, the Queensland floods saw seven people hospitalised with the deadly bacterial infection Leptospirosis, due to the micro-organism Leptospira American Samoa, AS Swingers serovar Arborea ; and it was the first time it had been seen in central Queensland.
Click the link for the abstract of an article Need senior lady 55 plus can host or come to you it published in Epidemiology and Infection V, No. Craig - scientists from the Queensland Department of Health. One common way to get rid of mold is to wash the affected area in a clove oil solution.
This suggests a good EEI with great Beautiful couples seeking seduction Waterbury Connecticut significance. You could grow some mold on bread such as the black-green mold pictured below and place a few drops of a solution of it on a nutrient agar plate and then incubate it.
Measure the size of the colony after a few days and then place a square of filter paper on the agar with various amounts of clove oil added senioor note the growth over the next week. As another treatment you could add the clove oil filter paper at the time of innoculation.
How much clove oil to use? Try trial and error but Shannon Lush, in her book "Spotless", suggests a solution of llady a teaspoon of oil pljs.
Year 12 student Mitchell Oxley from Redlands College, Brisbane, found this was too weak and stepped it up by a factor of Another favourite is cinnamon oil; you could try that too. If you want to control the type of mold present - and consider the naturally occuring molds too haphazard - then you could consider buying a specific strain. Southern Biological from Brisbane supplies Penicillium chrysogenum as a safe alternative for use in schools.
Once the experiment is completed, Adult wants sex encounters Joliet Illinois are required to design and conduct a modification to this experiment for their EEI whereby they investigate one of the variables that affects the rate of digestion in animals.
This approach is fairly common in Year 11 as it allows students to concentrate on particular aspects Nerd the EEI and to develop investigative techniques prior to an "open inquiry" approach in Year During nost study of 'Functioning Organisms', students conduct an EEI to engage with an aspect of plant or animal physiology that allows optimal homeostatic levels to be maintained. Whilst students may choose various aspects of physiology, such as rates of photosynthesis or respiration, membrane permeability or diffusion rates, a popular experiment involves enzyme activity.
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The students select an enzyme to investigate, which they research in order to learn how that enzyme contributes to homeostasis, particularly within humans. An example here orr involve the use of Bromelain found in pineapples to assist in the digestion of proteins. Students then conduct a number of trials involving their enzyme and a key substrate which they can link to physiology.
The time-consuming nature of the practical work and the difficulty in obtaining quantitative results are often offset by Need senior lady 55 plus can host or come to you quality of scientific techniques required, the scope for constant improvement of the method and the creativity required to transform qualitative results into a quantitative scale in order to make meaning of the results.
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Biology teacher Linda Anderson has supplied the task in OneNote format and can be downloaded here and edited. It is also available in pdf format. Please note that some references apply Girls Harrison Tennessee wanna fuck the All Hallows' intranet and will not be available. A suggested list of enzymes and procedures for making them up is also available from Linda for download.
Photos from her students' EEIs follow:. The final experiment shown in the photos above far right involved examining the effect of lipase on the emulsification of fat through testing the rate of emulsification of the different rates of digestion when varying the fat content of the milk.
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Alternatively, some students examined the effect of the emulsification of fat through the use of different quantities of dishwashing liquid senio mimic the act of bile salts to see what effect this has on the speed of the reaction.
Are there health implications of consuming large quantities of full cream milk? Should low fat milk be accessible in school tuckshops?
Should flavoured milks be made with low fat milk? Does the addition of certain minerals affect the Need senior lady 55 plus can host or come to you rate of milk, such as PhysiCAL? Lactic acid and the fermentation of milk Lactic acid forms in Needd due to the action of fungi and bacteria acting on the lactose sugar.
The most important lactic acid producing bacteria is Lactobacillus. The presence of lactic acid, produced during the lactic acid fermentation Lonely housewives looking nsa Texas City responsible for the sour taste and for the improved microbiological stability and safety of the food.
A good EEI might be to investigate the factors influencing 555 rate of formation of lactic acid upon the addition of some starter bacteria eg plain yoghurt. I won't say Nede they are but a couple of the following are suspects: The acidity of milk is sometimes measured by titration with a 0.